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  1. Article ; Online: mTORC1 in energy expenditure: consequences for obesity.

    Allard, Camille / Miralpeix, Cristina / López-Gambero, Antonio J / Cota, Daniela

    Nature reviews. Endocrinology

    2024  Volume 20, Issue 4, Page(s) 239–251

    Abstract: In eukaryotic cells, the mammalian target of rapamycin complex 1 (sometimes referred to as the mechanistic target of rapamycin complex 1; mTORC1) orchestrates cellular metabolism in response to environmental energy availability. As a result, at the ... ...

    Abstract In eukaryotic cells, the mammalian target of rapamycin complex 1 (sometimes referred to as the mechanistic target of rapamycin complex 1; mTORC1) orchestrates cellular metabolism in response to environmental energy availability. As a result, at the organismal level, mTORC1 signalling regulates the intake, storage and use of energy by acting as a hub for the actions of nutrients and hormones, such as leptin and insulin, in different cell types. It is therefore unsurprising that deregulated mTORC1 signalling is associated with obesity. Strategies that increase energy expenditure offer therapeutic promise for the treatment of obesity. Here we review current evidence illustrating the critical role of mTORC1 signalling in the regulation of energy expenditure and adaptive thermogenesis through its various effects in neuronal circuits, adipose tissue and skeletal muscle. Understanding how mTORC1 signalling in one organ and cell type affects responses in other organs and cell types could be key to developing better, safer treatments targeting this pathway in obesity.
    MeSH term(s) Humans ; Mechanistic Target of Rapamycin Complex 1/metabolism ; Obesity/metabolism ; Signal Transduction/physiology ; Insulin/metabolism ; Energy Metabolism/physiology
    Chemical Substances Mechanistic Target of Rapamycin Complex 1 (EC 2.7.11.1) ; Insulin
    Language English
    Publishing date 2024-01-15
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2489381-X
    ISSN 1759-5037 ; 1759-5029
    ISSN (online) 1759-5037
    ISSN 1759-5029
    DOI 10.1038/s41574-023-00934-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Poly-Agonist Pharmacotherapies for Metabolic Diseases: Hopes and New Challenges.

    Allard, Camille / Cota, Daniela / Quarta, Carmelo

    Drugs

    2023  Volume 84, Issue 2, Page(s) 127–148

    Abstract: The use of glucagon-like peptide-1 (GLP-1) receptor-based multi-agonists in the treatment of type 2 diabetes and obesity holds great promise for improving glycaemic control and weight management. Unimolecular dual and triple agonists targeting multiple ... ...

    Abstract The use of glucagon-like peptide-1 (GLP-1) receptor-based multi-agonists in the treatment of type 2 diabetes and obesity holds great promise for improving glycaemic control and weight management. Unimolecular dual and triple agonists targeting multiple gut hormone-related pathways are currently in clinical trials, with recent evidence supporting their efficacy. However, significant knowledge gaps remain regarding the biological mechanisms and potential adverse effects associated with these multi-target agents. The mechanisms underlying the therapeutic efficacy of GLP-1 receptor-based multi-agonists remain somewhat mysterious, and hidden threats may be associated with the use of gut hormone-based polyagonists. In this review, we provide a critical analysis of the benefits and risks associated with the use of these new drugs in the management of obesity and diabetes, while also exploring new potential applications of GLP-1-based pharmacology beyond the field of metabolic disease.
    MeSH term(s) Humans ; Diabetes Mellitus, Type 2/drug therapy ; Diabetes Mellitus, Type 2/metabolism ; Glucagon-Like Peptide 1/therapeutic use ; Obesity/drug therapy ; Obesity/metabolism ; Metabolic Diseases/drug therapy ; Glucagon-Like Peptide-1 Receptor ; Hypoglycemic Agents/pharmacology ; Hypoglycemic Agents/therapeutic use
    Chemical Substances Glucagon-Like Peptide 1 (89750-14-1) ; Glucagon-Like Peptide-1 Receptor ; Hypoglycemic Agents
    Language English
    Publishing date 2023-12-21
    Publishing country New Zealand
    Document type Journal Article ; Review
    ZDB-ID 120316-2
    ISSN 1179-1950 ; 0012-6667
    ISSN (online) 1179-1950
    ISSN 0012-6667
    DOI 10.1007/s40265-023-01982-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Food intake and body weight in rodent studies: the devil is in the details.

