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  • 1
    In: Diabetes Care, American Diabetes Association, Vol. 43, No. 5 ( 2020-05-01), p. 940-947
    Abstract: We evaluated the effect of optimizing metformin dosing on glycemia and body weight in type 2 diabetes. RESEARCH DESIGN AND METHODS This was a prespecified analysis of 6,823 participants in the Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness Study (GRADE) taking metformin as the sole glucose-lowering drug who completed a 4- to 14-week (mean ± SD 7.9 ± 2.4) run-in in which metformin was adjusted to 2,000 mg/day or a maximally tolerated lower dose. Participants had type 2 diabetes for & lt;10 years and an HbA1c ≥6.8% (51 mmol/mol) while taking ≥500 mg of metformin/day. Participants also received diet and exercise counseling. The primary outcome was the change in HbA1c during run-in. RESULTS Adjusted for duration of run-in, the mean ± SD change in HbA1c was −0.65 ± 0.02% (−7.1 ± 0.2 mmol/mol) when the dose was increased by ≥1,000 mg/day, −0.48 ± 0.02% (−5.2 ± 0.2 mmol/mol) when the dose was unchanged, and −0.23 ± 0.07% (−2.5 ± 0.8 mmol/mol) when the dose was decreased (n = 2,169, 3,548, and 192, respectively). Higher HbA1c at entry predicted greater reduction in HbA1c (P & lt; 0.001) in univariate and multivariate analyses. Weight loss adjusted for duration of run-in averaged 0.91 ± 0.05 kg in participants who increased metformin by ≥1,000 mg/day (n = 1,894). CONCLUSIONS Optimizing metformin to 2,000 mg/day or a maximally tolerated lower dose combined with emphasis on medication adherence and lifestyle can improve glycemia in type 2 diabetes and HbA1c values ≥6.8% (51 mmol/mol). These findings may help guide efforts to optimize metformin therapy among persons with type 2 diabetes and suboptimal glycemic control.
    Type of Medium: Online Resource
    ISSN: 0149-5992 , 1935-5548
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2020
    detail.hit.zdb_id: 1490520-6
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  • 2
    In: Diabetes Care, American Diabetes Association, Vol. 44, No. 2 ( 2021-02-01), p. 340-349
    Abstract: We investigated sex and racial differences in insulin sensitivity, β-cell function, and glycated hemoglobin (HbA1c) and the associations with selected phenotypic characteristics. RESEARCH DESIGN AND METHODS This is a cross-sectional analysis of baseline data from 3,108 GRADE (Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness Study) participants. All had type 2 diabetes diagnosed & lt;10 years earlier and were on metformin monotherapy. Insulin sensitivity and β-cell function were evaluated using the HOMA of insulin sensitivity and estimates from oral glucose tolerance tests, including the Matsuda Index, insulinogenic index, C-peptide index, and oral disposition index (DI). RESULTS The cohort was 56.6 ± 10 years of age (mean ± SD), 63.8% male, with BMI 34.2 ± 6.7 kg/m2, HbA1c 7.5 ± 0.5%, and type 2 diabetes duration 4.0 ± 2.8 years. Women had higher DI than men but similar insulin sensitivity. DI was the highest in Black/African Americans, followed by American Indians/Alaska Natives, Asians, and Whites in descending order. Compared with Whites, American Indians/Alaska Natives had significantly higher HbA1c, but Black/African Americans and Asians had lower HbA1c. However, when adjusted for glucose levels, Black/African Americans had higher HbA1c than Whites. Insulin sensitivity correlated inversely with BMI, waist-to-hip ratio, triglyceride-to-HDL-cholesterol ratio (TG/HDL-C), and the presence of metabolic syndrome, whereas DI was associated directly with age and inversely with BMI, HbA1c, and TG/HDL-C. CONCLUSIONS In the GRADE cohort, β-cell function differed by sex and race and was associated with the concurrent level of HbA1c. HbA1c also differed among the races, but not by sex. Age, BMI, and TG/HDL-C were associated with multiple measures of β-cell function and insulin sensitivity.
