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1.
Georgian Med News ; (336): 63-65, 2023 Mar.
Article in English | MEDLINE | ID: mdl-37166882

ABSTRACT

A comparative analysis of clinical and laboratory parameters was carried out in 49 children. The patients were divided into 3 groups depending on the type of insulin they received. Group 1 included 20 children who used Insulin human (Insulatard), group 2 included 15 children using insulin Glargine, and group 3 included 14 children using insulin Detemir. All children using Detemir and Glargine used short acting insulin Aspart. Those using Insulin human (Insulatard) used Human insulin (rDNA, Actrapid) in addition. In all children, blood glucose, glycohemoglobin and cholesterol were determined by laboratory methods. Statistical calculations were carried out using a statistical package at a confidence level of p<0.05. A significant difference was found between the mean values of glycohemoglobin and glucose of Glargine users and patients with using Insulin human (Insulatard) (p≺0.05). These indicators were lower in Glargine users. There is a positive correlation between doses of Regular insulin and Insulin human (Insulatard) with body weight and height. There is a positive correlation between dose of Detemir and body mass. However, no such relationship between Glargine, body mass and height was recorded. It was a negative correlation between its dose Glargine with glycohemoglobin and also between glucose and cholesterol using Glargine.


Subject(s)
Diabetes Mellitus, Type 1 , Hypoglycemic Agents , Humans , Child , Insulin Glargine/therapeutic use , Hypoglycemic Agents/therapeutic use , Glycated Hemoglobin , Isophane Insulin, Human , Insulin Detemir/therapeutic use , Insulin/therapeutic use , Diabetes Mellitus, Type 1/drug therapy , Blood Glucose/analysis , Glucose
2.
BMC Cancer ; 15: 846, 2015 Nov 04.
Article in English | MEDLINE | ID: mdl-26537234

ABSTRACT

BACKGROUND: Human insulin is commonly used to treat hyperglycemia in patients with diabetes, but its potential link with female breast cancer is under debate. This study investigated whether human insulin use might be associated with breast cancer risk in Taiwanese women with type 2 diabetes. METHODS: The reimbursement databases of all Taiwanese diabetic patients from 1996 to 2009 were retrieved from the National Health Insurance. An entry date was set at 1 January 2004 and a total of 482,033 women with type 2 diabetes were followed up for breast cancer incidence until the end of 2009. Incidences for ever-users, never-users and subgroups of human insulin exposure (using tertile cutoffs of time since starting insulin, cumulative dose and cumulative duration of insulin) were calculated and the adjusted hazard ratios were estimated by Cox regression. The potential risk modification by concomitant treatment with metformin, statin and angiotensin converting enzyme inhibitor/angiotensin receptor blocker (ACEI/ARB) was also evaluated. RESULTS: There were 59,798 ever-users and 422,235 never-users of human insulin, with respective numbers of incident breast cancer of 559 (0.93 %) and 4,711 (1.12 %), and respective incidence of 207.9 and 215.1 per 100,000 person-years. The overall adjusted hazard ratio (95 % confidence interval) did not show a significant association with insulin [1.033 (0.936-1.139)]. However, patients in the third tertiles of dose-response parameters might show a significantly higher risk of breast cancer while compared to never-users: 1.185 (1.026-1.368), 1.260 (1.096-1.450) and 1.257 (1.094-1.446) for ≥67 months for time since starting insulin, ≥39,000 units for cumulative dose of insulin, and ≥21.8 months for cumulative duration of insulin, respectively. Additional analyses suggested that the breast cancer risk associated with human insulin use might be beneficially modified by concomitant use of metformin, statin and ACEI/ARB. CONCLUSIONS: This study discloses a significantly higher risk of breast cancer associated with prolonged use of human insulin. The increased risk of breast cancer associated with human insulin use may be modified by medications such as metformin, statin and ACEI/ARB.


Subject(s)
Breast Neoplasms/chemically induced , Diabetes Mellitus, Type 2/drug therapy , Isophane Insulin, Human/adverse effects , Risk Assessment , Breast Neoplasms/epidemiology , Drug Administration Schedule , Female , Humans , Hypoglycemic Agents/administration & dosage , Hypoglycemic Agents/adverse effects , Incidence , Isophane Insulin, Human/administration & dosage , Middle Aged , Retrospective Studies , Risk Factors , Taiwan/epidemiology
3.
Diabetes Obes Metab ; 17(12): 1142-9, 2015 Dec.
Article in English | MEDLINE | ID: mdl-26172084

