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C-kit AND SCF

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https://www.readbyqxmd.com/read/28045993/change-in-the-interstitial-cells-of-cajal-and-nnos-positive-neuronal-cells-with-aging-in-the-stomach-of-f344-rats
#1
Yong Hwan Kwon, Nayoung Kim, Ryoung Hee Nam, Ji Hyun Park, Sun Min Lee, Sung Kook Kim, Hye Seung Lee, Yong Sung Kim, Dong Ho Lee
The gastric accommodation reflex is an important mechanism in gastric physiology. However, the aging-associated structural and functional changes in gastric relaxation have not yet been established. Thus, we evaluated the molecular changes of interstitial cell of Cajal (ICC) and neuronal nitric oxide synthase (nNOS) and the function changes in the corpus of F344 rats at different ages (6-, 31-, 74-wk and 2-yr). The proportion of the c-Kit-positive area in the submucosal border (SMB) and myenteric plexus (MP) layer was significantly lower in the older rats, as indicated by immunohistochemistry...
2017: PloS One
https://www.readbyqxmd.com/read/28009085/protein-tyrosine-phosphatase-prl2-mediates-notch-and-kit-signals-in-early-t-cell-progenitors
#2
Michihiro Kobayashi, Sarah Nabinger, Yunpeng Bai, Momoko Yoshimoto, Rui Gao, Sisi Chen, Chonghua Yao, Yuanshu Dong, Lujuan Zhang, Sonia Rodriguez, Yumi Yashiro-Ohtani, Warren S Pear, Nadia Carlesso, Mervin C Yoder, Reuben Kapur, Mark H Kaplan, H Daniel Lacorazza, Zhong-Yin Zhang, Yan Liu
The molecular pathways regulating lymphoid priming, fate, and development of multipotent bone marrow hematopoietic stem and progenitor cells (HSPCs) that continuously feed thymic progenitors remain largely unknown. While Notch signal is indispensable for T cell specification and differentiation, the downstream effectors are not well understood. PRL2, a protein tyrosine phosphatase that regulates hematopoietic stem cell proliferation and self-renewal, is highly expressed in murine thymocyte progenitors. Here we demonstrate that protein tyrosine phosphatase PRL2 and receptor tyrosine kinase c-Kit are critical downstream targets and effectors of the canonical Notch/RBPJ pathway in early T cell progenitors...
December 23, 2016: Stem Cells
https://www.readbyqxmd.com/read/27890784/identifying-residues-that-determine-scf-molecular-level-interactions-through-a-combination-of-experimental-and-in-silico-analyses
#3
Eitan Rabinovich, Michael Heyne, Anna Bakhman, Mickey Kosloff, Julia M Shifman, Niv Papo
The stem cell factor (SCF)/c-Kit receptor tyrosine kinase complex-with its significant roles in hematopoiesis and angiogenesis-is an attractive target for rational drug design. There is thus a need to map, in detail, the SCF/c-Kit interaction sites and the mechanisms that modulate this interaction. While most residues in the direct SCF/c-Kit binding interface can be identified from the existing crystal structure of the complex, other residues that affect binding through protein unfolding, intermolecular interactions, allosteric or long-distance electrostatic effects cannot be directly inferred...
