TY - JOUR
T1 - Neutrophil Gelatinase-associated Lipocalin Acts as a Protective Factor against H2O2 Toxicity
AU - Roudkenar, Mehryar Habibi
AU - Halabian, Raheleh
AU - Ghasemipour, Zahra
AU - Roushandeh, Amaneh Mohammadi
AU - Rouhbakhsh, Mahdi
AU - Nekogoftar, Mahin
AU - Kuwahara, Yoshikazu
AU - Fukumoto, Manabu
AU - Shokrgozar, Mohammad Ali
PY - 2008/8
Y1 - 2008/8
N2 - Background: Lipocalin 2 (Lcn2, NGAL) is a member of the lipocalin superfamily for which a variety of functions have been reported. However, the precise biological roles of NGAL are not fully known. We have investigated the ability of NGAL to prevent H2O2 toxicity, which is considered to be the classical inducer of oxidative stress caused by ROS generation in an in vitro model. Methods: NGAL cDNA was isolated from HepG2 cell line and cloned to pcDNA3.1(+) vector. The construct was transfected to CHO cell line. Stable clones were generated, and the expression of NGAL was determined by RT-PCR, Western blot analysis and ELISA. NGAL gene in A549 cell line was downregulated with the siRNA. CHO and A549 cells were intoxicated with H2O2 and cell proliferation was performed by MTT assay. Apoptotic cells were detected by flow cytometry. Results: Cell proliferation was higher in CHO expressing NGAL in doses of 5 and 10 mM H2O2 after 2 h compared with the control. H2O2 was also more toxic in the presence of NGAL siRNA compared with the control in A549 cell. Our results also revealed that NGAL protect cells from apoptosis. Conclusions: Overall, our results revealed for the first time a new function for NGAL/Lcn2: acting as a protective factor against H2O2 toxicity. In the future, NGAL may have the potential application to ameliorate the toxicity induced by oxidative stress conditions.
AB - Background: Lipocalin 2 (Lcn2, NGAL) is a member of the lipocalin superfamily for which a variety of functions have been reported. However, the precise biological roles of NGAL are not fully known. We have investigated the ability of NGAL to prevent H2O2 toxicity, which is considered to be the classical inducer of oxidative stress caused by ROS generation in an in vitro model. Methods: NGAL cDNA was isolated from HepG2 cell line and cloned to pcDNA3.1(+) vector. The construct was transfected to CHO cell line. Stable clones were generated, and the expression of NGAL was determined by RT-PCR, Western blot analysis and ELISA. NGAL gene in A549 cell line was downregulated with the siRNA. CHO and A549 cells were intoxicated with H2O2 and cell proliferation was performed by MTT assay. Apoptotic cells were detected by flow cytometry. Results: Cell proliferation was higher in CHO expressing NGAL in doses of 5 and 10 mM H2O2 after 2 h compared with the control. H2O2 was also more toxic in the presence of NGAL siRNA compared with the control in A549 cell. Our results also revealed that NGAL protect cells from apoptosis. Conclusions: Overall, our results revealed for the first time a new function for NGAL/Lcn2: acting as a protective factor against H2O2 toxicity. In the future, NGAL may have the potential application to ameliorate the toxicity induced by oxidative stress conditions.
KW - HO
KW - NGAL/Lcn2
KW - Protective factor
KW - Toxicity
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U2 - 10.1016/j.arcmed.2008.05.003
DO - 10.1016/j.arcmed.2008.05.003
M3 - Article
C2 - 18662586
AN - SCOPUS:47749125349
VL - 39
SP - 560
EP - 566
JO - Archives of Medical Research
JF - Archives of Medical Research
SN - 0188-4409
IS - 6
ER -