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https://www.readbyqxmd.com/read/30009829/keratinocyte-cytokine-networks-associated-with-human-melanocytic-nevus-development
#1
Arash Chitsazan, Pamela Mukhopadhyay, Blake Ferguson, Herlina Y Handoko, Graeme J Walker
Melanocytes can group together in nevi, commonly thought to form due to intrinsic somatic mutations involving MAPK pathway activation. However, the role of the microenvironment, in particular keratinocytes, in nevogenesis, is rarely studied. Melanocytes proliferate during the hair follicle growth phase and in some basal cell carcinomas, allowing us to construct keratinocyte gene expression clusters correlated with melanocyte activation. We asked whether such correlations are evident in the more subtle context of regulation of melanocyte behaviour in normal skin...
July 13, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29776717/m2-macrophages-promote-wound-induced-hair-neogenesis
#2
Akira Kasuya, Taisuke Ito, Yoshiki Tokura
BACKGROUND: De novo hair regeneration occurs in scars of normal adult mice. This interesting phenomenon is termed as wound-induced hair neogenesis (WIHN). We hypothesized that M2 macrophages are crucially involved in WIHN. OBJECTIVE: To clarify the contribution of M2 macrophages to WIHN. METHOD: We established a mouse model of WIHN. A full thickness skin excision was implemented on the back of C57BL/6 (B6) mice. Newly developing hair follicles were detected by a whole-mount assay...
May 12, 2018: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29392781/activated-receptor-tyrosine-kinases-in-granulosa-cells-of-ovulating-follicles-in-mice
#3
Yasmin Schuermann, Dayananda Siddappa, Melissa Pansera, Raj Duggavathi
Successful ovulation requires the actions of gonadotropins along with those mediated by growth factors binding to their receptor tyrosine kinases (RTKs). There are several growth factors such as epidermal growth factor family ligands and interleukins that play a role during ovulation initiated by the preovulatory surge of luteinizing hormone (LH). The aim of this project was to analyze growth factor signaling pathways induced by LH in mouse granulosa cells. Immature female mice were treated with equine chorionic gonadotropin (eCG) followed 48 hr later by human chorionic gonadotropin (hCG) to induce follicular growth and ovulation...
April 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29385487/microrna-221-expression-in-theca-and-granulosa-cells-hormonal-regulation-and-function
#4
Cheyenne L Robinson, Lingna Zhang, Luis F Schütz, Morgan L Totty, Leon J Spicer
Small noncoding RNA molecules (miRNA) regulate protein levels in a post-transcriptional manner by partial base pairing to the 3'-UTR of target genes thus mediating degradation or translational repression. Previous studies indicate that numerous miRNA regulate the biosynthesis of intraovarian hormones, and emerging evidence indicates that one of these, miRNA-221 (MIR221), may be a modulator of ovarian function. However, the hormonal control of ovarian MIR221 is not known. The objectives of this study were to investigate the developmental and hormonal regulation of MIR221 expression in granulosa (GC) and theca cell (TC) and its possible role in regulating follicular function...
March 6, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/28238531/fibroblast-growth-factor-2-fgf2-and-vascular-endothelial-growth-factor-a-vegfa-synergistically-promote-steroidogenesis-and-survival-of-cultured-buffalo-granulosa-cells
#5
S R Mishra, Jaya Bharati, G Rajesh, V S Chauhan, G Taru Sharma, S Bag, V P Maurya, G Singh, M Sarkar
The present study investigated the combined effect of fibroblast growth factor 2 (FGF2) and vascular endothelial growth factor A (VEGF-A) on estradiol (E2) secretion and relative abundance of mRNA for aromatase enzyme (CYP19A1), proliferating cell nuclear antigen (PCNA) and BCL-2 associated X protein (BAX) in cultured buffalo granulosa cells (GCs). Follicles were isolated and classified into four groups based on size and E2 concentration in follicular fluid (FF): Small, 4-6mm diameter, E2<0.5ng/ml; Medium, 7-9mm, E2=0...
