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Jang-Hyun Youn, PhD

Title(s)Associate Professor of Physiology & Neuroscience
AddressCSC 214, 2250 Alcazar Steet
Health Sciences Campus
Los Angeles CA 90033
Phone+1 323 442 3260
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    1. Potassium Homeostasis: The Knowns, the Unknowns, and the Health Benefits. Physiology (Bethesda). 2017 03; 32(2):100-111. McDonough AA, Youn JH. PMID: 28202621.
      View in: PubMed   Mentions: 8     Fields:    Translation:HumansAnimals
    2. Circulating free fatty acids inhibit food intake in an oleate-specific manner in rats. Physiol Behav. 2016 12 01; 167:194-201. Oh YT, Oh HH, Nguyen AK, Choi CS, Youn JH. PMID: 27654062.
      View in: PubMed   Mentions: 1     Fields:    Translation:Animals
    3. ?-Defensin RTD-1 improves insulin action and normalizes plasma glucose and FFA levels in diet-induced obese rats. Am J Physiol Endocrinol Metab. 2015 Jul 15; 309(2):E154-60. Oh YT, Tran D, Buchanan TA, Selsted ME, Youn JH. PMID: 25991648.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    4. Fat sensing and metabolic syndrome. Rev Endocr Metab Disord. 2014 Dec; 15(4):263-75. Youn JH. PMID: 25344446.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    5. Licochalcone A induces apoptosis through endoplasmic reticulum stress via a phospholipase C?1-, Ca(2+)-, and reactive oxygen species-dependent pathway in HepG2 human hepatocellular carcinoma cells. Apoptosis. 2014 Apr; 19(4):682-97. Choi AY, Choi JH, Hwang KY, Jeong YJ, Choe W, Yoon KS, Ha J, Kim SS, Youn JH, Yeo EJ, Kang I. PMID: 24337903.
      View in: PubMed   Mentions: 18     Fields:    Translation:HumansCells
    6. Increasing plasma [K+] by intravenous potassium infusion reduces NCC phosphorylation and drives kaliuresis and natriuresis. Am J Physiol Renal Physiol. 2014 May 01; 306(9):F1059-68. Rengarajan S, Lee DH, Oh YT, Delpire E, Youn JH, McDonough AA. PMID: 24598799.
      View in: PubMed   Mentions: 44     Fields:    Translation:AnimalsCells
    7. Regulation of hypothalamic-pituitary-adrenal axis by circulating free fatty acids in male Wistar rats: role of individual free fatty acids. Endocrinology. 2014 Mar; 155(3):923-31. Oh YT, Kim J, Kang I, Youn JH. PMID: 24424035.
      View in: PubMed   Mentions: 12     Fields:    Translation:Animals
    8. Need to quickly excrete K(+)? Turn off NCC. Kidney Int. 2013 May; 83(5):779-82. McDonough AA, Youn JH. PMID: 23633048.
      View in: PubMed   Mentions: 8     Fields:    Translation:Animals
    9. Gut sensing of potassium intake and its role in potassium homeostasis. Semin Nephrol. 2013 May; 33(3):248-56. Youn JH. PMID: 23953802.
      View in: PubMed   Mentions: 9     Fields:    Translation:HumansAnimals
    10. Role of pituitary in K+ homeostasis: impaired renal responses to altered K+ intake in hypophysectomized rats. Am J Physiol Regul Integr Comp Physiol. 2013 Jun 15; 304(12):R1166-74. Oh YT, Kim J, Youn JH. PMID: 23594607.
      View in: PubMed   Mentions: 5     Fields:    Translation:AnimalsCells
    11. A Fall in plasma free fatty acid (FFA) level activates the hypothalamic-pituitary-adrenal axis independent of plasma glucose: evidence for brain sensing of circulating FFA. Endocrinology. 2012 Aug; 153(8):3587-92. Oh YT, Oh KS, Kang I, Youn JH. PMID: 22669895.
