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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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“Magnesium also serves as a cofactor for the insulin receptor b , regulating tyrosine kinase activity in peripheral tissues. promotes glucose transport, glycogen synthesis, and protein synthesis through the PI3K/AKT signaling pathway (92).”
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“Additionally, we measured the expression levels of Akt, an energy sensor that plays a central role in glucose metabolism and is known to be altered in obesity (44–46).”
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“However, in the context of HG, such as in diabetes, this pathway becomes dysregulated (27).”
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“Reactivation of this inhibited AKT pathway may alleviate obesity and insulin resistance, thereby improving T2DM 117–119 .”
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An, Y.-L., Han, P.-Y., Zhang, C., Yue, Y.-Q., Wen, C., Meng, Y., Li, H., & Li, X. (2025) · International Journal of Biological Macromolecules · doi:10.1016/j.ijbiomac.2025.141901 · Cited by 4
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“The PI3K/AKT pathway, a key regulator of glucose uptake, lipid metabolism, and protein synthesis in skeletal muscles [26] may enhance anabolic processes and alter metabolite turnover, including myo-inositol, when activated by TMSC EVs.”
Nair, J. M., Chauhan, G., Prasad, G., Bandesh, K., Giri, A. K., Chakraborty, S., Marwaha, R. K., Mathur, S. R., Choudhury, D., Tandon, N., et al. (2025) · Obesity · doi:10.1002/oby.24248 · Cited by 4
“Conversely, IPMK highly expressed in adipose tissue may influence OB via the PI3K/AKT pathway and by affecting the binding of NKX-2 family transcription factors, highly expressed in the hypothalamic POMC neurons, thereby modulating the leptin-melanocortin pathway [39,40].”
Soltany, A., Daryanoosh, F., Gholampour, F., Hosseini, N. S., & Khoramipour, K. (2025) · Journal of Cellular and Molecular Medicine · doi:10.1111/jcmm.70396 · Cited by 4
“HN activates the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT) signalling pathway, inhibiting the proapoptotic proteins Bax, Bak, and caspase-9, which can improve IR and glucose consumption and reduce gluconeogenesis [17, 22].”
Effects of dechlorane plus on hepatic pathology, metabolic health and gut microbiota in male mice.
Liu, W., He, Q.-Y., Yue, C.-X., Xu, T., & Hang, X. (2024) · Science of the Total Environment · doi:10.1016/j.scitotenv.2024.177532 · Cited by 4
Stenbäck, V., Lehtonen, I., Mäkelä, K. A., Raza, G. S., Ylinen, V. P., Valtonen, R. I. P., Hamari, T., Walkowiak, J., Tulppo, M. P., & Herzig, K. (2024) · International Journal of Molecular Sciences · doi:10.3390/ijms25179135 · Cited by 4
“…functions that relate to the development of obesity and diabetes mellitus by affecting the translocation of GLUT 4 transporter and lipid metabolism via Forkhead box protein O1 (FoxO1), mammalian target of rapamycin complex 1 (mTORC1), and sterol regulatory element-binding proteins (SREBPs) [24,28].”
BackgroundModeling sex-specific whole-body metabolic responses to feeding and fasting
Abo, S. M. C., & Layton, A. T. (2024) · Computers in Biology and Medicine · doi:10.1016/j.compbiomed.2024.109024 · Cited by 5
Singh, A. D., Chawda, M. B., & Kulkarni, Y. A. (2024) · Cardiovascular Toxicology · doi:10.1007/s12012-024-09891-0 · Cited by 4
“The proper functioning of the PI3K/Akt pathway is necessary for the insulin-dependent regulation of both systemic and cellular metabolism [12, 13].”
Yu, Z., Yang, J., Jiang, Y., Wei, M., Lyu, Y., Yang, D., Shen, S., Han, Y., & Li, M. (2024) · Metabolic Brain Disease · doi:10.1007/s11011-024-01376-x · Cited by 4
Ma, Y., Sun, X., & Yao, X. (2024) · Mitochondrion · doi:10.1016/j.mito.2024.101929 · Cited by 6
Ashiqueali, S., Schneider, A., Zhu, X., Juszczyk, E., Mansoor, M. A. M., Zhu, Y. X., Fang, Y., Zanini, B. M., Garcia, D. N., Hayslip, N., et al. (2024) · Aging Cell · doi:10.1111/acel.14227 · Cited by 4
“Specifically, the Pi3k/Akt pathway is dysregulated in T2DM and is also a promising target for NAFLD due to its regulation of downstream Mtor and Srebpc , which induce lipogenesis in the liver (Feng et al., 2022; Huang et al., 2018).”
