Presence and expression of a novel variant form of ST2 gene product in human leukemic cell line UT-7/GM. |
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Authors: | S i Tominaga K Kuroiwa K Tago H Iwahana K Yanagisawa N Komatsu |
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Affiliation: | Department of Medicine, Jichi Medical School, Kawachi-gun, Tochigi-ken, Japan. shintomi@jichi.ac.jp |
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Abstract: | A novel variant cDNA from the human ST2 gene other than ST2 or ST2L was identified and tentatively named ST2V. Alternative splicing inserts a new exon which leads to a change in the C-terminal portion of ST2, causing it to gain a hydrophobic tail instead of losing the third immunoglobulin-like domain. ST2V is expressed in human leukemic cell line UT-7 and its sublines UT-7/GM, UT-7/EPO, and UT-7/TPO, in addition to human helper T cell line 5C10. The amount of ST2V mRNA is greatly diminished when UT-7/GM cells are induced to differentiate into either erythroblastic or megakaryoblastic phenotypes. The possible roles of the ST2V in growth and differentiation are intriguing. |
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