Jump to content

User:Neuralia/sandbox/FGF21/new

From Wikipedia, the free encyclopedia
Fibroblast growth factor 21' is a protein that in mammals is encoded by the FGF21 gene.[1][2][3] FGF21 is a hepatokine – i.e., a hormone secreted by the liver – that regulates multiple metabolic pathways through the organ system. Given its properties as a potent activator of glucose uptake by adipocytes and its capacity to normalize glucose and triglyceride levels in genetically obese mice, FGF21 was proposed as a possible therapeutic agent for diabetes in 2005.[4] In 2022, Novartis described an FGF21 analog capable of reducing triglyceride levels in mildly hypertriglyceridemic human subjects.[5]

Within the liver, FGF21 is responsable for fatty acid oxidation both upon fasting and consumption of a ketogenic diet.[6] In addition it has anti-inflammatory properties limiting toxicity if the liver is exposed to toxic agents, including ethanol and tylenol.[7][8]

Also, FGF21 has effects on sugar and alcohol consumption. Mice overexpressing FGF21 or treated with FGF21 avoid consuming both fructose and alcohol. Thus, FGF21 inhibits simple sugar intake and preference for sweet foods. These actions are mediated through FGF21 receptors in the paraventricular nucleus of the hypothalamus and correlate with reduced dopamine neurotransmission within the nucleus accumbens.[9][10][11] A single-nucleotide polymorphism of the FGF21 gene – the FGF21 rs838133 variant (frequency 44.7%) – has been identified as a genetic mechanism responsible for the sweet tooth behavioral phenotype, a trait associated with cravings for sweets and high sugar consumption, in both humans and mice.[12][13][14]

FGF family[edit]

FGFs act through a family of four FGF receptors. FGF family members possess broad mitogenic and cell survival activities and are involved in a variety of biological processes including embryonic development, cell growth, morphogenesis, tissue repair, tumor growth and invasion.[2] FGF21 is a member of the fibroblast growth factor (FGF) family, more specifically a member of the endocrine subfamily which includes FGF23 and FGF15/19. Unlike other FGFs, endocrine FGFs are secreted into the circulation and may act on distant target organs.[15]

FGF21 receptor[edit]

The binding of FGFs to their receptors is generally complex, requiring both interaction of the FGF molecule with the FGF receptor itself, and binding to a heparin moieity in the receptor through a heparin binding domain in FGF. Endocrine FGFs -like FGF21- lack such a binding domain and thus can be released into the circulation. FGF21 is the primary endogenous agonist of the FGF21 receptor, which is composed of the co-receptors FGF receptor 1 and β-Klotho, a special type of β-glucuronidase.[16] Loss of β-Klotho abolishes all effects of FGF21 activity.[17][18]

Function[edit]

FGF21 is a highly potent insulin sensitizer.[18] FGF21 stimulates glucose uptake in adipocytes but not in other cell types.[4] This effect is additive to the activity of insulin.[19] FGF21 induces the insulin-sensitizing hormone adiponectin.[20]

FGF21 treatment of adipocytes is associated with phosphorylation of FRS2, a protein linking FGF receptors to the Ras/MAP kinase pathway.[4] FGF21 injection in ob/ob mice results in an increase in Glut1 in adipose tissue.[4] FGF21 also protects mice from diet-induced obesity when overexpressed in transgenic mice and lowers blood glucose and triglyceride levels when administered to diabetic rodents.[4] Treatment of mice with FGF21 results in increased energy expenditure, fat utilization and lipid excretion.[21] FGF21 has also been reported to cause the "browning" of white fat through a brain-dependent mechanism.[22]

FGF21 stimulates ketogenesis in the liver.[23] In adipocites, FGF21 induces mitochondrial biogenesis and function by activating PGC-1α.[24]

In late-pregnant cows, FGF21 plasma levels change from undetectable to high upon parturition and the begining of lactation, apparently reflecting a change to an energy insufficient state during early lactation, where the liver was the major source of FGF21.[25]

Regulation[edit]

