Comment

Comment by Dr. Krishna Kumari Challa on Friday

Cancer cells are better able to resist treatments when they have an abnormal number of chromosomes
Cancer cells with abnormal chromosome numbers (aneuploidy) exhibit reduced levels of PARP1 protein, impairing a cell death pathway triggered by oxidative DNA damage and enhancing resistance to treatment-induced stress. This mechanism enables aneuploid cancer cells to survive and spread more effectively, with metastatic tumors showing lower PARP1 levels than primary tumors.

Pan Cheng et al, PARP1 suppression drives ROS resistance in aneuploid cancer cells, Molecular Cell (2026). DOI: 10.1016/j.molcel.2026.04.006

Comment by Dr. Krishna Kumari Challa on Friday

New study challenges the inevitability of cognitive decline and proves that brain gain is possible at any age

A study recently published in Scientific Reports reveals that cognitive decline is not an inevitable part of aging.
Longitudinal data from nearly 4,000 adults aged 19–94 show that cognitive performance can improve at any age through consistent, targeted brain-healthy practices. Gains were observed across all baseline levels, with the greatest improvements in those starting with lower scores, and no upper limit to brain health optimization was detected. Small, daily interventions correlated with higher brain health scores, and improvements were consistent across age groups, indicating that cognitive decline is not inevitable. Brain health was also shown to be resilient and trainable, even during major life stressors.
Key research findings:

No ceiling for improvement: Significant gains in brain health were observed across the board. Even top-tier performers continued to improve over 1,000 days, suggesting there is no known limit to brain optimization.
The low-starter advantage: Participants who entered the study with the lowest baseline scores demonstrated the most significant rates of improvement, demonstrating that poor brain health is not a life sentence.
Small habit changes make a big difference: Gains were directly correlated with consistency of utilization. Participants who engaged the most in 5 to 15 minutes of daily micro-training and adopted brain-healthy habits in their everyday lives achieved the highest brain health scores.
Universal potential at any age: Younger adults saw gains equal to those in their 70s and 80s, debunking the myth that proactive brain health is only for seniors.

Lori G. Cook et al, Measuring and increasing the brain health span across adulthood: a public health imperative, Scientific Reports (2026). DOI: 10.1038/s41598-026-51403-3

Comment by Dr. Krishna Kumari Challa on Friday

Hidden sex differences may explain why lupus strikes women far more often

Analysis of over 1.25 million immune cells from nearly 1,000 individuals identified more than 1,000 sex-specific genetic switches, primarily on autosomes, that regulate immune cell activity differently in males and females. Females showed higher inflammatory pathway activity, linked to increased autoimmune disease risk, including lupus, while males had more monocytes and less inflammatory priming. These findings highlight the need for sex-specific approaches in autoimmune disease research and treatment.

https://medicalxpress.com/news/2026-05-hidden-sex-differences-lupus...

Comment by Dr. Krishna Kumari Challa on Friday

Ultrasound waves rupture COVID-19 and flu viruses without damaging cells

Researchers have discovered that high-frequency ultrasound waves similar to those used in medical exams can eliminate viruses such as SARS-CoV-2 and H1N1 without damaging human cells. In an article published in Scientific Reports, they describe how the phenomenon, known as acoustic resonance, causes structural changes in viral particles until they rupture and become inactivated.
By degrading the structure of the pathogen, the protective membrane of the virus called the envelope bursts and deforms, preventing the virus from invading human cells

High-frequency ultrasound waves (3–20 MHz) induce acoustic resonance in spherical, enveloped viruses such as SARS-CoV-2 and H1N1, causing structural rupture and inactivation without damaging human cells. The effect is geometry-dependent and not influenced by viral mutations. This selective mechanism offers a potential antiviral strategy distinct from existing decontamination methods.
Ultrasound-mediated inactivation of enveloped viruses opens up a new treatment possibility for viral diseases.
The discovery surprised the researchers because it contradicts classical physics theories, as the wavelength of ultrasound is much longer than the size of the virus. In theory, this difference in size would prevent interaction.

