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Chenyue Ding, Qinyan Zou, Fuxin Wang, Huihua Wu, Rulei Chen, Jinghuan Lv, Mingfa Ling, Jian Sun, Wei Wang, Hong Li, Boxian Huang
BACKGROUND: Although many reports show that various kinds of stem cells have the ability to recover function in premature ovarian aging, few studies have looked at stem cell treatment of natural ovarian aging (NOA). We designed this experimental study to investigate whether human amniotic mesenchymal stem cells (hAMSCs) retain the ability to restore ovarian function, and how hAMSCs work in this process. METHODS: To build the NOA mouse model, the mice were fed for 12-14 months normally with young fertile female mice as the normal control group (3-5 months old)...
March 9, 2018: Stem Cell Research & Therapy
Chenyue Ding, Qinyan Zou, Fuxin Wang, Huihua Wu, Wei Wang, Hong Li, Boxian Huang
BACKGROUND/AIMS: Human adipose-derived stem cells (hADSCs) are a potential therapeutic option for clinical applications because of their ability to produce cytokines and their capacity for trilineage differentiation. To date, few researchers have investigated the effects of hADSCs on natural ovarian aging (NOA). METHODS: An NOA mouse model and human ovarian granule cells (hGCs) collected from individuals with NOA were prepared to assess the therapeutic effects and illuminate the mechanism of hADSCs in curing NOA...
2018: Cellular Physiology and Biochemistry
Anjali Narwal, Anju Devi, Achla Bharti Yadav, Virender Singh, Ambika Gupta
Heterotopic gastrointestinal cysts (HGCs) of the oral cavity are rare benign lesions mimicking benign or malignant pathologies. These cysts are usually discovered during infancy but may not appear until well into adulthood. The epithelial lining of these cysts shows variable presentation with the presence of an enteric lining as an essential component. The histogenesis is related to entrapment of undifferentiated, noncommitted endoderm within the oral cavity during the 3(rd) - 4(th) week of fetal life. We report a rare case of oral HGC located at a very rare site, i...
January 2017: National Journal of Maxillofacial Surgery
Sandro Sacchi, Federica Marinaro, Susanna Xella, Tiziana Marsella, Daniela Tagliasacchi, Antonio La Marca
PURPOSE: Anti-Müllerian hormone (AMH) and forkhead box L2 (FOXL2) are two pivotal genes expressed in human granulosa cells (hGCs) where both genes share similar inhibitory functions on activation and follicular growth in order to preserve the ovarian follicle reserve. Furthermore, AMH and FOXL2 contribute to inhibit steroidogenesis, decreasing or preventing the activation of gonadotrophin-dependent aromatase CYP19A1 cytochrome P450 family 19 subfamily A member 1 (CYP19A1). The purpose of this study is to evaluate the role of AMH in regulating the expression of FOXL2...
September 2017: Journal of Assisted Reproduction and Genetics
Javiera F De la Paz, Natalia Beiza, Susana Paredes-Zúñiga, Misque S Hoare, Miguel L Allende
In animals, hatching represents the transition point from a developing embryo to a free-living individual, the larva. This process is finely regulated by many endogenous and environmental factors and has been shown to be sensitive to a variety of chemical agents. It is commonly evaluated in bioassays in order to establish the effects of different agents on early development and reproductive capabilities in fish and other aquatic animals. In fish, the breakdown of the chorion is achieved by the secretion of choriolysin by hatching gland cells (HGCs) into the perivitelline space (PVS), coupled with spontaneous movements of the developing larva...
