Cited by 76Liver Disease Diagnosis and TreatmentAdipokines, Inflammation, and Metabolic DiseasesPeroxisome Proliferator-Activated Receptors

Adiponectin homolog novel osmotin protects obesity/diabetes-induced NAFLD by upregulating AdipoRs/PPARα signaling in ob/ob and db/db transgenic mouse models

Ahmad, Ashfaq, Ali, Tahir, Kim, Min Woo, Khan, Amjad, Jo, Myeung Hoon, Rehman, Shafiq Ur, Khan, Muhammad Sohail, Abid, Noman Bin +4 more·2019·Metabolism

Abstract

Background In metabolic disorders, adiponectin and adiponectin receptors (AdipoR1/R2) signaling has a key role in improving nonalcoholic fatty liver disease (NAFLD) in obesity-associated diabetes.Objective To the best of our knowledge, here, we reported for the first time the underlying mechanistic therapeutic efficacy of the novel osmotin, a homolog of mammalian adiponectin, against NAFLD in leptin-deficient ob/ob and db/db mice.Methods The ob/ob and db/db mice were treated with osmotin at a dose of 5 μg/g three times a week for two weeks. To co-relate the in vivo results we used the human liver carcinoma HepG2 cells, subjected to knockdown with small siRNAs of AdipoR1/R2 and PPARα genes and treated with osmotin and palmitic acid (P.A.). MTT assay, Western blotting, immunohistofluorescence assays, and plasma biochemical analyses were applied.Results Osmotin stimulated AdipoR1/R2 and its downstream APPL1/PPAR-α/AMPK/SIRT1 pathways in ob/ob and db/db mice, and HepG2 cells exposed to P.A. Mechanistically, we confirmed that knockdown of AdipoR1/R2 and PPARα by their respective siRNAs abolished the osmotin activity in HepG2 cells exposed to P.A. Overall, the in vivo and in vitro results suggested that osmotin protected against NAFLD through activation of AdipoR1/R2 and its downstream APPL1/PPAR-α/AMPK/SIRT1 pathways as shown by the reduced body weight, blood glucose level and glycated hemoglobin, improved glucose tolerance, attenuated insulin resistance and hepatic glucogenesis, regulated serum lipid parameters, and increased fatty acid oxidation and mitochondrial functions.Conclusion Our findings strongly suggest that novel osmotin might be a potential novel therapeutic tool against obesity/diabetes-induced NAFLD and other metabolic disorders.

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Crossref · 10.1016/j.metabol.2018.10.004

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Authors
Ahmad, A., Ali, T., Kim, M. W., Khan, A., Jo, M. H., Rehman, S. U., Khan, M. S., Abid, N. B., Khan, M., Ullah, R., Jo, M. G., & Kim, M. O.
Affiliations
Gyeongsang National University (KR)
Corresponding author
Kim, Myeong Ok
Venue
Metabolism
Publisher
Elsevier BV
Published
2019-01
Volume
90
Pages
31-43
ISSN
0026-0495 (ISSN-L)
OpenAlex
W2898212430
Cited by
76
References
64
Citations by year
2026: 4 · 2025: 1 · 2024: 10 · 2023: 9 · 2022: 13 · 2021: 13 · 2020: 15 · 2019: 10 · 2018: 1
FWCI
7.61
Type
journal article
Language
en
Open access
closed
Locations
  • Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Research Foundation of Korea
  • Ministry of Science, ICT and Future Planning (2016M3C7A1904391)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Peroxisome Proliferator-Activated Receptors
Keywords
osmotin, non-alcoholic fatty liver disease, obesity, diabetes mellitus, adiponectin receptors, PPARα, APPL1, AMPK/SIRT1 signaling, insulin resistance, glucose tolerance, fatty acid oxidation, mitochondrial function, leptin deficiency, ob/ob mice, db/db mice, palmitic acid, HepG2 cells
MeSH terms
Animals, Diabetes Mellitus, Experimental, Disease Models, Animal, Humans, Hypoglycemic Agents, Liver, Male, Mice, Inbred C57BL, Mice, Obese, Mice, Transgenic, Obesity, Plant Proteins, Signal Transduction, Up-Regulation, Anti-Obesity Agents, Cytoprotection, Leptin, PPAR alpha, Lipid Metabolism, Mice, Adiponectin, Receptors, Leptin, Receptors, Adiponectin, Hep G2 Cells, Non-alcoholic Fatty Liver Disease

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