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Depression recovery can be hard to measure − new research on deep brain stimulation shows how objective biomarkers could help make treatment more precise

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Depression recovery can be hard to measure − new research on deep brain stimulation shows how objective biomarkers could help make treatment more precise

Deep brain stimulation can alleviate treatment-resistant depression for some patients.
PM Images/Digital Vision via Getty Images

Christopher Rozell, Georgia Institute of Technology and Sankaraleengam Alagapan, Georgia Institute of Technology

It can be challenging to create a treatment plan for depression. This is especially true for patients who aren’t responding to conventional treatments and are undergoing experimental therapies such as deep brain stimulation. For most medical conditions, doctors can directly measure the part of the body that is being treated, such as blood pressure for cardiovascular disease. These measurable changes serve as an objective biomarker of recovery that provides valuable information about how to care for these patients.

On the other hand, for depression and other psychiatric disorders, clinicians rely on subjective and nonspecific surveys that ask patients about their symptoms. When a patient tells their doctor they are experiencing negative emotions, is that because they are relapsing in their depression or because they had a bad day like everyone does sometimes? Are they anxious because their depression symptoms have lessened enough that they are experiencing new feelings, or do they have some other medical problem independent of their depression? Each reason may indicate a different course of action, such as altering a medication, addressing an issue in psychotherapy or increasing the intensity of brain stimulation treatment.

We are neuroengineers. In our study, newly published in Nature, we identified potential biomarkers for deep brain stimulation that could one day help guide clinicians and patients when making treatment decisions for those using this approach to alleviate treatment-resistant depression.

Deep brain stimulation involves surgically implanting electrodes in the brain.

Biomarker for depression

Clinical depression does not respond to available therapies in a significant number of patients. Researchers have been working to find alternative options for those with treatment-resistant depression, and many decades of experiments have identified specific brain networks with abnormal electrical activity in those with depression.

This notion of depression as abnormal brain activity rather than a chemical imbalance led to the development of deep brain stimulation as a depression treatment: a surgically implanted, pacemaker-like device that delivers electrical impulses to certain areas of the brain. Studies testing this technique have found that it can decrease depression severity over time in most patients.

Our research team wanted to find specific changes in brain activity that could serve as a biomarker that objectively measures how well deep brain stimulation is helping patients with depression. So we monitored the brain activity of 10 patients receiving deep brain stimulation for severe treatment-resistant depression over six months.

At the end of six months, 90% of the patients responded to the therapy – defined by a reduction of symptoms by at least a half – and 70% were in remission, meaning they no longer met the criteria for clinical depression.

To identify a potential biomarker, we developed an algorithm that looked for patterns in brain activity changes as patients recovered. The algorithm was based on data from six out of the original 10 patients who had usable data from the experiment. We found that there are coordinated changes in different frequencies present in the electrical activity within the area of the brain being stimulated. Using these patterns, the algorithm was able to predict whether someone was in a stable recovery with 90% accuracy each week.

Interestingly, we observed some parts of this pattern moved in the opposite direction later in stimulation therapy compared with the patterns at the start of therapy. This finding provides evidence that the long-term recovery is due to the brain adapting to the stimulation in a process called plasticity rather than as a direct effect of the stimulation itself.

Person lying in bed, light speckled over their face.
Depression is a debilitating disease.
Guido Mieth/Moment via Getty Images

We also saw other potential biomarkers worth investigating further.

For example, abnormalities in brain imaging taken before implanting the electrodes in specific parts of the brain correlated with how sick each patient was. This could provide clues about what’s causing depression in some people, or help develop imaging methods to determine who might be a good candidate for deep brain stimulation.

For another example, we found that the facial expressions of patients changed as their brains changed over the course of their treatment. While physicians often report this anecdotally, quantifying these changes may provide a way to develop objective markers of recovery that incorporate a patient’s behavior with their brain signals.

Because the results of our study are based on a small sample of patients, it’s important to further investigate how broadly they can be applied to other patients and newer deep brain stimulation devices.

Improving decision-making for depression

Clinical depression is a debilitating condition that causes significant personal and societal suffering. It is one of the largest contributors to the overall disease burden of many countries. Despite the many approved treatments available, nearly 30% of the 8.9 million U.S. adults taking medications for clinical depression continue to have symptoms.