Expression of the FGF21 gene is primarily upregulated by PPAR-α in the liver, and by PPAR-γ in adipose tissue.[26] FGF21 is specifically induced by mitochondrial 3-hydroxy-3-methylglutaryl-CoA synthase 2 (HMGCS2) activity. The oxidized form of ketone bodies (acetoacetate) in a cultured medium also induced FGF21, possibly via a sirtuin 1 (SIRT1)-dependent mechanism.[27] HMGCS2 activity has also been shown to be increased by deacetylation of lysines 310, 447, and 473 via SIRT3 in the mitochondria.[28]

While FGF21 is expressed in numerous tissues, including liver, brown adipose tissue, white adipose tissue (WAT) and pancreas, circulating levels of FGF21 are derived specifically from the liver in mice.[29] In liver, FGF21 expression is regulated by PPARα[30] and levels rise substantially with both fasting and consumption of ketogenic diets.

Liver X receptor (LXR) represses FGF21 in humans via an LXR response element located from -37 to -22 bp on the human FGF21 promoter.[31]

At a systemic level, thyroid hormone can regulate adipose and hepatic FGF21 expression and serum levels in mice.[32]

Clinical significance[edit]

Serum FGF21 levels are significantly increased in obesity and in patients with type 2 diabetes mellitus (T2DM) indicating a state of FGF21-resistance.[33][34]

Elevated levels also correlate with liver fat content in non-alcoholic fatty liver disease[35] and positively correlate with Body Mass Index in humans, again suggesting obesity as a FGF21-resistant state.[36] Both high sugar and low protein diets can elevate FGF21 in animals and humans.[18][37]

FGF21 can inhibit mTORC1 in the liver and stimulate adiponectin secretion from fatty tissues, thereby inhibiting aging-associated metabolic syndrome.[23] FGF21 protects against diabetic cardiomyopathy primarily by PGC-1α-induction of beta oxidation.[26] The anti-inflammatory effects if FGF21 may primarily be due to inhibition of NF-κB in macrophages.[26] In mice, FGF21 has been shown to protect against high fat diet-induced inflammation and islet hyperplasia in the pancreas,[38] a finding of possible clinical relevance.

A single-nucleotide polymorphism (SNP) of the FGF21 gene – the FGF21 rs838133 variant (frequency 44.7%) – has been identified as a genetic mechanism responsible for the sweet tooth behavioral phenotype, a trait associated with cravings for sweets and high sugar consumption, in both humans and mice.[12][13][14][34]

Preclinical studies[edit]

Mice lacking FGF21 fail to fully induce PGC-1α expression in response to a prolonged fast and have impaired gluconeogenesis and ketogenesis.[39]

FGF21 stimulates phosphorylation of fibroblast growth factor receptor substrate 2 and ERK1/2 in the liver. Acute FGF21 treatment induced hepatic expression of key regulators of gluconeogenesis, lipid metabolism, and ketogenesis including glucose-6-phosphatase, phosphoenol pyruvate carboxykinase, 3-hydroxybutyrate dehydrogenase type 1, and carnitine palmitoyltransferase 1α. In addition, injection of FGF21 was associated with decreased circulating insulin and free fatty acid levels. FGF21 treatment induced mRNA and protein expression of PGC-1α, but in mice PGC-1α expression was not necessary for the effect of FGF21 on glucose metabolism.[40]

In mice FGF21 is strongly induced in liver by prolonged fasting via PPAR-alpha and in turn induces the transcriptional coactivator PGC-1α and stimulates hepatic gluconeogenesis, fatty acid oxidation, and ketogenesis. In mice, FGF21 may be necessary for them to display the hibernation-like state of torpor,[15] also for eliciting and coordinating the adaptive response to fasting and starvation.[39] FGF21 expression is also induced in white adipose tissue by PPAR-gamma, which may indicate it also regulates metabolism in the fed state.[41] FGF21 is induced in both rodents and humans consuming a low protein diet.[42][43] FGF21 expression is also induced by diets with reduced levels of the essential dietary amino acids methionine,[44][45] isoleucine,[46] or threonine,[47] or with reduced levels of branched-chain amino acids.[48] Methionine restriction can increase circulating FGF21 between 5-fold and 10-fold in mice.[49]

In mice with acute ablation of thermogenic adipose tissues, FGF21-induced weight loss appears to be at least partially mediated by increased physical activity as well as by a centrally mediated increase in energy expenditure.[18]

