Background and Aims: Vascular endothelial growth factor (VEGF) is a potential prognostic biomarker for patients with resected gastric cancer. However, its role remains controversial. The objective of this study was to conduct a systematic review and meta-analysis of published literature. Methods: Relevant literature was identified using Medline and survival data from published studies were collected following a methodological assessment. Quality assessment of eligible studies and meta-analysis of hazard ratio (HR) were performed to review the correlation of VEGF overexpression with survival and recurrence in patients with gastric cancer. Results: Our meta-analysis included 44 published studies with 4,794 resected patients. VEGF subtype for the prediction of overall survival (OS) included tissue VEGF (HR=2.13, 95% CI 1.71-2.65), circulating VEGF (HR=4.22, 95% CI 2.47-7.18), tissue VEGF-C (HR=2.21, 95% CI 1.58-3.09), tissue VEGF-D (HR=1.73, 95% CI 1.25-2.40). Subgroup analysis showed that HRs of tissue VEGF for OS were, 1.78 (95% CI 0.90-3.51) and 2.31 (95% CI 1.82-2.93) in non-Asians and Asians, respectively. The meta-analysis was also conducted for disease free survival (DFS) and disease specific survival (DSS). Conclusion: Positive expression of tissue VEGF, circulating VEGF, VEGF-C and VEGF-D were all associated with poor prognosis in resected gastric cancer. However, VEGF demonstrated no significant prognostic value for non-Asian populations. Circulating VEGF may be better than tissue VEGF in predicting prognosis.
Kwak, Do Hoon;Bae, Tae Hui;Kim, Woo Seob;Kim, Han Koo
Archives of Plastic Surgery
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v.43
no.6
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pp.491-497
/
2016
Background Hypertrophic scarring is a pathological condition that occurs after trauma or surgery. Angiogenesis occurs more often with hypertrophic scarring than with normotrophic scarring. The regulation of angiogenesis is one of the key factors in hypertrophic scar management. Vascular endothelial growth factor (VEGF) is an essential factor in the angiogenetic response. This study investigated whether decreasing the level of VEGF is effective for treating hypertrophic scarring. Methods Ten 8-week-old female New Zealand white rabbits were included. Four defects were created on each ear by using a 6-mm punch. Bevacizumab (Avastin, Roche Pharma, Basel, Switzerland) was administered in one ear and normal saline was administered in the other ear. Treatment was administered starting on day 2, every 2 days, until day 14. The levels of VEGF were measured using enzyme-linked immunosorbent assay on day 10 and histologic results were analyzed on day 40. Results Bevacizumab induced-defects showed less hypertrophic scarring when compared with the control group as measured by the scar elevation index (SEI) and loose collagen arrangement. The SEI in the experimental group was $1.89{\pm}0.13$, compared to $1.99{\pm}0.13$ in the control group (n=30, P=0.005). Additionally, the VEGF level was lower ($38.72{\pm}11.03pg$ vs. $82.50{\pm}21.64pg$, n=10, P=0.001) and fewer vessels existed ($8.58{\pm}0.76$ vs. $7.2{\pm}1.20$, n=10, P=0.007). Conclusions Preventing excessive angiogenesis is effective for preventing scar formation, especially with hypertrophic scarring. Although it is not an approach that is sufficient alone for the management of scarring, it may be one of several important strategies for scar treatment.
