Breaking News
July 19, 2018 - On-the-Job Stress Relief – Drugs.com MedNews
July 19, 2018 - Compounds found in green tea and wine may block formation of toxic metabolites
July 19, 2018 - Gene regulator associated with protein pileup in exfoliation glaucoma
July 19, 2018 - Trump administration summons immigrant infants
July 19, 2018 - FDA grants approval for first breast cancer drug through ‘Real-Time Oncology Review’
July 19, 2018 - Five tips for men seeking plastic surgery
July 19, 2018 - Researchers discover the reasons why some people get dizzy when hearing certain sounds
July 19, 2018 - Research project investigates snake venom treatment as antibiotic alternative for eye infections
July 19, 2018 - Melanoma could soon be detected using a blood test
July 19, 2018 - Exposure to bright light may have big impact on sleep-related behavior in children
July 19, 2018 - Deleting single gene in gut bacteria affects metabolism, reduces weight gain in mice
July 19, 2018 - New proteomics studies help gain more insights into Alzheimer’s, cancer and listeriosis
July 19, 2018 - Study finds major discrepancies in prescription drug labeling pregnancy information across four countries
July 19, 2018 - Cellectar’s CLR 131 Receives FDA Orphan Drug Designation for Treatment of Ewing’s Sarcoma
July 19, 2018 - Watching the immune system in action reveals what happens when things goes wrong
July 19, 2018 - Increasing blood sugar levels improves memory and performance in older adults
July 19, 2018 - Connection between self-regulation and obesity appears to be different for girls and boys
July 19, 2018 - Researchers develop new, less destructive method for whitening teeth
July 19, 2018 - Revving up innate control of viral infection requires a three-cell ignition
July 19, 2018 - Inaccurate direct-to-consumer raw genetic data can harm patients, new research suggests
July 19, 2018 - Weight loss surgery is effective under the right situations
July 19, 2018 - BioTek awarded patent for autofocus feature on microplate reader
July 19, 2018 - Low-carb diets reduce stiffness of arteries in women and promote weight loss in men
July 19, 2018 - New review examines cannabinoids’ potential for direct treatment of cancer
July 19, 2018 - Allergic responses may help protect the skin against cancer, research suggests
July 19, 2018 - Inappropriate Prescribing of Abx High in Urgent Care Centers
July 19, 2018 - Many at risk for HIV despite lifesaving pill
July 19, 2018 - Tips for doctors and parents on the harms of marijuana use for teens
July 18, 2018 - Researchers detect presence of IgE antibodies after kidney transplantation
July 18, 2018 - New technique allows researchers to create large scale, personalized bone grafts
July 18, 2018 - Smoking May Boost Atrial Fibrillation Risk
July 18, 2018 - Genome editing method targets AIDS virus
July 18, 2018 - These things matter: Medical complications are not inevitable, a physician writes
July 18, 2018 - Cognitive functions often wilt as water departs the body, shows study
July 18, 2018 - Origins of bread found 14,400 years ago in Jordan
July 18, 2018 - Low-dose ketamine found to be as effective as opioids for treating acute pain
July 18, 2018 - Novel bioengineering technique could help repair bone defects
July 18, 2018 - Researchers identify new potential target protein for colon cancer
July 18, 2018 - Air pollution contributes significantly to diabetes globally
July 18, 2018 - Cell membrane’s importance offers new strategy to fight infections
July 18, 2018 - Researchers identify key protein involved in irregular brain cell activity
July 18, 2018 - 3D modeling of drug resistance could lead to more effective cancer treatment
July 18, 2018 - Hunger hormones could be key to new treatments for drug, alcohol addiction
July 18, 2018 - Nitrate-cured meats may contribute to mania, study finds
July 18, 2018 - Why men may recover more quickly from influenza infections than women
July 18, 2018 - Study finds discharge against medical advice as predictor of readmissions in heart attack patients
July 18, 2018 - KemPharm Announces Top Line Results from KP415.E01 Efficacy and Safety Trial in Children With ADHD
July 18, 2018 - Self-control and obesity: Gender matters in children
July 18, 2018 - Bioengineers, diabetes researchers convene to discuss future concepts for precision medicine
July 18, 2018 - New findings support more conservative use of ED neuroimaging for non-index seizures
July 18, 2018 - Practicing yoga benefits pregnant women, study suggests
July 18, 2018 - New strategy may lead to more accurate breast cancer diagnoses
July 18, 2018 - FDA Approves Symtuza (D/C/F/TAF), the First and Only Complete Darunavir-Based Single-Tablet Regimen for the Treatment of HIV-1 Infection
July 18, 2018 - New guide helps hospitals pick right partner to handle hospitalist services
July 18, 2018 - Deep data dive helps predict cerebral palsy
July 18, 2018 - Stricter firearm legislation associated with reduced murder and suicide rates
July 18, 2018 - Physical and sexual abuse in childhood associated with endometriosis risk
July 18, 2018 - Omega 3 supplements do not reduce risk of heart disease, stroke or death
July 18, 2018 - GSA’s new publication provides support for safe use of OTC analgesics by older adults
July 18, 2018 - Researchers receive grant from U.S. Department of Education to study children with HFASD
July 18, 2018 - Early childhood adversity increases sensitivity of the body’s immune response to cocaine
July 18, 2018 - Parental incarceration affects health behaviors of children in adulthood
July 18, 2018 - Researchers find that yellow fever and Asian tiger mosquitoes can carry new virus
July 18, 2018 - Two Regimens Fail to Stop Declines in β-Cell Function
July 18, 2018 - Researchers apply computing power to track the spread of cancer
July 18, 2018 - Olfactory receptors play pathophysiological role in all organs than merely smell perception
July 18, 2018 - Fish consumption associated with lower risk of early death
July 18, 2018 - MR Solutions’ 7T MRI imaging system installed at University of Hawaii
July 18, 2018 - Humorous ads screened around World Cup game achieve higher biometric response than sporty ads
July 18, 2018 - New study demonstrates little effect of hormone therapy on artery thickness
July 18, 2018 - A 3-Pronged Plan to Cut Type 2 Diabetes Risk
July 18, 2018 - New clues to sepsis may speed diagnosis
July 18, 2018 - Stars of Stanford Medicine: Improving cardiovascular health in Africa and beyond
July 18, 2018 - Heart attack risk continues to increase among pregnant women, study finds
July 18, 2018 - Few tips to help avoid sunburns in summer
July 18, 2018 - High-fat diet and systemic inflammation contribute to progression of prostate cancer
July 18, 2018 - Researchers develop 3D map of gene interactions that play key role in heart disease
July 18, 2018 - Conservative management of lung subsolid nodules reduces overtreatment and unnecessary surgery
July 18, 2018 - Report warns of dog illness that can spread to owners
July 18, 2018 - A winning essayist’s tips for keeping track of scientific facts
Microglia play protective role in response to retinal detachment, shows study

