PMID- 12894496 OWN - NLM STAT- MEDLINE DCOM- 20030828 LR - 20071115 IS - 0250-7005 (Print) IS - 0250-7005 (Linking) VI - 23 IP - 3B DP - 2003 May-Jun TI - In situ RNA-RNA hybridisation of phospholipase C beta 3 shows lack of expression in neuroendocrine tumours. PG - 2227-32 AB - BACKGROUND: Phospholipase C beta 3 (PLCB3) plays an important role in the signal transduction of the seven transmembrane receptors. The gene is located in the vicinity of the Multiple Endocrine Neoplasia type 1 (MEN1) gene on chromosome 11q13. Transfection of PLCB3 to neuroendocrine cell lines lacking expression suppresses the neoplastic phenotype and affects the gene expression of S100A3 and human mismatch repair protein, suggesting a role for PLCB3 in neuroendocrine tumorigenesis. MATERIALS AND METHODS: We used RNA-RNA in situ hybridisation for PLCB3 on a total of 82 samples including 34 from MEN1 patients. RESULTS: We show that the PLCB3 transcript is missing in 8 out of 14 MEN1-associated neoplasias as well as in 4 out of 10 bronchial carcinoids, 2 out of 10 exocrine pancreatic cancers and one sporadic adrenocortical carcinoma. CONCLUSION: Low or lack of PLCB3 expression in a subset of endocrine tumours, together with earlier published in vitro data on suppressor characteristics upon transfection, indicate that PLCB3 could be involved in the tumorigenesis in a subset of endocrine tumours. FAU - Stalberg, Peter AU - Stalberg P AD - Department of Surgical Sciences, University Hospital, S-751 85 Uppsala, Sweden. Peter.Stalberg@surgsci.uu.se FAU - Granberg, Dan AU - Granberg D FAU - Carling, Tobias AU - Carling T FAU - Wilander, Erik AU - Wilander E FAU - Eriksson, Barbro AU - Eriksson B FAU - Gobl, Anders AU - Gobl A FAU - Akerstrom, Goran AU - Akerstrom G FAU - Rastad, Jonas AU - Rastad J FAU - Modlin, Irvin M AU - Modlin IM FAU - Oberg, Kjell AU - Oberg K FAU - Skogseid, Britt AU - Skogseid B LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (Isoenzymes) RN - 0 (RNA, Neoplasm) RN - EC 3.1.4.- (Type C Phospholipases) RN - EC 3.1.4.11 (PLCB3 protein, human) RN - EC 3.1.4.11 (Phospholipase C beta) SB - IM MH - Animals MH - Gene Expression MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization MH - Isoenzymes/biosynthesis/*genetics MH - Multiple Endocrine Neoplasia Type 1/*enzymology/genetics MH - Muridae MH - Neuroendocrine Tumors/*enzymology/genetics MH - Phospholipase C beta MH - RNA, Neoplasm/*biosynthesis/genetics MH - Type C Phospholipases/biosynthesis/*genetics EDAT- 2003/08/05 05:00 MHDA- 2003/08/29 05:00 CRDT- 2003/08/05 05:00 PHST- 2003/08/05 05:00 [pubmed] PHST- 2003/08/29 05:00 [medline] PHST- 2003/08/05 05:00 [entrez] PST - ppublish SO - Anticancer Res. 2003 May-Jun;23(3B):2227-32.