scholarly journals Silencing of the WFS1 gene in HEK cells induces pathways related to neurodegeneration and mitochondrial damage

2013 ◽  
Vol 45 (5) ◽  
pp. 182-190 ◽  
Author(s):  
Sulev Kõks ◽  
Rupert W. Overall ◽  
Marilin Ivask ◽  
Ursel Soomets ◽  
Mithu Guha ◽  
...  
Keyword(s):  
Gene Expression ◽  
Western Blot ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Time Course ◽  
Expression Profiles ◽  
Mitochondrial Damage ◽  
Rt Pcr ◽  
Hek Cells ◽  
Wfs1 Gene

The gene WFS1 encodes a protein with unknown function although its functional deficiency causes different neuropsychiatric and neuroendocrine syndromes. In the present study, we aimed to find the functional networks influenced by the time-dependent silencing of WFS1 in HEK cells. We performed whole genome gene expression profiling (Human Gene 1.0 ST Arrays) in HEK cells 24, 48, 72, and 96 h after transfection with three different WFS1 siRNAs. To verify silencing we performed quantitative RT-PCR and Western blot analysis. Analysis was conducted in two ways. First we analyzed the overall effect of the siRNA treatment on the gene expression profile. As a next step we performed time-course analysis separately for different siRNAs and combined for all siRNAs. Quantitative RT-PCR and Western blot analysis confirmed clear silencing of the expression of WFS1 after 48 h. Significant (FDR value <10%) changes in the expression of 11 genes was identified with most of these genes being related to the mitochondrial dysfunction and apoptosis. Time-course analysis confirmed significant correlations between WFS1 silencing and changes in the expression profiles of several genes. The pathways that were influenced significantly by WFS1 silencing were related to mitochondrial damage and neurodegenerative diseases. Our findings suggest a role of WFS1 gene in cell survival and its involvement in degenerative diseases.

Secretoneurin is a potential paracrine factor from lactotrophs stimulating gonadotropin release in the goldfish pituitary

2010 ◽  
Vol 299 (5) ◽  
pp. R1290-R1297 ◽  
Author(s):  
E. Zhao ◽  
Caleb L. Grey ◽  
Dapeng Zhang ◽  
Jan A. Mennigen ◽  
Ajoy Basak ◽  
...  
Keyword(s):  
Gene Expression ◽  
Western Blot ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Time Course ◽  
Pcr Analysis ◽  
Pituitary Cells ◽  
Mrna Levels ◽  
Paracrine Factor ◽  
Lh Release

Secretoneurin (SN) is a functional neuropeptide derived from the evolutionarily conserved part of precursor protein secretogranin II (SgII). In the time course study, SN (10 nM) stimulates luteinizing hormone (LH) production and secretion after 6 h of static incubation of goldfish pituitary cells. Due to the existence of SN-immunoreactivity (SN-IR) in goldfish lactotrophs, endogenous SN might exert a paracrine effect on LH in the pituitary. In an in vitro immunoneutralization experiment, coincubation with anti-SN antiserum reduces the stimulatory effect of salmon gonadotropin-releasing hormone (sGnRH) on LH release by 64%. Using Western blot analysis, we demonstrate that sGnRH significantly increases the expression of the major SgII-derived peptide (∼57 kDa, with SN-IR) and prolactin (PRL) after 12 h in the static culture of goldfish pituitary cells. Furthermore, there exists a significant correlation between the levels of these two proteins ( R = 0.76, P = 0.004). Another ∼30 kDa SgII-derived peptide containing SN is only observed in sGnRH-treated pituitary cells. Consistent with the Western blot analysis results, real-time RT-PCR analysis shows that a 12-h treatment with sGnRH induced 1.6- and 1.7-fold increments in SgII and PRL mRNA levels, respectively. SgII gene expression was also associated with PRL gene expression ( R = 0.66; P = 0.02). PRL cells loaded with the calcium-sensitive dye, fura 2/AM, respond to sGnRH treatment with increases in intracellular Ca2+ concentration level, suggesting a potential mechanism of GnRH on PRL cells and thus SgII processing and SN secretion. Taken together, endogenous lactotroph-generated SN, under the control of hypothalamic GnRH, exerts a paracrine action on neighboring gonadotrophs to stimulate LH release.

