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In individuals with chronic obstructive pulmonary disease, or COPD, utilising portable home air purifiers can improve several markers of cardiovascular health, according to the results of a six-month study led by researchers at Johns Hopkins Medicine.

People with COPD frequently experience chest tightness, persistent coughing, and shortness of breath. According to the World Health Organization, COPD and cardiovascular disease are two of the top causes of mortality worldwide. Cardiovascular illnesses include arrhythmias, heart failure, stroke, and heart attack frequently coexist with COPD.

The new research, described online Oct. 26 in the American Journal of Respiratory and Critical Care Medicine, is a secondary study of a larger Johns Hopkins-led project, the CLEAN AIR study. The CLEAN AIR study, which investigated the effects of indoor air pollution on COPD, found that people with COPD experienced improved symptoms after using portable air purifiers indoors.

“We’ve seen that air pollution in the home, where people spend a majority of their time, contributes to impairments in respiratory health. We hypothesized this pollution is a big driver of cardiovascular disease and cardiac events in people with COPD,” says lead author Sarath Raju, M.D., M.P.H., an assistant professor of medicine who specializes in obstructive lung diseases at the Johns Hopkins University School of Medicine.

Researchers recruited 85 men and women from the original CLEAN AIR study, who were adults (average age 65) with COPD. The participants lived primarily in the Baltimore area.

First, researchers had trained technicians take air samples of indoor particulate matter of varying sizes from participants’ homes. These indoor air pollutants are composed of such things as mold and pet dander. One of the tiniest kinds of particulate matter, PM 2.5 — smaller than the diameter of a human hair — can be detrimental to respiratory and heart health by infiltrating the bloodstream through the lungs and causing inflammation. The level of PM 2.5 indoors should stay at or below 12 micrograms per cubic foot for the air to be considered healthy to breathe. Participants’ homes had an average of 13.8 micrograms per cubic foot of PM 2.5.

Then, 46 randomized participants received two portable air cleaners with HEPA and carbon filters to use at home; the other participants received placebo air cleaners that circulated air but had the filters removed.

Researchers tracked and measured several indicators of lung and heart health at the one week, three-month and six-month periods of the study using standard clinical tests, such as blood pressure and heart ultrasounds (echocardiograms).

Additionally, participants wore heart rate monitors for 24 hours during each clinical testing period, to assess heart rate variability.

At the end of the experiment, all 46 participants with active HEPA and carbon filters had improved markers of heart health, specifically a 25% increase in heart rate variability. Participants without the active filters saw no increase.

Heart rate variability, or HRV, is a common measure of heart health calculated using other statistical variables, such as the standard deviation between heart beats. HRV consists of changes in the time intervals between consecutive heart beats. A healthy heart is constantly adjusting its rate to meet the body’s physical demands, and as such, has a higher heart rate variability.

Among 20 participants who used the air purifiers with active filters 100% of the time while at home, there was also a 105.7% increase in a heart health variability measure called the root mean square of successive differences between normal heartbeats, or RMSSD, which is associated with improved heart fitness.

The team also looked at the effects of ultrafine particles in the homes. These particles, smaller than a thousandth of a millimeter or one micron, are able to travel to the deepest part of the lungs when inhaled, and can even cross into the bloodstream.

In their evaluation of 29 participants and their homes, the researchers uncovered a correlation between an increase in ultrafine particles and poorer heart health markers, such as lower heart rate variability. The team says more research must be done in this area.

“Ultrafine particles might be the most potent particles in terms of health consequences,” says study author Meredith McCormack, M.D., M.H.S., associate professor of medicine at the Johns Hopkins University School of Medicine and director of the BREATHE Center (Bridging Research, Lung Health and the Environment). “These particles and other indoor air pollutants can cause systemic inflammation in susceptible patients like those with COPD. Our study shows there’s a negative impact on cardiovascular health, as well.”

“In the future, air cleaners may be something to recommend to patients along with medications, but also can be part of a larger discussion about the importance of home environments,” says Raju.

The need for testosterone treatment has increased in the US. The strengthening of virility and an increase in power and vitality are two examples of motivations. With multiple direct-to-customer channels now selling the therapy, it has developed into a full-fledged industry.

In spite of this, patients should be aware of the therapy’s potential hazards before beginning treatment.

