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Laughlin M, McIndoe R, Adams SH, Araiza R, Ayala JE, Kennedy L, Lanoue L, Lantier L, Macy J, Malabanan E, McGuinness OP, Perry R, Port D, Qi N, Elias CF, Shulman GI, Wasserman DH, Lloyd KCK. The mouse metabolic phenotyping center (MMPC) live consortium: an NIH resource for in vivo characterization of mouse models of diabetes and obesity. Mamm Genome 2024:10.1007/s00335-024-10067-y. [PMID: 39191872 DOI: 10.1007/s00335-024-10067-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Accepted: 08/14/2024] [Indexed: 08/29/2024]
Abstract
The Mouse Metabolic Phenotyping Center (MMPC)Live Program was established in 2023 by the National Institute for Diabetes, Digestive and Kidney Diseases (NIDDK) at the National Institutes of Health (NIH) to advance biomedical research by providing the scientific community with standardized, high quality phenotyping services for mouse models of diabetes and obesity. Emerging as the next iteration of the MMPC Program which served the biomedical research community for 20 years (2001-2021), MMPCLive is designed as an outwardly-facing consortium of service cores that collaborate to provide reduced-cost consultation and metabolic, physiologic, and behavioral phenotyping tests on live mice for U.S. biomedical researchers. Four MMPCLive Centers located at universities around the country perform complex and often unique procedures in vivo on a fee for service basis, typically on mice shipped from the client or directly from a repository or vendor. Current areas of expertise include energy balance and body composition, insulin action and secretion, whole body carbohydrate and lipid metabolism, cardiovascular and renal function, food intake and behavior, microbiome and xenometabolism, and metabolic pathway kinetics. Additionally, an opportunity arose to reduce barriers to access and expand the diversity of the biomedical research workforce by establishing the VIBRANT Program. Directed at researchers historically underrepresented in the biomedical sciences, VIBRANT-eligible investigators have access to testing services, travel and career development awards, expert advice and experimental design consultation, and short internships to learn test technologies. Data derived from experiments run by the Centers belongs to the researchers submitting mice for testing which can be made publicly available and accessible from the MMPCLive database following publication. In addition to services, MMPCLive staff provide expertise and advice to researchers, develop and refine test protocols, engage in outreach activities, publish scientific and technical papers, and conduct educational workshops and training sessions to aid researchers in unraveling the heterogeneity of diabetes and obesity.
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Affiliation(s)
- Maren Laughlin
- National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, USA
| | - Richard McIndoe
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, USA
| | - Sean H Adams
- Department of Surgery, School of Medicine, University of California Davis, Davis, USA
- Center for Alimentary and Metabolic Science, School of Medicine, University of California Davis, Davis, USA
| | - Renee Araiza
- Mouse Biology Program, University of California Davis, Davis, USA
| | | | - Lucy Kennedy
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, USA
| | - Louise Lanoue
- Mouse Biology Program, University of California Davis, Davis, USA
| | | | - James Macy
- Department of Comparative Medicine, Yale School of Medicine, New Haven, USA
| | | | | | - Rachel Perry
- Department of Internal Medicine, Yale School of Medicine, New Haven, USA
- Department of Cellular & Molecular Physiology, Yale School of Medicine, New Haven, USA
| | - Daniel Port
- Mouse Biology Program, University of California Davis, Davis, USA
| | - Nathan Qi
- Department of Molecular & Integrated Physiology, University of Michigan, Ann Arbor, USA
- Caswell Diabetes Institute, University of Michigan Medical School, Ann Arbor, USA
| | - Carol F Elias
- Department of Molecular & Integrated Physiology, University of Michigan, Ann Arbor, USA
- Caswell Diabetes Institute, University of Michigan Medical School, Ann Arbor, USA
| | - Gerald I Shulman
- Department of Internal Medicine, Yale School of Medicine, New Haven, USA
- Department of Cellular & Molecular Physiology, Yale School of Medicine, New Haven, USA
| | | | - K C Kent Lloyd
- Department of Surgery, School of Medicine, University of California Davis, Davis, USA.
