title: Participation of phosphatidyl inositol 3-kinase/protein kinase B and ERK1/2 pathways in interleukin-1beta stimulation of lactate production in Sertoli cells.
abstract: Interleukin-1beta (IL1beta ) belongs to a set of intratesticular regulators that provide the fine-tuning of cellular processes implicated in the maintenance of spermatogenesis. The aim of the present study was to analyze the signaling pathways that may participate in IL1beta regulation of Sertoli cell function. Sertoli cell cultures from 20-day-old rat were used. Stimulation of the cultures with IL1beta showed increments in phosphorylated protein kinase B (PKB), P70S6K, and ERK1/2 levels. A phosphatidyl inositol 3-kinase (PI3K) inhibitor (wortmannin (W)), a mammalian target of rapamycin inhibitor (rapamycin (R)), and a MEK inhibitor (PD98059 (PD)) were utilized to evaluate the participation of PI3K/PKB, P70S6K, and ERK1/2 pathways in the regulation of lactate production by IL1beta . PD and W, but not R, decreased IL1beta-stimulated lactate production. The participation of these pathways in the regulation of glucose uptake and lactate dehydrogenase (LDH) A mRNA levels by IL1beta was also analyzed. It was observed that W decreased IL1beta-stimulated glucose uptake, whereas PD and R did not modify it. On the other hand, PD decreased the stimulation of LDH A mRNA levels by IL1beta , whereas W and R did not modify it. In summary, results presented herein demonstrate that IL1beta stimulates PI3K/PKB-, P70S6K-, and ERK1/2-dependent pathways in rat Sertoli cells. Moreover, these results show that while IL1beta utilizes the PI3K/PKB pathway to regulate glucose transport, it utilizes the ERK1/2 pathway to regulate LDH A mRNA levels. This study reveals that IL1beta utilizes different signal transduction pathways to modify the biochemical steps that are important to regulate lactate production in rat Sertoli cells.
authors.affiliation: Centro de Investigaciones Endocrinológicas (CEDIE), Hospital de Niños Ricardo Gutiérrez, Gallo 1330, C1425EFD Buenos Aires, Argentina.
authors.forename: María Fernanda
authors.initials: MF
authors.lastname: Riera
authors.forename: María Noel
authors.initials: MN
authors.lastname: Galardo
authors.forename: Eliana Herminia
authors.initials: EH
authors.lastname: Pellizzari
authors.forename: Silvina Beatriz
authors.initials: SB
authors.lastname: Meroni
authors.forename: Selva Beatriz
authors.initials: SB
authors.lastname: Cigorraga
mesh_terms: D000730:Androstadienes / Q000494:pharmacology; D000818:Animals; D015153:Blotting, Western / Q000379:methods; D002070:Butadienes / Q000494:pharmacology; D002478:Cells, Cultured; D002867:Chromones / Q000494:pharmacology; D004789:Enzyme Activation; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005419:Flavonoids / Q000494:pharmacology; D007166:Immunosuppressive Agents / Q000494:pharmacology; D053583:Interleukin-1beta / Q000494:pharmacology*; D007770:L-Lactate Dehydrogenase / Q000032:analysis / Q000378:metabolism; D007773:Lactates / Q000378:metabolism*; D008297:Male; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*; D009025:Morpholines / Q000494:pharmacology; D009570:Nitriles / Q000494:pharmacology; D019869:Phosphatidylinositol 3-Kinases / Q000378:metabolism*; D000081082:Phosphoinositide-3 Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012708:Sertoli Cells / Q000187:drug effects / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects; D020123:Sirolimus / Q000494:pharmacology; D013268:Stimulation, Chemical; D014168:Transferrin / Q000032:analysis / Q000378:metabolism; D000077191:Wortmannin
chemical_list: D000730:Androstadienes; D002070:Butadienes; D002867:Chromones; D004791:Enzyme Inhibitors; D005419:Flavonoids; D007166:Immunosuppressive Agents; D053583:Interleukin-1beta; D007770:L-Lactate Dehydrogenase; D007773:Lactates; D020928:Mitogen-Activated Protein Kinases; D009025:Morpholines; D009570:Nitriles; D019869:Phosphatidylinositol 3-Kinases; D000081082:Phosphoinositide-3 Kinase Inhibitors; D051057:Proto-Oncogene Proteins c-akt; D020123:Sirolimus; D014168:Transferrin; D000077191:Wortmannin; C113580:U 0126; C085911:2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one; C093973:2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one