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https://www.readbyqxmd.com/read/29218459/discordance-between-mass-spectrometry-and-immunometric-igf-1-assay-in-pituitary-disease-a-prospective-study
#1
Vivien Bonert, John Carmichael, Zengru Wu, James Mirocha, Daniel A Perez, Nigel J Clarke, Richard E Reitz, Michael J McPhaul, Adam Mamelak
PURPOSE: Measuring IGF-1, a biomarker for GH activity, is critical to evaluating disordered hypothalamic-pituitary GH axis. Inconsistent IGF-1 measurements among different immunoassays are well documented. We switched from Immulite 2000 immunoassay to narrow-mass-extraction, high-resolution liquid chromatography mass-spectrometry (LC-MS) compliant with recent consensus recommendations on assay standardization. Comparability of these two assays in patients with pituitary disease in a clinical practice setting is not known...
December 7, 2017: Pituitary
https://www.readbyqxmd.com/read/29217764/radiotherapy-activated-cancer-associated-fibroblasts-promote-tumor-progression-through-paracrine-igf-1r-activation
#2
Joke Tommelein, Elly De Vlieghere, Laurine Verset, Elodie Melsens, Justine Leenders, Benedicte Descamps, Annelies Debucquoy, Christian Vanhove, Patrick Pauwels, Christian P Gespach, Anne Vral, Astrid De Boeck, Karin Haustermans, Pascal de Tullio, Wim Ceelen, Pieter Demetter, Tom Boterberg, Marc Bracke, Olivier De Wever
Preoperative radiotherapy (RT) is a mainstay in the management of rectal cancer (RC), a tumor characterized by desmoplastic stroma containing cancer-associated fibroblasts (CAF). Although CAF are abundantly present, the effects of RT to CAF and its impact on cancer cells are unknown. We evaluated the damage responses of CAF to RT and investigated changes in colorectal cancer (CRC) cell growth, transcriptome, metabolome, and kinome in response to paracrine signals emerging from irradiated CAF. RT to CAF induced DNA damage, p53 activation, cell cycle arrest, and secretion of paracrine mediators including insulin-like growth factor-1 (IGF-1)...
December 7, 2017: Cancer Research
https://www.readbyqxmd.com/read/29215025/co-expression-of-mfat-1-and-pig-igf-1-genes-by-recombinant-plasmids-in-modified-chitosan-nanoparticles-and-its-synergistic-effect-on-mouse-immunity
#3
Qi Xiong, Jianlin Chen, Fei-Lin Li, Shiji Zhao, Xiaoping Wan, Xiao Yang, Jianglin Li, Danyu Luo, Zezhou Wang, Xuebin Lv, Rong Gao
To develop a cost-effective molecular regulator to improve growth metabolism and immunity of animals, a recombinant plasmid co-expressing fatty acid desaturase (mFat-1) and pig insulin growth like factor 1 (IGF-1) genes was constructed by the 2 A self-cleavage technique. After entrapment within modified chitosan nanoparticles (chitosan modified with polyethyleneglycol-polyethylenimine, CPP), the recombinant plasmid was injected intramuscularly into mice. Compared with controls, co-expression of mFat-1 and IGF-1 significantly raised the level of serum IGF-1, and increased the liver and muscle docosa hexaenoic acid (DHA) content...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29214734/increased-serum-level-of-igf-1-correlates-with-better-cognitive-status-in-end-stage-renal-disease-patients-undergoing-hemodialysis
#4
Vladimir Prelevic, Danilo Radunovic, Tanja Antunovic, Marina Ratkovic, Najdana Gligorovic-Bahranovic, Branka Gledovic, Snezana Vujosevic, Mirjana Nedovic-Vukovic, Nikolina Basic-Jukic
Prevalence of cognitive function decline in end stage renal disease (ESRD) patients undergoing hemodialysis is higher than in the general population. We analyzed risk factors for cognitive function decline in those patients. This study included 93 ESRD patients undergoing hemodialysis two or three times a week in three centers for hemodialysis in Montenegro. The cognitive status of patients was assessed using the mini mental score examination (MMSE) test. All 93 patients have been divided into three groups according to the results of MMSE...
December 7, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/29214457/gut-microbiota-and-host-juvenile-growth
#5
REVIEW
Martin Schwarzer, Maura Strigini, François Leulier
Good genes, good food, good friends. That is what parents hope will sustain and nurture the harmonious growth of their children. The impact of the genetic background and nutrition on postnatal growth has been in the spot light for long, but the good friends have come to the scene only recently. Among the good friends perhaps the most crucial ones are those that we are carrying within ourselves. They comprise the trillions of microbes that collectively constitute each individual's intestinal microbiota. Indeed, recent epidemiological and field studies in humans, supported by extensive experimental data on animal models, demonstrate a clear role of the intestinal microbiota on their host's juvenile growth, especially under suboptimal nutrient conditions...