And according to a new study published in the journal named “JAMA Internal Medicine”, not many of these platforms are providing the appropriate guidelines for its safe and effective usage on men. “Testing and treatment for low testosterone is more accessible than ever before thanks to these online platforms. Men can be evaluated and even start testosterone therapy without leaving home,” said Joshua A. Halpern, MD, senior author on the paper and urologist at Northwestern Medicine. “While there’s benefit in improving access, there’s also potential for harm when providers fail to follow evidence-based guidelines, or when the benefits and risks of treatment are not appropriately communicated.”

Men with low testosterone levels, or hypogonadism, may experience symptoms such as erectile dysfunction, decreased libido, fatigue, and depression among other issues. While therapy to increase the hormone can improve these symptoms for some, it can be ineffective or even harmful when prescribed to men who don’t meet the criteria for hypogonadism including increased risk for infertility and cardiovascular events, as well as other side effects.

Using a secret shopper, the study authors evaluated seven US-based online companies that provide testosterone therapy in all 50 states. Utilizing a script to inquire about and initiate testosterone therapy, the secret shopper identified himself as a 34-year-old man with hypogonadal symptoms, including low energy and low libido, who was interested in future fertility.

For each of the platforms, he completed the intake evaluation, required laboratory diagnostic testing and initial telemedicine consultation, which was conducted by either a nurse practitioner, physician assistant or non-medically licensed individual.

“While my interactions with the telemedicine platforms were pleasant and efficient, I was surprised by some of the gaps in their counseling and their recommendations that I pursue testosterone therapy,” said Justin Dubin, MD first author and secret shopper of the study.

The authors found that online platforms are offering therapies to men who do not meet guidelines for testosterone deficiency, while also failing to convey the risks and benefits of therapy. The study is the first to identify guideline-discordant practices by direct-to-consumer testosterone therapy platforms, with the following key findings:
85.7% of the platforms offered testosterone therapy despite the secret shopper having normal total testosterone (TT) and free testosterone levels and desiring future fertility.

Only 1 of the 7 platforms asked the secret shopper about recent cardiovascular events or his desire for future fertility.
Criteria for offering testosterone therapy were discordant with AUA and ES guidelines with one platform only offering treatment for men with TT below 450 ng/dL (normal range = 264 – 916 ng/dL), while the other six have no threshold for treatment initiation.

Half of the platforms quoted a treatment goal of more than 1,000 ng/dL TT levels and did not discuss fertility risks of testosterone therapy.

83.3% did not discuss the risks of polycythemia, which is an increase in blood thickness.

In addition to testosterone therapy, the secret shopper was also offered a broad range of off-label medications.

As the popularity of direct-to-consumer testosterone therapy grows, the authors hope that future policy initiatives will facilitate more consistent and guideline-based care by these entities.

“Online platforms have great potential for expanding access to men’s healthcare screenings and treatments, especially for issues like erectile dysfunction and infertility,” says Dr. Halpern. “However, until these services are providing therapies based on established guidelines, it’s important than patients and providers are educated on the potential pitfalls of seeking this type of treatment online.”

For men with concerns about their testosterone levels, Dr. Halpern recommends seeing a provider with expertise in hypogonadism, such as a urologist, endocrinologist, or even beginning with their primary care physician. For some men, lifestyle modifications alone may improve their physical symptoms and enhance mood.

“Testosterone isn’t a magical solution, but it can be a very effective therapy when prescribed appropriately and within guidelines,” says Dr. Halpern. “For others, making lifestyle choices that emphasize exercise, healthy eating and adequate sleep, may be the right answer. Working with an experienced provider is the first step to finding the right, individualized care plan to fit your personal needs.”

The Northwestern Medicine Urology Program is among the most renowned and experienced in the country. It offers complete inpatient and outpatient care, as well as cutting-edge diagnostic and therapeutic options for adults, children, and adolescents.

According to a recent study, younger adults who adopt proactive measures to deal with stress are better able to prevent those harmful health consequences.

The study was published in the journal, ‘Forecasting’. “The fact that we have two studies with the same results highlights the importance of proactive coping for younger adults when it comes to handling stress,” says Shevaun Neupert, corresponding author of a paper on the two studies and a professor of psychology at North Carolina State University.

“These results are important for helping us work with people to build resilience, since proactive coping refers to skills that can be taught. The findings also suggest that younger adults, in particular, can benefit significantly from these skills.”