      View in: PubMed   Mentions: 8     Fields:    Translation:Animals
    12. Gut sensing of dietary K? intake increases renal K?excretion. Am J Physiol Regul Integr Comp Physiol. 2011 Aug; 301(2):R421-9. Oh KS, Oh YT, Kim SW, Kita T, Kang I, Youn JH. PMID: 21543632.
      View in: PubMed   Mentions: 13     Fields:    Translation:Animals
    13. Continuous 24-h nicotinic acid infusion in rats causes FFA rebound and insulin resistance by altering gene expression and basal lipolysis in adipose tissue. Am J Physiol Endocrinol Metab. 2011 Jun; 300(6):E1012-21. Oh YT, Oh KS, Choi YM, Jokiaho A, Donovan C, Choi S, Kang I, Youn JH. PMID: 21386057.
      View in: PubMed   Mentions: 13     Fields:    Translation:AnimalsCells
    14. eNOS plays a major role in adiponectin synthesis in adipocytes. Am J Physiol Endocrinol Metab. 2010 Apr; 298(4):E846-53. Koh EH, Kim M, Ranjan KC, Kim HS, Park HS, Oh KS, Park IS, Lee WJ, Kim MS, Park JY, Youn JH, Lee KU. PMID: 20124507.
      View in: PubMed   Mentions: 14     Fields:    Translation:AnimalsCells
    15. Peroxisome proliferator-activated receptor-gamma coactivator 1-alpha overexpression prevents endothelial apoptosis by increasing ATP/ADP translocase activity. Arterioscler Thromb Vasc Biol. 2010 Feb; 30(2):290-7. Won JC, Park JY, Kim YM, Koh EH, Seol S, Jeon BH, Han J, Kim JR, Park TS, Choi CS, Lee WJ, Kim MS, Lee IK, Youn JH, Lee KU. PMID: 19965780.
      View in: PubMed   Mentions: 23     Fields:    Translation:HumansAnimalsCells
    16. Narrative review: evolving concepts in potassium homeostasis and hypokalemia. Ann Intern Med. 2009 May 05; 150(9):619-25. Greenlee M, Wingo CS, McDonough AA, Youn JH, Kone BC. PMID: 19414841.
      View in: PubMed   Mentions: 15     Fields:    Translation:HumansAnimals
    17. Recent advances in understanding integrative control of potassium homeostasis. Annu Rev Physiol. 2009; 71:381-401. Youn JH, McDonough AA. PMID: 18759636.
      View in: PubMed   Mentions: 31     Fields:    Translation:HumansAnimals
    18. AMPK activation with AICAR provokes an acute fall in plasma [K+]. Am J Physiol Cell Physiol. 2008 Jan; 294(1):C126-35. Zheng D, Perianayagam A, Lee DH, Brannan MD, Yang LE, Tellalian D, Chen P, Lemieux K, Marette A, Youn JH, McDonough AA. PMID: 18003746.
      View in: PubMed   Mentions: 10     Fields:    Translation:AnimalsCells
    19. Essential role of mitochondrial function in adiponectin synthesis in adipocytes. Diabetes. 2007 Dec; 56(12):2973-81. Koh EH, Park JY, Park HS, Jeon MJ, Ryu JW, Kim M, Kim SY, Kim MS, Kim SW, Park IS, Youn JH, Lee KU. PMID: 17827403.
      View in: PubMed   Mentions: 68     Fields:    Translation:AnimalsCells
    20. Evidence for gut factor in K+ homeostasis. Am J Physiol Renal Physiol. 2007 Aug; 293(2):F541-7. Lee FN, Oh G, McDonough AA, Youn JH. PMID: 17522262.
      View in: PubMed   Mentions: 24     Fields:    Translation:Animals
    21. Insulin regulation of skeletal muscle PDK4 mRNA expression is impaired in acute insulin-resistant states. Diabetes. 2006 Aug; 55(8):2311-7. Kim YI, Lee FN, Choi WS, Lee S, Youn JH. PMID: 16873695.
