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"Insulin-Like Growth Factor"

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https://www.readbyqxmd.com/read/28449086/a-coordinated-action-of-blood-borne-and-brain-insulin-like-growth-factor-i-in-the-response-to-traumatic-brain-injury
#1
A Santi, L Genis, I Torres Aleman
In response to injury, the brain produces different neuroprotective molecules, such as insulin-like growth factor I (IGF-I). However, IGF-I is also taken up by the brain from the circulation in response to physiological stimuli. Herein, we analyzed in mice the relative contribution of circulating and locally produced IGF-I to increased brain IGF-I levels after insult. Traumatic brain injury (TBI) induced by a controlled impact resulted in increased IGF-I levels in the vicinity of the lesion, but mice with low serum IGF-I showed significantly lower increases...
April 26, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28447755/gene-expression-profile-in-human-induced-pluripotent-stem-cells-chondrogenic-differentiation-in-vitro-part-a
#2
Wiktoria Maria Suchorska, Ewelina Augustyniak, Magdalena Richter, Tomasz Trzeciak
Human induced pluripotent stem cells (hiPSCs) offer promise in regenerative medicine, however more data are required to improve understanding of key aspects of the cell differentiation process, including how specific chondrogenic processes affect the gene expression profile of chondrocyte‑like cells and the relative value of cell differentiation markers. The main aims of the present study were as follows: To determine the gene expression profile of chondrogenic-like cells derived from hiPSCs cultured in mediums conditioned with HC‑402‑05a cells or supplemented with transforming growth factor β3 (TGF‑β3), and to assess the relative utility of the most commonly used chondrogenic markers as indicators of cell differentiation...
March 16, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28447314/inhibition-of-the-insulin-like-growth-factor-1-receptor-potentiates-acute-effects-of-castration-in-a-rat-model-for-prostate-cancer-growth-in-bone
#3
Annika Nordstrand, Sofia Halin Bergström, Elin Thysell, Erik Bovinder-Ylitalo, Ulf H Lerner, Anders Widmark, Anders Bergh, Pernilla Wikström
Prostate cancer (PCa) patients with bone metastases are primarily treated with androgen deprivation therapy (ADT). Less pronounced ADT effects are seen in metastases than in primary tumors. To test if acute effects of ADT was enhanced by concurrent inhibition of pro-survival insulin-like growth factor 1 (IGF-1), rats were inoculated with Dunning R3327-G tumor cells into the tibial bone marrow cavity and established tumors were treated with castration in combination with IGF-1 receptor (IGF-1R) inhibitor NVP-AEW541, or by each treatment alone...
April 26, 2017: Clinical & Experimental Metastasis
https://www.readbyqxmd.com/read/28445838/addition-of-insulin-like-growth-factor-i-to-the-maturation-medium-of-bovine-oocytes-subjected-to-heat-shock-effects-on-the-production-of-reactive-oxygen-species-mitochondrial-activity-and-oocyte-competence
#4
I J Ascari, N G Alves, J Jasmin, R R Lima, C C R Quintão, G Oberlender, E A Moraes, L S A Camargo
This study was performed to investigate the effects of insulin-like growth factor-I (IGF-I) addition to in vitro maturation (IVM) medium on apoptosis, mitochondrial membrane potential, ROS production, and developmental competence of bovine oocytes subjected to heat shock. Two temperatures (conventional: 24 h at 38.5°C, or heat shock: 12 h at 41°C followed by 12 h at 38.5°C) and 3 IGF-I concentrations (0, 25, and 100 ng/mL) were tested during IVM. The oocytes were then fertilized in vitro, and the presumptive zygotes were cultured until reaching the blastocyst stage...
March 25, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28444660/effects-of-cycling-and-exergaming-on-neurotrophic-factors-in-elderly-type-2-diabetic-men-a-preliminary-investigation
#5
Christian Brinkmann, Leonie Schäfer, Magd Masoud, Joachim Latsch, Daniel Lay, Wilhelm Bloch, Klara Brixius
Patients with type 2 diabetes mellitus (T2DM) are at increased risk of developing neurodegenerative diseases. There is growing evidence that repeated exercise-induced transient increases in neurotrophic factors can augment neurogenesis and neuroplasticity. This pilot study compares the effects of 30-min submaximal cycling with those of exergaming (combining exercise and video gaming) at the same duration and same rating of perceived exertion (BORG RPE: 14-15) on serum neurotrophic factors in 8 elderly non-insulin-dependent T2DM patients (71±4 years) (2×2 crossover design)...