January 6, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/27872880/data-on-quantification-of-signaling-pathways-activated-by-kit-and-pdgfra-mutants
#4
Christelle Bahlawane, Martine Schmitz, Elisabeth Letellier, Karthik Arumugam, Nathalie Nicot, Petr V Nazarov, Serge Haan
The present data are related to the article entitled "Insights into ligand stimulation effects on gastro-intestinal stromal tumors signaling" (C. Bahlawane, M. Schmitz, E. Letellier, K. Arumugam, N. Nicot, P.V. Nazarov, S. Haan, 2016) [1]. Constitutive and ligand-derived signaling pathways mediated by KIT and PDGFRA mutated proteins found in gastrointestinal stromal tumors (GIST) were compared. Expression of mutant proteins was induced by doxycycline in an isogenic background (Hek293 cells). Kit was identified by FACS at the cell surface and found to be quickly degraded or internalized upon SCF stimulation for both Kit Wild type and Kit mutant counterparts...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27825164/effect-of-neutrophils-on-gallbladder-interstitial-cajal-like-cells-in-guinea-pig-model-of-acute-cholecystitis
#5
Zhen-Peng Huang, Hu Qiu, Yan Yang, Bao-Ping Yu
BACKGROUND: Acute cholecystitis is a common condition in gallbladder motility disorder. Interstitial Cajal-like cells (ICLCs) in the gallbladder are known as one of the players in the complex motility mechanisms affecting gallbladder motility. AIM: This study explored morphological symptoms and molecular mechanisms underlying gallbladder ICLC changes induced by acute cholecystitis. MATERIALS AND METHODS: Fifteen adult guinea pigs were randomly divided into 3 groups: sham-operated group (healthy controls) and 2 experimental groups wherein these guinea pigs were subjected to common bile duct ligation to induce acute cholecystitis...
2016: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/27798921/low-mast-cell-density-predicts-poor-prognosis-in-oral-squamous-cell-carcinoma-and-reduces-survival-in-head-and-neck-squamous-cell-carcinoma
#6
Cecilie Gjøvaag Attramadal, Sheeba Kumar, Jian Gao, Morten Ebbe Boysen, Trond Sundby Halstensen, Magne Bryne
BACKGROUND: The cellular composition of the tumor microenvironment (TME) at the invading front of oral squamous cell carcinomas (OSCCs) may reflect biologically important cancer features and host responses, and thus be related to disease progression. The TME density of mast cells (MCs), macrophages, cancer-associated fibroblasts (CAFs) and endothelial cells were quantified at the invasive front and analyzed regarding their relation to disease recurrence in patients with small T1/2N0M0 OSCCs...
2016: Anticancer Research
https://www.readbyqxmd.com/read/27782131/in-vivo-correction-of-anaemia-in-%C3%AE-thalassemic-mice-by-%C3%AE-pna-mediated-gene-editing-with-nanoparticle-delivery
#7
Raman Bahal, Nicole Ali McNeer, Elias Quijano, Yanfeng Liu, Parker Sulkowski, Audrey Turchick, Yi-Chien Lu, Dinesh C Bhunia, Arunava Manna, Dale L Greiner, Michael A Brehm, Christopher J Cheng, Francesc López-Giráldez, Adele Ricciardi, Jagadish Beloor, Diane S Krause, Priti Kumar, Patrick G Gallagher, Demetrios T Braddock, W Mark Saltzman, Danith H Ly, Peter M Glazer
The blood disorder, β-thalassaemia, is considered an attractive target for gene correction. Site-specific triplex formation has been shown to induce DNA repair and thereby catalyse genome editing. Here we report that triplex-forming peptide nucleic acids (PNAs) substituted at the γ position plus stimulation of the stem cell factor (SCF)/c-Kit pathway yielded high levels of gene editing in haematopoietic stem cells (HSCs) in a mouse model of human β-thalassaemia. Injection of thalassemic mice with SCF plus nanoparticles containing γPNAs and donor DNAs ameliorated the disease phenotype, with sustained elevation of blood haemoglobin levels into the normal range, reduced reticulocytosis, reversal of splenomegaly and up to 7% β-globin gene correction in HSCs, with extremely low off-target effects...
October 26, 2016: Nature Communications
https://www.readbyqxmd.com/read/27707610/aberrant-expressions-of-stem-cell-factor-c-kit-in-rat-testis-with-varicocele
#8
Qin Qin, Jianrong Liu, Yuehong Ma, Yimin Wang, Fang Zhang, Songdan Gao, Lina Dong
BACKGROUND/PURPOSE: Varicocele (VC) is considered by the World Health Organization as the main cause of male infertility. Studies have shown that VC can affect spermatogenesis and then result in male infertility. But the exact mechanism by which VC affects spermatogenesis is still unclear. Stem cell factor (SCF) and c-KIT receptor are crucial molecules during spermatogenesis in testis. This study aims to investigate whether SCF/c-KIT signaling is involved in the pathophysiology of VC on spermatogenesis...
