wazua Sun, Dec 7, 2025
Welcome Guest Search | Active Topics | Log In

Can HIV control LEUKEMIA?
selah
#1 Posted : Friday, February 05, 2010 5:59:27 AM
Rank: Elder


Joined: 10/13/2009
Posts: 1,950
Location: in kenya
Since leukemia is over production of white blood cells and HIV attacks the white blood cells therefore reducing your immunity.

Can some one suffering from this cancer of the blood find relief from an injection of HIV.
'......to the acknowledgment of the mystery of God, and of the Father, and of Christ; 3 In whom are hid all the treasures of wisdom and knowledge.' Colossians 2:2-3
Waria
#2 Posted : Friday, February 05, 2010 7:06:53 AM
Rank: Member


Joined: 10/11/2007
Posts: 213
Now this is the problem of too much logic aka over thinking as a result of years of drilled schooling and online MBAs
poundfoolish
#3 Posted : Friday, February 05, 2010 8:45:59 AM
Rank: Elder


Joined: 12/2/2009
Posts: 2,458
Location: Nairobi
i like the thoughting though...
Selah tell us more
simonkabz
#4 Posted : Friday, February 05, 2010 10:08:16 AM
Rank: Elder


Joined: 3/2/2007
Posts: 8,776
Location: Cameroon
Hmmm...quite some thinking there!
TULIA.........UFUNZWE!
Djinn
#5 Posted : Friday, February 05, 2010 2:04:44 PM
Rank: Elder


Joined: 11/13/2008
Posts: 1,565
@waria - thinking like Selah is doing is what gives us both medical advances and hollywood blockbusters like Avatar...

good one Selah - maybe research a bit more - I recall reading abt T-Helper cells and CD4 etc etc...maybe its just one type of cell?
BGL
#6 Posted : Friday, February 05, 2010 7:19:00 PM
Rank: Veteran


Joined: 10/11/2009
Posts: 1,223
There is a link and its an aspect my research group has been following. However, HIV is a lethal virus so an injection of it to cure/control Leukemia will be the most ridiculous decision in science at this point in time. The work was published last year in New England Journal of Medicine, a journal with the highest 'impact factor' in medical sciences for the people who may be interested. As point of information do people know that there are group of people who cannot be infected with the viral strain that causes most of the primary infection (CCR5 virus). Unfortunately homozygotes are a small percentage of caucasian origin and in this population CCR5 viruses which seed most of the primary infections bounces off although rarely these group of people can be infected by the CXCR4 virus. However in Kenya we have a strain (D) which behaves exactly the opposite using CXCR4 early in infection and causing death rather faster.

Those interested in the scientific details can continue.............. it is also worthy noting that a follow up technology in phase 2 of trial creates a situation whereby we can isolate the non-infected CD4 T cells using various technologies from the patient, knock-down the CCR5 gene using zinc finger technology so that the protein is not expressed on cell surface, grow the cells in culture and back to the patient when we achieve approximately 1million cells per mm3. This way HIV is rather a chronic than a fatal disease.