- Mouse Biology Program, University of California Davis, Davis, USA.
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Han Y, Choi JY, Kwon EY. Mentha canadensis attenuates adiposity and hepatic steatosis in high-fat diet-induced obese mice. Nutr Res Pract 2023; 17:870-882. [PMID: 37780219 PMCID: PMC10522806 DOI: 10.4162/nrp.2023.17.5.870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/07/2023] [Accepted: 08/14/2023] [Indexed: 10/03/2023] Open
Abstract
BACKGROUND/OBJECTIVES Obesity is a major risk factor for metabolic syndrome, a global public health problem. Mentha canadensis (MA), a traditional phytomedicine and dietary herb used for centuries, was the focus of this study to investigate its effects on obesity. MATERIALS/METHODS Thirty-five male C57BL/6J mice were randomly divided into 2 groups and fed either a normal diet (ND, n = 10) or a high-fat diet (HFD, n = 25) for 4 weeks to induce obesity. After the obesity induction period, the HFD-fed mice were randomly separated into 2 groups: one group continued to be fed HFD (n = 15, HFD group), while the other group was fed HFD with 1.5% (w/w) MA ethanol extract (n = 10, MA group) for 13 weeks. RESULTS The results showed that body and white adipose tissue (WAT) weights were significantly decreased in the MA-supplemented group compared to the HFD group. Additionally, MA supplementation enhanced energy expenditure, leading to improvements in plasma lipids, cytokines, hepatic steatosis, and fecal lipids. Furthermore, MA supplementation regulated lipid-metabolism-related enzyme activity and gene expression, thereby suppressing lipid accumulation in the WAT and liver. CONCLUSIONS These findings indicate that MA has the potential to improve diet-induced obesity and its associated complications, including adiposity, dyslipidemia, hepatic steatosis, and inflammation.
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Affiliation(s)
- Youngji Han
- Biological Clock-based Anti-aging Convergence Regional Leading Research Center of National Research Foundation of Korea, Korea University, Sejong 30019, Korea
| | - Ji-Young Choi
- Department of Food and Nutrition, Chosun University, Gwangju 61452, Korea
| | - Eun-Young Kwon
- Department of Food Science and Nutrition, Kyungpook National University, Daegu 41566, Korea
- Center for Food and Nutritional Genomics Research, Kyungpook National University, Daegu 41566, Korea
- Center for Beautiful Aging, Kyungpook National University, Daegu 41566, Korea
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Chaves-Filho AB, Peixoto AS, Castro É, Oliveira TE, Perandini LA, Moreira RJ, da Silva RP, da Silva BP, Moretti EH, Steiner AA, Miyamoto S, Yoshinaga MY, Festuccia WT. Futile cycle of β-oxidation and de novo lipogenesis are associated with essential fatty acids depletion in lipoatrophy. Biochim Biophys Acta Mol Cell Biol Lipids 2023; 1868:159264. [PMID: 36535597 DOI: 10.1016/j.bbalip.2022.159264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 11/08/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022]
Abstract
Total absence of adipose tissue (lipoatrophy) is associated with the development of severe metabolic disorders including hepatomegaly and fatty liver. Here, we sought to investigate the impact of severe lipoatrophy induced by deletion of peroxisome proliferator-activated receptor gamma (PPARγ) exclusively in adipocytes on lipid metabolism in mice. Untargeted lipidomics of plasma, gastrocnemius and liver uncovered a systemic depletion of the essential linoleic (LA) and α-linolenic (ALA) fatty acids from several lipid classes (storage lipids, glycerophospholipids, free fatty acids) in lipoatrophic mice. Our data revealed that such essential fatty acid depletion was linked to increased: 1) capacity for liver mitochondrial fatty acid β-oxidation (FAO), 2) citrate synthase activity and coenzyme Q content in the liver, 3) whole-body oxygen consumption and reduced respiratory exchange rate in the dark period, and 4) de novo lipogenesis and carbon flux in the TCA cycle. The key role of de novo lipogenesis in hepatic steatosis was evidenced by an accumulation of stearic, oleic, sapienic and mead acids in liver. Our results thus indicate that the simultaneous activation of the antagonic processes FAO and de novo lipogenesis in liver may create a futile metabolic cycle leading to a preferential depletion of LA and ALA. Noteworthy, this previously unrecognized cycle may also explain the increased energy expenditure displayed by lipoatrophic mice, adding a new piece to the metabolic regulation puzzle in lipoatrophies.
