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Resolving the Paradox of Hepatic Insulin Resistance
Open accessAbstract
Insulin resistance is associated with numerous metabolic disorders, such as obesity and type II diabetes, that currently plague our society. Although insulin normally promotes anabolic metabolism in the liver by increasing glucose consumption and lipid synthesis, insulin-resistant individuals fail to inhibit hepatic glucose production and paradoxically have increased liver lipid synthesis, leading to hyperglycemia and hypertriglyceridemia. Here, we detail the intrahepatic and extrahepatic pathways mediating insulin's control of glucose and lipid metabolism. We propose that the interplay between both of these pathways controls insulin signaling and that mis-regulation between the 2 results in the paradoxic effects seen in the insulin-resistant liver instead of the commonly proposed deficiencies in particular branches of only the direct hepatic pathway.
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“Reduced phosphorylation of the PI3K/Akt pathway is a hallmark of IR in PCOS patients10–12.”
From Efficacy and safety of GLP-1 receptor agonists on weight management and metabolic parameters in PCOS women: a meta-analysis of randomized controlled trials (2025) · cites this paper as [11]
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“hepatic insulin resistance, among other effects, has proved to result in increased gluconeogenesis, lipogenesis, and synthesis of very-low-density lipoproteins (VLDL) [22]”
From The Role of Exercise in the Interplay between Myokines, Hepatokines, Osteokines, Adipokines, and Modulation of Inflammation for Energy Substrate Redistribution and Fat Mass Loss: A Review (2020) · cites this paper as [22]
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“Postprandial glucose clearance is compromised by IR since both peripheral glucose uptake and insulin-mediated hepatic gluconeogenesis and glycogenolysis suppression fail, promoting DNL by two different molecular mechanisms [45,51].”
BackgroundLin, S., Deng, Y., Huang, J., Li, M., Sooranna, S. R., Qin, M., & Tan, B. (2025) · Scientific Reports · doi:10.1038/s41598-025-99622-4 · Cited by 35
Liver insulinization as a driver of triglyceride dysmetabolism
Cook, J. R., Hawkins, M. A., & Pajvani, U. B. (2023) · Nature Metabolism · doi:10.1038/s42255-023-00843-6 · Cited by 33
Nkonge, K. M., Nkonge, D. K., & Nkonge, T. N. (2023) · Diabetes Therapy · doi:10.1007/s13300-023-01468-4 · Cited by 36
“Insulin signaling in the liver is known to induce hepatic de novo lipogenesis by activating transcription factors and enzymes involved in fatty acid biosynthesis [78, 79].”
BackgroundZhu, Y., Zhang, H., Wei, Y., Cai, M., Gu, R., Wang, Y., Ma, Y., & Chen, L. (2020) · Journal of Food Biochemistry · doi:10.1111/jfbc.13454 · Cited by 30
Chen, C., Gu, L., Matye, D. J., Clayton, Y., Hasan, M. N., Wang, Y., Friedman, J. E., & Li, T. (2022) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2111737119 · Cited by 29
Su, M., Zhang, X., Yuan, J., Zhang, X., & Li, F. (2022) · International Journal of Molecular Sciences · doi:10.3390/ijms23063268 · Cited by 29
“Disruption of insulin secretion causes metabolic disorders, such as hyperglycemia or hypertriglyceridemia, suggesting the important role of insulin in regulating blood sugar homeostasis [3,4].”
