1
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Altarejos JY, Pangilinan J, Podgrabinska S, Akinci B, Foss-Freitas M, Neidert AH, Ray Y, Zheng W, Kim S, Kamat V, Huang M, Min S, Mastaitis J, Dominguez-Gutierrez G, Kim JH, Stevis P, Huang T, Zambrowicz B, Olson WC, Godin S, Bradley E, Gewitz AD, Baker M, Hench R, Davenport MS, Chenevert TL, DiPaola F, Yancopoulos GD, Murphy AJ, Herman GA, Musser BJ, Dansky H, Harp J, Gromada J, Sleeman MW, Oral EA, Olenchock BA. Preclinical, randomized phase 1, and compassionate use evaluation of REGN4461, a leptin receptor agonist antibody for leptin deficiency. Sci Transl Med 2023; 15:eadd4897. [PMID: 37992152 DOI: 10.1126/scitranslmed.add4897] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 10/25/2023] [Indexed: 11/24/2023]
Abstract
Deficiency in the adipose-derived hormone leptin or leptin receptor signaling causes class 3 obesity in individuals with genetic loss-of-function mutations in leptin or its receptor LEPR and metabolic and liver disease in individuals with hypoleptinemia secondary to lipoatrophy such as in individuals with generalized lipodystrophy. Therapies that restore leptin-LEPR signaling may resolve these metabolic sequelae. We developed a fully human monoclonal antibody (mAb), REGN4461 (mibavademab), that activates the human LEPR in the absence or presence of leptin. In obese leptin knockout mice, REGN4461 normalized body weight, food intake, blood glucose, and insulin sensitivity. In a mouse model of generalized lipodystrophy, REGN4461 alleviated hyperphagia, hyperglycemia, insulin resistance, dyslipidemia, and hepatic steatosis. In a phase 1, randomized, double-blind, placebo-controlled two-part study, REGN4461 was well tolerated with an acceptable safety profile. Treatment of individuals with overweight or obesity with REGN4461 decreased body weight over 12 weeks in those with low circulating leptin concentrations (<8 ng/ml) but had no effect on body weight in individuals with higher baseline leptin. Furthermore, compassionate-use treatment of a single patient with atypical partial lipodystrophy and a history of undetectable leptin concentrations associated with neutralizing antibodies to metreleptin was associated with noteable improvements in circulating triglycerides and hepatic steatosis. Collectively, these translational data unveil an agonist LEPR mAb that may provide clinical benefit in disorders associated with relatively low leptin concentrations.
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Affiliation(s)
- Judith Y Altarejos
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Jeffrey Pangilinan
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Simona Podgrabinska
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Baris Akinci
- Izmir Biomedicine and Genome Center, 35340 Izmir, Turkey
| | - Maria Foss-Freitas
- Brehm Center for Diabetes Research, Caswell Diabetes Institute, and Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI 48109, USA
| | - Adam H Neidert
- Brehm Center for Diabetes Research, Caswell Diabetes Institute, and Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yonaton Ray
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Wenjun Zheng
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Steven Kim
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Vishal Kamat
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Meilin Huang
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Soo Min
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Jason Mastaitis
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | | | - Jee-Hae Kim
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Panayiotis Stevis
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Tammy Huang
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Brian Zambrowicz
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - William C Olson
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Stephen Godin
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Elizabeth Bradley
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Andrew D Gewitz
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Mark Baker
- Brehm Center for Diabetes Research, Caswell Diabetes Institute, and Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI 48109, USA
| | - Rita Hench
- Brehm Center for Diabetes Research, Caswell Diabetes Institute, and Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI 48109, USA
| | - Matthew S Davenport
- Department of Radiology, Michigan Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Thomas L Chenevert
