A “Whole New World” of Lymphatic System Discovered

The Discovery

Recent findings at the University of Finland and UVA School of Medicine have overturned 300 years of accepted anatomical fact. Until recent years, the scientific community believed that the lymphatic system — which functions in the body to remove waste and toxins — did not extend into the human brain.

Then came Kari Alitalo. Kari desired a better map of the lymphatic vessels, so three years ago he dosed the lymph cells of mice with a glowing jellyfish gene. At the end of the experiment, he was shocked to see that the mice’s heads were glowing. To be certain his results were correct, he repeated the experiment. His repeat showed exactly the same phenomenon.

As it turns out, Kari had discovered what he termed to be the glymphatic system — the division of the lymphatic system that exists as “glia” cells in the brain.

The Glymphatic System

As it turns out, the glymphatic system may have major implications for degenerative diseases. It’s possible that Alzheimer’s, Huntington’s, and Parkinson’s diseases could be effected by dysfunction in the glymphatic system. A dysfunctional lymphatic system can lead to a buildup of toxins and waste in the body — and a dysfunctional glymphatic system may lead to a buildup of toxins in the brain.

Early studies at Yale and Oregon Health & Science University suggest that a functioning glymphatic system is essential to a healthy brain. Harvard has shown that glymphatic flow is decreased right before a migraine. Research has also shown that the glymphatic system works best when we are asleep, and that sleeping on your side is better than sleeping on your stomach or back.

 

It’s clear that this revolutionary anatomical discovery will have major impact for clinical therapies for all kinds of neurodegenerative diseases. Read the full article from the Washington Post here, and make sure to subscribe to our blog for the latest news and events across the biotech world.

Alzheimer’s PET Scan – US National Institute on Aging, Alzheimer’s Disease Education and Referral Center

Another DNA Vaccine for Zika Shows Promise

A preventive DNA vaccine encoding two Zika structural proteins protected Rhesus macaques from viral infection. The results, published today (September 22) in Science, are encouraging for organizers of the ongoing Phase 1 clinical trial testing one of the two vaccines examined in this nonhuman primate study. The new work suggests a minimal antibody level in the blood that is likely necessary for protection against Zika virus infection in in people.

Read at The Scientist

Toward Preventing Transplant Rejection with Immunologically Matched Stem Cells

Donor stem cell–derived retinal epithelial cells whose immune proteins correspond to those of a recipient are tolerated following transplant into monkeys’ eyes, according to a report published today (September 15) in Stem Cell Reports. In an accompanying paper, the team also reports that such immune-matched retinal cells derived from humans prevent immune responses in cultured human lymphocytes.

Read at The Scientist

Benefits of taking statins has been underestimated

The benefits of the cholesterol-reducing drug statins are underestimated and the harms exaggerated, a major review suggests.

Published in the Lancet and backed by a number of major health organisations, it says statins lower heart attack and stroke risk.

The review also suggests side effects such as muscle pain do occur, although in relatively few people.

But critics say healthy people are unnecessarily taking medication.

Statins reduce the build-up of fatty plaques that lead to blockages in blood vessels. According to the report authors:

  • About six million people are currently taking statins in the UK
  • Of those, two million are on them because they have already had a heart attack, stroke or other cardiovascular event
  • The remaining four million take statins because of risk factors such as age, blood pressure or diabetes
  • Up to two million more should possibly take statins

The Lancet review, led by Prof Rory Collins from the Clinical Trial Service Unit at the University of Oxford, looked at the available evidence for the effects of taking an average 40mg daily dose of statins in 10,000 patients over five years.

It suggested cholesterol levels would be lowered enough to prevent 1,000 “major cardiovascular events” such as heart attacks, strokes and coronary artery bypasses in people who had existing vascular disease – and 500 in people who were at risk due to age or other illnesses such as high blood pressure or diabetes.

 

Read at BBC News

Alzheimer’s drug study gives ‘tantalising’ results

A drug that destroys the characteristic protein plaques that build up in the brains of patients with Alzheimer’s is showing “tantalising” promise, scientists say.

Experts are cautious because the drug, aducanumab, is still in the early stages of development.

But a study in Nature has shown it is safe and hinted that it halts memory decline.