BackgroundHOMA-IR is positively correlated with biological age and advanced aging in the US adult population
Yang, H., Gong, R., Liu, M., Deng, Y., Zheng, X., & Hu, T. (2023) · European journal of medical research · doi:10.1186/s40001-023-01448-1 · Cited by 33
“Previous studies had shown that IR contributes to the development and poor prognosis of some diseases, including diabetes [2], obesity [3], polycystic ovarian syndrome (PCOS) [4], hypertension [5], cardiovascular disease [6], kidney disease [6], Non-alcoholic fatty liver disease (NAFLD) [7],…”
BackgroundFriedline, R. H., Noh, H. L., Suk, S., Albusharif, M., Dağdeviren, S., Saengnipanthkul, S., Kim, B. K., Kim, A. M., Kim, L. H., TAUER, L. A., et al. (2024) · Nature Communications · doi:10.1038/s41467-024-49633-y · Cited by 31
Zhang, S., Wong, Y.-T., Tang, K.-Y., Kwan, H. Y., & Su, T. (2020) · Frontiers in Endocrinology · doi:10.3389/fendo.2020.572729 · Cited by 28
“In addition, insulin resistance can be acquired viamultiple mechanisms, and may affect various steps in the insulin signaling cascade which finally suppresses important metabolic pathways causing overproduction of glucose, and ultimately result in liver cell damage and death, and hence accelerates NAFLD progression (2…”
BackgroundLee, W., Kipp, Z. A., Pauss, S. N., Martinez, G. J., Bates, E. A., Badmus, O. O., Stec, D. E., & Hinds, T. D. (2025) · Clinical Science · doi:10.1042/cs20242825 · Cited by 30
“Insulin-resistant hepatocytes also threaten whole-body health as they can increase fat accumulation, reduce insulin clearance, increase circulating insulin half-life [6], and stimulate gluconeogenesis [6].”
Sphingosine‐1‐phosphate in mitochondrial function and metabolic diseases
Duan, M., Gao, P., Chen, S., Novák, P., Yin, K., & Zhu, X. (2022) · Obesity Reviews · doi:10.1111/obr.13426 · Cited by 29
“hepatocytes to insulin, resulting in increased glucose production and decreased glucose processing.(159)”
BackgroundZhang, T., Tian, J., Fan, J., Liu, X., & Wang, R. (2023) · Frontiers in Immunology · doi:10.3389/fimmu.2023.1082050 · Cited by 28
“The liver plays a central role in the systemic regulation of glucose and lipid metabolism and aberrant hepatic function is thought to be a primary driver of insulin resistance (33).”
BackgroundHepatic Phospholipid Remodeling Modulates Insulin Sensitivity and Systemic Metabolism
Tian, Y., Mehta, K., Jellinek, M. J., Sun, H., Lu, W., Shi, R., Ingram, K., Friedline, R. H., Kim, J. K., Kemper, J. K., et al. (2023) · Advanced Science · doi:10.1002/advs.202300416 · Cited by 26
Zhang, J., Song, J., Liu, S., Zhang, Y., Qiu, T., Jiang, L., Bai, J., Yao, X., Wang, N., Yang, G., et al. (2023) · The Science of The Total Environment · doi:10.1016/j.scitotenv.2023.167202 · Cited by 27
la Fuente, F. P.-D., Nocetti, D., Sacristán, C., Ruiz, P., Guerrero, J., Jorquera, G., Uribe-Oporto, E., Bucarey, J. L., Espinosa, A., & Puente-Diaz, L. (2020) · Nutrients · doi:10.3390/nu12030700 · Cited by 28
“IR in the liver is a paradoxical process, referred to as “selective hepatic insulin resistance,” in which both glucose production and lipid storage are increased, altering the normal function of the liver by the increase of gluconeogenesis and de novo lipogenesis [5].”