- Department of Radiology, Michigan Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Frank DiPaola
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - George D Yancopoulos
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Andrew J Murphy
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Gary A Herman
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Bret J Musser
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Hayes Dansky
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Joyce Harp
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Jesper Gromada
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Mark W Sleeman
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
| | - Elif A Oral
- Brehm Center for Diabetes Research, Caswell Diabetes Institute, and Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, MI 48109, USA
| | - Benjamin A Olenchock
- Regeneron Pharmaceuticals Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA
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2
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Adam RC, Pryce DS, Lee JS, Zhao Y, Mintah IJ, Min S, Halasz G, Mastaitis J, Atwal GS, Aykul S, Idone V, Economides AN, Lotta LA, Murphy AJ, Yancopoulos GD, Sleeman MW, Gusarova V. Activin E-ACVR1C cross talk controls energy storage via suppression of adipose lipolysis in mice. Proc Natl Acad Sci U S A 2023; 120:e2309967120. [PMID: 37523551 PMCID: PMC10410708 DOI: 10.1073/pnas.2309967120] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/13/2023] [Indexed: 08/02/2023] Open
Abstract
Body fat distribution is a heritable risk factor for cardiovascular and metabolic disease. In humans, rare Inhibin beta E (INHBE, activin E) loss-of-function variants are associated with a lower waist-to-hip ratio and protection from type 2 diabetes. Hepatic fatty acid sensing promotes INHBE expression during fasting and in obese individuals, yet it is unclear how the hepatokine activin E governs body shape and energy metabolism. Here, we uncover activin E as a regulator of adipose energy storage. By suppressing β-agonist-induced lipolysis, activin E promotes fat accumulation and adipocyte hypertrophy and contributes to adipose dysfunction in mice. Mechanistically, we demonstrate that activin E elicits its effect on adipose tissue through ACVR1C, activating SMAD2/3 signaling and suppressing PPARG target genes. Conversely, loss of activin E or ACVR1C in mice increases fat utilization, lowers adiposity, and drives PPARG-regulated gene signatures indicative of healthy adipose function. Our studies identify activin E-ACVR1C as a metabolic rheostat promoting liver-adipose cross talk to restrain excessive fat breakdown and preserve fat mass during prolonged fasting, a mechanism that is maladaptive in obese individuals.
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Affiliation(s)
| | | | | | - Yuanqi Zhao
- Regeneron Pharmaceuticals, Tarrytown, NY10591
| | | | - Soo Min
- Regeneron Pharmaceuticals, Tarrytown, NY10591
| | | | | | | | - Senem Aykul
- Regeneron Pharmaceuticals, Tarrytown, NY10591
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3
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Lee J, Wang J, Ally R, Trzaska S, Hickey J, Mujica A, Miloscio L, Mastaitis J, Morse B, Smith J, Atanasio A, Chiao E, Chen H, Latuszek A, Hu Y, Valenzuela D, Romano C, Zambrowicz B, Auerbach W. Production of large, defined genome modifications in rats by targeting rat embryonic stem cells. Stem Cell Reports 2022; 18:394-409. [PMID: 36525967 PMCID: PMC9860120 DOI: 10.1016/j.stemcr.2022.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 12/23/2022] Open
Abstract
Rats were more frequently used than mice to model human disease before mouse embryonic stem cells (mESCs) revolutionized genetic engineering in mice. Rat ESCs (rESCs) were first reported over 10 years ago, yet they are not as frequently used as mESCs. CRISPR-based gene editing in zygotes is widely used in rats but is limited by the difficulty of inserting or replacing DNA sequences larger than about 10 kb. We report here the generation of germline-competent rESC lines from several rat strains. These rESC lines maintain their potential for germline transmission after serial targeting with bacterial artificial chromosome (BAC)-based targeting vectors, and CRISPR-Cas9 cutting can increase targeting efficiency. Using these methods, we have successfully replaced entire rat genes spanning up to 101 kb with the human ortholog.
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Affiliation(s)
- Jeffrey Lee
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA.