Proactive coping is an umbrella term for behaviors that allow people to avoid future stressors or prepare themselves to respond to those stressors. These can be behavioral, such as saving money to deal with unexpected expenses, or cognitive, such as visualizing how to deal with potential challenges.

“You can also think of proactive coping as a way of helping people continue to work toward their goals, even when dealing with challenges,” Neupert says.

The first of the two studies focused on skills that allowed people to concentrate on their goals when dealing with stressors.

For this study, the researchers enlisted 223 people: 107 younger adults (ages 18-36) and 116 older adults (ages 60-90). Study participants completed an initial survey that focused on understanding goal-oriented proactive coping behaviors that the participants engaged in. The participants then completed daily surveys for the next eight days, recording the stressors they experienced each day, as well as their physical health symptoms.

“We found that younger adults who consistently engaged in proactive coping, such as thinking about what they need in order to be successful, experienced fewer negative physical health symptoms on stressful days,” Neupert says. “However, there was no positive or negative effect of proactive coping for older adults.”

The second research concentrated on actions taken to mitigate or minimise stresses. 140 participants between the ages of 19 and 86 were recruited by the researchers for this study. Participants in the study completed a baseline survey to record their proactive coping strategies for stress management. Following that, the study subjects responded to daily questionnaires for a total of 29 days, disclosing their daily stresses and physical well-being.

In this study, the researchers discovered that, compared to adults in the same age range who engage in less proactive coping, those adults between the ages of 19 and 36 who engaged in proactive coping reported little to no drop-off in physical health on stressful days. Proactive coping, like the previous trial, had no impact on older persons.

“The effects in the both studies were linear, so the more proactive coping younger adults engaged in, the better their physical health on stressful days,” Neupert says.

“These findings suggest there is tremendous value in teaching young people how to engage in proactive coping, starting with college-age young adults, but extending through to people who are established in adulthood.”

Researchers at Cedars-Sinai Medical Center have discovered that women who experience persistent mental health issues up to three years after giving birth may experience abnormal immune system responses.

The findings are published in the American Journal of Reproductive Immunology. “We found that women who had clinically elevated symptoms of depression, anxiety, and/or post-traumatic stress disorder (PTSD) two to three years after delivery had genetic evidence of a higher prevalence of immune system defense mechanism activation,” said Eynav Accortt, PhD, principal investigator of the study and director of the Reproductive Psychology Program at Cedars-Sinai.

“These women also appeared to have a reduction in the activity of genes related to antiviral immune responses that can offer the body protection from pathogens,” said Accortt, a clinical psychologist.

According to the Centers for Disease Control and Prevention, about 1 in 8 women experience significant symptoms of perinatal mood and anxiety disorders that can interfere with overall health, daily activities and family life. Much of the research into maternal mental health to date has focused on the perinatal period and the first year after childbirth.

Cedars-Sinai investigators surveyed 33 women about their mental health over a longer period, two to three years after giving birth. Study participants also provided a blood sample, and scientists performed bioinformatic analyses of differential gene expression.

“Delayed or persistent postpartum anxiety, depression and PTSD is an area that is woefully understudied,” said Sarah Kilpatrick, MD, PhD, chair of the Department of Obstetrics and Gynecology at Cedars-Sinai and one of the study’s co-authors.

“In this preliminary research, we have identified genetic differences related to inflammation when comparing women experiencing prolonged symptoms of mood and anxiety disorders to those who did not report poor mental health. Additional studies will be needed for a deeper dive into the role inflammation may play in postpartum mental illness,” said Kilpatrick.

A primary goal of this work is to design a blood test that would detect which women are at the highest risk for serious and prolonged postpartum mood disorders, according to Accortt.

“A blood test could help us develop early interventions that provide medical and mental health treatments and support. We want to figure out why some women are at greater risk for depression, anxiety and PTSD. No one should have to suffer for years after childbirth,” said Accortt.

Each and every individual has a complicated genome. With numerous variances within each individual, it is comparable to three billion letters of code. Perhaps it is impossible for a human to sit and evaluate all that code.

