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C-kit ligand

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https://www.readbyqxmd.com/read/29344901/imaging-characteristics-and-first-experience-of-68ga-thp-psma-a-novel-probe-for-rapid-kit-based-ga-68-labeling-and-pet-imaging-comparative-analysis-with-68ga-psma-i-t
#1
Thorsten Derlin, Sebastian Schmuck, Cathleen Juhl, Steffi Teichert, Johanna Zörgiebel, Hans-Jürgen Wester, Sophie M Schneefeld, Almut C A Walte, James T Thackeray, Tobias L Ross, Frank M Bengel
PURPOSE: [68Ga]Trishydroxypyridinone (THP)-prostate-specific membrane antigen (PSMA) is a novel tracer that can be labeled in one step by cold reconstitution of a kit with unprocessed generator eluate, targeting PSMA via the lysine-urea-glutamate (KuE) motif. The aim of this study was to evaluate the human imaging characteristics of [68Ga]THP-PSMA. PROCEDURES: [68Ga]THP-PSMA positron emission tomography (PET)/x-ray computed tomography (CT) was performed in 25 patients with biochemical recurrence after radical prostatectomy for prostate cancer...
January 17, 2018: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/29344240/cxcl5-as-an-autocrine-or-paracrine-cytokine-is-associated-with-proliferation-and-migration-of-hepatoblastoma-hepg2-cells
#2
Yang Yang, Jie Hou, Mingliang Shao, Wei Zhang, Yaling Qi, Shengnan E, Shuqiu Wang, Hongyu Sui, Dexin Meng, Baixin Wang, Mingfu Wang, Yang Han, Yu Cao, Xiaoqing Huang, Yue Li, Pengxia Zhang, Weiqun Wang
C-X-C motif chemokine ligand 5 (CXCL5) is a CXC-type chemokine that is a crucial inflammatory mediator and a powerful attractant for granulocytic immune cells. Increasing evidence has indicated that CXCL5 is involved in the tumorigenesis of various malignancies. The present investigation demonstrated that CXCL5 was expressed in both hepatoblastoma HepG2 cells and liver stellate LX-2 cells, and CXCL5's receptor C-X-C chemokine receptor type 2 (CXCR2) was expressed in HepG2 cells by reverse transcription-polymerase chain reaction (RT-PCR), western blotting and ELISA assays...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29330760/oxidized-phospholipids-stimulate-production-of-stem-cell-factor-via-nrf2-dependent-mechanisms
#3
Taras Afonyushkin, Olga V Oskolkova, Valery N Bochkov
Receptor tyrosine kinase c-Kit and its ligand stem cell factor (SCF) regulate resident vascular wall cells and recruit circulating progenitors. We tested whether SCF may be induced by oxidized palmitoyl-arachidonoyl-phosphatidylcholine (OxPAPC) known to accumulate in atherosclerotic vessels. Gene expression analysis demonstrated OxPAPC-induced upregulation of SCF mRNA and protein in different types of endothelial cells (ECs). Elevated levels of SCF mRNA were observed in aortas of ApoE-/- knockout mice. ECs produced biologically active SCF because conditioned medium from OxPAPC-treated cells stimulated activation (phosphorylation) of c-Kit in naïve ECs...
January 12, 2018: Angiogenesis
https://www.readbyqxmd.com/read/29328471/prostaglandin-e2-receptor-ep4-is-involved-in-the-cell-growth-and-invasion-of-prostate-cancer-via-the-camp%C3%A2-pka-pi3k%C3%A2-akt-signaling-pathway
#4
Song Xu, Wenquan Zhou, Jingping Ge, Zhengyu Zhang
Prostate cancer (PCa) is one of the most prevalent diagnosed malignancies globally. Previous studies have demonstrated that prostaglandin E2 (PGE2) is closely associated with the tumorigenesis and progression of PCa. However, the underlying molecular mechanisms remain unclear and require further investigation. Matrix metalloproteinases (MMPs), receptor activator of nuclear factor‑κB ligand (RANKL) and runt‑related transcription factor 2 (RUNX2), which are involved in cell growth and bone metastasis, are frequently activated or overexpressed in various types of cancer, including PCa...