ABSTRACT

AIMS: To compare the efficacy and safety of new insulin glargine 300 U/ml (Gla-300) with insulin glargine 100 U/ml (Gla-100) over 12 months of treatment in people with type 2 diabetes using basal insulin and oral antihyperglycaemic drugs (OADs). METHODS: EDITION 2 (NCT01499095) was a randomized, 6-month, multicentre, open-label, two-arm, phase IIIa study investigating once-daily Gla-300 versus Gla-100, plus OADs (excluding sulphonylureas), with a 6-month safety extension. RESULTS: Similar numbers of participants in each group completed 12 months of treatment [Gla-300, 315 participants (78%); Gla-100, 314 participants (77%)]. The reduction in glycated haemoglobin was maintained for 12 months with both treatments: least squares (LS) mean (standard error) change from baseline -0.55 (0.06)% for Gla-300 and -0.50 (0.06)% for Gla-100; LS mean difference -0.06 [95% confidence interval (CI) -0.22 to 0.10)%]. A significant relative reduction of 37% in the annualized rate of nocturnal confirmed [≤3.9 mmol/l (≤70 mg/dl)] or severe hypoglycaemia was observed with Gla-300 compared with Gla-100: rate ratio 0.63 [(95% CI 0.42-0.96); p = 0.031], and fewer participants experienced ≥1 event [relative risk 0.84 (95% CI 0.71-0.99)]. Severe hypoglycaemia was infrequent. Weight gain was significantly lower with Gla-300 than Gla-100 [LS mean difference -0.7 (95% CI -1.3 to -0.2) kg; p = 0.009]. Both treatments were well tolerated with a similar pattern of adverse events (incidence of 69 and 60% in the Gla-300 and Gla-100 groups). CONCLUSIONS: In people with type 2 diabetes treated with Gla-300 or Gla-100, and non-sulphonylurea OADs, glycaemic control was sustained over 12 months, with less nocturnal hypoglycaemia in the Gla-300 group.


Subject(s)
Diabetes Mellitus, Type 2/drug therapy , Hyperglycemia/prevention & control , Hypoglycemia/prevention & control , Hypoglycemic Agents/adverse effects , Insulin Glargine/adverse effects , Administration, Oral , Blood Glucose Self-Monitoring , Diabetes Mellitus, Type 2/blood , Drug Compounding , Drug Therapy, Combination , Glycated Hemoglobin/analysis , Humans , Hyperglycemia/chemically induced , Hyperglycemia/epidemiology , Hypoglycemia/epidemiology , Hypoglycemic Agents/administration & dosage , Hypoglycemic Agents/therapeutic use , Incidence , Injections, Subcutaneous , Insulin Glargine/administration & dosage , Insulin Glargine/therapeutic use , Intention to Treat Analysis , Isophane Insulin, Human/administration & dosage , Isophane Insulin, Human/adverse effects , Isophane Insulin, Human/therapeutic use , Middle Aged , Patient Dropouts , Patient Satisfaction , Risk , Weight Gain/drug effects
5.
Pak J Pharm Sci ; 28(3): 875-9, 2015 May.
Article in English | MEDLINE | ID: mdl-26004720

ABSTRACT

A simple and expeditious analytical method for determination of zinc in human insulin isophane suspension by flame atomic absorption spectrophotometer (FAAS) was validated. The method was carried out on atomic absorption spectrometer with 0.4 nm bandwidth, 1.0 filter factor on deuterium (D2) background correction. The integration time was set at 3.0 second with 5.0 mA lamp current. The parameters of method validation showed adequate linearity, efficiency and relative standard deviation values were between 0.64%-1.69% (n=7), 1.31%-1.58% (n=10) for repeatability and intermediate precision respectively. The limit of detection 0.0032 µg/mL, 0.0173 µg/mL, 0.0231 µg/mL and limit of quantitation 0.0107µg/mL, 0.0578 µg/mL, 0.0694 µg/mL based on signal to noise (SN), calibration curve method (CCM) and fortification of blank (FB) were obtained respectively. The percentages of recovery for low, medium and high spiked concentration levels of zinc in human insulin were 99.38 ± 0.04 to 100.3 ± 0.03, 98.45 ± 0.38 to 100.3 ± 0.07 and 99.42 ± 0.03 to 99.42 ± 0.08 respectively. With the use of this method, five samples from each vial of human insulin isophane suspension were analyzed and the zinc content was determined. The zinc content were 22.1 ± 0.025 µg/mL and 24.3 ± 0.028 µg/mL which compliance the British Pharmacopoeia standard.


Subject(s)
Insulin, Isophane/chemistry , Insulin, Regular, Human/chemistry , Limit of Detection , Spectrophotometry, Atomic/methods , Zinc/analysis , Humans , Isophane Insulin, Human , Reproducibility of Results
6.
Diabetes Obes Metab ; 15(11): 978-86, 2013 Nov.
Article in English | MEDLINE | ID: mdl-23551900

ABSTRACT

The aim of this review is to summarize the clinical efficacy, tolerability and safety data of insulin detemir, and compare its use with that of neutral protamine Hagedorn (NPH) insulin in randomized controlled trials in people with type 1 or type 2 diabetes. A literature search was conducted with PubMed using predefined search terms. Studies were included if they met the following criteria: randomized, controlled trial, comparison of insulin detemir with NPH insulin, non-hospitalized adults aged ≥18 years with either type 1 or type 2 diabetes, and study duration of ≥12 weeks. The following types of studies were excluded: non-randomized controlled trials, studies of mixed cohorts of patients with type 1 or type 2 diabetes that did not report results separately, pharmacokinetic/pharmacodynamic studies, reviews, pooled or meta-analyses or health-economic analyses. Fourteen publications met the inclusion criteria. Nine studies in people with type 1 diabetes and three studies in people with type 2 diabetes, using insulin detemir in a basal-bolus regimen were included. Two studies were in people with type 2 diabetes using insulin detemir with oral antidiabetes medicines. In 14 studies of people with type 1 or type 2 diabetes, insulin detemir treatment provided similar or better glycaemic control, lower within-subject variability, similar or lower frequency of hypoglycaemia and less weight gain when compared with NPH insulin.