April 4, 2017: International Journal of Molecular Sciences
Tu Jiajie, Yang Yanzhou, Albert Cheung Hoi-Hung, Chen Zi-Jiang, Chan Wai-Yee
Granulosa cells (GCs) are essential somatic cells in the ovary and play an important role in folliculogenesis. Brain-derived neurotropic factor (BDNF) and the TGF-β pathway have been identified as a critical hormone and signalling pathway, respectively, in GCs. In this study, we found that a conserved microRNA family that includes miR-10a and miR-10b repressed proliferation and induced apoptosis in human, mouse, and rat GCs (hGCs, mGCs and rGCs, respectively). Moreover, essential hormones and growth factors in the follicle, such as FSH, FGF9 and some ligands in the TGF-β pathway (TGFβ1, Activin A, BMP4 and BMP15), inhibited miR-10a and miR-10b expression in GCs...
January 23, 2017: Scientific Reports
Darryl B Sneag, Eliana B Saltzman, David W Meister, Joseph H Feinberg, Steve K Lee, Scott W Wolfe
INTRODUCTION: The role of MRI in identifying hourglass constrictions (HGCs) of nerves in Parsonage-Turner syndrome (PTS) is largely unknown. METHODS: Six patients with PTS and absent or minimal recovery underwent MRI. Surgical exploration was performed at identified pathologic sites. RESULTS: The time between symptom onset and surgery was 12.4 ± 6.9 months; the time between MRI and surgery was 1.3 ± 0.6 months. Involved nerves included suprascapular, axillary, radial, and median nerve anterior interosseous and pronator teres fascicles...
July 2017: Muscle & Nerve
Gour Chand Daskhan, Carlo Pifferi, Olivier Renaudet
The synthesis of heteroglycoclusters (hGCs) is being subjected to rising interest, owing to their potential applications in glycobiology. In this paper, we report an efficient and straightforward convergent protocol based on orthogonal chemoselective ligations to prepare structurally well-defined cyclopeptide-based homo- and heterovalent glycoconjugates displaying 5-N-acetyl-neuraminic acid (Neu5Ac), galactose (Gal), and/or N-acetyl glucosamine (GlcNAc). We first used copper-catalyzed azide-alkyne cycloaddition and/or thiol-ene coupling to conjugate propargylated α-sialic acid 3, β-GlcNAc thiol 5, and β-Gal thiol 6 onto cyclopeptide scaffolds 7-9 to prepare tetravalent homoglycoclusters (10-12) and hGCs (13-14) with 2:2 combinations of sugars...
October 2016: ChemistryOpen
Jennifer Roche, Christelle Ramé, Maxime Reverchon, Namya Mellouk, Marion Cornuau, Fabrice Guerif, Pascal Froment, Joëlle Dupont
Apelin (APLN) is a recently discovered adipokine involved in the regulation of various metabolic functions. Its receptor, APLNR, is expressed in reproductive tissues, however, its role in human ovarian cells is unknown. In this study, we identified APLN and APLNR in human ovarian follicles and analyzed their expression in granulosa cells and follicular fluid obtained from obese and nonobese patients, with or without polycystic ovary syndrome (PCOS). We also investigated the effect of APLN on steroidogenesis in cultured human luteinized granulosa cells (hGCs) from nonobese patients without PCOS...
November 2016: Biology of Reproduction
Sandro Sacchi, Federica Marinaro, Debora Tondelli, Jessica Lui, Susanna Xella, Tiziana Marsella, Daniela Tagliasacchi, Cindy Argento, Alessandra Tirelli, Simone Giulini, Antonio La Marca
BACKGROUND: d-chiroinositol (DCI) is a inositolphosphoglycan (IPG) involved in several cellular functions that control the glucose metabolism. DCI functions as second messenger in the insulin signaling pathway and it is considered an insulin sensitizer since deficiency in tissue availability of DCI were shown to cause insulin resistance (IR). Polycystic ovary syndrome (PCOS) is a pathological condition that is often accompanied with insulin resistance. DCI can positively affects several aspect of PCOS etiology decreasing the total and free testosterone, lowering blood pressure, improving the glucose metabolism and increasing the ovulation frequency...
