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https://www.readbyqxmd.com/read/28813718/transgenic-mice-over-expressing-rbp4-have-rbp4-dependent-and-light-independent-retinal-degeneration
#1
Mei Du, Eric Phelps, Michael J Balangue, Aaron Dockins, Gennadiy Moiseyev, Younghwa Shin, Shelley Kane, Laura Otalora, Jian-Xing Ma, Rafal Farjo, Krysten M Farjo
Purpose: Transgenic mice overexpressing serum retinol-binding protein (RBP4-Tg) develop progressive retinal degeneration, characterized by microglia activation, yet the precise mechanisms underlying retinal degeneration are unclear. Previous studies showed RBP4-Tg mice have normal ocular retinoid levels, suggesting that degeneration is independent of the retinoid visual cycle or light exposure. The present study addresses whether retinal degeneration is light-dependent and RBP4-dependent by testing the effects of dark-rearing and pharmacological lowering of serum RBP4 levels, respectively...
August 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28733465/the-retinol-binding-protein-receptor-stra6-regulates-diurnal-insulin-responses
#2
Christy M Gliniak, J Mark Brown, Noa Noy
It has long been appreciated that insulin action is closely tied to circadian rhythms. However, mechanisms that dictate diurnal insulin sensitivity in metabolic tissues are not well understood. Retinol binding protein 4 (RBP4) has been implicated as a driver of insulin resistance in rodents and humans, and has become an attractive drug target in type 2 diabetes. RBP4 is synthesized primarily in the liver where it binds retinol and transports it to tissues throughout the body. The retinol-RBP4 complex (holo-RBP) can be recognized by a cell surface receptor known as stimulated by retinoic acid 6 (STRA6) which transports retinol into cells...
July 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28718514/aldehyde-dehydrogenase-1-a1-regulates-energy-metabolism-in-adipocytes-from-different-species
#3
Kefeng Yang, Christopher Adin, Qiwen Shen, Ly James Lee, Lianbo Yu, Paolo Fadda, Arpad Samogyi, Kathleen Ham, Lu Xu, Chen Gilor, Ouliana Ziouzenkova
BACKGROUND: Survival and longevity of xenotransplants depend on immune function and ability to integrate energy metabolism between cells from different species. However, mechanisms for interspecies cross talk in energy metabolism are not well understood. White adipose tissue stores energy and is capable of mobilization and dissipation of energy as heat (thermogenesis) by adipocytes expressing uncoupling protein 1 (Ucp1). Both pathways are under the control of vitamin A metabolizing enzymes...
July 17, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28713486/concurrent-aerobic-and-resistance-training-has-anti-inflammatory-effects-and-increases-both-plasma-and-leukocyte-levels-of-igf-1-in-late-middle-aged-type-2-diabetic-patients
#4
Giosuè Annibalini, Francesco Lucertini, Deborah Agostini, Luciana Vallorani, Annamaria Gioacchini, Elena Barbieri, Michele Guescini, Lucia Casadei, Annunziata Passalia, Marta Del Sal, Giovanni Piccoli, Mauro Andreani, Ario Federici, Vilberto Stocchi
Type 2 diabetes (T2D) is an age-related chronic disease associated with metabolic dysregulation, chronic inflammation, and activation of peripheral blood mononuclear cells (PBMC). The aim of this study was to assess the effects of a concurrent exercise training program on inflammatory status and metabolic parameters of T2D patients. Sixteen male patients (age range 55-70) were randomly assigned to an intervention group (n = 8), which underwent a concurrent aerobic and resistance training program (3 times a week; 16 weeks), or to a control group, which followed physicians' usual diabetes care advices...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28713075/association-of-parental-obesity-and-diabetes-mellitus-with-circulating-adipokines-in-nonobese-nondiabetic-offspring
#5
Justin P Zachariah, Rene Quiroz, Danielle Enserro, Charlotte Andersson, John F Keaney, Lisa M Sullivan, Ramachandran S Vasan
BACKGROUND: Adipokines are implicated in the development of obesity-related traits. We hypothesized that nonobese participants without diabetes mellitus (DM) whose parents were obese or had DM would have altered circulating adipokines compared with those without parental history of these conditions. METHODS AND RESULTS: Participants in the community-based Framingham Third Generation cohort who were not obese (body mass index <30) and not diabetic with both parents in the Framingham Offspring cohort were included in this analysis (n=2034, mean age 40 years, 54% women)...