Fructose ingestión also induced FGF21 in humans, where it causes a rise in FGF21 levels in serum;[50] likewise in mice, where serum FGF21 increases and induction of FGF21 in the liver can be confirmed.[51] A dramatic increase in circulating FGF21 in humans is induced by the consumption of alcohol.[52] Acutely, the rise in FGF21 in response to alcohol consumption inhibits further drinking.[53] Chronically, the rise in FGF21 expression in the liver may protect against liver damage.[16]

Activation of AMPK and SIRT1 by FGF21 in adipocytes enhanced mitochondrial oxidative capacity as demonstrated by increases in oxygen consumption, citrate synthase activity, and induction of key metabolic genes. The effects of FGF21 on mitochondrial function require serine/threonine kinase 11 (STK11/LKB1), which activates AMPK. Inhibition of AMPK, SIRT1, and PGC-1α activities attenuated the effects of FGF21 on oxygen consumption and gene expression, indicating that FGF21 regulates mitochondrial activity and enhances oxidative capacity through an LKB1-AMPK-SIRT1-PGC-1α-dependent mechanism in adipocytes, resulting in increased phosphorylation of AMPK, increased cellular NAD+ levels and activation of SIRT1 and deacetylation of SIRT1 targets PGC-1α and histone 3.[24]

References[edit]