Min Woong Kim;Eung Ji Lee;Ha-Na Gil;Yong Ji Chung;Eun Mi Kim
Journal of the Society of Cosmetic Scientists of Korea
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v.49
no.1
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pp.75-85
/
2023
This study was conducted to assess the effect of heptapeptide, composed of seven amino acids, on the activation of human hair cells isolated from human hair follicles. We have confirmed that the heptapeptide could bind to Lgr5 from the results of surface plasmon resonance (SPR) analysis. Heptapeptide enhanced the proliferation of human hair follicle dermal papilla cells (HHFDPCs) in a dose dependent manner. It induced the protein level of nuclear β-catenin, and the expressions of β-catenin downstream target genes, including LEF1, Cyc-D1 and c-Myc, in HHFDPCs. Heptapeptide significantly induced the phosphorylation of Akt and ERK, and the mRNA expressions of growth factors, including hepatocyte growth factor (HGF), keratinocyte growth factor (KGF) and vascular endothelial growth factor (VEGF), in HHFDPCs. In addition, heptapeptide significantly increased mRNA expression levels of differentiation-related transcription factors of human hair germinal matrix cells (HHGMCs) and differentiation markers of human hair outer root sheath cells (HHORSCs). Additionally, we investigated the effect of heptapeptide on human hair follicle stem cells (HHFSCs) differentiation and found that the heptapeptide reduced the mRNA and protein levels of stem cell markers, while it increased those levels of differentiation markers. These results have indicated that the heptapeptide promotes proliferation or differentiation of various types of hair follicle constituent cells through the induction of Wnt/β-catenin signaling. From the results, we have suggested that the heptapeptide in this study could be applied as a new functional material for the improvement of hair growth and alopecia.
Lee, Ho Seok;Yun, Sin Weon;Jung, Young Soo;Chae, Soo Ahn;Lim, In Seok;Lee, Dong Keun;Choi, Eung Sang;Yoo, Byung Hoon;Lee, Mi Kyung
Clinical and Experimental Pediatrics
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v.50
no.10
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pp.995-1004
/
2007
Purpose : Kawasaki disease is a systemic vasculitis, leading cause of pediatric acquired heart disease. Vascular endothelial growth factor (VEGF) has functions as vascular permeability factor, plays an important role in coronary artery lesion (CAL). We studied the clinical significance of serum VEGF in Kawasaki disease. Methods : Kawasaki group was 49 patients, and control group was 15 patients. Diagnosis followed AHA (American Heart Association) diagnostic criteria, with blood sampling in acute, subacute, and convalescent phase. Echocardiographic abnormalities were defined and the definition of intravenous gamma globulin (IVGG)-responsive and IVGG-resistant was determined. Results : Serum VEGF of Kawasaki group was significantly higher than of control group. Comparison of serum VEGF between CAL and non-CAL group, between carditis group and non-carditis group showed no significant differences. Subacute serum VEGF was statistically higher in IVGG-resistant group than in IVGG-responsive group, and serum VEGF of IVGG-resistant group in subacute phase was statistically higher than in the other phases. Serum VEGF of convalescent CAL and non-CAL group in acute and subacute phase had meaningful differences. Total fever duration and subacute serum VEGF had positive correlation. Acute serum VEGF had positive correlation with ESR and CRP, all phases serum VEGF had also positive correlation with WBC. Acute and subacute serum VEGF had negative correlations with hemoglobin and albumin. Conclusion : Serum VEGF can help to determine the severity of Kawasaki disease, especially subacute serum VEGF seems to be used as a prognostic factor of coronary complication. Afterward, further studies needed with more strict diagnostic criteria and more study groups.
Aims: Angiogenesis is important in malignant pleural effusion (MPE) formation and it is regulated by a number of pro- and anti-angiogenic cytokines. The purpose of this study was to evaluate the prognostic value of angiogenic factor vascular endothelial growth factor (VEGF) and angiogenesis inhibitor endostatin in lung cancer patients with MPE, and investigate the relationship between these two kinds of agent. Methods: Using enzyme-linked immunoadsorbent assay, the concentrations of VEGF and endostatin were measured in pleural effusions (PE) and serum from a total of 70 lung cancer patients with MPE and 20 patients with tuberculosis. Results: Compared to patients with tuberculosis, the levels of VEGF and endostatin in both PE and serum were significantly higher in patients with lung cancer. There were statistically significant correlations between VEGF levels in PE and serum (r=0.696, p<0.001), endostatin levels in PE and serum (r=0.310, p=0.022), and VEGF and endostatin levels in PE (r=0.287, p=0.019). Cox multivariate analysis revealed that elevated pleural VEGF and endostatin levels and serum endostatin level were independent predictors of shorter overall survival. Conclusion: Both pro- and anti-angiogenic factors are likely contributors to PE formation. Our results suggest that the levels of VEGF and endostatin in PE, together with endostatin in serum, may be potential prognostic parameters for lung cancer patients with MPE.