| | | | - Roxanne Ally
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | - Sean Trzaska
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | | | - Alejo Mujica
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | | | | | - Brian Morse
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | - Janell Smith
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | | | - Eric Chiao
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | - Henry Chen
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
| | | | - Ying Hu
- Regeneron Pharmaceuticals, Tarrytown, NY 10591, USA
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4
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Omosule CL, Gremminger VL, Aguillard AM, Jeong Y, Harrelson EN, Miloscio L, Mastaitis J, Rafique A, Kleiner S, Pfeiffer FM, Zhang A, Schulz LC, Phillips CL. Impact of Genetic and Pharmacologic Inhibition of Myostatin in a Murine Model of Osteogenesis Imperfecta. J Bone Miner Res 2021; 36:739-756. [PMID: 33249643 PMCID: PMC8111798 DOI: 10.1002/jbmr.4223] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 11/13/2020] [Accepted: 11/19/2020] [Indexed: 01/05/2023]
Abstract
Osteogenesis imperfecta (OI) is a genetic connective tissue disorder characterized by compromised skeletal integrity, altered microarchitecture, and bone fragility. Current OI treatment strategies focus on bone antiresorptives and surgical intervention with limited effectiveness, and thus identifying alternative therapeutic options remains critical. Muscle is an important stimulus for bone formation. Myostatin, a TGF-β superfamily myokine, acts through ActRIIB to negatively regulate muscle growth. Recent studies demonstrated the potential benefit of myostatin inhibition with the soluble ActRIIB fusion protein on skeletal properties, although various OI mouse models exhibited variable skeletal responses. The genetic and clinical heterogeneity associated with OI, the lack of specificity of the ActRIIB decoy molecule for myostatin alone, and adverse events in human clinical trials further the need to clarify myostatin's therapeutic potential and role in skeletal integrity. In this study, we determined musculoskeletal outcomes of genetic myostatin deficiency and postnatal pharmacological myostatin inhibition by a monoclonal anti-myostatin antibody (Regn647) in the G610C mouse, a model of mild-moderate type I/IV human OI. In the postnatal study, 5-week-old wild-type and +/G610C male and female littermates were treated with Regn647 or a control antibody for 11 weeks or for 7 weeks followed by a 4-week treatment holiday. Inhibition of myostatin, whether genetically or pharmacologically, increased muscle mass regardless of OI genotype, although to varying degrees. Genetic myostatin deficiency increased hindlimb muscle weights by 6.9% to 34.4%, whereas pharmacological inhibition increased them by 13.5% to 29.6%. Female +/mstn +/G610C (Dbl.Het) mice tended to have similar trabecular and cortical bone parameters as Wt showing reversal of +/G610C characteristics but with minimal effect of +/mstn occurring in male mice. Pharmacologic myostatin inhibition failed to improve skeletal bone properties of male or female +/G610C mice, although skeletal microarchitectural and biomechanical improvements were observed in male wild-type mice. Four-week treatment holiday did not alter skeletal outcomes. © 2020 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
| | | | | | - Youngjae Jeong
- Department of Biochemistry, University of Missouri, Columbia, MO, USA
| | - Emily N Harrelson
- Department of Biochemistry, University of Missouri, Columbia, MO, USA
| | | | | | | | | | - Ferris M Pfeiffer
- Department of Biomedical, Biological, and Chemical Engineering, University of Missouri, Columbia, MO, USA
| | - Anqing Zhang
- Department of Biostatistics and Research Design, University of Missouri, Columbia, MO, USA
| | - Laura C Schulz
- Department of Obstetrics, Gynecology, and Women's Health, University of Missouri, Columbia, MO, USA
| | - Charlotte L Phillips
- Department of Biochemistry, University of Missouri, Columbia, MO, USA.,Department of Child Health, University of Missouri, Columbia, MO, USA
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5
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Latres E, Mastaitis J, Fury W, Miloscio L, Trejos J, Pangilinan J, Okamoto H, Cavino K, Na E, Papatheodorou A, Willer T, Bai Y, Hae Kim J, Rafique A, Jaspers S, Stitt T, Murphy AJ, Yancopoulos GD, Gromada J. Activin A more prominently regulates muscle mass in primates than does GDF8. Nat Commun 2017; 8:15153. [PMID: 28452368 PMCID: PMC5414365 DOI: 10.1038/ncomms15153] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 03/06/2017] [Indexed: 12/19/2022] Open
Abstract
Growth and differentiation factor 8 (GDF8) is a TGF-β superfamily member, and negative regulator of skeletal muscle mass. GDF8 inhibition results in prominent muscle growth in mice, but less impressive hypertrophy in primates, including man. Broad TGF-β inhibition suggests another family member negatively regulates muscle mass, and its blockade enhances muscle growth seen with GDF8-specific inhibition. Here we show that activin A is the long-sought second negative muscle regulator. Activin A specific inhibition, on top of GDF8 inhibition, leads to pronounced muscle hypertrophy and force production in mice and monkeys. Inhibition of these two ligands mimics the hypertrophy seen with broad TGF-β blockers, while avoiding the adverse effects due to inhibition of multiple family members. Altogether, we identify activin A as a second negative regulator of muscle mass, and suggest that inhibition of both ligands provides a preferred therapeutic approach, which maximizes the benefit:risk ratio for muscle diseases in man. Inhibition of GDF8 increases muscle mass in mice, but is less effective in monkeys and humans. Here the authors show that activin A also inhibits muscle hypertrophy and that concomitant inhibition of activin A and GDF8 synergistically increases muscle mass in mice and non-human primates.
