Insulin resistance and altered systemic glucose metabolism in mice lacking Nur77.

PubWeight™: 1.46‹?› | Rank: Top 5%

🔗 View Article (PMC 2780886)

Published in Diabetes on September 09, 2009

Authors

Lily C Chao1, Kevin Wroblewski, Zidong Zhang, Liming Pei, Laurent Vergnes, Olga R Ilkayeva, Shi Ying Ding, Karen Reue, Matthew J Watt, Christopher B Newgard, Paul F Pilch, Andrea L Hevener, Peter Tontonoz

Author Affiliations

1: Howard Hughes Medical Institute, Department of Pathology and Laboratory Medicine, University of California-Los Angeles, Los Angeles, California, USA.

Articles citing this

Hormonal regulation of hepatic glucose production in health and disease. Cell Metab (2011) 2.12

The orphan nuclear receptor Nur77 regulates LKB1 localization and activates AMPK. Nat Chem Biol (2012) 1.75

Metabolomic profiling for the identification of novel biomarkers and mechanisms related to common cardiovascular diseases: form and function. Circulation (2012) 1.64

NR4A orphan nuclear receptors: transcriptional regulators of gene expression in metabolism and vascular biology. Arterioscler Thromb Vasc Biol (2010) 1.53

Intramuscular triacylglycerol and insulin resistance: guilty as charged or wrongly accused? Biochim Biophys Acta (2009) 1.34

Metabolic control of the Treg/Th17 axis. Immunol Rev (2013) 1.26

Bone marrow NR4A expression is not a dominant factor in the development of atherosclerosis or macrophage polarization in mice. J Lipid Res (2013) 1.00

The Drosophila NR4A nuclear receptor DHR38 regulates carbohydrate metabolism and glycogen storage. Mol Endocrinol (2010) 0.98

Exercise training reverses impaired skeletal muscle metabolism induced by artificial selection for low aerobic capacity. Am J Physiol Regul Integr Comp Physiol (2010) 0.94

Ketogenic essential amino acids modulate lipid synthetic pathways and prevent hepatic steatosis in mice. PLoS One (2010) 0.94

Nkx6.1 regulates islet β-cell proliferation via Nr4a1 and Nr4a3 nuclear receptors. Proc Natl Acad Sci U S A (2014) 0.89

Exploring pathway interactions in insulin resistant mouse liver. BMC Syst Biol (2011) 0.89

Acylcarnitines--old actors auditioning for new roles in metabolic physiology. Nat Rev Endocrinol (2015) 0.89

Muscle as a "mediator" of systemic metabolism. Cell Metab (2015) 0.89

Skeletal muscle Nur77 expression enhances oxidative metabolism and substrate utilization. J Lipid Res (2012) 0.88

Nuclear receptors reverse McGarry's vicious cycle to insulin resistance. Cell Metab (2012) 0.87

Genetic susceptibility and loss of Nr4a1 enhances macrophage-mediated renal injury in CKD. J Am Soc Nephrol (2014) 0.86

Nuclear receptor 4A (NR4A) family - orphans no more. J Steroid Biochem Mol Biol (2015) 0.86

Metabolite signatures of exercise training in human skeletal muscle relate to mitochondrial remodelling and cardiometabolic fitness. Diabetologia (2014) 0.84

Increasing muscle mass to improve metabolism. Adipocyte (2013) 0.83

Female Nur77-deficient mice show increased susceptibility to diet-induced obesity. PLoS One (2013) 0.82

NR4A1 is associated with chronic low-grade inflammation in patients with type 2 diabetes. Exp Ther Med (2014) 0.82

The orphan nuclear receptor Nur77 is a determinant of myofiber size and muscle mass in mice. Mol Cell Biol (2015) 0.81

Nur77 decreases atherosclerosis progression in apoE(-/-) mice fed a high-fat/high-cholesterol diet. PLoS One (2014) 0.81

Regulation of NR4A by nutritional status, gender, postnatal development and hormonal deficiency. Sci Rep (2014) 0.80

Nr4a1 siRNA expression attenuates α-MSH regulated gene expression in 3T3-L1 adipocytes. Mol Endocrinol (2011) 0.80

No association between variation in the NR4A1 gene locus and metabolic traits in white subjects at increased risk for type 2 diabetes. BMC Med Genet (2010) 0.80