Subject(s)
Diabetes Mellitus, Type 1/drug therapy , Diabetes Mellitus, Type 2/drug therapy , Hypoglycemic Agents/therapeutic use , Insulin, Isophane/therapeutic use , Insulin, Long-Acting/therapeutic use , Insulin, Regular, Human/therapeutic use , Adult , Diabetes Mellitus, Type 1/blood , Diabetes Mellitus, Type 2/blood , Drug Therapy, Combination , Humans , Hyperglycemia/prevention & control , Hypoglycemia/prevention & control , Hypoglycemic Agents/adverse effects , Insulin Detemir , Insulin, Isophane/adverse effects , Insulin, Long-Acting/adverse effects , Insulin, Regular, Human/adverse effects , Isophane Insulin, Human , Randomized Controlled Trials as Topic , Weight Gain/drug effects
7.
Pediatr Diabetes ; 14(4): 299-303, 2013 Jun.
Article in English | MEDLINE | ID: mdl-23350652

ABSTRACT

We report a rare case of permanent neonatal diabetes (PND) due to insulin (INS) gene mutation in a 51-month-old girl who presented with hyperglycemia in the neonatal period. Mutational analysis of KCNJ11 and INS was performed and this detected a novel heterozygous c.38T>G (p.Leu13Arg) INS de novo mutation. The non-conservative change substitutes the highly conserved L(13) residue within the hydrophobic core region of the preproinsulin signal peptide. Given the frequent tendency of heterozygous INS mutations to exhibit dominant negative disease pathogenesis, it is likely that the mutant preproinsulin perturbed the non-mutant counterpart progression and processing within the ß-cells, and this resulted to a permanent form of congenital diabetes.


Subject(s)
Diabetes Mellitus, Type 1/congenital , Infant, Newborn, Diseases/genetics , Insulin/genetics , Child, Preschool , Diabetes Mellitus, Type 1/genetics , Female , Humans , Infant, Newborn , Insulin, Isophane/administration & dosage , Insulin, Regular, Human/administration & dosage , Isophane Insulin, Human , Potassium Channels, Inwardly Rectifying/genetics , Protein Precursors/genetics , Protein Sorting Signals/genetics
8.
Pediatr Diabetes ; 14(3): 211-6, 2013 May.
Article in English | MEDLINE | ID: mdl-23350587

ABSTRACT

OBJECTIVE: There are an estimated 1000 children with diabetes in Tanzania. Recently, the first two pediatric endocrinologists, trained in the European Society for Paediatric Endocrinology (ESPE)/International Society for Paediatric and Adolescent Diabetes (ISPAD) program in Nairobi, Kenya, entered practice. The purpose of this study was to prospectively assess the impact of a 6-month diabetes management and education program on glycemic control and acute complications in children and adolescents in Tanzania. RESEARCH DESIGN AND METHODS: Eighty-one patients aged 3-19 yr were enrolled. All were on split-dose Insulatard (Neutral Protamine Hagedorn) and Actrapid (soluble, regular) insulin, and were given three glucose test strips per week. Children were seen in clinic an average of six times over 6 months and received 3 h of diabetes education. A structured questionnaire evaluated social demographic data and acute complications. RESULTS: Despite regular clinic attendance, diabetes education, and provision of insulin, hemoglobin A1c (HbA1c) levels did not improve. Four children (5%) had HbA1c 7.5%, 22 (28%) HbA1c 7.5-10%, 9 (24%) HbA1c 11-12.5%, and 36 (44%) HbA1c >12.5%. There was a substantial reduction in severe hypoglycemia, with 17% of subjects experiencing this acute complication compared to 52% in the 6 months prior to study enrolment. Six children were admitted in diabetic ketoacidosis during the study compared to three during the previous 6 months. Twenty-six children (36%) reported missing >6 doses of insulin (but only two lacked insulin). CONCLUSIONS: Diabetes education significantly reduced the risk of severe hypoglycemia, but better glycemic control of diabetes was not attained. Further study is needed to explore factors to improve glycemic control including increased testing, or perhaps different insulin regimens.


Subject(s)
Diabetes Mellitus, Type 1/therapy , Diabetic Ketoacidosis/prevention & control , Hyperglycemia/prevention & control , Hypoglycemia/prevention & control , Adolescent , Child , Child, Preschool , Cohort Studies , Diabetes Mellitus, Type 1/blood , Diabetes Mellitus, Type 1/complications , Diabetes Mellitus, Type 1/drug therapy , Diabetic Ketoacidosis/epidemiology , Drug Therapy, Combination , Family , Female , Humans , Hyperglycemia/epidemiology , Hypoglycemia/epidemiology , Hypoglycemic Agents/administration & dosage , Hypoglycemic Agents/adverse effects , Hypoglycemic Agents/therapeutic use , Incidence , Insulin, Isophane/administration & dosage , Insulin, Isophane/adverse effects , Insulin, Isophane/therapeutic use , Insulin, Regular, Human/administration & dosage , Insulin, Regular, Human/adverse effects , Insulin, Regular, Human/therapeutic use , Insulin, Regular, Pork/administration & dosage , Insulin, Regular, Pork/adverse effects , Insulin, Regular, Pork/therapeutic use , Isophane Insulin, Human , Male , Medication Adherence , Outpatient Clinics, Hospital , Patient Education as Topic , Prospective Studies , Tanzania/epidemiology
9.
J Dairy Sci ; 96(12): 7565-77, 2013.
Article in English | MEDLINE | ID: mdl-24119807