Deep brain stimulation is one of the alternative therapies for treatment-resistant depression that researchers are investigating. Studies have shown that deep brain stimulation can offer effective and long-term relief for some patients.

Although deep brain stimulation is an approved treatment for other conditions like Parkinson’s disease, it remains an experimental therapy for treatment-resistant depression. While the results from small experimental studies have been positive, they have not been successfully replicated in large-scale, randomized clinical trials necessary for approval from the U.S. Food and Drug Administration.

Finding an objective biomarker that measures recovery in depression has the potential to improve treatment decisions. For example, one patient in our study had a relapse after several months of remission. Were a biomarker available at the time, the clinical team would have had warning that the patient was relapsing weeks before standard symptom surveys showed that anything was wrong. Such a tool could help clinicians intervene before a relapse becomes an emergency.The Conversation

Christopher Rozell, Professor of Electrical and Computer Engineering, Georgia Institute of Technology and Sankaraleengam Alagapan, Research Scientist in Electrical and Computer Engineering, Georgia Institute of Technology

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Chaos gardening – wild beauty, or just a mess? A sustainable landscape specialist explains the trend

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theconversation.com – Deryn Davidson, Sustainable Landscape State Specialist, Extension, Colorado State University – 2025-08-19 07:35:00


Chaos gardening is a trending, informal practice of scattering mixed seeds—often leftover or wildflower mixes—onto soil with little planning, resulting in a dense, colorful garden. It appeals as a low-pressure, playful alternative to traditional garden design, which can feel intimidating and time-consuming. Success depends on some “guardrails”: choosing compatible, region-appropriate plants, prepping the site, and supporting pollinators with native flowers. However, chaos gardening isn’t ecological restoration and requires maintenance to thrive. While not a replacement for curated gardens, it can inspire novice gardeners, encouraging experimentation, connection with nature, and appreciation of biodiversity through a more intuitive gardening approach.

A mix of annuals and perennials can look colorful and carefree.
Deryn Davidson

Deryn Davidson, Colorado State University

If you’ve spent any time in the gardening corners of social media lately, you’ve likely come across a trend called “chaos gardening.”

The name alone is eye-catching – equal parts fun, rebellious and slightly alarming. Picture someone tossing random seeds into bare soil, watering once or twice, and ending up with a backyard jungle of blooms. No rows, no color coordination, no spacing charts. Just sprinkle and hope for the best.

As a sustainable landscape specialist at Colorado State University Extension, I think a lot about how to help people make designed landscapes more sustainable. Occasionally, a new trend like this one crops up claiming to be the silver bullet of gardening – supposedly it saves water, saves the bees and requires no maintenance.

But what is chaos gardening, really? And does it work? As with most viral trends, the answer is: sometimes.

What chaos gardening is and isn’t

At its core, chaos gardening is the practice of mixing a wide variety of seeds, often including leftover packets, wildflower mixes, or cut flower favorites, and scattering them over a planting area with minimal planning.

The goal is to create a dense, colorful garden that surprises you with its variety. For many, it’s a low-pressure, joyful way to experiment.

But chaos gardening isn’t the same as ecological restoration, pollinator meadow planting or native prairie establishment. Unlike chaos gardening, all of these techniques rely on careful species selection, site prep and long-term management.

Chaos gardening is a bit like making soup from everything in your pantry – it might be delicious, but there are no guarantees.

Chaos gardening’s appeal

One reason chaos gardening may be catching on is because it sidesteps the rules of garden design. A traditional landscape design approach is effective and appropriate for many settings, but it is a time investment and can feel intimidating. Design elements and principles, and matching color schemes, don’t fit everyone’s style or skill set.

A flower bed with a curved border, and curved rows of white and pink flowers, with equally spaced hedges and bushes
Organized and manicured home gardens such as this can be stressful to maintain.
Elenathewise/iStock via Getty Images Plus

Even the apparently relaxed layers of blooms and informal charm of an English cottage garden actually result from careful planning. Chaos gardening, by contrast, lets go of control. It offers a playful, forgiving entry point into growing things. In a way, chaos gardening is an antidote to the pressure of perfection, especially the kind found in highly curated, formal landscapes.

There’s also the allure of ease. People want gardening to be simple. If chaos gardening brings more people into the joy and mess of growing things, I consider that a win in itself. Broader research has found that emotional connection and accessibility are major motivators for gardening, often more than environmental impact.