The phenomenon is entirely geometric. Spherical particles, such as many enveloped viruses, absorb ultrasound wave energy more effectively. It's that accumulation of energy inside the particle that causes changes in the structure of the viral envelope until it ruptures. Therefore, if viruses were triangular or square, they wouldn't undergo the same 'popcorn effect' of acoustic resonance.
Since the process depends strictly on the shape of the viral particle and not on genetic mutations, variants such as those observed during the pandemic (omicron and delta, for example) do not affect the effectiveness of the technique.

Flavio P. Veras et al, Ultrasound effectively destabilizes and disrupts the structural integrity of enveloped respiratory viruses, Scientific Reports (2026). DOI: 10.1038/s41598-026-37584-x

Naruna E. Rodrigues et al, Trapped Acoustic Energy and Resonances in Spherical Scatterers, Brazilian Journal of Physics (2026). DOI: 10.1007/s13538-026-02020-y

Comment by Dr. Krishna Kumari Challa on Friday

Crash data reveal women face 60% higher injury risk than men

Women have a 60% higher risk of injury in car accidents compared to men, with the disparity especially pronounced among female passengers and older women. Current vehicle safety systems and test standards, based on male body models, inadequately protect women due to anatomical and biomechanical differences. Recommendations include developing adaptive safety systems, using more realistic human models in testing, and improving occupant education on proper seat and belt positioning.

https://www.bmimi.gv.at/verkehrssicherheit/beratung-foerderung/vsf/...

Comment by Dr. Krishna Kumari Challa on Friday

While the sight is mesmerizing, it may be a "trap" caused by human activity. The researchers noted that the sex ratio, mostly females, many of whom were carrying eggs, suggests this isn't a mating ritual. Instead, it appears to be a disruption of their natural instincts caused by artificial light at night (ALAN).

These "isopod mills" may have dire consequences. In one observation, a centipede was seen preying on the distracted, swirling mass. By drawing these creatures out of their natural shelters and trapping them in a loop, light pollution may be making them easy targets for predators and wasting the energy they need for survival.

The study highlights how even small changes in our environment, like the installation of a streetlight, can fundamentally alter the ancient behavioural patterns of the world's smallest inhabitants.

Idan Sheizaf et al, A Novel Light‐Induced Collective Circular Movement in Armadillo sordidus Isopods, Ecology and Evolution (2026). DOI: 10.1002/ece3.73487

Part 2

Comment by Dr. Krishna Kumari Challa on Friday

Streetlights trigger bizarre 'death spirals' in thousands of isopods, scientists find

A new study  has documented a never-before-seen behavioural phenomenon: thousands of land-dwelling isopods forming massive, synchronized circular processions. This behaviour appears to be an unintended consequence of artificial light at night.

The study, published in Ecology and Evolution, explores how these small creatures, terrestrial relatives of crabs and shrimp, also known as "woodlice" or "pill bugs," abandon their typical solitary lives in sheltered areas to join swirling "mills" that can include over 5,000 individuals in a single group.

To understand what was driving this strange behavior, the team tested several environmental factors, including magnetic fields and different types of light:
Magnetism: Because the Golan Heights has unique magnetic properties, the team placed strong magnets near the isopods to see if it disrupted their pathing. The isopods showed no reaction, maintaining their circular march.
Ultraviolet light: Testing with UV flashlights attracted only a small fraction of the population and failed to trigger any circular movement.
White light: This proved to be the "smoking gun." When a white lamp was placed perpendicular to the ground, it consistently induced the mass circular motion.
The researchers discovered that the geometry of the light is the key. A vertical light beam creates a circular "boundary" of illumination on the ground. The isopods, attracted to the light, begin walking along this photic edge. Once the population density hits a certain threshold, the individual movements turn into a collective, self-sustaining swirl.

part 1

Comment by Dr. Krishna Kumari Challa on Thursday

Chronic sunlight exposure can disrupt body clocks in skin

Years of chronic exposure of human skin to sunlight strongly disrupts its body-clock rhythm, according to a pioneering study

Chronic sunlight exposure disrupts the circadian rhythms of human skin, weakening the temporal coordination of gene activity, particularly those involved in DNA repair. Sun-exposed skin shows altered daily gene expression patterns and reduced rhythmicity compared to protected skin, which may contribute to photoaging and impaired skin health. These findings suggest that skin chronobiology is significantly affected by long-term UV exposure.

The findings could explain how ultraviolet (UV) light triggers inflammation and damage in exposed skin, so-called photoaging, which breaks down its supportive structure, altering how its cells behave.

