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https://www.readbyqxmd.com/read/28805303/controlled-release-of-igf1-enhances-urethral-sphincter-function-and-histological-structure-in-the-treatment-of-female-stress-urinary-incontinence-in-a-rodent-model
#1
Hao Yan, Liren Zhong, Yaodong Jiang, Jian Yang, Junhong Deng, Shicheng Wei, Emmanuel Opara, Anthony Atala, Xiangming Mao, Margot Damaser, Yuanyuan Zhang
OBJECTIVES: Stress urinary incontinence (SUI) diminishes the quality of life of millions, particularly women who have delivered vaginally, which can injure the urethral sphincter. Despite several well-established treatments for SUI, growth factor therapy might provide an alternative to promote urethral sphincter repair. The goal of this study was to determine the effects of controlled release of IGF1 from alginate-poly-L-ornithine-gelatin microbeads (IGF1-A-PLO-G microbeads) on sphincter tissue regeneration in a rat model of SUI...
August 14, 2017: BJU International
https://www.readbyqxmd.com/read/28800931/molecular-signatures-of-longevity-insights-from-cross-species-comparative-studies
#2
REVIEW
Siming Ma, Vadim N Gladyshev
Much of the current research on longevity focuses on the aging process within a single species. Several molecular players (e.g. IGF1 and MTOR), pharmacological compounds (e.g. rapamycin and metformin), and dietary approaches (e.g. calorie restriction and methionine restriction) have been shown to be important in regulating and modestly extending lifespan in model organisms. On the other hand, natural lifespan varies much more significantly across species. Within mammals alone, maximum lifespan differs more than 100 fold, but the underlying regulatory mechanisms remain poorly understood...
August 8, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28794261/neuroprotective-astrocyte-derived-insulin-igf-1-stimulate-endocytic-processing-and-extracellular-release-of-neuron-bound-a%C3%AE-oligomers
#3
Jason Pitt, Kyle C Wilcox, Vanessa Tortelli, Luan Pereira Diniz, Maira S Oliveira, Cassandra Dobbins, Xiao-Wen Yu, Sathwik Nandamuri, Flávia C A Gomes, Nadia DiNunno, Kirsten L Viola, Fernanda G De Felice, Sergio T Ferreira, William L Klein
Synaptopathy underlying memory deficits in Alzheimer's disease (AD) is increasingly thought to be instigated by toxic oligomers of the amyloid beta peptide (AβOs). Given the long latency and incomplete penetrance of AD dementia with respect to Aβ pathology, we hypothesized that factors present in the CNS may physiologically protect neurons from the deleterious impact of AβOs. Here we employed physically-separated neuron-astrocyte co-cultures to investigate potential non cell-autonomous neuroprotective factors influencing AβO toxicity...
August 9, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28793874/picropodophyllin-ppp-is-a-potent-rhabdomyosarcoma-growth-inhibitor-both-in-vitro-and-in-vivo
#4
Maciej Tarnowski, Marta Tkacz, Katarzyna Zgutka, Joanna Bujak, Patrycja Kopytko, Andrzej Pawlik
BACKGROUND: Insulin-like growth factors and insulin are important factors promoting cancer growth and metastasis. The molecules act through IGF1 (IGF1R) and insulin (InsR) receptors. Rhambodmyosarcomas (RMS) overproduce IGF2 - a potent ligand for IGF1R and, at the same time, highly express IGF1 receptor. The purpose of the study was to evaluate possible application of picropodophyllin (PPP) - a potent IGF1R inhibitor. METHODS: In our study we used a number of in vitro assays showing influence of IGF1R blockage on RMS cell lines (both ARMS and ERMS) proliferation, migration, adhesion, cell cycling and signal transduction pathways...
August 9, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28782600/mir-18a-induces-myotubes-atrophy-by-down-regulating-igfi
#5
Chuncheng Liu, Meng Wang, Min Chen, Kuo Zhang, Lijie Gu, Qiuyan Li, Zhengquan Yu, Ning Li, Qingyong Meng
Muscle atrophy occurs when there is a net loss of muscle mass, leading to a change in the balance between protein synthesis and protein degradation. Igf1 is important for protein synthesis in muscle cells and can induce local skeletal muscle hypertrophy and attenuate age-related skeletal muscle atrophy via the PI3K/Akt pathway in mice, consequently restoring and improving muscle mass and strength. In this study, we show that miR-18a expression is down-regulated during C2C12 myoblast differentiation and mouse tibialis anterior muscle postnatal development...
