Welcome, Guest: Register On Nairaland / LOGIN! / Trending / Recent / New
Stats: 3,158,475 members, 7,836,876 topics. Date: Wednesday, 22 May 2024 at 01:56 PM

Unique HIV Feature Might Be Key To New Vaccine Strategies - Health - Nairaland

Nairaland Forum / Nairaland / General / Health / Unique HIV Feature Might Be Key To New Vaccine Strategies (5808 Views)

Potential New Vaccine Blocks Every Strain Of HIV / Court Legalises Abalaka's HIV Vaccine, 16 Years After / New Vaccine That Cures Alcoholism (2) (3) (4)

(1) (Reply) (Go Down)

Unique HIV Feature Might Be Key To New Vaccine Strategies by supereagle(m): 6:49am On Oct 25, 2012
[b][/b]A recent discovery in South Africa could herald a new approach to combating HIV and AIDS and creating an AIDS vaccine.

A “unique change” in the outer covering of the human immunodeficiency virus found in two HIV-positive women enabled them to generate antibodies that can kill up to 88 percent of HIV types from around the globe, the science news website Science Daily reported.

The discovery was made during a study conducted by members of the Center for AIDS Program of Research in South Africa (CAPRISA) consortium, including scientists from Wits University, the National Institute for Communicable Diseases (NICD) in Johannesburg, University of Kwa Zulu-Natal, and the University of Cape Town.

It was the CAPRISA team who discovered the women, from South Africa’s KwaZulu-Natal province, who could make these rare antibodies.

According to Science Daily, Wits and NICD researchers Dr. Penny Moore and Professor Lunn Morris discovered that glycan, a type of sugar, on the protein coat of the virus at a specific position forms a "site of vulnerability" in the virus and "enables the body to mount a broadly neutralizing antibody response."

It is a significant discovery, as “HIV is an especially tricky virus for vaccine developers,” said The Scientist magazine, as “HIV’s rapidly mutating genome allows it to evade immune attack by changing its appearance, preventing recognition by initially effective antibodies."

"Understanding this elaborate game of 'cat and mouse' between HIV and the immune response of the infected person has provided valuable insights into how broadly neutralizing antibodies arise," Moore said.

“We had always assumed the first virus would be special,” University of Amsterdam immunologist Hanneke Schujtemaker told The Scientist, but added that the new study now challenges this assumption.

"We were surprised to find that the virus that caused infection in many cases did not have this antibody target on its outer covering,” said Morris.

"But over time, the virus was pressured by [the] body's immune reaction to cover itself with the sugar that formed a point of vulnerability, and so allowed the development of antibodies that hit that weak spot," he added.

The hunt for the most effective vaccine

Scientists have long believed that "broadly neutralizing antibodies" (which defend a cell from an infectious body by neutralizing any effect it has biologically) are the key to making the perfect AIDS vaccine.

"This discovery provides new clues on how vaccines could be designed to elicit broadly neutralizing antibodies. The world needs an effective AIDS vaccine to overcome the global scourge of AIDS," said CAPRISA director Prof. Salim Abdool Karim.

Even if the existence of these types of antibodies has been known for a while, broadly neutralizing antibodies against HIV were only identified three years ago.

The new study found one mechanism by which these antibodies can be made.

According to the Science Daily Report, the research team had to study the target of some of these antibodies, glycan, to form a site of vulnerability. "By tracing back the evolution of the virus that elicited these antibodies, this team showed that this particular weak point was absent from the virus that first infected these women," the report said.

"[U]nder constant pressure from other less powerful antibodies that develop in all infected people, their HIV was forced to expose this vulnerability over time. This allowed the broadly neutralizing antibodies to develop," it added.

Moore told The Scientist magazine, “This is the first time we’ve really understood that viral evolution itself shapes the antibodies that come out."

“Being able to work out the pattern of viral evolution will help us think about designing vaccines,” she added.

Moore also told The Scientist magazine that one strategy that may prove successful could be to provide sequential immunizations with vaccines containing different epitopes (parts of antigens, which create antibodies) “mimicking what happens naturally” as the viruses evolve.

HIV in the Philippines

In a conference on Oct. 18, the Department of Health (DOH) reported that between 1984 and 2012, the Philippines recorded 10,514 cases of HIV, with 353 deaths.

The DOH also noted that the majority of these cases involved individuals aged 15 to 24.

According to the Department, more than half of the cases were identified only in the last three years[b]A recent discovery in South Africa could herald a new approach to combating HIV and AIDS and creating an AIDS vaccine.

A “unique change” in the outer covering of the human immunodeficiency virus found in two HIV-positive women enabled them to generate antibodies that can kill up to 88 percent of HIV types from around the globe, the science news website Science Daily reported.