ABSTRACT

This study investigated the effect of 2 different types of long-acting insulin on milk production, milk composition, and metabolism in lactating dairy cows. Multiparous cows (n=30) averaging 88 d in milk were assigned to one of 3 treatments in a completely randomized design. Treatments consisted of control (C), Humulin-N (H; Eli Lilly and Company, Indianapolis, IN), and insulin glargine (L). The H and L treatments were administered twice daily at 12-h intervals via subcutaneous injection for 10d. Cows were milked twice daily, and milk composition was determined every other day. Mammary biopsies were conducted on d 11, and mammary proteins extracted from the biopsies were analyzed by Western blot for components of insulin and mammalian target of rapamycin signaling pathways. Treatment had no effect on dry matter intake or milk yield. Treatment with both forms of long-acting insulin increased milk protein content and tended to increase milk protein yield over the 10-d treatment period. Analysis of milk N fractions from samples collected on d 10 of treatment suggested that cows administered L tended to have higher yields of milk protein fractions than cows administered H. Milk fat content and yield tended to be increased for cows administered long-acting insulins. Lactose content and yields were decreased by treatment with long-acting insulins. Administration of long-acting insulins, particularly L, tended to shift milk fatty acid composition toward increased short- and medium-chain fatty acids and decreased long-chain fatty acids. Plasma concentrations of glucose and urea N were lower for cows administered long-acting insulins; interactions of treatment and sampling time were indicative of more pronounced effects of L than H on these metabolites. Concentrations of nonesterified fatty acids and insulin were increased in cows administered long-acting insulins. Decreased concentrations of urea N in both plasma and milk suggested more efficient use of N in cows administered long-acting insulins. Western blot analysis of mammary tissue collected by biopsy indicated that the ratios of phosphorylated protein kinase b (Akt) to total Akt and phosphorylated ribosomal protein S6 (rpS6) to total rpS6 were not affected by long-acting insulins. Modestly elevating insulin activity in lactating dairy cows using long-acting insulins altered milk composition and metabolism. Future research should explore mechanisms by which either insulin concentrations or insulin signaling pathways in the mammary gland can be altered to enhance milk fat and protein production.


Subject(s)
Cattle/metabolism , Insulin, Isophane/pharmacology , Insulin, Long-Acting/pharmacology , Insulin, Regular, Human/pharmacology , Milk/chemistry , Milk/drug effects , Milk/standards , Animals , Blood Glucose , Blood Urea Nitrogen , Blotting, Western/veterinary , Fatty Acids, Nonesterified/analysis , Female , Injections, Subcutaneous/veterinary , Insulin/analysis , Insulin Glargine , Insulin, Isophane/administration & dosage , Insulin, Long-Acting/administration & dosage , Insulin, Regular, Human/administration & dosage , Isophane Insulin, Human
10.
Diabetologia ; 55(1): 46-50, 2012 Jan.
Article in English | MEDLINE | ID: mdl-22002075

ABSTRACT

AIMS/HYPOTHESIS: In type 2 diabetic patients, insulin detemir (B29Lys(ε-tetradecanoyl),desB30 human insulin) induces less weight gain than NPH insulin. Due to the proposed reduction of tubular action by insulin detemir, type 2 diabetic patients should have increased urinary sodium excretion, thereby reducing extracellular volume and body weight when changed from NPH insulin to insulin detemir. METHODS: In a randomised, open-labelled, two-way crossover study of 24 patients with type 2 diabetes, patients were first treated with NPH insulin or insulin detemir for 8 weeks. Thereafter, they were changed to the other insulin for 8 weeks. In a third 1 week period, they were changed back to the first insulin. RESULTS: At the end of 8 weeks, body weight was reduced by 0.8 ± 0.2 kg (mean ± SEM) on insulin detemir compared with NPH insulin (p < 0.01). After insulin detemir treatment, we also observed a significant reduction of lean body mass (0.8 ± 0.2 kg, p < 0.05) and a non-significant reduction of extracellular volume (0.8 ± 0.5 l/1.73 m², p = 0.14). The weight loss occurred after as early as 1 week (0.8 ± 0.2 kg, p < 0.001), with a simultaneous and transient increase of urinary sodium excretion (p = 0.07). CONCLUSIONS/INTERPRETATION: Insulin detemir induces significant and sustained weight loss, which is first observed at 1 week after changing from NPH insulin. The initial weight loss seems to be related to changes in fluid volume and may reflect changed insulin action in the kidneys.