  1. ^ Nishimura T, Nakatake Y, Konishi M, Itoh N (June 2000). "Identification of a novel FGF, FGF-21, preferentially expressed in the liver". Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression. 1492 (1): 203–6. doi:10.1016/S0167-4781(00)00067-1. PMID 10858549.
  2. ^ a b "Entrez Gene: FGF21 fibroblast growth factor 21".
  3. ^ "Fgf21 fibroblast growth factor 21 [Mus musculus (house mouse)] - Gene - NCBI". www.ncbi.nlm.nih.gov. Retrieved 2022-07-15.
  4. ^ a b c d e Kharitonenkov A, Shiyanova TL, Koester A, Ford AM, Micanovic R, Galbreath EJ, Sandusky GE, Hammond LJ, Moyers JS, Owens RA, Gromada J, Brozinick JT, Hawkins ED, Wroblewski VJ, Li DS, Mehrbod F, Jaskunas SR, Shanafelt AB (June 2005). "FGF-21 as a novel metabolic regulator". The Journal of Clinical Investigation. 115 (6): 1627–35. doi:10.1172/JCI23606. PMC 1088017. PMID 15902306.
  5. ^ Rader, Daniel J.; Maratos-Flier, Eleftheria; Nguyen, Amanda; Hom, Doug; Ferriere, Michael; Li, Yifang; Kompa, Jill; Martic, Miljen; Hinder, Markus; Basson, Craig T.; Yowe, David (2022-01-01). "LLF580, an FGF21 Analog, Reduces Triglycerides and Hepatic Fat in Obese Adults With Modest Hypertriglyceridemia". The Journal of Clinical Endocrinology and Metabolism. 107 (1): e57–e70. doi:10.1210/clinem/dgab624. ISSN 1945-7197. PMC 8914500. PMID 34431493.
  6. ^ Fisher, Ffolliott Martin; Maratos-Flier, Eleftheria (2016). "Understanding the Physiology of FGF21". Annual Review of Physiology. 78: 223–241. doi:10.1146/annurev-physiol-021115-105339. ISSN 1545-1585. PMID 26654352.
  7. ^ Zhang, Yi; Pan, Yingying; Xiong, Rongrong; Zheng, Jujia; Li, Qianyao; Zhang, Saisai; Li, Xiaokun; Pan, Xuebo; Yang, Shulin (2018-09-05). "FGF21 mediates the protective effect of fenofibrate against acetaminophen -induced hepatotoxicity via activating autophagy in mice". Biochemical and Biophysical Research Communications. 503 (2): 474–481. doi:10.1016/j.bbrc.2018.04.157. ISSN 1090-2104. PMID 29730296.
  8. ^ Zhang, Deqiang; Wang, Sujuan; Ospina, Erin; Shabandri, Omar; Lank, Daniel; Akakpo, Jephte Y.; Zhao, Zifeng; Yang, Meichan; Wu, Jun; Jaeschke, Hartmut; Saha, Pradip (2021). "Fructose Protects Against Acetaminophen-Induced Hepatotoxicity Mainly by Activating the Carbohydrate-Response Element-Binding Protein α-Fibroblast Growth Factor 21 Axis in Mice". Hepatology Communications. 5 (6): 992–1008. doi:10.1002/hep4.1683. ISSN 2471-254X. PMC 8183176. PMID 34141985.
  9. ^ von Holstein-Rathlou S, BonDurant LD, Peltekian L, Naber MC, Yin TC, Claflin KE, Urizar AI, Madsen AN, Ratner C, Holst B, Karstoft K, Vandenbeuch A, Anderson CB, Cassell MD, Thompson AP, Solomon TP, Rahmouni K, Kinnamon SC, Pieper AA, Gillum MP, Potthoff MJ (February 2016). "FGF21 Mediates Endocrine Control of Simple Sugar Intake and Sweet Taste Preference by the Liver". Cell Metabolism. 23 (2): 335–43. doi:10.1016/j.cmet.2015.12.003. PMC 4756759. PMID 26724858.
  10. ^ Talukdar S, Owen BM, Song P, Hernandez G, Zhang Y, Zhou Y, Scott WT, Paratala B, Turner T, Smith A, Bernardo B, Müller CP, Tang H, Mangelsdorf DJ, Goodwin B, Kliewer SA (February 2016). "FGF21 Regulates Sweet and Alcohol Preference". Cell Metabolism. 23 (2): 344–9. doi:10.1016/j.cmet.2015.12.008. PMC 4749404. PMID 26724861.
  11. ^ Søberg S, Sandholt CH, Jespersen NZ, Toft U, Madsen AL, von Holstein-Rathlou S, Grevengoed TJ, Christensen KB, Bredie WL, Potthoff MJ, Solomon TP, Scheele C, Linneberg A, Jørgensen T, Pedersen O, Hansen T, Gillum MP, Grarup N (May 2017). "FGF21 Is a Sugar-Induced Hormone Associated with Sweet Intake and Preference in Humans". Cell Metabolism. 25 (5): 1045–1053.e6. doi:10.1016/j.cmet.2017.04.009. PMID 28467924.