Inflammatory cells express the inflammatory cytokines and growth factors induced by lipopolysaccharide (LPS). Odontoblasts are located at the pulp-dentin interface and extend their cell processes far into the dentin where they are the first cells to encounter microorganisms or their products. Therefore, this study examined the expression of some growth factors related to the signal pathway, such as growth factor receptor binding protein 2 (Grb2)-Ras in odontoblast-like dental pulp cells, after a treatment with LPS. After 60 minutes, the mRNA and protein expression levels of Grb2 and Ras were higher in the LPS-treated cells than in the control cells. The level of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) mRNA expression was increased significantly to a level similar to that of Grb2 and Ras at 60 minutes. The platelet-derived growth factor-AA (PDGF-AA) mRNA level was expressed strongly in the odontoblast like dental pulp cells without an association with LPS stimulation. Scanning electron microscopy revealed many extensions of the cytoplasmic processes and the number of processes increased gradually at 30, 60 and 90 minutes after LPS stimulation. From these results VEGF and bFGF expression might be induced through the Grb2-Ras signal transduction pathway in LPS treated odontoblasts.
The majority of early embryonic mortality in pregnancy occurs during the peri-implantation stage, suggesting that this period is important for conceptus viability and the establishment of pregnancy. Successful establishment of pregnancy in all mammalian species depends on the orchestrated molecular events that transpire at the conceptus-uterine interface during the peri-implantation period. This maternal-conceptus interaction is especially crucial in pigs because in them non-invasive epitheliochorial placentation occurs, in which the pre-implantation phase is prolonged. During the pre-implantation period, conceptus survival and the establishment of pregnancy are known to depend on the developing conceptus receiving an adequate supply of histotroph, which contains a wide range of nutrients and growth factors. Evidence links growth factors including epidermal growth factor (EGF), insulin-like growth factor-I (IGF-I), vascular endothelial growth factor (VEGF), and colony-stimulating factor 2 (CSF2) to embryogenesis or implantation in various mammalian species; however, in the case of pig, little is known about such functions of these growth factors, especially their regulatory mechanisms at the maternal-conceptus interface. Our research group has presented evidence for promising growth factors affecting cellular activities of primary porcine trophectoderm (pTr) cells, and we have identified potential intracellular signaling pathways responsible for the activities induced by these factors. Therefore, this review focuses on promising growth factors at the maternal-conceptus interface regulating the development of the porcine conceptus and playing pivotal roles in implantation events during early pregnancy in pigs.
Background and Purpose: Some subtypes of malignant salivary gland tumors such as adenoid cystic carcinoma (ACC) frequently result in distant metastasis of vascular origin, which are main causes of treatment failure. The reasons for the affinity for vascular metastatic potential are unclear. Therefore, molecular characteristics that influence the dissemination of metastatic tumor cells are important for the design of more effective treatment of salivary ACC. Tumor angiogenesis has been known to be essential for the distant metastasis of malignant cells. So, we determined expressions of vascular metastasis related factors in orthotopic (parotid) murine models of parotid ACC and compared with those in ectopic (subcutis) tumors of athymic mice. Experimental Design: Using specimens from murine parotid (orthotopic, experimental group) and subcutaneous (ectopic, control group) tumors, which have developed via transplantation of tumor cells, originated from human parotid ACC, we performed immunohistochemical assays with anti-vascular endothelial growth factor (VEGF), basic fibroblast growth factor (bFGF, FGF2), matrix metalloproteinase (MMP)-9, and interleukin (IL)-8 antibodies. We also performed immunohistochemical assays with VEGF receptor (VEGFR)-1, VEGFR-2, VEGFR-3, and phosphorylated VEGFR-2. Results: Transplantation of human ACC tumor cell $(5{\times}10^5)$ into the parotid and subcutis successfully resulted in orthotopic (parotid) and ectopic (subcutaneous) tumors in athymic mice. Immunohistochemical staining demonstrated higher expression of major angiogenic factors (VEGF, bFGF, MMP-9) in the orthotopic tumors than in ectopic tumors (P<0.05). But the expression level of angiogenic receptors were same in orthotopic and ectopic tumors of parotid ACC. Conclusion: VEGF, bFGF, and MMP-9 could be a good candidates for antiangiogenic therapy for the contol of vascular metastatic lesions of salivary ACC.
