About Careers Internship MedBlog Contact us
Medindia LOGIN REGISTER
Advertisement

Immune Response in the Gut Destroyed Within Days of HIV-1 Infection

by Rajashri on July 9, 2009 at 7:49 PM
Font : A-A+

 Immune Response in the Gut Destroyed Within Days of HIV-1 Infection

HIV-1 virus moves rapidly in the body, and damages the B-cell antibody-producing system in the gut, within days of infection, according to new research.

The study by Centre for HIV/AIDS Vaccine Immunology is the first to examine what happens to B cells in the gut in the earliest stage of HIV-1 infection.

Advertisement

"These new data show that damage to the antibody arm of the immune system begins quickly, within days. We know that by 80 days, half of the generative microenvironments for antibodies within the immune system in the gut are destroyed," said Dr. Barton Haynes, senior author of the study.

The findings could solve one of the big mysteries in HIV-why the B cell, or antibody response, is so slow to arise in the first place and turns out to be so weak after it does, that it is unable to offer any kind of meaningful defence.
Advertisement

B cells that make antibodies against invading microbes are born in the bone marrow, but migrate out and mature in different locations throughout the body.

Some wind up in the intestine and settle in stretches of lymph node-like follicles called Payer's patches, which are found at the bottom of the small intestine, where they wait to rise up against incoming bacteria, viruses, or other pathogens.

"Unfortunately, we found they are no match for HIV-1," said Anthony Moody, a lead author of the study.

For the study, the researchers examined B cells in blood as early as 17 days after viral transmission, and in lymph tissue in the gut beginning at 47 days after transmission in 40 people infected with HIV-1.

They compared their findings with similar tissue from healthy controls, and found that even at the early stage, HIV-1 had already ravaged the gut's B cell arm of the immune system.

The vast majority of the follicles in the Payer's patches had been damaged.

"HIV-1 turns on the immune system, but turns it on in the wrong way. We found that it was churning out all sorts of B cells. Some appeared to be reactive against HIV-1, but others appeared reactive to things like influenza as well as self molecules," said Moody.

Besides, it was found that by as early as 17 days after transmission, HIV-1 decreased the numbers of naive B cells - cells that may have had the potential to mature into potent infection-fighters.

The researchers are hoping that the findings may lead to a successful AIDS vaccine.

The study has been published in the open access journal PLoS Medicine.

Source: ANI
RAS
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
What's New on Medindia
World Heart Day in 2022- Use Heart for Every Heart
Anemia among Indian Women and Children Remains a Cause of Concern- National Family Health Survey-5
H1N1 Influenza Prevention in Children: What Parents Need to Know
View all
Recommended Reading
News Archive
Date
Category
Advertisement
News Category

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Flu Myasthenia Gravis Probiotics - Support System for the Gut Leaky Gut Syndrome 

Most Popular on Medindia

Vent Forte (Theophylline) Daily Calorie Requirements Accident and Trauma Care Calculate Ideal Weight for Infants Find a Doctor Indian Medical Journals Find a Hospital Drug Side Effects Calculator Post-Nasal Drip Drug Interaction Checker
This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use
×

Immune Response in the Gut Destroyed Within Days of HIV-1 Infection Personalised Printable Document (PDF)

Please complete this form and we'll send you a personalised information that is requested

You may use this for your own reference or forward it to your friends.

Please use the information prudently. If you are not a medical doctor please remember to consult your healthcare provider as this information is not a substitute for professional advice.

Name *

Email Address *

Country *

Areas of Interests