BackgroundChen, C., Jiang, C., Lin, T., Hu, Y., Wu, H., Xiang, Q., Yang, M.-G., Wang, S., Han, X., & Tao, J. (2024) · Acta Physiologica · doi:10.1111/apha.14154 · Cited by 4
“8 Proper activation of this pathway is necessary for insulin to work properly, but kinase inhibitors directly targeting PI3K-Akt and its downstream effectors might disrupt the metabolic balance.”
BackgroundPichetkun, V., Khine, H., Srifa, S., Nukulkit, S., Nuengchamnong, N., Hansapaiboon, S., Saenmuangchin, R., Chaotham, C., & Chansriniyom, C. (2024) · Scientific Reports · doi:10.1038/s41598-024-59357-0 · Cited by 4
“Approximately 90% and 10% of postprandial glucose uptake is by skeletal muscle and adipose tissue, respectively 22 .”
Haneishi, Y., Treppiccione, L., Maurano, F., Luongo, D., Miyamoto, J., & Rossi, M. (2024) · Molecular Nutrition & Food Research · doi:10.1002/mnfr.202300779 · Cited by 4
Fernández‐Arjona, M. D. M., Navarro, J. A., López-Gambero, A. J., de Ceglia, M., Rodríguez-Pozo, M., Rubio, L., de Fonseca, F. R., Barrios, V., Chowen, J. A., Argente, J., et al. (2024) · Biology of Sex Differences · doi:10.1186/s13293-024-00603-5 · Cited by 4
“IGF1 elicits transient insulin-like activation of the PI3K p85 subunit, leading to AKT phosphorylation and GSK3 inactivation, and thereby facilitating glycogen synthesis, fatty acid synthesis for storage, cell apoptosis protection and cell cycle progression [64].”
Erukainure, O. L., & Chukwuma, C. I. (2024) · Plants · doi:10.3390/plants13050665 · Cited by 7
“PI-3 kinase has been reported for its role in insulin signaling and insulin-mediated translocation of GLUT4, thereby driving muscle glucose uptake [46,47].”
BackgroundBai, Y.-M., Liang, S., & Zhou, B. (2024) · Aging · doi:10.18632/aging.205559 · Cited by 4
Molecular Insights of Nonalcoholic Fatty Liver Disease Pathogenesis
Dawood, R. M., Salum, G. M., El-Meguid, M. A., & Fotouh, B. E.-S. (2024) · Journal of Interferon & Cytokine Research · doi:10.1089/jir.2023.0162 · Cited by 4
“Glucose and lipid metabolism are regulated through binding the insulin with insulin receptors that elicit tyrosine phosphorylation and then activate phosphatidylinositol-3-kinase (PI3K/AKT) pathway (Huang et al., 2018).”
Jo, S.-L., & Hong, E. (2024) · Antioxidants · doi:10.3390/antiox13020230 · Cited by 6
“However, in insulin-resistant brains, ER stress occurs, leading to impairment of the PI3K/AKT pathway [77,78].”
BackgroundGöttig, L., & Schreiner, S. (2024) · Tumour Virus Research · doi:10.1016/j.tvr.2024.200277 · Cited by 4
“Insulin resistance in adipose tissue can lead to abnormal glucose metabolism [210,211], causing adipose tissue to become dysfunctional and often enlarged, fostering a pro-inflammatory and hyperlipidemic environment that ultimately promotes adipose hypertrophy and obesity [212].”
BackgroundOthman, A. M., Ibrahim, I. A., Saleh, S. M., Abo–Elmatty, D. M., Mesbah, N. M., & Abdel-Hamed, A. R. (2023) · Biomedicines · doi:10.3390/biomedicines11123300 · Cited by 4
“It mediates growth factor signals and essential cellular processes such as glucose homeostasis, lipid metabolism, protein synthesis, and cell proliferation and survival [17].”
