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Glucose reabsorption

Andrew Best, Jason M Kamilar
Sweating is an unusual thermoregulatory strategy for most mammals, yet is critical for humans. This trait is commonly hypothesized to result from human ancestors moving from a forest to a warmer and drier open environment. As soft tissue traits do not typically fossilize, this idea has been difficult to test. Therefore, we used a comparative approach to examine 15 eccrine gland traits from 35 primate species. For each trait we measured phylogenetic signal, tested three evolutionary models to explain trait variation, and used phylogenetic models to examine how traits varied in response to climate variables...
April 2018: Journal of Human Evolution
Milton Packer
Three classes of anti-hyperglycaemic medications are distinguished by their urinary sodium excretion-enhancing and blood pressure-lowering actions: long-acting glucagon-like peptide-1 receptor agonists, dipeptidyl peptidase-4 inhibitors and sodium-glucose co-transporter-2 inhibitors. Yet, these drugs exert different effects on macrovascular risk. Glucagon-like peptide-1 receptor agonists reduce atherosclerotic thromboembolic events, but have little effect on heart failure; sodium-glucose co-transporter-2 inhibitors decrease the occurrence of heart failure, but have minimal effect on myocardial infarction and stroke; and dipeptidyl peptidase-4 inhibitors do not ameliorate either atherosclerotic thromboembolic events or heart failure...
March 12, 2018: Diabetic Medicine: a Journal of the British Diabetic Association
Hiroko Hashimoto, Naohiro Nomura, Wakana Shoda, Kiyoshi Isobe, Hiroaki Kikuchi, Kouhei Yamamoto, Takuya Fujimaru, Fumiaki Ando, Takayasu Mori, Tomokazu Okado, Tatemitsu Rai, Shinichi Uchida, Eisei Sohara
OBJECTIVE: Metformin is an antidiabetic drug that is widely used to treat patients with diabetes mellitus. Recent studies have reported that treatment with metformin not only improved blood glucose levels but also reduced blood pressure. However, it remains unclear how metformin reduces blood pressure. We hypothesized that metformin affects sodium reabsorption in the kidneys. METHODS: Urinary sodium excretion and expression of renal sodium transporters were examined in 8-week-old male C57BL/6 mice with acute and chronic treatment of metformin...
March 3, 2018: Metabolism: Clinical and Experimental
Marie Ito, Tetsuhiro Tanaka
Sodium-glucose cotransporter 2 (SGLT2), which is specifically expressed on the apical side of proximal tubular cells, is involved in the reabsorption of most of the glucose filtered by the glomeruli, and its inhibitors are gaining publicity as potent antihyperglycemic drugs. In some clinical trials, SGLT2 inhibitors exerted cardiovascular and kidney protective effects, which appeared to be partly independent of the original glucose-lowering effect. SGLT2 inhibitors have both direct and indirect renoprotective effects...
February 28, 2018: Internal Medicine
Lovic Dragan, Manolis Kallistratos, Constantinos Tsioufis, Charalampos Grassos, Dragan Djordjevic, Ivan Tasic, Athanasios Manolis, Andreas Pittaras
BACKGROUND: The impact of overt diabetes and poor glycemic control on the risk of cardiovascular disease is well established. Among patients with type 2 diabetes, several studies demonstrated a significant increase in coronary artery disease related death and cardiovacular events associated with HbA1c levels of greater than 7 % compared with lower levels. Sodium-glucose cotransporter 2 (SGLT-2) inhibitors are a novel class of anti-diabetic drugs that lower blood glucose levels through the suppression of renal glucose reabsorption thereby promoting renal glucose excretion...
February 26, 2018: Cardiovascular & Hematological Disorders Drug Targets
Mahakpreet Singh, Anoop Kumar
Sodium glucose co-transport 2 inhibitors (SGLT2-i) are the new class of anti-diabetic medications which are the recently approved (2013) by FDA for the treatment of diabetes. These inhibitors block the SGLT2 protein which involved in glucose reabsorption from proximal renal tubule which results in increased glucose excretion and lower blood glucose levels. These inhibitors exert favourable effects beyond glucose control such as consistent body weight, blood pressure, and serum uric acid reductions. Canagliflozin, Dapagliflozin, and Empagliflozin belong to the class of SGLT2 inhibitors...
February 25, 2018: Current Drug Safety
A T Layton, V Vallon
No abstract text is available yet for this article.