When does chaos gardening work?

The best outcomes from chaos gardening happen when the chaos has a few guardrails:

  • Choose plants with similar needs. Most successful chaos gardens rely on sun-loving annuals that grow quickly and bloom prolifically, like zinnias, cosmos, marigolds, snapdragons and sunflowers. These are also excellent cut flowers to use in bouquets, which makes them doubly rewarding.

  • Consider your region. A chaos garden that thrives in Colorado might flop in North Carolina. It is beneficial to select seed mixes or individual varieties suited to your area since factors like soil type and growing season length matter. Different plants have unique needs beyond just sun and water; soil pH, cold hardiness and other conditions can make a big difference.

  • Think about pollinators. Mixing in nectar- and pollen-rich flowers native to North America, such as black-eyed Susans, bee balm or coneflowers, provides valuable resources for native bees, butterflies, moths and other local pollinators. These species benefit even more if you plan your garden with phenology – that is, nature’s calendar – in mind. By maintaining blooms from early spring through late fall, you ensure a steady food supply throughout the growing season. Plus, a diverse plant palette supports greater pollinator abundance and diversity.

  • Prep your site. Even “chaos” needs a little order. Removing weeds, loosening the top layer of soil and watering regularly, especially during germination when seeds are sprouting, will dramatically improve your results. Successful seed germination requires direct seed-to-soil contact and consistent moisture; if seeds begin to grow and then dry out, many species will not survive.

When does chaos gardening not work?

There are a few key pitfalls to chaos gardening that often get left out of the online hype:

  • Wrong plant, wrong place. If your mix includes shade-loving plants and your garden is in full sun, or drought-tolerant plants whose seeds end up in a soggy low spot, they’ll struggle to grow.

  • Invasive species and misidentified natives. Some wildflower mixes, especially inexpensive or mass-market ones, claim to be native but actually contain non-native species that can spread beyond your garden and become invasive. While many non-natives are harmless, some spread quickly and disrupt natural ecosystems. Check seed labels carefully and choose regionally appropriate native or adapted species whenever possible.

  • Soil, sun and water still matter. Gardening is always a dialogue with place. Even if you’re embracing chaos, taking notes, observing how light moves through your space, and understanding your soil type will help you know your site better, and choose appropriate plants.

  • Maintenance is still a thing. Despite the “toss and walk away” aesthetic, chaos gardens still require care. Watering, weeding and eventually cutting back or removing spent annuals are all part of the cycle.

Beyond the hashtag

Beneath the chaos gardening memes, there’s something real happening: a growing interest in a freer, more intuitive way of gardening. And that’s worth paying attention to.

Once someone has success with a zinnia or cosmos, they may be inspired to try more gardening. They might start noticing which flowers the bees are visiting in their garden. They may discover native plants and pay attention to the soil they are tending, seeing how both are part of a larger, living system. A chaotic beginning can become something deeper.

An orange and black butterfly perched on top of a flowerhead with small, pink flowers
Choosing nectar-rich flowers such as milkweed for your seed mix can help local pollinators.
Brian Woolman/iStock via Getty Images Plus

Chaos gardening might not replace the structured borders of a manicured garden or a carefully curated pollinator patch, but it might get someone new into the garden. It might lower the stakes, invite experimentation and help people see beauty in abundance rather than control.

If that’s the entry point someone needs, then let the chaos begin.The Conversation

Deryn Davidson, Sustainable Landscape State Specialist, Extension, Colorado State University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Organized and manicured home gardens such as this can be stressful to maintain.
Elenathewise/iStock via Getty Images Plus

Even the apparently relaxed layers of blooms and informal charm of an English cottage garden actually result from careful planning. Chaos gardening, by contrast, lets go of control. It offers a playful, forgiving entry point into growing things. In a way, chaos gardening is an antidote to the pressure of perfection, especially the kind found in highly curated, formal landscapes.

There’s also the allure of ease. People want gardening to be simple. If chaos gardening brings more people into the joy and mess of growing things, I consider that a win in itself. Broader research has found that emotional connection and accessibility are major motivators for gardening, often more than environmental impact.

When does chaos gardening work?