December 6, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/29214347/partial-phenotype-conversion-and-differential-trait-response-to-conditions-of-husbandry-in-mice
#6
Julia Brenmoehl, Christina Walz, Marion Spitschak, Elisa Wirthgen, Michael Walz, Martina Langhammer, Armin Tuchscherer, Ronald Naumann, Andreas Hoeflich
Functional genome analysis usually is performed on the level of genotype-phenotype interaction. However, phenotypes also depend on the relations between genomes and environment. In our experimental system, we observed differential response to environmental factors defined by different conditions of husbandry in a semi-barrier unit or in a SPF (specific pathogen free) barrier unit, which resulted in partial reversal of phenotypes previously observed under semi-barrier conditions. To provide an update of basic phenotypes in unselected and randomly mated controls (DUC) and long-term selected DUhTP (Dummerstorf high treadmill performance) mice in the SPF facility, we compared growth parameters, reproductive performance, the accretion of muscle and fat mass, physical activity, and running performance as well as food intake in all experimental groups...
December 6, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/29212962/effects-of-insulin-like-growth-factor-1-on-the-in-vitro-maturation-of-canine-oocytes
#7
Akane Sato, Borjigin Sarentonglaga, Kazuko Ogata, Mio Yamaguchi, Asuka Hara, Khurchabiling Atchalalt, Naoko Sugane, Rika Fukumori, Yoshikazu Nagao
The maturation rate of canine oocytes during in vitro maturation (IVM) needs to be improved. The present study was designed to evaluate the effects of insulin-like growth factor-1 (IGF-1) on the IVM of canine oocytes. Ovaries were obtained by ovariohysterectomy and were sliced to release cumulus-oocyte complexes (COCs). In Experiment 1, the effects of different concentrations of IGF-1 on the nuclear maturation of oocytes was investigated. The COCs were cultured in a modified medium (mTCM199) with IGF-1 (0, 0...
December 7, 2017: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29211968/men-and-women-differ-in-the-biochemical-composition-of-platelet-rich-plasma
#8
Grace Xiong, Nithya Lingampalli, Jayme C B Koltsov, Lawrence L Leung, Nidhi Bhutani, William H Robinson, Constance R Chu
BACKGROUND: Autologous platelet-rich plasma (PRP) is widely used for a variety of clinical applications. However, clinical outcome studies have not consistently shown positive effects. The composition of PRP differs based on many factors. An improved understanding of factors influencing the composition of PRP is important for the optimization of PRP use. HYPOTHESIS: Age and sex influence the PRP composition in healthy patients. STUDY DESIGN: Controlled laboratory study...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29211611/pregnancy-associated-plasma-protein-a-papp-a-levels-in-patients-with-severe-allergic-asthma-are-reduced-by-omalizumab
#9
Ismet Bulut, Zeynep F Ozseker, Abdurrahman Coskun, Mustafa Serteser, Ibrahim Unsal
BACKGROUND: Remodeling is a crucial feature of severe asthma and may be associated with activation of the allergic cascade by immunoglobulin E (IgE). Omalizumab, an anti-IgE monoclonal antibody, effectively targets the severe allergic asthma phenotype. Pregnancy-associated plasma protein-A (PAPP-A) is an insulin-like growth factor binding protein-4 (IGFBP-4) protease, increasing local insulin-like growth factor (IGF)-1 concentrations, which in turn initiating a cascade involved in the regulation of cell growth, differentiation, and proliferation in various tissues...
December 6, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29208686/effects-of-growth-hormone-administration-on-luteinizing-hormone-secretion-in-healthy-older-men-and-women
#10
Ranganath Muniyappa, Shannon D Sullivan, Sri Harsha Tella, Brent S Abel, S Mitchell Harman, Marc R Blackman
The known interactions between the somatotropic and hypothalamic-pituitary-gonadal (HPG) axes have not been well delineated in older individuals. Aging-associated decline in insulin like growth factor-1 (IGF-1) levels has been proposed to play a role in reproductive senescence in animals. However, the effects of GH on LH secretion are unknown in older individuals. Our objective was to determine whether GH modulates LH secretion or levels of sex steroids (SS) in healthy older (ages 65-88 years) men (n = 24) and women (n = 24) with low-normal plasma IGF-1 levels...
