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https://www.readbyqxmd.com/read/29470176/association-of-insulin-like-growth-factor-1-and-igf-binding-protein-3-with-25-hydroxy-vitamin-d-in-pre-pubertal-and-adolescent-indian-girls
#1
Ramank K Marwaha, M K Garg, Sushil Gupta, Mohd Ashraf Ganie, Nandita Gupta, Archna Narang, Manoj Shukla, Preeti Arora, Annie Singh, Aditi Chadha, Ambrish Mithal
BACKGROUND: There is a high prevalence of vitamin D deficiency (VDD) in India. Molecular mechanisms suggest a strong relationship between vitamin D and growth factors. However, there is a paucity of literature with regard to a relationship between insulin-like growth factor-1 (IGF-1), insulin-like growth factor binding protein-3 (IGFBP-3) and vitamin D particularly in subjects with VDD. The objective of the study was to assess the relationship between growth factors and serum vitamin D-parathormone (PTH) status in school girls and study the impact of vitamin D supplementation on growth factors in pre-pubertal girls with VDD...
February 22, 2018: Journal of Pediatric Endocrinology & Metabolism: JPEM
https://www.readbyqxmd.com/read/29467286/viral-insulin-like-peptides-activate-human-insulin-and-igf-1-receptor-signaling-a-paradigm-shift-for-host-microbe-interactions
#2
Emrah Altindis, Weikang Cai, Masaji Sakaguchi, Fa Zhang, Wang GuoXiao, Fa Liu, Pierre De Meyts, Vasily Gelfanov, Hui Pan, Richard DiMarchi, C Ronald Kahn
Viruses are the most abundant biological entities and carry a wide variety of genetic material, including the ability to encode host-like proteins. Here we show that viruses carry sequences with significant homology to several human peptide hormones including insulin, insulin-like growth factors (IGF)-1 and -2, FGF-19 and -21, endothelin-1, inhibin, adiponectin, and resistin. Among the strongest homologies were those for four viral insulin/IGF-1-like peptides (VILPs), each encoded by a different member of the family Iridoviridae VILPs show up to 50% homology to human insulin/IGF-1, contain all critical cysteine residues, and are predicted to form similar 3D structures...
February 21, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29467020/insulin-like-growth-factor-1-mediated-regulation-of-mir-193a-expression-promotes-the-migration-and-proliferation-of-c-kit-positive-mouse-cardiac-stem-cells
#3
Yuning Sun, Rongfeng Xu, Jia Huang, Yuyu Yao, Xiaodong Pan, Zhongpu Chen, Genshan Ma
BACKGROUND: C-kit-positive cardiac stem cells (CSCs) have been shown to be a promising candidate treatment for myocardial infarction and heart failure. Insulin-like growth factor (IGF)-1 is an anabolic growth hormone that regulates cellular proliferation, differentiation, senescence, and death in various tissues. Although IGF-1 promotes the migration and proliferation of c-kit-positive mouse CSCs, the underlying mechanism remains unclear. METHODS: Cells were isolated from adult mouse hearts, and c-kit-positive CSCs were separated using magnetic beads...
February 21, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29466685/prolactin-regulates-liver-growth-during-postnatal-development-in-mice
#4
Bibiana Moreno-Carranza, Marco Bravo-Manríquez, Arelí Baez, María G Ledesma-Colunga, Xarubet Ruiz-Herrera, Pamela Reyes-Ortega, Ericka A De Los Ríos, Yazmín Macotela, Gonzalo Martínez de la Escalera, Carmen Clapp
The liver grows during the early postnatal period first at slower and then at faster rates than the body to achieve the adult liver-to-body weight ratio (LBW), a constant reflecting liver health. The hormone prolactin (PRL) stimulates adult liver growth and regeneration and its levels are high in the circulation of newborn infants, but whether PRL plays a role on neonatal liver growth is unknown. Here, we show that the liver produces PRL and upregulates the PRL receptor in mice during the first 2 weeks after birth, when liver growth lags behind body growth...
February 21, 2018: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/29466413/impact-of-insulin-on-primary-arcuate-neurons-culture-is-dependent-on-early-postnatal-nutritional-status-and-neuronal-subpopulation
#5
Lyvianne Decourtye, Maud Clemessy, Erik Mire, Tatiana Ledent, Laurence Périn, Iain C Robinson, Yves Le Bouc, Laurent Kappeler
Nutrition plays a critical role in programming and shaping linear growth during early postnatal life through direct action on the development of the neuroendocrine somatotropic (GH/IGF-1) axis. IGF-1 is a key factor in modulating the programming of linear growth during this period. Notably, IGF-1 preferentially stimulates axonal growth of GHRH neurons in the arcuate nucleus of the hypothalamus (Arc), which is crucial for the proliferation of somatotroph progenitors in the pituitary, thus influencing later GH secretory capacity...