October 2, 2016: Journal of the Formosan Medical Association, Taiwan Yi Zhi
https://www.readbyqxmd.com/read/27606906/positive-oct-3-4-and-d2-40-immunohistochemical-expression-in-germ-cells-and-suspected-histology-pattern-of-intratubular-germ-cell-neoplasia-in-boys-with-cryptorchidism-vanish-after-the-age-of-2-years
#9
Jorgen Thorup, Erik Clasen-Linde, Dina Cortes
Introduction Intratubular germ cell neoplasia (ITGCN) is a precursor to testicular germ cell cancer. Adult germ cell cancer immunohistochemical markers may fail to detect ITGCN in prepubertal boys with congenital cryptorchidism, because positive immunohistochemistry is commonly seen in boys younger than the age of 2 years, where most orchiopexies are performed. The aim of the study was to evaluate the diagnostic challenge to differentiate between a histological pattern of ITGCN and a histological pattern with some atypical germ cells and all positive cancer immunohistochemical markers, but no increased risk of malignancy...
September 8, 2016: European Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27539014/enhanced-hematopoietic-stem-cell-self-renewal-promoting-ability-of-clonal-primary-mesenchymal-stromal-stem-cells-versus-their-osteogenic-progeny
#10
Qiling He, Claude Scott Swindle, Chao Wan, Robert J Flynn, Robert A Oster, Dongquan Chen, Fengjie Zhang, Yinglan Shu, Christopher A Klug
Long-term self-renewing hematopoietic stem cell (LT-HSC) homeostasis within the bone marrow (BM) of adult mammals is regulated by complex interactions between LT-HSC and a number of niche-associated cell types including mesenchymal stromal/stem cells (MSC), osteoblasts (OB), macrophage, and neuronal cells in close proximity with the vasculature. Here, we cloned and functionally characterized a murine BM MSC subpopulation that was uniformly Nestin(+) Lepr (+) Sca-1(+) CD146(+) and could be stably propagated with high colony-forming unit fibroblast re-cloning efficiency...
August 19, 2016: Stem Cells
https://www.readbyqxmd.com/read/27478893/total-glucosides-of-paeony-promote-intestinal-motility-in-slow-transit-constipation-rats-through-amelioration-of-interstitial-cells-of-cajal
#11
Feiye Zhu, Shan Xu, Yongsheng Zhang, Fangming Chen, Jinjun Ji, Guanqun Xie
OBJECTIVES: Using an atropine-diphenoxylate-induced slow transit constipation (STC) model, this study explored the effects of the total glucosides of paeony (TGP) in the treatment of STC and the possible mechanisms. STUDY DESIGN: A prospective experimental animal study. METHODS: The constipation model was set up in rats with an oral gavage of atropine-diphenoxylate and then treated with the TGP. The volume and moisture content of the faeces were observed and the intestinal kinetic power was evaluated...
2016: PloS One
https://www.readbyqxmd.com/read/27451973/a-novel-slug-containing-negative-feedback-loop-regulates-scf-c-kit-mediated-hematopoietic-stem-cell-self-renewal
#12
Z Zhang, P Zhu, Y Zhou, Y Sheng, Y Hong, D Xiang, Z Qian, J Mosenson, W-S Wu
The SCF/c-Kit pathway has crucial roles in controlling hematopoietic stem cell (HSC) renewal. However, little is known about the intracellular regulation of the SCF/c-Kit pathway in HSCs. We report here that Slug, a zinc-finger transcription repressor, functions as a direct transcriptional repressor of c-Kit in HSCs. Conversely, SCF/c-Kit signaling positively regulates Slug through downstream c-Myc and FoxM1 transcription factors. Intriguingly, c-Kit expression is induced by SCF/c-Kit signaling in Slug-deficient HSCs...