April 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/27663377/expression-and-localization-of-fibroblast-growth-factor-fgf-family-in-buffalo-ovarian-follicle-during-different-stages-of-development-and-modulatory-role-of-fgf2-on-steroidogenesis-and-survival-of-cultured-buffalo-granulosa-cells
#6
S R Mishra, N Thakur, A Somal, M S Parmar, R Reshma, G Rajesh, V P Yadav, M K Bharti, Jaya Bharati, A Paul, V S Chouhan, G T Sharma, G Singh, M Sarkar
The present study investigated the expression and localization of FGF and its functional receptors in the follicle of buffalo and the treatment of FGF2 on mRNA expression of CYP19A1 (aromatase), PCNA, and BAX (BCL-2 associated X protein) in cultured buffalo granulosa cells (GCs). Follicles were classified into four groups based on size and E2 level in follicular fluid (FF): F1, 4-6mm diameter, E2<0.5ng/ml of FF; F2, 7-9mm, E2=0.5-5ng/ml; F3, 10-13mm, E2=5-40ng/ml; F4, >14mm, E2>180ng/ml. The qPCR studies revealed that the mRNA expression of FGF1, FGF2 and FGF7 were maximum (P<0...
October 2016: Research in Veterinary Science
https://www.readbyqxmd.com/read/27483256/vegf-and-fgf2-improve-revascularization-survival-and-oocyte-quality-of-cryopreserved-subcutaneously-transplanted-mouse-ovarian-tissues
#7
Sheng-Hsiang Li, Yuh-Ming Hwu, Chung-Hao Lu, Hsiao-Ho Chang, Cheng-En Hsieh, Robert Kuo-Kuang Lee
This study was conducted to investigate the effect of the vascular endothelial growth factor (VEGF) and fibroblast growth factor 2 (FGF2) on revascularization, survival, and oocyte quality of cryopreserved, subcutaneously-transplanted mouse ovarian tissue. Autologous subcutaneous transplantation of vitrified-thawed mouse ovarian tissues treated with (experimental group) or without (control group) VEGF and FGF2 was performed. After transplantation to the inguinal region for two or three weeks, graft survival, angiogenesis, follicle development, and oocyte quality were examined after gonadotropin administration...
July 30, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27177965/luteal-angiogenesis-and-its-control
#8
REVIEW
Kathryn J Woad, Robert S Robinson
Angiogenesis, the formation of new blood vessels from preexisting ones, is critical to luteal structure and function. In addition, it is a complex and tightly regulated process. Not only does rapid and extensive angiogenesis occur to provide the corpus luteum with an unusually high blood flow and support its high metabolic rate, but in the absence of pregnancy, the luteal vasculature must rapidly regress to enable the next cycle of ovarian activity. This review describes a number of key endogenous stimulatory and inhibitory factors, which act in a delicate balance to regulate luteal angiogenesis and ultimately luteal function...
July 1, 2016: Theriogenology
https://www.readbyqxmd.com/read/26542145/mechanisms-of-fibroblast-growth-factor-signaling-in-the-ovarian-follicle
#9
REVIEW
Christopher A Price
Fibroblast growth factors (FGFs) have been shown to alter growth and differentiation of reproductive tissues in a variety of species. Within the female reproductive tract, the effects of FGFs have been focused on the ovary, and the most studied one is FGF2, which stimulates granulosa cell proliferation and decreases differentiation (decreased steroidogenesis). Other FGFs have also been implicated in ovarian function, and this review summarizes the effects of members of two subfamilies on ovarian function; the FGF7 subfamily that also contains FGF10, and the FGF8 subfamily that also contains FGF18...
February 2016: Journal of Endocrinology
https://www.readbyqxmd.com/read/25975959/synergistic-effect-of-pdgf-and-fgf2-for-cell-proliferation-and-hair-inductive-activity-in-murine-vibrissal-dermal-papilla-in-vitro
#10
Masahiro Kiso, Tatsuo S Hamazaki, Munenari Itoh, Sota Kikuchi, Hidemi Nakagawa, Hitoshi Okochi
BACKGROUND: The dermal papilla is composed of a small clump of mesenchymal cells, called dermal papilla cells (DPCs). DPCs closely interact with epidermal cells to give rise to hair follicles and shafts during hair follicle development and the hair cycle. DPCs are promising cell sources for hair regeneration therapy for alopecia patients. However, once DPCs are put into conventional two-dimensional culture conditions, they quickly lose their capability to produce hair follicles. OBJECTIVE: We aimed to expand a sufficiently large population of DPCs that retain their hair inductive activity...