    Type of Medium: Online Resource
    ISSN: 0149-5992 , 1935-5548
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2021
    detail.hit.zdb_id: 1490520-6
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  • 3
    In: Diabetes Technology & Therapeutics, Mary Ann Liebert Inc, Vol. 21, No. 12 ( 2019-12-01), p. 682-690
    Type of Medium: Online Resource
    ISSN: 1520-9156 , 1557-8593
    Language: English
    Publisher: Mary Ann Liebert Inc
    Publication Date: 2019
    detail.hit.zdb_id: 2004914-6
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  • 4
    In: Diabetes Care, American Diabetes Association, Vol. 44, No. 10 ( 2021-10-01), p. 2286-2292
    Abstract: Type 2 diabetes is a risk factor for cognitive impairment. We examined the relation of glycemia, lipids, blood pressure (BP), hypertension history, and statin use with cognition in the Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness Study (GRADE). RESEARCH DESIGN AND METHODS Cross-sectional analyses from GRADE at baseline examined the association of glycemia (hemoglobin A1c [HbA1c]), LDL, systolic BP (SBP) and diastolic BP (DBP), hypertension history, and statin use with cognition assessed by the Spanish English Verbal Learning Test, letter and animal fluency tests, and Digit Symbol Substitution Test (DSST). RESULTS Among 5,047 GRADE participants, 5,018 (99.4%) completed cognitive assessments. Their mean age was 56.7 ± 10.0 years, and 36.4% were women. Mean diabetes duration was 4.0 ± 2.7 years. HbA1c was not related to cognition. Higher LDL was related to modestly worse DSST scores, whereas statin use was related to modestly better DSST scores. SBP between 120 and 139 mmHg and DBP between 80 and 89 mmHg were related to modestly better DSST scores. Hypertension history was not related to cognition. CONCLUSIONS In people with type 2 diabetes of a mean duration of & lt;5 years, lower LDL and statin use were related to modestly better executive cognitive function. SBP levels in the range of 120–139 mmHg and DBP levels in the range of 80–89 mmHg, but not lower levels, were related to modestly better executive function. These differences may not be clinically significant.
    Type of Medium: Online Resource
    ISSN: 0149-5992 , 1935-5548
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2021
    detail.hit.zdb_id: 1490520-6
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  • 5
    In: Diabetes Care, American Diabetes Association, Vol. 42, No. 11 ( 2019-11-01), p. 2098-2107
    Abstract: GRADE (Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness Study) is a 36-center unmasked, parallel treatment group, randomized controlled trial evaluating four diabetes medications added to metformin in people with type 2 diabetes (T2DM). We report baseline characteristics and compare GRADE participants to a National Health and Nutrition Examination Survey (NHANES) cohort. RESEARCH DESIGN AND METHODS Participants were age ≥30 years at the time of diagnosis, with duration of T2DM & lt;10 years, HbA1c 6.8–8.5% (51–69 mmol/mol), prescribed metformin monotherapy, and randomized to glimepiride, sitagliptin, liraglutide, or insulin glargine. RESULTS At baseline, GRADE’s 5,047 randomized participants were 57.2 ± 10.0 years of age, 63.6% male, with racial/ethnic breakdown of 65.7% white, 19.8% African American, 3.6% Asian, 2.7% Native American, 7.6% other or unknown, and 18.4% Hispanic/Latino. Duration of diabetes was 4.2 ± 2.8 years, with mean HbA1c of 7.5 ± 0.5% (58 ± 5.3 mmol/mol), BMI of 34.3 ± 6.8 kg/m2, and metformin dose of 1,944 ± 204 mg/day. Among the cohort, 67% reported a history of hypertension, 72% a history of hyperlipidemia, and 6.5% a history of heart attack or stroke. Applying GRADE inclusion criteria to NHANES indicates enrollment of a representative cohort with T2DM on metformin monotherapy (NHANES cohort average age, 57.9 years; mean HbA1c, 7.4% [57 mmol/mol]; BMI, 33.2 kg/m2; duration, 4.2 ± 2.5 years; and 7.2% with a history of cardiovascular disease). CONCLUSIONS The GRADE cohort represents patients with T2DM treated with metformin requiring a second diabetes medication. GRADE will inform decisions about the clinical effectiveness of the addition of four classes of diabetes medications to metformin.