Prima-1Met Combined with Bortezomib Has Synergistic Anti-Myeloma Activity By Modulation of Apoptosis and Cell Cycle Regulating Genes

Blood ◽  
2015 ◽  
Vol 126 (23) ◽  
pp. 4213-4213
Author(s):  
Priya Khoral ◽  
Robert J Guo ◽  
Jahangir Abdi ◽  
Hong Chang
Keyword(s):  
Gene Expression ◽  
Cell Cycle ◽  
Western Blot ◽  
Real Time ◽  
Cell Lines ◽  
Blot Analysis ◽  
Drug Combination ◽  
Western Blot Analysis ◽  
Rt Pcr ◽  
Novel Therapeutic

Abstract INTRODUCTION Multiple Myeloma (MM) is a plasma-cell malignancy characterized by dismal prognosis and a high level of relapse, thus novel therapeutic approaches are needed. PRIMA-1Met is a novel small molecule showing anti-tumour activity and currently in clinical phase I-II trials. We recently demonstrated that PRIMA-1Met has potent anti-MM activity in vitro and in vivo. Bortezomib (BTZ) is a proteasome inhibitor that has been successfully used for treating some cases of relapsed MM. The aim of the current study is to determine whether PRIMA-1Met could be used in combination with BTZ to enhance the cytotoxic effects in myeloma cells. METHODS Using three different MM cell lines (LP1, U266 and 8226), we established dose response curves for both PRIMA-1Met and BTZ, and tested drug cytotoxicity using MTT assays. We then tested drug cytotoxicity of a range of concentrations of the drugs in combination. The Chou Talay method was used to determine whether or not the drug combinations were synergistic. A gene expression array was used to investigate the mechanism of the drug combination's effects. Total RNA was isolated from MM cell pellets, then synthesized cDNAs were applied to real time RT-PCR gene expression arrays containing 84 genes of interest. The genes selected were involved in apoptotic as well as cell growth and proliferation pathways. After normalization to 4 different housekeeping genes, fold changes in gene expression were analyzed in both drug treated and control samples using the 2-ΔΔCt algorithm. Western blot analysis was used to further investigate proteins of interest. RESULTS Cell viability of 8226, LP1 and U266 cells treated with individual concentrations of PRIMA-1Met (10uM) and BTZ (10nM) was on average 65%, 45% and 72.5%, respectively. However, combination of above doses reduced viability to 20% in 8226 and LP1, and to 40% in U266. The Chou Talay method identified this drug combination as synergistic in 2 out of the three tested cell lines, with Combination Index (CI) values of 0.72 in 8226 and 0.582 in U266. The gene expression analysis in real time RT-PCR indicated that the drug combination resulted in downregulation of genes involved in cell cycle and proliferation (CCND1, CDK4, CDK6, CDK2, IGFIR), genes from the Bcl-2 family of apoptosis regulation (Bcl-2, Bcl-XL, Mcl-1), as well as MDM2 from the p53 signalling pathway, and MYC, which is involved in both apoptosis and cell cycle progression. Western blot analysis revealed up-regulation of cleaved caspase-3 and -9, implying involvement of the intrinsic apoptotic pathway in the drug combination's activity. CONCLUSION Our results reveal that PRIMA-1Met synergistically enhances the anti-MM effect of BTZ, leading to a significantly higher level of MM cell death. Real time RT-PCR gene array analysis offers some insight into the mechanism of this combination's effect, implicating apoptotic, cell cycle and growth regulating genes. Our study provides framework for further evaluation of this drug combination as a novel therapeutic strategy in MM. Disclosures No relevant conflicts of interest to declare.

scholarly journals NHE1, NHE2, and NHE3 contribute to regulation of intracellular pH in murine duodenal epithelial cells

2000 ◽  
Vol 278 (2) ◽  
pp. G197-G206 ◽  
Author(s):  
J. Praetorius ◽  
D. Andreasen ◽  
B. L. Jensen ◽  
M. A. Ainsworth ◽  
U. G. Friis ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Western Blot ◽  
Intracellular Ph ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Mrna Level ◽  
Rt Pcr ◽  
Acid Extrusion ◽  
Molecular Expression ◽  
Nhe Isoforms