July 25, 2016: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/27451100/molecular-signaling-pathways-controlling-vascular-tube-morphogenesis-and-pericyte-induced-tube-maturation-in-3d-extracellular-matrices
#13
S L K Bowers, P R Norden, G E Davis
During capillary network formation, ECs establish interconnecting tubes with defined lumens that reside within vascular guidance tunnels (physical spaces generated during EC tubulogenesis). Pericytes are recruited to EC tubes within these tunnels and capillary basement membrane deposition occurs to facilitate tube maturation. Here, we discuss molecular mechanisms controlling EC tubulogenesis demonstrating the involvement of integrins, MT1-MMP, extracellular matrix, Cdc42, Rac1, Rac2, k-Ras, Rap1b, and key downstream effectors including Pak2, Pak4, IQGAP1, MRCKβ, and Rasip1...
2016: Advances in Pharmacology
https://www.readbyqxmd.com/read/27340921/impact-of-the-scf-signaling-pathway-on-leukemia-stem-cell-mediated-atl-initiation-and-progression-in-an-hbz-transgenic-mouse-model
#14
Wakako Kuribayashi, Kazuya Takizawa, Kenji Sugata, Madoka Kuramitsu, Haruka Momose, Eita Sasaki, Yuki Hiradate, Keiko Furuhata, Yoshihisa Asada, Atsushi Iwama, Masao Matsuoka, Takuo Mizukami, Isao Hamaguchi
Adult T-cell leukemia (ATL) is a malignant disease caused by human T-lymphotropic virus type 1. In aggressive ATL, the response to chemotherapy is extremely poor. We hypothesized that this poor response is due to the existence of chemotherapy-resistant cells, such as leukemic stem cells. Previously, we successfully identified an ATL stem cell (ATLSC) candidate as the c-kit+/CD38-/CD71- cells in an ATL mouse model using Tax transgenic mice. Here, with a new ATL mouse model using HBZ-transgenic mice, we further discovered that the functional ATLSC candidate, which commonly expresses c-kit, is drug-resistant and has the ability to initiate tumors and reconstitute lymphomatous cells...
August 9, 2016: Oncotarget
https://www.readbyqxmd.com/read/27340351/long-pulse-gastric-electrical-stimulation-protects-interstitial-cells-of-cajal-in-diabetic-rats-via-igf-1-signaling-pathway
#15
Hai Li, Yan Chen, Shi Liu, Xiao-Hua Hou
AIM: To investigate the effects of different parameters of gastric electrical stimulation (GES) on interstitial cells of Cajal (ICCs) and changes in the insulin-like growth factor 1 (IGF-1) signal pathway in streptozotocin-induced diabetic rats. METHODS: Male rats were randomized into control, diabetic (DM), diabetic with sham GES (DM + SGES), diabetic with GES1 (5.5 cpm, 100 ms, 4 mA) (DM + GES1), diabetic with GES2 (5.5 cpm, 300 ms, 4 mA) (DM + GES2) and diabetic with GES3 (5...
June 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/27330532/mast-cell-targeted-strategies-in-cancer-therapy
#16
REVIEW
Michele Ammendola, Rosario Sacco, Giuseppe Sammarco, Maria Luposella, Rosa Patruno, Cosmo Damiano Gadaleta, Giovambattista De Sarro, Girolamo Ranieri
Mast cells (MCs) are cells that originate in the bone marrow from pluripotent CD34+ hematopoietic stem cells. Precursors of MCs migrate through the circulation to their target tissues, completing their maturation process into granulated cells under the influence of several microenvironment growth factors. The most important of these factors is the ligand for the c-Kit receptor (c-Kit-R) namely stem cell factor (SCF), secreted mainly by fibroblasts and endothelial cells (ECs). SCF also regulates development, survival and de novo proliferation of MCs...
