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M9490557.TXT
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1994-09-24
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Document 0557
DOCN M9490557
TI Proliferating cell nuclear antigen (PCNA) expression of
megakaryocytopoiesis in normal human bone marrow and reactive lesions
with special emphasis on HIV-myelopathy.
DT 9411
AU Thiele J; Titius BR; Kvasnicka HM; Bertsch HP; Erdmann S; Fischer R;
Institute of Pathology, University of Cologne, FRG.
SO Pathol Res Pract. 1994 Jan;190(1):42-50. Unique Identifier : AIDSLINE
MED/94344844
AB A morphometric analysis was performed on bone marrow trephine biopsies
using sequential double-immunostaining, to evaluate endoreduplicative
activity of megakaryocytopoiesis. A total of 104 marrow specimens were
studied with employment of monoclonal antibodies PC10
(anti-proliferating cell nuclear antigen-PCNA) and Y2/51-CD61
(anti-platelet glycoprotein IIIa). In addition to the control group
patients included non-specific inflammatory changes, HIV-myelopathy with
normal or decreased platelet counts, idiopathic thrombocytopenic purpura
(ITP), and finally reactive thrombocytosis (TH). To exclude an undue
overexpression of PCNA, in a comparative pilot study we also applied
MIB1 (Ki-67 antigen) on normal bone marrow specimens. In accordance with
the various modalities of cell-cycle marker expression, no significantly
different findings were disclosed. PCNA-labelling index was relatively
low, ranging from 0.8 to 1.7% of the total megakaryocytopoiesis
(promegakaryoblasts to mature platelet-shedding megakaryocytes). A
significant relationship between megakaryocyte size and PCNA-expression
was determinable. This implies that some of the cases with a prevalence
of small megakaryocytes, like ITP, have the tendency to show a higher
proportion of positively-stained cells. Moreover, this feature confirms
a hypothesis postulating a decrease in the time for DNA-synthesis
(S-phase) and a relative prolongation of the G1/G2-phases of the
cell-cycle at higher ploidy levels (large-sized megakaryocytes). On the
other hand, it may be speculated that some of the hyperpolyploid giant
megakaryocytes may have reached their endstage of endoreduplication and
enter into G0-phase. In comparison with the control group and the other
entities under study, a significant reduction of PCNA-reactivity was
recognizable in HIV-myelopathy accompanied by thrombocytopenia.(ABSTRACT
TRUNCATED AT 250 WORDS)
DE Adult Bone Marrow/*PHYSIOPATHOLOGY Bone Marrow
Diseases/*PHYSIOPATHOLOGY Female *Hematopoiesis Human
Immunohistochemistry/METHODS Male *Megakaryocytes Middle Age Nuclear
Proteins/*METABOLISM Paraparesis, Tropical Spastic/*PHYSIOPATHOLOGY
Purpura, Thrombocytopenic/PHYSIOPATHOLOGY Reference Values Stains and
Staining Support, Non-U.S. Gov't Thrombocytosis/PHYSIOPATHOLOGY
JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).