Nur77 prevents excessive osteoclastogenesis by inducing ubiquitin ligase Cbl-b to mediate NFATc1 self-limitation. Elife (2015) 0.79

Interaction of ApoA-IV with NR4A1 and NR1D1 Represses G6Pase and PEPCK Transcription: Nuclear Receptor-Mediated Downregulation of Hepatic Gluconeogenesis in Mice and a Human Hepatocyte Cell Line. PLoS One (2015) 0.78

The orphan nuclear receptor NR4A1 specifies a distinct subpopulation of quiescent myeloid-biased long-term HSCs. Stem Cells (2015) 0.78

Prostaglandin A2 enhances cellular insulin sensitivity via a mechanism that involves the orphan nuclear receptor NR4A3. Horm Metab Res (2012) 0.78

Elevation of NR4A3 expression and its possible role in modulating insulin expression in the pancreatic beta cell. PLoS One (2014) 0.77

Rescue of Metabolic Alterations in AR113Q Skeletal Muscle by Peripheral Androgen Receptor Gene Silencing. Cell Rep (2016) 0.76

Cdk5r1 Overexpression Induces Primary β-Cell Proliferation. J Diabetes Res (2015) 0.76

AMPK regulates lipid accumulation in skeletal muscle cells through FTO-dependent demethylation of N(6)-methyladenosine. Sci Rep (2017) 0.75

Inhibition of DNA methyltransferase 1 increases nuclear receptor subfamily 4 group A member 1 expression and decreases blood glucose in type 2 diabetes. Oncotarget (2016) 0.75

Nur77 deletion impairs muscle growth during developmental myogenesis and muscle regeneration in mice. PLoS One (2017) 0.75

Nur77-deficiency in bone marrow-derived macrophages modulates inflammatory responses, extracellular matrix homeostasis, phagocytosis and tolerance. BMC Genomics (2016) 0.75

Nur77 suppresses hepatocellular carcinoma via switching glucose metabolism toward gluconeogenesis through attenuating phosphoenolpyruvate carboxykinase sumoylation. Nat Commun (2017) 0.75

Articles cited by this

Mechanism by which fatty acids inhibit insulin activation of insulin receptor substrate-1 (IRS-1)-associated phosphatidylinositol 3-kinase activity in muscle. J Biol Chem (2002) 9.76

Mitochondrial overload and incomplete fatty acid oxidation contribute to skeletal muscle insulin resistance. Cell Metab (2008) 9.74

Multiparameter metabolic analysis reveals a close link between attenuated mitochondrial bioenergetic function and enhanced glycolysis dependency in human tumor cells. Am J Physiol Cell Physiol (2006) 7.75

The multiple faces of caveolae. Nat Rev Mol Cell Biol (2007) 6.85

Regulation of muscle fiber type and running endurance by PPARdelta. PLoS Biol (2004) 5.66

Molecular mechanisms of insulin resistance in humans and their potential links with mitochondrial dysfunction. Diabetes (2006) 4.95

Macrophage PPAR gamma is required for normal skeletal muscle and hepatic insulin sensitivity and full antidiabetic effects of thiazolidinediones. J Clin Invest (2007) 4.86

Peroxisome proliferator-activated receptor-gamma co-activator 1alpha-mediated metabolic remodeling of skeletal myocytes mimics exercise training and reverses lipid-induced mitochondrial inefficiency. J Biol Chem (2005) 4.30

Fast/Glycolytic muscle fiber growth reduces fat mass and improves metabolic parameters in obese mice. Cell Metab (2008) 3.78

Advances in measuring cellular bioenergetics using extracellular flux. Drug Discov Today (2008) 3.49

Decreased lipid synthesis in livers of mice with disrupted Site-1 protease gene. Proc Natl Acad Sci U S A (2001) 3.13

CNTF reverses obesity-induced insulin resistance by activating skeletal muscle AMPK. Nat Med (2006) 3.11

Continuous fat oxidation in acetyl-CoA carboxylase 2 knockout mice increases total energy expenditure, reduces fat mass, and improves insulin sensitivity. Proc Natl Acad Sci U S A (2007) 2.85

Upregulation of myocellular DGAT1 augments triglyceride synthesis in skeletal muscle and protects against fat-induced insulin resistance. J Clin Invest (2007) 2.85