  12. ^ a b Frayling TM, Beaumont RN, Jones SE, Yaghootkar H, Tuke MA, Ruth KS, Casanova F, West B, Locke J, Sharp S, Ji Y, Thompson W, Harrison J, Etheridge AS, Gallins PJ, Jima D, Wright F, Zhou Y, Innocenti F, Lindgren CM, Grarup N, Murray A, Freathy RM, Weedon MN, Tyrrell J, Wood AR (April 2018). "A Common Allele in FGF21 Associated with Sugar Intake Is Associated with Body Shape, Lower Total Body-Fat Percentage, and Higher Blood Pressure". Cell Reports. 23 (2): 327–336. doi:10.1016/j.celrep.2018.03.070. PMC 5912948. PMID 29641994.
  13. ^ a b Greenhill C (July 2017). "Liver: FGF21 - the cause of having a 'sweet tooth'?". Nature Reviews. Endocrinology. 13 (7): 378. doi:10.1038/nrendo.2017.62. PMID 28497814. S2CID 3906326.
  14. ^ a b Geach T (March 2016). "Neuroendocrinology: FGF21 influences a 'sweet tooth' in mice". Nature Reviews. Endocrinology. 12 (3): 123. doi:10.1038/nrendo.2016.8. PMID 26822924. S2CID 8239766.
  15. ^ a b Murata, Yusuke; Konishi, Morichika; Itoh, Nobuyuki (2011). "FGF21 as an Endocrine Regulator in Lipid Metabolism: From Molecular Evolution to Physiology and Pathophysiology". Journal of Nutrition and Metabolism. 2011: 981315. doi:10.1155/2011/981315. ISSN 2090-0732. PMC 3038562. PMID 21331285.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  16. ^ a b BonDurant LD, Potthoff MJ (May 2018). "Fibroblast Growth Factor 21: A Versatile Regulator of Metabolic Homeostasis". Annu Rev Nutr. 38: 173–196. doi:10.1146/annurev-nutr-071816-064800. PMC 6964258. PMID 29727594.
  17. ^ Ogawa Y, Kurosu H, Yamamoto M, Nandi A, Rosenblatt KP, Goetz R, Eliseenkova AV, Mohammadi M, Kuro-o M (May 2007). "BetaKlotho is required for metabolic activity of fibroblast growth factor 21". Proceedings of the National Academy of Sciences of the United States of America. 104 (18): 7432–7. Bibcode:2007PNAS..104.7432O. doi:10.1073/pnas.0701600104. PMC 1855074. PMID 17452648.
  18. ^ a b c d Flippo KH, Potthoff MJ (2021). "Metabolic Messengers: FGF21". Nature Metabolism. 3 (3): 309–317. doi:10.1038/s42255-021-00354-2. PMC 8620721. PMID 33758421.
  19. ^ Markan, Kathleen R.; Naber, Meghan C.; Ameka, Magdalene K.; Anderegg, Maxwell D.; Mangelsdorf, David J.; Kliewer, Steven A.; Mohammadi, Moosa; Potthoff, Matthew J. (2014). "Circulating FGF21 is liver derived and enhances glucose uptake during refeeding and overfeeding". Diabetes. 63 (12): 4057–4063. doi:10.2337/db14-0595. ISSN 1939-327X. PMC 4238010. PMID 25008183.
  20. ^ Lin, Zhuofeng; Tian, Haishan; Lam, Karen S. L.; Lin, Shaoqiang; Hoo, Ruby C. L.; Konishi, Morichika; Itoh, Nobuyuki; Wang, Yu; Bornstein, Stefan R.; Xu, Aimin; Li, Xiaokun (2013-05-07). "Adiponectin mediates the metabolic effects of FGF21 on glucose homeostasis and insulin sensitivity in mice". Cell Metabolism. 17 (5): 779–789. doi:10.1016/j.cmet.2013.04.005. ISSN 1932-7420. PMID 23663741.
  21. ^ Coskun T, Bina HA, Schneider MA, Dunbar JD, Hu CC, Chen Y, Moller DE, Kharitonenkov A (December 2008). "Fibroblast growth factor 21 corrects obesity in mice". Endocrinology. 149 (12): 6018–27. doi:10.1210/en.2008-0816. PMID 18687777.
  22. ^ Douris, Nicholas; Stevanovic, Darko M.; Fisher, Ffolliott M.; Cisu, Theodore I.; Chee, Melissa J.; Nguyen, Ngoc L.; Zarebidaki, Eleen; Adams, Andrew C.; Kharitonenkov, Alexei; Flier, Jeffrey S.; Bartness, Timothy J. (2015). "Central Fibroblast Growth Factor 21 Browns White Fat via Sympathetic Action in Male Mice". Endocrinology. 156 (7): 2470–2481. doi:10.1210/en.2014-2001. ISSN 1945-7170. PMC 4475718. PMID 25924103.