The best outcomes from chaos gardening happen when the chaos has a few guardrails:

  • Choose plants with similar needs. Most successful chaos gardens rely on sun-loving annuals that grow quickly and bloom prolifically, like zinnias, cosmos, marigolds, snapdragons and sunflowers. These are also excellent cut flowers to use in bouquets, which makes them doubly rewarding.

  • Consider your region. A chaos garden that thrives in Colorado might flop in North Carolina. It is beneficial to select seed mixes or individual varieties suited to your area since factors like soil type and growing season length matter. Different plants have unique needs beyond just sun and water; soil pH, cold hardiness and other conditions can make a big difference.

  • Think about pollinators. Mixing in nectar- and pollen-rich flowers native to North America, such as black-eyed Susans, bee balm or coneflowers, provides valuable resources for native bees, butterflies, moths and other local pollinators. These species benefit even more if you plan your garden with phenology – that is, nature’s calendar – in mind. By maintaining blooms from early spring through late fall, you ensure a steady food supply throughout the growing season. Plus, a diverse plant palette supports greater pollinator abundance and diversity.

  • Prep your site. Even “chaos” needs a little order. Removing weeds, loosening the top layer of soil and watering regularly, especially during germination when seeds are sprouting, will dramatically improve your results. Successful seed germination requires direct seed-to-soil contact and consistent moisture; if seeds begin to grow and then dry out, many species will not survive.

When does chaos gardening not work?

There are a few key pitfalls to chaos gardening that often get left out of the online hype:

  • Wrong plant, wrong place. If your mix includes shade-loving plants and your garden is in full sun, or drought-tolerant plants whose seeds end up in a soggy low spot, they’ll struggle to grow.

  • Invasive species and misidentified natives. Some wildflower mixes, especially inexpensive or mass-market ones, claim to be native but actually contain non-native species that can spread beyond your garden and become invasive. While many non-natives are harmless, some spread quickly and disrupt natural ecosystems. Check seed labels carefully and choose regionally appropriate native or adapted species whenever possible.

  • Soil, sun and water still matter. Gardening is always a dialogue with place. Even if you’re embracing chaos, taking notes, observing how light moves through your space, and understanding your soil type will help you know your site better, and choose appropriate plants.

  • Maintenance is still a thing. Despite the “toss and walk away” aesthetic, chaos gardens still require care. Watering, weeding and eventually cutting back or removing spent annuals are all part of the cycle.

Beyond the hashtag

Beneath the chaos gardening memes, there’s something real happening: a growing interest in a freer, more intuitive way of gardening. And that’s worth paying attention to.

Once someone has success with a zinnia or cosmos, they may be inspired to try more gardening. They might start noticing which flowers the bees are visiting in their garden. They may discover native plants and pay attention to the soil they are tending, seeing how both are part of a larger, living system. A chaotic beginning can become something deeper.

An orange and black butterfly perched on top of a flowerhead with small, pink flowers

Choosing nectar-rich flowers such as milkweed for your seed mix can help local pollinators.
Brian Woolman/iStock via Getty Images Plus

Chaos gardening might not replace the structured borders of a manicured garden or a carefully curated pollinator patch, but it might get someone new into the garden. It might lower the stakes, invite experimentation and help people see beauty in abundance rather than control.

If that’s the entry point someone needs, then let the chaos begin.

Read More

The post Chaos gardening – wild beauty, or just a mess? A sustainable landscape specialist explains the trend appeared first on theconversation.com



Note: The following A.I. based commentary is not part of the original article, reproduced above, but is offered in the hopes that it will promote greater media literacy and critical thinking, by making any potential bias more visible to the reader –Staff Editor.

Political Bias Rating: Centrist

This content focuses on gardening practices and environmental awareness without promoting any particular political ideology. It presents information in a balanced, informative manner, emphasizing sustainability and ecological considerations while avoiding partisan language or viewpoints. The article encourages accessibility and experimentation in gardening, appealing broadly without aligning with left- or right-leaning political perspectives.