Objectives : Angiogenesis consists of the proliferation, migration, and differentiation of endothelial cells, and angiogenic factors and matrix protein interactions modulate this process. The aim of this study was to determine whether herbs medicine(KHBJs) could induce angiogenic activity in human umbilical vein endothelial cells(HUVECs). Methods : The angiogenic activity of KHBJs were evaluated by proliferation using BrdU assay, chemotactic migration assay, tube formation assay, and measurement of basic fibroblast growth factor (bFGF) and vascular endothelial growth factor(VEGF) in HUVECs. Also, In order to identify enhance angiogenic activity by activity guided fractionation, the angiogenic activity of fractions of KHBJs such as KHBJB or KHBJR were evaluated in vitro and in vivo Matrigel plug angiogenesis asaay. Results : About 9 KHBJs significantly increased HUVECs proliferation in a dose-dependent manner. In addition, 9 herbs medicine(KHBJs) increased migration and tube-like formation in HUVECs. Interestingly the expression of bFGF and VEGF, an angiogenesis-inducing growth factor, were dose-dependently increased by KHBJs. However, angiogenic activity of fractionated KHBJs(KHBJB or KHBJR) not enhanced more than KHBJs in HUVECs and Matrigel plug in vivo angiogenesis assay. Conclusions : 9 KHBJs significantly induces angiogenesis in in vitro and in vivo. These results suggest that 9 KHBJs potent angiogenic agents and promising drug for the induction of neovascularization.
Seo, Young;Yu, Byung Keun;Oh, Yeon Joung;Lee, Yoon;Yoo, Young;Choung, Ji Tae;Koh, Young Yull
Clinical and Experimental Pediatrics
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v.51
no.5
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pp.487-491
/
2008
Purpose : Although Mycoplasma pneumoniae (M. pneumoniae) infection can cause wheezing in non-asthmatic children, the mechanisms of this symptom remain unclear. Vascular endothelial growth factor (VEGF) is a major mediator of angiogenesis and vascular permeability, and is also known to be elevated in cases of chronic pulmonary disease such as asthma. We hypothesized that VEGF may increase in children with acute M. pneumoniae pneumonia and wheezing. Methods : Nine patients with clinical and laboratory evidence of acute M. pneumoniae pneumonia were enlisted from children admitted to Korea University Hospital. They had had more than one episode of wheezing during the illness, which was confirmed by a physician; they comprised the wheezer group. The individuals with M. pneumoniae pneumonia without wheezing were 63 in number, and they comprised the non-wheezer group. Patients with a history of asthma or who had received asthma medications were excluded. Serum concentrations of VEGF, total IgE, eosinophil cationic protein (ECP), and peripheral blood eosinophil counts were measured. Results : The serum VEGF concentrations were higher in the wheezer group ($mean{\pm}SD$; $650.2{\pm}417.9pg/mL$) than in the non-wheezer group ($376.5{\pm}356.2pg/mL$, P=0.049). M. pneumoniae antibody (1:1,380 vs. 1:596, P=0.048) and serum total IgE (591.8 IU/mL vs. 162.2 IU/mL, P=0.032) were higher in the wheezer group than in the non-wheezer group. There were no differences between the two groups in terms of serum ECP concentration or blood eosinophil count. Conclusion : In the presence of wheezing, serum VEGF concentrations were higher in the children with M. pneumoniae pneumonia. This finding suggests that VEGF may associate with wheeze-related symptoms in children with acute M. pneumoniae pneumonia.
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