  23. ^ a b Yan J, Nie Y, He B (2021). "The Roles and Pharmacological Effects of FGF21 in Preventing Aging-Associated Metabolic Diseases". Frontiers in Cardiovascular Medicine. 8: 655575. doi:10.3389/fcvm.2021.655575. PMC 8044345. PMID 33869312.
  24. ^ a b Chau MD, Gao J, Yang Q, Wu Z, Gromada J (July 2010). "Fibroblast growth factor 21 regulates energy metabolism by activating the AMPK-SIRT1-PGC-1alpha pathway". Proceedings of the National Academy of Sciences of the United States of America. 107 (28): 12553–8. Bibcode:2010PNAS..10712553C. doi:10.1073/pnas.1006962107. PMC 2906565. PMID 20616029.
  25. ^ Schoenberg KM, Giesy SL, Harvatine KJ, Waldron MR, Cheng C, Kharitonenkov A, Boisclair YR (December 2011). "Plasma FGF21 is elevated by the intense lipid mobilization of lactation". Endocrinology. 152 (12): 4652–61. doi:10.1210/en.2011-1425. PMID 21990311.
  26. ^ a b c Zhang Y, Liu D, Li H (2021). "The role of FGF21 in the pathogenesis of cardiovascular disease". Chinese Medical Journal. 134 (24): 2931–2943. doi:10.1097/CM9.0000000000001890. PMC 8710326. PMID 34939977.
  27. ^ Vilà-Brau A, De Sousa-Coelho AL, Mayordomo C, Haro D, Marrero PF (June 2011). "Human HMGCS2 regulates mitochondrial fatty acid oxidation and FGF21 expression in HepG2 cell line". The Journal of Biological Chemistry. 286 (23): 20423–30. doi:10.1074/jbc.M111.235044. PMC 3121469. PMID 21502324.
  28. ^ Shimazu T, Hirschey MD, Hua L, Dittenhafer-Reed KE, Schwer B, Lombard DB, Li Y, Bunkenborg J, Alt FW, Denu JM, Jacobson MP, Verdin E (December 2010). "SIRT3 deacetylates mitochondrial 3-hydroxy-3-methylglutaryl CoA synthase 2 and regulates ketone body production". Cell Metabolism. 12 (6): 654–61. doi:10.1016/j.cmet.2010.11.003. PMC 3310379. PMID 21109197.
  29. ^ Markan KR, Naber MC, Ameka MK, Anderegg MD, Mangelsdorf DJ, Kliewer SA, Mohammadi M, Potthoff MJ (December 2014). "Circulating FGF21 is liver derived and enhances glucose uptake during refeeding and overfeeding". Diabetes. 63 (12): 4057–63. doi:10.2337/db14-0595. PMC 4238010. PMID 25008183.
  30. ^ Grabacka M, Pierzchalska M, Dean M, Reiss K (2016). "Regulation of Ketone Body Metabolism and the Role of PPARα". International Journal of Molecular Sciences. 17 (12): E2093. doi:10.3390/ijms17122093. PMC 5187893. PMID 27983603.
  31. ^ Uebanso T, Taketani Y, Yamamoto H, Amo K, Tanaka S, Arai H, Takei Y, Masuda M, Yamanaka-Okumura H, Takeda E (July 2012). "Liver X receptor negatively regulates fibroblast growth factor 21 in the fatty liver induced by cholesterol-enriched diet". The Journal of Nutritional Biochemistry. 23 (7): 785–90. doi:10.1016/j.jnutbio.2011.03.023. PMID 21889884.
  32. ^ Domouzoglou, Eleni M.; Fisher, Ffolliott Martin; Astapova, Inna; Fox, Elliott C.; Kharitonenkov, Alexei; Flier, Jeffrey S.; Hollenberg, Anthony N.; Maratos-Flier, Eleftheria (2014). "Fibroblast growth factor 21 and thyroid hormone show mutual regulatory dependency but have independent actions in vivo". Endocrinology. 155 (5): 2031–2040. doi:10.1210/en.2013-1902. ISSN 1945-7170. PMC 3990851. PMID 24564398.
  33. ^ Cheng X, Zhu B, Jiang F, Fan H (2011). "Serum FGF-21 levels in type 2 diabetic patients". Endocrine Research. 36 (4): 142–8. doi:10.3109/07435800.2011.558550. PMID 21973233. S2CID 24454698.
  34. ^ a b Xie T, Leung PS (2017). "Fibroblast growth factor 21: a regulator of metabolic disease and health span". American Journal of Physiology. Endocrinology and Metabolism. 313 (3): E292–E302. doi:10.1152/ajpendo.00101.2017. PMC 5625087. PMID 28559437.
