Influence of a High-fat Diet on Cardiac iNOS in Female Rats
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Autori
Jovanović, AleksandraSudar, Emina
Obradović, Milan M.
Pitt, Samantha J.
Stewart, Alan J.
Zafirović, Sonja
Stanimirović, Julijana
Radak, Đorđe J.
Isenović, Esma R.
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Background: Overexpression of inducible nitric oxide synthase (iNOS) is a key link between high-fat (HF) diet induced obesity and cardiovascular disease. Oestradiol has cardioprotective effects that may be mediated through reduction of iNOS activity/expression. Methods: In the present study, female Wistar rats were fed a standard diet or a HF diet (42% fat) for 10 weeks. iNOS gene and protein expressions were measured in heart tissue. HF-fed rats exhibited a significant increase in cardiac iNOS mRNA by 695% (p LT 0.05), iNOS protein level by 248% (p LT 0.01), without changes in nitrate/nitrite levels. Expression of CD36 protein in plasma membranes was increased by 37% (p LT 0.05), while the concentration of free fatty acids (FFA) was reduced by 25% (p LT 0.01) in HF-fed rats. Expression of the p50 subunit of nuclear factor-kappa B (NF kappa B-p50) in heart was increased by 77% (p LT 0.01) in HF-fed rats. Expression of protein kinase B (Akt) and extracellular signal-regulated kinases 1/...2 (ERK1/2) were unchanged between the groups. There was a significant increase in the ratio of phospho-Akt/total Akt but not for phospho-ERK1/2/total ERK1/2 in HF-fed rats. Estrogen receptor-levels (by 50%; p LT 0.05) and serum oestradiol concentrations (by 35%; p LT 0.05) were shown to be significantly reduced in HF-fed rats. Results and Conclusion: Our results revealed that a HF diet led to increased iNOS expression, most likely via a mechanism involving Akt and NF kappa B-p50 proteins. Decreased levels of oestradiol and ER protein in the HF-fed group, in combination with increased iNOS levels are consistent with the hypothesis that oestradiol has a cardioprotective effect through its ability to regulate iNOS expression.
Ključne reči:
Cardioprotection / cardiovascular disease / oestradiol / inducible nitric oxide synthase / insulin resistance / obesityIzvor:
Current Vascular Pharmacology, 2017, 15, 5, 491-500Finansiranje / projekti:
- Karotidna bolest u Srbiji - patološka dinamika, prevencija, dijagnostika i inovativni terapijski postupci (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-41002)
- Hormonska regulacija ekspresije i aktivnosti azot oksid sintaze i natrijum-kalijumove pumpe u eksperimentalnim modelima insulinske rezistencije, dijabetesa i kardiovaskularnih poremećaja (RS-MESTD-Basic Research (BR or ON)-173033)
DOI: 10.2174/1570161114666161025101303
ISSN: 1570-1611; 1875-6212
PubMed: 27781956
WoS: 000407476700011
Scopus: 2-s2.0-85041327847
Institucija/grupa
VinčaTY - JOUR AU - Jovanović, Aleksandra AU - Sudar, Emina AU - Obradović, Milan M. AU - Pitt, Samantha J. AU - Stewart, Alan J. AU - Zafirović, Sonja AU - Stanimirović, Julijana AU - Radak, Đorđe J. AU - Isenović, Esma R. PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1678 AB - Background: Overexpression of inducible nitric oxide synthase (iNOS) is a key link between high-fat (HF) diet induced obesity and cardiovascular disease. Oestradiol has cardioprotective effects that may be mediated through reduction of iNOS activity/expression. Methods: In the present study, female Wistar rats were fed a standard diet or a HF diet (42% fat) for 10 weeks. iNOS gene and protein expressions were measured in heart tissue. HF-fed rats exhibited a significant increase in cardiac iNOS mRNA by 695% (p LT 0.05), iNOS protein level by 248% (p LT 0.01), without changes in nitrate/nitrite levels. Expression of CD36 protein in plasma membranes was increased by 37% (p LT 0.05), while the concentration of free fatty acids (FFA) was reduced by 25% (p LT 0.01) in HF-fed rats. Expression of the p50 subunit of nuclear factor-kappa B (NF kappa B-p50) in heart was increased by 77% (p LT 0.01) in HF-fed rats. Expression of protein