Human immunodeficiency virus infection immune system

Lores P, Boucher V, Mackay C, Pla M, Von Boehmer H, Jami J, Barre-Sinoussi E, Weill JC (1992) Expression of human CD4 in transgenic mice does not confer sensitivity to human immunodeficiency virus infection. AIDS Res Hum Retroviruses 8 2063-2071 Maddon PJ, Dalgleish AG, McDougal JS, Clapham PR, Weiss RA, Axel R (1986) The T4 gene encodes the AIDS virus receptor and is expressed in the immune system and the brain. Cell 47 333-348... 

Barohn RJ, Gronseth GS et al (1993) Peripheral nervous system involvement in a large cohort of human immunodeficiency virus-infected individuals. Arch Neurol 50(2) 167-171 Behar R, Wiley C et al (1987) Cytomegalovirus polyradiculoneuropathy in acquired immune deficiency syndrome. Neurology 37(4) 557-561... 

Immunocompromised A condition in which the immune system is not functioning normally. This condition is seen in the very young, the very old, human immunodeficiency virus-infected individuals, and in transplant patients. An immunocompromised person is susceptible to opportunistic infections. 

At or after age 30, women with three consecutive normal tests may be screened at less frequent intervals (every 2-3 years). Alternatively, HPV DNA testing and conventional or liquid-based testing could be performed every 3 years. Women at high risk (e.g., human immunodeficiency virus infection or weak immune system) may be screened more frequently. Women over the age of 70 years may stop screening if they have three normal tests in the last 10 years. 

The viruses responsible for AIDS are human immunodeficiency virus 1 and 2 (HIV 1 and HIV 2) Both are retroviruses, meaning that their genetic material is RNA rather than DNA HI Vs require a host cell to reproduce and the hosts m humans are the T4 lymphocytes which are the cells primarily responsible for inducing the immune system to respond when provoked The HIV penetrates the cell wall of a T4 lymphocyte and deposits both its RNA and an enzyme called reverse transcriptase inside There the reverse transcriptase catalyzes the formation of a DNA strand that is complementary to the viral RNA The transcribed DNA then serves as the template from which the host lymphocyte produces copies of the virus which then leave the host to infect other T4 cells In the course of HIV reproduction the ability of the T4 lymphocyte to reproduce Itself IS compromised As the number of T4 cells decrease so does the body s ability to combat infections... 

Human Immunodeficiency Virus. Human immunodeficiency vims (HIV) causes Acquired Immunodeficiency Syndrome (AIDS), which has no cure. HIV infects the cells of the human immune system, such as T-lymphocytes, monocytes, and macrophages. After a long period of latency and persistent infection, it results in the progressive decline of the immune system, and leads to full-blown AIDS, resulting in death. 

In patients infected with HIV (human immunodeficiency virus), the helper cell population is weakened to the point where the immune system is no longer able to function properly. The body thus becomes susceptible to otherwise nonlethal diseases such as pneumonia. 

Infection with a human immunodeficiency virus (HIV-1 and HIV-2 see Chapter 3) can cause the destruction of the TH cell, which is the eritieal eell of the immune system. This leads to the condition known as acquired immune deficieney syndrome (AIDS). At present, it is still not known why, in some cases, infection with HIV leaves the immune system intact whereas in others it is irreversibly destroyed, giving rise to AIDS. 

The acquired immune deficiency syndrome (AIDS) was first recognized in 1981, and described in a cohort of young homosexual men with significant immune deficiency. Since then, human immunodeficiency virus type 1 (HIV-1) has been clearly identified as the major cause of AIDS.1 HIV-2 is much less prevalent than HIV-1, but also causes AIDS. HIV primarily targets CD4+ lymphocytes, which are critical to proper immune system function. If left untreated, patients experience a prolonged asymptomatic period followed by rapid, progressive immunodeficiency. Therefore, most complications experienced by patients with AIDS involve opportunistic infections and cancers. 