BackgroundZhang, S., Sousa, A., Lin, M., Iwano, A., Jain, R., Ma, B., Lee, C. M., Park, J. W., Kamle, S., Carlson, R. I., et al. (2021) · Cells · doi:10.3390/cells10020201 · Cited by 25
Rocha, S., Corvo, M. L., Freitas, M., & Fernandes, E. G. R. (2024) · International Journal of Pharmaceutics · doi:10.1016/j.ijpharm.2024.124441 · Cited by 26
Bajaj, G., Choudhary, D., Singh, V., Priyadarshi, N., Garg, P., Mantri, S. S., Rishi, V., & Singhal, N. K. (2024) · Small · doi:10.1002/smll.202409501 · Cited by 24
Che, X., Shang, X., Weixu, Xing, M., Wei, H., Li, W., Li, Z., Teng, X., & Geng, L. (2025) · International Journal of Biological Macromolecules · doi:10.1016/j.ijbiomac.2025.141204 · Cited by 24
Polarization of Macrophages in Insects: Opening Gates for Immuno-Metabolic Research
Bajgar, A., Krejčová, G., & Doležal, T. (2021) · Frontiers in Cell and Developmental Biology · doi:10.3389/fcell.2021.629238 · Cited by 22
“…is Frontiers in Cell and Developmental Biology | www.frontiersin.org 13 February 2021 | Volume 9 | Article 629238 known to respond differently to a lack of insulin signaling from most tissues in the body, which is called the “liver insulin resistance paradox ” (Santoleri and Titchenell, 2019).”
BackgroundMetabolic Phenotypes and Step by Step Evolution of Type 2 Diabetes: A New Paradigm
Cooper, I. D., Brookler, K. H., Kyriakidou, Y., Elliott, B., & Crofts, C. A. P. (2021) · Biomedicines · doi:10.3390/biomedicines9070800 · Cited by 24
Yutharaksanukul, P., Tangpromphan, P., Tunsagool, P., Sae‐tan, S., Nitisinprasert, S., Somnuk, S., Nakphaichit, M., Pusuntisumpun, N., & Wanikorn, B. (2024) · Nutrients · doi:10.3390/nu16173017 · Cited by 22
“Overweight individuals with insulin resistance are incapable of adequately suppressing hepatic glucose production, thereby resulting in hyperglycemia [51].”
BackgroundBile acid signaling in MASLD: From pathogenesis to therapeutic applications
Simbrunner, B., Paternostro, R., Reiberger, T., & Trauner, M. (2025) · Hepatology · doi:10.1097/hep.0000000000001539 · Cited by 30
Zhu, J., Chen, X., Li, F., Wei, K., Chen, J., Wei, X., & Wang, Y. (2022) · Plant Foods for Human Nutrition · doi:10.1007/s11130-022-00975-2 · Cited by 23
“S7) [26]: (1) Promoting glycogen synthesis by activating the phosphorylation of GSK3; (2) Affecting key enzyme activities in glycolysis/gluconeogenesis; (3) Transporting GLUT2 to the outer membrane of hepatocytes to enhance its utilization; (4) Reducing cAMP levels by inducing the activation of PDE3B and then improvin…”
BackgroundLi, S., Deng, X., & Zhang, Y. (2022) · Journal of Clinical Medicine · doi:10.3390/jcm11237153 · Cited by 22
“Alternatively, during the development of insulin resistance, insulin cannot inhibit the production of glucose in the liver but paradoxically accelerates the synthesis of lipids, leading to an increase in triglycerides and blood glucose [69].”
BackgroundFujiwara, S., Izawa, T., Mori, M., Atarashi, M., Yamate, J., & Kuwamura, M. (2022) · Scientific Reports · doi:10.1038/s41598-022-25838-3 · Cited by 22
Exploring the Genetic Conception of Obesity via the Dual Role of FoxO
Behl, T., Kaur, I., Sehgal, A., Singh, S., Zengin, G., Negruţ, N., Nistor-Cseppento, C. D., Pavel, F. M., Aron, R. A. C., & BUNGAU, S. G. (2021) · International Journal of Molecular Sciences · doi:10.3390/ijms22063179 · Cited by 22
“These results confirm the detrimental functions of fundamentally stimulated FoxO1 throughout extreme liver insulin resistance in hyperglycemia and the insulin receptor monolayers of the insulin signaling branch phosphatidylinositol 3-kinase-protein kinase B (PI3K-Akt)-FoxO1 underlying the hepatic insulin-controlled gl…”
BackgroundSolanum anguivi Lam. Fruits: Their Potential Effects on Type 2 Diabetes Mellitus
Nakitto, A. M. S., Muyonga, J. H., Byaruhanga, Y. B., & Wagner, A. E. (2021) · Molecules · doi:10.3390/molecules26072044 · Cited by 21
“Aberrant hepatic insulin action is hypothesized to primarily drive IR, given that higher circulating insulin levels are necessary to adequately control the blood glucose levels [68].”