    Allard, Camille / Zizzari, Philippe / Quarta, Carmelo / Cota, Daniela

    Nature metabolism

    2022  Volume 4, Issue 11, Page(s) 1424–1426

    MeSH term(s) Animals ; Rodentia ; Body Weight ; Eating
    Language English
    Publishing date 2022-10-17
    Publishing country Germany
    Document type Journal Article
    ISSN 2522-5812
    ISSN (online) 2522-5812
    DOI 10.1038/s42255-022-00658-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Single cell tracing of Pomc neurons reveals recruitment of 'Ghost' subtypes with atypical identity in a mouse model of obesity.

    Leon, Stéphane / Simon, Vincent / Lee, Thomas H / Steuernagel, Lukas / Clark, Samantha / Biglari, Nasim / Lesté-Lasserre, Thierry / Dupuy, Nathalie / Cannich, Astrid / Bellocchio, Luigi / Zizzari, Philippe / Allard, Camille / Gonzales, Delphine / Le Feuvre, Yves / Lhuillier, Emeline / Brochard, Alexandre / Nicolas, Jean Charles / Teillon, Jérémie / Nikolski, Macha /
    Marsicano, Giovanni / Fioramonti, Xavier / Brüning, Jens C / Cota, Daniela / Quarta, Carmelo

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 3443

    Abstract: The hypothalamus contains a remarkable diversity of neurons that orchestrate behavioural and metabolic outputs in a highly plastic manner. Neuronal diversity is key to enabling hypothalamic functions and, according to the neuroscience dogma, it is ... ...

    Abstract The hypothalamus contains a remarkable diversity of neurons that orchestrate behavioural and metabolic outputs in a highly plastic manner. Neuronal diversity is key to enabling hypothalamic functions and, according to the neuroscience dogma, it is predetermined during embryonic life. Here, by combining lineage tracing of hypothalamic pro-opiomelanocortin (Pomc) neurons with single-cell profiling approaches in adult male mice, we uncovered subpopulations of 'Ghost' neurons endowed with atypical molecular and functional identity. Compared to 'classical' Pomc neurons, Ghost neurons exhibit negligible Pomc expression and are 'invisible' to available neuroanatomical approaches and promoter-based reporter mice for studying Pomc biology. Ghost neuron numbers augment in diet-induced obese mice, independent of neurogenesis or cell death, but weight loss can reverse this shift. Our work challenges the notion of fixed, developmentally programmed neuronal identities in the mature hypothalamus and highlight the ability of specialised neurons to reversibly adapt their functional identity to adult-onset obesogenic stimuli.
    MeSH term(s) Animals ; Pro-Opiomelanocortin/metabolism ; Pro-Opiomelanocortin/genetics ; Neurons/metabolism ; Obesity/metabolism ; Obesity/pathology ; Male ; Mice ; Hypothalamus/metabolism ; Hypothalamus/cytology ; Single-Cell Analysis ; Disease Models, Animal ; Diet, High-Fat ; Mice, Inbred C57BL ; Mice, Transgenic ; Neurogenesis ; Mice, Obese
    Chemical Substances Pro-Opiomelanocortin (66796-54-1)
    Language English
    Publishing date 2024-04-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-47877-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Challenges of combining work and unpaid care, and solutions: A scoping review.

    Spann, Alice / Vicente, Joana / Allard, Camille / Hawley, Mark / Spreeuwenberg, Marieke / de Witte, Luc

    Health & social care in the community

    2019  Volume 28, Issue 3, Page(s) 699–715

    Abstract: The number of people who combine work and unpaid care is increasing rapidly as more people need care, public and private care systems are progressively under pressure and more people are required to work for longer. Without adequate support, these ... ...