Structure and function of Nurr1 identifies a class of ligand-independent nuclear receptors. Nature (2003) 2.81

Nurr1 is essential for the induction of the dopaminergic phenotype and the survival of ventral mesencephalic late dopaminergic precursor neurons. Proc Natl Acad Sci U S A (1998) 2.76

Activation of liver X receptor improves glucose tolerance through coordinate regulation of glucose metabolism in liver and adipose tissue. Proc Natl Acad Sci U S A (2003) 2.50

Abrogation of nuclear receptors Nr4a3 and Nr4a1 leads to development of acute myeloid leukemia. Nat Med (2007) 2.38

Assessment of skeletal muscle triglyceride content by (1)H nuclear magnetic resonance spectroscopy in lean and obese adolescents: relationships to insulin sensitivity, total body fat, and central adiposity. Diabetes (2002) 2.37

The small molecule harmine is an antidiabetic cell-type-specific regulator of PPARgamma expression. Cell Metab (2007) 2.32

Deletion of Cavin/PTRF causes global loss of caveolae, dyslipidemia, and glucose intolerance. Cell Metab (2008) 2.28

Ligand activation of LXR beta reverses atherosclerosis and cellular cholesterol overload in mice lacking LXR alpha and apoE. J Clin Invest (2007) 2.24

NR4A orphan nuclear receptors are transcriptional regulators of hepatic glucose metabolism. Nat Med (2006) 2.15

A potential link between muscle peroxisome proliferator- activated receptor-alpha signaling and obesity-related diabetes. Cell Metab (2005) 2.14

Glucose transport and sensing in the maintenance of glucose homeostasis and metabolic harmony. J Clin Invest (2006) 2.09

Unimpaired thymic and peripheral T cell death in mice lacking the nuclear receptor NGFI-B (Nur77). Science (1995) 1.93

ERRalpha: a metabolic function for the oldest orphan. Trends Endocrinol Metab (2008) 1.83

Mechanisms underlying regulation of the expression and activities of the mammalian pyruvate dehydrogenase kinases. Arch Physiol Biochem (2006) 1.77

1,2-Diacylglycerol and ceramide levels in insulin-resistant tissues of the rat in vivo. J Biol Chem (1990) 1.74

Altered fiber distribution and fiber-specific glycolytic and oxidative enzyme activity in skeletal muscle of patients with type 2 diabetes. Diabetes Care (2006) 1.63

Nur77 coordinately regulates expression of genes linked to glucose metabolism in skeletal muscle. Mol Endocrinol (2007) 1.63

Skeletal muscle fiber composition is related to adiposity and in vitro glucose transport rate in humans. Am J Physiol (1995) 1.62

The orphan nuclear receptor, RORalpha, regulates gene expression that controls lipid metabolism: staggerer (SG/SG) mice are resistant to diet-induced obesity. J Biol Chem (2008) 1.48

Muscular diacylglycerol metabolism and insulin resistance. Physiol Behav (2007) 1.47

Nur77 regulates lipolysis in skeletal muscle cells. Evidence for cross-talk between the beta-adrenergic and an orphan nuclear hormone receptor pathway. J Biol Chem (2005) 1.41

Increased lipid accumulation and insulin resistance in transgenic mice expressing DGAT2 in glycolytic (type II) muscle. Am J Physiol Endocrinol Metab (2007) 1.30

Insulin resistance directly correlates with increased saturated fatty acids in skeletal muscle triglycerides. Metabolism (2000) 1.27

Fatty acid-induced insulin resistance: decreased muscle PI3K activation but unchanged Akt phosphorylation. J Clin Endocrinol Metab (2002) 1.27

Structural basis for the cell-specific activities of the NGFI-B and the Nurr1 ligand-binding domain. J Biol Chem (2005) 1.21

The orphan nuclear receptor, NOR-1, is a target of beta-adrenergic signaling in skeletal muscle. Endocrinology (2006) 1.21

p115 Interacts with the GLUT4 vesicle protein, IRAP, and plays a critical role in insulin-stimulated GLUT4 translocation. Mol Biol Cell (2005) 1.13

Dissociation between fat-induced in vivo insulin resistance and proximal insulin signaling in skeletal muscle in men at risk for type 2 diabetes. J Clin Endocrinol Metab (2004) 1.08

Role of nuclear receptors in the modulation of insulin secretion in lipid-induced insulin resistance. Biochem Soc Trans (2008) 1.05

