Document Detail

The parathyroid/pituitary variant of multiple endocrine neoplasia type 1 usually has causes other than p27Kip1 mutations.
MedLine Citation:
PMID:  17299066     Owner:  NLM     Status:  MEDLINE    
CONTEXT: One variant of multiple endocrine neoplasia type 1 (MEN1) is defined by sporadic tumors of both the parathyroids and pituitary. The prevalence of identified MEN1 mutations in this variant is lower than in familial MEN1 (7% vs. 90%), suggesting different causes. Recently, one case of this variant had a germline mutation of p27(Kip1)/CDKN1B. OBJECTIVE: The objective was to test p27 in germline DNA from cases with tumors of both the parathyroids and pituitary. DESIGN: Medical record review and sequence analysis in DNA were performed. SETTING: This study involved an inpatient and outpatient referral program for cases of endocrine tumors. PATIENTS: Sixteen index cases had sporadic tumors of two organs, both the parathyroids and the pituitary. There were 18 additional index cases with related features of familial tumors. Five subjects were normal controls. No case had an identified MEN1 mutation. INTERVENTIONS: Clinical status of endocrine tumors was tabulated. Sequencing of germline DNA from index cases and control cases for the p27 gene was performed by PCR. MAIN OUTCOME MEASURES: Endocrine tumor types and their expressions were measured, as were sequence changes in the p27 gene. RESULTS: Tumor features were documented in index cases and families. One p27 germline single nucleotide change was identified. This predicted a silent substitution of Thr142Thr. Furthermore, there was a normal prevalence of heterozygosity for a common p27 polymorphism, making a large p27 deletion unlikely in all or most of these cases. CONCLUSIONS: The MEN1 variant with sporadic parathyroid tumors, sporadic pituitary tumor, and no identified MEN1 mutation is usually not caused by p27 germline mutations. It is usually caused by as yet unknown process(es).
Atsushi Ozawa; Sunita K Agarwal; Carmen M Mateo; A Lee Burns; Terri S Rice; Patricia A Kennedy; Caitlin M Quigley; William F Simonds; Lee S Weinstein; Settara C Chandrasekharappa; Francis S Collins; Allen M Spiegel; Stephen J Marx
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Intramural     Date:  2007-02-13
Journal Detail:
Title:  The Journal of clinical endocrinology and metabolism     Volume:  92     ISSN:  0021-972X     ISO Abbreviation:  J. Clin. Endocrinol. Metab.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-05-07     Completed Date:  2007-06-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375362     Medline TA:  J Clin Endocrinol Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1948-51     Citation Subset:  AIM; IM    
National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-1802, USA.
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MeSH Terms
Cyclin-Dependent Kinase Inhibitor p27 / genetics*
DNA, Neoplasm / genetics
Gene Frequency
Germ-Line Mutation / genetics
Hormones / metabolism
Middle Aged
Multiple Endocrine Neoplasia Type 1 / genetics*
Parathyroid Neoplasms / genetics*,  pathology
Pituitary Neoplasms / genetics*,  pathology
Polymorphism, Genetic / genetics
Reg. No./Substance:
0/DNA, Neoplasm; 0/Hormones; 147604-94-2/Cyclin-Dependent Kinase Inhibitor p27

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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