December 2017: Physiological Reports
https://www.readbyqxmd.com/read/29208461/simvastatin-inhibits-the-development-of-radioresistant-esophageal-cancer-cells-by-increasing-the-radiosensitivity-and-reversing-emt-process-via-the-pten-pi3k-akt-pathway
#11
Yingying Jin, Kun Xu, Qingjuan Chen, Baofeng Wang, Jiyuan Pan, Shan Huang, Yang Wei, Hongbing Ma
Acquired radioresistance compromises the efficacy of radiotherapy for carcinomas including esophageal cancer (EC), thus resulting in recurrence and poor survival. Recent research corroborated radiosensitive function of simvastatin in stem-like breast cancer cells. However, its role in EC radioresistance remains poorly elucidated. Here, we developed a radioresistant EC cell line Ec9706-R with higher resistance to irradiation relative to control Ec9706 cells. Intriguingly, Ec9706-R cells exhibited epithelial-mesenchymal transition (EMT) characteristics with high invasion and migration ability...
December 2, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/29208357/differential-expression-of-igfbps-in-laron-syndrome-derived-lymphoblastoid-cell-lines-potential-correlation-with-reduced-cancer-incidence
#12
Lina Somri, Rive Sarfstein, Lena Lapkina-Gendler, Karthik Nagaraj, Zvi Laron, Leon A Bach, Haim Werner
Laron syndrome (LS), or primary growth hormone (GH) insensitivity, is a growth disorder that results from mutation of the GH-receptor (GHR) gene leading to congenital insulin-like growth factor-1 (IGF-1) deficiency. Recent epidemiological studies have shown that LS patients are protected from cancer development. Genome-wide profiling identified genes and signaling pathways that are differentially represented in LS patients, and that may contribute to cancer protection. The present study was aimed at evaluating the hypothesis that IGF binding proteins (IGFBPs) are differentially expressed in LS, most probably as a result of low circulating levels of IGF-1...
November 24, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/29207472/effects-of-%C3%AE-hydroxy-%C3%AE-methylbutyrate-free-acid-supplementation-on-strength-power-and-hormonal-adaptations-following-resistance-training
#13
Abbas Asadi, Hamid Arazi, Katsuhiko Suzuki
BACKGROUND: β-Hydroxy-β-methylbutyrate-free acid (HMB-FA) has been ingested prior to exercise to reduce muscle damage, however the effects of HMB-FA supplementation on hormonal, strength and power adaptation are unclear. METHODS: Sixteen healthy men were matched and randomized into two groups and performed six-week resistance training while supplementing with either HMB-FA or placebo (3 g per day). The subjects were evaluated for 1 repetition maximum (1RM) bench press and leg press and vertical jump (VJ) prior to and after training intervention...
December 2, 2017: Nutrients
https://www.readbyqxmd.com/read/29207170/bmi-1-suppression-increases-the-radiosensitivity-of-oesophageal-carcinoma-via-the-pi3k-akt-signaling-pathway
#14
Xing-Xiao Yang, Ming Ma, Mei-Xiang Sang, Xue-Yuan Zhang, Zhi-Kun Liu, Heng Song, Shu-Chai Zhu
B-cell‑specific Moloney murine leukaemia virus integration site-1 (BMI-1) contributes to the growth of tumour cells post-irradiation (IR). The aim of the present study was to characterize the effects of BMI-1 on cell viability, radiosensitivity and its mechanisms of action in oesophageal squamous cell cancer (ESCC). Western blotting and immunohistochemistry were employed to evaluate the protein expression of BMI-1 in ESCC cells and specimens, respectively. Additionally, the protein expression levels of BMI-1, H2AK119ub and γH2AX in ESCC cells were detected following different doses of IR and at different times after IR...
December 5, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29205754/preliminary-investigation-of-blood-concentrations-of-insulin-like-growth-factor-insulin-lactate-and-%C3%AE-hydroxybutyrate-in-dogs-with-lymphoma-as-compared-with-matched-controls
#15
B McQuown, K E Burgess, C R Heinze
It is well established that tumour cells have metabolic differences when compared with normal cells. This is particularly true for energy metabolism in which dogs with cancer have been reported to have higher blood insulin and lactate concentrations than control dogs. Moreover, some human and animal studies suggest that the insulin-like growth factor 1 (IGF-1) signalling pathway may play a role in tumorigenesis and tumour progression. At present, IGF-1 has not been evaluated in dogs with multicentric lymphoma...