January 9, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29296846/macrophages-and-osteoclasts-stem-from-a-bipotent-progenitor-downstream-of-a-macrophage-osteoclast-dendritic-cell-progenitor
#5
Yanling Xiao, Jara Palomero, Joanna Grabowska, Liqin Wang, Iris de Rink, Luuk van Helvert, Jannie Borst
Monocytes/macrophages (MΦs), osteoclasts (OCs), and dendritic cells (DCs) are closely related cell types of high clinical significance, but the exact steps in their lineage commitment are unclear. In studies on MΦ and DC development, OC development is generally not addressed. Furthermore, findings on DC development are confusing, because monocytes can also differentiate into DC-like cells. To resolve these issues, we have examined the development of monocytes/MΦs, OCs, and DCs from common progenitors, using the homeostatic driver cytokines macrophage colony-stimulating factor, RANK ligand (L), and Flt3L...
October 24, 2017: Blood Advances
https://www.readbyqxmd.com/read/29202279/cancer-specific-inhibitory-effects-of-genetically-engineered-stem-cells-expressing-cytosine-deaminase-and-interferon-%C3%AE-against-choriocarcinoma-in-xenografted-metastatic-mouse-models
#6
Gyu-Sik Kim, Jae-Rim Heo, Seung U Kim, Kyung-Chul Choi
Cancer treatments using stem cells expressing therapeutic genes have been identified for various types of cancers. In this study, we investigated inhibitory effects of HB1.F3.CD and HB1.F3.CD.IFN-β cells expressing Escherichia coli cytosine deaminase (CD) and human interferon-β (IFN-β) genes in intravenously (i.v.) injected mice with a metastasis model. In this treatment, pro-drug 5-fluorocytosine (5-FC) is converted to cytotoxic drug 5-fluorouracil by hNSCs expressing the CD gene, which inhibits DNA synthesis in cancer cells...
December 1, 2017: Translational Oncology
https://www.readbyqxmd.com/read/29181223/the-evidence-of-cooperative-binding-of-a-ligand-to-g4-dna
#7
A G Kudrev
Intrinsic constants of the ligand binding with G4 DNA (guanine-rich DNA sequence) using quantitative standards can be convenient providing the assessment for elucidating the possibility of such structures participation in biochemical processes. In the present communication, the hard + soft modelling approach to calculate intrinsic constants of a ligand binding with short DNA molecule, particularly such as G4 DNA, has been proposed. The suggested approach has focused upon the quantitative evaluating of a mutual influence between sites and between bound ligands...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29115622/unbs5162-inhibits-the-proliferation-of-esophageal-cancer-squamous-cells-via-the-pi3k-akt-signaling-pathway
#8
Dan He, Suolin Zhang
C‑X‑C motif chemokine ligand (CXCL) signaling has been demonstrated to be involved in cancer invasion and migration; therefore, CXCL antagonists may serve as anticancer drugs by preventing tumor proliferation. The present study aimed to investigate whether a pan antagonist of CXCLs, UNBS5162, may inhibit esophageal cancer proliferation and to identify the underlying mechanisms. Cell proliferation and cell colony formation results, which were determined by a Cell Counting Kit‑8 assay and crystal violet staining, respectively, demonstrated that UNBS5162 inhibited esophageal cancer cell proliferation...
October 26, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29112292/a-kit-ligand-stem-cell-factor-as-a-possible-mediator-inducing-overactive-bladder
#9
Yasue Kubota, Takashi Hamakawa, Satoshi Osaga, Atsushi Okada, Shuzo Hamamoto, Noriyasu Kawai, Kenjiro Kohri, Takahiro Yasui
OBJECTIVE: To investigate whether c-kit ligand, stem cell factor (SCF) affects the biological behavior of overactive bladder (OAB) and discuss the role of SCF as a possible mediator inducing OAB. MATERIALS AND METHODS: First, we performed an immunohistochemical study to examine the localization of SCF in the guinea pig and human bladder. Next, urinary SCF levels were measured in patients with OAB and in control subjects to evaluate a potential biomarker for the diagnosis of OAB...
November 7, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29089413/transcriptomes-of-major-renal-collecting-duct-cell-types-in-mouse-identified-by-single-cell-rna-seq
#10
Lihe Chen, Jae Wook Lee, Chung-Lin Chou, Anil V Nair, Maria A Battistone, Teodor G Păunescu, Maria Merkulova, Sylvie Breton, Jill W Verlander, Susan M Wall, Dennis Brown, Maurice B Burg, Mark A Knepper
Prior RNA sequencing (RNA-seq) studies have identified complete transcriptomes for most renal epithelial cell types. The exceptions are the cell types that make up the renal collecting duct, namely intercalated cells (ICs) and principal cells (PCs), which account for only a small fraction of the kidney mass, but play critical physiological roles in the regulation of blood pressure, extracellular fluid volume, and extracellular fluid composition. To enrich these cell types, we used FACS that employed well-established lectin cell surface markers for PCs and type B ICs, as well as a newly identified cell surface marker for type A ICs, c-Kit...