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RFK Jr.’s plans to overhaul ‘vaccine court’ system would face legal and scientific challenges

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theconversation.com – Anna Kirkland, Professor of Women’s and Gender Studies, University of Michigan – 2025-08-15 07:39:00


The Vaccine Injury Compensation Program (VICP), established in 1986, provides a legal process for compensating individuals harmed by vaccines while protecting manufacturers from lawsuits. Health Secretary Robert F. Kennedy Jr. criticizes the system as biased and slow, proposing reforms or dismantling it. Experts acknowledge the program needs updates, such as increasing judges, adjusting damage caps, and expanding vaccine coverage. However, significant changes face legal and political challenges. Kennedy’s suggestion to add unproven injuries like autism to the list contradicts scientific consensus and may face lawsuits. Proposals to move claims to regular courts could hinder compensation efforts and threaten vaccine supply stability.

The Vaccine Injury Compensation Program was established in 1986 by an act of Congress.
MarsBars/iStock via Getty Images Plus

Anna Kirkland, University of Michigan

For almost 40 years, people who suspect they’ve been harmed by a vaccine have been able to turn to a little-known system called the Vaccine Injury Compensation Program – often simply called the vaccine court.

Health and Human Services Secretary Robert F. Kennedy Jr. has long been a critic of the vaccine court, calling it “biased” against compensating people, slow and unfair. He has said that he wants to “revolutionize” or “fix” this system.

I’m a scholar of law, health and medicine. I investigated the history, politics and debates about the Vaccine Injury Compensation Program in my book “Vaccine Court: The Law and Politics of Injury.”

Although vaccines are extensively tested and monitored, and are both overwhelmingly safe for the vast majority of people and extremely cost-effective, some people will experience a harmful reaction to a vaccine. The vaccine court establishes a way to figure out who those people are and to provide justice to them.

Having studied the vaccine court for 15 years, I agree that it could use some fixing. But changing it dramatically will be difficult and potentially damaging to public health.

Deciphering vaccine injuries

The Vaccine Injury Compensation Program is essentially a process that enables doctors, lawyers, patients, parents and government officials to determine who deserves compensation for a legitimate vaccine injury.

It was established in 1986 by an act of Congress to solve a specific social problem: possible vaccine injuries to children from the whole-cell pertussis vaccine. That vaccine, which was discontinued in the U.S. in the 1990s, could cause alarming side effects like prolonged crying and convulsions. Parents sued vaccine manufacturers, and some stopped producing vaccines.

Congress was worried that lawsuits would collapse the country’s vaccine supply, allowing diseases to make a comeback. The National Childhood Vaccine Injury Act of 1986 created the vaccine court process and shielded vaccine manufacturers from these lawsuits.

Here’s how it works: A person who feels they have experienced a vaccine-related injury files a claim to be heard by a legal official called a special master in the U.S. Court of Federal Claims. The Health and Human Services secretary is named as the defendant and is represented by Department of Justice attorneys.

A syringe leaning against a gavel on a white background
Many experts agree that the vaccine compensation program could use some updates.
t_kimura via iStock / Getty Images Plus

Doctors who work for HHS evaluate the medical records and make a recommendation about whether they think the vaccine caused the person’s medical problem. Some agreed-upon vaccine injuries are listed for automatic compensation, while other outcomes that are scientifically contested go through a hearing to determine if the vaccine caused the problem.

Awards come from a trust fund, built up through a 75-cent excise tax on each dose of covered vaccine sold. Petitioners’ attorneys who specialize in vaccine injury claims are paid by the trust fund, whether they win or lose.

Some updates are needed

Much has changed in the decades since Congress wrote the law, but Congress has not enacted updates to keep up.

For instance, the law supplies only eight special masters to hear all the cases, but the caseload has risen dramatically as more vaccines have been covered by the law. It set a damages cap of US$250,000 in 1986 but did not account for inflation. The statute of limitations for an injury is three years, but in my research, I found many people file too late and miss their chance.

When the law was written, it only covered vaccines recommended for children. In 2023, the program expanded to include vaccines for pregnant women. Vaccines just for adults, like shingles, are not covered. COVID-19 vaccine claims go to another system for emergency countermeasures vaccines that has been widely criticized. These vaccines could be added to the program, as lawyers who bring claims there have advocated.

These reform ideas are “friendly amendments” with bipartisan support. Kennedy has mentioned some of them, too.

A complex system is hard to revolutionize

Kennedy hasn’t publicly stated enough details about his plan for the vaccine court to reveal the changes he intends to make. The first and least disruptive course of action would be to ask Congress to pass the bipartisan reforms noted above.