    Type of Medium: Online Resource
    ISSN: 0149-5992 , 1935-5548
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2019
    detail.hit.zdb_id: 1490520-6
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  • 6
    In: JAMA Internal Medicine, American Medical Association (AMA), Vol. 183, No. 7 ( 2023-07-01), p. 705-
    Abstract: Type 2 diabetes (T2D) is the leading cause of kidney disease in the US. It is not known whether glucose-lowering medications differentially affect kidney function. Objective To evaluate kidney outcomes in the Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness (GRADE) trial comparing 4 classes of glucose-lowering medications added to metformin for glycemic management in individuals with T2D. Design, Setting, and Participants A randomized clinical trial was conducted at 36 sites across the US. Participants included adults with T2D for less than 10 years, a hemoglobin A 1c level between 6.8% and 8.5%, and estimated glomerular filtration rate (eGFR) greater than or equal to 60 mL/min/1.73 m 2 who were receiving metformin treatment. A total of 5047 participants were enrolled between July 8, 2013, and August 11, 2017, and followed up for a mean of 5.0 years (range, 0-7.6 years). Data were analyzed from February 21, 2022, to March 27, 2023. Interventions Addition of insulin glargine, glimepiride, liraglutide, or sitagliptin to metformin, with the medication combination continued until the HbA 1c was greater than 7.5%; thereafter, insulin was added to maintain glycemic control. Main Outcomes and Measures Chronic eGFR slope (change in eGFR between year 1 and trial end) and a composite kidney disease progression outcome (albuminuria, dialysis, transplant, or death due to kidney disease). Secondary outcomes included incident eGFR less than 60 mL/min/1.73 m 2 , 40% decrease in eGFR to less than 60 mL/min/1.73 m 2 , doubling of urine albumin-to-creatinine ratio (UACR) to 30 mg/g or greater, and progression of Kidney Disease Improving Global Outcomes stage. Analyses were intention-to-treat. Results Of the 5047 participants, 3210 (63.6%) were men. Baseline characteristics were mean (SD) age 57.2 (10.0) years; HbA 1c 7.5% (0.5%); diabetes duration, 4.2 (2.7) years; body mass index, 34.3 (6.8); blood pressure 128.3/77.3 (14.7/9.9) mm Hg; eGFR 94.9 (16.8) mL/min/1.73 m 2 ; and median UACR, 6.4 (IQR 3.1-16.9) mg/g; 2933 (58.1%) were treated with renin-angiotensin-aldosterone inhibitors. Mean chronic eGFR slope was −2.03 (95% CI, −2.20 to −1.86) mL/min/1.73 m 2 per year for patients receiving sitagliptin; glimepiride, −1.92 (95% CI, −2.08 to −1.75) mL/min/1.73 m 2 per year; liraglutide, −2.08 (95% CI, −2.26 to −1.90) mL/min/1.73 m 2 per year; and insulin glargine, −2.02 (95% CI, −2.19 to −1.84) mL/min/1.73 m 2 per year ( P  = .61). Mean composite kidney disease progression occurred in 135 (10.6%) patients receiving sitagliptin; glimepiride, 155 (12.4%); liraglutide, 152 (12.0%); and insulin glargine, 150 (11.9%) ( P  = .56). Most of the composite outcome was attributable to albuminuria progression (98.4%). There were no significant differences by treatment assignment in secondary outcomes. There were no adverse kidney events attributable to medication assignment. Conclusions and Relevance In this randomized clinical trial, among people with T2D and predominantly free of kidney disease at baseline, no significant differences in kidney outcomes were observed during 5 years of follow-up when a dipeptidyl peptidase 4 inhibitor, sulfonylurea, glucagonlike peptide 1 receptor agonist, or basal insulin was added to metformin for glycemic control. Trial Registration ClinicalTrials.gov Identifier: NCT01794143
    Type of Medium: Online Resource
    ISSN: 2168-6106
    Language: English
    Publisher: American Medical Association (AMA)
    Publication Date: 2023
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  • 7
    In: Diabetes, American Diabetes Association, Vol. 71, No. 6 ( 2022-06-01), p. 1261-1271