Subject(s)
Diabetes Mellitus, Type 2/drug therapy , Hypoglycemic Agents/adverse effects , Insulin, Isophane/adverse effects , Insulin, Long-Acting/adverse effects , Insulin, Regular, Human/adverse effects , Sodium/urine , Water-Electrolyte Balance/drug effects , Weight Loss/drug effects , Aged , Body Composition/drug effects , Cross-Over Studies , Diabetes Mellitus, Type 2/metabolism , Diabetes Mellitus, Type 2/urine , Extracellular Fluid/drug effects , Fluid Shifts/drug effects , Glomerular Filtration Rate/drug effects , Humans , Hypoglycemic Agents/therapeutic use , Insulin Detemir , Insulin, Isophane/therapeutic use , Insulin, Long-Acting/therapeutic use , Insulin, Regular, Human/therapeutic use , Isophane Insulin, Human , Middle Aged , Outpatient Clinics, Hospital , Patient Dropouts , Sodium/metabolism , Time Factors
11.
Endocr J ; 59(1): 81-90, 2012.
Article in English | MEDLINE | ID: mdl-22068113

ABSTRACT

In this rodent study, we compared the effects of early versus late intensive insulin therapy on diabetic nephropathy and potential causal mechanisms. Diabetes was induced in rats by high-fat diet and low-dose streptozotocin. Intensive insulin therapy was initiated in the early intensive insulin therapy groups as soon as diabetes was confirmed and lasted for 8 (8wEI group) and 16 weeks (16wEI group). In the late insulin therapy group (LI group), intensive insulin treatment was initiated 8 weeks later and lasted for 8 weeks. Age-matched diabetic rats (8wDM group and 16wDM group) and non-diabetic rats (8wNC group and 16wNC group) served as controls. Histological analysis, real-time PCR, and western blot were performed in renal cortex specimens. Glomerular hypertrophy and mesangial matrix expansion were prominent in the 16wDM and LI groups while the EI groups remained normal and similar to the 16wNC group. Western blots revealed that p38 MAPK activities in the EI groups decreased significantly, whereas the level in the LI group was markedly higher than the 16wEI group, and not different from the DM groups. Activities of MKK3/6, CREB and MKP-1 proteins as well as CREB and MKP-1 mRNA showed a similar pattern. Therefore, we concluded that early intensive insulin treatment and attainment of good glycemic control counteracted some renal molecular pathways associated with epigenetic metabolic memory to minimize risk of diabetic nephropathy. However, late insulin therapy did not abrogate the increased renal cortical p38 MAPK pathway activation in diabetic rats and led to glomerular hypertrophy and extracellular matrix expansion.


Subject(s)
Diabetes Mellitus, Type 2/drug therapy , Diabetic Nephropathies/prevention & control , Hypoglycemic Agents/therapeutic use , Insulin, Isophane/therapeutic use , Insulin, Regular, Human/therapeutic use , Kidney Cortex/drug effects , MAP Kinase Signaling System/drug effects , p38 Mitogen-Activated Protein Kinases/metabolism , Animals , Diabetes Mellitus, Type 2/complications , Diabetes Mellitus, Type 2/metabolism , Diabetes Mellitus, Type 2/pathology , Gene Expression Regulation/drug effects , Glomerular Mesangium/drug effects , Glomerular Mesangium/pathology , Humans , Hypertrophy , Isophane Insulin, Human , Kidney Cortex/metabolism , Kidney Cortex/pathology , Kidney Glomerulus/drug effects , Kidney Glomerulus/pathology , Male , Phosphorylation/drug effects , Protein Processing, Post-Translational/drug effects , RNA, Messenger/metabolism , Random Allocation , Rats , Rats, Sprague-Dawley , Time Factors , p38 Mitogen-Activated Protein Kinases/antagonists & inhibitors
12.
J Dairy Sci ; 95(12): 6974-82, 2012 Dec.
Article in English | MEDLINE | ID: mdl-23084884

ABSTRACT

Two experiments were conducted to investigate effects of administering increasing doses of 2 different preparations of long-acting insulin on the 24-h profiles of plasma glucose and insulin concentrations in mid lactation dairy cows. The 2 separately analyzed experiments investigated the effects administering either Humulin N (H), a neutral protamine Hagedorn insulin, or insulin glargine (Lantus, L), an insulin analog, at doses of 0 (control), 0.1, 0.2, and 0.4 IU/kg of body weight in a randomized complete block design. Sixteen cows (237±11 d in milk for H; 213±10 d in milk for L; mean ± SD) were used for each insulin preparation, resulting in n=4 for each dose within insulin preparation. Cows were fitted with a single jugular catheter on the day before the study. On the day of the study, cows were given treatments by subcutaneous injection of either sterile water or the designated insulin type and dose. Blood samples were taken hourly from the jugular catheter. Subcutaneous injection of both H and L resulted in linear decreases in plasma glucose concentrations, increased area under the curve, and decreased nadir for plasma glucose following administration of the insulin preparations. Plasma insulin concentration linearly increased with increasing dose of H. Though elevated concentrations of insulin were measurable in cows treated with H, they were not measurable in cows treated with L. Attempts to measure overall insulin concentrations and metabolites of L by a commercially available ELISA and a commercially available RIA kit were not successful and did not retrieve values that we felt truly represented the amount of insulin activity exhibited during this treatment. Both long-acting insulin preparations elicited insulin-like activity in lactating dairy cows, as evidenced by reduced plasma glucose concentrations. Given these results, the potential exists to use both H and L to study the effects of insulin in mid lactation dairy cows without the confounding effect of severe hypoglycemia (<20 mg/dL) or concurrent provision of glucose during treatment.


