Complete recovery is possible? HIV and stem cells

     After the success of antiretroviral therapy for HIV by the scientific community had the next goal - to develop the means to completely rid the body of the virus. That this is possible at all, it became clear after the event, Timothy Brown, who has been HIV-positive for as long as he in 2007 was not transplanted donor stem cells for the treatment of leukaemia. As a result, his body is completely rid of HIV, including the fact that the donor cells lacked a key receptor required for virus entry into the cell.   

      At the Washington conference was addressed by infectious disease hospital of the Boston Brigham and Women's  (Timothy Henrich). He spoke of two of their HIV-positive patients who were transplanted stem cells, which present the same receptor. In addition, prior to transplantation, they were smaller than Brown, the dose of chemotherapy, and during the procedure, patients Henricha, unlike Brown, continued receiving antiviral drugs.     

      Stem cells do not take effect immediately, but ten months after transplantation, both patients were found in the blood of any traces of HIV.After transplantation, the two men developed the disease "graft-versus-host" when donor immune cells attack the cells of the "host", which they recognize as foreign. Believed Henrich and his colleagues, it is a state helped the patient's body to get rid of HIV - antivirals protected donor cells from the virus, and then destroy healthy cells Infected "master" cells. Currently the team Henricha watching cure HIV patients, as a key moment in the story is the following: does status quo after withdrawal of antiviral drugs.

"Soap Opera" and HIV prevention in women

      Daily Pageviews educational series can significantly affect the sexual behavior of women, says an expert on HIV Rachel Jones of Rutgers University (Newark, NJ). She presented at the conference filmed by her and her colleagues, 12-episode "soap opera" called "Love, sex, and choice," promotes safer sexual behavior. According to Jones, this show spectators standing at 19 percent less likely to engage in risky sex (meaning, unprotected sex with casual partners or drug use) than women in the control group receiving SMS-messages about the dangers of such behavior.

      The four characters of this film Jones, by analogy with the TV series "Love in the City", are in precarious situations with their relationships with the opposite sex, in which they must make the right choice. "Women love the video - said Jones. - They are reviewed by a series of two or three times."

Symptomatic HIV infection before the development of AIDS

Group IV Symptomatic HIV infection before the development of AIDS

    The progression of HIV infection is a result of a decline in immune competence that occurs due to increased replication of HIV from sites where it has been latent. The exact triggers for this reactivation are poorly understood.
    As the disease progresses, infected persons may suffer from constitutional symptoms, skin and mouth problems and haematological disorders, many of which are easy to treat or alleviate. A decrease in viral load in response to the introduction of antiviral therapy often corresponds to a complete or partial resolution of these symptoms.

Indications for lymph node biopsy

 Indications for lymph node biopsy

 • Constitutional symptoms
• Painful nodes
• Asymmetrical enlargement
• Sudden increase in size
• Hilar lymphadenopathy

Persistent generalised lymphadenopathy

   Group III Persistent generalised lymphadenopathy

    Persistent generalised lymphadenopathy may be a presenting feature of HIV infection in a person who is otherwise well. HIV-related lymphadenopathy persists for at least three months, in at least two extra-inguinal sites and is not due to any other cause.

    A lymph node biopsy in HIV disease is not recommended as a routine procedure as the findings are non-specific and the presence of lymphadenopathy due to HIV alone does not worsen the prognosis. The indications for a biopsy are the same in HIV and non-HIV-related conditions.

Asymptomatic infection

     Group II  Asymptomatic infection

     After PHI, HIV antibodies continue to be detectable in the blood. The amount of virus in blood and lymphoid tissues falls to very low levels and the rate of HIV replication is slow although it does not cease. CD4 lymphocyte counts are within normal limits or generally above 350 cells/mm3. This phase may persist for 10 years or more.

     The decision to treat is made on the basis of the CD4 count and the viral load. The aim of therapy is to maintain immune function by suppressing viral replication to prevent further damage to the immune system. As for PHI treatment, the potential gain of therapy must be weighed against the potential risks and uncertainties.

Group I Primary HIV infection

Group I   Primary HIV infection

      Primary HIV infection (PHI) is also called the seroconversion illness or acute HIV infection. It represents the stage of infection after the acquisition of the virus when antibodies are developing as shown in Figure 4.1. Between 25% and 65% of people have been found to present with symptoms at the time of seroconversion. These can range from a mild, glandular feverlike illness to an encephalopathy. Common symptoms and signs are shown in Box 4.2. The severe symptoms are rare. The differential diagnosis of the mild seroconversion illness is protean and, without a high index of suspicion and a history indicating relevant risk behaviours or factors, the diagnosis may be missed.

     The appropriate diagnostic tests for PHI, which should be carried out on serial blood samples, include tests for HIV antibodies and antigen. If these are negative and PHI is suspected, the definitive test is an HIV RNA PCR, which is the most sensitive test for the detection and quantification of the virus. Some of these assays are not routine and the interpretation of investigation results during PHI is difficult, therefore close consultation with colleagues in virology is strongly advised. At the time of PHI there is sometimes a high rate of viral replication, leading to a transient rise in HIV viral load and concomitant immunosuppression due to a short-lived fall in the CD4 count. This may result in manifestations of HIV disease which are normally seen later in the infection, for example oral candida. Diagnostic confusion as to the stage of HIV infection may arise, which can only be resolved by following up the patient for long enough to see the symptoms and signs resolve, HIV antibodies appear, the viral load fall and the CD4 count rise.

     Treatment should be directed at alleviating any symptoms, and there is considerable interest in the possible use of antiretroviral agents at this time because the virus may be more susceptible due to the relatively low numbers of virus particles which can replicate, the reduced ability of the predominantly non-syncytium-inducing strains of virus to infect a wide variety of cell types and the enhanced immune response seen in PHI. Such treatment may decrease long-term damage to the immune system and delay or even prevent the development of AIDS.

      However, if not started within 12–18 months of PHI the theoretical advantage may be lost and, in any case, has to be balanced against the uncertain outcome, drug toxicity, adherence difficulties and the possibility of developing resistant virus, limiting future treatment options.