Larger studies are now under way to fully evaluate the drug’s effects.

The build-up of amyloid in the brain has been a treatment target for many years.

This study, of 165 patients, was designed to test aducanumab was safe to take.

After a year of treatment, it also showed the higher the dose the stronger the effect on amyloid plaques.

 

Read at BBC 

 

Link to paper 

Zika Virus’s Spread Pushes Testing Labs to Expand Capacity

Study found a gap between resources, potential need in the case of a U.S. outbreak

 

As summer drew near, the nation’s health officials took stock of whether they could handle a surge in demand for Zika diagnostic tests if disease-carrying mosquitoes began to proliferate.

A survey of state and local laboratories found enough capacity to perform 3,500 to 5,000 tests a week for the Zika virus. But that wouldn’t be enough to meet demand under the Centers for Disease Control and Prevention’s worst-case scenario for a domestic Zika outbreak.

The gap was “considerable,” said Kelly Wroblewski, director of infectious diseases for the Association of Public Health Laboratories, which conducted the April survey.

The finding set off a rush to expand lab capacity that continues as Zika’s foothold in the U.S. expands. In recent months, dozens of public health laboratories—which work with the government to monitor public health and screen for disease—bought equipment, stockpiled supplies and trained employees needed to start Zika testing, said state and local health officials.

Twelve California public health labs are preparing to start performing Zika tests; five others already do. The health department in Houston conducts one type of Zika test and will perform a second “as soon as we can get the equipment in the door,” said Larry Seigler, director of the city’s health labs.

 

Read at Wall Street Journal

Hematopoietic Stem and Progenitor Cell Gene Therapy

The recent regulatory approval of the first hematopoietic stem and progenitor cell gene therapy (HSPC-GT) signals the start of a new era for gene therapy and highlights the potential contribution by high-throughput cell culture technologies in propelling HSPC-GT from curing rare diseases to curing more common diseases.

Hematopoietic stem cells (HSCs) are the “fountain” for all blood cells that circulate in our bodies throughout life. Arguably, no other cell type has more profound and far-reaching influence on our well-being than HSCs. They reside in our bone marrow and continuously produce a variety of cells with vital tasks, for example, oxygenation via red blood cells, termination of bleeding via platelets, and immunity via leukocytes, which also provide immune defense to the central nervous system.

There is, however, a flipside to the pre-eminence of HSCs. When faulty HSCs emerge, devastating outcomes can ensue, such as autoimmune diseases like multiple sclerosis and blood cancers like leukemia. Thankfully, a solution to these life-threatening indications is well at hand because HSCs can be removed and replaced with healthy HSCs using HSC transplantation (HSCT)—a highly effective procedure pioneered by Nobelist E. Donnall Thomas over five decades ago.

 

Read at GEN

Can season and place of birth influence celiac disease risk?

Winter babies and people born in places with shorter days and less sunlight might have a lower risk of developing celiac disease than peers born in warmer regions or seasons, a Swedish study suggests.

About one in 100 people have celiac disease, an autoimmune disorder that damages the small intestine and interferes with the absorption of nutrients from food. People with celiac disease can’t tolerate gluten, a protein in wheat, rye and barley. Left untreated, the condition can lead to complications such as malnutrition, low bone density, lactose intolerance and infertility.

While the exact causes of celiac disease are unknown, some previous research has pointed to the potential for the season of one’s birth to be among many environmental factors that might influence the risk, said lead study author Fredinah Namatovu, a public health researcher at the Umea University in Sweden.

“Season of birth and area of birth appears to play a role,” Namatovu said by email. “Season and region of birth could be a proxy for other factors such as vitamin D and viral infections.”

 

Read at Reuters

Sea anemones could be the key to treating hearing loss

Sea anemones could soon do a lot to help those of us living above the water. Researchers have discovered that proteins used by starlet sea anemones to repair their cells also repair the sound-sensing cells in mice and other mammals. If you bathe cells in those proteins for long enough (the team tried for an hour), they rapidly restore molecular links that bundle hearing-related hair cells together. In theory, you could reverse hearing damage among cells that haven’t been permanently lost — that exceptionally loud concert might not permanently limit your listening enjoyment.

 

Read at Journal of Experimental Biology