Na+/H+-exchangers (NHE) mediate acid extrusion from duodenal epithelial cells, but the isoforms involved have not previously been determined. Thus we investigated 1) the contribution of Na+-dependent processes to acid extrusion, 2) sensitivity to Na+/H+ exchange inhibitors, and 3) molecular expression of NHE isoforms. By fluorescence spectroscopy the recovery of intracellular pH (pHi) was measured on suspensions of isolated acidified murine duodenal epithelial cells loaded with 2′,7′-bis(2-carboxyethyl)-5(6)-carboxyfluorescein. Expression of NHE isoforms was studied by RT-PCR and Western blot analysis. Reduction of extracellular Na+ concentration ([Na+]o) during pHirecovery decreased H+ efflux to minimally 12.5% of control with a relatively high apparent Michaelis constant for extracellular Na+. The Na+/H+exchange inhibitors ethylisopropylamiloride and amiloride inhibited H+ efflux maximally by 57 and 80%, respectively. NHE1, NHE2, and NHE3 were expressed at the mRNA level (RT-PCR) as well as at the protein level (Western blot analysis). On the basis of the effects of low [Na+]o and inhibitors we propose that acid extrusion in duodenal epithelial cells involves Na+/H+ exchange by isoforms NHE1, NHE2, and NHE3.

scholarly journals Integrin β3 Mediates the Endothelial-to-Mesenchymal Transition via the Notch Pathway

2018 ◽  
Vol 49 (3) ◽  
pp. 985-997 ◽  
Author(s):  
Weisen Wang ◽  
Zhi Wang ◽  
Dingyuan Tian ◽  
Xi Zeng ◽  
Yangdong Liu ◽  
...  
Keyword(s):  
Western Blot ◽  
Notch Signaling ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Notch Signaling Pathway ◽  
Rt Pcr ◽  
Mesenchymal Transition ◽  
Integrin Β3 ◽  
Endothelial To Mesenchymal Transition ◽  
Tgf Β1

Background/Aims: Neointimal hyperplasia is responsible for stenosis, which requires corrective vascular surgery, and is also a major morphological feature of many cardiovascular diseases. This hyperplasia involves the endothelial-to-mesenchymal transition (EndMT). We investigated whether integrin β3 can modulate the EndMT, as well as its underlying mechanism. Methods: Integrin β3 was overexpressed or knocked down in human umbilical vein endothelial cells (HUVECs). The expression of endothelial markers and mesenchymal markers was determined by real-time reverse transcription PCR (RT-PCR), immunofluorescence staining, and western blot analysis. Notch signaling pathway components were detected by real-time RT-PCR and western blot analysis. Cell mobility was evaluated by wound-healing, Transwell, and spreading assays. Fibroblast-specific protein 1 (FSP-1) promoter activity was determined by luciferase assay. Results: Transforming growth factor (TGF)-β1 treatment or integrin β3 overexpression significantly promoted the EndMT by downregulating VE-cadherin and CD31 and upregulating smooth muscle actin α and FSP-1 in HUVECs, and by enhancing cell migration. Knockdown of integrin β3 reversed these effects. Notch signaling was activated after TGF-β1 treatment of HUVECs. Knockdown of integrin β3 suppressed TGF-β1-induced Notch activation and expression of the Notch downstream target FSP-1. Conclusion: Integrin β3 may promote the EndMT in HUVECs through activation of the Notch signaling pathway.

scholarly journals Investigation into imbalance of Th1/Th2 cells in cirrhotic, hypersplenic rats

2019 ◽  
Vol 48 (3) ◽  
pp. 030006051988944 ◽  
Author(s):  
Yunfu Lv ◽  
Yejuan Li ◽  
Ning Liu ◽  
Yonghong Dong ◽  
Jie Deng
Keyword(s):  
Western Blot ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Chemokine Receptors ◽  
Immunohistochemical Staining ◽  
Th2 Cells ◽  
Intragastric Administration ◽  
Mrna Levels ◽  
Rt Pcr ◽  
Chemokine Receptor Ccr3