There is clear evidence linking defects of the immune system to the development of NMSC. For example, it is observed that patients receiving chronic immunosuppressant therapy for organ transplantation have a 50% risk of developing SCC within 20 years of transplantation, and 30% of these cancers are highly aggressive.21 Additionally, patients with human immunodeficiency virus (HIV) infection are predisposed to melanoma.18 Data also support the idea that UV radiation... 

Live vaccines rarely may cause severe or fatal reactions as a result of uncontrolled replication (growth) of the vaccine virus. This may occur in persons with weak immune systems, including persons with leukemia or human immunodeficiency virus (HIV) infection or persons undergoing treatment with certain drugs. This is why it is so important to know a person s health status before giving a live vaccine. 

The genetic material in a retrovirus is RNA not DNA. The best known retrovirus is the human immunodeficiency virus (HIV) which infects lymphocytes and hence interferes with the immune system, giving rise to the disease AIDS. Once the virus infects its host, it converts its RNA into DNA by an enzyme known as reverse transcriptase and the DNA is then inserted into the genome of the host cell (in this case the lymphocyte) ... 

Another target defined for anionized albumins are cells of the immune system that have been infected with the human immunodeficiency virus (HIV). Suc-HSA and Aco-HSA are potent inhibitors of HIV-1 repheation in vitro [48]. Thus, auionized albumins can be regarded as pharmacologicaUy active proteins, that can be used either as such, or as dual-active cou-... 

Secondary immunodeficiencies (9) are much more common than primary ones and frequently occur as a result of immaturity of the immune system in premature infants, immunosuppressive therapy, or suigery and trauma. Illnesses, particularly when prolonged and serious, have been associated with secondary immunodeficiencies, some of which may be reversible. Acquired immune deficiency syndrome (AIDS) (10—12) may be considered a secondary immunodeficiency disease caused by the human immunodeficiency viruses HIV-1 or HIV-2. Hitherto unknown, the disease began to spread in the United States during the latter part of the 1970s. The agent responsible for this infection has been isolated and identified as a retrovirus. 

The human immunodeficiency virus (HIV) is a retrovirus. It infects (and normally kills) helper T lymphocytes that are a vital part of the immune system (see Topic Dl). This greatly impairs the immune system and may lead to acquired immune deficiency syndrome (AIDS). However, the HIV virus can also exist in a dormant state in T cells as a provirus until activated to enter the lytic cycle at a later time. The existence of this dormant state makes it difficult to design an effective strategy to overcome the HIV virus in an infected individual. 

Infection with human immunodeficiency virus-1 (HIV-1) can destroy the immune system and lead to AIDS the virus can induce severe and debilitating neurological problems as well (Ellis et al., 1997 Kaul et al., 2001, 2005 ... 

For a number of overt, broad spectrum immunosuppressive xenobiotics (e.g., azathioprine) there is sufficient clinical experience to indicate the types of neoplasms for which there is an increased risk. These tumor types are listed in Table 27.1. Also listed are the tumors that occur in the unfortunate experiment of nature, namely patients infected with human immunodeficiency virus type 1 (HIV-1) and the tumors that may occur at higher incidence with more selective yet strong immunosuppressants (e.g., cyclosporin, sirolimus, and tacrolimus). Compared to the broad spectrum immunosuppressive agents listed above, most IMBPs express a highly selective regulatory influence on the immune system modulating the activity of host defense systems rather than mediating frank immunosuppression. 

Acquired immunodeficiency syndrome (AIDS), a degenerative disease of the immune system, is caused by the human immunodeficiency virus (HIV) and results in life-threatening opportunistic infections and malignancies. Antiviral and im-munomodulating natural products have been investigated as treatments for AIDS (111). 

The retrovirus destroys the immune system, resulting in human immunodeficiency virus (HIV). An HIV patient develops acquired immunodeficiency syndrome (AIDS) when the retrovirus becomes active and results in opportunistic infection and malignant neoplasm. 

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