BackgroundSabir, U., Irfan, H. M., Alamgeer, Ullah, A., Althobaiti, Y. S., Alshehri, F. S., & Niazi, Z. R. (2022) · Biomedicine & Pharmacotherapy · doi:10.1016/j.biopha.2022.112956 · Cited by 22
Role of non-coding RNAs on liver metabolism and NAFLD pathogenesis
Qian, G., & Morral, N. (2022) · Human Molecular Genetics · doi:10.1093/hmg/ddac088 · Cited by 21
Fasciolo, G., Napolitano, G., Aprile, M., Cataldi, S., Costa, V., Ciccodicola, A., Meo, S. D., & Venditti, P. (2022) · Antioxidants · doi:10.3390/antiox11071295 · Cited by 21
“Akt inhibits FoxO1, resulting in an inhibition of gluconeogenesis by suppressing the expression of the proteins glucose-6-phosphatase (G6pc) and phosphoenolpyruvate carboxykinase (Pck1) [51].”
BackgroundLiang, M., Huo, M., Guo, Y. Z., Zhang, Y., Xiao, X., Xv, J., Fang, L., Li, T., Wang, H., Dong, S., et al. (2022) · Frontiers in Pharmacology · doi:10.3389/fphar.2022.1084435 · Cited by 24
“PI3K/AKT signaling pathway plays an important role in the development of NAFLD (Huang et al., 2018; Santoleri and Titchenell, 2019).”
BackgroundSon, T., Jeong, I., Park, J., Jun, W., Kim, A., & Kim, O. (2023) · Frontiers in Nutrition · doi:10.3389/fnut.2023.1162992 · Cited by 24
“The activated PI3K subsequently induces protein kinase B (Akt) phosphorylation, which inhibits glycogen synthase kinase 3 and Forkhead box protein O1 and activates the mammalian target of rapamycin complex 1 to stimulate glycogen synthesis, gluconeogenesis, and lipid synthesis (21).”
Background
Metadata
- Authors
- Santoleri, D., & Titchenell, P. M.
- Affiliations
- University of Pennsylvania (US)
- Corresponding author
- Titchenell, Paul M.
- Venue
- Cellular and Molecular Gastroenterology and Hepatology
- Publisher
- Elsevier BV
- Published
- 2019
- Volume
- 7
- Issue
- 2
- Pages
- 447-456
- ISSN
- 2352-345X (ISSN-L)
- PMC
- PMC6369222
- OpenAlex
- W2899043265
- Cited by
- 336
- References
- 102
- Citations by year
- 2026: 35 · 2025: 57 · 2024: 61 · 2023: 63 · 2022: 51 · 2021: 40 · 2020: 24 · 2019: 5
- FWCI
- 2.57
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Cellular and Molecular Gastroenterology and Hepatology (publishedVersion, cc-by-nc-nd)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Institutes of Health (K01 DK111715, P30 DK19525)
- Topics
- Health Sciences › Medicine › Hepatology › Liver Disease Diagnosis and Treatment
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
- Keywords
- hepatic insulin resistance, insulin signaling, hepatic glucose production, hepatic lipid synthesis, hypertriglyceridemia, hyperglycemia, type 2 diabetes, obesity, glucose metabolism, lipid metabolism
- MeSH terms
- Animals, Humans, Insulin, Insulin Resistance, Liver, Models, Biological, Signal Transduction, Lipid Metabolism
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