December 4, 2017: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/29201206/combined-treatment-of-diabetic-nephropathy-with-alprostadil-and-calcium-dobesilate
#16
Lili Qin, Wenjun Qin, Jianfei Wang, Lin Lin
This study investigated the effects of alprostadil combined with calcium dobesilate on the treatment of diabetic nephropathy. We recruited 80 patients with diabetic nephropathy, who were randomly divided into experimental (n=40) and control (n=40) groups. Patients received high-quality low-protein diabetic diet intervention and subcutaneous injection of insulin to adjust blood glucose, combined with antihypertensive, antiplatelet drugs, and other comprehensive treatments. The control group received alprostadil and the experimental group received alprostadil combined with calcium dobesilate...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29198552/increased-prevalence-of-proliferative-retinopathy-in-patients-with-acromegaly
#17
Tzu-En Wu, Harn-Shen Chen
BACKGROUND: This pilot study was carried to determine the prevalence of retinopathy, especially proliferative retinopathy, in patients with acromegaly. METHODS: We analyzed 43 acromegalic patients and 129 age- and gender-matched patients with type 2 diabetes. The retinopathy status was determined from the medical records based on the ophthalmologist consultations of patients with acromegaly. Color photographs of the macula- and disc-centered views were obtained at an angle of 45° with a fundus camera after pharmacologic-induced mydriasis in patients with type 2 diabetes...
November 30, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29197579/microfluidic-production-of-bioactive-fibrin-micro-beads-embedded-in-crosslinked-collagen-used-as-an-injectable-bulking-agent-for-urinary-incontinence-treatment
#18
Vardar E, Larsson Hm, Simone Allazetta, Engelhardt Em, Pinnagoda K, Vythilingam G, Hubbell Ja, Lutolf Mp, Frey P
Endoscopic injection of bulking agents has been widely used to treat urinary incontinence, often due to urethral sphincter complex insufficiency. The aim of the study was to develop a novel injectable bioactive collagen-fibrin bulking agent restoring long-term continence by functional muscle tissue regeneration. Fibrin micro-beads were engineered using a droplet microfluidic system. They had an average diameter of 140 μm, and recombinant fibrin-binding insulin-like growth factor-1 (α2PI1-8-MMP-IGF-1) was covalently conjugated to the beads...
November 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29197368/an-asian-traditional-herbal-complex-containing-houttuynia-cordata-thunb-perilla-frutescens-var-acuta-and-green-tea-stimulates-hair-growth-in-mice
#19
Mun Su Chung, Woong Jin Bae, Sae Woong Choi, Kyu Won Lee, Hyun Cheoul Jeong, Fahad Bashraheel, Seung Hwan Jeon, Jin Woo Jung, Byung Il Yoon, Eun Bi Kwon, Hyun A Oh, Sung Yeoun Hwang, Sae Woong Kim
BACKGROUND: Houttuynia cordata Thunb (HC) is a traditional herbal medicine widely used in Asia for the treatment of patients with alopecia, usually in combination with other two herbal medicines (Perilla frutescens var. acuta (PFVA) and green tea (GT)). However, the effect of this herbal complex has not been clearly demonstrated. We sought to determine the hair growth-promoting effect of this herbal complex (HC, PFVA, and GT) in the animal model. METHODS: Six-week-old male C57BL/6 mice were randomly divided into four groups (negative control, finasteride (1 mg/kg) as a positive control, and two (200 and 400 mg/kg) concentrations of the herbal complex as experimental groups) and were fed its corresponding medications orally for 25 days...
December 2, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29187405/her2-driven-breast-tumorigenesis-relies-upon-interactions-of-the-estrogen-receptor-with-coactivator-med1
#20
Yongguang Yang, Marissa Leonard, Yijuan Zhang, Dan Zhao, Mahmoud Charif, Shagufta Khan, Jiang Wang, Elyse Lower, Xiaoting Zhang
Studies of the estrogen receptor (ER) coactivator protein MED1 have revealed its specific roles in pubertal mammary gland development and potential contributions to breast tumorigenesis, based on co-amplification of MED1 and HER2 in certain breast cancers. In this study, we generated a mouse model of mammary tumorigenesis harboring the MMTV-HER2 oncogene and mutation of MED1 to evaluate its role in HER2-driven tumorigenesis. MED1 mutation in its ER-interacting LxxLL motifs was sufficient to delay tumor onset and impair tumor growth, metastasis and cancer stem-like cell formation in this model...
November 29, 2017: Cancer Research
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