PMID- 11274402 OWN - NLM STAT- MEDLINE DCOM- 20010503 LR - 20240407 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 98 IP - 7 DP - 2001 Mar 27 TI - Inactivation of menin, a Smad3-interacting protein, blocks transforming growth factor type beta signaling. PG - 3837-42 AB - Multiple endocrine neoplasia type 1 (MEN1) is an autosomal dominant disorder characterized by endocrine tumors of parathyroids, pancreatic islets, and anterior pituitary. The MEN1 gene encodes a nuclear protein called menin. In MEN1 carriers inactivating mutations give rise to a truncated product consistent with menin acting as a tumor suppressor gene. However, the role of menin in tumorigenesis and its physiological functions are not known. Here, we show that menin inactivation by antisense RNA antagonizes transforming growth factor type beta-mediated cell growth inhibition. Menin interacts with Smad3, and antisense menin suppresses transforming growth factor type beta-induced and Smad3-induced transcriptional activity by inhibiting Smad3/4-DNA binding at specific transcriptional regulatory sites. These results implicate a mechanism of tumorigenesis by menin inactivation. FAU - Kaji, H AU - Kaji H AD - Calcium Research Laboratory, Royal Victoria Hospital, McGill University, Montreal, QC, Canada H3A 1A1. FAU - Canaff, L AU - Canaff L FAU - Lebrun, J J AU - Lebrun JJ FAU - Goltzman, D AU - Goltzman D FAU - Hendy, G N AU - Hendy GN LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20010313 PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (DNA, Complementary) RN - 0 (DNA-Binding Proteins) RN - 0 (MEN1 protein, human) RN - 0 (Neoplasm Proteins) RN - 0 (Proto-Oncogene Proteins) RN - 0 (RNA, Antisense) RN - 0 (SMAD3 protein, human) RN - 0 (Smad3 Protein) RN - 0 (Smad3 protein, rat) RN - 0 (Trans-Activators) RN - 0 (Transforming Growth Factor beta) RN - 9007-49-2 (DNA) SB - IM MH - Active Transport, Cell Nucleus/drug effects MH - Animals MH - CHO Cells MH - COS Cells MH - Cell Division/drug effects MH - Cricetinae MH - DNA/drug effects/metabolism MH - DNA, Complementary/biosynthesis MH - DNA-Binding Proteins/*metabolism/physiology MH - Humans MH - Neoplasm Proteins/*antagonists & inhibitors/genetics/metabolism MH - Pituitary Gland, Anterior/cytology/physiology MH - *Proto-Oncogene Proteins MH - RNA, Antisense/*pharmacology MH - Rats MH - Signal Transduction MH - Smad3 Protein MH - Trans-Activators/*metabolism/physiology MH - Transcriptional Activation/drug effects MH - Transforming Growth Factor beta/*physiology MH - Tumor Cells, Cultured PMC - PMC31139 EDAT- 2001/03/29 10:00 MHDA- 2001/05/05 10:01 PMCR- 2001/09/27 CRDT- 2001/03/29 10:00 PHST- 2001/03/29 10:00 [pubmed] PHST- 2001/05/05 10:01 [medline] PHST- 2001/03/29 10:00 [entrez] PHST- 2001/09/27 00:00 [pmc-release] AID - 061358098 [pii] AID - 3580 [pii] AID - 10.1073/pnas.061358098 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 2001 Mar 27;98(7):3837-42. doi: 10.1073/pnas.061358098. Epub 2001 Mar 13.