July 16, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28704853/rbp4-lp-pla2-netrin-1-signaling-regulation-of-cognitive-dysfunction-in-diabetic-nephropathy-complicated-with-silent-cerebral-infarction
#6
Danyan Chen, Xiaolong Huang, Song Lu, Huacong Deng, Hua Gan, Xiaogang Du, Tang Weixue
Aim To investigate the RBP4/Lp-PLA2/Netrin-1 signal regulation of cognitive function impairment in diabetic nephropathy patients with silent cerebral infarction (SCI). Methods One-hundred patients newly diagnosed with diabetic nephropathy patients were included. The patients were divided into SCI group and NSCI group according to the radiological data. The degrees of cognitive dysfunction were evaluated. Serum RBP4 concentrations were determined by ELISA and protein expressions of Lp-PLA2 and Netrin-1 were determined by Western Blot...
July 13, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28689994/rbp4-stra6-pathway-drives-cancer-stem-cell-maintenance-and-mediates-high-fat-diet-induced-colon-carcinogenesis
#7
Sheelarani Karunanithi, Liraz Levi, Jennifer DeVecchio, George Karagkounis, Ofer Reizes, Justin D Lathia, Matthew F Kalady, Noa Noy
The transmembrane protein, STRA6, functions as a vitamin A transporter and a cytokine receptor when activated by vitamin A-bound serum retinol binding protein 4 (RBP4). STRA6 activation transduces a JAK2-STAT3 signaling cascade and promotes tumorigenesis in a xenograft mouse model of colon cancer. We show here that RBP4 and STRA6 expression is associated with poor oncologic prognosis. Downregulating STRA6 or RBP4 in colon cancer cells decreased the fraction of cancer stem cells and their sphere and tumor initiation frequency...
August 8, 2017: Stem Cell Reports
https://www.readbyqxmd.com/read/28675715/identification-of-potential-biomarkers-for-systemic-lupus-erythematosus-diagnosis-using-two-dimensional-differential-gel-electrophoresis-2d-dige-and-mass-spectrometry
#8
Tamara Aparecida Reis Ferreira, Hélida Monteiro de Andrade, Paulo Madureira de Pádua, Maria das Graças Carvalho, Simone da Fonseca Pires, Ivana Helena Rocha Oliveira, Bruna Soares Souza Lima, Luis Carlos Fialho Júnior, Walter Batista Cicarini, Donat Alexander Chapeourouge, Jonas Henrique Perales, Tânia Mara Pinto Dabés Guimarães, Vicente de Paulo Coelho Peixoto de Toledo
Systemic lupus erythematosus (SLE) is an autoimmune disease of the connective tissue with a large spectrum of clinical manifestations. Immune deregulation leads to autoantibody and immune complexes overproduction, complement activation, and persistent tissue inflammation. Considering that the current diagnosis depends on the interpretation of the complex criteria established by the American College of Rheumatology and that the disease course is characterized by unpredictable activations and remissions, each patient develops different manifestations, and therefore, the discovery of specific biomarkers is urgently required...
June 2017: Autoimmunity
https://www.readbyqxmd.com/read/28668878/prognostic-importance-of-vitamins-a-e-and-retinol-binding-protein-4-in-renal-cell-carcinoma-patients
#9
Roman Sobotka, Otakar Čapoun, Marta Kalousová, Tomáš Hanuš, Tomáš Zima, Milada Koštířová, Viktor Soukup
AIM: To assess the prognostic importance of serum levels of retinol, retinol-binding protein 4 (RBP4) and vitamin E at the time of diagnosis in patients with renal cell carcinoma (RCC). PATIENTS AND METHODS: In this prospective study, in a cohort of 102 renal cell carcinoma patients, relationships between serum levels of the aforementioned markers and recurrence-free survival (RFS), overall survival (OS), as well as cancer-specific survival (CSS), were evaluated...
July 2017: Anticancer Research
https://www.readbyqxmd.com/read/28648555/comparison-of-plasma-pigment-epithelium-derived-factor-pedf-retinol-binding-protein-4-rbp-4-chitinase-3-like-protein-1-ykl-40-and-brain-derived-neurotrophic-factor-bdnf-for-the-identification-of-insulin-resistance
#10
F J K Toloza, M C Pérez-Matos, M L Ricardo-Silgado, M C Morales-Álvarez, J O Mantilla-Rivas, J A Pinzón-Cortés, M Pérez-Mayorga, M L Arévalo-García, G Tolosa-González, C O Mendivil
AIMS: To evaluate and compare the association of four potential insulin resistance (IR) biomarkers (pigment-epithelium-derived factor [PEDF], retinol-binding-protein-4 [RBP-4], chitinase-3-like protein 1 [YKL-40] and brain-derived neurotrophic factor [BDNF]) with objective measures of IR. METHODS: We studied 81 subjects with different metabolic profiles. All participants underwent a 5-point OGTT with calculation of multiple IR indexes. A subgroup of 21 participants additionally underwent a hyperinsulinemic-euglycemic clamp...