November 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29076755/discovery-of-a-cox-2-selective-inhibitor-hit-with-anti-inflammatory-activity-and-gastric-ulcer-protective-effect
#11
Mohamed A Abdelgawad, Rania B Bakr, Ahmed O El-Gendy, Gehan M Kamel, Amany A Azouz, Syed Nasir Abbas Bukhari
AIM: A novel series of 2-arylimino-5-arylidenethiazolidin-4-ones 12a-n were synthesized and all the target compounds were fully characterized by IR, (1)H NMR, (13)C NMR, mass spectroscopy and elemental analysis. Materials & methods: All the target compounds were evaluated for their COX inhibition by enzyme immunoassay kit and in vivo anti-inflammatory activity. RESULTS: Tested compounds were found more potent inhibitors of COX-2 (IC50 = 0.54-3.14 µM) than COX-1 (IC50 = 4...
October 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29069417/conformational-profiling-of-a-g-rich-sequence-within-the-c-kit-promoter
#12
Riccardo Rigo, William L Dean, Robert D Gray, Jonathan B Chaires, Claudia Sissi
G-quadruplexes (G4) within oncogene promoters are considered to be promising anticancer targets. However, often they undergo complex structural rearrangements that preclude a precise description of the optimal target. Moreover, even when solved structures are available, they refer to the thermodynamically stable forms but little or no information is supplied about their complex multistep folding pathway. To shed light on this issue, we systematically followed the kinetic behavior of a G-rich sequence located within the c-KIT proximal promoter (kit2) in the presence of monovalent cations K + and Na + ...
October 23, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29032463/kit-w-sh-mutation-prevents-cancellous-bone-loss-during-calcium-deprivation
#13
Sutada Lotinun, Jaijam Suwanwela, Suchit Poolthong, Roland Baron
Calcium is essential for normal bone growth and development. Inadequate calcium intake increases the risk of osteoporosis and fractures. Kit ligand/c-Kit signaling plays an important role in regulating bone homeostasis. Mice with c-Kit mutations are osteopenic. The present study aimed to investigate whether impairment of or reduction in c-Kit signaling affects bone turnover during calcium deprivation. Three-week-old male WBB6F1/J-Kit (W) /Kit (W-v) /J (W/W (v) ) mice with c-Kit point mutation, Kit (W-sh) /HNihrJaeBsmJ (W (sh) /W (sh) ) mice with an inversion mutation in the regulatory elements upstream of the c-Kit promoter region, and their wild-type controls (WT) were fed either a normal (0...
October 14, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28975737/bifunctional-platinum-ii-complexes-with-bisphosphonates-substituted-diamine-derivatives-synthesis-and-in-vitro-cytotoxicity
#14
Yanyan Sun, Jian Zhao, Zhongling Ji
A series of N,N'-dibisphosphonate-containing 1,3-propanediamine derivatives (L1-L6) and their corresponding dichloridoplatinum(II) complexes (1-6) have been synthesized and characterized by elemental analysis, (1) H NMR, (13) C NMR, (31) P NMR and HRMS spectra. The in vitro antitumor activities of compounds L1-L6 and 1-6 were tested by WST-8 assay with Cell Counting Kit-8, indicating that platinum-based complexes 1-6 showed higher cytotoxicity than corresponding ligands L1-L6 against A549 and MG-63, especially complex 2 which displayed comparable cytotoxicity to those of cisplatin and zoledronate after 48 h incubation...
October 4, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28947251/supplementation-of-freezing-media-with-stromal-cell-derived-factor-1%C3%AE-preserves-human-sperm-from-cryodamage
#15
Behnaz Hatef, Amirhossein Taromchi, Reza Nejatbakhsh, Ahmad Farrokhi, Saeed Shokri
The destructive effects of sperm cryopreservation result in reduced sperm motility and increased apoptosis. Oocytes, endometrium, and follicular fluid express stromal cell-derived factor-1 alpha (SDF-1α) or C-X-C motif chemokine ligand 12 (CXCL12) while its specific receptor chemokine, CXC motif receptor 4 (CXCR4) is expressed in the head of sperm. SDF-1α can increase sperm motility and preserve normal mitochondrial status. The present study intends to investigate whether the addition of SDF-1α to freezing extender can facilitate cryosurvival of spermatozoa and how SDF-1α protects spermatozoa against damages during cryopreservation...