Functional domains of the human orphan receptor ARP-1/COUP-TFII involved in active repression and transrepression. Mol Cell Biol (1997) 1.03

Muscle-specific deletion of the Glut4 glucose transporter alters multiple regulatory steps in glycogen metabolism. Mol Cell Biol (2005) 0.95

Rosiglitazone reduces liver fat and insulin requirements and improves hepatic insulin sensitivity and glycemic control in patients with type 2 diabetes requiring high insulin doses. J Clin Endocrinol Metab (2007) 0.94

The chicken ovalbumin upstream promoter-transcription factors modulate genes and pathways involved in skeletal muscle cell metabolism. J Biol Chem (2006) 0.94

Glucosamine infusion in rats rapidly impairs insulin stimulation of phosphoinositide 3-kinase but does not alter activation of Akt/protein kinase B in skeletal muscle. Diabetes (1999) 0.91

Nur77 modulates hepatic lipid metabolism through suppression of SREBP1c activity. Biochem Biophys Res Commun (2007) 0.90

Modulation of glucocorticoid action and the treatment of type-2 diabetes. Best Pract Res Clin Endocrinol Metab (2007) 0.84

Articles by these authors

IKK-beta links inflammation to obesity-induced insulin resistance. Nat Med (2005) 12.07

Mitochondrial overload and incomplete fatty acid oxidation contribute to skeletal muscle insulin resistance. Cell Metab (2008) 9.74

Gut microbiota from twins discordant for obesity modulate metabolism in mice. Science (2013) 8.81

SIRT3 regulates mitochondrial fatty-acid oxidation by reversible enzyme deacetylation. Nature (2010) 6.48

Mechanisms of disease:Molecular and metabolic mechanisms of insulin resistance and beta-cell failure in type 2 diabetes. Nat Rev Mol Cell Biol (2008) 6.23

Reciprocal regulation of inflammation and lipid metabolism by liver X receptors. Nat Med (2003) 6.21

LXR regulates cholesterol uptake through Idol-dependent ubiquitination of the LDL receptor. Science (2009) 5.23

Oxidized mitochondrial DNA activates the NLRP3 inflammasome during apoptosis. Immunity (2012) 5.08

Hepatic expression of malonyl-CoA decarboxylase reverses muscle, liver and whole-animal insulin resistance. Nat Med (2004) 5.04

Liver X receptors as integrators of metabolic and inflammatory signaling. J Clin Invest (2006) 4.92

Macrophage PPAR gamma is required for normal skeletal muscle and hepatic insulin sensitivity and full antidiabetic effects of thiazolidinediones. J Clin Invest (2007) 4.86

ApoE promotes the proteolytic degradation of Abeta. Neuron (2008) 4.75

Dissociation of hepatic steatosis and insulin resistance in mice overexpressing DGAT in the liver. Cell Metab (2007) 4.51

Peroxisome proliferator-activated receptor-gamma co-activator 1alpha-mediated metabolic remodeling of skeletal myocytes mimics exercise training and reverses lipid-induced mitochondrial inefficiency. J Biol Chem (2005) 4.30

The impact of a consortium of fermented milk strains on the gut microbiome of gnotobiotic mice and monozygotic twins. Sci Transl Med (2011) 4.24

Synthetic LXR ligand inhibits the development of atherosclerosis in mice. Proc Natl Acad Sci U S A (2002) 4.23

LXR-dependent gene expression is important for macrophage survival and the innate immune response. Cell (2004) 4.20

Bioenergetic analysis of peroxisome proliferator-activated receptor gamma coactivators 1alpha and 1beta (PGC-1alpha and PGC-1beta) in muscle cells. J Biol Chem (2003) 4.12

Hyperlipidemic effects of dietary saturated fats mediated through PGC-1beta coactivation of SREBP. Cell (2005) 4.04

LXR signaling couples sterol metabolism to proliferation in the acquired immune response. Cell (2008) 4.02

Integration of metabolism and inflammation by lipid-activated nuclear receptors. Nature (2008) 3.94

Relationships between circulating metabolic intermediates and insulin action in overweight to obese, inactive men and women. Diabetes Care (2009) 3.69

Direct and indirect mechanisms for regulation of fatty acid synthase gene expression by liver X receptors. J Biol Chem (2002) 3.58