    Abstract: Islet autoimmunity may contribute to β-cell dysfunction in type 2 diabetes (T2D). Its prevalence and clinical significance have not been rigorously determined. In this ancillary study to the Glycemia Reduction Approaches in Diabetes: A Comparative Effectiveness Study (GRADE), we investigated the prevalence of cellular and humoral islet autoimmunity in patients with T2D duration of 4.0 ± 3.0 years (HbA1c 7.5 ± 0.5% on metformin alone). We measured T-cell autoreactivity against islet proteins, islet autoantibodies against 65-kDa GAD antigen, IA-2, and zinc transporter-8, and β-cell function. Cellular islet autoimmunity was present in 41.3%, humoral islet autoimmunity in 13.5%, and both in 5.3%. β-Cell function calculated as incremental area under the curve of glucose from 0–120 min (iAUC-CG) and ΔC-peptide(0–30)/Δglucose(0–30) from an oral glucose tolerance test was lower among T-cell–positive (T+) than T-cell–negative (T−) individuals using two different adjustments for insulin sensitivity (iAUC-CG: 13.2% [95% CI 0.3, 24.4] or 11.4% [95% CI 0.4, 21.2] lower; ΔC-peptide[0–30]/Δglucose[0–30] : 19% [95% CI 3.1, 32.3] or 17.7% [95% CI 2.6, 30.5%] lower). T+ patients had 17% higher HbA1c (95% CI 0.07, 0.28) and 7.7 mg/dL higher fasting plasma glucose levels (95% CI 0.2, 15.3) than T− patients. We conclude that islet autoimmunity is much more prevalent in patients with T2D than previously reported. T-cell–mediated autoimmunity is associated with diminished β-cell function and worse glycemic control.
    Type of Medium: Online Resource
    ISSN: 0012-1797
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2022
    detail.hit.zdb_id: 1501252-9
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  • 8
    In: Electro- and Magnetobiology, Informa UK Limited, Vol. 20, No. 2 ( 2001-01), p. 185-191
    Type of Medium: Online Resource
    ISSN: 1061-9526
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2001
    detail.hit.zdb_id: 2588120-6
    SSG: 12
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  • 9
    In: Diabetes, American Diabetes Association, Vol. 67, No. Supplement_1 ( 2018-07-01)
    Abstract: Delay in maximizing metformin (MET) therapy is a common problem - attributed to “clinical inertia” - which might be reduced if there were better understanding of the impact of increasing MET in persons already on MET at submaximal dosage. We determined the effect of optimizing MET dosage on glycemic control in GRADE study participants. We examined the HbA1c of 6767 participants before and after a run-in period, during which MET dosage was adjusted to 2000 mg daily, or a maximally tolerated lower dose. The run-in was 6-14 weeks for participants taking MET at a dose other than 2000 mg/day, or & gt;4 weeks if on 2000 mg/day at entry. To be eligible, participants had to have type 2 diabetes & lt;10 years and HbA1c & gt;6.8% while taking & gt;500 mg of MET daily and no other glucose-lowering drug. Participants also received diet and exercise counseling. Increases in MET dosing during run-in were associated with a progressive fall in HbA1c (p & lt;0.001). The mean decrease in HbA1c was 0.5 ± 1.1% (SD) in participants whose MET was increased by & lt;500 mg/day, 0.5 ± 0.9% for an increase of 500-999 mg/day, and 0.7 ± 1% for an increase of & gt;1000 mg/day. There was also a mean HbA1c decrease of 0.4 ± 0.9% if MET dosage was kept at 2000 mg/day (n=3472), and a mean HbA1c decrease of 0.2 ± 0.7% if the daily dose was decreased (from a mean of 2213 to 1612 mg/day, n=187) - possibly reflecting better adherence to medications and/or lifestyle recommendations. In subjects whose MET dosage was increased (n=3108), the decrease in HbA1c was inversely and strongly correlated with the initial HbA1c at entry (p & lt;0.001, r=-0.53). Conclusions: Maximizing MET dosage can improve glycemic control in persons with type 2 diabetes who have HbA1c values above 6.7% while taking less than 2000 mg of MET daily, and maximizing MET