February 8, 2018: Acta Physiologica
Motoaki Sano
Even in the presence of excess glucose, the proximal renal tubules continue to resorb more glucose. Sodium glucose cotransporter 2 (SGLT2) inhibitors are drugs that control this "greed" (H. Ito, Keio University, Japan). Negative feedback mechanisms maintain homeostasis for various physiological functions. However, there is no negative feedback mechanism for resorption of glucose by the proximal renal tubules. When food was scarce during human evolution, not limiting nutrient reabsorption was advantageous for survival, but the opposite is true in the era of satiation...
February 4, 2018: Journal of Cardiology
Konstantinos Avranas, Konstantinos Imprialos, Konstantinos Stavropoulos, Georgios Lales, Alexandos Manafis, Anastasia Skalkou, Lars Kihm
BACKGROUND: The treatment of diabetes remains over the decades challenging, even after the introduction of numerous novel drugs of different classes. Most patients with type 2 diabetes necessitate the combination of multiple agents and eventually use of insulin. The newest, and possibly with the most pleiotropic actions after metformin are the sodium-glucose cotransporter 2 inhibitors (SGLT-2i). This class has a unique mechanism inhibiting the glucose reabsorption in the proximal tubule of the kidney...
February 6, 2018: Cardiovascular & Hematological Disorders Drug Targets
Dimitrios Milonas, Konstantinos Tziomalos
BACKGROUND: Type 2 diabetes mellitus (T2DM) is associated with substantially increased risk for cardiovascular events, including ischemic stroke. In turn, ischemic stroke represents a leading cause of mortality and long-term disability worldwide. The newest class of glucose-lowering agents is sodium-glucose cotransporter 2 (SGLT-2) inhibitors, which act through inhibition of glucose reabsorption in the kidney, resulting in glucose excretion without stimulating insulin release. Accumulating data suggests that these agents improve multiple risk factors for ischemic stroke except their glucose-lowering effect...
February 6, 2018: Cardiovascular & Hematological Disorders Drug Targets
Kumiko Shiba, Kyoichiro Tsuchiya, Chikara Komiya, Yasutaka Miyachi, Kentaro Mori, Noriko Shimazu, Shinobu Yamaguchi, Naomi Ogasawara, Makoto Katoh, Michiko Itoh, Takayoshi Suganami, Yoshihiro Ogawa
Sodium glucose cotransporter 2 (SGLT2) inhibitors, an antidiabetic drug, promotes urinary excretion of glucose by blocking its reabsorption in the renal proximal tubules. It is unclear whether SGLT2 inhibition could attenuate nonalcoholic steatohepatitis (NASH) and NASH-associated hepatocellular carcinoma. We examined the preventive effects of an SGLT2 inhibitor canagliflozin (CANA) in Western diet (WD)-fed melanocortin 4 receptor-deficient (MC4R-KO) mice, a mouse model of human NASH. An eight-week CANA treatment attenuated hepatic steatosis in WD-fed MC4R-KO mice, with increased epididymal fat mass without inflammatory changes...
February 5, 2018: Scientific Reports
Liang Xu, Tsuguhito Ota
Obesity-associated low-grade inflammation underlies insulin resistance and associated metabolic comorbidities, such as type 2 diabetes (T2D) and nonalcoholic fatty liver disease. Excessive ectopic fat deposition in obesity causes disorders of energy homeostasis and low-grade chronic inflammation in metabolic tissues. In particular, obesity-induced recruitment and activation of adipose tissue macrophages play a key role in the pathogenesis of insulin resistance and T2D. Therefore, treatment options for energy metabolism and macrophage polarization in obese subjects are needed...
December 11, 2017: Adipocyte
Anita T Layton, Volker Vallon
Sodium-glucose co-transporter 2 (SGLT2) inhibitors enhance urinary glucose, Na+ and fluid excretion and lower hyperglycemia in diabetes by targeting Na+ and glucose reabsorption along the proximal convoluted tubule. A goal of this study is to predict the effects of SGLT2 inhibitors in diabetic and non-diabetic patients with chronic kidney disease. To that end, we employed computational rat kidney models to explore how SGLT2 inhibition affects renal solute transport and metabolism when nephron populations are normal or reduced...
January 17, 2018: American Journal of Physiology. Renal Physiology
Meng Wei, Yi Shao, Qiao-Ran Liu, Qun-Zheng Wu, Xiang Zhang, Ming-Wei Zhong, Shao-Zhuang Liu, Guang-Yong Zhang, San-Yuan Hu
Bile acids (BAs), which are synthesized in the liver and cycled in the enterohepatic circulation, have been recognized as signaling molecules by activating their receptors in the intestine and liver. Serum taurine-conjugated BAs have been shown to be elevated after bariatric surgeries, although the postoperative BA profiles within the enterohepatic circulation have not been investigated. Clarification of these profiles could help explain the mechanisms by which bariatric surgery leads to BA profile alterations and subsequent metabolic effects...