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Affiliation(s)
- Adriano B Chaves-Filho
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil; Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil.
| | - Albert S Peixoto
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil
| | - Érique Castro
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil
| | - Tiago E Oliveira
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil
| | - Luiz A Perandini
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil
| | - Rafael J Moreira
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil
| | - Railmara P da Silva
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil
| | - Beatriz P da Silva
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil
| | - Eduardo H Moretti
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil
| | - Alexandre A Steiner
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil
| | - Sayuri Miyamoto
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil
| | - Marcos Y Yoshinaga
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof Lineu Prestes 1524, São Paulo 05508000, Brazil.
| | - William T Festuccia
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, Av. Prof Lineu Prestes 748, São Paulo 05508900, Brazil.
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John LM, Petersen N, Gerstenberg MK, Torz L, Pedersen K, Christoffersen BØ, Kuhre RE. Housing-temperature reveals energy intake counter-balances energy expenditure in normal-weight, but not diet-induced obese, male mice. Commun Biol 2022; 5:946. [PMID: 36088386 PMCID: PMC9464191 DOI: 10.1038/s42003-022-03895-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Most metabolic studies on mice are performed at room temperature, although under these conditions mice, unlike humans, spend considerable energy to maintain core temperature. Here, we characterize the impact of housing temperature on energy expenditure (EE), energy homeostasis and plasma concentrations of appetite- and glucoregulatory hormones in normal-weight and diet-induced obese (DIO) C57BL/6J mice fed chow or 45% high-fat-diet, respectively. Mice were housed for 33 days at 22, 25, 27.5, and 30 °C in an indirect-calorimetry-system. We show that energy expenditure increases linearly from 30 °C towards 22 °C and is ~30% higher at 22 °C in both mouse models. In normal-weight mice, food intake counter-balances EE. In contrast, DIO mice do not reduce food intake when EE is lowered. By end of study, mice at 30 °C, therefore, had higher body weight, fat mass and plasma glycerol and triglycerides than mice at 22 °C. Dysregulated counterbalancing in DIO mice may result from increased pleasure-based eating. The impact of ambient housing temperature on the interaction of energy intake, energy expenditure and glycemic control in normal and diet-induced obese mice is examined.