However, according to a research published in the journal named “Nature Machine Intelligence”, Artificial Intelligence has the ability to spot things that humans may miss through billions of codings. Someday, AI-powered genome readers may even be able to predict the incidence of diseases from cancer to the common cold. Unfortunately, AI’s recent popularity surge has led to a bottleneck in innovation. “It’s like the Wild West right now. Everyone’s just doing whatever the hell they want,” says Cold Spring Harbor Laboratory (CSHL) Assistant Professor Peter Koo. Just like Frankenstein’s monster was a mix of different parts, AI researchers are constantly building new algorithms from various sources. And it’s difficult to judge whether their creations will be good or bad. After all, how can scientists judge “good” and “bad” when dealing with computations that are beyond human capabilities?

That’s where GOPHER, the Koo lab’s newest invention, comes in. GOPHER (short for GenOmic Profile-model compreHensive EvaluatoR) is a new method that helps researchers identify the most efficient AI programs to analyze the genome. “We created a framework where you can compare the algorithms more systematically,” explains Ziqi Tang, a graduate student in Koo’s laboratory.

GOPHER judges AI programs on several criteria: how well they learn the biology of our genome, how accurately they predict important patterns and features, their ability to handle background noise, and how interpretable their decisions are. “AI are these powerful algorithms that are solving questions for us,” says Tang. But, she notes: “One of the major issues with them is that we don’t know how they came up with these answers.”

GOPHER helped Koo and his team dig up the parts of AI algorithms that drive reliability, performance, and accuracy. The findings help define the key building blocks for constructing the most efficient AI algorithms going forward. “We hope this will help people in the future who are new to the field,” says Shushan Toneyan, another graduate student at the Koo lab.

Imagine having a health issue and being able to pinpoint it with the touch of a button. This science fiction cliché may one day become a standard fixture in every doctor’s office thanks to AI. Artificial intelligence (AI) programmes may recognise distinctive features of our genome that result in individualised medicine and treatments, much like video-streaming algorithms that learn users’ preferences based on their viewing history. The Koo team is hoping that GOPHER will aid in refining such AI algorithms so that we can be confident they are picking up the right information for the right purposes.

Toneyan says: “If the algorithm is making predictions for the wrong reasons, they’re not going to be helpful.”

A US-based scientist who formerly worked at a contentious research facility in Wuhan, China, has claimed that COVID-19 was a “man-made virus” that escaped from the establishment.
According to the New York Post, which cited a remark made by US-based researcher Andrew Huff in the British daily The Sun, COVID was released from Wuhan Institute of Virology (WIV), a state-funded and managed research centre, two years ago. Epidemiologist Huff argues that the epidemic was brought on by the US government’s support of coronaviruses in China in his most recent book, “The Truth About Wuhan.” Huff’s book excerpts have appeared in the UK tabloid The Sun.

Huff is a former vice president of the EcoHealth Alliance, a New York-based non-profit organisation that researches infectious illnesses, according to the New York Post article.

According to the New York Post, Huff asserts in his book that China’s gain-of-function studies were carried out with insufficient security, leading to a leak at the Wuhan lab.

With both Chinese government authorities and lab staff disputing that the virus originated there, the Wuhan facility has been the focus of contentious discussions on the origins of COVID.

“Foreign laboratories did not have the adequate control measures in place for ensuring proper biosafety, biosecurity, and risk management, ultimately resulting in the lab leak at the Wuhan Institute of Virology,” Andrew Huff, said in his book.

The organisation has established tight relations with the Wuhan lab and has been researching several coronaviruses in bats for more than ten years with support from the National Institutes of Health (NIH).

The NIH is the main US government organisation in charge of biological and public health research.
During his tenure with EcoHealth Alliance, which spanned 2014 to 2016, Huff said that the organisation helped the Wuhan lab for years to build the “best existing methods to engineer bat coronaviruses to attack other species”
“China knew from day one that this was a genetically engineered agent,” Huff wrote. ”

The transfer of risky biotechnology to China is the responsibility of the US government. “I was terrified by what I saw,” he told The Sun, as per New York Post. “We were just handing them bioweapon technology.”

The Post also notes that the WIV is where China’s riskiest coronavirus research is conducted, per a recent investigation by ProPublica/Vanity Fair. The Chinese Communist Party, which is in power, has put great pressure on this research organisation to advance science despite its limited funding in order to boost its stature internationally.

Researchers from the University of South Australia are urging people to prioritise getting a good night’s sleep as the Christmas season gets underway since recent findings suggest that sleep problems may be linked to type 2 diabetes risk factors.