2018: PloS One
https://www.readbyqxmd.com/read/29464749/intraarticular-injection-autologous-platelet-rich-plasma-and-bone-marrow-concentrate-in-a-goat-osteoarthritis-model
#6
Zhen Wang, Chenjun Zhai, Hao Fei, Junzheng Hu, Weiding Cui, Zhen Wang, Zeng Li, Weimin Fan
To evaluate the effects of intraarticular injections of autologous platelet-rich plasma (PRP) or bone marrow concentrate (BMC) on osteoarthritis (OA), 24 adult goats were equally divided into control (Ctrl), saline (NS), PRP, and BMC groups, and OA was induced by surgery in NS, PRP, and BMC groups. Autologous PRP and BMC were obtained from whole blood and bone marrow aspirates, respectively. The data revealed, platelets were increased in BMC by 1.8-fold, monocytes by 5.6-fold, TGF-β1 by 7.7-fold and IGF-1 by 3...
February 21, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29464357/decreased-bone-mineral-density-in-women-with-sheehan-s-syndrome-and-improvement-following-oestrogen-replacement-and-nutritional-supplementation
#7
Purnima Agarwal, Ramesh Gomez, Eesh Bhatia, Subhash Yadav
Sheehan's syndrome (SS) is an important cause of pan-hypopituitarism in women. There is scanty information on bone mineral density (BMD) in this condition. We determined BMD and the changes in BMD after oestrogen (E2) replacement and nutritional supplementation in women with SS. In a cross-sectional study, BMD was measured by DEXA in 83 patients [age (mean ± SD) 42 ± 9.2 years] and compared with an equal number of matched controls. In a sub-set of 19 patients, we conducted an open-label, prospective study to determine changes in BMD after 1 year of replacement of E2, and calcium and vitamin D3 supplementation...
February 20, 2018: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/29463451/starvation-stress-resistance-and-cancer
#8
REVIEW
Roberta Buono, Valter D Longo
Cancer cells are characterized by dysregulation in signal transduction and metabolic pathways leading to increased glucose uptake, altered mitochondrial function, and the evasion of antigrowth signals. Fasting and fasting-mimicking diets (FMDs) provide a particularly promising intervention to promote differential effects in normal and malignant cells. These effects are caused in part by the reduction in IGF-1, insulin, and glucose and the increase in IGFBP1 and ketone bodies, which generate conditions that force cancer cells to rely more on metabolites and factors that are limited in the blood, thus resulting in cell death...
February 17, 2018: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/29462978/impact-of-western-and-mediterranean-diets-and-vitamin-d-on-muscle-fibers-of-sedentary-rats
#9
Francesca Maria Trovato, Paola Castrogiovanni, Marta Anna Szychlinska, Francesco Purrello, Giuseppe Musumeci
BACKGROUND: The metabolic syndrome is associated with sarcopenia. Decreased serum levels of Vitamin D (VitD) and insulin-like growth factor (IGF)-1 and their mutual relationship were also reported. We aimed to evaluate whether different dietary profiles, containing or not VitD, may exert different effects on muscle molecular morphology. METHODS: Twenty-eight male rats were fed for 10 weeks in order to detect early defects induced by different dietary regimens: regular diet (R); regular diet with vitamin D supplementation (R-DS) and regular diet with vitamin D restriction (R-DR); high-fat butter-based diets (HFB-DS and HFB-DR) with 41% energy from fat; high-fat extra-virgin olive oil-based diets (HFEVO-DS and HFEVO-DR) with 41% energy from fat...
February 17, 2018: Nutrients
https://www.readbyqxmd.com/read/29461970/aerobic-exercise-inhibits-acute-lung-injury-from-mouse-to-human-evidence-exercise-reduced-lung-injury-markers-in-mouse-and-in-cells
#10
Nicole Cristine Rigonato-Oliveira, BreAnne Mackenzie, Andre Luis Lacerda Bachi, Manoel Carneiro Oliveira-Junior, Alana Santos-Dias, Maysa Alves Rodrigues Brandao-Rangel, Humberto Delle, Tamara Costa-Guimaraes, Nilsa Regina Damaceno-Rodrigues, Nilsa Regina Dulley, Marcela Anhesini Benetti, Christiane Malfitano, Christiane de Angelis, Regiane Albertini, Ana Paula Ligeiro Oliveira, Asghar Abbasi, Hinnak Northoff, Rodolfo Paula Vieira
Acute respiratory distress syndrome (ARDS) is defined as hypoxemic respiratory failure with intense pulmonary inflammation, involving hyperactivation of endothelial cells and neutrophils. Given the anti-inflammatory effects of aerobic exercise (AE), this study investigated whether AE performed daily for 5 weeks would inhibit extra-pulmonary LPS-induced ARDS. C57Bl/6 mice were distributed into Control, Exercise, LPS and Exercise+LPS groups. AE was performed on a treadmill for 5x/week for four weeks before LPS administration...
