Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0021051 (immunodeficiency)
 71,517 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Infection with the human immunodeficiency virus (HIV) results in progressive depletion of the CD4 subset T-lymphocytes and the development of opportunistic infections and certain malignancies. Charts were reviewed for 185 HIV-infected individuals with 265 AIDS-defining illnesses (ADIs) who had T-lymphocyte subset analyses performed within 2 months prior to or 1 month following the diagnosis. Also included were 22 HIV-infected patients with oral candidiasis and 20 with asymptomatic infection. Significant differences in CD4 lymphocyte numbers were observed between the 12 ADIs, oral candidiasis, and asymptomatic infection, allowing them to be grouped into five general categories, based on mean CD4 count: (a) asymptomatic infection, CD4 greater than 500/mm3; (b) oral candidiasis and tuberculosis, range 250-500/mm3; (c) Kaposi's sarcoma, lymphoma, and cryptosporidiosis, range 150-200/mm3; (d) Pneumocystis carinii pneumonitis, disseminated Mycobacterium avium complex, herpes simplex ulceration, toxoplasmosis, cryptococcosis, and esophageal candidiasis, range 75-125/mm3; (e) cytomegalovirus retinitis, less than 50/mm3. Our data concur with clinical impressions and provide a basis for interim treatment and prophylaxis recommendations.
 ...
PMID:Predictive value of CD4 lymphocyte numbers for the development of opportunistic infections and malignancies in HIV-infected persons. 167 19

Cell lines derived from Kaposi sarcoma lesions of patients with AIDS (AIDS-KS cells) produce several cytokines, including an endothelial cell growth factor, interleukin 1 beta, and basic fibroblast growth factor. Since exposure to human immunodeficiency virus increases interleukin 6 (IL-6) production in monocytes and endothelial cells produce IL-6, we examined IL-6 expression and response in AIDS-KS cell lines and IL-6 expression in AIDS Kaposi sarcoma tissue. The AIDS-KS cell lines (N521J and EKS3) secreted large amounts of immunoreactive and biologically active IL-6. We found both IL-6 and IL-6 receptor (IL-6-R) RNA by slot blot hybridization analysis of AIDS-KS cells. The IL-6-R was functional, as [3H]thymidine incorporation by AIDS-KS cells increased significantly after exposure to human recombinant IL-6 (hrIL-6) at greater than 10 units/ml. When AIDS-KS cells (EKS3) were exposed to IL-6 antisense oligonucleotide, cellular proliferation decreased by nearly two-thirds, with a corresponding decrease in the production of IL-6. The decrease from IL-6 antisense in AIDS-KS cell proliferation was reversed by the addition of hrIL-6. We confirmed that AIDS-KS cells produced IL-6 in vivo by preparing RNA and tissue sections from involved and uninvolved skin from a patient with AIDS Kaposi sarcoma. We detected immunoreactive IL-6 in the involved tumor areas and to a lesser extent in the surrounding normal epidermis. Slot blot hybridization showed a great excess of IL-6 and IL-6-R RNA in involved skin compared to uninvolved skin. These results show that both IL-6 and IL-6-R are produced by AIDS-KS cells and that IL-6 is required for optimal AIDS-KS cell proliferation, and they suggest that IL-6 is an autocrine growth factor for AIDS-KS cells.
 ...
PMID:AIDS Kaposi sarcoma-derived cells produce and respond to interleukin 6. 169 29

The clinical findings of patients with oral Kaposi's sarcoma are reviewed. These oral findings commonly included candidiasis, hairy leukoplakia, gingivitis associated with human immunodeficiency virus (HIV), periodontitis, and other symptoms, including xerostomia. The other common symptoms of HIV disease that may be of importance in leading to a diagnosis are reviewed in this patient group. Treatment by local radiotherapy or by intralesional vinblastine of these oral Kaposi's sarcomas resulted in successful palliation, with more than 50% regression of the lesions in 80% of the patients treated.
 ...
PMID:HIV infection: clinical features and treatment of thirty-three homosexual men with Kaposi's sarcoma. 170 95

