Document Detail

Expression of parathyroid hormone-related protein (PTHrP) in parathyroid tissue under normal and pathological conditions.
MedLine Citation:
PMID:  11813867     Owner:  NLM     Status:  MEDLINE    
Parathyroid hormone-related protein (PTHrP), a factor responsible for malignancy associated hypercalcemia, plays a physiological roles such as bone development and placental calcium transport. The expression of PTHrP in adult human parathyroid tissues under normal and pathological conditions was analyzed. By immunohistochemistry, PTHrP expression was detected in 86% of normal parathyroid (12/14 cases), 74% of adenomas (14/19) and 89% of hyperplasia secondary to chronic renal failure (16/18). PTHrP protein was observed mainly in the cytoplasm of oxyphil cells, consistent with the localization of its mRNA demonstrated by in situ hybridization. The rate of PTHrP-positive cells was higher in areas consisting of oxyphil cells than in those of non-oxyphil cells, regardless of whether the parathyroid was normal or pathological. In the normal parathyroid, an age-related increase in PTHrP expression was observed with a relative increase in oxyphil cells, reflecting aging and deterioration of parathyroid tissue. In adenoma, cases with a predominance of oxyphil cells expressed PTHrP, whereas clear cell adenoma did not. In secondary hyperplasia, the rate of PTHrP-expressing cells was higher than in normal parathyroid or adenoma, with varying levels of expression among nodules. We speculate that PTHrP could act through the paracrine/autocrine mechanism to regulate proliferation and differentiation of normal and neoplastic parathyroid cells.
R Kitazawa; S Kitazawa; S Maeda; A Kobayashi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Histology and histopathology     Volume:  17     ISSN:  0213-3911     ISO Abbreviation:  Histol. Histopathol.     Publication Date:  2002 Jan 
Date Detail:
Created Date:  2002-01-29     Completed Date:  2002-07-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8609357     Medline TA:  Histol Histopathol     Country:  Spain    
Other Details:
Languages:  eng     Pagination:  179-84     Citation Subset:  IM    
Department of Biomedical Informatics, Kobe University Graduate School of Medicine, Japan.
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MeSH Terms
Adenoma / metabolism*,  pathology*
Blotting, Northern
In Situ Hybridization
Kidney Failure, Chronic / pathology
Paraffin Embedding
Parathyroid Glands / metabolism*,  pathology*
Parathyroid Hormone-Related Protein
Parathyroid Neoplasms / metabolism*,  pathology*
Protein Biosynthesis*
Proteins / genetics*
Reverse Transcriptase Polymerase Chain Reaction
Tissue Fixation
Reg. No./Substance:
0/PTHLH protein, human; 0/Parathyroid Hormone-Related Protein; 0/Proteins

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