August 2015: Journal of Dermatological Science
https://www.readbyqxmd.com/read/25889399/molecular-mechanisms-of-enhancing-porcine-granulosa-cell-proliferation-and-function-by-treatment-in-vitro-with-anti-inhibin-alpha-subunit-antibody
#11
Liuping Cai, Aidong Sun, Hui Li, Anastasia Tsinkgou, Jianning Yu, Shijia Ying, Zhe Chen, Zhendan Shi
BACKGROUND: This study was conducted to clarify the effect of the inhibiting action of inhibin on porcine granulosa cell proliferation and function, and to investigate the underlying intracellular regulatory molecular mechanisms. METHODS: Porcine granulosa cells were cultured in vitro, and were treated with an anti-inhibin alpha subunit antibody, with or without co-treatment of follicle-stimulating hormone (FSH) in the culture medium. RESULTS: Treatment with anti-inhibin alpha subunit antibody led to a significant increase in estradiol (E2) secretion and cell proliferation...
2015: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/25411391/the-role-of-fibroblast-growth-factor-18-in-follicular-atresia-in-cattle
#12
Valério M Portela, Essa Dirandeh, Hilda M Guerrero-Netro, Gustavo Zamberlam, Marcos H Barreta, André F Goetten, Christopher A Price
Although the various members of the fibroblast growth factor (FGF) family are generally mitotic, one member, FGF18, has been shown to increase the rate of apoptosis of ovarian granulosa cells. In the present study, we first determined whether granulosa cells express FGF18 and we then explored the mechanism through which FGF18 increases apoptosis in vitro. Under culture conditions that favored estradiol secretion and CYP19A1 expression, granulosa FGF18 mRNA levels were barely detectable; however, withdrawing gonadotropic support (follicle-stimulating hormone or insulin-like growth factor 1) reduced levels of CYP19A1 mRNA and increased abundance of mRNA encoding the death ligand FASLG and FGF18...
January 2015: Biology of Reproduction
https://www.readbyqxmd.com/read/25353724/mesenchymal-stem-cells-enhance-angiogenesis-and-follicle-survival-in-human-cryopreserved-ovarian-cortex-transplantation
#13
Xi Xia, Tailang Yin, Jie Yan, Liying Yan, Chao Jin, Cuilin Lu, Tianren Wang, Xiaohui Zhu, Xu Zhi, Jijun Wang, Lei Tian, Jing Liu, Rong Li, Jie Qiao
Transplantation of cryopreserved ovarian tissue is a novel technique to restore endocrine function and fertility especially for cancer patients. However, the main obstacle of the technique is massive follicle loss as a result of ischemia in the process of transplantation. Mesenchymal stem cells (MSCs) have been acknowledged to play an important role in supporting angiogenesis and stabilizing long-lasting blood vessel networks through release of angiogenic factors and differentiation into pericytes and endothelial cells...
2015: Cell Transplantation
https://www.readbyqxmd.com/read/24988999/physiological-functions-and-underlying-mechanisms-of-fibroblast-growth-factor-fgf-family-members-recent-findings-and-implications-for-their-pharmacological-application
#14
REVIEW
Toru Imamura
Despite their name, fibroblast growth factors (FGFs) are multifunctional regulators affecting a wide variety of physiological events. This review summarizes our recent studies on FGFs from mechanistic, physiological and application-oriented viewpoints. These include studies on the importance of βKlotho and glycosaminoglycans for the signaling of hormonal FGFs (FGF21 and FGF19); the physiological role of a paracrine FGF (FGF18) in hair cycle regulation; and the development of a stable, chimeric FGF protein composed of FGF1 and FGF2 domains suitable for radioprotection...
2014: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/24907656/egf-fgf2-stimulates-the-proliferation-and-improves-the-neuronal-commitment-of-mouse-epidermal-neural-crest-stem-cells-epi-ncscs
#15
Raul Bardini Bressan, Fernanda Rosene Melo, Patricia Alves Almeida, Denise Avani Bittencourt, Silvia Visoni, Talita Silva Jeremias, Ana Paula Costa, Rodrigo Bainy Leal, Andrea Gonçalves Trentin
Epidermal neural crest stem cells (EPI-NCSCs), which reside in the bulge of hair follicles, are attractive candidates for several applications in cell therapy, drug screening and tissue engineering. As suggested remnants of the embryonic neural crest (NC) in an adult location, EPI-NCSCs are able to generate a wide variety of cell types and are readily accessible by a minimally invasive procedure. Since the combination of epidermal growth factor (EGF) and fibroblast growth factor type 2 (FGF2) is mitogenic and promotes the neuronal commitment of various stem cell populations, we examined its effects in the proliferation and neuronal potential of mouse EPI-NCSCs...