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Blackburn ML, Wankhade UD, Ono-Moore KD, Chintapalli SV, Fox R, Rutkowsky JM, Willis BJ, Tolentino T, Lloyd KCK, Adams SH. On the potential role of globins in brown adipose tissue: a novel conceptual model and studies in myoglobin knockout mice. Am J Physiol Endocrinol Metab 2021; 321:E47-E62. [PMID: 33969705 PMCID: PMC8321818 DOI: 10.1152/ajpendo.00662.2020] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Myoglobin (Mb) regulates O2 bioavailability in muscle and heart as the partial pressure of O2 (Po2) drops with increased tissue workload. Globin proteins also modulate cellular NO pools, "scavenging" NO at higher Po2 and converting NO2- to NO as Po2 falls. Myoglobin binding of fatty acids may also signal a role in fat metabolism. Interestingly, Mb is expressed in brown adipose tissue (BAT), but its function is unknown. Herein, we present a new conceptual model that proposes links between BAT thermogenic activation, concurrently reduced Po2, and NO pools regulated by deoxy/oxy-globin toggling and xanthine oxidoreductase (XOR). We describe the effect of Mb knockout (Mb-/-) on BAT phenotype [lipid droplets, mitochondrial markers uncoupling protein 1 (UCP1) and cytochrome C oxidase 4 (Cox4), transcriptomics] in male and female mice fed a high-fat diet (HFD, 45% of energy, ∼13 wk), and examine Mb expression during brown adipocyte differentiation. Interscapular BAT weights did not differ by genotype, but there was a higher prevalence of mid-large sized droplets in Mb-/-. COX4 protein expression was significantly reduced in Mb-/- BAT, and a suite of metabolic/NO/stress/hypoxia transcripts were lower. All of these Mb-/--associated differences were most apparent in females. The new conceptual model, and results derived from Mb-/- mice, suggest a role for Mb in BAT metabolic regulation, in part through sexually dimorphic systems and NO signaling. This possibility requires further validation in light of significant mouse-to-mouse variability of BAT Mb mRNA and protein abundances in wild-type mice and lower expression relative to muscle and heart.NEW & NOTEWORTHY Myoglobin confers the distinct red color to muscle and heart, serving as an oxygen-binding protein in oxidative fibers. Less attention has been paid to brown fat, a thermogenic tissue that also expresses myoglobin. In a mouse knockout model lacking myoglobin, brown fat had larger fat droplets and lower markers of mitochondrial oxidative metabolism, especially in females. Gene expression patterns suggest a role for myoglobin as an oxygen/nitric oxide-sensor that regulates cellular metabolic and signaling pathways.
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Affiliation(s)
- Michael L Blackburn
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Umesh D Wankhade
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | | | - Sree V Chintapalli
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Renee Fox
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
| | - Jennifer M Rutkowsky
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, University of California, Davis, California
- Mouse Metabolic Phenotyping Center, University of California, Davis, California
| | - Brandon J Willis
- Mouse Biology Program, University of California, Davis, California
| | - Todd Tolentino
- Mouse Metabolic Phenotyping Center, University of California, Davis, California
- Mouse Biology Program, University of California, Davis, California
| | - K C Kent Lloyd
- Mouse Metabolic Phenotyping Center, University of California, Davis, California
- Mouse Biology Program, University of California, Davis, California
- Department of Surgery, University of California Davis School of Medicine, Sacramento, California
| | - Sean H Adams
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Department of Surgery, University of California Davis School of Medicine, Sacramento, California
- Center for Alimentary and Metabolic Science, University of California Davis School of Medicine, Sacramento, California
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Ono-Moore KD, Olfert IM, Rutkowsky JM, Chintapalli SV, Willis BJ, Blackburn ML, Williams DK, O'Reilly J, Tolentino T, Lloyd KCK, Adams SH. Metabolic physiology and skeletal muscle phenotypes in male and female myoglobin knockout mice. Am J Physiol Endocrinol Metab 2021; 321:E63-E79. [PMID: 33969704 PMCID: PMC8321820 DOI: 10.1152/ajpendo.00624.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Myoglobin (Mb) is a regulator of O2 bioavailability in type I muscle and heart, at least when tissue O2 levels drop. Mb also plays a role in regulating cellular nitric oxide (NO) pools. Robust binding of long-chain fatty acids and long-chain acylcarnitines to Mb, and enhanced glucose metabolism in hearts of Mb knockout (KO) mice, suggest additional roles in muscle intermediary metabolism and fuel selection. To evaluate this hypothesis, we measured energy expenditure (EE), respiratory exchange ratio (RER), body weight gain and adiposity, glucose tolerance, and insulin sensitivity in Mb knockout (Mb-/-) and wild-type (WT) mice challenged with a high-fat diet (HFD, 45% of calories). In males (n = 10/genotype) and females (n = 9/genotype) tested at 5-6, 11-12, and 17-18 wk, there were no genotype effects on RER, EE, or food intake. RER and EE during cold (10°C, 72 h), and glucose and insulin tolerance, were not different compared with within-sex WT controls. At ∼18 and ∼19 wk of age, female Mb-/- adiposity was ∼42%-48% higher versus WT females (P = 0.1). Transcriptomics analyses (whole gastrocnemius, soleus) revealed few consistent changes, with the notable exception of a 20% drop in soleus transferrin receptor (Tfrc) mRNA. Capillarity indices were significantly increased in Mb-/-, specifically in Mb-rich soleus and deep gastrocnemius. The results indicate that Mb loss does not have a major impact on whole body glucose homeostasis, EE, RER, or response to a cold challenge in mice. However, the greater adiposity in female Mb-/- mice indicates a sex-specific effect of Mb KO on fat storage and feed efficiency.NEW & NOTEWORTHY The roles of myoglobin remain to be elaborated. We address sexual dimorphism in terms of outcomes in response to the loss of myoglobin in knockout mice and perform, for the first time, a series of comprehensive metabolic studies under conditions in which fat is mobilized (high-fat diet, cold). The results highlight that myoglobin is not necessary and sufficient for maintaining oxidative metabolism and point to alternative roles for this protein in muscle and heart.