2018: Exercise Immunology Review
https://www.readbyqxmd.com/read/29460817/mafos-gdm-trial-maternal-fish-oil-supplementation-in-women-with-gestational-diabetes-and-cord-blood-dna-methylation-at-insulin-like-growth-factor-1-igf-1-gene
#11
Dilek Dilli, Nazan Neslihan Doğan, Mehmet Şah İpek, Yunus Çavuş, Serdar Ceylaner, Haldun Doğan, Arzu Dursun, Tuncay Küçüközkan, Ayşegül Zenciroğlu
BACKGROUND: To evaluate the effects of maternal fish oil supplementation in women with gestational diabetes mellitus (GDM) on birthweight and DNA methylation at insulin like growth factor-1 (IGF-1) gene in their offspring. METHODS: Randomized controlled trial. A total of 120 women with GDM were randomized to one of the two groups between 24 and 28 weeks of the pregnancy: Group 1 (n = 52) received fish oil liquid softgel (Ocean plus®) and Group 2 (Placebo) (n = 68) sunflower oil liquid softgel...
February 2018: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/29460133/effects-of-metformin-on-prostatic-tissue-of-rats-with-metabolic-syndrome-and-benign-prostatic-hyperplasia
#12
Congyun Xu, Yan Xu, Zhou Shen, Hangcheng Zhou, Jun Xiao, Tao Huang
OBJECTIVES: To investigate the efficacy of insulin sensitizer on prostatic tissue in animal model with benign prostatic hyperplasia (BPH) secondary to metabolic syndrome (MetS). METHODS: Models were established by providing Sprague-Dawley rats with high fat diet (HFD) combined with metformin or not. All objects were killed 40 days later with prostatic tissue being removed, weighed before stained, as well as the expression level of insulin-like growth factor I (IGF-1) and receptor (IGF-1R) being measured, and the level of insulin resistance (IR) has also been evaluated...
February 19, 2018: International Urology and Nephrology
https://www.readbyqxmd.com/read/29460051/brain-stat5-signaling-modulates-learning-and-memory-formation
#13
Isadora C Furigo, Helen M Melo, Natalia M Lyra E Silva, Angela M Ramos-Lobo, Pryscila D S Teixeira, Daniella C Buonfiglio, Frederick Wasinski, Eliana R Lima, Eliza Higuti, Cibele N Peroni, Paolo Bartolini, Carlos R J Soares, Martin Metzger, Fernanda G de Felice, Jose Donato
The signal transducer and activator of transcription 5 (STAT5) is a transcription factor recruited by numerous cytokines. STAT5 is important for several physiological functions, including body and tissue growth, mammary gland development, immune system and lipid metabolism. However, the role of STAT5 signaling for brain functions is still poorly investigated, especially regarding cognitive aspects. Therefore, the objective of the present study was to investigate whether brain STAT5 signaling modulates learning and memory formation...
February 19, 2018: Brain Structure & Function
https://www.readbyqxmd.com/read/29459421/igf-1-protects-sh-sy5y-cells-against-mpp-induced-apoptosis-via-pi3k-pdk-1-akt-pathway
#14
Chanyang Kim, Seungjoon Park
Insulin-like growth factor (IGF)-1 is a well-known anti-apoptotic pro-survival factor and phosphatidylinositol-3-kinase (PI3K)/Akt pathway is linked to cell survival induced by IGF-1. It is also reported that Akt signaling is modulated by 3-phosphoinositide-dependent kinase-1 (PDK1). In the current study, we investigated whether the anti-apoptotic effect of IGF-1 in SH-SY5Y cells exposed to 1-methyl-4-phenylpyridinium (MPP+) is associated with the activity of PI3K/PDK1/Akt pathway. Treatment of cells with IGF-1 inhibited MPP+-induced apoptotic cell death...
February 19, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29458693/the-impact-of-continuous-positive-airway-pressure-on-circulating-igf-1-in-patients-with-obstructive-sleep-apnea
#15
Andreas Palm, Christian Berne, Helena Igelström, Pernilla Åsenlöf, Christer Janson, Eva Lindberg
STUDY OBJECTIVES: Obstructive sleep apnea (OSA) is a disease with metabolic and cardiovascular consequences and is associated with decreased serum concentrations of insulin-like growth factor-1 (IGF-1). The aim of this study was to investigate whether continuous positive airway pressure (CPAP) will increase serum IGF-1 concentration in patients with OSA. METHODS: Patients with moderate to severe OSA were recruited from a sleep clinic and serum IGF-1 was measured before initiation of CPAP and at follow-up after 4...