August 4, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28780002/sex-specific-gene-expression-and-life-span-regulation
#6
REVIEW
John Tower
Aging-related diseases show a marked sex bias. For example, women live longer than men yet have more Alzheimer's disease and osteoporosis, whereas men have more cancer and Parkinson's disease. Understanding the role of sex will be important in designing interventions and in understanding basic aging mechanisms. Aging also shows sex differences in model organisms. Dietary restriction (DR), reduced insulin/IGF1-like signaling (IIS), and reduced TOR signaling each increase life span preferentially in females in both flies and mice...
August 2, 2017: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/28773103/in-vitro-human-umbilical-vein-endothelial-cells-response-to-ionic-dissolution-products-from-lithium-containing-45s5-bioactive-glass
#7
Luis A Haro Durand, Gabriela E Vargas, Rosa Vera-Mesones, Alberto Baldi, María P Zago, María A Fanovich, Aldo R Boccaccini, Alejandro Gorustovich
Since lithium (Li⁺) plays roles in angiogenesis, the localized and controlled release of Li⁺ ions from bioactive glasses (BGs) represents a promising alternative therapy for the regeneration and repair of tissues with a high degree of vascularization. Here, microparticles from a base 45S5 BG composition containing (wt %) 45% SiO₂, 24.5% Na₂O, 24.5% CaO, and 6% P₂O₅, in which Na₂O was partially substituted by 5% Li₂O (45S5.5Li), were obtained. The results demonstrate that human umbilical vein endothelial cells (HUVECs) have greater migratory and proliferative response and ability to form tubules in vitro after stimulation with the ionic dissolution products (IDPs) of the 45S5...
July 3, 2017: Materials
https://www.readbyqxmd.com/read/28771488/maternal-obesity-programs-reduced-leptin-signaling-in-the-pituitary-and-altered-gh-igf1-axis-function-leading-to-increased-adiposity-in-adult-sheep-offspring
#8
Nuermaimaiti Tuersunjiang, John F Odhiambo, Desiree R Shasa, Ashley M Smith, Peter W Nathanielsz, Stephen P Ford
Studies in rodents highlight a role for leptin in stimulation of pituitary growth hormone (GH) secretion, with an impact on body composition regulation. We have reported that maternal obesity (MO) during ovine pregnancy results in hyperphagia, glucose-insulin dysregulation, increased adiposity, hypercortisolemia and hyperleptinemia in mature offspring subjected to a bout of ad libitum feeding. We hypothesized that MO reduces leptin signaling in the pituitary and down regulates the GH/IGF1 axis and increases circulating cortisol leading to increased adiposity in their adult offspring...
2017: PloS One
https://www.readbyqxmd.com/read/28768959/next-generation-sequencing-based-mutation-screening-of-86-patients-with-idiopathic-short-stature
#9
Atsushi Hattori, Yuko Katoh-Fukui, Akie Nakamura, Keiko Matsubara, Tsutomu Kamimaki, Hiroyuki Tanaka, Sumito Dateki, Masanori Adachi, Koji Muroya, Shinobu Yoshida, Shinobu Ida, Marie Mitani, Keisuke Nagasaki, Tsutomu Ogata, Erina Suzuki, Kenichiro Hata, Kazuhiko Nakabayashi, Yoichi Matsubara, Satoshi Narumi, Toshiaki Tanaka, Maki Fukami
Although mutations in ACAN, FGFR3, NPR2, and SHOX typically lead to skeletal dysplasia, and mutations in GHRHR, GH1, GHR, STAT5B, IGF1, IGFALS, and IGF1R usually underlie hormonal defects of the growth hormone (GH)-insulin-like growth factor 1 (IGF1) axis, such mutations have also been identified in patients with idiopathic short stature (ISS). Of these, SHOX abnormalities are known to account for a certain percentage of ISS cases, whereas the frequency of mutations in the other 10 genes in ISS cohorts remains unknown...
August 3, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28761040/microsatellite-and-single-nucleotide-polymorphisms-in-the-insulin-like-growth-factor-1-promoter-with-insulin-sensitivity-and-insulin-secretion
#10
Ruyao Wang, Dandan Xu, Rui Liu, Lijie Zhao, Liling Hu, Ping Wu
BACKGROUND To investigate associations of the CA microsatellite and rs35767, rs5742612, and rs2288377 polymorphisms and the single nucleotide polymorphism (SNP) haplotypes with and without the CA microsatellite in the IGF1 promoter with insulin sensitivity and secretion. MATERIAL AND METHODS The CA microsatellite and SNPs were genotyped in 389 type 2 diabetes mellitus (T2DM) patients. A 75 g oral glucose tolerance test (OGTT) was given to all the participants. Associations of the genotypes and haplotypes with insulin sensitivity, insulin secretion, glucose tolerance, and insulin-like growth factor 1 (IGF1) were analyzed by ANCOVA (general linear model) and multiple linear regression, after controlling for gender, age, and BMI...
