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  • 1
    Online Resource
    Online Resource
    De novo lipogenesis discriminates advanced hepatic fibrosis after an oral glucose load in non-obese subjects with non-alcoholic fatty liver disease
    Elsevier BV ; 2023
    In:  Journal of Hepatology Vol. 78 ( 2023-06), p. S611-S612
    Details
    In: Journal of Hepatology, Elsevier BV, Vol. 78 ( 2023-06), p. S611-S612
    Type of Medium: Online Resource
    ISSN: 0168-8278
    URL: Article
    DOI: 10.1016/S0168-8278(23)01932-3
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 2027112-8
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  • 2
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    Bariatric Surgery Alters the Postprandial Recovery From Hypoglycemia, Mediated by Cholinergic Signal
    American Diabetes Association ; 2023
    In:  Diabetes Vol. 72, No. 10 ( 2023-10-01), p. 1374-1383
    Details
    In: Diabetes, American Diabetes Association, Vol. 72, No. 10 ( 2023-10-01), p. 1374-1383
    Abstract: Roux-en-Y gastric bypass (GB) and sleeve gastrectomy (SG) surgeries increase prandial insulin and glucagon secretion but reduce the endogenous glucose production (EGP) response to hypoglycemia in comparison with control subjects who had not undergone gastric surgery (CN), suggesting that parasympathetic nervous system (PNS) plays a role. Here, we investigated the effect of acute PNS blockade on the post-meal counterregulatory response to insulin-induced hypoglycemia in GB and SG compared with CN. Glucose kinetics and islet cell secretion were measured in nine subjects without diabetes with GB and seven with SG and five CN during hyperinsulinemic-hypoglycemic clamp (∼3.2 mmol/L) combined with meal ingestion on two separate days with and without intravenous atropine infusion. Glucose and hormonal levels were similar at baseline and during steady-state hypoglycemia before meal ingestion in three groups and unaffected by atropine. Atropine infusion diminished prandial systemic appearance of ingested glucose (RaO) by 30%, EGP by 40%, and glucagon response to hypoglycemia by 90% in CN. In GB or SG, blocking PNS had no effect on the RaO or meal-induced hyperglucagonemia but increased EGP in SG without any effect in GB (P & lt; 0.05 interaction). These findings indicate that cholinergic signal contributes to the recovery from hypoglycemia by meal consumption in humans. However, bariatric surgery dissipates PNS-mediated physiologic responses to hypoglycemia in the fed state. Article Highlights Rerouted gut after Roux-en-Y gastric bypass (GB) and, to a lesser degree, after sleeve gastrectomy (SG) leads to larger glucose excursion and lower nadir glucose, predisposing individuals to hypoglycemia. Despite prandial hyperglucagonemia, endogenous glucose production response to hypoglycemia is reduced after GB or SG. Parasympathetic nervous system (PNS) activity plays a key role in regulation of glucose kinetics and islet cell function. We examined the effect of acute PNS blockade on counterregulatory glucose and islet cell response to meal ingestion during insulin-induced hypoglycemia among GB, SG, and control subjects who had not had gastric surgery. Our findings demonstrate that cholinergic signal is critical in the recovery from hypoglycemia by meal ingestion in humans who have not had gastric surgery, although prandial PNS-mediated physiologic responses to hypoglycemia are differentially changed by GB and SG.