dosage produces a larger fall in HbA1c if the initial HbA1c is higher. Moreover, a decrease in MET dosage did not increase HbA1c. These findings support health policies aimed to improve and optimize use of metformin among persons with type 2 diabetes whose glycemic control is suboptimal. Disclosure W. Sivitz: None. L.S. Phillips: Other Relationship; Self; DIASYST Inc.. Research Support; Self; Amylin Pharmaceuticals, Eli Lilly and Company, Novo Nordisk Inc., Sanofi-Aventis, PhaseBio Pharmaceuticals, Inc., Roche Diabetes Care Health and Digital Solutions, AbbVie Inc., Vascular Pharmaceuticals, Inc., Janssen Pharmaceuticals, Inc., GlaxoSmithKline plc., Pfizer Inc.. Other Relationship; Self; Novartis Pharmaceuticals Corporation, Merck & Co., Inc.. S.P. Fortmann: None. D.J. Wexler: None. A.W. Camp: None. M. Tiktin: None. M. Perez: None. J.E. Craig: None. P. Hollander: Advisory Panel; Self; Novo Nordisk Inc., Eli Lilly and Company, Merck & Co., Inc. A. Cherrington: Advisory Panel; Self; AstraZeneca. Research Support; Self; Boehringer Ingelheim Pharmaceuticals, Inc.. Consultant; Self; Novo Nordisk Inc. V.R. Aroda: Consultant; Self; Novo Nordisk Inc.. Research Support; Self; Novo Nordisk Inc., AstraZeneca, Calibra Medical, Eisai Inc., Sanofi. Consultant; Self; Sanofi. Research Support; Self; Theracos, Inc.. Employee; Spouse/Partner; Merck & Co., Inc.. Other Relationship; Self; American Diabetes Association. Consultant; Self; ADOCIA. M. Tan: Other Relationship; Self; Eli Lilly and Company. J. Krakoff: None. N. Rasouli: Consultant; Self; AstraZeneca, Intarcia Therapeutics, Inc.. N. Younes: None. G. Research Group: Research Support; Self; National Institute of Diabetes and Digestive and Kidney Diseases, National Heart, Lung, and Blood Institute. Other Relationship; Self; Bristol-Myers Squibb Company, Merck & Co., Inc., Novo Nordisk Inc., Sanofi-Aventis, Roche Diagnostics Corporation, Becton, Dickinson and Company, Centers for Disease Control and Prevention, National Diabetes Education Program.
    Type of Medium: Online Resource
    ISSN: 0012-1797 , 1939-327X
    Language: English
    Publisher: American Diabetes Association
    Publication Date: 2018
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  • 10
    In: Bioelectromagnetics, Wiley, Vol. 22, No. 5 ( 2001-07), p. 316-322
    Abstract: Electrochemical treatment of cancer utilizes direct electric current (DEC) to produce direct alterations and chemical changes in tumors. However, the DEC treatment is not established and mechanisms are not well understood. In vivo studies were conducted to evaluate the effectiveness of DEC on animal tumor models. Ehrlich tumors were implanted subcutaneously in sixty male BALB/c mice. When the tumor volumes reached 850 mm 3 , four platinum electrodes were inserted into the tumors. DEC of 4 mA was applied for 21 min to the treated group; the total charge was 5 C. The healthy and sick control groups were subjected to the same conditions but without DEC. Hematological and chemical parameters as well as histopathological and peritumoral findings were studied. After the electrochemical therapy it was observed that both tumor volume decrease and necrosis percentage increase were significant in the treated group. Moreover, 24 h after treatment an acute inflammatory response, as well as sodium ion decrease, and potassium ion and spleen weight increase were observed in this group. It was concluded that both electrochemical reactions (fundamentally those in which reactive oxygen species are involved), and immune system stimulation induced by cytotoxic action of the DEC could constitute the most important antitumor mechanisms. Bioelectromagnetics 22:316–322, 2001. © 2001 Wiley‐Liss, Inc.
    Type of Medium: Online Resource
    ISSN: 0197-8462 , 1521-186X
    URL: Issue
    RVK:
    Language: English
    Publisher: Wiley
    Publication Date: 2001
    detail.hit.zdb_id: 2001228-7
    SSG: 12
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