Subject(s)
Blood Glucose/analysis , Cattle/physiology , Insulin, Long-Acting/administration & dosage , Animals , Cattle/blood , Dose-Response Relationship, Drug , Female , Injections, Subcutaneous/veterinary , Insulin Glargine , Insulin, Isophane/administration & dosage , Insulin, Isophane/blood , Insulin, Isophane/pharmacology , Insulin, Long-Acting/blood , Insulin, Long-Acting/pharmacology , Insulin, Regular, Human/administration & dosage , Insulin, Regular, Human/blood , Insulin, Regular, Human/pharmacology , Isophane Insulin, Human , Lactation/blood , Lactation/physiology
13.
Diabetes ; 71(11): 2237-2250, 2022 11 01.
Article in English | MEDLINE | ID: mdl-36265014

ABSTRACT

Exercise profoundly influences glycemic control by enhancing muscle insulin sensitivity, thus promoting glucometabolic health. While prior glycogen breakdown so far has been deemed integral for muscle insulin sensitivity to be potentiated by exercise, the mechanisms underlying this phenomenon remain enigmatic. We have combined original data from 13 of our studies that investigated insulin action in skeletal muscle either under rested conditions or following a bout of one-legged knee extensor exercise in healthy young male individuals (n = 106). Insulin-stimulated glucose uptake was potentiated and occurred substantially faster in the prior contracted muscles. In this otherwise homogenous group of individuals, a remarkable biological diversity in the glucometabolic responses to insulin is apparent both in skeletal muscle and at the whole-body level. In contrast to the prevailing concept, our analyses reveal that insulin-stimulated muscle glucose uptake and the potentiation thereof by exercise are not associated with muscle glycogen synthase activity, muscle glycogen content, or degree of glycogen utilization during the preceding exercise bout. Our data further suggest that the phenomenon of improved insulin sensitivity in prior contracted muscle is not regulated in a homeostatic feedback manner from glycogen. Instead, we put forward the idea that this phenomenon is regulated by cellular allostatic mechanisms that elevate the muscle glycogen storage set point and enhance insulin sensitivity to promote the uptake of glucose toward faster glycogen resynthesis without development of glucose overload/toxicity or feedback inhibition.


Subject(s)
Insulin Resistance , Insulin , Humans , Male , Insulin/metabolism , Glycogen/metabolism , Glycogen Synthase/metabolism , Insulin Resistance/physiology , Isophane Insulin, Human , Muscle, Skeletal/metabolism , Glucose/metabolism , Insulin, Regular, Human
14.
Appl Physiol Nutr Metab ; 47(10): 992-1004, 2022 Oct 01.
Article in English | MEDLINE | ID: mdl-35816737

ABSTRACT

Effective storage of excess energy in abdominal subcutaneous adipose tissue during periods of overeating may help attenuate weight-gain-related insulin resistance. The objective of this study was to assess changes in the expression of factors regulating abdominal subcutaneous adipose tissue storage capacity in response to a brief exposure to overeating in nonobese adults. Because exercise can alter the expression of genes involved in regulating adipose tissue storage capacity, we compared the responses to overeating in regular exercisers (EX, n = 11) and nonexercisers (nonEX, n = 11). Abdominal subcutaneous adipose tissue samples and oral glucose tolerance tests were performed before and after participants ate 30% above their estimated daily energy requirements for 1 week. Both EX and nonEX gained ∼1 kg (P < 0.01), and Matsuda insulin sensitivity index was reduced ∼15% (P = 0.04) in both groups. Gene expression of factors involved in lipid metabolism (HSL, ATGL, DGAT, and PPARγ) and angiogenesis (HIF1α and KDR) were increased (P < 0.05), with no differences observed between EX and nonEX. In contrast, protein abundance of these factors did not change. The modest overeating stimulus did not increase markers of inflammation in the systemic circulation or adipose tissue. Overall, our findings indicate that a brief and modest overeating stimulus can impair insulin sensitivity and upregulate genes involved in abdominal adipose tissue storage capacity similarly in exercisers and nonexercisers. ClinicalTrials.gov ID#: NCT02701738.