    Type of Medium: Online Resource
    ISSN: 0012-1797
    URL: Article
    DOI: 10.2337/db23-0207
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2023
    detail.hit.zdb_id: 1501252-9
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  • 3
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    Online Resource
    227-LB: Kynurenine Pathway Is Associated with Preservation of Beta-Cell Function in Autoimmune Diabetes
    American Diabetes Association ; 2023
    In:  Diabetes Vol. 72, No. Supplement_1 ( 2023-06-20)
    Details
    In: Diabetes, American Diabetes Association, Vol. 72, No. Supplement_1 ( 2023-06-20)
    Abstract: Background: Autoimmune diabetes (AD) results from a loss of immune tolerance leading to the destruction of β-cells in the pancreas. Heterogeneity in severity of β-cell damage among people with AD is well-recognized, with some patients retaining a certain amount of insulin-producing cells for years despite the presence of pancreatic autoimmunity. Cellular and molecular mechanisms driving the preservation of β-cell function in AD remain unclear. Aim & Methods: To identify metabolic pathways associated with preservation of β-cell function we conducted a metabolomic study using gas and liquid chromatography-mass spectrometry (GC- and LC-MS) based platform on plasma samples collected from 32 subjects with adult-onset AD (median [Q1-Q3] age: 57 [52-62] ; disease duration: 4.5 [3.0-9.0] years) with different severity of β-cell dysfunction, compared with data from people with rheumatoid arthritis (RA, n=28). Metabolome profiles of pancreatic islets from healthy donors after in vitro treatment with proinflammatory cytokines was also evaluated. Results: Metabolomic analyses showed decreased plasma Kynurenine/Tryptophan ratio (KynTr), a marker of indoleamine 2,3 dioxygenase-1 (IDO1) activity, in people with AD compared to RA (0.023 vs 0.027, p=0.03). Among people with AD, KynTr was directly associated with fasting C-peptide levels (rho=0.365), independently of age, gender, body mass index, diabetes duration and Hba1c (p-value after adjustments= 0.003). Lower concentrations of Tryptophan was observed in pancreatic islets from healthy donors after treatment with proinflammatory cytokines. Conclusions: While confirming that IDO1 impairment is involved in the pathogenesis of AD and in the regulation of inflammatory response of pancreatic islets, our results show that KynTr is a marker of beta-cell damage in AD. Overall, this suggests that the kynurenine pathway may be studied as a possible target for therapies aimed at preserving beta-cell function also after a diagnosis of AD Disclosure E. Maddaloni: Consultant; Abbott, Merck KGaA, PIKDARE S. p. A., Speaker's Bureau; Medical Technology & Devices. F. Dotta: None. P. Marchetti: None. R. Buzzetti: None. A. Gastaldelli: Advisory Panel; Pfizer Inc., Novo Nordisk, Merck Sharp & Dohme Corp., Boehringer Ingelheim International GmbH, Consultant; Boehringer Ingelheim International GmbH, Eli Lilly and Company, Fractyl Health, Inc., Merck Sharp & Dohme Corp., Other Relationship; Pfizer Inc., Speaker's Bureau; Eli Lilly and Company. L. Navarini: Consultant; AbbVie Inc., Pfizer Inc., Bristol Myers, Celgene, MSD Life Science Foundation, Eli Lilly and Company, Novartis, Janssen Global Services, LLC. R. Amendolara: None. S. Fenizia: None. S. Pezzica: None. M. Tesi: None. L. D'onofrio: None. E. Bosi: None. Funding Italian Ministry of University and Research (PRIN 2017: 20175L9H7H)
    Type of Medium: Online Resource
    ISSN: 0012-1797
    URL: Article
    DOI: 10.2337/db23-227-LB
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2023
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  • 4
    Online Resource
    Online Resource
    High exposure to phthalates is associated with HbA1c worsening in type 2 diabetes subjects with and without edentulism: a prospective pilot study
    Springer Science and Business Media LLC ; 2022
    In:  Diabetology & Metabolic Syndrome Vol. 14, No. 1 ( 2022-12)
    Details
    In: Diabetology & Metabolic Syndrome, Springer Science and Business Media LLC, Vol. 14, No. 1 ( 2022-12)
    Abstract: Phthalates exposure and complete edentulism are related to both low socioeconomic status. No study by far has verified if and to what extent these two conditions are related. We aimed to explore their potential association and interplay in the metabolic control and cardiovascular risk profile. Methods In our small (n = 48) prospective pilot study twenty-four patients with type 2 diabetes (DnE) and twenty-four patients with type 2 diabetes and edentulism (DE) followed for 19 ± 2 months were treated according to best clinical standards. Phthalates’ exposure was evaluated by urinary concentration of di-2-ethylhexylphthalate (DEHP), metabolites, i.e. mono 2-ethylhexyl phthalate (MEHP), mono-2-ethyl-5-oxohexyl phthalate (MEOHP) and mono 2-ethyl-5-hydroxyhexyl phthalate (MEHHP). Results No association between phthalates and edentulism was found, nor did edentulism affect glucose control. Higher phthalates exposure was associated with a glycated haemoglobin worsening. This association was found for all the measured phthalates metabolites, both as a whole (DEHP; r = 0.33, p = 0.0209) and individually: MEHP (r = 0.41, p = 0.0033), MEHHP (r = 0.32, p = 0.028), MEOHP (r = 0.28, p = 0.0386). Conclusions Phthalates are not associated with edentulism but predict the worsening of glucose control in subjects with type 2 diabetes. These findings might prove relevant in identifying novel biomarkers of cardiometabolic risk. Further studies are needed to validate our results and estimate the true potential of phthalates in terms of risk assessment.