February 13, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/29455576/central-infusion-of-igf-1-increases-hippocampal-neurogenesis-and-improves-neurobehavioral-function-following-traumatic-brain-injury
#16
Shaun W Carlson, Kathryn E Saatman
Traumatic brain injury (TBI) produces neuronal dysfunction and cellular loss that can culminate in lasting impairments in cognitive and motor abilities. Therapeutic agents that promote repair and replenish neurons after TBI hold promise in improving recovery of function. Insulin-like growth factor-1 (IGF-1) is a neurotrophic factor capable of mediating neuroprotective and neuroplasticity mechanisms. Targeted overexpression of IGF-1 enhances the generation of hippocampal newborn neurons in brain-injured mice; however, the translational neurogenic potential of exogenously administered IGF-1 after TBI remains unknown...
February 17, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29454302/aerobic-exercise-inhibits-obesity-induced-respiratory-phenotype
#17
Jefferson Comin Jonco Aquino-Junior, BreAnne MacKenzie, Ana Roberta Almeida-Oliveira, Ana Carolina Martins, Manoel Carneiro Oliveira-Junior, Auriléa Aparecida Britto, Fernanda Magalhaes Arantes-Costa, Nilsa Regina Damaceno-Rodrigues, Elia Garcia Caldini, Ana Paula Ligeiro de Oliveira, Dioze Guadagnini, Luiz Osorio Leiria, Djalma Rabelo Ricardo, Mario Jose Abdalla Saad, Rodolfo Paula Vieira
PURPOSE: Obesity results in decreased lung function and increased inflammation. Moderate aerobic exercise (AE) reduced lung inflammation and remodeling in a variety of respiratory disease models. Therefore, this study investigated whether AE can attenuate a diet-induced obesity respiratory phenotype; including airway hyper-responsiveness (AHR), remodeling and inflammation. METHODS: Sixty C57Bl/6 male mice were distributed into four groups: control lean (CL), exercise lean (EL), obese (O) and obese exercise (OE) groups (2 sets of 7 and 8 mice per group; n = 15)...
February 14, 2018: Cytokine
https://www.readbyqxmd.com/read/29452886/shifting-the-igf-axis-an-age-related-decline-in-human-tear-igf-1-correlates-with-clinical-signs-of-dry-eye
#18
Roshni Patel, Meifang Zhu, Danielle M Robertson
OBJECTIVE: The human corneal epithelium expresses both the insulin-like growth factor type 1 receptor (IGF-1R) and the IGF-1R/insulin receptor (INSR) hybrid. Despite the previous identification of IGF-1 in human tear fluid, little is known regarding the regulation of IGF-1 in tear fluid and its role in corneal epithelial homeostasis. In the present study, we investigated the impact of biological parameters on the concentration of human tear levels of IGF-1. DESIGN: Tear levels of IGF-1 were measured in 41 healthy, human volunteers without any reported symptoms of dry eye...
February 6, 2018: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/29451226/final-adult-height-and-endocrine-complications-in-young-adults-with-%C3%AE-thalassemia-major-tm-who-received-oral-iron-chelation-oic-in-comparison-with-those-who-did-not-use-oic
#19
Ashraf T Soliman, Mohamed A Yassin, Vincenzo De Sanctis
BACKGROUND: Relatively little is known about endocrine function, bone mineral health, and growth during oral iron chelation therapy in β-thalassemia major patients (TM) on treatment with deferasirox. AIMS OF THE STUDY: To study the frequency of endocrine complications, IGF-1 levels and final adult standing height (FA-Ht) in patients with BTM in two groups of adult patients. PATIENTS AND METHODS: The first group (Group A; 15 patients, 6 females and 9 males) received oral iron chelation therapy (OIC) with deferasirox for 6 years before puberty; the second group (Group B;40 patients) attained the FA-Ht before the use of OIC (iron chelation therapy with deferoxamine (DFO) given subcutaneously, since the age of 2 years)...
February 16, 2018: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29450728/winter-vitamin-d-3-supplementation-does-not-increase-muscle-strength-but-modulates-the-igf-axis-in-young-children
#20
Charlotte Mortensen, Christian Mølgaard, Hanne Hauger, Michael Kristensen, Camilla T Damsgaard
PURPOSE: To explore whether muscle strength, the insulin-like growth factor axis (IGF-axis), height, and body composition were associated with serum 25-hydroxyvitamin D [25(OH)D] and affected by winter vitamin D supplementation in healthy children, and furthermore to explore potential sex differences. METHODS: We performed a double-blind, placebo-controlled, dose-response winter trial at 55ºN. A total of 117 children aged 4-8 years were randomly assigned to either placebo, 10, or 20 µg/day of vitamin D 3 for 20 weeks...
February 15, 2018: European Journal of Nutrition
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