Health
What Enables Herpes Simplex Virus To Become Impervious to Drugs?
Research pinpoints key to the cold sore virus’s ability to evade treatment, offering broader clues on antiviral drug resistance
Newswise — All organisms — from fungi to mammals — have the capacity to evolve and adapt to their environments. But viruses are master shapeshifters with an ability to mutate greater than any other organism. As a result, they can evade treatments or acquire resistance to once-effective antiviral medications.
Is the Herpes Simplex Virus Becoming Impervious to Drugs?
Working with herpes simplex virus (HSV), a new study led by Harvard Medical School researchers sheds light on one of the ways in which the virus becomes resistant to treatment, a problem that could be particularly challenging among people with compromised immune function, including those receiving immune-suppressive treatment and those born with immune deficiencies.
Using a sophisticated imaging technique called cryogenic electron microscopy (cryo-EM), the researchers found that how parts of a protein responsible for viral replication move into different positions can alter the virus’s susceptibility to medicines.
The findings, published Aug. 27 in Cell, answer long-standing questions about why certain viruses, but not others, are susceptible to antiviral medications and how viruses become impervious to drugs. The results could inform new approaches that impede viruses’ capacity to outpace effective therapies.
Counterintuitive results
Researchers have long known changes that occur on the parts of a virus where antiviral drugs bind to it can render it resistant to therapy. However, the HMS researchers found that, much to their surprise, this was often not the case with HSV.
Instead, the investigators discovered that protein mutations linked to drug resistance often arise far from the drug’s target location. These mutations involve alterations that change the movements of a viral protein, or enzyme, that allows the virus to replicate itself. This raises the possibility that using drugs to block or freeze the conformational changes of these viral proteins could be a successful strategy for overcoming drug resistance.
“Our findings show that we have to think beyond targeting the typical drug-binding sites,” said the study’s senior author, Jonathan Abraham, associate professor of microbiology in the Blavatnik Institute at HMS and infectious disease specialist at Brigham and Women’s Hospital. “This really helps us see drug resistance in a new light.”
The new findings propel the understanding of how alterations in the conformation of a viral protein — or changes in how the different parts within that protein move when it carries out its function — fuel drug resistance and may be relevant for understanding drug effectiveness and drug resistance in other viruses, the researchers noted.
HSV, estimated to affect billions of people worldwide, is most commonly known as the cause of cold sores and fever blisters, but it can also lead to serious eye infections, brain inflammation, and liver damage in people with compromised immunity. Additionally, HSV can be transmitted from mother to baby via the birth canal during delivery and cause life-threatening neonatal infections.
Clues on resistance rooted in structure and movement
A virus can’t replicate on its own. To do so, viruses must enter a host cell, where they unleash their replication tools — proteins called polymerases — to make copies of themselves.
The current study focused on one such protein — a viral DNA polymerase — crucial for HSV’s ability to reproduce and propagate itself. The ability to carry out its function is rooted in the DNA polymerase’s structure, often likened to a hand with three parts: the palm, the thumb, and the fingers, each carrying out critical functions.
Given their role in enabling replication, these polymerases are critical targets of antiviral drugs, which aim to stop the virus from reproducing itself and halt the spread of infection. The HSV polymerase is the target of acyclovir, the leading antiviral drug for treating HSV infection, and of foscarnet, a second-line drug used for drug-resistant infections. Both drugs work by targeting the viral polymerase but do so in different ways.
Scientists have long struggled to fully understand how alterations in the polymerase render the virus impervious to normal doses of antiviral drugs and, more broadly, why acyclovir and foscarnet are not always effective against the altered forms of the HSV polymerase.
“Over the years, the structures of many polymerases from various organisms have been determined, but we still don’t fully understand what makes some polymerases, but not others, susceptible to certain drugs,” Abraham said. “Our study reveals that how the different parts of the polymerases move, known as their conformational dynamics, is a critical component of their relative susceptibility to drugs.”
Proteins, including polymerases, are not rigid, motionless objects. Instead, they are flexible and dynamic.Composed of amino acids, they initially fold into a steady, three‐dimensional shape known as the native conformation — their baseline structure. But as a result of various bonding and dispersing forces, the different parts of proteins can move when they come into contact with other cellular components as well as through external influences, such as changes in pH or temperature. For example, the fingers of a polymerase protein can open and close, as would the fingers of a hand.
Conformational dynamics — the ability of different parts of a protein to move — allow them to efficiently administer many essential functions with a limited number of ingredients. A better understanding of polymerase conformational dynamics is the missing link between structures and functions, including whether a protein responds to a drug and whether it could become resistant to it down the road.