      View in: PubMed   Mentions: 40     Fields:    Translation:AnimalsCells
    22. Modest dietary K+ restriction provokes insulin resistance of cellular K+ uptake and phosphorylation of renal outer medulla K+ channel without fall in plasma K+ concentration. Am J Physiol Cell Physiol. 2006 May; 290(5):C1355-63. Chen P, Guzman JP, Leong PK, Yang LE, Perianayagam A, Babilonia E, Ho JS, Youn JH, Wang WH, McDonough AA. PMID: 16354756.
      View in: PubMed   Mentions: 12     Fields:    Translation:AnimalsCells
    23. Alpha-lipoic acid prevents endothelial dysfunction in obese rats via activation of AMP-activated protein kinase. Arterioscler Thromb Vasc Biol. 2005 Dec; 25(12):2488-94. Lee WJ, Lee IK, Kim HS, Kim YM, Koh EH, Won JC, Han SM, Kim MS, Jo I, Oh GT, Park IS, Youn JH, Park SW, Lee KU, Park JY. PMID: 16224049.
      View in: PubMed   Mentions: 33     Fields:    Translation:HumansAnimalsCells
    24. Role of muscle in regulating extracellular [K+]. Semin Nephrol. 2005 Sep; 25(5):335-42. McDonough AA, Youn JH. PMID: 16139689.
      View in: PubMed   Mentions: 9     Fields:    Translation:HumansAnimalsCells
    25. alpha-Lipoic acid prevents diabetes mellitus in diabetes-prone obese rats. Biochem Biophys Res Commun. 2005 Jan 07; 326(1):197-202. Song KH, Lee WJ, Koh JM, Kim HS, Youn JY, Park HS, Koh EH, Kim MS, Youn JH, Lee KU, Park JY. PMID: 15567171.
      View in: PubMed   Mentions: 17     Fields:    Translation:Animals
    26. Dexamethasone treatment causes resistance to insulin-stimulated cellular potassium uptake in the rat. Am J Physiol Cell Physiol. 2004 Nov; 287(5):C1229-37. Rhee MS, Perianayagam A, Chen P, Youn JH, McDonough AA. PMID: 15213056.
      View in: PubMed   Mentions: 6     Fields:    Translation:Animals
    27. Anti-obesity effects of alpha-lipoic acid mediated by suppression of hypothalamic AMP-activated protein kinase. Nat Med. 2004 Jul; 10(7):727-33. Kim MS, Park JY, Namkoong C, Jang PG, Ryu JW, Song HS, Yun JY, Namgoong IS, Ha J, Park IS, Lee IK, Viollet B, Youn JH, Lee HK, Lee KU. PMID: 15195087.
      View in: PubMed   Mentions: 104     Fields:    Translation:AnimalsCells
    28. Insulin suppresses PDK-4 expression in skeletal muscle independently of plasma FFA. Am J Physiol Endocrinol Metab. 2004 Jul; 287(1):E69-74. Lee FN, Zhang L, Zheng D, Choi WS, Youn JH. PMID: 15026305.
      View in: PubMed   Mentions: 12     Fields:    Translation:Animals
    29. Peroxisome proliferator-activated receptor (PPAR)-alpha activation prevents diabetes in OLETF rats: comparison with PPAR-gamma activation. Diabetes. 2003 Sep; 52(9):2331-7. Koh EH, Kim MS, Park JY, Kim HS, Youn JY, Park HS, Youn JH, Lee KU. PMID: 12941773.
      View in: PubMed   Mentions: 34     Fields:    Translation:Animals
    30. Lactate induces insulin resistance in skeletal muscle by suppressing glycolysis and impairing insulin signaling. Am J Physiol Endocrinol Metab. 2002 Aug; 283(2):E233-40. Choi CS, Kim YB, Lee FN, Zabolotny JM, Kahn BB, Youn JH. PMID: 12110527.