August 1, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28751368/functional-correlates-of-detailed-body-composition-in-healthy-elderly-subjects
#11
Corinna Geisler, Lisa Schweitzer, Manfred James Müller
Methods of body composition analysis (BCA) are now widely used to characterize health status, i.e. nutritional status, metabolic rates and cardio-metabolic risk factors. However, the functional correlates of individual body components have not been systematically analyzed. A 2-compartment model was assessed by air displacement plethysmographie, detailed body composition (BC)was measured by whole-body magnetic resonance imaging (MRI) in a healthy population of 40 Caucasians aged 65 to 81 years (20 males; body mass index range: 18...
July 27, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28741471/altered-paracrine-signaling-from-the-injured-knee-joint-impairs-postnatal-long-bone-growth
#12
Alberto Roselló-Díez, Daniel Stephen, Alexandra L Joyner
Regulation of organ growth is a poorly understood process. In the long bones, the growth plates (GPs) drive elongation by generating a scaffold progressively replaced by bone. Although studies have focused on intrinsic GP regulation, classic and recent experiments suggest that local signals also modulate GP function. We devised a genetic mouse model to study extrinsic long bone growth modulation, in which injury is specifically induced in the left hindlimb, such that the right hindlimb serves as an internal control...
July 25, 2017: ELife
https://www.readbyqxmd.com/read/28738961/-circular-rna-circhipk3-promotes-nci-h1299-and-nci-h2170-cell-proliferation-through-mir-379-and-its-target-igf1
#13
Fang Tian, Yun Wang, Zhe Xiao, Xuejun Zhu
BACKGROUND: It has been proven that the circular RNA, possessing a stable covalently closed continuous loop, is a type of RNA molecule which is expressed widespread in mammals. The circular RNA circHIPK3 is abundantly expressed in hepatocellular carcinoma (HCC) and promotes tumourgenesis. However, a role for circHIPK3 has not been systematically examined in non-small cell lung cancer (NSCLC). In this study, we investigated whether circHIPK3 has an effect on cell proliferation in the NSCLC cell lines NCI-H1299 and NCI-H2170 and the underlying molecular mechanisms...
July 20, 2017: Zhongguo Fei Ai za Zhi, Chinese Journal of Lung Cancer
https://www.readbyqxmd.com/read/28734787/selenium-deficiency-induced-thioredoxin-suppression-and-thioredoxin-knock-down-disbalanced-insulin-responsiveness-in-chicken-cardiomyocytes-through-pi3k-akt-pathway-inhibition
#14
Jie Yang, Sattar Hamid, Jingzeng Cai, Qi Liu, Shiwen Xu, Ziwei Zhang
Thioredoxin (Txn) system is the most crucial antioxidant defense mechanism in cell consisting of Txn, thioredoxin reductase (TR) and Nicotinamide Adenine Dinucleotide Phosphate (NADPH). Perturbations in Txn system may compromise cell survival through oxidative stress induction. Metabolic activity of insulin plays important roles in fulfilling the stable and persistent demands of heart through glucose metabolism. However, the roles of Txn and Txn system in insulin modulated cardiac energy metabolism have been less reported...
July 19, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28733328/thermal-imprinting-modifies-bone-homeostasis-in-cold-challenged-sea-bream-sparus-aurata-l
#15
Ana Patrícia Mateus, Rita Costa, Enric Gisbert, Patricia I S Pinto, Karl B Andree, Alicia Estévez, Deborah M Power
Fish are ectotherms and temperature plays a determinant role in their physiology, biology and ecology and is a driver of seasonal responses. The present study assessed how thermal imprinting during embryonic and larval stages modified the response of adult fish to low water temperature. We targeted the gilthead sea bream that develops a condition known as winter syndrome when it is exposed to low water temperatures. Eggs and larvae of sea bream were exposed to four different thermal regimes and then the response of the resulting adults to a low temperature challenge was assessed...