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Affiliation(s)
- Esther Latres
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Jason Mastaitis
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Wen Fury
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Lawrence Miloscio
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Jesus Trejos
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Jeffrey Pangilinan
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Haruka Okamoto
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Katie Cavino
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Erqian Na
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Angelos Papatheodorou
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Tobias Willer
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Yu Bai
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Jee Hae Kim
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Ashique Rafique
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Stephen Jaspers
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Trevor Stitt
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Andrew J Murphy
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - George D Yancopoulos
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
| | - Jesper Gromada
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, New York 10591, USA
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6
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Mastaitis J, Eckersdorff M, Min S, Xin Y, Cavino K, Aglione J, Okamoto H, Na E, Stitt T, Dominguez MG, Schmahl JP, Lin C, Gale NW, Valenzuela DM, Murphy AJ, Yancopoulos GD, Gromada J. Loss of SFRP4 Alters Body Size, Food Intake, and Energy Expenditure in Diet-Induced Obese Male Mice. Endocrinology 2015; 156:4502-10. [PMID: 26406932 DOI: 10.1210/en.2015-1257] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Secreted frizzled-related protein 4 (SFRP4) is an extracellular regulator of the wingless-type mouse mammary tumor virus integration site family (WNT) pathway. SFRP4 has been implicated in adipocyte dysfunction, obesity, insulin resistance, and impaired insulin secretion in patients with type 2 diabetes. However, the exact role of SFRP4 in regulating whole-body metabolism and glucose homeostasis is unknown. We show here that male Sfrp4(-/-) mice have increased spine length and gain more weight when fed a high-fat diet. The body composition and body mass per spine length of diet-induced obese Sfrp4(-/-) mice is similar to wild-type littermates, suggesting that the increase in body weight can be accounted for by their longer body size. The diet-induced obese Sfrp4(-/-) mice have reduced energy expenditure, food intake, and bone mineral density. Sfrp4(-/-) mice have normal glucose and insulin tolerance and β-cell mass. Diet-induced obese Sfrp4(-/-) and control mice show similar impairments of glucose tolerance and a 5-fold compensatory expansion of their β-cell mass. In summary, our data suggest that loss of SFRP4 alters body length and bone mineral density as well as energy expenditure and food intake. However, SFRP4 does not control glucose homeostasis and β-cell mass in mice.
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Affiliation(s)
| | | | - Soo Min
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | - Yurong Xin
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | - Katie Cavino
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | | | - Haruka Okamoto
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | - Erqian Na
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | - Trevor Stitt
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | | | | | - Calvin Lin
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
| | | | | | | | | | - Jesper Gromada
- Regeneron Pharmaceuticals, Inc, Tarrytown, New York 10591
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7
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Latres E, Pangilinan J, Miloscio L, Bauerlein R, Na E, Potocky TB, Huang Y, Eckersdorff M, Rafique A, Mastaitis J, Lin C, Murphy AJ, Yancopoulos GD, Gromada J, Stitt T. Myostatin blockade with a fully human monoclonal antibody induces muscle hypertrophy and reverses muscle atrophy in young and aged mice. Skelet Muscle 2015; 5:34. [PMID: 26457176 PMCID: PMC4600334 DOI: 10.1186/s13395-015-0060-8] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 09/29/2015] [Indexed: 01/08/2023] Open
Abstract
Background Loss of skeletal muscle mass and function in humans is associated with significant morbidity and mortality. The role of myostatin as a key negative regulator of skeletal muscle mass and function has supported the concept that inactivation of myostatin could be a useful approach for treating muscle wasting diseases. Methods We generated a myostatin monoclonal blocking antibody (REGN1033) and characterized its effects in vitro using surface plasmon resonance biacore and cell-based Smad2/3 signaling assays. REGN1033 was tested in mice for the ability to induce skeletal muscle hypertrophy and prevent atrophy induced by immobilization, hindlimb suspension, or dexamethasone. The effect of REGN1033 on exercise training was tested in aged mice. Messenger RNA sequencing, immunohistochemistry, and ex vivo force measurements were performed on skeletal muscle samples from REGN1033-treated mice. Results The human monoclonal antibody REGN1033 is a specific and potent myostatin antagonist. Chronic treatment of mice with REGN1033 increased muscle fiber size, muscle mass, and force production. REGN1033 prevented the loss of muscle mass induced by immobilization, glucocorticoid treatment, or hindlimb unweighting and increased the gain of muscle mass during recovery from pre-existing atrophy. In aged mice, REGN1033 increased muscle mass and strength and improved physical performance during treadmill exercise. Conclusions We show that specific myostatin antagonism with the human antibody REGN1033 enhanced muscle mass and function in young and aged mice and had beneficial effects in models of skeletal muscle atrophy.
