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The plant hormone abscisic acid increases in human plasma after hyperglycemia and stimulates glucose consumption by adipocytes and myoblasts
Author(s) -
Bruzzone Santina,
Ameri Pietro,
Briatore Lucia,
Mannino Elena,
Basile Giovanna,
Andraghetti Gabriella,
Grozio Alessia,
Mag Mirko,
Guida Lucrezia,
Scarfì Sonia,
Salis Annalisa,
Damonte Gianluca,
Sturla Laura,
Nencioni Alessio,
Fenoglio Daniela,
Fiory Francesca,
Miele Claudia,
Beguinot Francesco,
Ruvolo Vittorio,
Bormioli Mariano,
Colombo Giuseppe,
Maggi Davide,
Murialdo Giovanni,
Cordera Renzo,
De Flora Antonio,
Zocchi Elena
Publication year - 2012
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fj.11-190140
Subject(s) - endocrinology , medicine , adipose tissue , abscisic acid , hormone , basal (medicine) , carbohydrate metabolism , insulin , glucose uptake , myocyte , biology , chemistry , biochemistry , gene
The plant hormone abscisic acid (ABA) is released from glucose‐challenged human pancreatic β cells and stimulates insulin secretion. We investigated whether plasma ABA increased during oral and intravenous glucose tolerance tests (OGTTs and IVGTTs) in healthy human subjects. In all subjects undergoing OGTTs ( n =8), plasma ABA increased over basal values (in a range from 2‐ to 9‐fold). A positive correlation was found between the ABA area under the curve (AUC) and the glucose AUC. In 4 out of 6 IVGTTs, little or no increase of ABA levels was observed. In the remaining subjects, the ABA increase was similar to that recorded during OGTTs. GLP‐1 stimulated ABA release from an insulinoma cell line and from human islets, by ~10‐ and 2‐fold in low and high glucose, respectively. Human adipose tissue also released ABA in response to high glucose. Nanomolar ABA stimulated glucose uptake, similarly to insulin, in rat L6 myoblasts and in murine 3T3‐L1 cells differentiated to adipocytes, by increasing GLUT‐4 translocation to the plasma membrane. Demonstration that a glucose load in humans is followed by a physiological rise of plasma ABA, which can enhance glucose uptake by adipose tissues and muscle cells, identifies ABA as a new mammalian hormone involved in glucose metabolism.—Bruzzone, S., Ameri, P., Briatore, L., Mannino, E., Basile, G., Andraghetti, G., Grozio, A., Magnone, M., Guida, L., Scarfì, S., Salis, A., Damonte, G., Sturla, L., Nencioni, A., Fenoglio, D., Fiory, F., Miele, C., Beguinot, F., Ruvolo, V., Bormioli, M., Colombo, G., Maggi, D., Murialdo, G., Cordera, R., De Flora, A., Zocchi, E. The plant hormone abscisic acid increases in human plasma after hyperglycemia and stimulates glucose consumption by adipocytes and myoblasts. FASEB J. 26, 1251‐1260 (2012). www.fasebj.org