Objectives To evaluate the Th1/Th2 cell profile in spleens of cirrhotic and hypersplenic rats by investigating the expression of Th1-associated chemokine receptors CXCR3, CCR5 and Th2-associated chemokine receptor CCR3. Methods Experimental liver cirrhosis and hypersplenism were induced in rats by the intragastric administration of carbon tetrachloride (CCl4; 40% solution [0.3 ml/100g, twice/week for 8 weeks]) and confirmed by pathology and hemogram. Presence of the three chemokine receptors was investigated by real-time polymerase chain reaction (RT-PCR), immunohistochemical staining, and western blot analysis. Results By comparison with control animals (n=10), RT-PCR demonstrated that CXCR3 and CCR5-mRNA levels were significantly elevated in the hypersplenic rats (n=26) and CCR3-mRNA levels were lower. Immunohistochemical staining showed that by comparison with controls, the mean density of the Th1-associated CXCR3 and CCR5 receptors was significantly increased but there was no difference between groups in Th2-associated CCR3 receptors. Western blot analysis showed that by comparison with controls, hypersplenic rats had higher levels of CXCR3 and CCR5 protein but lower levels of CCR3 protein. Conclusions The abnormal expression of Th1-associated chemokine receptors in spleens of rats with cirrhosis and hypersplenism induced by CCL4 suggests that a functional imbalance between Th1/Th2 cells may play a role in the pathogenesis of hypersplenism.

scholarly journals Proteomic profiles of unilateral cryptorchidism in pigs at different ages using MALDI-TOF mass spectrometry and in-gel digestion coupled with mass spectrometry (GeLC-MS/MS) approaches

2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Nathamon Yimpring ◽  
Sittiruk Roytrakul ◽  
Janthima Jaresitthikunchai ◽  
Narumon Phaonakrop ◽  
Sucheewin Krobthong ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Protein Expression ◽  
Western Blot ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Expression Profiles ◽  
Tumor Necrosis Factor Receptor ◽  
Principal Component ◽  
Peptide Mass ◽  
Different Ages

Abstract Background Cryptorchidism is a condition that occurs when one or both testes fail to descend into the scrotum. It is a common congenital disorder, causing economic loss in pig production. However, there have been only limited studies of differential protein expression profiles in undescended testes (UDTs) in the abdomen and descended testes (DTs) in cryptorchid pigs, especially at the peptidome and proteome levels. The present study aimed to analyze the peptidome of UDTs and DTs in unilateral cryptorchid pigs aged 1–2, 6, 15 and 20 weeks and in normal testes of healthy pigs aged 1–2 and 12 weeks, using peptide mass fingerprinting and three-dimensional principal component analysis (3D-PCA) with matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and to identify potential protein candidates, using in-gel digestion coupled with mass spectrometry (GeLC-MS/MS). Western blot analysis was used to verify protein expression. Protein sequence was affirmed by liquid chromatography–tandem mass spectrometry. Results A PCA plot showed a discrete cluster for each sample group. Peptide mass fingerprints (PMFs) demonstrated unique peptide fragments in UDTs at different ages. A number of markedly expressed proteins from GeLC-MS/MS were identified, including the multifunctional tumor necrosis factor receptor superfamily member 18 (TNFRSF18), in DTs at 1–2 and 6 weeks and in UDTs at 15 and 20 weeks of age. Using western blot analysis, high expression of TNFRSF18 was observed in the UDTs at 15 weeks. Using the STITCH database, this protein was found to be related to apoptosis, corresponding to the previous report in the UDTs at the same age. Conclusions The present study revealed the specific PMFs and clusters for porcine cryptorchidism, and a novel protein, TNFRSF18, associated with the disease mechanism. These results could provide further insights into the pathogenesis of the disease.

scholarly journals Melatonin Reduces Inflammatory Injury through Inhibiting NF-κB Activation in Rats with Colitis