  35. ^ Yan H, Xia M, Chang X, Xu Q, Bian H, Zeng M, Rao S, Yao X, Tu Y, Jia W, Gao X (2011). "Circulating fibroblast growth factor 21 levels are closely associated with hepatic fat content: a cross-sectional study". PLOS ONE. 6 (9): e24895. Bibcode:2011PLoSO...624895Y. doi:10.1371/journal.pone.0024895. PMC 3174975. PMID 21949781.
  36. ^ Kralisch S, Fasshauer M (July 2011). "Fibroblast growth factor 21: effects on carbohydrate and lipid metabolism in health and disease". Current Opinion in Clinical Nutrition and Metabolic Care. 14 (4): 354–9. doi:10.1097/MCO.0b013e328346a326. PMID 21505329. S2CID 45095074.
  37. ^ Hill, Cristal M.; Berthoud, Hans-Rudolf; Münzberg, Heike; Morrison, Christopher D. (2018). "Homeostatic sensing of dietary protein restriction: A case for FGF21". Frontiers in Neuroendocrinology. 51: 125–131. doi:10.1016/j.yfrne.2018.06.002. ISSN 1095-6808. PMC 6175661. PMID 29890191.
  38. ^ Singhal, Garima; Fisher, Ffolliott Martin; Chee, Melissa J.; Tan, Tze Guan; El Ouaamari, Abdelfattah; Adams, Andrew C.; Najarian, Robert; Kulkarni, Rohit N.; Benoist, Christophe; Flier, Jeffrey S.; Maratos-Flier, Eleftheria (2016). "Fibroblast Growth Factor 21 (FGF21) Protects against High Fat Diet Induced Inflammation and Islet Hyperplasia in Pancreas". PloS One. 11 (2): e0148252. doi:10.1371/journal.pone.0148252. ISSN 1932-6203. PMC 4752212. PMID 26872145.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  39. ^ a b Potthoff MJ, Inagaki T, Satapati S, Ding X, He T, Goetz R, Mohammadi M, Finck BN, Mangelsdorf DJ, Kliewer SA, Burgess SC (June 2009). "FGF21 induces PGC-1alpha and regulates carbohydrate and fatty acid metabolism during the adaptive starvation response". Proceedings of the National Academy of Sciences of the United States of America. 106 (26): 10853–8. Bibcode:2009PNAS..10610853P. doi:10.1073/pnas.0904187106. PMC 2705613. PMID 19541642.
  40. ^ Fisher FM, Estall JL, Adams AC, Antonellis PJ, Bina HA, Flier JS, Kharitonenkov A, Spiegelman BM, Maratos-Flier E (August 2011). "Integrated regulation of hepatic metabolism by fibroblast growth factor 21 (FGF21) in vivo". Endocrinology. 152 (8): 2996–3004. doi:10.1210/en.2011-0281. PMC 3138239. PMID 21712364.
  41. ^ Kliewer SA, Mangelsdorf DJ (January 2010). "Fibroblast growth factor 21: from pharmacology to physiology". The American Journal of Clinical Nutrition. 91 (1): 254S–257S. doi:10.3945/ajcn.2009.28449B. PMC 2793111. PMID 19906798.
  42. ^ Laeger T, Henagan TM, Albarado DC, Redman LM, Bray GA, Noland RC, Münzberg H, Hutson SM, Gettys TW, Schwartz MW, Morrison CD (September 2014). "FGF21 is an endocrine signal of protein restriction". The Journal of Clinical Investigation. 124 (9): 3913–22. doi:10.1172/JCI74915. PMC 4153701. PMID 25133427.
  43. ^ Fontana L, Cummings NE, Arriola Apelo SI, Neuman JC, Kasza I, Schmidt BA, Cava E, Spelta F, Tosti V, Syed FA, Baar EL, Veronese N, Cottrell SE, Fenske RJ, Bertozzi B, Brar HK, Pietka T, Bullock AD, Figenshau RS, Andriole GL, Merrins MJ, Alexander CM, Kimple ME, Lamming DW (July 2016). "Decreased Consumption of Branched-Chain Amino Acids Improves Metabolic Health". Cell Reports. 16 (2): 520–530. doi:10.1016/j.celrep.2016.05.092. PMC 4947548. PMID 27346343.
  44. ^ Lees EK, Król E, Grant L, Shearer K, Wyse C, Moncur E, Bykowska AS, Mody N, Gettys TW, Delibegovic M (October 2014). "Methionine restriction restores a younger metabolic phenotype in adult mice with alterations in fibroblast growth factor 21". Aging Cell. 13 (5): 817–27. doi:10.1111/acel.12238. PMC 4331744. PMID 24935677.