March 2016: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/27323927/mir-137-affects-melanin-synthesis-in-mouse-melanocyte-by-repressing-the-expression-of-c-kit-and-tyrp2-in-scf-c-kit-signaling-pathway
#17
Shan Jiang, Xiuju Yu, Changsheng Dong
Previously, we created miR-137 overexpressing transgenic mice that produced lighten color phenotypes including gray mice phenotype. However, the miR-137 functional role in coat color regulation is still not well understood. In this study, the quantity of melanin granule and the relative expression of TYRP2 in gray miR-137 overexpression transgenic mouse skin were significantly lower than that in C57BL/6J black mouse skin. The mRNA and protein expression level of c-Kit and c-Kit downstream gene Tyrp2 in miR-137 expression plasmid-transfected melanocytes were significantly down-regulated comparing with that of the control melanocytes...
June 21, 2016: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/27292026/a-positive-tgf-%C3%AE-c-kit-feedback-loop-drives-tumor-progression-in-advanced-primary-liver-cancer
#18
Andres Rojas, Pingyu Zhang, Ying Wang, Wai Chin Foo, Nina M Muñoz, Lianchun Xiao, Jing Wang, Gregory J Gores, Mien-Chie Hung, Boris Blechacz
UNLABELLED: Hepatocellular carcinoma (HCC) is globally the second most common cause of cancer mortality. The majority of HCC patients are diagnosed at advanced stage disease for which no curative treatments exist. TGF-β has been identified as a potential therapeutic target. However, the molecular mechanisms mediating its functional switch from a tumor suppressor to tumor promoter in HCC and its interactions with other signaling pathways are poorly understood. Here, we demonstrate an aberrant molecular network between the TGF-β and c-KIT pathway that mediates the functional switch of TGF-β to a driver of tumor progression in HCC...
June 2016: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/27279472/stem-cell-factor-promotes-in-vitro-ovarian-follicle-development-in-the-domestic-cat-by-upregulating-c-kit-mrna-expression-and-stimulating-the-phosphatidylinositol-3-kinase-akt-pathway
#19
Paweena Thuwanut, Pierre Comizzoli, David E Wildt, Carol L Keefer, Nucharin Songsasen
In the present study we examined the effects of stem cell factor (SCF; 50 vs 100 ng mL-1) alone or in combination with epidermal growth factor (EGF; 100 ng mL-1) on: (1) the in vitro viability and growth of cat follicles within ovarian cortices; (2) phosphatidylinositol 3-kinase (PI3K)/AKT and mitogen-activated protein kinase (MAPK) phosphorylation; and (3) c-kit and FSH receptor (FSHr) mRNA expression. At 100 ng mL-1, SCF increased (P ≤ 0.05) the percentage and size of secondary follicles after 14 days of in vitro culture and sustained AKT phosphorylation after 3 days incubation...
June 9, 2016: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/27245949/scf-c-kit-transactivates-cxcr4-serine-339-phosphorylation-through-g-protein-coupled-receptor-kinase-6-and-regulates-cardiac-stem-cell-migration
#20
Ke Zuo, Dong Kuang, Ying Wang, Yanli Xia, Weilin Tong, Xiaoyan Wang, Yaobin Chen, Yaqi Duan, Guoping Wang
C-kit positive cardiac stem cells (CSCs) have been shown to contribute to myocardial regeneration after infarction. Previously, we have shown that the c-kit ligand stem cell factor (SCF) can induce CSC migration into the infarcted area during myocardial infarction (MI). However, the precise mechanism involved is not fully understood. In this study, we found that CSCs also express C-X-C chemokine receptor type 4 (CXCR4), which is a typical member of the seven transmembrane-spanning G protein-coupled receptor (GPCR)...
2016: Scientific Reports
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