BackgroundInfluence of metabolic stress and metformin on synaptic protein profile in SH‐SY5Y‐derived neurons
Yang, A. J. T., Mohammad, A., Finch, M. S., Tsiani, E., Spencer, G. E., Necakov, A., & MacPherson, R. E. K. (2023) · Physiological Reports · doi:10.14814/phy2.15852 · Cited by 3
“Impairments in Akt action are observed with brain IR and AD, and Akt signaling impairments in the brain play a comparative role in dysregulated insulin action with that seen with T2D and peripheral IR (Huang et al., 2018).”
BackgroundFunctional analysis of differentially expressed circular RNAs in sheep subcutaneous fat
Liu, T., Feng, H., Yousuf, S., Xie, L., & Miao, X. (2023) · BMC Genomics · doi:10.1186/s12864-023-09401-6 · Cited by 4
“PI3K/Akt signaling pathway can reduce liver glucose production and glycogen decomposition, increase the synthesis of glycogen and fatty acids, and store energy for other tissues [61].”
BackgroundMubarak, H. A., Kamal, M. M., Mahmoud, Y., Abd-Elsamea, F. S., Abdelbary, E. R., Gamea, M. G., & El-Mahdy, R. I. (2023) · Journal of Cellular Biochemistry · doi:10.1002/jcb.30482 · Cited by 4
“11,45 Therefore, enhanced expression of PI3K, Akt, and PDX ‐ 1 is closely linked to the normal β ‐ cells physiology, whereas reduced activity is related to the dysfunction in insulin biosynthesis and secretion.”
BackgroundJi, C., Ma, J., Feng, C., Zhu, H., Gao, Y., Huang, J. C., Shen, H., & Wei, Y. (2023) · Clinical Cosmetic and Investigational Dermatology · doi:10.2147/ccid.s425295 · Cited by 5
Wu, Y., Wu, Y.-T., Zhang, Z., Cai, J., Zong, M.-H., Li, L., Zhang, X., Wu, H.-C., & Li, B. (2023) · ACS Food Science & Technology · doi:10.1021/acsfoodscitech.3c00176 · Cited by 4
miRDM-rfGA: Genetic algorithm-based identification of a miRNA set for detecting type 2 diabetes
Park, A., & Nam, S. (2023) · BMC Medical Genomics · doi:10.1186/s12920-023-01636-2 · Cited by 4
“Insulin resistance occurs when PI3K signaling is inhibited [59, 60] and has been observed in adipocytes [61, 62], muscle cells [57], the liver [63], and blood [56].”
BackgroundZheng, X.-W., Zhang, Y., Xu, J., Li, X.-Y., Wen, H., Zhang, X.-G., Liu, A., & Zhang, J. (2023) · Frontiers in Bioscience · doi:10.31083/j.fbl2808164 · Cited by 4
“Furthermore, a related study has proved that the PI3K-AKT signaling pathway is one of the key insulin signaling pathways involved in the regulation of glucose and lipid metabolism [73].”
BackgroundOlanzapine manipulates neuroactive signals and may onset metabolic disturbances
Khanal, P., Zargari, F., Dey, Y. N., & Nikfarjam, Z. (2023) · Journal of Biomolecular Structure and Dynamics · doi:10.1080/07391102.2023.2235617 · Cited by 5
“PI3K-Akt signaling pathway has been well documented for the upregulation of the lipid biosynthesis and downregulation of lipolysis which is regulated by SREBP; regulator of fatty acid synthase and FOXO1; regulates the expression of the adipose triglyceride lipase, are considered as the substrates for AKT-metabolism (H…”
A diabetes-like biochemical and behavioural phenotype of Drosophila induced by predator stress
Krama, T., Bahhir, D., Ots, L., Popovs, S., Bartkevičs, V., Pugajeva, I., Krams, R., Merivee, E., Must, A., Rantala, M. J., et al. (2023) · Proceedings of the Royal Society B Biological Sciences · doi:10.1098/rspb.2023.0442 · Cited by 4
“via GLUT4-dependent pathway in muscles), and defects in this pathway are therefore closely associated with the development of diabetes [46].”
BackgroundOmentin-1 and diabetes: more evidence but far from enough
Xu, J., Li, M., Jiang, X., Wang, Y., Ma, H., Zhou, Y., Tian, M., & Liu, Y. (2023) · Archives of Physiology and Biochemistry · doi:10.1080/13813455.2023.2230380 · Cited by 10
“Pi3K/Akt is a traditional signalling pathway that exerts profound effects on diverse processes, including cell proliferation, survival, and energy metabolism. impaired Pi3K/Akt signalling pathway may lead to insulin resistance, metabolic disorders, and diabetes (Huang et al. 2018).”