Kaposi's sarcoma (KS) is a malignant neoplasm that develops in 20% to 30% of all acquired immunodeficiency syndrome (AIDS) cases. Kaposi's sarcoma primarily involves the skin, but can progress to involve the lungs, gastrointestinal tract, and liver. alpha-Interferon alone or in combination with zivoduvine has activity in acquired immunodeficiency syndrome-related KS, especially in patients with limited disease and CD4 lymphocyte counts over 400/mm3. Patients with progressive or symptomatic visceral disease, however, can be treated more effectively with cytotoxic chemotherapy. We have used a combination of doxorubicin, bleomycin, and vincristine (ABV) and have achieved response rates of over 80%. Discontinuation of therapy, however, is associated with relapse shortly after response (2 to 3 months). Thus, we have begun studies to define a safe and effective maintenance therapy. Such therapies should include antiretroviral agents since most patients succumb to other human immunodeficiency virus complications, and since human immunodeficiency virus directly, through viral proteins, and indirectly, through the induction of cellular genes, induces KS growth. Additionally, agents with antitumor activity and possible antiviral activity, such as alpha-interferon, may be potentially effective in maintenance therapies. We recently studied 21 patients in a phase I study of recombinant interferon alpha-2b (INTRON-A, Schering-Plough Corp, Kenilworth, NJ) alone following ABV chemotherapy. A dose of 10 million units, given in daily subcutaneous injections, was the maximal tolerated dose; higher doses were associated with intolerable fatigue, diarrhea, and fevers. We are currently conducting a phase I/II trial studying the combination of zivoduvine (500 mg/d) and recombinant interferon alpha-2b (5, 10, and 15 million units) as maintenance in patients with advanced or progressive KS.
 ...
PMID:Phase I/II trials of alpha-interferon alone or in combination with zidovudine as maintenance therapy following induction chemotherapy in the treatment of acquired immunodeficiency syndrome-related Kaposi's sarcoma. 171 42

The recombinant cytokines are increasingly important therapeutic agents for patients with AIDS. Recombinant interferon-alpha has demonstrated antitumor and antiretroviral activities in patients with Kaposi's sarcoma. Limited studies with interferon-beta suggest that it also has antitumor effects in patients with Kaposi's sarcoma, but interferon-gamma appears to be ineffective in controlling this tumor. The hematopoietic growth factors, including erythropoietin, granulocyte colony-stimulating factor (G-CSF), and granulocyte-macrophage colony-stimulating factor (GM-CSF), have been evaluated in several populations of human immunodeficiency virus (HIV)-infected individuals. The combination of G-CSF and recombinant human erythropoietin completely reversed the zidovudine-induced neutropenia of AIDS patients but was only partially effective in reversing anemia. In several clinical trials, GM-CSF induced marked increases in leukocyte counts and improved neutrophil function in some AIDS patients. In severely immunocompromised patients with disease caused by HIV who were receiving therapy with either G-CSF or GM-CSF, opportunistic infections continued to occur despite increases in circulating white blood cell counts. Recombinant cytokines may be used in the future in AIDS patients as adjunctive treatment with myelosuppressive antibiotics and chemotherapeutic drugs, as a possible means of enhancing host defense, or as agents of immune reconstitution.
 ...
PMID:Use of recombinant interferons and hematopoietic growth factors in patients infected with human immunodeficiency virus. 196 13

The concept of the mononuclear phagocyte system (MPS) as advanced by van Furth et al. does not embrace other cell types which by virtue of their accessory cell function are inextricably linked to the immune response. Therefore, a modified functional definition of reticuloendothelial system (RES) encompassing the non-lymphatic effector and accessory cells of the immune response, i.e. monocytes/-macrophages, follicular and interdigitating reticulum cells as well as endothelial cells is proposed. In addition to their morphologic and functional characteristics, their behaviour in the setting of human immunodeficiency virus (HIV) infection is discussed. As examples serve the role of RES cells as target cells and reservoirs for HIV and their dysfunctions with regard to different HIV-associated conditions, e.g. tuberculosis and Kaposi's sarcoma.
 ...
PMID:[The reticuloendothelial system in immunodeficiency]. 172 32