      View in: PubMed   Mentions: 26     Fields:    Translation:AnimalsCells
    31. Skeletal muscle regulates extracellular potassium. Am J Physiol Renal Physiol. 2002 Jun; 282(6):F967-74. McDonough AA, Thompson CB, Youn JH. PMID: 11997312.
      View in: PubMed   Mentions: 18     Fields:    Translation:HumansAnimalsCells
    32. Independent regulation of in vivo insulin action on glucose versus K(+) uptake by dietary fat and K(+) content. Diabetes. 2002 Apr; 51(4):915-20. Choi CS, Lee FN, McDonough AA, Youn JH. PMID: 11916907.
      View in: PubMed   Mentions: 9     Fields:    Translation:Animals
    33. Free fatty acids induce peripheral insulin resistance without increasing muscle hexosamine pathway product levels in rats. Diabetes. 2001 Feb; 50(2):418-24. Choi CS, Lee FN, Youn JH. PMID: 11272156.
      View in: PubMed   Mentions: 4     Fields:    Translation:Animals
    34. Short-term K(+) deprivation provokes insulin resistance of cellular K(+) uptake revealed with the K(+) clamp. Am J Physiol Renal Physiol. 2001 Jan; 280(1):F95-F102. Choi CS, Thompson CB, Leong PK, McDonough AA, Youn JH. PMID: 11133519.
      View in: PubMed   Mentions: 11     Fields:    Translation:Animals
    35. Effects of high-fat diet and exercise training on intracellular glucose metabolism in rats. Am J Physiol Endocrinol Metab. 2000 Jun; 278(6):E977-84. Kim CH, Youn JH, Park JY, Hong SK, Park KS, Park SW, Suh KI, Lee KU. PMID: 10826998.
      View in: PubMed   Mentions: 15     Fields:    Translation:Animals
    36. Acute effect of growth hormone to induce peripheral insulin resistance is independent of FFA and insulin levels in rats. Am J Physiol. 1999 10; 277(4):E742-9. Kim JK, Choi CS, Youn JH. PMID: 10516135.
      View in: PubMed   Mentions: 2     Fields:    Translation:HumansAnimalsCells
    37. Temporal responses of oxidative vs. glycolytic skeletal muscles to K+ deprivation: Na+ pumps and cell cations. Am J Physiol. 1999 06; 276(6):C1411-9. Thompson CB, Choi C, Youn JH, McDonough AA. PMID: 10362605.
      View in: PubMed   Mentions: 4     Fields:    Translation:AnimalsCells
    38. Reduced glucose clearance as the major determinant of postabsorptive hyperglycemia in diabetic rats. Am J Physiol. 1998 02; 274(2):E257-64. Wi JK, Kim JK, Youn JH. PMID: 9486156.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    39. Prolonged suppression of glucose metabolism causes insulin resistance in rat skeletal muscle. Am J Physiol. 1997 Feb; 272(2 Pt 1):E288-96. Kim JK, Youn JH. PMID: 9124337.
      View in: PubMed   Mentions: 3     Fields:    Translation:AnimalsCells
    40. The development of insulin resistance with high fat feeding in rats does not involve either decreased insulin receptor tyrosine kinase activity or membrane glycoprotein PC-1. Biochem Mol Med. 1996 Dec; 59(2):174-81. Ozel B, Youngren JF, Kim JK, Goldfine ID, Sung CK, Youn JH. PMID: 8986641.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    41. Extracellular glucose distribution is not altered by insulin: analysis of plasma and interstitial L-glucose kinetics. Am J Physiol. 1996 Nov; 271(5 Pt 1):E855-64. Steil GM, Richey J, Kim JK, Wi JK, Rebrin K, Bergman RN, Youn JH. PMID: 8944672.