Unraveling the mystery
Many structural studies have captured DNA polymerases in various distinct conformations. However, a detailed understanding of the impact of polymerase conformational dynamics on drug resistance is lacking. To solve the puzzle, the researchers carried out a series of experiments, focusing on two common polymerase conformations — an open one and a closed one — to determine how each affects drug susceptibility.
First, using cryo-EM, they conducted structural analysis to get high-resolution visualizations of the atomic structures of HSV polymerase in multiple conformations, as well as when bound to the antiviral drugs acyclovir and foscarnet. The drug-bound structures revealed how the two drugs selectively bind polymerases that more readily adopt one conformation versus another. One of the drugs, foscarnet, works by trapping the fingers of the DNA polymerase so that they are stuck in a so-called closed configuration.
Further, structural analysis paired with computational simulations suggested that several mutations that are distant from the sites of drug binding confer antiviral resistance by altering the position of the polymerase fingers responsible for closing onto the drug to halt DNA replication.
The finding was an unexpected twist. Up until now, scientists have believed that polymerases closed partially only when they attached to DNA and closed fully only when they added a DNA building block, a deoxynucleotide. It turns out, however, that HSV polymerase can fully close just by being near DNA. This makes it easier for acyclovir and foscarnet to latch on and stop the polymerase from working, thus halting viral replication.
“I’ve worked on HSV polymerase and acyclovir resistance for 45 years. Back then I thought that resistance mutations would help us understand how the polymerase recognizes features of the natural molecules that the drugs mimic,” said study co-author Donald Coen, professor of biological chemistry and molecular pharmacology at HMS. “I’m delighted that this work shows that I was wrong and finally gives us at least one clear reason why HSV polymerase is selectively inhibited by the drug.”
Authorship, funding, disclosures
Additional authors included Sundaresh Shankar, Junhua Pan, Pan Yang, Yuemin Bian, Gábor Oroszlán, Zishuo Yu, Purba Mukherjee, David J. Filman, James M. Hogle, Mrinal Shekhar.
This work was supported by the National Institutes of Health (awards R21 AI141940 and R01 AI19838), with additional funding from a Centers for Integrated Solutions in Infectious Diseases grant.
What Enables Herpes Simplex Virus To Become Impervious to Drugs?
Source: Harvard Medical School
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Progress, Not Perfection: How Healthy Habits Can Stack Up One Step at a Time
The article emphasizes that achieving better health relies on progress, not perfection. It advocates for realistic goals and highlights tools like My Life Check for personalized health assessments. Small, manageable changes in diet, exercise, sleep, and stress management can significantly impact overall well-being, making healthy habits more attainable and sustainable.
Last Updated on April 1, 2026 by Daily News Staff
Progress, Not Perfection: How Healthy Habits Can Stack Up One Step at a Time
(Feature Impact) Despite the best of intentions, it’s common for plans to build healthier habits to fall flat. Often, the culprit isn’t a lack of motivation or discipline; rather, it’s unrealistic expectations.
Overhauling your lifestyle requires a level of commitment that isn’t always practical. Understanding your personal health needs and the challenges you need to overcome can help give you a more realistic roadmap toward better health.
Tools to Guide You
Every plan needs a starting point and there are many reputable sources that can help guide you toward a plan that addresses your personal health needs.
For example, the American Heart Association introduced My Life Check, a simple, free tool to help individuals understand their heart health and what’s driving it. Users answer simple questions about their daily habits and health factors to get a personalized Heart Health Score in minutes.
The results are private and downloadable, giving you full control of your information. The tool turns big goals into small, specific actions you can start right away. Knowing your numbers relative to your heart health (and where you are in comparison to target ranges for optimal health) can help you decide how to build a better map to get you where you want to be.
While the report is customized to each individual, no personal data is stored and answers are only used to calculate health scores and provide personalized recommendations and practical steps to improve your health, so you can use your results to focus on what matters most to you. Every small step you take, such as moving more, eating smarter, sleeping better or managing stress, can add up over time.
Finding Your Path
Once you’re armed with data and know where you stand on your heart health numbers, small steps become clearer and more manageable. That knowledge makes it easier to choose one area to focus on, such as getting more sleep, taking daily walks or adding more color to your meals.
Healthy changes don’t need to be expensive or complicated. The best habits are ones that fit real life when every action you take moves you closer to your goals.
