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The PI3K/AKT pathway in obesity and type 2 diabetes
Open accessAbstract
Obesity and type 2 diabetes mellitus are complicated metabolic diseases that affect multiple organs and are characterized by hyperglycaemia. Currently, stable and effective treatments for obesity and type 2 diabetes mellitus are not available. Therefore, the mechanisms leading to obesity and diabetes and more effective ways to treat obesity and diabetes should be identified. Based on accumulated evidences, the PI3K/AKT signalling pathway is required for normal metabolism due to its characteristics, and its imbalance leads to the development of obesity and type 2 diabetes mellitus. This review focuses on the role of PI3K/AKT signalling in the skeletal muscle, adipose tissue, liver, brain and pancreas, and discusses how this signalling pathway affects the development of the aforementioned diseases. We also summarize evidences for recently identified therapeutic targets of the PI3K/AKT pathway as treatments for obesity and type 2 diabetes mellitus. PI3K/AKT pathway damaged in various tissues of the body leads to obesity and type 2 diabetes as the result of insulin resistance, and in turn, insulin resistance exacerbates the PI3K/AKT pathway, forming a vicious circle.
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“AKT activation leads to increased glucose transporter 4 (GLUT4) expression and translocation, ultimately leading to increased glucose uptake.”
From Non-Diabetic Hypoglycemia: Evaluation and Management in Adults (2025) · cites this paper as [48]
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“PI3K is an enzyme that activates protein kinase B (AKT), which regulates glucose metabolism, among other intracellular functions [48].”
From Non-Diabetic Hypoglycemia: Evaluation and Management in Adults (2025) · cites this paper as [48]
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“The IRS-1/PI3K/AKT pathway is one of the main regulatory pathways of IR and has integrative roles in glucose and lipid metabolism [31].”
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“They phosphorylate IRS-1 on serine residues [62 ], such as Ser 307 .”
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“In recent studies, treatment targeting the PI3K/AKT pathway has a certain effect on glycolipid metabolic diseases, such as obesity and DM (Huang et al., 2018).”
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“All are critical steps for stimulating insulin-induced glucose transport [51].”
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“AKT1 is highly expressed in many tissues, AKT2 is mainly expressed in insulin-sensitive tissues and is present at low levels in other tissues, and AKT3 is only expressed in the brain and testis [101].”
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Autonomic Nervous System and Cardiac Metabolism
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The Role of the PI3K/Akt/mTOR Axis in Head and Neck Squamous Cell Carcinoma
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“While AKT2 is found mostly in insulin-sensitive tissues and at low levels in other tissues, AKT3 is solely expressed in the brain and testis [29].”
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“In obesity-induced chronic inflammation, adipokines and adipose hypertrophy lead to insulin resistance through inhibiting PI3K/AKT signaling which suppresses lipolysis, glucose utilization (GU), and the ability of sterol regulatory element binding protein (SREBP) to boost lipogenesis [131].”
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“The most critical of these is the PI3K/Akt pathway, which governs glucose uptake, energy homeostasis, and neuronal survival [154, 155].”
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Photobiomodulation activates the PI3K/AKT pathway in diabetic fibroblast cells in vitro.
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“IRS-1 phosphorylated at the serine site (especially Ser307) can trigger its conformational alternation, becoming an unsuitable substrate to interact with insulin receptors and successively retarding the insulin signal cascade (Huang et al. 2018).”
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“Therefore, effective control of insulin resistance is important for the prevention and treat‑ ment of diabetes (86).”
Metadata
- Authors
- Huang, X., Liu, G., Guo, J., & Su, Z.
- Affiliations
- Guangdong Pharmaceutical University (CN)
- Shenzhen Center for Disease Control and Prevention (CN)
- Corresponding author
- Guo, Jiao
- Su, Zhengquan
- Venue
- International Journal of Biological Sciences
- Publisher
- Ivyspring International Publisher
- Published
- 2018
- Volume
- 14
- Issue
- 11
- Pages
- 1483-1496
- ISSN
- 1449-2288 (ISSN-L)
- PMC
- PMC6158718
- OpenAlex
- W2886504687
- Cited by
- 1,673
- References
- 171
- Citations by year
- 2026: 197 · 2025: 296 · 2024: 282 · 2023: 258 · 2022: 246 · 2021: 211 · 2020: 136 · 2019: 44 · 2018: 3
- FWCI
- 9.71
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- cc-by-nc
- Locations
- International Journal of Biological Sciences (publishedVersion, cc-by-nc)
- Europe PMC (PubMed Central) (publishedVersion, other-oa)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China (2017-02, 81173107)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adipokines, Inflammation, and Metabolic Diseases
- Keywords
- PI3K/Akt signaling, obesity, type 2 diabetes, insulin resistance, hyperglycemia, skeletal muscle, adipose tissue, liver, pancreas, therapeutic target, metabolic disorders
- MeSH terms
- Animals, Diabetes Mellitus, Type 2, Humans, Insulin Resistance, Obesity, Signal Transduction, Phosphatidylinositol 3-Kinases, Proto-Oncogene Proteins c-akt
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