In the first study of its kind, researchers discovered that persons with sleep issues were generally more likely to have inflammatory markers, high cholesterol, and body weight, all of which are risk factors for type 2 diabetes. Nearly a million persons in Australia have type 2 diabetes. More than 422 million individuals throughout the world have type 2 diabetes.

“Everyone knows that sleep is important. But when we think about sleep, we mainly focus on how many hours of sleep we get, when we should also be looking at our sleep experience as a whole,” Dr Matricciani says.
“How soundly we sleep, when we go to bed and get up, and how regular our sleep habits are, may be just as important as sleep duration.”
“In this study, we examined the association of different aspects of sleep, and risk factors for diabetes, and found a connection between those who had troubled sleep and those who were at risk of type 2 diabetes.”

Different facets of sleep are connected to diabetes risk factors, according to Dr. Lisa Matricciani of the University of South Australia.

“People who reported having trouble sleeping were also more likely to have a higher body mass index, as well as blood markers of cholesterol and inflammation,” Dr Matricciani says.
He added, “When it comes down to the crunch, we know we must prioritise our sleep to help stay in good health. More research is needed, but as this study shows, it’s important to think about sleep as a whole, not just as one aspect.”

More than 1,000 Australian individuals with a median age of 44.8 years were evaluated for the study. Self-reported difficulty sleeping, duration, timing, efficiency, and day-to-day variations in sleep length were all factors that researchers looked at.

Emergency visits for stroke are increased during a heatwave, according to study presented at ESC Asia, a scientific conference organised by the European Society of Cardiology (ESC), the Asian Pacific Society of Cardiology (APSC), and the Asean Federation of Cardiology (AFC).

“Climate change and global warming are worldwide problems and stroke is a leading cause of death,” said study author Dr Ryohei Fujimoto of Tsuyama Central Hospital and Department of Epidemiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan.
“Our study indicates that older adults may be more susceptible to stroke after exposure to hot weather. Preventative measures such as insulated housing and air conditioning should be considered a public health priority to protect people from this debilitating and life-threatening disease.”

The impact of high temperatures on the risk of stroke is not well understood. This study looked at the connection between elderly people’s emergency room visits for stroke and heat exposure. 3,367 citizens of Okayama, a city in Western Japan, participated in the survey. Between 2012 and 2019, participants who were 65 years of age or older were sent to emergency hospitals for strokes that began during and many months following the rainy season.

The Okayama weather station, which is operated by the Japan Meteorological Agency and the Okayama Prefectural Government, provided hourly data on outdoor temperature, relative humidity, barometric pressure, and the average atmospheric concentration of particulate matter smaller than 2.5 mm in diameter (PM2.5).

Analysis of the relationship between temperature and stroke was done during the rainy season as well as one, two, and three months later. For each participant, the researchers utilised a time-stratified case-crossover study design to compare the temperature on the day of the week a stroke occurred (for example, Monday) with the temperature on the same day of the week without strokes (for example, all other Mondays in the same month).

By doing this, the possible impacts of individual traits, long-term temporal trends, seasonality, and day of the week were avoided. One month following the rainy season, the researchers discovered, the link between temperature and stroke was at its highest. After controlling for relative humidity, barometric pressure, and PM2.5 concentration, there was a 35% increase in the likelihood of emergency visits for stroke for every 1°C rise in temperature. Each 1°C rise in temperature was linked to a 24% higher chance of hemorrhagic stroke, a 36% higher chance of ischemic stroke, and a 56% higher chance of transient ischaemic attack when each kind of stroke was examined independently.

The researchers examined if there may be “impact modification” based on the wet season in a subsequent analysis. Effect modification refers to the possibility that the relationship between an outcome (emergency visit for stroke) and an exposure (hot air temperature) may vary based on a third variable (during and after the rainy season). The wet season served as the reference period for this investigation.

Once more, the bond was at its greatest one month following the wet season. For every 1°C increase in temperature throughout the reference period, the risk of stroke increased by 31%.

Dr. Fujimoto explained: “The results of the second analysis suggest that environmental conditions immediately after the rainy season intensify the relationship between hot weather and stroke. In addition to high temperatures, this period is characterised by an increase in sunshine duration and less rain, which may explain the findings.”

He concluded: “Our study suggests that older adults should try to keep cool during hot spells, for example by staying indoors during peak temperatures. Public health systems can help by providing cool spaces for members of the public to escape the heat during the hottest months of the year.”