But some of his comments suggest he may seek to dismantle it, not fix it. None of his options are straightforward, however, and consequences are hard to predict.

Robert F. Kennedy Jr., Secretary of the Department of Health and Human Services, testifying in Congress
HHS Secretary Robert Kennedy Jr. has said he plans to revolutionize the vaccine court.
Kayla Bartkowski / Staff, Getty Images News

Straight up changing the vaccine court’s structure would probably be the most difficult path. It requires Congress to amend the 1986 law that set it up and President Donald Trump to sign the legislation. Passing the bill to dismantle it requires the same process. Either direction involves all the difficulties of getting a contentious bill through Congress. Even the “friendly amendments” are hard – a 2021 bill to fix the vaccine court was introduced but failed to advance.

However, there are several less direct possibilities.

Adding autism to the injuries list

Kennedy has long supported discredited claims about harms from vaccines, but the vaccine court has been a bulwark against claims that lack mainstream scientific support. For example, the vaccine court held a yearslong court process from 2002 to 2010 and found that autism was not a vaccine injury. The autism trials drew on 50 expert reports, 939 medical articles and 28 experts testifying on the record. The special masters deciding the cases found that none of the causation hypotheses put forward to connect autism and vaccines were reliable as medical or scientific theories.

Much of Kennedy’s ire is directed at the special masters, who he claims “prioritize the solvency” of the system “over their duty to compensate victims.” But the special masters do not work for him. Rather, they are appointed by a majority of the judges in the Court of Federal Claims for four-year terms – and those judges themselves have 15-year terms. Kennedy cannot legally remove any of them in the middle of their service to install new judges who share his views.

Given that, he may seek to put conditions like autism on the list of presumed vaccine injuries, in effect overturning the special masters’ decisions. Revising the list of recognized injuries to add ones without medical evidence is within Kennedy’s powers, but it would still be difficult. It requires a long administrative process with feedback from an advisory committee and the public. Such revisions have historically been controversial, and are usually linked to major scientific reviews of their validity.

Public health and medical groups are already mobilized against Kennedy’s vaccine policy moves. If he failed to follow legally required procedures while adding new injuries to the list, he could be sued to stop the changes.

Targeting vaccine manufacturers

Kennedy could also lean on his newly reconstituted Advisory Committee on Immunization Practices to withdraw recommendations for certain vaccines, which would also remove them from eligibility in the vaccine compensation court. Lawsuits against manufacturers could then go straight to regular courts. On Aug. 14, 2025, the Department of Health and Human Services may have taken a step in this direction by announcing the revival of a childhood vaccine safety task force in response to a lawsuit by anti-vaccine activists.

Kennedy has also supported legislation that would allow claims currently heard in vaccine court to go to regular courts. These drastic reforms could essentially dismantle the vaccine court.

People claiming vaccine injuries could hope to win damages through personal injury lawsuits in the civil justice system instead of vaccine court, perhaps by convincing a jury or getting a settlement. These types of settlements were what prompted the creation of the vaccine court in the first place. But these lawsuits could be hard to win. There is a higher bar for scientific evidence in regular courts than in vaccine court, and plaintiffs would have to sue large corporations rather than file a government claim.

Raising the idea of reforming the vaccine court has provoked strong reactions across the many groups with a stake in the program. It is a complex system with multiple constituents, and Kennedy’s approaches so far pull in different directions. The push to revolutionize it will test the strength of its complex design, but the vaccine court may yet hold up.The Conversation

Anna Kirkland, Professor of Women’s and Gender Studies, University of Michigan

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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The post RFK Jr.’s plans to overhaul ‘vaccine court’ system would face legal and scientific challenges appeared first on theconversation.com



Note: The following A.I. based commentary is not part of the original article, reproduced above, but is offered in the hopes that it will promote greater media literacy and critical thinking, by making any potential bias more visible to the reader –Staff Editor.

Political Bias Rating: Center-Left

The content presents a fact-based, nuanced analysis of the Vaccine Injury Compensation Program and Robert F. Kennedy Jr.’s criticisms and proposed reforms. It acknowledges the safety and effectiveness of vaccines, aligns with mainstream scientific consensus, and highlights bipartisan efforts for reform. While it critiques Kennedy’s more controversial positions, especially regarding discredited vaccine-autism links, it does so with measured language and provides context on legal and public health complexities. Overall, the article leans slightly left by supporting established science and public health perspectives but remains balanced and informative without strong partisan rhetoric.

