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

Epstein-Barr virus (EBV) DNA structure and gene expression were analyzed in tissue specimens from oral hairy leukoplakia (HLP), a mucocutaneous lesion that develops in patients infected with human immunodeficiency virus (HIV). The structure of the terminal restriction enzyme fragments of EBV revealed that HLP is a permissive infection without a predominant, detectable population of EBV episomal DNA. In RNA preparations from this uniquely permissive infection, EBV replicative mRNAs could be identified by Northern analysis; however, the virally encoded small nuclear RNAs, the EBERs, were not detected in most HLP RNA preparations. In situ hybridization detected EBER expression in very rare cells. These data indicate that unlike other viral small nuclear RNAs, the EBERs are not expressed during viral replication and must participate in the complex maintenance of latent EBV infection.
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PMID:Epstein-Barr virus small nuclear RNAs are not expressed in permissively infected cells in AIDS-associated leukoplakia. 217 65

Oral hairy leukoplakia (HL) was studied in 32 patients infected with the human immunodeficiency virus (HIV). Features most often found were parakeratosis of variable thickness, acanthosis, little or absent submucosal chronic inflammatory cell infiltrate, association with candidiasis in 71.8%, and intranuclear herpetic type inclusions in keratinocytes, associated with ballooned or ground-glass cytoplasm. The last feature was found in all biopsies and was most striking at the top of the stratum spinosum, just beneath the parakeratotic surface. We consider that intranuclear inclusions are the histologic hallmark of HL, which, together with other features described, make it possible to diagnose HL specifically by light microscopic examination. Ultrastructural studies were carried out in 20 cases. Viral particles of the human herpesvirus group were detected in 17 cases. Particles of papillomavirus (HPV) were not found in any of the specimens. Immunohistochemical studies were made in 26 cases using a rabbit antiserum to papillomavirus. Nuclear positivity was observed in 25 cases. Despite such apparently contradictory results, we think that a cross reaction may exist between the antiserum used against HPV and some antigens of the Epstein-Barr virus (EBV).
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PMID:Oral hairy leukoplakia: a histopathologic study of 32 cases. 217 38

The presence of Epstein-Barr virus (EBV) DNA in the epithelial cells of oral hairy leukoplakia is the confirming criterion in the diagnosis of this lesion, which occurs mainly in persons infected by the human immunodeficiency virus. Because hairy leukoplakia often presages the development of the acquired immune deficiency syndrome, it is important that suspicious lesions be accurately diagnosed. Commonly, biopsy tissue is removed for detection of EBV DNA by in situ hybridization, but biopsy is contraindicated in some patients. This study evaluated filter and cytospin in situ hybridization, two noninvasive techniques that examine epithelial cells swabbed from the surfaces of the lesions, for their sensitivity in detecting EBV DNA. As compared with tissue in situ hybridization, the filter and cytospin techniques had sensitivities of 100 and 92%, respectively. We conclude that these two noninvasive techniques can provide the clinician with an accurate alternative to biopsy whenever this human immunodeficiency virus-associated lesion is suspected.
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PMID:Diagnosis of Epstein-Barr virus infection in hairy leukoplakia by using nucleic acid hybridization and noninvasive techniques. 217 52

Nearly all patients infected with the human immunodeficiency virus (HIV) will develop cutaneous or mucous membrane manifestations. Oral cavity lesions associated with HIV disease include candidiasis, hairy leukoplakia and Kaposi's sarcoma. Skin infections such as herpes simplex, herpes zoster, molluscum contagiosum, Staphylococcus aureus folliculitis and warts are often more severe than usual and may be refractory to therapy. Seborrheic dermatitis is the most common cutaneous eruption. The appearance of Kaposi's sarcoma in a patient younger than 60 years of age or in any individual with laboratory evidence of HIV infection is diagnostic of acquired immunodeficiency syndrome. Serious drug reactions may occur, despite the depressed cellular immunity associated with HIV infection.
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PMID:Dermatologic manifestations of HIV infection. 219 Apr 55

Several signs of human immunodeficiency virus (HIV) infection, such as candidiasis, hairy leukoplakia, and Kaposi's sarcoma, may first appear in the mouth. The dentist is in a unique position to detect the oral manifestations of HIV infection. The purpose of this review article is to provide the dentist with baseline knowledge concerning the oral manifestations of HIV infection, to help the dentist identify such lesions, and to contribute to the early diagnosis and timely treatment of HIV-positive individuals.
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PMID:Oral manifestations of HIV infection, Part I. 219 9

In the course of the infection with the human immunodeficiency virus (HIV), we frequently observe disorders of the mucous membranes and, occasionally, they present the first manifestation of HIV-induced immunodeficiency. Like in other organs, opportunistic infections and malignant tumors prevail as a result of the impaired immune system. Opportunistic infections are characterized by frequency (candidiasis), aggressive expansion, persistence, frequent recurrences, and resistance to therapy (gingivitis, parodontitis, herpes simplex, warts). Oral hairy leucoplakia is considered a specific lesion of HIV infection. Malignant tumors, such as Kaposi's sarcoma, non-Hodgkin's lymphoma, and squamous cell carcinoma, may cause marked morbidity in AIDS patients; occasionally, the clinical picture of Kaposi's sarcoma and non-Hodgkin's lymphoma is rather uncharacteristic. Other manifestations on the mucous membranes may arise in association with systemic reactions, such as drug eruptions, thrombocytopenic purpura, or acute HIV infection. The etiology of still other lesions of the mucous membranes (e.g. chronic recurrent ulcers, xerostomia, disorders of pigmentation) is incompletely understood. The awareness of these disorders of the mucous membranes in HIV infection is of diagnostic, therapeutic and epidemiological importance.
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PMID:[AIDS--mucous membrane manifestations]. 220 62