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Affiliation(s)
- Esther Latres
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Jeffrey Pangilinan
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Lawrence Miloscio
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Roy Bauerlein
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Erqian Na
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Terra B Potocky
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Ying Huang
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Mark Eckersdorff
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Ashique Rafique
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Jason Mastaitis
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Calvin Lin
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Andrew J Murphy
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - George D Yancopoulos
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Jesper Gromada
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
| | - Trevor Stitt
- Regeneron Pharmaceuticals, Inc., 777 Old Saw Mill River Road, Tarrytown, NY 10591 USA
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8
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Fan X, Chan O, Ding Y, Zhu W, Mastaitis J, Sherwin R. Reduction in SGLT1 mRNA Expression in the Ventromedial Hypothalamus Improves the Counterregulatory Responses to Hypoglycemia in Recurrently Hypoglycemic and Diabetic Rats. Diabetes 2015; 64:3564-72. [PMID: 26130763 PMCID: PMC4587643 DOI: 10.2337/db15-0022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 06/23/2015] [Indexed: 12/11/2022]
Abstract
The objective of this study was to determine whether the sodium-glucose transporter SGLT1 in the ventromedial hypothalamus (VMH) plays a role in glucose sensing and in regulating the counterregulatory response to hypoglycemia, and if so, whether knockdown of in the VMH can improve counterregulatory responses to hypoglycemia in diabetic rats or rats exposed to recurrent bouts of hypoglycemia (RH). Normal Sprague-Dawley rats as well as RH or streptozotocin (STZ)-diabetic rats received bilateral VMH microinjections of an adenoassociated viral vector containing either the SGLT1 short hairpin RNA (shRNA) or a scrambled RNA sequence. Subsequently, these rats underwent a hypoglycemic clamp to assess hormone responses. In a subgroup of rats, glucose kinetics was determined using tritiated glucose. The shRNA reduced VMH SGLT1 expression by 53% in nondiabetic rats, and this augmented glucagon and epinephrine responses and hepatic glucose production during hypoglycemia. Similarly, SGLT1 knockdown improved the glucagon and epinephrine responses in RH rats and restored the impaired epinephrine response to hypoglycemia in STZ-diabetic animals. These findings suggest that SGLT1 in the VMH plays a significant role in the detection and activation of counterregulatory responses to hypoglycemia. Inhibition of SGLT1 may offer a potential therapeutic target to diminish the risk of hypoglycemia in diabetes.
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Affiliation(s)
- Xiaoning Fan
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT
| | - Owen Chan
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT
| | - Yuyan Ding
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT
| | - Wanling Zhu
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT
| | - Jason Mastaitis
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT
| | - Robert Sherwin
- Department of Internal Medicine, Section of Endocrinology, Yale School of Medicine, New Haven, CT
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9
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Abstract
Accumulating evidence suggests that low-carbohydrate, high-fat diets are safe and effective to reduce glycemia in diabetic patients without producing significant cardiovascular risks. Most of these studies have been carried out specifically restricting carbohydrates, which tends to lead to increased protein intake, thus reducing the ketosis. However, diets that limit protein as well as carbohydrates, entailing a composition very high in fat, appear even more effective to reduce glucose and whole-body glucose metabolism in humans. In animal models, low-carbohydrate, high-protein diets do not produce ketosis or reduce glycemia but rather cause obesity. However, limiting both protein and carbohydrates as in a classic ketogenic diet remarkably reduces blood glucose in animal models of type 1 and type 2 diabetes and reverses diabetic nephropathy. Future studies should assess if ketogenic diets would be effective to reverse diabetic complications in humans.
