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Melatonin restricts the viability and angiogenesis of vascular endothelial cells by suppressing HIF-1α/ROS/VEGF.

Angiogenesis is an essential process involved in various physiological, including placentation, and pathological, including cancer and endometriosis, processes. Melatonin (MLT), a well‑known natural hormone secreted primarily in the pineal gland, is involved in regulating neoangiogenesis and inhibiting the development of a variety of cancer types, including lung and breast cancer. However, the specific mechanism of its anti‑angiogenesis activity has not been systematically elucidated. In the present study, the effect of MLT on viability and angiogenesis of human umbilical vein endothelial cells (HUVECs), and the production of vascular endothelial growth factor (VEGF) and reactive oxygen species (ROS), under normoxia or hypoxia was analyzed using Cell Counting kit 8, tube formation, flow cytometry, ELISA and western blot assays. It was determined that the secretion of VEGF by HUVECs was significantly increased under hypoxia, while MLT selectively obstructed VEGF release as well as the production of ROS under hypoxia. Furthermore, MLT inhibited the viability of HUVECs in a dose‑dependent manner and reversed the increase in cell viability and tube formation that was induced by hypoxia/VEGF/H2O2. Additionally, treatment with an inhibitor of hypoxia inducible factor (HIF)‑1α (KC7F2) and MLT synergistically reduced the release of ROS and VEGF, and inhibited cell viability and tube formation of HUVECs. These observations demonstrate that MLT may serve dual roles in the inhibition of angiogenesis, as an antioxidant and a free radical scavenging agent. MLT suppresses the viability and angiogenesis of HUVECs through the downregulation of HIF‑1α/ROS/VEGF. In summary, the present data indicate that MLT may be a potential anticancer agent in solid tumors with abundant blood vessels, particularly combined with KC7F2.

1190 related Products with: Melatonin restricts the viability and angiogenesis of vascular endothelial cells by suppressing HIF-1α/ROS/VEGF.

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Effect of Dandelion Extracts on the Proliferation of Ovarian Granulosa Cells and Expression of Hormone Receptors.

In the current society, infertility related to age has become a social problem. The in vitro fertilization (IVF) success rate in women with poor ovarian response (POR) is very low. Dandelion extract T-1 (DE-T1) is an effective component of the extract from the leaves and stems of Taraxacum officinale, which is one of the medicines used in some patients with POR, but its molecular mechanism remains unclear.

1245 related Products with: Effect of Dandelion Extracts on the Proliferation of Ovarian Granulosa Cells and Expression of Hormone Receptors.

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Interrelation between ghrelin and gastrin in patients with combination of chronic gastritis and type 2 diabetes mellitus.

Introduction: Ghrelin is 28-amino-acid peptide that is produced by X/A-like cells present in the stomach. Gastrin is a hormone that stimulates gastric acid secretion and mucosal cell growth. The aim: to study the interrelation between ghrelin and gastrin levels in patients with combination of chronic gastritis and type 2 diabetes mellitus.

2452 related Products with: Interrelation between ghrelin and gastrin in patients with combination of chronic gastritis and type 2 diabetes mellitus.

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Vitreous Levels of Luteinizing Hormone and VEGF are Strongly Correlated in Healthy Mammalian Eyes.

Purpose/Aim: Luteinizing hormone (LH) is known to function as a key regulator of vascular endothelial growth factor (VEGF) expression in reproductive organs. In recent years, LH has also been detected in human vitreous and LH receptors have been identified in human retina. This study was aimed to investigate a potential correlation between LH and VEGF levels in healthy mammalian eyes to provide supporting evidence of LH's potential involvement in intraocular VEGF regulation.

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Effects of hPMSCs on granulosa cell apoptosis and AMH expression and their role in the restoration of ovary function in premature ovarian failure mice.

This study was performed to determine the effects of human placenta mesenchymal stem cell (hPMSC) transplantation on granulosa cell apoptosis and anti-Müllerian hormone (AMH) and follicle-stimulating hormone receptor (FSHR) expression in autoimmune drug-induced premature ovarian failure (POF) mice. The aim of this research is to investigate the mechanisms of hPMSCs on ovarian reserve capacity.

1214 related Products with: Effects of hPMSCs on granulosa cell apoptosis and AMH expression and their role in the restoration of ovary function in premature ovarian failure mice.

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Comparison between two inhibin B ELISA assays in 46,XY testicular disorders of sex development (DSD) with normal testosterone secretion.

Inhibin B is a hormone produced by the Sertoli cells that can provide important information for the investigation of disorders of sex development (DSD) with 46,XY karyotype. The aim of this study is to compare two enzyme-linked immunosorbent assay (ELISA) assays for dosage of serum inhibin B in patients with 46,XY DSD with normal testosterone secretion.