Suppression of oxidative stress by β-hydroxybutyrate, an endogenous histone deacetylase inhibitor. Science (2012) 3.52

SIRT3 deficiency and mitochondrial protein hyperacetylation accelerate the development of the metabolic syndrome. Mol Cell (2011) 3.33

Leptin therapy in insulin-deficient type I diabetes. Proc Natl Acad Sci U S A (2010) 3.23

A futile metabolic cycle activated in adipocytes by antidiabetic agents. Nat Med (2002) 3.22

Differential metabolic impact of gastric bypass surgery versus dietary intervention in obese diabetic subjects despite identical weight loss. Sci Transl Med (2011) 3.20

Absence of the SRC-2 coactivator results in a glycogenopathy resembling Von Gierke's disease. Science (2008) 3.17

Lipin, a lipodystrophy and obesity gene. Cell Metab (2005) 3.16

The effect of thiazolidinediones on plasma adiponectin levels in normal, obese, and type 2 diabetic subjects. Diabetes (2002) 3.15

Obesity-related derangements in metabolic regulation. Annu Rev Biochem (2006) 3.14

Lamins A and C but not lamin B1 regulate nuclear mechanics. J Biol Chem (2006) 3.02

Apoptotic cells promote their own clearance and immune tolerance through activation of the nuclear receptor LXR. Immunity (2009) 2.99

Crosstalk between LXR and toll-like receptor signaling mediates bacterial and viral antagonism of cholesterol metabolism. Mol Cell (2003) 2.99

Lamin B1 is required for mouse development and nuclear integrity. Proc Natl Acad Sci U S A (2004) 2.89

Three mammalian lipins act as phosphatidate phosphatases with distinct tissue expression patterns. J Biol Chem (2006) 2.89

Interleukin-6 increases insulin-stimulated glucose disposal in humans and glucose uptake and fatty acid oxidation in vitro via AMP-activated protein kinase. Diabetes (2006) 2.80

Transcriptional integration of metabolism by the nuclear sterol-activated receptors LXR and FXR. Nat Rev Mol Cell Biol (2012) 2.78

Reactive oxygen species enhance insulin sensitivity. Cell Metab (2009) 2.77

Regulation of multidrug resistance-associated protein 2 (ABCC2) by the nuclear receptors pregnane X receptor, farnesoid X-activated receptor, and constitutive androstane receptor. J Biol Chem (2001) 2.70

Metabolomics applied to diabetes research: moving from information to knowledge. Diabetes (2009) 2.68

Genetic networks of liver metabolism revealed by integration of metabolic and transcriptional profiling. PLoS Genet (2008) 2.63

Mutations in LMF1 cause combined lipase deficiency and severe hypertriglyceridemia. Nat Genet (2007) 2.60

Identification of macrophage liver X receptors as inhibitors of atherosclerosis. Proc Natl Acad Sci U S A (2002) 2.56

HSP72 protects against obesity-induced insulin resistance. Proc Natl Acad Sci U S A (2008) 2.52

Activation of liver X receptor improves glucose tolerance through coordinate regulation of glucose metabolism in liver and adipose tissue. Proc Natl Acad Sci U S A (2003) 2.50

Circadian clock NAD+ cycle drives mitochondrial oxidative metabolism in mice. Science (2013) 2.49

Metabolic syndrome: from epidemiology to systems biology. Nat Rev Genet (2008) 2.49

Nuclear receptors in lipid metabolism: targeting the heart of dyslipidemia. Annu Rev Med (2006) 2.44

Tumor necrosis factor alpha-induced skeletal muscle insulin resistance involves suppression of AMP-kinase signaling. Cell Metab (2006) 2.43

Dissecting the in vivo metabolic potential of two human gut acetogens. J Biol Chem (2010) 2.42

Alternatively spliced lipin isoforms exhibit distinct expression pattern, subcellular localization, and role in adipogenesis. J Biol Chem (2005) 2.42

A role for the apoptosis inhibitory factor AIM/Spalpha/Api6 in atherosclerosis development. Cell Metab (2005) 2.42

Heterozygosity for Lmna deficiency eliminates the progeria-like phenotypes in Zmpste24-deficient mice. Proc Natl Acad Sci U S A (2004) 2.39

UCP2 regulates energy metabolism and differentiation potential of human pluripotent stem cells. EMBO J (2011) 2.36