April 25, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28443262/a-rare-association-of-central-hypothyroidism-and-adrenal-insufficiency-in-a-boy-with-williams-beuren-syndrome
#6
Devi Dayal, Dinesh Giri, Senthil Senniappan
Primary hypothyroidism related to morphological and volumetric abnormalities of the thyroid gland is one of the commonest of several endocrine dysfunctions in Williams-Beuren syndrome (WBS). We report a 10-month-old boy with WBS who presented with central hypothyroidism. During the neonatal period, he had prolonged jaundice, feeding difficulties and episodes of colic that continued during early infancy. Additionally, there was slowing of growth and mild developmental delay. He underwent surgical repair for supravalvular aortic stenosis at 6 months of age...
March 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28443260/growth-without-growth-hormone-in-combined-pituitary-hormone-deficiency-caused-by-pituitary-stalk-interruption-syndrome
#7
Sang Soo Lee, A-Leum Han, Moon Bae Ahn, Shin Hee Kim, Won Kyoung Cho, Kyoung Soon Cho, So Hyun Park, Min Ho Jung, Byung-Kyu Suh
Growth hormone (GH) is an essential element for normal growth. However, reports of normal growth without GH have been made in patients who have undergone brain surgery for craniopharyngioma. Normal growth without GH can be explained by hyperinsulinemia, hyperprolactinemia, elevated leptin levels, and GH variants; however, its exact mechanism has not been elucidated yet. We diagnosed a female patient aged 13 with combined pituitary hormone deficiency (CPHD) caused by pituitary stalk interruption syndrome (PSIS)...
March 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28443257/influence-of-the-202-a-c-insulin-like-growth-factor-binding-protein-3-promoter-polymorphism-on-individual-variation-in-height-in-korean-girls
#8
Min Ju Yi, Tae Young Park, Il Tae Hwang, Seung Yang
PURPOSE: The most common single nucleotide polymorphism in the IGFBP3 promoter region occurs at position -202. This polymorphic variation occurs frequently and may influence growth hormone responsiveness and somatic growth. However, the effects of IGFBP3 promoter polymorphism on growth in children are unknown. METHODS: Restriction fragment length polymorphism-based genotyping of the -202 single nucleotide polymorphism was performed in 146 Korean girls aged between 15 and 16 years, who were selected randomly from the Seoul School Health Promotion Center...
March 2017: Annals of Pediatric Endocrinology & Metabolism
https://www.readbyqxmd.com/read/28443209/metformin-prevents-hormonal-and-metabolic-disturbances-and-1-2-dimethylhydrazine-induced-colon-carcinogenesis-in-non-diabetic-rats
#9
Viktoria V Bekusova, Vasily M Patsanovskii, Alexander D Nozdrachev, Alexandr P Trashkov, Margarita R Artemenko, Vladimir N Anisimov
Effects of two doses of the anti-diabetic drug, metformin (MF), on hormonal and metabolic levels of serum of non-diabetic male Wistar rats with 1,2-dimethylhydrazine (DMH)-induced colon tumor adenocarcinomas were studied. Carcinogenesis in the animals was also observed. Rats with DMH-induced colon adenocarcinomas had elevated levels of serum glucose, insulin, insulin-like growth factor-1, total cholesterol, triglycerides, catalase, malonic dialdehyde, glycated hemoglobin, aspartate aminotransferase, and alanine aminotransferase and decreased hemoglobin...
February 2017: Cancer Biology & Medicine
https://www.readbyqxmd.com/read/28441325/the-effects-of-taekwondo-training-on-peripheral-neuroplasticity-related-growth-factors-cerebral-blood-flow-velocity-and-cognitive-functions-in-healthy-children-a-randomized-controlled-trial
#10
Su-Youn Cho, Wi-Young So, Hee-Tae Roh
Although regular Taekwondo (TKD) training has been reported to be effective for improving cognitive function in children, the mechanism underlying this improvement remains unclear. The purpose of the present study was to observe changes in neuroplasticity-related growth factors in the blood, assess cerebral blood flow velocity, and verify the resulting changes in children's cognitive function after TKD training. Thirty healthy elementary school students were randomly assigned to control (n = 15) and TKD (n = 15) groups...