September 10, 2014: Experimental Cell Research
https://www.readbyqxmd.com/read/24724084/expression-of-mesenchymal-stem-cells-related-genes-and-plasticity-of-aspirated-follicular-cells-obtained-from-infertile-women
#16
Edo Dzafic, Martin Stimpfel, Srdjan Novakovic, Petra Cerkovnik, Irma Virant-Klun
After removal of oocytes for in vitro fertilization, follicular aspirates which are rich in somatic follicular cells are discarded in daily medical practice. However, there is some evidence that less differentiated cells with stem cell characteristics are present among aspirated follicular cells (AFCs). The aim of this study was to culture AFCs in vitro and to analyze their gene expression profile. Using the RT2 Profiler PCR array, we investigated the expression profile of 84 genes related to stemness, mesenchymal stem cells (MCSs), and cell differentiation in AFCs enriched by hypoosmotic protocol from follicular aspirates of infertile women involved in assisted reproduction programme in comparison with bone marrow-derived mesenchymal stem cells (BM-MSCs) and fibroblasts...
2014: BioMed Research International
https://www.readbyqxmd.com/read/24337679/mathematical-analysis-of-a-model-for-the-growth-of-the-bovine-corpus-luteum
#17
Sotiris A Prokopiou, Helen M Byrne, Mike R Jeffrey, Robert S Robinson, George E Mann, Markus R Owen
The corpus luteum (CL) is an ovarian tissue that grows in the wound space created by follicular rupture. It produces the progesterone needed in the uterus to maintain pregnancy. Rapid growth of the CL and progesterone transport to the uterus require angiogenesis, the creation of new blood vessels from pre-existing ones, a process which is regulated by proteins that include fibroblast growth factor 2 (FGF2). In this paper we develop a system of time-dependent ordinary differential equations to model CL growth...
December 2014: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/24287035/impact-of-angiogenic-and-innate-immune-systems-on-the-corpus-luteum-function-during-its-formation-and-maintenance-in-ruminants
#18
REVIEW
Akio Miyamoto, Koumei Shirasuna, Takashi Shimizu, Motozumi Matsui
The corpus luteum (CL) is formed from an ovulated follicle, and grows rapidly to secrete progesterone (P4) thereby supporting implantation and maintenance of pregnancy. It is now evident that angiogenesis is necessary to form the structure of the developing CL as well as to acquire the steroidogenic capacity to secrete large amounts of P4. It is of interest that the increases in CL size, plasma P4 concentration and luteal blood flow are occurring in parallel during the first seven days after ovulation. Angiogenic factors, such as vascular endothelial growth factor-A (VEGFA) and basic fibroblast growth factor (FGF2), play a central role in promoting cell proliferation and angiogenesis in the developing CL...
December 2013: Reproductive Biology
https://www.readbyqxmd.com/read/24209507/fsh-up-regulates-angiogenic-factors-in-luteal-cells-of-buffaloes
#19
L A Fátima, M C Evangelista, R S Silva, A P M Cardoso, P S Baruselli, P C Papa
Follicle-stimulating hormone has been widely used to induce superovulation in buffaloes and cows and usually triggers functional and morphologic alterations in the corpus luteum (CL). Several studies have shown that FSH is involved in regulating vascular development and that adequate angiogenesis is essential for normal luteal development. Angiogenesis is regulated by many growth factors, of which vascular endothelial growth factor (VEGF) and fibroblast growth factor 2 (FGF2) have an established central role...
November 2013: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/23875758/gene-bionetworks-that-regulate-ovarian-primordial-follicle-assembly
#20
Eric Nilsson, Bin Zhang, Michael K Skinner
BACKGROUND: Primordial follicle assembly is the process by which ovarian primordial follicles are formed. During follicle assembly oocyte nests break down and a layer of pre-granulosa cells surrounds individual oocytes to form primordial follicles. The pool of primordial follicles formed is the source of oocytes for ovulation during a female's reproductive life. RESULTS: The current study utilized a systems approach to detect all genes that are differentially expressed in response to seven different growth factor and hormone treatments known to influence (increase or decrease) primordial follicle assembly in a neonatal rat ovary culture system...
2013: BMC Genomics
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