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Affiliation(s)
- Charles V Mobbs
- The Graduate School of the Icahn School of Medicine at Mount Sinai, New York, NY 10028, USA.
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10
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Yang L, Isoda F, Yen K, Kleopoulos SP, Janssen W, Fan X, Mastaitis J, Dunn-Meynell A, Levin B, McCrimmon R, Sherwin R, Musatov S, Mobbs CV. Hypothalamic Fkbp51 is induced by fasting, and elevated hypothalamic expression promotes obese phenotypes. Am J Physiol Endocrinol Metab 2012; 302:E987-91. [PMID: 22318949 PMCID: PMC3330722 DOI: 10.1152/ajpendo.00474.2011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To discover hypothalamic genes that might play a role in regulating energy balance, we carried out a microarray screen for genes induced by a 48-h fast in male C57Bl/6J mouse hypothalamus. One such gene was Fkbp51 (FK506 binding protein 5; Locus NP_034350). The product of this gene is of interest because it blocks glucocorticoid action, suggesting that fasting-induced elevation of this gene in the hypothalamus may reduce glucocorticoid negative feedback, leading to elevated glucocorticoid levels, thus promoting obese phenotypes. Subsequent analysis demonstrated that a 48-h fast induces Fkbp51 in ventromedial, paraventricular, and arcuate hypothalamic nuclei of mice and rats. To assess if hypothalamic Fkbp51 promotes obesity, the gene was transferred to the hypothalamus via an adeno-associated virus vector. Within 2 wk following Fkbp51 overexpression, mice on a high-fat diet exhibited elevated body weight, without hyperphagia, relative to mice receiving the control mCherry vector. Body weight remained elevated for more than 8 wk and was associated with elevated corticosterone and impaired glucose tolerance. These studies suggest that elevated hypothalamic Fkbp51 promotes obese phenotypes.
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Affiliation(s)
- Linda Yang
- Fishberg Dept. of Neuroscience, Mount Sinai School of Medicine, New York, NY 10029, USA
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11
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Abstract
Because appetite, hypothalamic gene expression, reproductive function, and adrenal function are highly sensitive to acute changes in plasma glucose levels, it has been hypothesized hypothalamic neurons sensitive to glucose play a role in regulating these functions. To assess this hypothesis, we examined these neuronendocrine functions in mice in which the glucokinase gene, which plays an essential role in neuroendocrine glucose sensing, has been ablated. Haploinsufficiency in heterozygous glucokinase knockout mice produced effects similar to those produced by hypoglycemia: impaired reproductive function, elevated plasma corticosterone, increased food intake, and hypothalamic gene expression similar to that observed in fasted or leptin-deficient obese mice (increased hypothalamic neuropeptide Y mRNA and reduced hypothalamic proopiomelanocortin mRNA). Plasma glucose was elevated 2-fold in glucokinase knockout mice, consistent with a maturity-onset diabetes of the young phenotype, but plasma insulin and leptin levels were normal. These data support the hypothesis that glucokinase plays a key role in the neuroendocrine regulation of metabolic economy.
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Affiliation(s)
- Xue-jun Yang
- Fishberg Center for Neuroscience and Department of Geriatrics, Mt. Sinai School of Medicine, 1 Gustave Levy Place, New York, New York 10029-6574, USA
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12
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Mobbs CV, Mastaitis J, Yen K, Schwartz J, Mohan V, Poplawski M, Isoda F. Low-carbohydrate diets cause obesity, low-carbohydrate diets reverse obesity: a metabolic mechanism resolving the paradox. Appetite 2006; 48:135-8. [PMID: 17141367 PMCID: PMC2714161 DOI: 10.1016/j.appet.2006.06.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2005] [Revised: 02/28/2006] [Accepted: 06/07/2006] [Indexed: 12/22/2022]
Abstract
High-fat diets produce obesity in part because, per calorie, glucose produces greater post-prandial thermogenesis than lipids, an effect probably mediated by glucose-sensing neurons. A very low-carbohydrate/high-fat/high-protein Atkins-type diet produces obesity but is marginally ketogenic in mice. In contrast, high-sucrose/low-fat diets, and very low-carbohydrate/high-fat/low-protein (anti-epileptic) ketogenic diets reverse diet-induced obesity independent of caloric intake. We propose that a non-ketogenic high-fat diet reduces glucose metabolism and signaling in glucose-sensing neurons, thereby reducing post-prandial thermogenesis, and that a ketogenic high-fat diet does not reduce glucose signaling, thereby preventing and/or reversing obesity.