December 21, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
Matteo Monami, Francesco Liistro, Alessia Scatena, Besmir Nreu, Edoardo Mannucci
AIMS: Sodium glucose co-transport-2 (SGLT-2) inhibitors reduce tubular glucose reabsorption, producing a reduction of blood glucose without stimulating insulin release. Aim of this meta-analysis is the systematic collection of available data from randomized trials, in order to establish the durability of the efficacy of SGLT-2 inhibitors on glycemic control and body mass index. METHODS: A meta-analysis was performed including all trials with a duration of at least 12 weeks, comparing SGLT-2 inhibitors with a non-SGLT-2 inhibitor agents in type 2 diabetes...
January 12, 2018: Diabetes, Obesity & Metabolism
M V Karg, A Bosch, D Kannenkeril, K Striepe, C Ott, M P Schneider, F Boemke-Zelch, P Linz, A M Nagel, J Titze, M Uder, R E Schmieder
BACKGROUND AND AIMS: Sodium tissue content by 23Na magnetic resonance imaging (Na-MRI) has been validated in experimental and human studies. SGLT-2 inhibition blocks the reabsorption of glucose and of sodium in the proximal tubular cells in a 1:1 fashion. We hypothesized that SGLT-2 inhibition in patients with type 2 diabetes characterized by sodium retention leads to decreased tissue sodium content due to its pharmacological action. MATERIALS AND METHODS: In a prospective double blind, placebo controlled, cross-over trial 59 patients (61 ± 7...
January 4, 2018: Cardiovascular Diabetology
Michael J Clearwater, Maria Revell, Stevie Noe, Merilyn Manley-Harris
Background and Aims: Floral nectar can be variable in composition, influencing pollinator behaviour and the composition of honey derived from it. The non-peroxide antibacterial activity of mānuka (Leptospermum scoparium, Myrtaceae) honey results from the chemical conversion of the triose sugar dihydroxyacetone (DHA), after DHA accumulates for an unknown reason in the nectar. This study examined variation in nectar DHA, glucose, fructose and sucrose content with floral stage of development, between mānuka genotypes with differing flower morphology, and in response to water stress...
January 2, 2018: Annals of Botany
Jinbao Huang, Simin Feng, Anna Liu, Zhuqing Dai, Hong Wang, Kenneth Reuhl, Wenyun Lu, Chung S Yang
SCOPE: The tea polyphenol (-)-epigallocatechin-3-gallate (EGCG) has been shown to ameliorate metabolic abnormalities and fatty liver. The present study investigates the mechanisms of actions of EGCG on bile acid homeostasis and lipid metabolism. METHODS: Male C57BL/6J mice are fed a low-fat diet, a high-fat western-style diet, or a high-fat western-style diet containing 0.32% EGCG. The effects of the treatments on biochemical parameters, gene expression, and lipidomics are analyzed...
December 26, 2017: Molecular Nutrition & Food Research
John Mondick, Matthew Riggs, Stefan Kaspers, Nima Soleymanlou, Jan Marquard, Valerie Nock
Sodium glucose cotransporter 2 inhibitors increase urinary glucose excretion (UGE) by lowering the renal threshold for glucose (RTG ). We aimed to quantify the effect of the sodium glucose cotransporter inhibitor empagliflozin on renal glucose reabsorption in patients with type 1 diabetes mellitus (T1DM) using a mechanistic population pharmacokinetic-pharmacodynamic (PK-PD) model and to compare results with analyses in patients with type 2 diabetes mellitus (T2DM). The PK-PD model was developed using data from a randomized phase 2 study in which patients with T1DM received oral once-daily empagliflozin 2...
December 18, 2017: Journal of Clinical Pharmacology
Liuqing Xu, Yingfeng Shi, Shougang Zhuang, Na Liu
Uric acid is the product of purine metabolism and its increased levels result in hyperuricemia. A number of epidemiological reports link hyperuricemia with multiple disorders, such as kidney diseases, cardiovascular diseases and diabetes. Recent studies also showed that expression and functional changes of urate transporters are associated with hyperuricemia. Uric acid transporters are divided into two categories: urate reabsorption transporters, including urate anion transporter 1 (URAT1), organic anion transporter 4 (OAT4) and glucose transporter 9 (GLUT9), and urate excretion transporetrs, including OAT1, OAT3, urate transporter (UAT), multidrug resistance protein 4 (MRP4/ABCC4), ABCG-2 and sodium-dependent phosphate transport protein...
November 21, 2017: Oncotarget
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