Breaking News
May 3, 2019 - Vaping and Smoking May Signal Greater Motivation to Quit
May 3, 2019 - Dementia looks different in brains of Hispanics
May 3, 2019 - Short-Staffed Nursing Homes See Drop In Medicare Ratings
May 3, 2019 - Study of teens with eating disorders explores how substance users differ from non-substance users
May 3, 2019 - Scientists develop new video game that may help in the study of Alzheimer’s
May 3, 2019 - Arc Bio introduces Galileo Pathogen Solution product line at ASM Clinical Virology Symposium
May 3, 2019 - Cornell University study uncovers relationship between starch digestion gene and gut bacteria
May 3, 2019 - How to Safely Use Glucose Meters and Test Strips for Diabetes
May 3, 2019 - Anti-inflammatory drugs ineffective for prevention of Alzheimer’s disease
May 3, 2019 - Study tracks Pennsylvania’s oil and gas waste-disposal practices
May 3, 2019 - Creating a better radiation diagnostic test for astronauts
May 3, 2019 - Vegans are often deficient in these four nutrients
May 3, 2019 - PPDC announces seed grants to develop medical devices for children
May 3, 2019 - Study maps out the frequency and impact of water polo head injuries
May 3, 2019 - Research on Reddit identifies risks associated with unproven treatments for opioid addiction
May 3, 2019 - Good smells may help ease tobacco cravings
May 3, 2019 - Medical financial hardship found to be very common among people in the United States
May 3, 2019 - Researchers develop multimodal system for personalized post-stroke rehabilitation
May 3, 2019 - Study shows significant mortality benefit with CABG over percutaneous coronary intervention
May 3, 2019 - Will gene-editing of human embryos ever be justifiable?
May 3, 2019 - FDA Approves Dengvaxia (dengue vaccine) for the Prevention of Dengue Disease in Endemic Regions
May 3, 2019 - Why Tonsillitis Keeps Coming Back
May 3, 2019 - Fighting the opioid epidemic with data
May 3, 2019 - Maggot sausages may soon be a reality
May 3, 2019 - Deletion of ATDC gene prevents development of pancreatic cancer in mice
May 2, 2019 - Targeted Therapy Promising for Rare Hematologic Cancer
May 2, 2019 - Alzheimer’s disease is a ‘double-prion disorder,’ study shows
May 2, 2019 - Reservoir bugs: How one bacterial menace makes its home in the human stomach
May 2, 2019 - Clinical, Admin Staff From Cardiology Get Sneak Peek at Epic
May 2, 2019 - Depression increases hospital use and mortality in children
May 2, 2019 - Vicon and NOC support CURE International to create first gait lab in Ethiopia
May 2, 2019 - Researchers use 3D printer to make paper organs
May 2, 2019 - Viral infection in utero associated with behavioral abnormalities in offspring
May 2, 2019 - U.S. Teen Opioid Deaths Soaring
May 2, 2019 - Opioid distribution data should be public
May 2, 2019 - In the Spotlight: “I’m learning every single day”
May 2, 2019 - 2019 Schaefer Scholars Announced
May 2, 2019 - Podcast: KHN’s ‘What The Health?’ Bye-Bye, ACA, And Hello ‘Medicare-For-All’?
May 2, 2019 - Study describes new viral molecular evasion mechanism used by cytomegalovirus
May 2, 2019 - SLU study suggests a more equitable way for Medicare reimbursement
May 2, 2019 - Scientists discover first gene involved in lower urinary tract obstruction
May 2, 2019 - Researchers identify 34 genes associated with increased risk of ovarian cancer
May 2, 2019 - Many low-income infants receive formula in the first few days of life, finds study
May 2, 2019 - Global study finds high success rate for hip and knee replacements
May 2, 2019 - Taking depression seriously: What is it?
May 2, 2019 - With Head Injuries Mounting, Will Cities Put Their Feet Down On E-Scooters?
May 2, 2019 - Scientists develop small fluorophores for tracking metabolites in living cells
May 2, 2019 - Study casts new light into how mothers’ and babies’ genes influence birth weight
May 2, 2019 - Researchers uncover new brain mechanisms regulating body weight
May 2, 2019 - Organ-on-chip systems offered to Asia-Pacific regions by Sydney’s AXT
May 2, 2019 - Adoption of new rules drops readmission penalties against safety net hospitals
May 2, 2019 - Kids and teens who consume zero-calorie sweetened beverages do not save calories
May 2, 2019 - Improved procedure for cancer-related erectile dysfunction
May 2, 2019 - Hormone may improve social behavior in autism
May 2, 2019 - Alzheimer’s disease may be caused by infectious proteins called prions
May 2, 2019 - Even Doctors Can’t Navigate Our ‘Broken Health Care System’
May 2, 2019 - Study looks at the impact on criminal persistence of head injuries
May 2, 2019 - Honey ‘as high in sugars as table sugar’
May 2, 2019 - Innovations to U.S. food system could help consumers in choosing healthy foods
May 2, 2019 - FDA Approves Mavyret (glecaprevir and pibrentasvir) as First Treatment for All Genotypes of Hepatitis C in Pediatric Patients
May 2, 2019 - Women underreport prevalence and intensity of their own snoring
May 2, 2019 - Concussion summit focuses on science behind brain injury
May 2, 2019 - Booker’s Argument For Environmental Justice Stays Within The Lines
May 2, 2019 - Cornell research explains increased metastatic cancer risk in diabetics
May 2, 2019 - Mount Sinai study provides fresh insights into cellular pathways that cause cancer
May 2, 2019 - Researchers to study link between prenatal pesticide exposures and childhood ADHD
May 2, 2019 - CoGEN Congress 2019: Speakers’ overviews
May 2, 2019 - A new strategy for managing diabetic macular edema in people with good vision
May 2, 2019 - Sagent Pharmaceuticals Issues Voluntary Nationwide Recall of Ketorolac Tromethamine Injection, USP, 60mg/2mL (30mg per mL) Due to Lack of Sterility Assurance
May 2, 2019 - Screen time associated with behavioral problems in preschoolers
May 2, 2019 - Hormone reduces social impairment in kids with autism | News Center
May 2, 2019 - Researchers synthesize peroxidase-mimicking nanozyme with low cost and superior catalytic activity
May 2, 2019 - Study results of a potential drug to treat Type 2 diabetes in children announced
May 2, 2019 - Multigene test helps doctors to make effective treatment decisions for breast cancer patients
May 2, 2019 - UNC School of Medicine initiative providing unique care to dementia patients
May 2, 2019 - Nestlé Health Science and VHP join forces to launch innovative COPES program for cancer patients
May 2, 2019 - Study examines how our brain generates consciousness and loses it during anesthesia
May 2, 2019 - Transition Support Program May Aid Young Adults With Type 1 Diabetes
May 2, 2019 - Study shows how neutrophils exacerbate atherosclerosis by inducing smooth muscle-cell death
May 2, 2019 - Research reveals complexity of how we make decisions
Anti-integrin therapy effect on intestinal immune system in HIV-infected patients