  45. ^ Yu D, Yang SE, Miller BR, Wisinski JA, Sherman DS, Brinkman JA, Tomasiewicz JL, Cummings NE, Kimple ME, Cryns VL, Lamming DW (January 2018). "Short-term methionine deprivation improves metabolic health via sexually dimorphic, mTORC1-independent mechanisms". FASEB Journal. 32 (6): 3471–3482. doi:10.1096/fj.201701211R. PMC 5956241. PMID 29401631.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  46. ^ Yu, Deyang; Richardson, Nicole E.; Green, Cara L.; Spicer, Alexandra B.; Murphy, Michaela E.; Flores, Victoria; Jang, Cholsoon; Kasza, Ildiko; Nikodemova, Maria; Wakai, Matthew H.; Tomasiewicz, Jay L. (2021-04-16). "The adverse metabolic effects of branched-chain amino acids are mediated by isoleucine and valine". Cell Metabolism. 33 (5): 905–922.e6. doi:10.1016/j.cmet.2021.03.025. ISSN 1932-7420. PMC 8102360. PMID 33887198.
  47. ^ Yap, Yann W.; Rusu, Patricia M.; Chan, Andrea Y.; Fam, Barbara C.; Jungmann, Andreas; Solon-Biet, Samantha M.; Barlow, Christopher K.; Creek, Darren J.; Huang, Cheng; Schittenhelm, Ralf B.; Morgan, Bruce (2020-06-09). "Restriction of essential amino acids dictates the systemic metabolic response to dietary protein dilution". Nature Communications. 11 (1): 2894. Bibcode:2020NatCo..11.2894Y. doi:10.1038/s41467-020-16568-z. ISSN 2041-1723. PMC 7283339. PMID 32518324.
  48. ^ Cummings NE, Williams EM, Kasza I, Konon EN, Schaid MD, Schmidt BA, Poudel C, Sherman DS, Yu D, Arriola Apelo SI, Cottrell SE, Geiger G, Barnes ME, Wisinski JA, Fenske RJ, Matkowskyj KA, Kimple ME, Alexander CM, Merrins MJ, Lamming DW (February 2018). "Restoration of metabolic health by decreased consumption of branched-chain amino acids". The Journal of Physiology. 596 (4): 623–645. doi:10.1113/JP275075. PMC 5813603. PMID 29266268.
  49. ^ Fang H, Stone KP, Forney LA, Wanders D, Gettys TW (2021). "Nutritional Regulation of Hepatic FGF21 by Dietary Restriction of Methionine". Frontiers in Endocrinology. 12: 773975. doi:10.3389/fendo.2021.773975. PMC 8669746. PMID 34917032.
  50. ^ Dushay, Jody R.; Toschi, Elena; Mitten, Emilie K.; Fisher, Ffolliott M.; Herman, Mark A.; Maratos-Flier, Eleftheria (2015). "Fructose ingestion acutely stimulates circulating FGF21 levels in humans". Molecular Metabolism. 4 (1): 51–57. doi:10.1016/j.molmet.2014.09.008. ISSN 2212-8778. PMC 4314524. PMID 25685689.
  51. ^ Fisher, Ffolliott M.; Kim, MiSung; Doridot, Ludivine; Cunniff, Jeremy C.; Parker, Thomas S.; Levine, Daniel M.; Hellerstein, Marc K.; Hudgins, Lisa C.; Maratos-Flier, Eleftheria; Herman, Mark A. (2017). "A critical role for ChREBP-mediated FGF21 secretion in hepatic fructose metabolism". Molecular Metabolism. 6 (1): 14–21. doi:10.1016/j.molmet.2016.11.008. ISSN 2212-8778. PMC 5220398. PMID 28123933.
  52. ^ Desai, Bhavna N.; Singhal, Garima; Watanabe, Mikiko; Stevanovic, Darko; Lundasen, Thomas; Fisher, Ffolliott M.; Mather, Marie L.; Vardeh, Hilde G.; Douris, Nicholas; Adams, Andrew C.; Nasser, Imad A. (2017). "Fibroblast growth factor 21 (FGF21) is robustly induced by ethanol and has a protective role in ethanol associated liver injury". Molecular Metabolism. 6 (11): 1395–1406. doi:10.1016/j.molmet.2017.08.004. ISSN 2212-8778. PMC 5681240. PMID 29107287.
  53. ^ Flippo, Kyle H.; Trammell, Samuel A. J.; Gillum, Matthew P.; Aklan, Iltan; Perez, Misty B.; Yavuz, Yavuz; Smith, Nicholas K.; Jensen-Cody, Sharon O.; Zhou, Bolu; Claflin, Kristin E.; Beierschmitt, Amy (2022-02-01). "FGF21 suppresses alcohol consumption through an amygdalo-striatal circuit". Cell Metabolism. 34 (2): 317–328.e6. doi:10.1016/j.cmet.2021.12.024. ISSN 1932-7420. PMC 9093612. PMID 35108517.