Plagiarism is never tolerated in my profession so i present a case study and quote the author at the end.
'' A 40-year-old white man with newly diagnosed acute myeloid leukemia (FAB M4 subtype,with normal cytogenetic features) presented to our hospital. HIV-1 infection had been diagnosed more than 10 years earlier, and the patient had been treated with HAART (600 mg of efavirenz, 200 mg of emtricitabine, and 300 mg of tenofovir per day) for the previous 4 years, during which no illnesses associated with the acquired immunodeficiency syndrome (AIDS) were observed. At the time that acute myeloid leukemia was diagnosed, the patient’s CD4 T-cell count was 415 per cubic millimeter, and HIV-1 RNA was not detectable (stage A2 according to classification by the Centers for Disease Control and Prevention). Initial treatment of the acute myeloid leukemia consisted of two courses of induction chemotherapy and one course of consolidation chemotherapy.
During the first induction course, severe hepatic toxic effects developed and renal failure occurred. Consequently, HAART was discontinued, leading to a viral rebound (6.9×106 copies of HIV-1 RNA per milliliter). The therapy was resumed immediately, before a viral steady state was reached, and 3 months later, HIV-1 RNA was undetectable. Seven months after presentation, acute myeloid leukemia relapsed, and the patient underwent allogeneic stem-cell transplantation with CD34+ peripheral-blood stem cells from an HLA-identical donor who had been screened for homozygosity for the CCR5 delta32 allele. The patient provided informed consent for this procedure, and the protocol was approved by the institutional review board. The HLA genotypes of the patient and the donor were identical at the following loci: A*0201; B*0702,3501; Cw*0401,0702; DRB1*0101,1501; and DQB1*0501,0602. The patient underwent a conditioning regimen and received a graft containing 2.3×106 CD34+ cells per kilogram of body weight.5 Prophylaxis against graft-versus-host disease consisted of 0.5 mg of rabbit antithymocyte globulin per kilogram 3 days before transplantation, 2.5 mg per kilogram 2 days before, and 2.5 mg per kilogram 1 day before. The patient received two doses of 2.5 mg of cyclosporine per kilogram intravenously 1 day before the procedure and treatment with mycophenolate mofetil at a dose of 1 g three times per day was started 6 hours after transplantation. HAART was administered until the day before the procedure, and engraftment was achieved 13 days after the procedure. Except for the presence of grade I graft-versus-host disease of the skin, which was treated by adjusting the dosage of cyclosporine, there were no serious infections or toxic effects other than grade I during the first year of follow-up. Acute myeloid leukemia relapsed 332 days after transplantation, and chimerism transiently decreased to 15%.
The patient underwent reinduction therapy with cytarabine and gemtuzumab and on day 391 received a second transplant, consisting of 2.1×106 CD34+ cells per kilogram, from the same donor, after treatment with a single dose of whole-body irradiation (200cGy). The second procedure led to a complete remission of the acute myeloid leukemia, which was still in remission at month 20 of follow-up.

Hutter G et al., 2009.
History will not remember you for your IQ. It will remember you for what you did. “Genius is 1 percent inspiration, 99 percent perspiration.” Thomas Edison
sparkly
#7 Posted : Saturday, February 06, 2010 6:39:55 AM
Rank: Elder


Joined: 9/23/2009
Posts: 8,083
Location: Enk are Nyirobi
@BGL interesting. Whats the thrust of the case study... In english pls
Life is short. Live passionately.
Babygal
#8 Posted : Saturday, February 06, 2010 8:32:11 PM
Rank: Member


Joined: 5/29/2008
Posts: 26
this can be the best thing to happen if it were possible!
When a person can no longer laugh at himself, it is time for others to laugh at him.

Thomas Szasz, "The Second Sin"
BGL
#9 Posted : Sunday, February 07, 2010 12:36:46 PM
Rank: Veteran


Joined: 10/11/2009
Posts: 1,223
Actually the biggest fight we have with HIV currently is how to thrash it out from its hide-outs. The current HAART regimen has been successful in suppressing HIV replication to below detection limits but once the HAART is stopped viral load rebounds. What this means is that HAART is a life long therapy which may prove toxic in the long run.
In the recent years we have been able to map out the hotspots for integration for HIV we will work on enzymes that reverse the epigenome that favours integration then suppress the virus with HAART. The problem is that we already have the map of human genome and acetylation and methylation of this sites may awaken some cancer genes which we are yet to identify. So, the war against HIV is long from being won but we are not relenting.
As a parting shot and a deviation from the main subject its worthy noting that the best opportunity to prevent HIV disease clearly lies at the sites of mucosal entry, and investigations to directly counterattack HIV infection must continue to focus on these portals. That best explains why male circumcision is one of the best strategies ever that can reduce HIV acquisition.
History will not remember you for your IQ. It will remember you for what you did. “Genius is 1 percent inspiration, 99 percent perspiration.” Thomas Edison
selah
#10 Posted : Monday, February 08, 2010 5:22:28 AM
Rank: Elder


Joined: 10/13/2009
Posts: 1,950
Location: in kenya
@BGL
YOur explanation was quite thorough but to deviate abit, what makes the HIV virus unreachable in the hideout by your treatment?
'......to the acknowledgment of the mystery of God, and of the Father, and of Christ; 3 In whom are hid all the treasures of wisdom and knowledge.' Colossians 2:2-3
BGL
#11 Posted : Monday, February 08, 2010 6:23:34 AM
Rank: Veteran


Joined: 10/11/2009
Posts: 1,223
@Sellah
All the HAART drugs target a protein of the virus. Proteins are expressed on active cells. Resting cells are the fraction that harbours the intergrated provirus, in their inactive site they are "out of the radar". Currently i am working on cloning the cytoplasmic domain of the envelope that is responsible for retrograde transport from the cell surface to the trans golgi network that making the HIV - virus a master of disguise......... hiding itself from the immune surveillance of the body.
History will not remember you for your IQ. It will remember you for what you did. “Genius is 1 percent inspiration, 99 percent perspiration.” Thomas Edison
Intelligentsia
#12 Posted : Monday, February 08, 2010 6:57:01 AM
Rank: Elder


Joined: 10/1/2009
Posts: 2,436
Very interersting discussion @ Selah you have brought up, and more dope given by BGL.