June 9, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28639612/elevated-serum-retinol-binding-protein-4-levels-are-correlated-with-blood-pressure-in-prehypertensive-chinese
#11
J-X Zhang, G-P Zhu, B-L Zhang, Y-Y Cheng
Retinol-binding protein 4 (RBP4) has been reported involving in the occurrence and development of hypertension. However, to date, few data are available on the correlation between serum RBP4 level and blood pressure (BP) in prehypertension. Therefore, this association was investigated in prehypertensive Chinese. Overall, 160 subjects with prehypertension (Pre-HT group) and 160 subjects with normal BP (NBP group) were recruited in this study. The subjects were divided into the following four subgroups according to body mass index (BMI): obese Pre-HT subgroup; non-obese Pre-HT subgroup; obese NBP subgroup; and non-obese NBP subgroup (n=80 in each)...
June 22, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28625041/energy-regulation-in-newly-diagnosed-tb-with-chronic-energy-deficiency-free-fatty-acids-and-rbp4
#12
Nurpudji A Taslim, Devintha Virani, Ni Ketut Sumartini, Karmila, Agussalim Bukhari, Aminuddin, Suryani As'ad, Raden Satriono, Haerani Rasyid, Irawaty Djaharuddin
BACKGROUND AND OBJECTIVES: Energy metabolism may be dysfunctionally integral between host and infective agent in active tuberculosis, mediated by adipocytokines and free fatty acids (FFA) as the products of triglyceride lipolysis in fat, blood or other tissues. Retinol Binding Protein 4 (RBP4) and asymmetric dimethylarginine (ADMA) are candidate adipocytokines. The possibility of a deleterious metabolic nexus in chronic energy deficiency (CED) (BMI <18.5 kg/m2) is explored. METHODS AND DESIGN: Newly diagnosed patients with tuberculosis (n=63) were selected using consecutive random sampling at a Centre for the Care and Treatment of Lung Diseases in Makassar, Indonesia...
June 2017: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28621339/hepatokines-linking-nonalcoholic-fatty-liver-disease-and-insulin-resistance
#13
REVIEW
Ruth C R Meex, Matthew J Watt
Hepatic steatosis is an underlying feature of nonalcoholic fatty liver disease (NAFLD), which is the most common form of liver disease and is present in up to ∼70% of individuals who are overweight. NAFLD is also associated with hypertriglyceridaemia and low levels of HDL, glucose intolerance, insulin resistance and type 2 diabetes mellitus. Hepatic steatosis is a strong predictor of the development of insulin resistance and often precedes the onset of other known mediators of insulin resistance. This sequence of events suggests that hepatic steatosis has a causal role in the development of insulin resistance in other tissues, such as skeletal muscle...
June 9, 2017: Nature Reviews. Endocrinology
https://www.readbyqxmd.com/read/28592664/altered-retinoid-signaling-compromises-decidualization-in-endometriotic-stromal-cells
#14
Mary Ellen Pavone, Saurabh Malpani, Matthew Dyson, Serdar Bulun
Decidualization alters multiple molecular pathways in endometrium to permit successful embryo implantation. We have reported that paracrine factors, including retinoids, secreted from progesterone treated endometrial stromal cells act on nearby epithelial cells to induce the estradiol metabolizing enzyme HSD17B2. This same induction is not seen in endometriotic stromal cells. We have also shown significant differences in retinoid uptake, metabolism and action in endometriotic tissue and stromal cells compared to normal endometrium...
June 7, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28588245/retinol-binding-protein-4-expression-marks-the-short-term-mortality-of-critically-ill-patients-with-underlying-liver-disease-lipid-but-not-glucose-matters
#15
Wei-Ting Chen, Mu-Shien Lee, Chia-Lin Chang, Cheng-Tang Chiu, Ming-Ling Chang
The implications of retinol-binding protein-4 (RBP4) expression in critically ill patients with underlying liver diseases remain unclear. A prospective cohort study involving 200 liver intensive care unit (ICU) patients was conducted, with 274 blood donors as controls. Patient outcomes were assessed using Cox and Kaplan-Meier analyses. Of the 200 ICU patients (mean age: 56.0 yrs), 79.5% were male, 72.5% were cirrhotic, 62% were septic, 29.5% were diabetic, and 29% expired in the ICU (median admission: 7.5 days)...