While scientists have previously failed to create an effective vaccine against HIV, results from a first-in-human clinical study indicate that a novel vaccine design approach being used by scientists offers new potential. Researchers from Scripps Research, IAVI, Fred Hutchinson Cancer Center (Fred Hutch), and the National Institutes of Health’s (NIH) Vaccine Research Center (VRC) published their findings in a paper in the journal Science. They provided important new insights into their novel vaccine strategy, which involves a stepwise method of producing antibodies capable of targeting a wide range of HIV variants.

“The data we are publishing in Science demonstrates for the first time that one can design a vaccine that elicits made-to-order antibodies in humans. We specified in advance certain molecular properties of the antibodies that we wanted to elicit, and the results of this trial show that our vaccine antigen consistently induced precisely those types of antibodies,” said co-senior author William Schief, PhD, a professor and immunologist at Scripps Research and executive director of vaccine design at IAVI’s Neutralizing Antibody Center, whose laboratory developed the vaccine antigen. “We believe this vaccine design strategy will be essential to make an HIV vaccine and may help the field create vaccines for other difficult pathogens.”

The initial step of the multi-stage HIV vaccination regimen that researchers are designing was evaluated in the Phase 1 study, known as IAVI G001. The study results demonstrate that the vaccination had a good safety profile and elicited the desired reaction in 97% of recipients. The Science research, which is significant, also offers a thorough immunological examination of the vaccination reactions.

“HIV represents an area of dire unmet need across the world, which is what makes the findings from our Phase 1 clinical trial so encouraging,” says Mark Feinberg, MD, PhD, president and CEO of IAVI. “Through the close-knit collaboration of many different scientists, disciplines and institutions, we are that much closer to designing an effective vaccine that could help end the HIV pandemic.”

The initial step of the multi-stage HIV vaccination regimen that researchers are designing was evaluated in the Phase 1 study, known as IAVI G001. The study results demonstrate that the vaccination had a good safety profile and elicited the desired reaction in 97% of recipients. The Science research, which is significant, also offers a thorough immunological examination of the vaccination reactions.

The immune system’s preparation
A uncommon class of antibodies known as broadly neutralising antibodies (bnAbs) can combat and provide protection from a wide range of viral types, including HIV. This is the reason why researchers have attempted, but so far failed, to create an HIV vaccine that causes bnAbs.

To eventually develop bnAbs that can defend against HIV, the study’s researchers are employing a technique known as “germline targeting.” The initial stage in germline targeting is to stimulate the bnAb-precursor B cells, which are a subset of the rare immune cells that can ultimately develop into cells that make the bnAbs required to stop the virus.

In order to complete this initial stage, the researchers created an immunogen, a specially engineered chemical that would “prime” the immune system and trigger reactions from these uncommon bnAb-precursor cells.
The main objective of the IAVI G001 experiment was to evaluate the vaccine’s safety profile and its ability to elicit responses from these bnAb-precursor B cells.

“Through extensive safety and tolerability monitoring during the trial, we showed the vaccine had a favorable safety profile, while still inducing the necessary target cells,” says study author Dagna Laufer, MD, vice president and head of clinical development at IAVI. “This represents a large step forward in developing an HIV vaccine that is both safe and effective.”

The researchers used a complex analytical procedure to evaluate if the targeted bnAb-precursor B cells were induced. “The workflow of multidimensional immunological analyses has taken clinical trial evaluation to the next level,” says co-senior author Adrian B. McDermott, PhD, former chief of the Vaccine Immunology Program at the NIAID VRC. “In evaluating these important immunological factors, we helped show why the vaccine antigen was able to induce the targeted response in 97% of vaccine recipients.”

IAVI G001, which recruited 48 healthy adult volunteers, was funded by IAVI and held at two locations: Fred Hutch in Seattle and George Washington University (GWU) in Washington, D.C. The vaccine antigen, eOD-GT8 60mer, was given in two doses coupled with an adjuvant created by the pharmaceutical company GSK, or the placebo. Lead investigators at the study locations were David Diemert, MD, professor of medicine at GWU School of Medicine and Health Sciences, and Julie McElrath, MD, PhD, co-senior author, senior vice president, and director of Fred Hutch’s Vaccine and Infectious Disease Division.

