Literature DB >> 14691960

Stimulation of midgut stem cell proliferation by Manduca sexta alpha-arylphorin.

Michael B Blackburn1, Marcia J Loeb, Edward Clark, Howard Jaffe.   

Abstract

Extracts of the green-colored perivisceral fat body of newly ecdysed Manduca sexta pupae stimulate mitosis in midgut stem cells of Heliothis virescens cultured in vitro. Using a combination of cation- and anion-exchange chromatography, we have isolated a protein from these fat body extracts that accounts for the observed stem cell proliferation. SDS-PAGE analysis of the protein results in a single band of 77 kDa. Sequences of tryptic peptides from this protein are identical to internal sequences of the storage hexamer alpha-arylphorin. The alpha-arylphorin isolated by our procedure represents a small fraction of the total arylphorin present in the fat body extract. However, it alone seems responsible for the stimulation of mitotic activity in H. virescens midgut stem cells.

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Year:  2004        PMID： 14691960     DOI： 10.1002/arch.10119

Source DB:  PubMed          Journal:  Arch Insect Biochem Physiol        ISSN： 0739-4462            Impact factor:   1.698


  12 in total

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