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1994-10-25
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Document 3068
DOCN M94A3068
TI Variant HIV RNA distribution within lymph nodes and tonsils of stage
matched patients.
DT 9412
AU Turnicky R; Anderson D; Nau M; Zhao F; Coats J; Mayers D; Division of
Retrovirology, Walter Reed Army Institute of; Research, Rockville, MD
20850.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):160 (abstract no. PB0067). Unique
Identifier : AIDSLINE ICA10/94369507
AB OBJECTIVE: We used human lymphoid tissue as a model to better define
early HIV staging and possibly monitor response to therapies. METHODS: 5
Lymph node and 3 tonsil biopsies were obtained from stage II matched
patients, and 1 non-HIV control. Tissues were formalin fixed, and snap
frozen in liquid nitrogen. Immunoperoxidase staining was performed (CD4,
CD8, CD35 and IgD), followed by in-situ hybridization (ISH) using a full
lengh sheared HIV-1 probe. RESULTS: ISH showed intense positivity
localized to germinal centers (GC). Differences in HIV distribution were
apparent between stage matched nodes. The nodes with advanced
involutional features showed greater numbers of individual cells
expressing HIV RNA in both the GC and interfollicular area (IFA). This
is contrasted to a diffuse pattern of distribution, with less individual
cell positivity, in nodes lacking involutional changes. DISCUSSION: GCs
serve as repositories for HIV. It is apparent that there is altered
viral distribution in lymphoid tissue in early stage disease amongst
stage matched patients. Altered distribution correlated with tissue
morphology in that tissues with follicular involtion had a greater
number of individually positive cells both within the GC and IFA. These
were identified as CD4 positive cells, contrasting to very few cells
positive and a DRC related pattern in those tissues with absent
involution. Those with a DRC pattern, may have less advanced disease as
evidenced by the lack of GC involution and a more intact immune system.
Tissue biopsy serve as a method to augment patient staging in early HIV
disease and serve as a means to monitor therapy.
DE Gene Expression Regulation, Viral/PHYSIOLOGY Human HIV
Infections/CLASSIFICATION/*PATHOLOGY HIV-1/*GENETICS Immunoenzyme
Techniques Lymph Nodes/*PATHOLOGY RNA, Viral/*GENETICS
Tonsil/*PATHOLOGY MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).