    Type of Medium: Online Resource
    ISSN: 1758-5996
    URL: Article
    DOI: 10.1186/s13098-022-00875-0
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2518786-7
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  • 5
    Online Resource
    Online Resource
    Glucose and lipid metabolism alterations after an oral lipid meal in patients with non-alcoholic fatty liver disease carrying the PNPLA3 rs738409 polymorphism
    Elsevier BV ; 2023
    In:  Journal of Hepatology Vol. 78 ( 2023-06), p. S605-S606
    Details
    In: Journal of Hepatology, Elsevier BV, Vol. 78 ( 2023-06), p. S605-S606
    Type of Medium: Online Resource
    ISSN: 0168-8278
    URL: Article
    DOI: 10.1016/S0168-8278(23)01422-8
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 2027112-8
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  • 6
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    360-OR: Hyperglucagonemia Reduces De Novo Lipogenesis and Increases Gluconeogenesis in Healthy Subjects
    American Diabetes Association ; 2022
    In:  Diabetes Vol. 71, No. Supplement_1 ( 2022-06-01)
    Details
    In: Diabetes, American Diabetes Association, Vol. 71, No. Supplement_1 ( 2022-06-01)
    Abstract: Although the effect of glucagon on glucose metabolism has been well characterized, its effect on lipid metabolism, particularly lipolysis and de novo lipogenesis, in humans in vivo has been poorly studied with controversial results. We examined the effect of short-term hyperglucagonemia on de novo lipogenesis (DNL) and endogenous glucose production (EGP) in 8 healthy normal glucose tolerant subjects (5M/3F, age=35±5, BMI= 24±1) who received a 12-hour (6PM to 6AM) glucagon infusion (6ng/kg/min) infusion with measurement of EGP (3-3H-glucose) on the following morning 6-AM. Subjects received deuterated water (D2O, 5g/kg fat free mass) at PM on the night prior to study. 8 weeks later subjects returned for a repeat study with 12-hour infusion of normal saline. DNL was quantified by measuring the incorporation of deuterated water into circulating triglycerides. Gluconeogenic rate was measured as (EGP) x (plasma C5/C2 glucose ratio) (EGP) x (plasma C5/C2 glucose ratio) . Plasma esterified and non-esterified FFA levels were measured with gas chromatography mass spectrometry (GC-MS) . Plasma glucagon increased from 57±3 to 219±21 pg/ml within one hour and remained elevated throughout the study. DNL was significantly decreased (1.64 ± 0.58% vs. 3.± 0.98%, p & lt;0.05) after glucagon versus saline infusion. Both plasma palmitate (0.73 ± 0.vs. 0.67 ± 0.mmol/L) and total FFA (1.35 ± 0.vs. 1.21 ±0.mmol/L) concentrations were elevated after glucagon infusion (p & lt;0.05) . EGP increased following glucagon infusion (2.13 ± 0.14 vs. 1.97± 0.11mg/kg/min, p =0.006) . The increase in EGP was primarily due to increased gluconeogenesis (1.48 ± 0.14 vs. 1.27 ± 0.11, p=0.02) , while the rate of glycogenolysis did not change (0.65± 0.14 vs. 0.70± 0.11, p=ns) . Conclusion: Short-term (12-hour) physiologic hyperglucagonemia in healthy subjects reduces hepatic de novo lipogenesis, stimulates adipose tissue lipolysis, and increases hepatic glucose production by increasing gluconeogenesis. Disclosure X.Chen: None. F.Carli: None. S.Pezzica: None. G.Mocciaro: None. D.Ciociaro: None. A.Gastaldelli: Advisory Panel; Boehringer Ingelheim International GmbH, Novo Nordisk Global Business Services, Consultant; Boehringer Ingelheim International GmbH, Inventiva Pharma, Other Relationship; Eli Lilly and Company, Gilead Sciences, Inc., Pfizer Inc., Speaker's Bureau; Novo Nordisk. R.A.Defronzo: Advisory Panel; AstraZeneca, Boehringer Ingelheim International GmbH, Intarcia Therapeutics, Inc., Novo Nordisk, Research Support; AstraZeneca, Boehringer Ingelheim International GmbH, Merck & Co., Inc., Speaker's Bureau; AstraZeneca. D.Tripathy: None. Funding EFSD Albert Renold Travel Fellowship; FAVHR
    Type of Medium: Online Resource
    ISSN: 0012-1797
    URL: Article
    DOI: 10.2337/db22-360-OR
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2022
    detail.hit.zdb_id: 1501252-9
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