June 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28559210/cinnamaldehyde-in-diabetes-a-review-of-pharmacology-pharmacokinetics-and-safety
#16
REVIEW
Ruyuan Zhu, Haixia Liu, Chenyue Liu, Lili Wang, Rufeng Ma, Beibei Chen, Lin Li, Jianzhao Niu, Min Fu, Dongwei Zhang, Sihua Gao
Cinnamaldehyde, one of the active components derived from Cinnamon, has been used as a natural flavorant and fragrance agent in kitchen and industry. Emerging studies have been performed over the past decades to evaluate its beneficial role in management of diabetes and its complications. This review highlights recent advances of cinnamaldehyde in its glucolipid lowering effects, its pharmacokinetics, and its safety by consulting the Pubmed, China Knowledge Resource Integrated, China Science and Technology Journal, National Science and Technology Library, Wanfang Data, and the Web of Science Databases...
May 27, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28528355/increased-retinol-free-rbp4-contributes-to-insulin-resistance-in-gestational-diabetes-mellitus
#17
Yanmin Chen, Ping Lv, Mengkai Du, Zhaoxia Liang, Menglin Zhou, Danqing Chen
PURPOSE: Retinol-binding protein 4 (RBP4) is a circulating retinol transporter that is strongly associated with insulin resistance. The aim of this study was to evaluate the RBP4 and retinol level in rat model of gestational diabetes mellitus and the relationship between retinol-free RBP4 (apo-RBP4), retinol-bound RBP4 (holo-RBP4) and insulin resistance. METHODS: Pregnant rats were administered streptozotocin to induce diabetes. The RBP4 and retinol levels were evaluated in GDM and normal pregnant rats...
May 20, 2017: Archives of Gynecology and Obstetrics
https://www.readbyqxmd.com/read/28506697/inflammation-and-hemostasis-in-older-octogenarians-implication-in-5-year-survival
#18
Judit Cubedo, Teresa Padró, Francesc Formiga, Assumpta Ferrer, Glòria Padrós, Esther Peña, Lina Badimon
Social changes and medical advances have increased longevity, but the conditions governing healthy vs unhealthy cardiovascular (CV) aging are not fully known. Factors beyond classical CV risk factors may have an important unrecognized value. We sought to identify proteins differentially expressed in healthy octogenarians (HOs) without a history of cardiovascular disease (CVD) and preserved functional and cognitive state compared with octogenarians with a history of CVD and cognitive decline (UHOs) using a systems biology approach, and investigated how these proteins relate to CV mortality at 5-year follow-up...
April 26, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28505082/supervised-clustering-of-adipokines-and-hormonal-receptors-predict-prognosis-in-a-population-of-obese-women-with-type-1-endometrial-cancer
#19
Jennifer Uzan, Enora Laas, Issam Abd Alsamad, Dounia Skalli, Dhouha Mansouri, Bassam Haddad, Cyril Touboul
Obesity is a major risk factor for endometrial cancer (EC). Yet, its impact on prognosis is controversial. Obesity is associated with metabolic and hormonal dysregulation as well as adipokines increase. The aim of this study was to characterize the expression of biological factors related to obesity within the tumor and evaluate their impact on prognosis. One hundred and thirty-six patients, including 55 obese patients, with endometrioid type I EC operated by total hysterectomy were included in this retrospective study conducted in a Tertiary teaching hospital between 2000 and 2013...
May 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28473187/serum-rbp4-and-ckd-association-with-insulin-resistance-and-lipids
#20
Maria Alice M Domingos, Márcia Queiroz, Paulo Andrade Lotufo, Isabela Judith Benseñor, Silvia Maria de Oliveira Titan
OBJECTIVE: Serum RBP4 is new adipokine and it has been related to insulin resistance and diabetes risk in animal and clinical studies. However, there is controversy on this relationship among CKD patients. In this study, we evaluated the association of serum RBP4 with insulin resistance and cardiovascular risk factors in CKD. METHODS: Baseline data from the PROGREDIR Study (Sao Paulo, Brazil) comprising 454 participants (mainly stages 3 and 4) was analyzed. RESULTS: In univariable analysis, RBP4 was inversely related to renal function, age and HDL, and positively related to other lipids, insulinemia, HOMA, glycemia, albumin, phosphorus and right hepatic lobe diameter...
April 18, 2017: Journal of Diabetes and its Complications
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