Title : Nickel compounds act through phosphatidylinositol-3-kinase/Akt-dependent, p70(S6k)-independent pathway to induce hypoxia inducible factor transactivation and Cap43 expression in mouse epidermal Cl41 cells.

Pub. Date : 2004 Jan 1

PMID : 14729612






10 Functional Relationships(s)
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1 Nickel compounds act through phosphatidylinositol-3-kinase/Akt-dependent, p70(S6k)-independent pathway to induce hypoxia inducible factor transactivation and Cap43 expression in mouse epidermal Cl41 cells. Nickel thymoma viral proto-oncogene 1 Mus musculus
2 Inhibition of PI-3K, Akt, and p70(S6k) by overexpression of a dominant-negative mutant of PI-3K (Deltap85) impaired nickel-induced HIF-1 transactivation. Nickel thymoma viral proto-oncogene 1 Mus musculus
3 Furthermore, an overexpression of the dominant-negative Akt mutant (Akt-T308A/S473A) blocked nickel-induced Akt phosphorylation and HIF-1 transactivation, whereas inhibition of p70(S6k) activation by pretreatment of cells with rapamycin did not show significant inhibitory effects on HIF-1 transactivation induced by nickel compounds. Nickel thymoma viral proto-oncogene 1 Mus musculus
4 Furthermore, an overexpression of the dominant-negative Akt mutant (Akt-T308A/S473A) blocked nickel-induced Akt phosphorylation and HIF-1 transactivation, whereas inhibition of p70(S6k) activation by pretreatment of cells with rapamycin did not show significant inhibitory effects on HIF-1 transactivation induced by nickel compounds. Nickel thymoma viral proto-oncogene 1 Mus musculus
5 Furthermore, an overexpression of the dominant-negative Akt mutant (Akt-T308A/S473A) blocked nickel-induced Akt phosphorylation and HIF-1 transactivation, whereas inhibition of p70(S6k) activation by pretreatment of cells with rapamycin did not show significant inhibitory effects on HIF-1 transactivation induced by nickel compounds. Nickel thymoma viral proto-oncogene 1 Mus musculus
6 Furthermore, an overexpression of the dominant-negative Akt mutant (Akt-T308A/S473A) blocked nickel-induced Akt phosphorylation and HIF-1 transactivation, whereas inhibition of p70(S6k) activation by pretreatment of cells with rapamycin did not show significant inhibitory effects on HIF-1 transactivation induced by nickel compounds. Nickel thymoma viral proto-oncogene 1 Mus musculus
7 Furthermore, an overexpression of the dominant-negative Akt mutant (Akt-T308A/S473A) blocked nickel-induced Akt phosphorylation and HIF-1 transactivation, whereas inhibition of p70(S6k) activation by pretreatment of cells with rapamycin did not show significant inhibitory effects on HIF-1 transactivation induced by nickel compounds. Nickel thymoma viral proto-oncogene 1 Mus musculus
8 Furthermore, an overexpression of the dominant-negative Akt mutant (Akt-T308A/S473A) blocked nickel-induced Akt phosphorylation and HIF-1 transactivation, whereas inhibition of p70(S6k) activation by pretreatment of cells with rapamycin did not show significant inhibitory effects on HIF-1 transactivation induced by nickel compounds. Nickel thymoma viral proto-oncogene 1 Mus musculus
9 Consistent with HIF-1 transactivation, inhibition of the PI-3K/Akt pathway by either overexpression of Deltap85 or Akt-T308A/S473A caused dramatic inhibition of Cap43 protein expression induced by nickel compounds, whereas pretreatment of cells with rapamycin did not exhibit inhibition of Cap43 induction. Nickel thymoma viral proto-oncogene 1 Mus musculus
10 These results demonstrated that nickel compounds induce HIF-1 transactivation and Cap43 protein expression through a PI-3K/Akt-dependent and p70(S6k)-independent pathway. Nickel thymoma viral proto-oncogene 1 Mus musculus