August 31, 2016: Reproductive Biology and Endocrinology: RB&E
Yanqing Kang, Weiwei Yuan, Xiaoyi Ding, Guangbin Wang
OBJECTIVE: To evaluate the computed tomography (CT) and magnetic resonance (MR) imaging features of para-acetabular chondrosarcoma (CS) and assess the difference between low-grade CS (LGCS) and high-grade CS (HGCS). MATERIALS AND METHODS: Thirty-one patients with histopathologically confirmed central para-acetabular CSs (6 LGCS and 25 HGCS) were retrospectively reviewed. Image features were evaluated for the following: cortical destruction, tumor border and pattern, calcification mode, soft-tissue mass, density/signal intensity, peritumoral edema, acetabular (cartilage) destruction, diffuse signal changes in acetabulum, mass inside hip joint, femoral head involvement, enhancement manifestations and the maximum length of the tumor...
December 2016: La Radiologia Medica
Masayuki Honda, Aoi Odawara, Ikuro Suzuki, Morio Shimada, Kohki Yoshikawa, Tomoko Okada
A novel conjugate, PHG10 dye, was synthesized using a collagen peptide and a near-infrared (NIR)-responsive dye to achieve targeted cytotoxicity. The collagen peptide motif, -(Pro-Hyp-Gly)10 - (PHG10), was incorporated for targeting collagen fibrils that are excessively produced by activated fibroblasts around tumor cells. PHG10 dye was purified by HPLC and identified by MALDI-MS. The phototoxicity and cytotoxicity of PHG10 dye were examined using human glioma cells (HGCs). Fluorescent images indicated that PHG10 dye preferably assembled to collagen-coated HGCs compared with noncoated HGCs...
September 2016: Photochemistry and Photobiology
Tatsuki Nagasawa, Mari Kawaguchi, Tohru Yano, Kaori Sano, Masataka Okabe, Shigeki Yasumasu
Hatching gland cells (HGCs) originate from different germ layers between frogs and teleosts, although the hatching enzyme genes are orthologous. Teleostei HGCs differentiate in the mesoendodermal cells at the anterior end of the involved hypoblast layer (known as the polster) in late gastrula embryos. Conversely, frog HGCs differentiate in the epidermal cells at the neural plate border in early neurula embryos. To infer the transition in the developmental origin of HGCs, we studied two basal ray-finned fishes, bichir (Polypterus) and sturgeon...
June 2016: Zoological Science
Marina T Guerra, Hayley C Furlong, Wilma G Kempinas, Warren G Foster
Parabens and phthalates are commercial chemicals widely used in the manufacture of industrial and consumer products frequently found as contaminants in biological fluids. We evaluated the effects of di-(2-ethylhexyl) phthalate (DEHP) (ranging from 10(-9) to 10(-7) m [1-100 nm; 0.39-39 ng ml(-1) ]) and butylparaben (BP) (ranging from 10(-8) to 10(-5) m [10 nm-10 μm; 1.9 ng ml(-1) to 1.9 μg ml(-1) ]), alone and in combination, on isolated mouse preantral follicle and human granulosa cell (hGC) cultures to study direct effects on follicle growth and ovarian steroidogenesis...
September 2016: Journal of Applied Toxicology: JAT
Jiaou Zhang, Jiansheng Liu, Kai Zhu, Yan Hong, Yun Sun, Xiaoming Zhao, Yanzhi Du, Zi-Jiang Chen
Brain and muscle ARNT-like protein 1 (BMAL1) is necessary for fertility and has been found to be essential to follicle growth and steroidogenesis. Sirtuin1 (SIRT1) has been reported to interact with BMAL1 and function in a circadian manner. Evidence has shown that SIRT1 regulates aromatase expression in estrogen-producing cells. We aimed to ascertain if there is a relationship between polycystic ovary syndrome (PCOS) and BMAL1, and whether and how BMAL1 takes part in estrogen synthesis in human granulosa cells (hGCs)...
