TY - JOUR
T1 - Germline CDKN1B/p27Kip1 mutation in multiple endocrine neoplasia
AU - Georgitsi, Marianthi
AU - Raitila, Anniina
AU - Karhu, Auli
AU - van der Luijt, Rob B
AU - Aalfs, Cora M
AU - Sane, Timo
AU - Vierimaa, Outi
AU - Mäkinen, Markus J
AU - Tuppurainen, Karoliina
AU - Paschke, Ralph
AU - Gimm, Oliver
AU - Koch, Christian A
AU - Gündogdu, Sadi
AU - Lucassen, Anneke
AU - Tischkowitz, Marc
AU - Izatt, Louise
AU - Aylwin, Simon
AU - Bano, Gul
AU - Hodgson, Shirley
AU - De Menis, Ernesto
AU - Launonen, Virpi
AU - Vahteristo, Pia
AU - Aaltonen, Lauri A
PY - 2007/8
Y1 - 2007/8
N2 - CONTEXT: Germline mutations in the MEN1 gene predispose to multiple endocrine neoplasia type 1 (MEN1) syndrome, but in up to 20-25% of clinical MEN1 cases, no MEN1 mutations can be found. Recently, a germline mutation in the CDKN1B gene, encoding p27(Kip1), was reported in one suspected MEN1 family with two acromegalic patients.OBJECTIVE: Our objective was to evaluate the role of CDKN1B/p27(Kip1) in human tumor predisposition in patients clinically suspected of MEN1 but testing negative for MEN1 germline mutation as well as in familial and sporadic acromegaly/pituitary adenoma patients.DESIGN: Genomic DNA was analyzed for germline mutations in the CDKN1B/p27(Kip1) gene by PCR amplification and direct sequencing.SETTING: The study was conducted at nonprofit academic research and medical centers.PATIENTS: Thirty-six Dutch and one German suspected MEN1 patient, who previously tested negative for germline MEN1 gene mutations, were analyzed. In addition, 19 familial and 50 sporadic acromegaly/pituitary adenoma patients from Europe and the United States were included in the study.MAIN OUTCOME MEASURES: We analyzed germline CDKN1B/p27(Kip1) mutations in individuals with pituitary adenoma and MEN1-like features.RESULTS: A heterozygous 19-bp duplication (c.59_77dup19) leading to a truncated protein product was identified in one Dutch patient with suspected MEN1 phenotype, pituitary adenoma, carcinoid tumor, and hyperparathyroidism (one of 36, 2.8%). No mutations were detected in either familial or sporadic acromegaly/pituitary adenoma patients.CONCLUSIONS: Our results support the previous finding that germline CDKN1B/p27(Kip1) mutations predispose to a human MEN1-like condition. However, such mutations appear uncommon in suspected MEN1 cases and rare or nonexistent in familial or sporadic acromegaly/pituitary adenoma patients.
AB - CONTEXT: Germline mutations in the MEN1 gene predispose to multiple endocrine neoplasia type 1 (MEN1) syndrome, but in up to 20-25% of clinical MEN1 cases, no MEN1 mutations can be found. Recently, a germline mutation in the CDKN1B gene, encoding p27(Kip1), was reported in one suspected MEN1 family with two acromegalic patients.OBJECTIVE: Our objective was to evaluate the role of CDKN1B/p27(Kip1) in human tumor predisposition in patients clinically suspected of MEN1 but testing negative for MEN1 germline mutation as well as in familial and sporadic acromegaly/pituitary adenoma patients.DESIGN: Genomic DNA was analyzed for germline mutations in the CDKN1B/p27(Kip1) gene by PCR amplification and direct sequencing.SETTING: The study was conducted at nonprofit academic research and medical centers.PATIENTS: Thirty-six Dutch and one German suspected MEN1 patient, who previously tested negative for germline MEN1 gene mutations, were analyzed. In addition, 19 familial and 50 sporadic acromegaly/pituitary adenoma patients from Europe and the United States were included in the study.MAIN OUTCOME MEASURES: We analyzed germline CDKN1B/p27(Kip1) mutations in individuals with pituitary adenoma and MEN1-like features.RESULTS: A heterozygous 19-bp duplication (c.59_77dup19) leading to a truncated protein product was identified in one Dutch patient with suspected MEN1 phenotype, pituitary adenoma, carcinoid tumor, and hyperparathyroidism (one of 36, 2.8%). No mutations were detected in either familial or sporadic acromegaly/pituitary adenoma patients.CONCLUSIONS: Our results support the previous finding that germline CDKN1B/p27(Kip1) mutations predispose to a human MEN1-like condition. However, such mutations appear uncommon in suspected MEN1 cases and rare or nonexistent in familial or sporadic acromegaly/pituitary adenoma patients.
KW - Amino Acid Sequence
KW - Computer Simulation
KW - Cyclin-Dependent Kinase Inhibitor p27
KW - DNA/genetics
KW - DNA Mutational Analysis
KW - Germ-Line Mutation
KW - Humans
KW - Immunohistochemistry
KW - Intracellular Signaling Peptides and Proteins/genetics
KW - Molecular Sequence Data
KW - Multiple Endocrine Neoplasia Type 1/genetics
KW - Reverse Transcriptase Polymerase Chain Reaction
U2 - 10.1210/jc.2006-2843
DO - 10.1210/jc.2006-2843
M3 - Article
C2 - 17519308
SN - 0021-972X
VL - 92
SP - 3321
EP - 3325
JO - Journal of Clinical Endocrinology and Metabolism
JF - Journal of Clinical Endocrinology and Metabolism
IS - 8
ER -