Antiangiogenic and antiproliferative effects of substituted-1,3,4- oxadiazole derivatives is mediated by down regulation of VEGF and inhibition of translocation of HIF-1α in Ehrlich ascites tumor cells

Akhilesh Kumar, Saritha S. D'Souza, Sachin Raj Mysore Nagaraj, S. L. Gaonkar, Bharathi P. Salimath, K. M.Lokanatha Rai

Research output: Contribution to journalArticle

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Abstract

Purpose: 1,3,4-Oxadiazoles are an important class of heterocyclic compounds, which play a pivotal role in various pharmaceutical applications. Here, we investigated the antiangiogenic and antiproliferative effects of the derivatives and explored its mechanism of action on EAT cells. Methods: The cytotoxic effect of the derivatives on EAT and HEK293 cells was assessed by MTT assay. Effect of the derivatives on ALP activity and proliferation was measured. Swiss albino mice transplanted with EAT cells were used as a model system to study the effect of the derivatives in vivo. Inhibition of angiogenesis in mice peritoneum, CAM and Cornea of the rat were studied. Finally, the effects on VEGF gene expression, HIF-1α translocation and cell cycle arrest were determined. Results: The IC50 range for growth inhibition of EAT cells was found to be 140-175 μM. In contrast normal HEK293 cells were resistant to the derivatives at this range. Treatment with derivatives in vivo was demonstrated by the down regulation of VEGF in EAT cells and inhibition of blood vessels formation in mice peritoneum, CAM and cornea of rat, indicating the potent angioinhibitory effect of the derivatives. VEGF promoter-luciferase reporter gene expression analysis showed suppression of VEGF gene expression in vitro. The derivatives proved to be potent antiproliferative agents as shown by FACS analysis and decreased ALP activity. Furthermore, expression of HIF-1α was also down regulated by derivatives by repressing its nuclear translocation. Conclusions: Oxadiazole derivatives are strong bioactive compounds with antiangiogenic and antiproliferative potential both in vitro and in vivo. We postulate that diminished HIF-1α nuclear presence in oxadiazole treated EAT cells could be responsible for decreased VEGF expression and antiangiogenic effects.

Original languageEnglish
Pages (from-to)1221-1233
Number of pages13
JournalCancer Chemotherapy and Pharmacology
Volume64
Issue number6
DOIs
Publication statusPublished - 11-2009

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Ehrlich Tumor Carcinoma
Vascular Endothelial Growth Factor A
Tumors
Down-Regulation
Cells
Derivatives
Oxadiazoles
HEK293 Cells
Peritoneum
Gene Expression
Cornea
Gene expression
Heterocyclic Compounds
Computer aided manufacturing
Cell Cycle Checkpoints
Luciferases
Reporter Genes
Inhibitory Concentration 50
Blood Vessels
Rats

All Science Journal Classification (ASJC) codes

  • Oncology
  • Toxicology
  • Pharmacology
  • Cancer Research
  • Pharmacology (medical)

Cite this

@article{09fe3df846024989bbf6329669df2bb2,
title = "Antiangiogenic and antiproliferative effects of substituted-1,3,4- oxadiazole derivatives is mediated by down regulation of VEGF and inhibition of translocation of HIF-1α in Ehrlich ascites tumor cells",
abstract = "Purpose: 1,3,4-Oxadiazoles are an important class of heterocyclic compounds, which play a pivotal role in various pharmaceutical applications. Here, we investigated the antiangiogenic and antiproliferative effects of the derivatives and explored its mechanism of action on EAT cells. Methods: The cytotoxic effect of the derivatives on EAT and HEK293 cells was assessed by MTT assay. Effect of the derivatives on ALP activity and proliferation was measured. Swiss albino mice transplanted with EAT cells were used as a model system to study the effect of the derivatives in vivo. Inhibition of angiogenesis in mice peritoneum, CAM and Cornea of the rat were studied. Finally, the effects on VEGF gene expression, HIF-1α translocation and cell cycle arrest were determined. Results: The IC50 range for growth inhibition of EAT cells was found to be 140-175 μM. In contrast normal HEK293 cells were resistant to the derivatives at this range. Treatment with derivatives in vivo was demonstrated by the down regulation of VEGF in EAT cells and inhibition of blood vessels formation in mice peritoneum, CAM and cornea of rat, indicating the potent angioinhibitory effect of the derivatives. VEGF promoter-luciferase reporter gene expression analysis showed suppression of VEGF gene expression in vitro. The derivatives proved to be potent antiproliferative agents as shown by FACS analysis and decreased ALP activity. Furthermore, expression of HIF-1α was also down regulated by derivatives by repressing its nuclear translocation. Conclusions: Oxadiazole derivatives are strong bioactive compounds with antiangiogenic and antiproliferative potential both in vitro and in vivo. We postulate that diminished HIF-1α nuclear presence in oxadiazole treated EAT cells could be responsible for decreased VEGF expression and antiangiogenic effects.",
author = "Akhilesh Kumar and D'Souza, {Saritha S.} and {Mysore Nagaraj}, {Sachin Raj} and Gaonkar, {S. L.} and Salimath, {Bharathi P.} and Rai, {K. M.Lokanatha}",
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Antiangiogenic and antiproliferative effects of substituted-1,3,4- oxadiazole derivatives is mediated by down regulation of VEGF and inhibition of translocation of HIF-1α in Ehrlich ascites tumor cells. / Kumar, Akhilesh; D'Souza, Saritha S.; Mysore Nagaraj, Sachin Raj; Gaonkar, S. L.; Salimath, Bharathi P.; Rai, K. M.Lokanatha.