Subject(s)
Insulin Resistance , Adipose Tissue/metabolism , Adult , Gene Expression , Humans , Hyperphagia/genetics , Insulin Resistance/physiology , Isophane Insulin, Human , PPAR gamma/metabolism , Subcutaneous Fat/metabolism , Subcutaneous Fat, Abdominal
15.
Endocrinology ; 163(11)2022 10 11.
Article in English | MEDLINE | ID: mdl-36036084

ABSTRACT

Adipose tissue secretions are depot-specific and vary based on anatomical location. Considerable attention has been focused on visceral (VAT) and subcutaneous (SAT) adipose tissue with regard to metabolic disease, yet our knowledge of the secretome from these depots is incomplete. We conducted a comprehensive analysis of VAT and SAT secretomes in the context of metabolic function. Conditioned media generated using SAT and VAT explants from individuals with obesity were analyzed using proteomics, mass spectrometry, and multiplex assays. Conditioned media were administered in vitro to rat hepatocytes and myotubes to assess the functional impact of adipose tissue signaling on insulin responsiveness. VAT secreted more cytokines (IL-12p70, IL-13, TNF-α, IL-6, and IL-8), adipokines (matrix metalloproteinase-1, PAI-1), and prostanoids (TBX2, PGE2) compared with SAT. Secretome proteomics revealed differences in immune/inflammatory response and extracellular matrix components. In vitro, VAT-conditioned media decreased hepatocyte and myotube insulin sensitivity, hepatocyte glucose handling, and increased basal activation of inflammatory signaling in myotubes compared with SAT. Depot-specific differences in adipose tissue secretome composition alter paracrine and endocrine signaling. The unique secretome of VAT has distinct and negative impact on hepatocyte and muscle insulin action.


Subject(s)
Insulin Resistance , Intra-Abdominal Fat , Adipokines/metabolism , Animals , Culture Media, Conditioned/metabolism , Culture Media, Conditioned/pharmacology , Dinoprostone/metabolism , Glucose/metabolism , Humans , Insulin Resistance/physiology , Interleukin-13/metabolism , Interleukin-6/metabolism , Interleukin-8 , Intra-Abdominal Fat/metabolism , Isophane Insulin, Human , Matrix Metalloproteinase 1/metabolism , Obesity/metabolism , Plasminogen Activator Inhibitor 1/metabolism , Rats , Secretome , Subcutaneous Fat/metabolism , Tumor Necrosis Factor-alpha/metabolism
16.
Plast Reconstr Surg ; 141(4): 476e-485e, 2018 04.
Article in English | MEDLINE | ID: mdl-29240641

ABSTRACT

BACKGROUND: The role of insulin in expediting wound healing is firmly established within the context of major trauma and burns; however, only limited clinical evidence exists as to its effects on scar formation. This study aims to build on previous laboratory work to examine the potential antiscarring properties of insulin in a clinical environment. METHODS: Ninety-one patients undergoing bilateral aesthetic breast operations were recruited to receive low-dose insulin and placebo injections to the medial 3 cm of their submammary incisions within the context of a randomized, intrapatient, placebo-controlled trial, and scar quality was assessed at 3-, 6-, and 12-month reviews using the Manchester Scar Scale. RESULTS: Across the cohort at 12-month review, the insulin-treated scars had lower scar scores (p = 0.055) compared with placebo. Subgroup analysis of individuals with heavier scars showed that median scar scores were significantly lower for the insulin-treated scars with regard to both scar contour (p = 0.048) and scar distortion (p = 0.045). CONCLUSIONS: Subcutaneous insulin injections reduced the appearance of scarring in this study compared with placebo. The greatest effect was seen in those participants who showed heavier scars and, as such, insulin has a role as an antiscarring therapy in individuals likely to be affected by heavier scarring. Further research is required to more precisely delineate which subjects may benefit most from this treatment. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, II.


Subject(s)
Cicatrix/prevention & control , Hypoglycemic Agents/therapeutic use , Isophane Insulin, Human/therapeutic use , Mammaplasty , Postoperative Care/methods , Postoperative Complications/prevention & control , Adolescent , Adult , Cicatrix/diagnosis , Cicatrix/etiology , Dose-Response Relationship, Drug , Double-Blind Method , Female , Follow-Up Studies , Humans , Injections, Subcutaneous , Middle Aged , Postoperative Complications/diagnosis , Treatment Outcome , Young Adult
17.
Arch Physiol Biochem ; 124(4): 361-366, 2018 Oct.
Article in English | MEDLINE | ID: mdl-29207888

ABSTRACT

Present study was conducted to evaluate the effect of oral supplementation of composite extract of leaves (CLE) of four medicinal plants; Aegle marmelos, Ocimum sanctum, Murraya koenigii and Azadirachta indica on markers of oxidative stress in brain tissues of alloxan-induced diabetic rats in vivo. Enhanced lipid peroxidation, protein oxidation and reduced antioxidative defence systems were measured in brain tissues of diabetic rats. Supplementation of CLE, once in a day for 35 days significantly (p < .05) protected the peroxidation of lipid, oxidation of protein and ameliorated the antioxidant defence in brain tissue of diabetic rats. It was observed that the insulin-like effect of CLE was dose dependent; higher effect at higher doses. The results of the study suggest that supplementation CLE may provide an overall homeostasis and significant neuro-protection through rescuing brain cells from oxidative abuse and accelerating brain antioxidative defence during advanced stage of hyperglycaemia.