Published in the Journal of Investigative Dermatology, the study could have important implications on skin health and the design of skincare products that takes into account the time of day when they are applied.

The study is the first to directly compare daily rhythms of genes being turned on and off in human skin exposed to and protected from sunlight over half a century.

Almost all organs—including skin—exhibit 24 hourly rhythms which allows the body to anticipate and adapt to changes associated with the light-dark cycle, including daily exposure to solar radiation.

Michael M. Saint-Antoine et al, Comparative circadian transcriptome analysis reveals dampened and phase-advanced rhythms in sun-exposed human skin, Journal of Investigative Dermatology (2026). DOI: 10.1016/j.jid.2026.03.038

Comment by Dr. Krishna Kumari Challa on Thursday

Fewer insects, fewer nutritious crops: Pollinator decline puts human health at risk

Biodiversity loss is directly threatening human health and welfare, according to new research.
It's long been known that insect pollinators are vital for producing many of the fruits, vegetables and pulses that supply essential vitamins and minerals in our diets.

Declines in insect pollinators significantly reduce crop yields, leading to lower intake of essential nutrients such as vitamin A, folate, and vitamin E, and decrease farming income, thereby increasing risks of malnutrition, illness, and poverty among smallholder farmers. Supporting pollinator populations through local actions like planting wildflowers and reducing pesticide use can enhance both nutrition and economic resilience, highlighting the critical link between biodiversity and human health.

Working in ten smallholder farming villages and their surrounding landscapes in Nepal, the study traced the full chain of connections between wild pollinators, crop yields and the nutrients families rely on.

By tracking diets, crop nutrients and the insects visiting those crops over a year, the research team showed how pollinators directly support both nutrition and livelihoods.

The study found insect pollinators are crucial for both the nutrition and income of farming families, and pollinators were responsible for 44% of people's farming income and contributed more than 20% of their intake of vitamin A, folate and vitamin E.

When pollinators decline, families risk poorer nutrition, leading to higher vulnerability to illness and infections, and deeper cycles of poverty and poor health. One quarter of the global population currently suffers from this "hidden hunger."

The research showed there is real potential for positive change—when communities support pollinators, their nutrition and income can improve. Simple steps like planting wildflowers, using fewer pesticides or keeping native bees can help boost pollinator numbers, strengthening both nature and people's well-being.

Thomas Timberlake, Pollinators support the nutrition and income of vulnerable communities, Nature (2026). DOI: 10.1038/s41586-026-10421-x. www.nature.com/articles/s41586-026-10421-x

Comment by Dr. Krishna Kumari Challa on Thursday

Light without electricity? Glowing algae could make it possible

Bioluminescent algae Pyrocystis lunula can be chemically stimulated to emit sustained light for up to 25 minutes, especially under acidic conditions. Embedding these algae in hydrogels and 3D-printing them into structures enables long-lasting, controllable luminescence, with algae retaining 75% brightness after four weeks. This approach offers potential for sustainable lighting, environmental sensing, and carbon sequestration.
Researchers exposed the algae to an acidic solution with a pH of 4, similar to that of tomato juice, and a basic solution with a pH of 10, comparable to mild soap.

They found that both environments could trigger light production in P. lunula. In the acidic condition, the algae could stay aglow for as long as 25 minutes, with light appearing bright and concentrated. In the basic condition, the glow was more diffused and short-lived.
To turn these glowing algae into usable materials, the researchers embedded them into a naturally derived hydrogel, a type of water-based gel material. They then used 3D printing to shape the material into structures and shapes, from a crescent pattern to a CU Buffalo logo.

By exposing the structures to the acidic or basic solution, they prompted the P. lunula inside to emit light, illuminating the entire structure in a blue glow.

Inside these printed structures, the algae remained alive for weeks. The acidic condition worked best, with P. lunula in these 3D-printed structures retaining 75% of their brightness even after four weeks.
The findings could have wide applications beyond making eye-catching designs. These living materials could someday help light up autonomous robots for deep-sea or space exploration without the need for batteries.

Chemical Stimulation Sustains Bioluminescence of Living Light Materials, Science Advances (2026). DOI: 10.1126/sciadv.aee3907

• ‹ Previous
• 1
• 2
• 3
• 4
• …
• 1228
• Next ›
• Page