The discovery was made during a study conducted by members of the Center for AIDS Program of Research in South Africa (CAPRISA) consortium, including scientists from Wits University, the National Institute for Communicable Diseases (NICD) in Johannesburg, University of Kwa Zulu-Natal, and the University of Cape Town.

It was the CAPRISA team who discovered the women, from South Africa’s KwaZulu-Natal province, who could make these rare antibodies.

According to Science Daily, Wits and NICD researchers Dr. Penny Moore and Professor Lunn Morris discovered that glycan, a type of sugar, on the protein coat of the virus at a specific position forms a "site of vulnerability" in the virus and "enables the body to mount a broadly neutralizing antibody response."

It is a significant discovery, as “HIV is an especially tricky virus for vaccine developers,” said The Scientist magazine, as “HIV’s rapidly mutating genome allows it to evade immune attack by changing its appearance, preventing recognition by initially effective antibodies."

"Understanding this elaborate game of 'cat and mouse' between HIV and the immune response of the infected person has provided valuable insights into how broadly neutralizing antibodies arise," Moore said.

“We had always assumed the first virus would be special,” University of Amsterdam immunologist Hanneke Schujtemaker told The Scientist, but added that the new study now challenges this assumption.

"We were surprised to find that the virus that caused infection in many cases did not have this antibody target on its outer covering,” said Morris.

"But over time, the virus was pressured by [the] body's immune reaction to cover itself with the sugar that formed a point of vulnerability, and so allowed the development of antibodies that hit that weak spot," he added.

The hunt for the most effective vaccine

Scientists have long believed that "broadly neutralizing antibodies" (which defend a cell from an infectious body by neutralizing any effect it has biologically) are the key to making the perfect AIDS vaccine.

"This discovery provides new clues on how vaccines could be designed to elicit broadly neutralizing antibodies. The world needs an effective AIDS vaccine to overcome the global scourge of AIDS," said CAPRISA director Prof. Salim Abdool Karim.

Even if the existence of these types of antibodies has been known for a while, broadly neutralizing antibodies against HIV were only identified three years ago.

The new study found one mechanism by which these antibodies can be made.

According to the Science Daily Report, the research team had to study the target of some of these antibodies, glycan, to form a site of vulnerability. "By tracing back the evolution of the virus that elicited these antibodies, this team showed that this particular weak point was absent from the virus that first infected these women," the report said.

"[U]nder constant pressure from other less powerful antibodies that develop in all infected people, their HIV was forced to expose this vulnerability over time. This allowed the broadly neutralizing antibodies to develop," it added.

Moore told The Scientist magazine, “This is the first time we’ve really understood that viral evolution itself shapes the antibodies that come out."

“Being able to work out the pattern of viral evolution will help us think about designing vaccines,” she added.

Moore also told The Scientist magazine that one strategy that may prove successful could be to provide sequential immunizations with vaccines containing different epitopes (parts of antigens, which create antibodies) “mimicking what happens naturally” as the viruses evolve.

HIV in the Philippines

In a conference on Oct. 18, the Department of Health (DOH) reported that between 1984 and 2012, the Philippines recorded 10,514 cases of HIV, with 353 deaths.

The DOH also noted that the majority of these cases involved individuals aged 15 to 24.

According to the Department, more than half of the cases were identified only in the last three years[/b]A recent discovery in South Africa could herald a new approach to combating HIV and AIDS and creating an AIDS vaccine.

A “unique change” in the outer covering of the human immunodeficiency virus found in two HIV-positive women enabled them to generate antibodies that can kill up to 88 percent of HIV types from around the globe, the science news website Science Daily reported.

The discovery was made during a study conducted by members of the Center for AIDS Program of Research in South Africa (CAPRISA) consortium, including scientists from Wits University, the National Institute for Communicable Diseases (NICD) in Johannesburg, University of Kwa Zulu-Natal, and the University of Cape Town.

It was the CAPRISA team who discovered the women, from South Africa’s KwaZulu-Natal province, who could make these rare antibodies.

According to Science Daily, Wits and NICD researchers Dr. Penny Moore and Professor Lunn Morris discovered that glycan, a type of sugar, on the protein coat of the virus at a specific position forms a "site of vulnerability" in the virus and "enables the body to mount a broadly neutralizing antibody response."

It is a significant discovery, as “HIV is an especially tricky virus for vaccine developers,” said The Scientist magazine, as “HIV’s rapidly mutating genome allows it to evade immune attack by changing its appearance, preventing recognition by initially effective antibodies."

"Understanding this elaborate game of 'cat and mouse' between HIV and the immune response of the infected person has provided valuable insights into how broadly neutralizing antibodies arise," Moore said.

“We had always assumed the first virus would be special,” University of Amsterdam immunologist Hanneke Schujtemaker told The Scientist, but added that the new study now challenges this assumption.