Jiménez-Chávez, A., Morales-Rubio, R. A., Sánchez-Gasca, E., Rivera-Rosas, M., Uribe-Ramírez, M., Amador-Muñóz, O., Martínez-Domínguez, Y. M., Rosas‐Pérez, I., Choy, E. H. Y., Herman, D. A., et al. (2023) · Environmental Toxicology and Pharmacology · doi:10.1016/j.etap.2023.104115 · Cited by 4
Zhou, Y., Zhu, J., Gu, M., & Gu, K. (2023) · Journal of Oncology · doi:10.1155/2023/6851036 · Cited by 4
Malar, D. S., Prasanth, M. I., Brimson, J. M., Verma, K., Prasansuklab, A., & Tencomnao, T. (2023) · Nutrition and Healthy Aging · doi:10.3233/nha-220177 · Cited by 7
“Down-regulation of the AKT signaling pathway has been observed under hyperglycemic conditions in cellular models [76, 77].”
BackgroundTian, C., Qiu, M., Lv, H.-Z., Yue, F., & Zhou, F.-F. (2022) · ACS Omega · doi:10.1021/acsomega.2c05663 · Cited by 4
Sleeve gastrectomy attenuated diabetes-related cognitive decline in diabetic rats
Ding, H., Liu, C., Zhang, S., Li, B., Xu, Q., Shi, B., Li, S., Dong, S., Ma, X., Zhang, Y., et al. (2022) · Frontiers in Endocrinology · doi:10.3389/fendo.2022.1015819 · Cited by 5
“PI3K was activated by direct interaction with insulin receptor substrate 1 (IRS-1), and then the Akt was phosphorylated, which in turn induced the phosphorylation of GSK3b and ultimately promoted the balance of blood glucose (53).”
BackgroundIL-25 directly modulates adipocyte function and inflammation through the regulation of adiponectin
Jeerawattanawart, S., Siripurkpong, P., Roytrakul, S., & Angkasekwinai, P. (2022) · Inflammation Research · doi:10.1007/s00011-022-01606-x · Cited by 4
“PI3K/AKT signaling pathway involved in the regulation of metabolic function in adipocytes [46].”
BackgroundChen, C., Fu, D., Wu, Y., Huang, C.-H., & Huang, P. (2022) · Clinical Complementary Medicine and Pharmacology · doi:10.1016/j.ccmp.2022.100060 · Cited by 4
Molecular Mechanisms Underlying Reproductive Dysfunction in Polycystic Ovary Syndrome
Kobayashi, H., Shigetomi, H., Nishio, M., Umetani, M., Imanaka, S., & Hashimoto, H. (2026) · Reproductive Sciences · doi:10.1007/s43032-026-02097-5 · Cited by 3
“…PI3K–AKT and subsequently mTORC1, which phosphorylates S6K1 and Eukaryotic Translation Initiation Factor 4E-Binding Protein 1 (4E-BP1) downstream, thereby integratively regulating glucose and lipid metabolism, protein metabolism, cell proliferation, survival, apoptosis, and autophagy [133].”
Voros, C., Chatzinikolaou, F. G., Papadimas, G. K., Papapanagiotou, I., Karpouzos, A., Koulakmanidis, A.-M., Athanasiou, D., Bananis, K., Athanasiou, A. I., Athanasiou, A. V., et al. (2026) · International Journal of Molecular Sciences · doi:10.3390/ijms27083344 · Cited by 3
Yeerbao, Z., Li, X., Zhang, L., Du, G., Tang, J., Jiang, S., Ru, X., Li, D.-L., Abulimiti, D., Chen, L., et al. (2026) · Frontiers in Endocrinology · doi:10.3389/fendo.2026.1760943 · Cited by 3
“…involves a series of key molecules, including the insulin receptor (IR), insulin receptor substrates (IRS), phosphatidylinositol 3-kinase (PI3K), and protein kinase B (Akt) (41), which collectively regulate a broad spectrum of genes and protein functions related to anabolism and cell survival.”
Huu, T. N., Thanh, H. D., Kim, M.-K., Sah, D. K., Trinh, V. H., Yoon, H. J., Choi, J. M., Lee, G.-H., Kim, S., & Lee, S.-R. (2026) · npj Metabolic Health and Disease · doi:10.1038/s44324-025-00094-x · Cited by 3
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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