2005 ◽  
Vol 2005 (4) ◽  
pp. 185-193 ◽  
Author(s):  
Jun-Hua Li ◽  
Jie-Ping Yu ◽  
Hong-Gang Yu ◽  
Xi-Ming Xu ◽  
Liang-Liang Yu ◽  
...  
Keyword(s):  
Western Blot ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Rt Pcr ◽  
Colon Tissue ◽  
Inflammatory Injury ◽  
Proinflammatory Mediators ◽  
Proinflammatory Molecule ◽  
Colitis Model

Proinflammatory mediators are important in the pathogenesis of IBD, which are regulated by activation of NF-κB. The aim of this study was to investigate whether melatonin reduces inflammatory injury and inhibits proinflammatory molecule and NF-κB in rats with colitis. Rat colitis model was established by TNBS enema. NF-κB p65, TNF-α, ICAM-1, and IκBα in colon tissue were examined by immunohistochemistry, EMSA, RT-PCR, and Western blot analysis. Expression of proinflammatory molecule and activation of NF-κB were upregulated and IκB level decreased in rats with colitis. Melatonin reduces colonic inflammatory injury through downregulating proinflammatory molecule mediated by NF-κB inhibition and blockade of IκBα degradation.

The Spermatozoa Protein, SLLP1, Is a Novel Cancer-Testis Antigen in Hematologic Malignancies.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 4281-4281
Author(s):  
Zhiqing Wang ◽  
Yana Zhang ◽  
Arabinda Mandal ◽  
Jian Zhang ◽  
Francis J. Giles ◽  
...  
Keyword(s):  
Immune Responses ◽  
Western Blot ◽  
Tumor Cells ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Hematologic Malignancies ◽  
Myeloma Cell ◽  
Rt Pcr ◽  
Healthy Donors ◽  
Cancer Testis

Abstract SLLP1 is a unique non-bacteriolytic c-lysozyme-like protein isolated from human spermatozoa. Antisera to SLLP1 blocks binding in the hamster egg penetration assay, suggesting that SLLP1 may be involved in sperm/egg adhesion. A recent study by dot blot analysis on RNA showed that SLLP1 was expressed only in the testis and in Burkitt lymphoma Raji cell line, suggesting that further studies are warranted to determine and characterize SLLP1 expression in tumor cells, in particular, fresh tumor specimens. Using a pair of sequence-specific primers in RT-PCR, we found that SLLP1 transcripts could be detected in 5/8 myeloma cell lines, suggesting that SLLP1 may be expressed in tumor cells from some hematologic malignancies. When we applied the investigations to 52 primary hematologic malignant specimens, SLLP1 transcripts were detected in 6/17 myeloma, 4/14 CML, 3/11 CLL, 2/9 AML and 0/1 hairy cell leukemia. In contrast, SLLP1 transcripts were not detected in the peripheral blood (n=12) or bone marrow (n=3) from any healthy donors. The specificity of the PCR products was confirmed by either sequence analysis or restriction digest with Pvu II. SLLP1 transcripts were translated into its corresponding protein in these tumor cells. Using tumor cell lysate in Western blot analysis, we detected SLLP1 protein in the myeloma cell lines and also in fresh malignant specimens, although positivities were only observed in specimens with high RT-PCR signals. All PCR-negative specimens were also negative in Western blot analysis. The specificity of the Western blot signals were confirmed in all cases by blocking assays with a high concentration of recombinant SLLP1 protein. We next investigated the expression of SLLP1 in a large panel of normal tissues using RT-PCR and real time quantitative PCR. Both approaches showed that SLLP1 is a novel Cancer-Testis antigen in hematologic malignancies. SLLP1 was detected, at a level of 8206 copies/0.25 mcg total RNA, only in normal testis. We also found that the SLLP1 mRNA copy numbers in fresh hematologic tumor specimens were up to 2316 copies/0.25 mcg total RNA, i.e. more than 25% of the level found in normal testis. We cloned and generated SLLP1 recombinant protein from E coli and used the purified recombinant SLLP1 in an ELISA system to detect anti-SLLP1 antibodies. Using sera from 24 healthy donors and the mean + 2SD as the cut-off signal intensities, we found that high titer IgG antibodies directed at SLLP1 could be detected in the sera from 2/9 AML, 5/23 CLL, 6/27 CML and 14/51 myeloma patients. The specificity of the antibodies was confirmed in Western blot analysis. Probably due to the decreased sensitivity of the detection system in Western blot analysis, only 1/2 AML, 3/5 CLL, 4/6 CML and 7/14 myeloma SLLP1 antibody+ sera produced a signal in the Western blot analysis. Interesting, IgG2 was by far the commonest SLLP1 antibodies in these patients. There was a good correlation between SLLP1 gene expression and immune responses. In summary, SLLP1 is a novel CT antigen in hematologic malignancies and is capable of eliciting B-cell immune responses in vivo in cancer-bearing patients. Our results support SLLP1 as a protein target appropriate for further in vitro study to define its suitability for immunotherapy.