      View in: PubMed   Mentions: 4     Fields:    Translation:AnimalsCells
    42. Metabolic impairment precedes insulin resistance in skeletal muscle during high-fat feeding in rats. Diabetes. 1996 May; 45(5):651-8. Kim JK, Wi JK, Youn JH. PMID: 8621018.
      View in: PubMed   Mentions: 14     Fields:    Translation:AnimalsCells
    43. Mechanisms of postabsorptive hyperglycemia in streptozotocin diabetic rats. Am J Physiol. 1996 May; 270(5 Pt 1):E752-8. Wi JK, Kim JK, Youn JH. PMID: 8967462.
      View in: PubMed   Mentions: 1     Fields:    Translation:AnimalsCells
    44. Plasma free fatty acids decrease insulin-stimulated skeletal muscle glucose uptake by suppressing glycolysis in conscious rats. Diabetes. 1996 Apr; 45(4):446-53. Kim JK, Wi JK, Youn JH. PMID: 8603766.
      View in: PubMed   Mentions: 17     Fields:    Translation:AnimalsCells
    45. Assessment of extracellular glucose distribution and glucose transport activity in conscious rats. Am J Physiol. 1995 Apr; 268(4 Pt 1):E712-21. Youn JH, Kim JK, Steil GM. PMID: 7733271.
      View in: PubMed   Mentions: 7     Fields:    Translation:AnimalsCells
    46. Interactions between effects of W-7, insulin, and hypoxia on glucose transport in skeletal muscle. Am J Physiol. 1994 Oct; 267(4 Pt 2):R888-94. Youn JH, Gulve EA, Henriksen EJ, Holloszy JO. PMID: 7943429.
      View in: PubMed   Mentions: 9     Fields:    Translation:Animals
    47. Time courses of changes in hepatic and skeletal muscle insulin action and GLUT4 protein in skeletal muscle after STZ injection. Diabetes. 1994 Apr; 43(4):564-71. Youn JH, Kim JK, Buchanan TA. PMID: 8138062.
      View in: PubMed   Mentions: 16     Fields:    Translation:AnimalsCells
    48. Fasting does not impair insulin-stimulated glucose uptake but alters intracellular glucose metabolism in conscious rats. Diabetes. 1993 May; 42(5):757-63. Youn JH, Buchanan TA. PMID: 8482433.
      View in: PubMed   Mentions: 31     Fields:    Translation:AnimalsCells
    49. Glucose transporters and glucose transport in skeletal muscles of 1- to 25-mo-old rats. Am J Physiol. 1993 Mar; 264(3 Pt 1):E319-27. Gulve EA, Henriksen EJ, Rodnick KJ, Youn JH, Holloszy JO. PMID: 8460679.
      View in: PubMed   Mentions: 4     Fields:    Translation:Animals
    50. Effects of alkaline pH on the stimulation of glucose transport in rat skeletal muscle. Biochim Biophys Acta. 1993 Feb 09; 1145(2):199-204. Ren JM, Youn JH, Gulve EA, Henriksen EJ, Holloszy JO. PMID: 8431452.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    51. Glucose transporters and maximal transport are increased in endurance-trained rat soleus. J Appl Physiol (1985). 1992 Aug; 73(2):486-92. Slentz CA, Gulve EA, Rodnick KJ, Henriksen EJ, Youn JH, Holloszy JO. PMID: 1399970.
      View in: PubMed   Mentions: 10     Fields:    Translation:Animals
    52. Enhanced glucose tolerance in spontaneously hypertensive rats. Pancreatic beta-cell hyperfunction with normal insulin sensitivity. Diabetes. 1992 Jul; 41(7):872-8. Buchanan TA, Youn JH, Campese VM, Sipos GF. PMID: 1612202.
      View in: PubMed   Mentions: 7     Fields:    Translation:Animals
    53. Conversion of oral glucose to lactate in dogs. Primary site and relative contribution to blood lactate. Diabetes. 1991 Jun; 40(6):738-47. Youn JH, Bergman RN. PMID: 2040389.