Staying motivated and on track is also easier when you can check back in, see your progress and realize the steps you’re taking are making an impact. Checking in every few months to see how you can grow gives you the chance to celebrate your progress, learn from challenges and keep building lasting habits that feel good.
To get started with personalized tips to set your own health goals, visit heart.org/mylifecheck.
Healthy Habits for Everyday Life
Eat Smart
Choose foods that help you feel your best, one meal at a time. Add more color to your plate and focus on balance, not restriction. Simple, affordable swaps can make a real difference.
Smart Tip: Aim for an overall healthy eating pattern that includes whole foods, fruits and vegetables, lean protein, nuts, seeds and cooking in non-tropical oils such as olive and canola.
Move More
Find movement that fits your life, such as a walk, a stretch or dancing while you cook. Every bit of activity counts and it all supports your heart and mind. Move for joy, not just for results.
Smart Tip:Adults should get 150 minutes of moderate physical activity (or 75 minutes of vigorous activity) per week. Kids should aim for 60 minutes every day, including play and structured activities.
Sleep Well
Rest is a foundation of good health, not a reward. Protect your bedtime routine and give your body the recovery it deserves. Notice how good sleep makes everything else easier.
Smart Tip: Most adults need 7-9 hours of sleep each night. Children require more. Adequate sleep promotes healing, improves brain function and reduces the risk for chronic diseases.
Manage Stress
Check in with yourself regularly, both mentally and emotionally. Create simple moments to pause, breathe, laugh or step outside. Connection, kindness and calm all support a healthy heart.
Smart Tip:The first step to stress management is awareness. Step “away from yourself” for a moment. Objectively ask yourself, “Is my stress level too high?” If so, look at what might be causing that stress.
Ideas for Incremental Changes
- Dedicate 15 minutes at the beginning or end of the day to focus on self-care, whether it’s unwinding with some music, writing down your goals or reflecting on the highlights of the day.
- Aim to add an extra serving of fruits or veggies each day, such as creating a savory veggie omelet or exploring new smoothie blends that let you pack in the produce on the go.
- Give your cabinets a quick update and put the smaller plates front and center. When you use a smaller plate, you can fill it while still sticking to recommended serving sizes.
- If you’re not a fan of the gym, think about how your hobbies can play a role in your physical activity. Even gardening counts as physical activity, so get creative to get moving with an activity you truly enjoy.
- Establish a bedtime routine that allows you to ease into sleep more easily. Once you feel the impact of better-quality rest, you may find yourself more motivated to make a regular bedtime a priority.
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How to Practice Thoughtful Grief Etiquette Online
Grief experts advise caution in sharing condolences and loss-related information on social media, emphasizing the importance of prioritizing the grieving family’s needs. Thoughtful posting practices include waiting for family approval, reaching out privately first, and avoiding speculation about the cause of death. Compassionate communication is essential in these sensitive situations.
Last Updated on March 31, 2026 by Daily News Staff
(Feature Impact) News of a death can spread online in seconds – often before families have notified close family members privately. That’s why grief experts urge people to rethink how they share condolences, tributes and loss-related information on social media, particularly during the winter months when grief can feel especially isolating.
“Grief etiquette is about putting the needs of the grieving family first, not our urge to say something publicly,” said Dr. Camelia L. Clarke, National Funeral Directors Association (NFDA) spokesperson, funeral director and grief educator with nearly 30 years of experience. “Just because information can be shared instantly doesn’t mean it should be.”
Social media has become a common place for sharing condolences, tributes and memories. However, grief experts caution that, without thoughtful consideration, online posts can unintentionally cause harm. Knowing when to post, what to say and when to remain silent can make a meaningful difference for families experiencing loss.
Consider this advice from the experts at the NFDA.
Grief Etiquette in the Digital Age
Grief etiquette refers to the unspoken guidelines for how individuals acknowledge death, loss and mourning, particularly online.
According to Clarke, one of the most important principles is restraint.
“When a death is shared online too quickly, families can feel exposed and overwhelmed at a moment when they’re still processing the loss themselves,” she said. “Waiting is an act of compassion.”
Best Practices for Posting About Loss Online
As social media continues to play a role in modern mourning, grief professionals encourage users to pause before posting and consider a few key guidelines:
- Let the family lead. Don’t post about a death until the immediate family has made it public.
- Ask permission. Obtain consent before sharing photos, stories or tributes.
- Reach out privately first. A direct message, call or handwritten note can be more meaningful than a public comment.
- Avoid speculation. Don’t ask about or share details regarding the cause of death.