Microglia play protective role in response to retinal detachment, shows study

image_pdfDownload PDFimage_print

A research team at Massachusetts Eye and Ear has shown that microglia, the primary immune cells of the brain and retina, play a protective role in response to retinal detachment. Retinal detachment and subsequent degeneration of the retina can lead to progressive visual decline due to photoreceptor cell death, the major light-sensing cell in the eye. In a report published online today in the journal Proceedings of the National Academy of Sciences (PNAS), the researchers describe, for the first time, the beneficial role of microglial cells in the eye after retinal detachment -; migrating to the site of injury to protect photoreceptors and to regulate local inflammation.

“Our results provide clear evidence that microglia protect photoreceptors from cell death in acute retinal detachment,” said senior author Kip Connor, Ph.D., vision researcher at Mass. Eye and Ear and Assistant Professor of Ophthalmology at Harvard Medical School. “We found that microglial cells rapidly migrate into the injured retina, where they formed close connections with infiltrating immune cells and removed injured photoreceptors. These findings provide the first insight into how microglia respond and function during retinal detachment.”

Affecting about 200,000 Americans per year, retinal detachments are considered sight-threatening medical emergencies. When the retina detaches from its normal position, it separates the blood vessels that supply oxygen to the eye, and photoreceptors -; the major light-sensing cells of the retina -; begin to die away. Retinal detachments can occur spontaneously, as a result of blunt trauma or as a side effect of a variety of eye diseases, including diabetic retinopathy, ocular tumors, and age-related macular degeneration.

The current standard of care for retinal detachment is surgical reattachment, with patients in the United States and Europe typically treated within one week. Today’s surgical techniques are highly effective in physically reattaching the retina, and – if surgery is timely – surgical outcomes are generally positive. However, in some cases, patients experience permanent vision loss accompanied by changes in color vision.

Researchers around the world -; across all fields of medicine -; have recently begun to shed light on the function of microglial cells in various conditions. In Alzheimer’s, Parkinson’s and other neurodegenerative diseases of the brain, they are thought to be harmful.

In the ophthalmology setting, microglial cells have been known to be activated in retinal detachment; however, it was previously unknown if these cells were harmful or protective against photoreceptor cell death.

In the PNAS report, the researchers describe morphological changes in microglia in response to retinal detachment in a preclinical model. In response to retinal detachment, microglia rapidly responded in a uniform migrating pattern, toward the affected area. When the researchers depleted microglia in the model, they saw more of the photoreceptor cells die away.

The authors on the PNAS report are hopeful that these findings suggest a new therapeutic avenue for preserving photoreceptors after retinal detachment.

“Clinically, in the context of retinal detachment, we think promoting these cells would be of significant therapeutic benefit -; perhaps early on, when they can keep inflammation in check,” said Yoko Okuniki, M.D., Ph.D., a postdoctoral fellow at Mass. Eye and Ear and the study’s lead author. “This could prevent the initial photoreceptor cell loss, preserving vision longer after retinal detachment and providing an extended therapeutic window for surgery.”

Source:

https://www.masseyeandear.org/news/press-releases/2018/06/microglia-protect-sensory-cells-needed-for-vision-after-retinal-detachment

Tagged with:

About author

Related Articles