Subject(s)
Antioxidants/therapeutic use , Diabetes Mellitus, Experimental/diet therapy , Dietary Supplements , Oxidative Stress , Plant Extracts/therapeutic use , Plant Leaves/chemistry , Plants, Medicinal/chemistry , Animals , Antioxidants/administration & dosage , Biomarkers/blood , Biomarkers/metabolism , Brain/drug effects , Brain/enzymology , Brain/metabolism , Diabetes Mellitus, Experimental/blood , Diabetes Mellitus, Experimental/drug therapy , Diabetes Mellitus, Experimental/metabolism , Hyperglycemia/prevention & control , Hypoglycemic Agents/administration & dosage , Hypoglycemic Agents/therapeutic use , India , Isophane Insulin, Human/therapeutic use , Lipid Peroxidation/drug effects , Male , Nerve Tissue Proteins/chemistry , Nerve Tissue Proteins/metabolism , Neurons/drug effects , Neurons/enzymology , Neurons/metabolism , Neuroprotective Agents/administration & dosage , Neuroprotective Agents/therapeutic use , Oxidation-Reduction , Oxidative Stress/drug effects , Oxidoreductases/metabolism , Plant Extracts/administration & dosage , Plant Leaves/growth & development , Plants, Medicinal/growth & development , Rats, Wistar
19.
Arch Endocrinol Metab ; 60(1): 47-53, 2016 Feb.
Article in English | MEDLINE | ID: mdl-26909482

ABSTRACT

OBJECTIVE: To compare the effects of the neutral protamine Hagedorn (NPH) recombinant human insulin formulations Gansulin and Humulin N® on the glycemic control of patients with type 2 diabetes mellitus (T2DM). SUBJECTS AND METHODS: Prospective, double-blind, randomized, parallel, single-center study of 37 individuals with T2DM treated with NPH insulin formulations. The Tukey-Kramer test for multiple comparisons, the Wilcoxon paired comparison test and the Chi-Square test were used for the statistical analyses. The significance level was set at 5% (p < 0.05). RESULTS: The NPH insulin formulations Humulin and Gansulin similarly reduced the HbA1c levels observed at the end of the study compared with the values obtained at the beginning of the study. In the Humulin group, the initial HbA1c value of 7.91% was reduced to 6.56% (p < 0.001), whereas in the Gansulin group, the reduction was from 8.18% to 6.65% (p < 0.001). At the end of the study, there was no significant difference between the levels of glycated hemoglobin (p = 0.2410), fasting plasma glucose (FG; p = 0.9257) and bedtime plasma glucose (BG; p = 0.3906) between the two insulin formulations. There was no nt difference in the number of hypoglycemic events between the two insulin formulations, and no severe hyp episodes were recorded. CONCLUSION: This study demonstrated similar glycemic control by NPH insulin Gansulin compared with human insulin Humulin N® in patients with T2DM.


Subject(s)
Diabetes Mellitus, Type 2/drug therapy , Hypoglycemic Agents/therapeutic use , Isophane Insulin, Human/therapeutic use , Adult , Blood Glucose/analysis , Chemistry, Pharmaceutical , Double-Blind Method , Female , Glycated Hemoglobin/analysis , Humans , Hypoglycemia/chemically induced , Hypoglycemic Agents/economics , Insulin, Regular, Human/therapeutic use , Isophane Insulin, Human/economics , Male , Middle Aged , Prospective Studies , Recombinant Fusion Proteins , Statistics, Nonparametric , Treatment Outcome
20.
Neurosurgery ; 78(4): 487-91, 2016 Apr.
Article in English | MEDLINE | ID: mdl-26606669

ABSTRACT

BACKGROUND: The value of neuron-specific enolase (NSE) in predicting clinical outcomes has been investigated in a variety of neurological disorders. OBJECTIVE: To investigate the associations of serum NSE with severity of bleeding and functional outcomes in patients with subarachnoid hemorrhage (SAH). METHODS: We retrospectively reviewed the records of patients with SAH from June 2008 to June 2012. The severity of SAH bleeding at admission was measured radiographically with the Fisher scale and clinically with the Glasgow Coma Scale, Hunt and Hess grade, and World Federation of Neurologic Surgeons scale. Outcomes were assessed with the modified Rankin Scale at discharge. RESULTS: We identified 309 patients with nontraumatic SAH, and 71 had NSE testing. Median age was 54 years (range, 23-87 years), and 44% were male. In multivariable analysis, increased NSE was associated with a poorer Hunt and Hess grade (P = .003), World Federation of Neurologic Surgeons scale score (P < .001), and Glasgow Coma Scale score (P = .003) and worse outcomes (modified Rankin Scale at discharge; P = .001). There was no significant association between NSE level and Fisher grade (P = .81) in multivariable analysis. CONCLUSION: We found a significant association between higher NSE levels and poorer clinical presentations and worse outcomes. Although it is still early for any relevant clinical conclusions, our results suggest that NSE holds promise as a tool for screening patients at increased risk of poor outcomes after SAH.


Subject(s)
Hemorrhage/blood , Phosphopyruvate Hydratase/blood , Subarachnoid Hemorrhage/blood , Subarachnoid Hemorrhage/therapy , Adult , Aged , Aged, 80 and over , Female , Glasgow Coma Scale , Humans , Isophane Insulin, Human , Male , Middle Aged , Predictive Value of Tests , Prognosis , Retrospective Studies , Subarachnoid Hemorrhage/enzymology , Treatment Outcome , Young Adult
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