Leuk Res 2009,
PMID: 18640717
García, Mariana G; Alaniz, Laura D; Cordo Russo, Rosalía I; Alvarez, Elida; Hajos, Silvia E
Upregulation of the phosphatidylinositol 3-kinase (PI3K)/Akt pathway has been described in some tumors related to multidrug resistance (MDR). The aim of this work was to analyze the relationship between PI3K/Akt, MDR and NF-kappaB in murine lymphoma cell lines resistant to vincristine (LBR-V160) and doxorubicin (LBR-D160) as well as in the sensitive line (LBR-). PI3K/Akt activity, analyzed by phosphatidylinositol trisphosphate production and phosphorylated Akt (p-Akt) expression, was higher in the resistant cell lines than in the sensitive one and inhibition with wortmannin or LY294002 improved apoptosis in the resistant cell lines. Vincristine but not doxorubicin increased p-Akt expression whereas co-treatment with PI3K inhibitors and vincristine increased apoptosis in the three cell lines. Wortmannin and LY294002 inhibited P-glycoprotein (Pgp) function and also increased NF-kappaB activity. We concluded that the PI3K/Akt pathway is involved in MDR in lymphoma cell lines and PI3K/Akt inhibition correlates down-regulation of NF-kappaB activity and inhibition Pgp function.
Diseases/Pathways annotated by Medline MESH: Lymphoma
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Text Mining Data
NF-kappaB ⊣ PI3K/Akt: "
PI3K/Akt inhibition modulates multidrug resistance and
activates NF-kappaB in murine lymphoma cell lines
"
NF-kappaB ⊣ PI3K/Akt: "
PI3K/Akt inhibition modulates multidrug resistance and activates NF-kappaB in murine lymphoma cell lines
"
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