April 25, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28440735/nuclear-factor-e2-related-factor-2-knockdown-enhances-glucose-uptake-and-alters-glucose-metabolism-in-aml12-hepatocytes
#11
Xiaoyang Yuan, Huijing Huang, Yi Huang, Jinli Wang, Jinhua Yan, Ling Ding, Cuntai Zhang, Le Zhang
Nuclear factor E2-related factor 2 (Nrf2) is a transcription factor known to induce the expression of a variety of antioxidant and detoxification genes. Recently, increasing evidence has revealed roles for Nrf2 in glucose, lipid, and energy metabolism; however, the exact functions of Nrf2 in hepatocyte biology are largely unclear. In the current study, the transient knockdown of Nrf2 via siRNA transfection enhanced the glucose uptake of fasting AML12 hepatocytes to 325.3 ± 11.1% ( P < 0.05) of that of untransfected control cells...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28440508/expression-levels-of-microrna%C3%A2-455-and-its-potential-functions-by-targeting-igf%C3%A2-1r-in-melanoma
#12
Hui Wang, Liang Yu, Xiujuan Shan
Melanoma has the highest fatality and malignancy of all skin cancers. In cancer, microRNAs (miRNAs) act as tumor suppressors or oncogenes, and inactivation of oncogenic miRNAs or restoration of tumor suppressor miRNAs has potential for cancer treatment. In the present study, miR‑455 expression levels were examined in melanoma tissues and cell lines, and miR‑455 was significantly downregulated in melanoma compared with matched normal tissues or normal epidermal melanocytes. In addition, increasing miR‑455 expression in melanoma cells reduced cell proliferation and invasion...
April 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440450/comprehensive-analysis-of-a-microrna-expression-profile-in-pediatric-medulloblastoma
#13
Junqiang Dai, Qiao Li, Zhitong Bing, Yinian Zhang, Liang Niu, Hang Yin, Guoqiang Yuan, Yawen Pan
Medulloblastoma is the most common malignant brain tumor of the central nervous system among children. Medulloblastoma is an embryonal tumor, of which little is known about the pathogenesis. Several efforts have been made to understand the molecular aspects of its tumorigenic pathways; however, these are poorly understood. microRNA (miRNA), a type of non‑coding short RNA, has been proven to be associated with a number of physiological processes and pathological processes of serious diseases, including brain tumors...
April 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28440057/overcoming-linsitinib-intrinsic-resistance-through-inhibition-of-nuclear-factor-%C3%AE%C2%BAb-signaling-in-esophageal-squamous-cell-carcinoma
#14
Junzhou Wu, Kaiyan Chen, Fanrong Zhang, Jiaoyue Jin, Nan Zhang, Dan Li, Lisha Ying, Wei Chen, Herbert Yu, Weimin Mao, Dan Su
The aim of this study is to evaluate the efficacy of insulin-like growth factor 1 receptor (IGF-1R) inhibitor Linsitinib, in esophageal squamous cell carcinoma (ESCC), and to characterize special biomarker to screen Linsitinib-sensitive patients as well as explore the molecular-resistant mechanism to Linsitinib in ESCC. Our study evaluated the sensitivity of insulin-like growth factor 1 receptor (IGF-1R) inhibitor, Linsitinib in ESCC cells with MTT assay. After Linsitinib treatment, the expressions of downstream signaling molecules and apoptosis pathways were measured by western blot...
April 24, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28439706/cks1bp7-a-pseudogene-of-cks1b-is-co-amplified-with-igf1r-in-breast-cancers
#15
Yansong Liu, Wei Wang, Yan Li, Feifei Sun, Jiaxiang Lin, Li Li
Pseudogenes have been reported to exhibit functional roles. Amplification or overexpression of CDC28 protein kinase regulatory subunit 1B (CKS1B) was found in various human cancers. But it was known little about CKS1B pseudogene 7 (CKS1BP7), a pseudogene sharing considerable sequence identity with CKS1B. The aim of this study was to evaluate copy number alterations (CNAs) of CKS1BP7 and address its potential roles in breast cancer. We detected copy numbers of CKS1BP7 and insulin-like growth factor 1 receptor (IGF1R) using quantitative multi-gene fluorescence in situ hybridization (QM-FISH) technique, compared their status in both invasive carcinoma and ductal carcinoma in situ (DCIS) components within the same tumors, and investigated the associations of CNAs with tumor features and patients outcomes...
