Gastrointestinal expression and partial cDNA cloning of murine Muc2.

Gastrointestinal expression and partial cDNA cloning of murine Muc2. Research Abstract Details 

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Gastrointestinal expression and partial cDNA cloning of murine Muc2. Abstract Text:

B J van Klinken,A W Einerhand,L A Duits,M K Makkink,K M Tytgat,I B Renes,M Verburg,H A ,J Dekker,

To help us investigate the role of mucin in the protection of the colonic epithelium in the mouse, we aimed to identify the murine colonic mucin (MCM) and its encoding gene. We isolated MCM, raised an anti-MCM antiserum, and studied the biosynthesis of MCM in the gastrointestinal tract. Isolated MCM resembled other mucins in physicochemical properties. Anti-MCM recognized MCM as well as rat and human MUC2 on Western blots, interacting primarily with peptide epitopes, indicating that MCM was identical to murine Muc2. Using anti-MCM and previously characterized anti-human and anti-rat MUC2 antibodies, we identified a murine Muc2 precursor in the colon of approximately 600 kDa, which appeared similar in size to rat and human MUC2 precursors. Western blotting, immunoprecipitation of metabolically labeled mucins, and immunohistochemistry showed that murine Muc2 was expressed in the colon and the small intestine but was absent in the stomach. To independently identify murine Muc2, we cloned a cDNA fragment from murine colonic mRNA, encoding the 302 NH2-terminal amino acids of murine Muc2. The NH2 terminus of murine Muc2 showed 86 and 75% identity to the corresponding rat and human MUC2 peptide sequences, respectively. Northern blotting with a murine Muc2 cDNA probe showed hybridization to a very large mRNA, which was expressed highly in the colon and to some extend in the small intestine but was absent in the stomach. In situ hybridization showed that the murine Muc2 mRNA was confined to intestinal goblet cells. In conclusion, by two independent sets of experiments we identified murine Muc2, which appears homologous to rat and human MUC2. Because Muc2 is prominently expressed in the colon, it is most likely to be the predominant mucin in the colonic mucus layer.

Gastrointestinal expression and partial cDNA cloning of murine Muc2. Publishing Authors By Initials

BJ van Klinken,AW Einerhand,LA Duits,MK Makkink,KM Tytgat,IB Renes,M Verburg,HA ,J Dekker,

For similar animals: chordata: vertebrates: mammals: rodentia: muridae: murinae: rats research abstracts see: animals: chordata: vertebrates: mammals: rodentia: muridae: murinae: rats research

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Gastrointestinal expression and partial cDNA cloning of murine Muc2. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: The American journal of physiology

VOLUME: 276

Page Numbers: G115-24

Journal Abbreviation: Am. J. Physiol.

ISSN: 0002-9513

DAY: 30

MONTH: Jan

YEAR: 1999

Gastrointestinal expression and partial cDNA cloning of murine Muc2. Information

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LANGUAGE: eng

NlmUniqueID: 370511

Gastrointestinal expression and partial cDNA cloning of murine Muc2. Keywords Mesh Terms:

KEYWORDS: Rats

MESH TERMS: metabolism

Chemical & Substance for Abstract: Gastrointestinal expression and partial cDNA cloning of murine Muc2. Information

Substance Name: RNA, Messenger

Registry Number: 0

Grant and Affiliation Information for Gastrointestinal expression and partial cDNA cloning of murine Muc2.

AFFILIATION: Emma Children's Hospital, Academic Medical Center, 1105 AZ Amsterdam, The Netherlands.

Country: UNITED STATES

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MEDLINETA: Am J Physiol

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