Arsenic Trioxide Affects Early Stage Angiogenesis through Inhibition of CD14 Monocyte Transdifferentiation into Endothelial Cells Induced by Pleiotrophin and mCSF.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 1267-1267
Author(s):  
Haiming Chen ◽  
Mingjie Li ◽  
Richard A. Campbell ◽  
Melinda S. Gordon ◽  
Dror Shalitin ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Western Blot ◽  
Arsenic Trioxide ◽  
Blot Analysis ◽  
Western Blot Analysis ◽  
Early Stage ◽  
Vascular Endothelial ◽  
Cam Assay ◽  
Rt Pcr ◽  
Vessel Formation

Abstract We have discovered a novel mechanism leading to blood vessel formation involving transdifferentiation of monocytes into endothelial cells by tumor cell production of pleiotrophin (PTN), a protein highly produced by myeloma (H. Chen et al, Blood, 2005; Yeh et al BJH, 2006). Arsenic trioxide (ATO) induces apoptosis of cancer cells directly through a number of mechanisms, and this drug has also been shown to inhibit angiogenesis. However, it remains unknown whether ATO affects the earliest stages of angiogenesis and vasculogenesis important in tumor development. We purified human monocytes (CD14+) and cultured these cells on collagen I-coated dishes. mCSF was added to the cells after 1 hour of culture. PTN was added twice to the culture, once after 24 hours and again after 5 days with or without ATO or bortezomib. FLK-1 expression (VEGFR-2) showed that the cells incubated on collagen I without drugs formed tube-like structures in the presence of PTN and mCSF. However, the tube-like structures disappeared after adding either the IC50 (5x10−6M) dose or low (5x10−7M) dose of ATO. FLK-1 staining remains in the tube-like structures with low doses (3x10−12M) of bortezomib. In order to examine whether ATO or bortezomib affects endothelial gene expression when monocytes are induced to transdifferentiate in the presence of these cytokines, we also examined expression using RT-PCR on endothelial cell genes (vascular endothelial growth factor receptor-2 (Flk-1), Tie-2 and von Willebrand factor (vWF)) and Western blot analysis for protein expression. The results of both RT-PCR and Western blot analysis showed that the expression of endothelial markers was blocked at both the higher (5x10−6M) and lower (5x10−7M) doses of ATO. In contrast, the expression of endothelial markers was not reduced by adding low dose bortezomib (3x10−12M). We further examined the effects of ATO and bortezomib on early stage angiogenesis in vivo using the chorioallantoic membrane (CAM) assay. Fertilized chick eggs were incubated horizontally at 38°C in a humidified incubator, windowed by day 3 of incubation and processed by day 8. The tested micro-sponge with ATO (5x10−6M) or bortezomib (3x10−11M) or control reagents was implanted on the CAM. The eggs were sealed with adhesive tape and returned to the incubator for 48 hours. The assay scored positive when two independent observers reported a significant reduction of vessels in the treated area. The results of the CAM assay showed that compared to saline, ATO significantly reduced new macroscopic and microscopic vessel formation. In contrast, bortezomib did not affect angiogenesis in the CAM assay. These experiments define a previously unrecognized novel mechanism by which ATO may have anti-angiogenetic effects in cancer patients-preventing the transdifferentiation of monocytes into endothelial cells by PTN. They also suggest ATO as a potential new specific agent to inhibit angiogenesis resulting from transdifferentiation of monocytes into vascular endothelial cells driven by pleiotrophin and mCSF. These results suggest a novel way by which anti-cancer agents may impact angiogenesis.

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