Anti-integrin therapy effect on intestinal immune system in HIV-infected patients

The researchers’ anti-integrin therapy using the approved medication vedolizumab (VDZ) reduced aggregates of immune cells (green) in intestinal biopsies from a patient with HIV and IBD. Credit: M. Uzzan et al., Science Translational Medicine (2018)

In a study published today in Science Translational Medicine, Mount Sinai researchers describe for the first time a mechanism that may shrink collections of immune cells in the gastrointestinal (GI) tract, called lymphoid aggregates, where HIV may lay sequestered. These findings may be of interest to scientists who are involved in researching the cure for HIV infection in light of the strong role that the intestines play in it.

The study builds on research by the same team which found in 2004 that the intestines are specifically targeted by HIV at the earliest stage of infection. “We know from our earlier research that intestinal immune cells called CD4+ T cells are profoundly depleted during the earliest stages of HIV infection. Newer research from other groups has found that CD4 + T cells that migrate to the gut, and bear a receptor called a4b7, are highly susceptible to HIV,” says Saurabh Mehandru, MD, Associate Professor of Medicine (Gastroenterology) at the Icahn School of Medicine at Mount Sinai and the senior author on this study. Dr. Mehandru directs an immunology lab, part of the Division of Gastroenterology at the Icahn School of Medicine. The Mehandru Lab studies mucosal immunology as it pertains to immune deficiency states such as HIV infection and inflammatory disorders, with inflammatory bowel disease (IBD) being a focal point.

“Now, 14 years later, we have discovered how anti-a4b7 therapy can significantly, and rather unexpectedly, lead to the attenuation of lymphoid aggregates,” continues Dr. Mehandru. This is the first report of reduction in GI-associated lymphoid aggregates by a therapeutic intervention in patients with HIV-1 infection. “As such, these data describe a new mechanism of action of treatments targeting the a4b7 receptor and define a rational basis for the use of these treatments in HIV-1 infection and beyond,” says Dr. Mehandru.

Study authors, led by Ph.D. student Mathieu Uzzan, designed a study that involved a cohort of six individuals with mild IBD and concomitant HIV-1 infection receiving anti-a4b7 treatment, specifically vedolizumab (VDZ). VDZ has become a frontline strategy in the management of patients with IBD, in whom it has demonstrated strong efficacy and an excellent safety profile. The investigators studied immune cells in the blood and the intestines and describe the immunological and virological effects of VDZ therapy over a 30-week period.

“The therapy was tolerated well, with only minor adverse events reported. We were surprised by the impact of treatment on lymphoid aggregates in the GI tract of patients with HIV-1 infection. We believe these initial findings could have significant implications for HIV-1 infection, perhaps in combination with other agents such as broadly neutralizing anti-HIV antibodies,” says Dr. Mehandru.

Research was facilitated by scientists at the University of Hawaii, the Wistar Institute, the University of Montreal, and the University of Minnesota.


Explore further:
Protein produced in gut could stave off deadly bone marrow transplant complication

More information:
M. Uzzan el al., “Anti-a4ß7 therapy targets lymphoid aggregates in the gastrointestinal tract of HIV-1–infected individuals,” Science Translational Medicine (2018). stm.sciencemag.org/lookup/doi/ … scitranslmed.aau4711

Journal reference:
Science Translational Medicine

Provided by:
The Mount Sinai Hospital

Tagged with:

About author

Related Articles