kinase B (Akt) and extracellular signal-regulated kinases 1/2 (ERK1/2) were unchanged between the groups. There was a significant increase in the ratio of phospho-Akt/total Akt but not for phospho-ERK1/2/total ERK1/2 in HF-fed rats. Estrogen receptor-levels (by 50%; p LT 0.05) and serum oestradiol concentrations (by 35%; p LT 0.05) were shown to be significantly reduced in HF-fed rats. Results and Conclusion: Our results revealed that a HF diet led to increased iNOS expression, most likely via a mechanism involving Akt and NF kappa B-p50 proteins. Decreased levels of oestradiol and ER protein in the HF-fed group, in combination with increased iNOS levels are consistent with the hypothesis that oestradiol has a cardioprotective effect through its ability to regulate iNOS expression. T2 - Current Vascular Pharmacology T1 - Influence of a High-fat Diet on Cardiac iNOS in Female Rats VL - 15 IS - 5 SP - 491 EP - 500 DO - 10.2174/1570161114666161025101303 ER -
@article{ author = "Jovanović, Aleksandra and Sudar, Emina and Obradović, Milan M. and Pitt, Samantha J. and Stewart, Alan J. and Zafirović, Sonja and Stanimirović, Julijana and Radak, Đorđe J. and Isenović, Esma R.", year = "2017", abstract = "Background: Overexpression of inducible nitric oxide synthase (iNOS) is a key link between high-fat (HF) diet induced obesity and cardiovascular disease. Oestradiol has cardioprotective effects that may be mediated through reduction of iNOS activity/expression. Methods: In the present study, female Wistar rats were fed a standard diet or a HF diet (42% fat) for 10 weeks. iNOS gene and protein expressions were measured in heart tissue. HF-fed rats exhibited a significant increase in cardiac iNOS mRNA by 695% (p LT 0.05), iNOS protein level by 248% (p LT 0.01), without changes in nitrate/nitrite levels. Expression of CD36 protein in plasma membranes was increased by 37% (p LT 0.05), while the concentration of free fatty acids (FFA) was reduced by 25% (p LT 0.01) in HF-fed rats. Expression of the p50 subunit of nuclear factor-kappa B (NF kappa B-p50) in heart was increased by 77% (p LT 0.01) in HF-fed rats. Expression of protein kinase B (Akt) and extracellular signal-regulated kinases 1/2 (ERK1/2) were unchanged between the groups. There was a significant increase in the ratio of phospho-Akt/total Akt but not for phospho-ERK1/2/total ERK1/2 in HF-fed rats. Estrogen receptor-levels (by 50%; p LT 0.05) and serum oestradiol concentrations (by 35%; p LT 0.05) were shown to be significantly reduced in HF-fed rats. Results and Conclusion: Our results revealed that a HF diet led to increased iNOS expression, most likely via a mechanism involving Akt and NF kappa B-p50 proteins. Decreased levels of oestradiol and ER protein in the HF-fed group, in combination with increased iNOS levels are consistent with the hypothesis that oestradiol has a cardioprotective effect through its ability to regulate iNOS expression.", journal = "Current Vascular Pharmacology", title = "Influence of a High-fat Diet on Cardiac iNOS in Female Rats", volume = "15", number = "5", pages = "491-500", doi = "10.2174/1570161114666161025101303" }
Jovanović, A., Sudar, E., Obradović, M. M., Pitt, S. J., Stewart, A. J., Zafirović, S., Stanimirović, J., Radak, Đ. J.,& Isenović, E. R.. (2017). Influence of a High-fat Diet on Cardiac iNOS in Female Rats. in Current Vascular Pharmacology, 15(5), 491-500. https://doi.org/10.2174/1570161114666161025101303
Jovanović A, Sudar E, Obradović MM, Pitt SJ, Stewart AJ, Zafirović S, Stanimirović J, Radak ĐJ, Isenović ER. Influence of a High-fat Diet on Cardiac iNOS in Female Rats. in Current Vascular Pharmacology. 2017;15(5):491-500. doi:10.2174/1570161114666161025101303 .
Jovanović, Aleksandra, Sudar, Emina, Obradović, Milan M., Pitt, Samantha J., Stewart, Alan J., Zafirović, Sonja, Stanimirović, Julijana, Radak, Đorđe J., Isenović, Esma R., "Influence of a High-fat Diet on Cardiac iNOS in Female Rats" in Current Vascular Pharmacology, 15, no. 5 (2017):491-500, https://doi.org/10.2174/1570161114666161025101303 . .