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Genomics can help insect farmers avoid pitfalls of domestication

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theconversation.com – Christine Picard, Professor of Biology, Indiana University – 2025-08-14 07:29:00


Insect farming is gaining popularity for animal feed, pet food, and human consumption, but domestication poses challenges. Lessons from traditional domestication—selective breeding for desirable traits—apply to insects like silkworms and honeybees, which have become dependent on humans. New insect species such as black soldier flies and mealworms offer sustainable protein by recycling organic waste. However, domestication often reduces genetic diversity and immune strength, increasing vulnerability to diseases, as seen in factory-farmed chickens and monoculture crops like bananas. Modern genomics and gene-editing tools can help monitor and maintain genetic health, preventing collapse and supporting sustainable insect agriculture.

A biologist maintains a large population of black soldier flies for protein farming.
picture alliance/Contributer via Getty Images

Christine Picard, Indiana University and Hector Rosche-Flores, Indiana University

Insects are becoming increasingly popular to grow on farms as feed for other animals, pet food and potentially as food for people. The process of bringing a wild animal into an artificial environment, known as domestication, comes with unique challenges. Luckily, there are important lessons to be learned from all the other animals people have domesticated over millennia.

As researchers who study how domesticating animals changes their genes, we believe that recognizing the vulnerabilities that come with domestication is important. Today’s powerful biotechnology tools can help researchers anticipate and head off issues early on.

Domestication is nothing new

From grain domestication starting as far back as 12,000 years ago to today’s high-tech, genome-based breeding strategies, humans have long bent nature to suit their purposes. By selectively breeding individual plants or animals that have desirable traits – be it appearance, size or behavior – humans have domesticated a whole host of species.

The same principle underlies all domestication attempts, from dogs to crops. A breeder identifies an individual with a desired trait – whether that’s a dog’s talent for tracking or a plant’s ability to withstand pests. Then they breed it to confirm that the desired trait can be passed down to offspring. If it works, the breeder can grow lots of descendants in a lineage with the genomic advantage.

People have made crops resilient to disease and environmental challenges, docile cows that yield more milk or meat, large-breasted poultry and cute dogs.

A long history of insects working for people

Insect domestication is also far from new. People have reared silkworms (Bombyx mori) to produce silk for over 5,000 years. But selective breeding and isolation from wild relatives have led to their inability to fly, dependence on one food source and need for assistance to reproduce. As a result, silkworms are wholly reliant on humans for survival, and the original species doesn’t exist anymore.

A white moth sitting on a white cocoon on top of a leaf
Silk moths have lost their ability to fly and are completely dependent on humans for survival.
baobao ou/Moment Open via Getty Images

Similarly, people have maintained colonies of the western honeybee (Apis mellifera) for pollination and honey production for centuries. But bees are at risk due to colony collapse disorder, a phenomenon where worker bees disappear from seemingly healthy hives. The causes of colony collapse disorder are unknown; researchers are investigating disease and pesticides as possible factors.

Now the insect agriculture industry has set its sights on domesticating some other insects as a source of sustainably farmed protein for other animals or people.

Insects such as the black soldier fly (Hermetia illucens) and the mealworm (Tenebrio molitor) can grow on existing organic waste streams. Rearing them on organic farm and food waste circularizes the agricultural system and reduces the environmental footprint of growing proteins.

But these insects will need to be grown at scale. Modern agriculture relies on monocultures of species that allow for uniformity in size and synchronized growth and harvest. Domesticating wild insects will be necessary to turn them into farmed animals.

A large number of white larvae in a dry food medium
Black soldier fly larvae feed on a mixture of wheat bran, corn and alfalfa when reared in labs and farms.
Christine Picard

Domestication has an immunity downside

Chickens today grow faster and bigger than ever. But factory-farmed animals are genetically very homogeneous. Moreover, people take care of everything for these domesticated animals. They have easy access to food and are given antibiotics and vaccines for their health and safety.

Consequently, industrially-farmed chickens have lost a lot of their immune abilities. Building these strong disease-fighting proteins requires a lot of energy. Since their spotless, controlled environments protect them, those immune genes are just not needed. The energy their bodies would typically use to protect themselves can instead be used to grow bigger.