@ BGL, I have always wondered something: If a mosquito feeds on the blood of a sero-positive person, and proceeds to later bite a HIV-ve person, the negative person does NOT contract HIV, otherwise a good no. of us would be positive!

Ergo, it follows that something happens to the blood of the HIV+ person in the mosquito's digestive tract that makes it lose its ability to infect the negative person, its ability to attach to the CD4 cells of the negative subject. What is this? Is it a chemical - is it in the mosquito's salive, digestive enzymes? Or? Because am thinking (the layman that I am,remember) that if we can isolate this chemical them we could be staring at the cure or vaccine of HIV. Is there a flaw, a lacunae in this line of thinking? What say you?

BGL
#13 Posted : Monday, February 08, 2010 12:49:05 PM
Rank: Veteran


Joined: 10/11/2009
Posts: 1,223
@ Intelligentsia…. Viruses including HIV survive in hosts, some hosts are compatible while others are not. In that case mosquitoes are not compatible hosts for HIV... period. But a point of information which may be useful. Worldwide infection rate with HIV-1 is estimated at 14,000 per day but millions are exposed to the virus and this may be explained by thousands of discordant couples where the virus has a chance to infect but it does not. Transmission probability per exposure event explains why HIV is transmitted with moderate efficiency (1 in 200-1 in 2000) by heterosexual sex and apparently greater efficiency through the intestinal tract @ 1 in 20-1 in 300 via semen and upto 95 in 100 in drug users via contaminated sharps.

For a HIV infection to be productive and systemic three factors are very critical (i) Viral load of the donor, in this case millions of sperms implies greater genetic diversity hence increased chances (fitness) because out of the millions very few perhaps only one seed the infection. (ii) Availability of target cells at the site of infection. (iii) Cellular phenotype (Naïve or memory) with HIV preferring memory in most mucosal sites (vagina and rectum).
History will not remember you for your IQ. It will remember you for what you did. “Genius is 1 percent inspiration, 99 percent perspiration.” Thomas Edison
mburuke
#14 Posted : Monday, February 08, 2010 1:15:02 PM
Rank: Member


Joined: 10/3/2008
Posts: 106
Thanks BGL for the insight am wondering
rather than target the replication/polymerase enzyme
which is only expressed in active cells during replication why cant the activity/experssion of enzyme involved in intergration of the virus into the hosts DNA? be silenced and maybe address the issue of the virus remaining dormant and undetected.
One's first step in wisdom is to question everything - and one's last is to come to terms with everything
BGL
#15 Posted : Monday, February 08, 2010 3:46:43 PM
Rank: Veteran


Joined: 10/11/2009
Posts: 1,223
@ mburuke: Immunosuppressants + HAART combinations has been proposed to decrease the activation of CD4+ T cells and reduce their susceptibility to viral infection and replication with a cyclosporine A producing interesting results in a controlled clinical trial. However, drug withdrawal causes viral load to return to basal levels. But my position is that general use of immunosuppressants is not justified because of their toxicity.

On the same note, In the laboratory (in vitro) we can design miRNAs which could be involved in maintaining HIV latency or in controlling low ongoing viral replication. However, the dynamics in human body are completely different. HIV dominates the proceedings through strategies that overcome the cellular miRNA restriction machinery or enhance the expression of certain favourable miRNAs to achieve its replication.

By the way, as at dec 2009 we had 25 different active compounds belonging to 6 different drug families that have been developed and approved. However, regardless of the use of all these, a cure is NOT YET ACHIEVABLE.
History will not remember you for your IQ. It will remember you for what you did. “Genius is 1 percent inspiration, 99 percent perspiration.” Thomas Edison
Users browsing this topic
Guest
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Copyright © 2025 Wazua.co.ke. All Rights Reserved.