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Category: biotech/medical – Page 1,162

Toxicologists reveal popular weed killer may harm teenage brains

Of course, this study was performed on a relatively small group of individuals in an agricultural community, which is not the environment that most American teenagers grow up in. These links may also be due to some other confounding factors, like spending more time on the farm than in formal education. However, these results are still striking and important to consider for young people in farming communities (and non-farming communities) around the world.

“Many chronic diseases and mental-health disorders in adolescents and young adults have increased over the last two decades worldwide, and exposure to neurotoxic contaminants in the environment could explain a part of this increase,” senior author Jose Ricardo Suarez, an associate professor in the Herbert Wertheim School of Public Health, said in a statement.

“Hundreds of new chemicals are released into the market each year, and more than 80,000 chemicals are registered for use today,” Suarez added. “Sadly, very little is known about the safety and long-term effects on humans for most of these chemicals. Additional research is needed to truly understand the impact.”

Ionic crystal generates molecular ions upon positron irradiation

The positron, the antiparticle of the electron, has the same mass and charge as that of an electron but with the sign flipped for the charge. It is an attractive particle for scientists because the use of positrons has led to important insights and developments in the fields of elementary particle physics, atomic physics, materials science, astrophysics, and medicine.

For instance, positrons are known to be components of antimatter. They are also powerful in detecting lattice defects in solids and semiconductors and in structural analysis of the topmost surface of crystals.

Positronic compounds, namely bound states of positrons with regular atoms, molecules, or ions, represent an intriguing aspect of –matter interactions and have been studied experimentally via observation of positron annihilation in gases. It may be possible to generate new molecules and ions via the formation of positron compounds, but no research has ever been done from such a perspective.

Rheumatoid Arthritis: Diagnosis, Treatment, and Steps to Take

Did you know (RA) is a long-lasting autoimmune disease that affects joints? The immune system is meant to protect us, but with RA, it attacks healthy tissue. This can cause pain, swelling, stiffness, and loss of joint function.

Caring for yourself when living with RA includes knowing when to rest and when to exercise, occasionally wearing a splint, and managing stress levels.

Find more tips for coping with RA from NIAMS:

What is rheumatoid arthritis? It is a disease that affects multiple joints, resulting in pain, swelling, and stiffness. Tiredness and fever may also be present.

How a Small Strand of RNA is Key to Fighting Cancer

Imagine that the human body is a… More.

How a Small Strand of RNA is Key to Fighting #Cancer.

Called let-7, the microRNA governs formation of the cellular memory pool and is a gift from the dawn of animal life. A team of researchers at the University of Massachusetts Amherst has shown that a single, small strand of microRNA, or miRNA, known as let-7, governs the ability of T-cells to recognize and remember tumor cells. This cellular memory is the basis for how vaccines work. Boosting cellular memory to recognize tumors could help improve cancer therapies. The research, published recently in Nature Communications, suggests a new strategy for the next generation of cancer-fighting immunotherapies.

Imagine that the human body is a fortress, says Leonid Pobezinsky, associate professor of veterinary and animal sciences at UMass Amherst and the paper’s senior author, along with Elena Pobezinskaya, a research assistant professor also in veterinary and animal sciences at UMass. Our bodies have T-cells, which are white blood cells that specialize in fighting both pathogens, think of the common cold, and altered cells of the organism itself, like tumor cells. Most of the time, the T-cells are naïve — mustered out of duty and resting. But when they recognize foreign antigens after bumping into them, they suddenly wake up, turn into killer T-cells and attack whatever the pathogen may be, from the sniffles to COVID, or even cancer. After the killer T-cells have won their battle, most of them die.

But, says Pobezinsky, somehow a few survive, transform into memory cells and form an elite task force called the ‘memory pool’ — they remember what that particular antigen looked like, so that they can be on the lookout for the next time it invades the body.

The Impact of Ejection Fraction on Major Adverse Limb Events After Lower Extremity Revascularization

A new Yale study finds low ejectionfraction – the amount of blood your heart pumps out with each beat – is associated with worse cardiovascular outcomes for patients with peripheral artery disease (PAD):

You can learn more about important PAD risk factors here: https://brnw.ch/21wDlIR

Peripheral arterial disease (PAD) is commonly associated with coronary artery disease (CAD), and echocardiography is frequently performed prior to lower extremity revascularization (LER). However, the incidence of various echocardiographic findings in patients with PAD and their impact on the outcomes of LER has not been well studied.

What is Pre-Cancer?

“Cancer” is not a word we want to hear. Conversations with your doctor about cancer can induce fear, anxiety, and a plethora of other emotions. But what if your doctor uses the phrase This terminology will probably still make a lot of people anxious and, in some situations, could result in some unnecessary treatment.

Several types of malignancies are associated with conditions that, while benign, could infer a more significant risk or likelihood of developing cancer in the future. Terminology including lesions, “stage 0” disease, or carcinoma “in situ” can all describe an abnormal, yet not malignant, finding. In addition to fear, these diagnoses can undoubtedly lead to patient confusion.

A diagnosis indicates abnormal cells present in a single location in the body. If a lesion isous, it has not spread to any other tissue, distant or nearby. This explains why theous conditions associated with several cancer types have names that involve the phrase “in situ,” which means “in its original place.”

Is the reversal of cellular aging possible through chemical means?

This is a bit technical. “nucleocytoplasmic compartmentalization assay”, Yeah buddy.

Life is dependent on the preservation and storage of information. The genome and epigenome are the two central storehouses of information in eukaryotes, and although they work interdependently, they are fundamentally quite different. Genetic information is consistent across all body cells throughout the life of an individual while epigenetic information varies between cells as well as changes over time and as per environment.

Researchers have identified several hallmarks of aging such as epigenetic alterations, genomic instability, cellular senescence, telomere attrition, mitochondrial dysfunction, and others [1]. These are known to play a role in the dysfunction and deterioration of cells with age. David Sinclair and other researchers have previously indicated that loss of epigenetic information can cause changes in gene expression, leading to cellular identity loss. Previous studies in mice have also shown that cell injuries such as cell crushing and DNA double-strand breaks can promote loss of epigenetic information which can accelerate aging along with age-related diseases [2].

Cellular senescence is a state of stable cell cycle arrest that can be triggered due to a wide range of extrinsic as well as intrinsic factors. It promotes tissue remodeling, wound repair, and cancer prevention by stopping the proliferation of damaged and aged cells. Senescent cells are characterized by metabolic and morphological alterations, reorganization of the chromatin, and release of pro-inflammatory substances known as the senescence-associated secretory phenotype (SASP) [3]. Irreparable DNA damage, loss of epigenetic information, and telomere shortening are a few factors that can initiate cellular senescence. Accumulation of senescent cells with age results in inflammation as well as the generation of reactive oxygen species (ROS).

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Challenging Long-Held Assumptions: New Research Reveals How Nuclear Spin Impacts Biological Processes

A research team led by Prof. Yossi Paltiel at the Hebrew University of Jerusalem with groups from HUJI, Weizmann, and IST Austria recently conducted a study unveiling the significant influence of nuclear spin on biological activities. This discovery challenges long-held assumptions and opens up exciting possibilities for advancements in biotechnology and quantum biology.

Scientists have long believed that nuclear spin had no impact on biological processes. However, recent research has shown that certain isotopes behave differently due to their nuclear spin. The team focused on stable oxygen isotopes (16O, 17O, 18O) and found that nuclear spin significantly affects oxygen dynamics in chiral environments, particularly in its transport.

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