"We were surprised to find that the virus that caused infection in many cases did not have this antibody target on its outer covering,” said Morris.

"But over time, the virus was pressured by [the] body's immune reaction to cover itself with the sugar that formed a point of vulnerability, and so allowed the development of antibodies that hit that weak spot," he added.

The hunt for the most effective vaccine

Scientists have long believed that "broadly neutralizing antibodies" (which defend a cell from an infectious body by neutralizing any effect it has biologically) are the key to making the perfect AIDS vaccine.

"This discovery provides new clues on how vaccines could be designed to elicit broadly neutralizing antibodies. The world needs an effective AIDS vaccine to overcome the global scourge of AIDS," said CAPRISA director Prof. Salim Abdool Karim.

Even if the existence of these types of antibodies has been known for a while, broadly neutralizing antibodies against HIV were only identified three years ago.

The new study found one mechanism by which these antibodies can be made.

According to the Science Daily Report, the research team had to study the target of some of these antibodies, glycan, to form a site of vulnerability. "By tracing back the evolution of the virus that elicited these antibodies, this team showed that this particular weak point was absent from the virus that first infected these women," the report said.

"[U]nder constant pressure from other less powerful antibodies that develop in all infected people, their HIV was forced to expose this vulnerability over time. This allowed the broadly neutralizing antibodies to develop," it added.

Moore told The Scientist magazine, “This is the first time we’ve really understood that viral evolution itself shapes the antibodies that come out."

“Being able to work out the pattern of viral evolution will help us think about designing vaccines,” she added.

Moore also told The Scientist magazine that one strategy that may prove successful could be to provide sequential immunizations with vaccines containing different epitopes (parts of antigens, which create antibodies) “mimicking what happens naturally” as the viruses evolve.

HIV in the Philippines

In a conference on Oct. 18, the Department of Health (DOH) reported that between 1984 and 2012, the Philippines recorded 10,514 cases of HIV, with 353 deaths.

The DOH also noted that the majority of these cases involved individuals aged 15 to 24.

According to the Department, more than half of the cases were identified only in the last three years.

http://www.gmanetwork.com/news/story/279520/scitech/science/unique-hiv-feature-might-be-key-to-new-vaccine-strategies-mdash-study
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by antontech(m): 6:55am On Oct 25, 2012
Lets hope they work on it to be approved worldwide
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Nobody: 9:00am On Oct 25, 2012
Quite impressive.using the 'prevention is better than cure' strategy...btw,what happened to Truvada?
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by ROCKJ1(m): 9:16am On Oct 25, 2012
Na wa ohhh.... Its so difficult to eradicate and yet so easy to acquire.
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Nobody: 9:17am On Oct 25, 2012
There is already a vaccine for HIV and its called CONDOMS!!!! fo.ols
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Anubiri(m): 9:30am On Oct 25, 2012
I hv a clue 2 d cure of HIV but I need sponsor $ equipments...
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Djtm(m): 9:32am On Oct 25, 2012
slyfoxxjoe: There is already a vaccine for HIV and its called CONDOMS!!!! fo.ols
Yeah put them on whenever you want to come in contact with sharp objects since HIV can only be transmitted in only one way. Wise man.

10 Likes

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Nobody: 9:35am On Oct 25, 2012
D solution to many chronic diseases is nutrition.but scientists fail to research into this.

1 Like

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Zazu04: 9:36am On Oct 25, 2012
click Like if you didn't read it to the end.
Quote if u want a summary

13 Likes

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by swizz01(m): 9:41am On Oct 25, 2012
slyfoxxjoe: There is already a vaccine for HIV and its called CONDOMS!!!! fo.ols


hahahahahahahahahahahahahahaa.............yure ryt ? grin grin grin grin[color=#770077][/color]
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Ariyke: 9:42am On Oct 25, 2012
Djtm:
Yeah put them on whenever you want to come in contact with sharp objects since HIV can only be transmitted in only one way. Wise man.
LOLZZZZ
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Finland(m): 9:57am On Oct 25, 2012
slyfoxxjoe: There is already a vaccine for HIV and its called CONDOMS!!!! fo.ols
You are the foo.l here. condoms breaks is that your own idea of vaccine?
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by donguutti: 10:04am On Oct 25, 2012
Hopefully, a possible vaccine but not a cure, another thing is to get the Goddamned virus not
to mutate into another form that might render the expected vaccine ineffective.One question i would
like to ask the researchers is if the women who produced these HIV killing antibodies are now, HIV negative
or Did the killing of the virus just reduced the viral load.