The occurrence of oral mucosal lesions was studied in 70 consecutive human immunodeficiency virus (HIV)-infected patients, including 35 patients with AIDS, who had been admitted to a Department of Internal Medicine. Lesions of the oral mucosa were observed in 52 patients (74 per cent). Oral candidiasis (50 per cent), hairy leukoplakia (14 per cent), periodontal disease (13 per cent), and oral Kaposi's sarcoma (4 per cent) were the most common lesions. Oral mucosal lesions suggestive of HIV infection were present in ten of 12 patients of unknown HIV status in whom Pneumocystis carinii pneumonia was suspected. Close cooperation between the medical and dental professions is recommended since accurate intraoral examination can make a valuable contribution towards the clinical management of HIV-infected patients and may influence the CDC classification of this disease.
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PMID:Oral findings in HIV-infected patients attending a department of internal medicine: the contribution of intraoral examination towards the clinical management of HIV disease. 221 70

To study the prevalence of oral manifestations, we examined 217 patients infected with the human immunodeficiency virus (HIV). Most of our patients were intravenous drug abusers (IVDAs) (65%). Other risk categories were represented by IVDAs who were also male homosexuals or bisexuals (11%), male homosexuals and bisexuals (16%), sexual partners of HIV-infected patients (5%), and hemophilic persons and recipients of blood transfusions (3%). Forty-six patients were women and 171 were men, with a median age of 27 years (range, 11 to 65 years). At the time of first examination, 38% of patients had asymptomatic HIV infection, 36% had lymphadenopathy syndrome, 17% had AIDS-related complex, and 9% had AIDS. Oral manifestations were observed in 89 (41%) patients. Of these, 15 had asymptomatic infection, 23 had lymphadenopathy syndrome, 27 had AIDS-related complex, and 24 had AIDS. Increasing severity of disease was significantly associated with higher prevalence of oral lesions (p less than or equal to 0.0001). Candidiasis was the most common oral lesion, followed by hairy leukoplakia. Kaposi's sarcoma, melanotic macules, herpes labialis, condyloma acuminatum, perioral molluscum contagiosum, and bacterial glossitis due to Escherichia coli infection were found in a small number of patients. Results of culture for fungi, available for 203 patients, revealed that 51% of patients with positive Candida cultures had clinical evidence of candidiasis. Our study demonstrates that oral lesions are also important signs of HIV infection among IVDAs. Early diagnosis of these manifestations is becoming increasingly significant in the practice of dentistry.
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PMID:Prevalence of oral lesions among HIV-infected intravenous drug abusers and other risk groups. 230 43

Seventy patients infected with human immunodeficiency virus (HIV) have been included in this study to evaluate the impact of oral examination on the Centers for Disease Control (CDC), Atlanta, Ga, classification of HIV disease. Based on clinical data prior to oral examination, 22 patients were classified in the CDC group 2, 11 in CDC group 3, and 37 in CDC group 4. Twelve patients (55%) initially classified as CDC 2, and 4 patients (36%) initially classified as CDC 3 had to be reallocated to CDC group 4 due to the presence of oral candidiasis, hairy leukoplakia, or oral Kaposi's sarcoma. We conclude that oral examination has a large impact on the CDC classification of HIV-infected subjects. Since this classification system is used to select asymptomatic HIV-infected subjects (CDC groups 2 and 3) for clinical trials receiving antiretroviral therapy in early HIV disease, it is suggested that accurate oral examination is mandatory before inclusion of patients in such studies.
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PMID:The impact of oral examination on the Centers for Disease Control classification of subjects with human immunodeficiency virus infection. 235 58

We have investigated the features and distribution of accessory cells (ACs) and the relationship of these cells to each other and to lymphocytes in the epithelium and lamina propria of oral hairy leukoplakia (HL), with the objective of better defining the differentiation and mutual interactions of immune-response cells within HL as a preliminary step to understanding the onset and significance of this lesion during human immunodeficiency virus (HIV) infection. Twenty-four HIV-infected patients with HL, two asymptomatic HIV-positive subjects, and three HIV-negative subjects were studied by immunohistochemistry; five HIV-positive patients with HL and three asymptomatic HIV-positive subjects were studied by electron microscopy. In both the epithelium and the lamina propria of HL, we found cells with the immunohistochemical and ultrastructural features of variably differentiated ACs; differences were found between the epithelium and lamina propria. In the lamina propria, ACs were characterized by dendritic shape, multiple contacts with lymphocytes, expression of CD1a antigen, and ultrastructural features of fully differentiated ACs. Conversely, in the epithelium ACs showed bluntly dendritic shape, low expression of CD1a, absent expression of HLA-DR, constant expression of CD11c and CD14 antigens, only occasional contacts with lymphocytes, and ultrastructural features of variably, but always incompletely, differentiated cells of monocyte-dendritic lineage. Seventy-nanometer wide intracisternal particles, closely resembling A particles described in retroviral infections, were found in the intraepithelial ACs in two patients with HL. The defective differentiation of ACs in the epithelium of HL--possibly influenced by the perturbation of the epithelial microenvironment induced by Epstein-Barr virus, and following the direct HIV infection of these cells--and the exceptional finding of close contacts with lymphocytes suggest that the lesional epithelium of HL may constitute a pathway for the entry of foreign antigens which circumvent monitoring by ACs and can induce immune tolerance. The impairment of the local immune response in HL may contribute to the development of full blown, systemic immunodeficiency.
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PMID:Morphology and membrane antigens of nonlymphoid accessory cells in oral hairy leukoplakia. 239 34


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