Insulin modulation of pyruvate dehydrogenase in human circulating lymphocytes |
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Authors: | M Curto M Piccinini R Bruno M Mostert M T Rinaudo |
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Institution: | Dipartimento di Medicina ed Oncologia Sperimentale, Università di Torino, Italia. |
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Abstract: | 1. In human circulating lymphocytes pyruvate dehydrogenase (PDH) complex is present in the active (PDHa) and inactive (PDHi) forms. 2. PDHi conversion into PDHa is stimulated when intact lymphocytes are incubated with 5 microU/ml insulin at pH 7.4, for 15 min at 37 degrees C in a medium supplemented with 50 microM Ca2+-Mg2+. 3. The generation of a mediator is strongly suggestive since a cell free preparation from circulating lymphocytes, treated as above described, still stimulates PDHi----PDHa conversion, when combined with either disrupted or intact lymphocytes. |
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