BTW too much repetition in the article seemed you ctrl V(pasted it) ,twice
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Javatar(m): 10:10am On Oct 25, 2012
Bros OP, thanks for the info but pls have mercy on UC Browser users like us by making sure the already long article is not repeated like 3 times......scrolling on this dude surely aint easy.....thanks anyways...it was quite informative.
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by proffmanue(m): 10:14am On Oct 25, 2012
Their findings cannot really work: How will they trick the virus in patients to expose the vulnerable glycan?
what they should do is "present the most constantly expressed HIV antigens to professional antigen presenting cells so that immune system can mount the right response.

1 Like

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by donguutti: 10:27am On Oct 25, 2012
" ^^
proffmanue: Their findings cannot really work: How will they trick the virus in patients to expose the vulnerable glycan?
what they should do is "present the most constantly expressed HIV antigens to professional antigen presenting cells so that immune system can mount the right response.
""""We were surprised to find that the virus that caused infection in many cases did not have this antibody target on its outer covering,” said Morris.

"But over time, the virus was pressured by [the] body's immune reaction to cover itself with the sugar that formed a point of vulnerability, and so allowed the development of antibodies that hit that weak spot," he added.""""
Probably by boosting the body's immune system(somehow) or reducing the viral load with retroviral drugs which also boost the immune system,
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by proffmanue(m): 10:43am On Oct 25, 2012
@donguutti:

d exposure of the gylcan may be as a result of mutation which the virus is good at.
how did the immune system trick d virus to expose this gylcan?

1 Like

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by DonaldGenes(m): 4:01pm On Oct 25, 2012
Anubiri: I hv a clue 2 d cure
of HIV but I need sponsor $ equipments...
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by DonaldGenes(m): 4:32pm On Oct 25, 2012
Anubiri: I hv a clue 2 d cure
of HIV but I need sponsor $ equipments...
I studied Genetics and I can authoritatively tell you that I can find a generic cure for HiV., you see,HIv isn't just push over virus! Its more of a very cunny and trickish kinda virus able to change its genetic code anytime it attaches itself on vulnerable antigenic receptor,all it does is to try to weaken the antigenic-antibodies thus reducing its powers to kill it!! Hiv is a Mutated genes,not just ordinary virus,as more antibodies like the most powerful Antibodies-complex "C4"or Nk killer cellers antibodies are being released once it detects a cell has been attacked,wch myt relsult into your CD4 count rate being low, so now I was thinking of if we can extract the genes of Whales(whales are the only mamal known to be resistant to any kind diesease in this world"we can incoorporate their genes with a Hiv patient own and sequence it genome and see what happens-this one area scientist haven't think of

Had it been we humans didn't have more of bacteria in our body that our White blood cells,it would have been a different scenario

1 Like

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by kinguwem: 5:40pm On Oct 25, 2012
While scientists worldwide are searching for the cure for HIV infection, nigerians who claim spiritual cure for the disease are sending ignorant patients to the grave. Honesty & sincerity of purpose is the only way this problem can be solved.

2 Likes

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Valiantvaliant(m): 12:14am On Oct 26, 2012
slyfoxxjoe: There is already a vaccine for HIV and its called CONDOMS!!!! fo.ols

OTTONDO!! Is it only through $ex that one gets Hiv?
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by chichiman: 1:26am On Oct 26, 2012
[size=14pt]Are scientists in Nigerian universities, like their counterparts in SA, concerned with breaking the HIV enigma code or they're simply busy publishing dodgy and plagiarised papers in low ranking journals in India, Pakistan and Ethiopia, yet getting promoted by clueless university administrators?[/size]

1 Like

Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by Heatblast(m): 1:36pm On Oct 26, 2012
Science is beautiful
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by tolabuttons(f): 12:07am On Oct 27, 2012
slyfoxxjoe: There is already a vaccine for HIV and its called CONDOMS!!!! fo.ols
. Haba!!! Are u kidding me? Mr, HIV is not transmitted by sexual intercourse only
Re: Unique HIV Feature Might Be Key To New Vaccine Strategies by MSQUARE28(m): 12:07pm On Apr 11, 2013
Wats d issue again abt HIV instead u prayn 4 Nigerian Govt

(1) (Reply)

Madagascar Cure:: Here Is The Plant Madagascar Use For Covid-19 Cure / COVID-19 Update For November 25 2020 In Nigeria / Graphi; Video /pic Of Maggot Infested Head Of A Lady After Using Brazilian Hair.

(Go Up)

Sections: politics (1) business autos (1) jobs (1) career education (1) romance computers phones travel sports fashion health
religion celebs tv-movies music-radio literature webmasters programming techmarket

Links: (1) (2) (3) (4) (5) (6) (7) (8) (9) (10)

Nairaland - Copyright © 2005 - 2024 Oluwaseun Osewa. All rights reserved. See How To Advertise. 77
Disclaimer: Every Nairaland member is solely responsible for anything that he/she posts or uploads on Nairaland.