July 21, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28732353/serum-insulin-like-growth-factor-1-and-its-binding-protein-3-as-prognostic-factors-for-the-incidence-progression-and-outcome-of-hepatocellular-carcinoma-a-systematic-review-and-meta-analysis
#16
Jing Wang, Yu-Chuan Li, Min Deng, Hai-Yin Jiang, Li-Hua Guo, Wen-Juan Zhou, Bing Ruan
PURPOSE: Previous studies have supported an association between serum insulin-like growth factor 1 (IGF1) and IGF-binding protein 3 (IGFBP3) levels and hepatocellular carcinoma (HCC), but the results were inaccurate. It has recently been proposed that IGF1 and IGFBP3 play roles in the time-to-progression (TTP) and overall survival (OS) of HCC patients. Our results revealed that serum IGF1 level is predictive of the progression and survival of HCC patients. RESULTS: HCC was associated with a significant reduction in serum IGF-1 and IGFBP-3 levels compared to cirrhosis (p = 0...
July 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28730461/low-salinity-affects-cellularity-dna-methylation-and-mrna-expression-of-igf1-in-the-liver-of-half-smooth-tongue-sole-cynoglossus-semilaevis
#17
Siping Li, Feng He, Haishen Wen, Jifang Li, Yufeng Si, Mingyuan Liu, Yajuan Huang, Lingcai Meng
Animal growth depends on feedback regulation of hormone levels and environmental conditions. Insulin-like growth factor-1 (Igf1) promotes cell growth and differentiation and represses apoptosis and is highly regulated by the environment. Moreover, animals modify physiological homeostasis under stressful conditions through epigenetics and genetic regulatory mechanisms. Therefore, a comprehensive understanding of the effects of salt on fish growth is needed. In this study, half smooth tongue sole (Cynoglossus semilaevis) were subjected to 15‰ salinity for 0, 7, and 60 days (D) to assess the effects of low salinity on liver cellularity and growth...
July 21, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28726241/investigating-the-role-of-the-igf-axis-as-a-predictor-of-biochemical-recurrence-in-prostate-cancer-patients-post-surgery
#18
Kieran J Breen, Amanda O'Neill, Lisa Murphy, Yue Fan, Susie Boyce, Noel Fitzgerald, Emma Dorris, Lauren Brady, Stephen P Finn, Brian D Hayes, Ann Treacy, Ciara Barrett, Mardiana Abdul Aziz, Elaine W Kay, John M Fitzpatrick, R William G Watson
BACKGROUND: Between 20% and 35% of prostate cancer (PCa) patients who undergo treatment with curative intent (ie, surgery or radiation therapy) for localized disease will experience biochemical recurrence (BCR). Alterations in the insulin-like growth factor (IGF) axis and PTEN expression have been implicated in the development and progression of several human tumors including PCa. We examined the expression of the insulin receptor (INSR), IGF-1 receptor (IGF-1R), PTEN, and AKT in radical prostatectomy tissue of patients who developed BCR post-surgery...
July 20, 2017: Prostate
https://www.readbyqxmd.com/read/28721221/pasireotide-successful-treatment-of-a-sparsely-granulated-tumour-in-a-resistant-case-of-acromegaly
#19
W K M G Amarawardena, K D Liyanarachchi, J D C Newell-Price, R J M Ross, D Iacovazzo, M Debono
The granulation pattern of somatotroph adenomas is well known to be associated with differing clinical and biochemical characteristics, and it has been shown that sparsely granulated tumours respond poorly to commonly used somatostatin receptor ligands (SRLs). We report a challenging case of acromegaly with a sparsely granulated tumour resistant to multiple modalities of treatment, ultimately achieving biochemical control with pasireotide. A 26-year-old lady presented with classical features of acromegaly, which was confirmed by an oral glucose tolerance test...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28720797/commensal-gut-microbiota-immunomodulatory-actions-in-bone-marrow-and-liver-have-catabolic-effects-on-skeletal-homeostasis-in-health
#20
Chad M Novince, Carolyn R Whittow, Johannes D Aartun, Jessica D Hathaway, Nicole Poulides, Michael B Chavez, Heidi M Steinkamp, Kaeleigh A Kirkwood, Emily Huang, Caroline Westwater, Keith L Kirkwood
Despite knowledge the gut microbiota regulates bone mass, mechanisms governing the normal gut microbiota's osteoimmunomodulatory effects on skeletal remodeling and homeostasis are unclear in the healthy adult skeleton. Young adult specific-pathogen-free and germ-free mice were used to delineate the commensal microbiota's immunoregulatory effects on osteoblastogenesis, osteoclastogenesis, marrow T-cell hematopoiesis, and extra-skeletal endocrine organ function. We report the commensal microbiota has anti-anabolic effects suppressing osteoblastogenesis and pro-catabolic effects enhancing osteoclastogenesis, which drive bone loss in health...
July 18, 2017: Scientific Reports
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