In the wild, individuals with faulty immune genes would likely be killed by pathogens, quickly wiping these bad genes out from the population. But in a domesticated environment, such individuals can survive and pass on potentially terrible genes.

The H5N1 bird flu provides a recent example of what can go wrong when a homogeneous population of domesticated animals encounters a dangerous pathogen. When disease broke out, the poor immune systems of domesticated chickens cracked under the pressure. The disease can spread quickly through large facilities, and eventually all chickens there must be euthanized.

Hundreds of brown chickens with red crowns being reared in an indoor facility
Industrially-farmed chickens are genetically homogenous and have lost much of their immune defenses.
pidjoe/E+ via Getty Images

Domestication and the risks of monoculture

Weak immune systems aren’t the only reason the bird flu spread like it did.

Domestication often involves growing large numbers of a single species in small concentrated areas, referred to as a monoculture. All the individuals in a monoculture are roughly the same, both physically and in their genes, so they all have the same susceptibilities.

Banana cultivars are one example. Banana plants grown in the early 1900s were all descendants of a single clone, named Gros Michel. But when the deadly Panama disease fungus swept through, the plants had no defenses and the cultivar was decimated.

Banana growers turned to the Cavendish variety, grown in the largest banana farms today. The banana industry remains vulnerable to the same kind of risk that took down Gros Michel. A new fungal strain is on the rise, and scientists are rushing to head off a global Cavendish banana collapse.

Lessons about weaknesses that come with domestication are important to the relatively new industry advancing insects as the future of sustainable protein production and organic waste recycling.

How genomics can help correct course

Modern genomics can give insect agriculture a new approach to quality control. Technological tools can help researchers learn how an organism’s genes relate to its physical traits. With this knowledge, scientists can help organisms undergoing domestication bypass potential downsides of the process.

For instance, scientists combined data from hundreds of different domesticated tomato genomes, as well as their wild counterparts. They discovered something you’ve probably experienced – while selecting for longer shelf life, tomato flavor genes were unintentionally bred out.

A similar approach of screening genomes has allowed scientists to discover the combination of genes that enhances milk production in dairy cows. Farmers can intentionally breed individuals with the right combinations of milk-producing genes while keeping an eye on what other genes the animals have or lack. This process ensures that breeders don’t lose valuable traits, such as robust immune systems or high fertility rates, while selecting for economically valuable traits during domestication.

Insect breeders can take advantage of these genetic tools from the outset. Tracking an animal population’s genetic markers is like monitoring patients’ vital signs in the hospital. Insect breeders can look at genes to assess colony health and the need for interventions. With regular genetic monitoring of the farmed population, if they begin to see individuals with markers for some “bad” genes, they can intervene right away, instead of waiting for a disaster.

Mechanisms to remedy an emerging disaster include bringing in a new brood from the wild or another colony whose genes can refresh the domesticated population’s inbred and homogeneous genome. Additionally, researchers could use gene-editing techniques such as CRISPR-Cas9 to replicate healthy and productive combinations of genes in a whole new generation of domesticated insects.

Genomics-assisted breeding is a supplement to standard practices and not a replacement. It can help breeders see which traits are at risk, which ones are evolving, and where natural reservoirs of genetic diversity might be found. It allows breeders to make more informed decisions, identify genetic problems and be proactive rather than reactive.

By harnessing the power of genomics, the insect agriculture industry can avoid setting itself up for an accidental future collapse while continuing to make inroads on sustainable protein production and circularizing the agricultural ecosystem.The Conversation

Christine Picard, Professor of Biology, Indiana University and Hector Rosche-Flores, Ph.D. Student in Biology, Indiana University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Note: The following A.I. based commentary is not part of the original article, reproduced above, but is offered in the hopes that it will promote greater media literacy and critical thinking, by making any potential bias more visible to the reader –Staff Editor.

Political Bias Rating: Centrist

The content presents a factual, science-based discussion on insect domestication and sustainable agricultural practices without promoting a specific political agenda. It focuses on the benefits and risks of domestication and biotechnology, highlighting both challenges and technological solutions in a balanced manner. The article underscores environmental sustainability and advances in genomics while maintaining an objective tone, characteristic of centrist perspectives that weigh multiple facets pragmatically.

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