    Abstract The number of people who combine work and unpaid care is increasing rapidly as more people need care, public and private care systems are progressively under pressure and more people are required to work for longer. Without adequate support, these working carers may experience detrimental effects on their well-being. To adequately support working carers, it is important to first understand the challenges they face. A scoping review was carried out, using Arksey and O'Malley's framework, to map the challenges of combining work and care and solutions described in the literature to address these challenges. The search included academic and grey literature between 2008 and 2018 and was conducted in April 2018, using electronic academic databases and reference list checks. Ninety-two publications were mapped, and the content analysed thematically. A conceptual framework was derived from the analysis which identified primary challenges (C1), directly resulting from combining work and care, primary solutions (S1) aiming to address these, secondary challenges (C2) resulting from solutions and secondary solutions (S2) aiming to address secondary challenges. Primary challenges were: (a) high and/or competing demands; (b) psychosocial/-emotional stressors; (c) distance; (d) carer's health; (e) returning to work; and (f) financial pressure. This framework serves to help those aiming to support working carers to better understand the challenges they face and those developing solutions for the challenges of combining work and care to consider potential consequences or barriers. Gaps in the literature have been identified and discussed.
    MeSH term(s) Caregiver Burden/economics ; Home Care Agencies ; Humans ; Internationality ; Social Support ; Workload/economics
    Language English
    Publishing date 2019-12-17
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1155902-0
    ISSN 1365-2524 ; 0966-0410
    ISSN (online) 1365-2524
    ISSN 0966-0410
    DOI 10.1111/hsc.12912
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Hypothalamic Glucose Hypersensitivity-Induced Insulin Secretion in the Obese Zücker Rat Is Reversed by Central Ghrelin Treatment.

    Carneiro, Lionel / Fenech, Claire / Liénard, Fabienne / Grall, Sylvie / Abed, Besma / Haydar, Joulia / Allard, Camille / Desmoulins, Lucie / Paccoud, Romain / Brindisi, Marie-Claude / Mouillot, Thomas / Brondel, Laurent / Fioramonti, Xavier / Pénicaud, Luc / Jacquin-Piques, Agnès / Leloup, Corinne

    Antioxidants & redox signaling

    2023  

    Abstract: Aims: ...

    Abstract Aims:
    Language English
    Publishing date 2023-03-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1483836-9
    ISSN 1557-7716 ; 1523-0864
    ISSN (online) 1557-7716
    ISSN 1523-0864
    DOI 10.1089/ars.2022.0031
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  7. Article ; Online: Efficacy of glucagon-like peptide-1 and estrogen dual agonist in pancreatic islets protection and pre-clinical models of insulin-deficient diabetes.

    Fuselier, Taylor / Mota de Sa, Paula / Qadir, M M Fahd / Xu, Beibei / Allard, Camille / Meyers, Mathew M / Tiano, Joseph P / Yang, Bin S / Gelfanov, Vasily / Lindsey, Sarah H / Dimarchi, Richard D / Mauvais-Jarvis, Franck

    Cell reports. Medicine

    2022  Volume 3, Issue 4, Page(s) 100598

    Abstract: We study the efficacy of a glucagon-like peptide-1 (GLP-1) and estrogen dual agonist (GLP1-E2) in pancreatic islet protection. GLP1-E2 provides superior protection from insulin-deficient diabetes induced by multiple low-dose streptozotocin (MLD-STZ- ... ...

    Abstract We study the efficacy of a glucagon-like peptide-1 (GLP-1) and estrogen dual agonist (GLP1-E2) in pancreatic islet protection. GLP1-E2 provides superior protection from insulin-deficient diabetes induced by multiple low-dose streptozotocin (MLD-STZ-diabetes) and by the Akita mutation in mice than a GLP-1 monoagonist. GLP1-E2 does not protect from MLD-STZ-diabetes in estrogen receptor-α (ERα)-deficient mice and fails to prevent diabetes in Akita mice following GLP-1 receptor (GLP-1R) antagonism, demonstrating the requirement of GLP-1R and ERα for GLP1-E2 antidiabetic actions. In the MIN6 β cell model, GLP1-E2 activates estrogen action following clathrin-dependent, GLP-1R-mediated internalization and lysosomal acidification. In cultured human islet, proteomic bioinformatic analysis reveals that GLP1-E2 amplifies the antiapoptotic pathways activated by monoagonists. However, in cultured mouse islets, GLP1-E2 provides antiapoptotic protection similar to monoagonists. Thus, GLP1-E2 promotes GLP-1 and E2 antiapoptotic signals in cultured islets, but
    MeSH term(s) Animals ; Diabetes Mellitus/metabolism ; Estrogen Receptor alpha/metabolism ; Estrogens/metabolism ; Glucagon-Like Peptide 1/pharmacology ; Insulin/metabolism ; Insulin, Regular, Human/metabolism ; Islets of Langerhans/metabolism ; Mice ; Proteomics ; Streptozocin/toxicity
    Chemical Substances Estrogen Receptor alpha ; Estrogens ; Insulin ; Insulin, Regular, Human ; Streptozocin (5W494URQ81) ; Glucagon-Like Peptide 1 (89750-14-1)
    Language English
    Publishing date 2022-04-07
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 2666-3791
    ISSN (online) 2666-3791
    DOI 10.1016/j.xcrm.2022.100598
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: The role of androgens in metabolism, obesity, and diabetes in males and females.