      View in: PubMed   Mentions: 3     Fields:    Translation:Animals
    54. Calcium stimulates glucose transport in skeletal muscle by a pathway independent of contraction. Am J Physiol. 1991 Mar; 260(3 Pt 1):C555-61. Youn JH, Gulve EA, Holloszy JO. PMID: 2003578.
      View in: PubMed   Mentions: 27     Fields:    Translation:AnimalsCells
    55. Prolonged incubation of skeletal muscle increases system A amino acid transport. Am J Physiol. 1991 Jan; 260(1 Pt 1):C88-95. Gulve EA, Cartee GD, Youn JH, Holloszy JO. PMID: 1987782.
      View in: PubMed   Mentions: 2     Fields:    Translation:Animals
    56. Enhancement of hepatic glycogen by gluconeogenic precursors: substrate flux or metabolic control? Am J Physiol. 1990 Jun; 258(6 Pt 1):E899-906. Youn JH, Bergman RN. PMID: 2193531.
      View in: PubMed   Mentions: 6     Fields:    Translation:HumansAnimalsCells
    57. Assessment of insulin sensitivity in vivo: a critical review. Diabetes Metab Rev. 1989 Aug; 5(5):411-29. Bergman RN, Hope ID, Yang YJ, Watanabe RM, Meador MA, Youn JH, Ader M. PMID: 2667927.
      View in: PubMed   Mentions: 21     Fields:    Translation:HumansAnimals
    58. Glucose phosphorylation is not rate limiting for accumulation of glycogen from glucose in perfused livers from fasted rats. J Biol Chem. 1989 Jan 05; 264(1):168-72. Youn JH, Ader M, Bergman RN. PMID: 2642472.
      View in: PubMed   Mentions: 1     Fields:    Translation:Animals
    59. Response to deep hypoglycemia does not involve glucoreceptors in carotid perfused tissue. Am J Physiol. 1988 Nov; 255(5 Pt 1):E680-7. Cane P, Haun CK, Evered J, Youn JH, Bergman RN. PMID: 2847539.
      View in: PubMed   Mentions: 4     Fields:    Translation:Animals
    60. Regulation of glycogen synthase in muscle and adipose tissue during fasting and refeeding. Am J Physiol. 1988 Jun; 254(6 Pt 1):E720-5. Antwi D, Youn JH, Shargill NS, Lesikar DD, Kaslow HR. PMID: 3132046.
      View in: PubMed   Mentions: 3     Fields:    Translation:AnimalsCells
    61. Modified protocols improve insulin sensitivity estimation using the minimal model. Am J Physiol. 1987 Dec; 253(6 Pt 1):E595-602. Yang YJ, Youn JH, Bergman RN. PMID: 2892414.
      View in: PubMed   Mentions: 36     Fields:    Translation:Animals
    62. Patterns of glycogen turnover in liver characterized by computer modeling. Am J Physiol. 1987 Oct; 253(4 Pt 1):E360-9. Youn JH, Bergman RN. PMID: 3661699.
      View in: PubMed   Mentions: 3     Fields:    
    63. Fructose effect to suppress hepatic glycogen degradation. J Biol Chem. 1987 Aug 25; 262(24):11470-7. Youn JH, Kaslow HR, Bergman RN. PMID: 3114246.
      View in: PubMed   Mentions: 8     Fields:    Translation:AnimalsCells
    64. Synergism of glucose and fructose in net glycogen synthesis in perfused rat livers. J Biol Chem. 1986 Dec 05; 261(34):15960-9. Youn JH, Youn MS, Bergman RN. PMID: 3023336.
      View in: PubMed   Mentions: 12     Fields:    Translation:Animals
    65. Computed insulin profiles for normalization of glycemia in diabetic patients. Bull Math Biol. 1983; 45(5):739-48. Youn JH, Kim HC, Lee HK, Min BG. PMID: 6360264.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
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