In: Cancer Chemotherapy and Pharmacology, Vol. 64, No. 6, 11.2009, p. 1221-1233.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Antiangiogenic and antiproliferative effects of substituted-1,3,4- oxadiazole derivatives is mediated by down regulation of VEGF and inhibition of translocation of HIF-1α in Ehrlich ascites tumor cells

AU - Kumar, Akhilesh

AU - D'Souza, Saritha S.

AU - Mysore Nagaraj, Sachin Raj

AU - Gaonkar, S. L.

AU - Salimath, Bharathi P.

AU - Rai, K. M.Lokanatha

PY - 2009/11

Y1 - 2009/11

N2 - Purpose: 1,3,4-Oxadiazoles are an important class of heterocyclic compounds, which play a pivotal role in various pharmaceutical applications. Here, we investigated the antiangiogenic and antiproliferative effects of the derivatives and explored its mechanism of action on EAT cells. Methods: The cytotoxic effect of the derivatives on EAT and HEK293 cells was assessed by MTT assay. Effect of the derivatives on ALP activity and proliferation was measured. Swiss albino mice transplanted with EAT cells were used as a model system to study the effect of the derivatives in vivo. Inhibition of angiogenesis in mice peritoneum, CAM and Cornea of the rat were studied. Finally, the effects on VEGF gene expression, HIF-1α translocation and cell cycle arrest were determined. Results: The IC50 range for growth inhibition of EAT cells was found to be 140-175 μM. In contrast normal HEK293 cells were resistant to the derivatives at this range. Treatment with derivatives in vivo was demonstrated by the down regulation of VEGF in EAT cells and inhibition of blood vessels formation in mice peritoneum, CAM and cornea of rat, indicating the potent angioinhibitory effect of the derivatives. VEGF promoter-luciferase reporter gene expression analysis showed suppression of VEGF gene expression in vitro. The derivatives proved to be potent antiproliferative agents as shown by FACS analysis and decreased ALP activity. Furthermore, expression of HIF-1α was also down regulated by derivatives by repressing its nuclear translocation. Conclusions: Oxadiazole derivatives are strong bioactive compounds with antiangiogenic and antiproliferative potential both in vitro and in vivo. We postulate that diminished HIF-1α nuclear presence in oxadiazole treated EAT cells could be responsible for decreased VEGF expression and antiangiogenic effects.

AB - Purpose: 1,3,4-Oxadiazoles are an important class of heterocyclic compounds, which play a pivotal role in various pharmaceutical applications. Here, we investigated the antiangiogenic and antiproliferative effects of the derivatives and explored its mechanism of action on EAT cells. Methods: The cytotoxic effect of the derivatives on EAT and HEK293 cells was assessed by MTT assay. Effect of the derivatives on ALP activity and proliferation was measured. Swiss albino mice transplanted with EAT cells were used as a model system to study the effect of the derivatives in vivo. Inhibition of angiogenesis in mice peritoneum, CAM and Cornea of the rat were studied. Finally, the effects on VEGF gene expression, HIF-1α translocation and cell cycle arrest were determined. Results: The IC50 range for growth inhibition of EAT cells was found to be 140-175 μM. In contrast normal HEK293 cells were resistant to the derivatives at this range. Treatment with derivatives in vivo was demonstrated by the down regulation of VEGF in EAT cells and inhibition of blood vessels formation in mice peritoneum, CAM and cornea of rat, indicating the potent angioinhibitory effect of the derivatives. VEGF promoter-luciferase reporter gene expression analysis showed suppression of VEGF gene expression in vitro. The derivatives proved to be potent antiproliferative agents as shown by FACS analysis and decreased ALP activity. Furthermore, expression of HIF-1α was also down regulated by derivatives by repressing its nuclear translocation. Conclusions: Oxadiazole derivatives are strong bioactive compounds with antiangiogenic and antiproliferative potential both in vitro and in vivo. We postulate that diminished HIF-1α nuclear presence in oxadiazole treated EAT cells could be responsible for decreased VEGF expression and antiangiogenic effects.

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