    Navarro, Guadalupe / Allard, Camille / Xu, Weiwei / Mauvais-Jarvis, Franck

    Obesity (Silver Spring, Md.)

    2015  Volume 23, Issue 4, Page(s) 713–719

    Abstract: Objective: In men, androgen deprivation contributes to the development of metabolic syndrome and type 2 diabetes (T2D). In women, androgen excess predisposes to insulin resistance and T2D. There is a bidirectional modulation of glucose homeostasis by ... ...

    Abstract Objective: In men, androgen deprivation contributes to the development of metabolic syndrome and type 2 diabetes (T2D). In women, androgen excess predisposes to insulin resistance and T2D. There is a bidirectional modulation of glucose homeostasis by androgens in males and females that is analyzed in this review.
    Methods: We reviewed the literature in both rodents and humans on the role of androgens and the androgen receptor (AR) in the control of glucose and energy metabolism in health, obesity, and T2D.
    Results: Sex-specific activation of AR in the hypothalamus, skeletal muscle, liver, adipose tissue, and pancreatic islet β-cells accounts for maintenance or disruption in energy metabolism and glucose homeostasis.
    Conclusions: We argue that AR is a target to prevent androgen-related metabolic disorders.
    MeSH term(s) Adipose Tissue/metabolism ; Androgens/metabolism ; Animals ; Diabetes Mellitus, Type 2/metabolism ; Female ; Humans ; Insulin Resistance/physiology ; Male ; Metabolic Diseases/metabolism ; Metabolic Syndrome/metabolism ; Muscle, Skeletal/metabolism ; Obesity/metabolism ; Receptors, Androgen/metabolism ; Sex Factors
    Chemical Substances Androgens ; Receptors, Androgen
    Language English
    Publishing date 2015-04
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2230457-5
    ISSN 1930-739X ; 1071-7323 ; 1930-7381
    ISSN (online) 1930-739X
    ISSN 1071-7323 ; 1930-7381
    DOI 10.1002/oby.21033
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  9. Article ; Online: CB1 and GLP-1 Receptors Cross Talk Provides New Therapies for Obesity.

    Zizzari, Philippe / He, Rongjun / Falk, Sarah / Bellocchio, Luigi / Allard, Camille / Clark, Samantha / Lesté-Lasserre, Thierry / Marsicano, Giovanni / Clemmensen, Christoffer / Perez-Tilve, Diego / Finan, Brian / Cota, Daniela / Quarta, Carmelo

    Diabetes

    2020  Volume 70, Issue 2, Page(s) 415–422

    Abstract: Glucagon-like peptide 1 receptor (GLP-1R) agonists effectively improve glycemia and body weight in patients with type 2 diabetes and obesity but have limited weight-lowering efficacy and minimal insulin sensitizing action. In preclinical models, ... ...