April 24, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28439195/the-role-of-serial-measurements-of-serum-insulin-like-growth-factor-1-levels-in-the-development-of-retinopathy-of-prematurity
#16
Bayram Ali Dorum, Cansu Canbolat Yılmaz, Nilgün Köksal, Hilal Özkan, Meral Yıldız, Ahmet Tuncer Özmen
AIM: To determine the role of serum insulin-like growth factor-1 levels in the development of retinopathy of prematurity, which is a major cause of childhood blindness worldwide. MATERIAL AND METHODS: We prospectively studied newborn infants born at a postmenstrual age of <32 weeks and birth weights <1 500 gr, between January 1(st), 2015, and December 31(st), 2015. A total of 40 infants were enrolled in the study. The retinal examination time was determined in accordance with the American Academy of Pediatrics recommendations for retinopathy of prematurity screening and follow-up...
March 2017: Türk Pediatri Arşivi
https://www.readbyqxmd.com/read/28439104/a-novel-5ht3-receptor-igf1-mechanism-distinct-from-ssri-induced-antidepressant-effects
#17
M Kondo, Y Koyama, Y Nakamura, S Shimada
Depression is a common mental disorder affecting around 350 million people worldwide. Although selective serotonin reuptake inhibitors (SSRIs) are the most widely used antidepressants, a significant proportion of depressed patients do not achieve remission with SSRIs. In this study, we show that a serotonin type 3 receptor (5HT3R) agonist induces antidepressant effects as well as hippocampal neurogenesis independent of fluoxetine (a commonly used SSRI). Notably, our histological analysis reveals that 5HT3R and insulin-like growth factor 1 (IGF1) are expressed in the same neurons in the subgranular zone of the hippocampal dentate gyrus...
April 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28438765/longitudinal-characterization-of-renal-proximal-tubular-markers-in-normotensive-and-preeclamptic-pregnancies
#18
Elisabeth Codsi, Vesna D Garovic, Maria L Gonzalez-Suarez, Natasa Milic, Kristi S Borowski, Carl H Rose, Norman P Davies, Kianoush Kashani, John C Lieske, Wendy M White
Glomerular damage is common in preeclampsia (PE), but the extent and etiology of tubular injury are not well understood. The aim of this study was to evaluate tubular injury in patients with PE and to assess whether it predates clinical disease. We performed a prospective cohort study of 315 pregnant women who provided urine samples at the end of the second trimester and at delivery. This analysis included women who developed PE (n=15), gestational hypertension (GH) (n=14), and normotensive controls (NC) (n=44)...
April 24, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28438696/altered-temporal-lobe-white-matter-lipid-ion-profiles-in-an-experimental-model-of-sporadic-alzheimer-s-disease
#19
Ming Tong, Raiane Leão, Gina V Vimbela, Emine B Yalcin, Jared Kay, Alexander Krotow, Suzanne M de la Monte
BACKGROUND: White matter is an early and important yet under-evaluated target of Alzheimer's disease (AD). Metabolic impairments due to insulin and insulin-like growth factor resistance contribute to white matter degeneration because corresponding signal transduction pathways maintain oligodendrocyte function and survival. METHODS: This study utilized a model of sporadic AD in which adult Long Evans rats administered intracerebral streptozotocin (i.c. STZ) developed AD-type neurodegeneration...
April 21, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28438374/validity-of-self-assessed-sexual-maturation-against-physician-assessments-and-hormone-levels
#20
Jorge E Chavarro, Deborah J Watkins, Myriam C Afeiche, Zhenzhen Zhang, Brisa N Sánchez, David Cantonwine, Adriana Mercado-García, Clara Blank-Goldenberg, John D Meeker, Martha María Téllez-Rojo, Karen E Peterson
OBJECTIVE: To compare self-report and physician assessments of sexual maturation against serum hormone markers to evaluate the hypothesis that the validity of self-assessed sexual maturation is underestimated in traditional validation studies. STUDY DESIGN: We adapted a self-assessment instrument that 248 Mexican children and adolescents, aged 8-13 years, completed. The participants were examined by a trained pediatrician and provided fasting blood samples for measurement of reproductive hormones (eg, testosterone, estradiol, sex hormone-binding globulin, inhibin B) and other hormones (eg, C-peptide, insulin-like growth factor 1, leptin, dehydroepiandrosterone sulfate) known to change during adolescence...
April 21, 2017: Journal of Pediatrics
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