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Affiliation(s)
| | - I Mark Olfert
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Jennifer M Rutkowsky
- Department of Molecular Biosciences, UC Davis School of Veterinary Medicine, University of California, Davis, California
- Mouse Metabolic Phenotyping Center, University of California, Davis, California
| | - Sree V Chintapalli
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Brandon J Willis
- Mouse Biology Program, University of California, Davis, California
| | - Michael L Blackburn
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - D Keith Williams
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Juliana O'Reilly
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Todd Tolentino
- Mouse Metabolic Phenotyping Center, University of California, Davis, California
- Mouse Biology Program, University of California, Davis, California
| | - K C Kent Lloyd
- Mouse Metabolic Phenotyping Center, University of California, Davis, California
- Mouse Biology Program, University of California, Davis, California
- Department of Surgery, University of California Davis School of Medicine, Sacramento, California
| | - Sean H Adams
- Arkansas Children's Nutrition Center, Little Rock, Arkansas
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
- Department of Surgery, University of California Davis School of Medicine, Sacramento, California
- Center for Alimentary and Metabolic Science, University of California Davis School of Medicine, Sacramento, California
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Talal S, Cease A, Farington R, Medina HE, Rojas J, Harrison J. High carbohydrate diet ingestion increases post-meal lipid synthesis and drives respiratory exchange ratios above 1. J Exp Biol 2021; 224:jeb.240010. [PMID: 33536308 DOI: 10.1242/jeb.240010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/13/2021] [Indexed: 01/03/2023]
Abstract
Locusts have been reported to elevate metabolic rate in response to high carbohydrate diets; this conclusion was based on metabolic rates calculated from CO2 production, a common practice for insects. However, respiratory exchange ratio (RER, CO2 production divided by O2 consumption) can rise above 1 as a result of de novo lipid synthesis, providing an alternative possible explanation of the prior findings. We studied the relationship between macronutrient ingestion, RER and lipid synthesis using South American locusts (Schistocerca cancellata) reared on artificial diets varying in protein:carbohydrate (p:c) ratio. RER increased and rose above 1 as dietary p:c ratio decreased. Lipid accumulation rates were strongly positively correlated with dietary carbohydrate content and ingestion. RERs above 1 were only observed for animals without food in the respirometry chamber, suggesting that hormonal changes after a meal may drive lipid synthesis. Schistocerca cancellata does not elevate metabolic rate on low p:c diets; in fact, the opposite trend was observed.
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Affiliation(s)
- Stav Talal
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA
| | - Arianne Cease
- School of Life Sciences, School of Sustainability, Arizona State University, Tempe, AZ 85281, USA
| | - Ruth Farington
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA
| | | | - Julio Rojas
- Departamento de Campañas Fitosanitarias, Dirección de Protección Vegetal, SENAVE, Paraguay
| | - Jon Harrison
- School of Life Sciences, Arizona State University, Tempe, AZ 85287, USA
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