    Abstract Glucagon-like peptide 1 receptor (GLP-1R) agonists effectively improve glycemia and body weight in patients with type 2 diabetes and obesity but have limited weight-lowering efficacy and minimal insulin sensitizing action. In preclinical models, peripherally restricted cannabinoid receptor type 1 (CB1R) inhibitors, which are devoid of the neuropsychiatric adverse effects observed with brain-penetrant CB1R blockers, ameliorate obesity and its multiple metabolic complications. Using mouse models with genetic loss of CB1R or GLP-1R, we demonstrate that these two metabolic receptors modulate food intake and body weight via reciprocal functional interactions. In diet-induced obese mice, the coadministration of a peripheral CB1R inhibitor with long-acting GLP-1R agonists achieves greater reduction in body weight and fat mass than monotherapies by promoting negative energy balance. This cotreatment also results in larger improvements in systemic and hepatic insulin action, systemic dyslipidemia, and reduction of hepatic steatosis. Thus, peripheral CB1R blockade may allow safely potentiating the antiobesity and antidiabetic effects of currently available GLP-1R agonists.
    MeSH term(s) Animals ; Blood Glucose/metabolism ; Body Composition/physiology ; Body Weight/physiology ; Diet, High-Fat ; Eating/physiology ; Energy Metabolism ; Glucagon-Like Peptide-1 Receptor/genetics ; Glucagon-Like Peptide-1 Receptor/metabolism ; Insulin/blood ; Leptin/blood ; Male ; Mice ; Mice, Knockout ; Obesity/genetics ; Obesity/metabolism ; Receptor, Cannabinoid, CB1/genetics ; Receptor, Cannabinoid, CB1/metabolism
    Chemical Substances Blood Glucose ; Glucagon-Like Peptide-1 Receptor ; Insulin ; Leptin ; Receptor, Cannabinoid, CB1
    Language English
    Publishing date 2020-11-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80085-5
    ISSN 1939-327X ; 0012-1797
    ISSN (online) 1939-327X
    ISSN 0012-1797
    DOI 10.2337/db20-0162
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Activation of hepatic estrogen receptor-α increases energy expenditure by stimulating the production of fibroblast growth factor 21 in female mice.

    Allard, Camille / Bonnet, Fabrice / Xu, Beibei / Coons, Laurel / Albarado, Diana / Hill, Cristal / Fagherazzi, Guy / Korach, Kenneth S / Levin, Ellis R / Lefante, John / Morrison, Christopher / Mauvais-Jarvis, Franck

    Molecular metabolism

    2019  Volume 22, Page(s) 62–70

    Abstract: Objective: The endogenous estrogen 17β-estradiol (E2) promotes metabolic homeostasis in premenopausal women. In a mouse model of post-menopausal metabolic syndrome, we reported that estrogens increased energy expenditure, thus preventing estrogen ... ...

    Abstract Objective: The endogenous estrogen 17β-estradiol (E2) promotes metabolic homeostasis in premenopausal women. In a mouse model of post-menopausal metabolic syndrome, we reported that estrogens increased energy expenditure, thus preventing estrogen deficiency-induced adiposity. Estrogens' prevention of fat accumulation was associated with increased serum concentrations of fibroblast growth factor 21 (FGF21), suggesting that FGF21 participates in estrogens' promotion of energy expenditure.
    Methods: We studied the effect of E2 on FGF21 production and the role of FGF21 in E2 stimulation of energy expenditure and prevention of adiposity, using female estrogen receptor (ER)- and FGF21-deficient mice fed a normal chow and a cohort of ovariectomized women from the French E3N prospective cohort study.
    Results: E2 acting on the hepatocyte ERα increases hepatic expression and production of FGF21 in female mice. In vivo activation of ERα increases the transcription of Fgf21 via an estrogen response element outside the promoter of Fgf21. Treatment with E2 increases oxygen consumption and energy expenditure and prevents whole body fat accumulation in ovariectomized female WT mice. The effect of E2 on energy expenditure is not observed in FGF21-deficient mice. While E2 treatment still prevents fat accumulation in FGF21-deficient mice, this effect is decreased compared to WT mice. In an observational cohort of ovariectomized women, E2 treatment was associated with lower serum FGF21 concentrations, which may reflect a healthier metabolic profile.
    Conclusions: In female mice, E2 action on the hepatocyte ERα increases Fgf21 transcription and FGF21 production, thus promoting energy expenditure and partially decreasing fat accumulation.
    MeSH term(s) Animals ; Energy Metabolism ; Estrogen Receptor alpha/metabolism ; Female ; Fibroblast Growth Factors/biosynthesis ; Fibroblast Growth Factors/deficiency ; Mice ; Mice, Inbred C57BL ; Mice, Knockout
    Chemical Substances Estrogen Receptor alpha ; fibroblast growth factor 21 ; Fibroblast Growth Factors (62031-54-3)
    Language English
    Publishing date 2019-02-14
    Publishing country Germany
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ISSN 2212-8778
    ISSN (online) 2212-8778
    DOI 10.1016/j.molmet.2019.02.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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