Additional Immunological Detail
In order to understand how the immune system responded to the vaccination, the study also carefully studied the characteristics of the antibodies and B cells that were produced by the vaccine antigen. Schief compares this to “looking under the hood” of a car. According to one study, the vaccination antigen initially activated an average of 30 to 65 distinct bnAb precursors per individual who received the shot before inducing the growth of those cells. This made it easier to understand why virtually all individuals responded as expected after receiving the vaccination.

Other investigations focused on the precise alterations the bnAb-precursor B cells accumulated over time and the degree of their affinity for the vaccination antigen. These studies demonstrated that the bnAb-precursor B cells increased their affinity and progressed along advantageous maturation paths following each dosage of the vaccination.

The idea of “competitors,” or the B cells produced by the vaccination antigen but not precursors to bnAb, is one worry for this kind of vaccine technique. The “competitor” answers were thoroughly analysed by the researchers, and the findings were quite positive. In spite of the fact that the bulk of the B cells activated by vaccination were “competitors,” they were unable to match the affinity of the required bnAb precursors and did not appear to obstruct the development of the bnAb-precursor responses.

“These findings were very encouraging, as they indicated that immunogen design principles we used could be applied to many different epitopes, whether for HIV or even other pathogens,” adds Schief. The researchers will continue to iterate and construct boosting immunogens in order to finally induce the required bnAbs and give protection against the virus. With these encouraging results in hand covering both safety and immune responses.

These results also came soon after two further studies in Immunity, which were published in September 2022 and supported the germline-targeting strategy for HIV vaccination.

“Working together with IAVI, Scripps Research, the VRC, GWU, additional investigators at Fred Hutch and many others, this trial and additional analyses will help inform design of the remaining stages of a candidate HIV vaccine regimen — while also enabling others in the field to develop vaccine strategies for additional viruses,” said McElrath of Fred Hutch.

A recent study on postmenopausal women discovers associations between commonly eaten meals and the variety and makeup of mouth bacteria. Researchers from the University of Buffalo have discovered how certain foods affect the oral microbiome of postmenopausal women. They discovered that consuming more sugary and high glycemic load foods, such as doughnuts and other baked goods, regular soft drinks, breads, and nonfat yogurts, may influence poor oral health and, possibly, systemic health outcomes in older women due to the impact these foods have on the oral microbiome.

The UB-led team investigated whether carbohydrates and sucrose, or table sugar, were associated with the diversity and composition of oral bacteria in a sample of 1,204 postmenopausal women using data from the Women’s Health Initiative in a study published in Scientific Reports, an open access journal from the publishers of Nature.
It is the first study to look at carbohydrate consumption and the subgingival microbiota in a group of only postmenopausal women. The samples used in the study were collected from subgingival plaque, which forms behind the gums, rather than salivary microorganisms.

“This is important because the oral bacteria involved in periodontal disease are primarily residing in the subgingival plaque,” said Amy Millen, PhD, associate professor of epidemiology and environmental health at the University at Buffalo’s School of Public Health and Health Professions.
“Looking at measures of salivary bacteria might not tell us how oral bacteria relate to periodontal disease because we are not looking in the right environment within the mouth,” she added.

The researchers discovered a link between total carbs, glycemic load, and sucrose and Streptococcus mutans, a contributor to tooth decay and several forms of cardiovascular disease, confirming prior findings. However, they discovered previously unknown correlations between carbohydrates and the oral microbiota.

The researchers discovered that Leptotrichia spp., which has been linked to gingivitis, a common gum condition, was positively connected with sugar intake in several trials. According to Millen, the other bacteria they detected as being connected with carbohydrate intake or glycemic load had not previously been recognised as contributing to periodontal disease in the literature or in this cohort of women.

“We examined these bacteria in relation to usual carbohydrate consumption in postmenopausal women across a wide variety of carbohydrate types: total carbohydrate intake, fiber intake, disaccharide intake, to simple sugar intake,” Millen said. “No other study had examined the oral bacteria in relation to such a broad array of carbohydrate types in one cohort. We also looked at associations with glycemic load, which is not well studied in relation to the oral microbiome.” The key question now is what all of this means for overall health, which is not as clear.

“As more studies are conducted looking at the oral microbiome using similar sequencing techniques and progression or development of periodontal disease over time, we might begin to make better inferences about how diet relates to the oral microbiome and periodontal disease,” Millen said.