We retrospectively compared the results of 67Ga chest scans and 99mTc-DTPA aerosol clearance measurements with those of fiberoptic bronchoscopy in 88 patients infected with the human immunodeficiency virus. Of 100 investigations, a pulmonary infection was diagnosed in 39, mainly Pneumocystis carinii pneumonia and a noninfectious disorder was found in 42, mainly Kaposi's sarcoma and lymphocytic alveolitis. Gallium scans and DTPA clearance were abnormal respectively in 74% and 92% of infectious complications, and in 12% and 60% of noninfectious disorders. In 10 cases, DTPA clearance was accelerated, while chest x-ray, arterial blood gases and even gallium scanning were normal. A value of DTPA clearance greater than 4.5%.min-1 was both sensitive and specific for the diagnosis of Pneumocystis carinii pneumonia. The gallium scan was always normal in bronchopulmonary Kaposi's sarcoma. We conclude that in symptomatic patients: (1) DTPA clearance measurements are useful for detecting lung disease when chest x-ray and/or PaO2 are normal and (2) a gallium scan is indicated to distinguish progressive Kaposi's sarcoma from a superimposed second process when radiological abnormalities of pulmonary Kaposi's sarcoma are present.
 ...
PMID:Technetium-99m-DTPA aerosol and gallium-67 scanning in pulmonary complications of human immunodeficiency virus infection. 173 Oct 2

To investigate the influence of HLA specificities on the rate of progression and outcome of human immunodeficiency virus (HIV) infection, we performed (a) a case-control study in 1989-1990 of HIV-seropositive individuals stratified by both risk behavior and ethnic background, (b) a longitudinal cohort study of HIV-infected male homosexuals enrolled in 1981-1982, and (c) an analysis of individuals with a diffuse infiltrative CD8 lymphocytosis syndrome. In the case-control study, there was a significantly higher frequency of HLA-B35 among intravenous drug users, but not homosexuals, who developed illnesses meeting the case definition for AIDS compared with asymptomatic HIV-positive controls, regardless of ethnic status. In the longitudinal study, HLA-B35-positive homosexuals had a significantly increased rate of progression to AIDS and decreased survival over a 7-year period compared with those without this specificity. Finally, there was a significantly decreased frequency of HLA-B35 in individuals with the diffuse infiltrative lymphocytosis syndrome, a clinically and genetically distinctive disorder occurring in HIV infection in which a low rate of progression to opportunistic infections was found. The high rate of salivary and lacrimal gland lymphoma in this group suggests that there is dissociation between the presence of HLA-B35 and the development of particular AIDS-defining conditions. We conclude that HLA-B35 is a risk factor for more rapid progression to AIDS, particularly opportunistic infections and Kaposi's sarcoma, operating in groups with high rates of newly acquired HIV infections such as New York City male homosexuals in 1981-1982, and intravenous drug users in 1989-1990.(ABSTRACT TRUNCATED AT 250 WORDS)
 ...
PMID:HLA-B35 is associated with accelerated progression to AIDS. 173 86

Patients with the acquired immunodeficiency syndrome are at risk to develop a variety of different cancers. Based on epidemiological data, Kaposi's sarcoma and non-Hodgkin's lymphoma have been clearly associated with infection by the human immunodeficiency virus (HIV). Additional cancers such as basal cell and squamous cell carcinomas, melanoma, and hepatocellular carcinoma have also been reported to be associated with a diagnosis of acquired immunodeficiency syndrome. A direct causal role of HIV has yet to be established for any of these cancers. We now report that transgenic mice carrying the HIV tat gene develop a high incidence of hepatocellular carcinoma after a long latency and that these changes in the liver are likely to be initiated by extrahepatic growth signals from the tat expressing cells in these mice. We predict that as acquired immunodeficiency syndrome patients begin to respond to therapy and show prolonged survival, such "secondary" malignancies induced by HIV will become increasingly prevalent.
 ...
PMID:Liver cancer in transgenic mice carrying the human immunodeficiency virus tat gene. 174 42

We describe a case of acute appendicitis precipitated by human immunodeficiency virus-related Kaposi's sarcoma of the appendix. This presentation in an otherwise asymptomatic homosexual man led to the establishment of a diagnosis of acquired immunodeficiency syndrome. Immediate follow-up revealed multicentric gastrointestinal involvement by Kaposi's sarcoma, and skin involvement ensued in 2 months. Salient features of this case and two other similar reports in the literature are highlighted.
 ...
PMID:Human immunodeficiency virus-related Kaposi's sarcoma of the appendix and acute appendicitis. Report of a case and review of the literature. 174 34


<< Previous 1 2 3 4 5 6 7 8 9 10 Next >>