- Offer ongoing support. Grief extends far beyond the first days or weeks after a loss.
What to Say (and Avoid)
When expressing condolences online, experts recommend simplicity, sincerity and sensitivity. Messages that acknowledge loss without attempting to explain or minimize it are often the most supportive.
Helpful phrases include:
- “I’m sorry for your loss.”
- “Thinking of you and your family.”
- “I’m here if you want to talk or need anything.”
By contrast, well-meaning cliches can unintentionally cause harm. Phrases such as “They’re in a better place” or “Everything happens for a reason” may reflect the speaker’s beliefs, but they can feel dismissive to someone grieving.
“Grieving people don’t need answers – they need presence,” Clarke said. “Listening matters more than saying the perfect thing.”
Resources for Families and Friends
As digital spaces continue to shape how people communicate during life’s most difficult moments, experts agree empathy, patience and respect remain timeless.
“Grief is deeply personal,” Clarke said. “When we slow down and lead with compassion, we honor both the person who has died and those who are left to grieve.”
To learn more about how to support a grieving person and access free, expert-reviewed resources for navigating grief, expressing condolences and supporting loved ones before, during and after a loss, visit RememberingALife.com, an initiative of the NFDA.
Photo courtesy of Shutterstock
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Last Updated on March 27, 2026 by Daily News Staff
4 Simple Ways to Keep Allergy Season at Bay
(Family Features) With warmer outdoor temperatures, many homeowners suffer through longer allergy seasons. In fact, allergy days have increased by 20 days, according to a study conducted by the National Academy of Sciences.
Being aware of air quality indexes and limiting time outdoors can lessen exposure to airborne pollutants, but indoor air quality is also a concern. In a report from the U.S. Environmental Protection Agency, levels of indoor pollutants can be 2-5 times higher than outdoor air.
People spend nearly two-thirds of their lives at home, according to Carrier, which developed its Healthy Homes Program to help homeowners create indoor environments that optimize health and wellness. Consider these ways you can combat pollutants where it matters most: your home’s indoor air quality.
Reduce Indoor Pollutants
Your home has multiple sources of indoor air pollutants. While avoiding these pollutants altogether is often the best solution, it’s not always possible. However, there are a few ways you can reduce exposure in your home: ban indoor smoking; turn on exhaust fans when cooking; minimize or remove “soft” pollutant gathering surfaces such as decorative pillows, stuffed animals and decorative throws; and regularly clean all heating and air conditioner filters as required or according to manufacturer specifications.
Add Air Purifiers to Your HVAC Unit
While air purifiers don’t treat allergies, they can help filter out allergens that can cause allergy symptoms. Homeowners might consider purifiers that are highly effective at capturing particulate. For example, the Carrier Infinity air purifier is a whole-home heating and cooling system. It not only captures 95% of particles in micron size range 1.0-3.0, but also inactivates 99% of select airborne germs and viruses that flow through the HVAC system and become trapped in the MERV 15 filter. The purifier has also demonstrated effectiveness against the murine coronavirus – similar to the human novel coronavirus (SARS-CoV-2) that causes COVID-19 – based on third-party testing, as well as the type of viruses that cause the common cold, streptococcus pyogenes and influenza.
Control Humidity
Many people know high humidity can cause discomfort in hot temperatures, but there are other potentially negative impacts. According to the Centers for Disease Control and Prevention, dust mites thrive in 70-80% humidity and temperatures between 75-85 F. Additionally, high humidity can provide an environment conducive to mold growth, which is why maintaining relative indoor humidity between 40-60% is recommended to keep dust mites and mold at bay. To help control humidity, run the air conditioner when it’s hot and humid and consider using whole-home humidifiers and dehumidifiers that allow for specific settings for moisture control.
Consider Room Air Purifiers for Individual Spaces
Room air purifiers are portable and highly efficient solutions for smaller spaces such as nurseries, bedrooms, home gyms and added rooms. One example is the Carrier Smart Room Air Purifier with a built-in indoor air quality monitor that includes three levels of filtration, including an activated carbon filter to capture odors. The attached, color-coded air quality monitor measures and displays pollutant levels so homeowners can be informed and aware of the quality of their indoor air, giving them the ability to maintain next-level comfort while breathing cleaner air.
Creating your ideal home environment is more than just controlling the temperature. Your home’s air should be filtered and pollutants limited to minimize allergy triggers and promote good indoor air quality.
To learn more and get an estimate on a solution that’s right for you, visit carrier.com/residential.
SOURCE:
Carrier
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