Association of a peripheral blood metabolic profile with coronary artery disease and risk of subsequent cardiovascular events. Circ Cardiovasc Genet (2010) 2.34

The small molecule harmine is an antidiabetic cell-type-specific regulator of PPARgamma expression. Cell Metab (2007) 2.32

Deletion of Cavin/PTRF causes global loss of caveolae, dyslipidemia, and glucose intolerance. Cell Metab (2008) 2.28

Lipin expression preceding peroxisome proliferator-activated receptor-gamma is critical for adipogenesis in vivo and in vitro. J Biol Chem (2004) 2.25

Ligand activation of LXR beta reverses atherosclerosis and cellular cholesterol overload in mice lacking LXR alpha and apoE. J Clin Invest (2007) 2.24

Impaired development of atherosclerosis in hyperlipidemic Ldlr-/- and ApoE-/- mice transplanted with Abcg1-/- bone marrow. Arterioscler Thromb Vasc Biol (2006) 2.22

Nuclear receptors in macrophage biology: at the crossroads of lipid metabolism and inflammation. Annu Rev Cell Dev Biol (2004) 2.21

High heritability of metabolomic profiles in families burdened with premature cardiovascular disease. Mol Syst Biol (2009) 2.21

PGC-1beta in the regulation of hepatic glucose and energy metabolism. J Biol Chem (2003) 2.20

NR4A orphan nuclear receptors are transcriptional regulators of hepatic glucose metabolism. Nat Med (2006) 2.15

Overexpression of carnitine palmitoyltransferase-1 in skeletal muscle is sufficient to enhance fatty acid oxidation and improve high-fat diet-induced insulin resistance. Diabetes (2008) 2.14

Metabolic state of glioma stem cells and nontumorigenic cells. Proc Natl Acad Sci U S A (2011) 2.13

Endocrine functions of adipose tissue. Annu Rev Pathol (2007) 2.13

Muscle-specific deletion of carnitine acetyltransferase compromises glucose tolerance and metabolic flexibility. Cell Metab (2012) 2.11

Sarcopenia exacerbates obesity-associated insulin resistance and dysglycemia: findings from the National Health and Nutrition Examination Survey III. PLoS One (2010) 2.06

Attenuation of neuroinflammation and Alzheimer's disease pathology by liver x receptors. Proc Natl Acad Sci U S A (2007) 2.06

13C NMR isotopomer analysis reveals a connection between pyruvate cycling and glucose-stimulated insulin secretion (GSIS). Proc Natl Acad Sci U S A (2002) 2.04

A pyruvate cycling pathway involving cytosolic NADP-dependent isocitrate dehydrogenase regulates glucose-stimulated insulin secretion. J Biol Chem (2006) 2.03

The number of x chromosomes causes sex differences in adiposity in mice. PLoS Genet (2012) 2.02

Metabolomic profiling reveals distinct patterns of myocardial substrate use in humans with coronary artery disease or left ventricular dysfunction during surgical ischemia/reperfusion. Circulation (2009) 2.01

Induction of NR4A orphan nuclear receptor expression in macrophages in response to inflammatory stimuli. J Biol Chem (2005) 2.01

Metabolic cycling in control of glucose-stimulated insulin secretion. Am J Physiol Endocrinol Metab (2008) 1.99

A critical role of cavin (polymerase I and transcript release factor) in caveolae formation and organization. J Biol Chem (2007) 1.96

Nuclear receptors: decoding metabolic disease. FEBS Lett (2007) 1.95

The role of estrogens in control of energy balance and glucose homeostasis. Endocr Rev (2013) 1.93

Liver X receptor-dependent repression of matrix metalloproteinase-9 expression in macrophages. J Biol Chem (2003) 1.92

Cafeteria diet is a robust model of human metabolic syndrome with liver and adipose inflammation: comparison to high-fat diet. Obesity (Silver Spring) (2011) 1.90

Saturated, but not n-6 polyunsaturated, fatty acids induce insulin resistance: role of intramuscular accumulation of lipid metabolites. J Appl Physiol (1985) (2005) 1.88

The Nkx6.1 homeodomain transcription factor suppresses glucagon expression and regulates glucose-stimulated insulin secretion in islet beta cells. Proc Natl Acad Sci U S A (2005) 1.88