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Affiliation(s)
- Charles V Mobbs
- Mt. Sinai School of Medicine, Department of Neuroscience and Geriatrics, Mt. Sinai School of Medicine, New York, NY 10029, USA.
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13
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Mobbs CV, Isoda F, Makimura H, Mastaitis J, Mizuno T, Shu IW, Yen K, Yang XJ. Impaired glucose signaling as a cause of obesity and the metabolic syndrome: the glucoadipostatic hypothesis. Physiol Behav 2005; 85:3-23. [PMID: 15924903 DOI: 10.1016/j.physbeh.2005.04.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Since nutrition-sensitive feedback signals normally act to maintain relatively stable levels of both available and stored nutritional resources, failure in one or more of these feedback signals could plausibly lead to obese phenotypes. The glucostatic hypothesis in its original form posited that glucose serves as a physiological satiety factor (in the sense that post-prandial increases in plasma glucose cause meal termination), but in this form the hypothesis has been difficult to prove, and, especially since the discovery of leptin, the glucostatic hypothesis has largely been abandoned. Nevertheless, reduction of plasma glucose levels or glucose signaling produces a profile of neuroendocrine responses similar to those produced by leptin deficiency. Since leptin is not a physiological satiety factor (because it does not increase before meal termination), yet leptin deficiency causes obesity, we suggest that the glucostatic hypothesis be re-formulated without reference to satiety (i.e., short-term effects on food intake). Instead we argue that like leptin signaling, glucose signaling regulates long-term energy balance, in part by regulating metabolic rate but also by chronically regulating food intake. We further speculate that high-fat diets produce obesity in part because carbohydrates are, per calorie, more effective than lipids to reduce food intake and increase metabolic rate. In support of this glucoadipostatic hypothesis, the 5 present review examines evidence that obesity and the metabolic syndrome may be due to reduction in neuroendocrine sensitivity to glucose leading to increased metabolic efficiency.
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Affiliation(s)
- Charles V Mobbs
- Fishberg Center for Neuroscience Neurobiology of Aging Laboratories, P.O. Box 1639 and Department of Geriatrics, Mt. Sinai School of Medicine, 1 Gustave Levy Pl., New York, NY 10029-6574, United States.
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14
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Mobbs CV, Yen K, Mastaitis J, Nguyen H, Watson E, Wurmbach E, Sealfon SC, Brooks A, Salton SRJ. Mining Microarrays for Metabolic Meaning: Nutritional Regulation of Hypothalamic Gene Expression. Neurochem Res 2004; 29:1093-103. [PMID: 15176466 DOI: 10.1023/b:nere.0000023596.49140.e0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
DNA microarray analysis has been used to investigate relative changes in the level of gene expression in the CNS, including changes that are associated with disease, injury, psychiatric disorders, drug exposure or withdrawal, and memory formation. We have used oligonucleotide microarrays to identify hypothalamic genes that respond to nutritional manipulation. In addition to commonly used microarray analysis based on criteria such as fold-regulation, we have also found that simply carrying out multiple t tests then sorting by P value constitutes a highly reliable method to detect true regulation, as assessed by real-time polymerase chain reaction (PCR), even for relatively low abundance genes or relatively low magnitude of regulation. Such analyses directly suggested novel mechanisms that mediate effects of nutritional state on neuroendocrine function and are being used to identify regulated gene products that may elucidate the metabolic pathology of obese ob/ob, lean Vgf-/Vgf-, and other models with profound metabolic impairments.
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Affiliation(s)
- Charles V Mobbs
- Fishberg Research Center for Neurobiology, Mount Sinai School of Medicine, New York, New York 10029, USA.
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