1138 related Products with: Comparison between two inhibin B ELISA assays in 46,XY testicular disorders of sex development (DSD) with normal testosterone secretion.

GLP 1 ELISA Kit, Rat Gluc Rat TGF-beta-inducible ea Rat TGF-beta-inducible ea Inhibin beta-A antibody S Beta Amyloid (42) ELISA K Beta Amyloid (1 40) ELISA Beta Amyloid (40) ELISA K C Peptide ELISA Kit, Rat Leptin ELISA Kit, Rat Lep Beta Amyloid (1 40) ELISA Lung cancer tissue array Lung adenocarcinoma and n

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Membrane-initiated effects of Serelys on proliferation and apoptosis of human breast cancer cells.

Herbal extracts used for the alleviation of postmenopausal symptoms might have a lower risk of breast cancer development than hormone therapy. Serelys is a product composed of purified pollen cytoplasm extracts. Recent experimental data revealed that estrogens might trigger a further proliferative effect on breast cancer cells via the progesterone receptor membrane component-1 (PGRMC1) in addition to the proliferative effect via intracellularly located receptors. MCF-7 and T47D cells were stably transfected with PGRMC1. Different concentrations of the extract alone and in combination with fixed concentrations of estradiol or a growth factor mixture were tested. Proliferation of treated cells was determined by the 3-(4,5-dimethylthiazol-2-yl) 2,5-diphenyl-tetrazolium bromide (MTT)-test and apoptosis was determined using a Cell Death Detection ELISA kit (CDD). Serelys was neutral in the cell lines transfected or not transfected with PGRMC1. It was also neutral in combination with estradiol or growth factors in terms of cell proliferation and cell apoptosis. Thus in contrast to hormone therapy Serelys appears to trigger no further breast cancer risk when applied in the post menopause to women, who do or do not overexpress PGRMC1. Overall Serelys may be an effective alternative for alleviating postmenopausal symptoms without increasing breast cancer risk.

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Comparison and validation of ELISA assays for plasma insulin-like growth factor-1 in the horse.

Insulin-like growth factor-1 (IGF-1) plays several important physiological roles, and IGF-related pathways have been implicated in developmental osteochondral disease and endocrinopathic laminitis. This factor is also a downstream marker of growth hormone activity and its peptide mimetics. Unfortunately, previously used assays for measuring equine IGF-1 (radioimmunoassays and ELISAs) are no longer commercially available, and many of the kits on the market give poor results when used on horse samples. The aim of the present study was to compare three different ELISA assays (two human and one horse-specific). Plasma samples from six Standardbreds, six ponies and six Andalusians were used. The human IGF-1 ELISA kit from Immunodiagnostic Systems (IDS) proved to be the most accurate and precise of the three kits; the other two assays gave apparently much lower concentrations, with poor recovery of spiked recombinant human IGF-1 and unacceptably poor intra-assay coefficients of variation (CV). The IDS assay gave an intra-assay CV of 3.59 % and inter-assay CV of 7.31%. Mean percentage recovery of spiked IGF-1 was 88.82%, and linearity and dilutional parallelism were satisfied. The IGF-1 plasma concentrations were 123.21 ±8.24 ng/mL for Standardbreds, 124.95 ±3.69 ng/mL for Andalusians and 174.26 ±1.94 ng/mL for ponies. Therefore of the three assays assessed, the IGF-1 ELISA manufactured by IDS was the most suitable for use with equine plasma samples and may have many useful applications in several different research areas. However, caution should be used when comparing equine studies where different analytical techniques and assays may have been used to measure this growth factor.

2641 related Products with: Comparison and validation of ELISA assays for plasma insulin-like growth factor-1 in the horse.

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Acetate-free biofiltration to remove fibroblast growth factor 23 in hemodialysis patients: a pilot study.

Serum levels of 32 kDa-phosphaturic hormone fibroblast growth factor 23 (FGF23) rise early in renal failure in order to keep phosphatemia within the normal range; however, this compensatory mechanism itself contributes to chronic kidney disease-mineral bone disorder. High FGF23 is also associated to left ventricular hypertrophy, vascular calcifications and thus increased cardiovascular risk. The aim of this pilot pre-post study was to evaluate the effects of a single hemodiafiltration session with acetate-free biofiltration (AFB) on FGF23 serum levels.

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Lipolysis and thermogenesis in adipose tissues as new potential mechanisms for metabolic benefits of dietary fiber.

Dietary fiber consumption is associated with reduced risk for the development of noncommunicable diseases. The aim of the present study was to evaluate the effects of cereal dietary fiber on the levels of proteins involved in lipolysis and thermogenesis in white adipose tissue (WAT) and brown adipose tissue (BAT) of C57 BL/6 J mice fed a high-fat diet (HFD).

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