August 2016: Endocrine
Ik Sung Cho, Myeong Ok Cho, Zhengzheng Li, Md Nurunnabi, Sung Young Park, Sun-Woong Kang, Kang Moo Huh
The major limitations of typical thermogelling polymers for practical applications are low gel stability and weak mechanical properties under physiological conditions. In this study, we have synthesized a new polysaccharide-based thermogelling polymer that can be photo-crosslinked by UV irradiation to form a mechanically resilient and elastic hydrogel. Methacrylated hexanoyl glycol chitosan (M-HGC), was synthesized by a series of chemical modifications, N-hexanoylation and N-methacrylation, of glycol chitosan (GC)...
June 25, 2016: Carbohydrate Polymers
Alice Pierre, Anthony Estienne, Chrystèle Racine, Jean-Yves Picard, Renato Fanchin, Belén Lahoz, José Luis Alabart, José Folch, Peggy Jarrier, Stéphane Fabre, Danielle Monniaux, Nathalie di Clemente
CONTEXT: Anti-Müllerian hormone (AMH) is produced by the granulosa cells (GCs) of growing follicles and inhibits follicular development. OBJECTIVE: This study aimed to investigate the regulation of the AMH-specific type 2 receptor (AMHR2) gene expression in GCs by bone morphogenetic protein (BMP)15, BMP4 and growth differentiation factor (GDF)9. DESIGN, SETTING, AND PATIENTS: Their effects on AMHR2 and AMH mRNAs were studied in luteinized human GCs and in ovine GCs (oGCs) from small antral follicles...
June 2016: Journal of Clinical Endocrinology and Metabolism
Sandro Sacchi, Giovanni D'Ippolito, Paola Sena, Tiziana Marsella, Daniela Tagliasacchi, Elena Maggi, Cindy Argento, Alessandra Tirelli, Simone Giulini, Antonio La Marca
PURPOSE: Anti Müllerian Hormone (AMH) has a negative and inhibitory role in many functions of human granulosa-lutein cells (hGCs) including notoriously the reduction of the aromatase CYP19A1 expression induced by follicle-stimulating hormone (FSH). No data have been provided on the possible role of AMH in modulating the response to luteinizing hormone (LH) (alone or combined with FSH) as well as its effect on other enzymes involved in steroidogenesis including aromatase P450scc. The aim of this study was to investigate the role of AMH as regulator of the basal and stimulated steroids production by hGCs...
January 2016: Journal of Assisted Reproduction and Genetics
Vinita Periwal, Ashok Patowary, Shamsudheen Karuthedath Vellarikkal, Anju Gupta, Meghna Singh, Ashish Mittal, Shamini Jeyapaul, Rajendra Kumar Chauhan, Ajay Vir Singh, Pravin Kumar Singh, Parul Garg, Viswa Mohan Katoch, Kiran Katoch, Devendra Singh Chauhan, Sridhar Sivasubbu, Vinod Scaria
The tubercle complex consists of closely related mycobacterium species which appear to be variants of a single species. Comparative genome analysis of different strains could provide useful clues and insights into the genetic diversity of the species. We integrated genome assemblies of 96 strains from Mycobacterium tuberculosis complex (MTBC), which included 8 Indian clinical isolates sequenced and assembled in this study, to understand its pangenome architecture. We predicted genes for all the 96 strains and clustered their respective CDSs into homologous gene clusters (HGCs) to reveal a hard-core, soft-core and accessory genome component of MTBC...
2015: PloS One
Ji Yeon Lee, Eun-Ju Ko, Ki Duck Ahn, Sung Kim, Poong-Lyul Rhee
Changes in resting membrane potential (RMP) regulate membrane excitability. K(+) conductance(s) are one of the main factors in regulating RMP. The functional role of K(+) conductances has not been studied the in human gastric corpus smooth muscles (HGCS). To examine the role of K(+) channels in regulation of RMP in HGCS we employed microelectrode recordings, patch-clamp, and molecular approaches. Tetraethylammonium and charybdotoxin did not affect the RMP, suggesting that BK channels are not involved in regulating RMP...
April 1, 2015: American Journal of Physiology. Gastrointestinal and Liver Physiology
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