September 22, 2017: Cryobiology
https://www.readbyqxmd.com/read/28922541/effects-of-collagen-peptides-intake-on-skin-ageing-and-platelet-release-in-chronologically-aged-mice-revealed-by-cytokine-array-analysis
#16
Hongdong Song, Ling Zhang, Yongkang Luo, Siqi Zhang, Bo Li
Action mechanisms underlying various biological activities of collagen peptides (CPs) remained to be elucidated. Cytokines may play an important role in mediating these health benefits of CPs. This study aimed to systemically examine the cytokines in skin and blood regulated by CPs intake. Thirteen-month-old female Kunming mice were administered with CPs for 2 months (0 or 400 mg/kg bodyweight/day). The cytokines in skin and plasma were analysed using a 53-cytokine array and corresponding ELISA kits. In skin, CPs intake significantly down-regulated placenta growth factor (PIGF-2), insulin-like growth factor (IGF)-binding protein (IGFBP) -2 and IGFBP-3, and up-regulated platelet factor 4 (PF4), serpin E1 and transforming growth factor (TGF)-β1 ...
September 18, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28881260/activation-status-of-receptor-tyrosine-kinases-as-an-early-predictive-marker-of-response-to-chemotherapy-in-osteosarcoma
#17
Parunya Chaiyawat, Jeerawan Klangjorhor, Jongkolnee Settakorn, Voraratt Champattanachai, Areerak Phanphaisarn, Pimpisa Teeyakasem, Jisnuson Svasti, Dumnoensun Pruksakorn
Receptor tyrosine kinases (RTKs) are membrane receptors that play a vital role in various biological processes, in particular, cell survival, cell proliferation, and cell differentiation. These cellular processes are composed of multitiered signaling cascades of kinases starting from ligand binding to extracellular domains of RTKs that activate the entire pathways through tyrosine phosphorylation of the receptors and downstream effectors. A previous study reported that, based on proteomics data, RTKs were a major candidate target for osteosarcoma...
October 2017: Translational Oncology
https://www.readbyqxmd.com/read/28861453/data-on-the-effect-of-oral-feeding-of-arachidonic-acid-or-docosahexanoic-acid-on-haematopoiesis-in-mice
#18
Kedar Limbkar, Ankita Dhenge, Dipesh D Jadhav, Hirekodathakallu V Thulasiram, Vaijayanti Kale, Lalita Limaye
Stem cells have peculiar property to self-renew and differentiate. It is important to control their fate in safe and effective ways for their therapeutic use. The mediators of essential polyunsaturated fatty acids (PUFAs) namely Arachidonic acid (AA) and Docosahexanoic acid (DHA) are known to play a role in haematopoiesis via various metabolic pathways [1]. However the direct effect of purified AA or DHA on haematopoiesis has not been well investigated yet. We have reported that oral administration of PUFAs enhanced haematopoiesis in mice [2]...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28751268/the-stem-cell-factor-scf-c-kit-system-in-carcinogenesis-of-reproductive-tissues-what-does-the-hormonal-regulation-tell-us
#19
REVIEW
Marília I Figueira, Henrique J Cardoso, Sara Correia, Cláudio J Maia, Sílvia Socorro
The tyrosine kinase receptor c-KIT and its ligand, the stem cell factor (SCF) are expressed in several tissues of male and female reproductive tract, playing an important role in the regulation of basic biological processes. The activation of c-KIT by SCF controls, cell survival and death, cell differentiation and migration. Also, the SCF/c-KIT system has been implicated in carcinogenesis of reproductive tissues due to its altered expression pattern or overactivation in consequence of gain-of-functions mutations...
October 1, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28734989/hydroxyvitamin-d-assays-an-historical-perspective-from-deqas
#20
G D Carter, J Berry, R Durazo-Arvizu, E Gunter, G Jones, J Jones, H L J Makin, P Pattni, C T Sempos, P Twomey, E L Williams, S A Wise
Recent years have seen a substantial increase in demand for 25-hydroxyvitamin D (25-OHD) assays. DEQAS (the Vitamin D External Quality Assessment Scheme) has been monitoring the performance of these assays since 1989. The first DEQAS distribution was in June 1989 and results were submitted by 13 laboratories in the UK, two of which used HPLC/UV; the rest used ligand binding assays with a tritium tracer. Inter-laboratory CVs (ALTM) ranged from 29.3% (42.7nmol/L) to 53.7% (20.0nmol/L). Currently the scheme has participants in 56 countries using 30 methods or variants of methods...
July 20, 2017: Journal of Steroid Biochemistry and Molecular Biology
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