Kim, Sang Ha;Lee, Won Yeon;Park, Joo Young;Park, Hyun Sook;Han, Hye-Kyoung;Ju, Hun Su;Hong, Tae Won;Lee, Nak Won;Shin, Kye Chul;Yong, Suk Joong
Tuberculosis and Respiratory Diseases
/
v.55
no.5
/
pp.467-477
/
2003
Background : Pleural effusions are generally divided into transudates and exudates. If it is exudative, more diagnostic tests are required in order to determine the cause of the local disease. A malignancy is a common and important cause of exudative pleural effusions. Because the pleural fluid cytology and pleural biopsy specimens do not provide a diagnosis in a high percentage of malignant effusions, several tumor markers have been examined. In order to overcome this limitation, this study hypothesized that C-reactive protein(CRP) and vascular endothelial growth factor(VEGF) measurements would be useful for differentiating trasudates from exudates and determining the differences between a benign and malignant effusion. Methods : Eighty consecutive patients with a pleural effusion (tuberculous 20, parapneumonic 20, malignant 20, transudative 20) were examined prospectively: 60 of them were classified according to Light's criteria as having an exudative fluid and 20 had a transudative fluid. The standard parameters of a pleural effusion were examined and the serum and pleural effusion VEGF levels were measured using enzyme linked immunosorbent assay(ELISA). CRP in the serum and pleural fluid was determined by a turbidimetric immunoassay. Results : The pleural CRP levels in the exudates were significantly higher than those in the transudates, $4.19{\pm}4.22mg/d{\ell}$ and $1.29{\pm}1.45mg/d{\ell}$, respectively. The VEGF levels in the pleural effusions were significantly elevated in the exudates compared to the transudate, $1,011{\pm}1,055pg/m{\ell}$ and $389{\pm}325pg/m{\ell}$, respectively. The VEGF ratio in the exudative effusion is significantly higher than a transudative effusions, $3.9{\pm}4.7$ and $1.6{\pm}0.9$, respectively. The pleural CRP levels in the patients with a benign effusion($4.15{\pm}4.20mg/d{\ell}$) were significantly higher than those in the malignant effusion($1.43{\pm}1.91mg/d{\ell}$). The VEGF ratio is significantly higher in malignant effusions($4.9{\pm}5.5$) than in benign effusions($2.8{\pm}3.6$). Conclusion : In conclusion, the CRP and VEGF levels in the serum and pleural effusion can distinguish between transudates and exudates. Moreover it can differentiate between benign and malignant pleural effusions.
Background: Gintonin is a ginseng-derived exogenous G-protein-coupled lysophosphatidic acid (LPA) receptor ligand, which exhibits in vitro and in vivo functions against Alzheimer disease (AD) through lysophosphatidic acid 1/3 receptors. A recent study demonstrated that systemic treatment with gintonin enhances paracellular permeability of the blood-brain barrier (BBB) through the LPA1/3 receptor. However, little is known about whether gintonin can enhance brain delivery of donepezil (DPZ) (Aricept), which is a representative cognition-improving drug used in AD clinics. In the present study, we examined whether systemic administration of gintonin can stimulate brain delivery of DPZ. Methods: We administered gintonin and DPZ alone or coadministered gintonin with DPZ intravenously or orally to rats. Then we collected the cerebral spinal fluid (CSF) and serum and determined the DPZ concentration through liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. Results: Intravenous, but not oral, coadministration of gintonin with DPZ increased the CSF concentration of DPZ in a concentration- and time-dependent manner. Gintonin-mediated enhancement of brain delivery of DPZ was blocked by Ki16425, a LPA1/3 receptor antagonist. Coadministration of vascular endothelial growth factor (VEGF) + gintonin with DPZ similarly increased CSF DPZ concentration. However, gintonin-mediated enhancement of brain delivery of DPZ was blocked by axitinip, a VEGF receptor antagonist. Mannitol, a BBB disrupting agent that increases the BBB permeability, enhanced gintonin-mediated enhancement of brain delivery of DPZ. Conclusions: We found that intravenous, but not oral, coadministration of gintonin facilitates brain delivery of DPZ from plasma via LPA1/3 and VEGF receptors. Gintonin is a potential candidate as a ginseng-derived novel agent for the brain delivery of DPZ for treatment of patients with AD.
Chen, Ling;Xiao, Hong;Wang, Zong-Hua;Huang, Yi;Liu, Zi-Peng;Ren, Hui;Song, Hang
BMB Reports
/
v.47
no.1
/
pp.39-44
/
2014
Increasing data shows miR-29a is a key regulator of oncogenic processes. It is significantly down-regulated in some kind of human tumors and possibly functionally linked to cellular proliferation, survival and migration. However, the mechanism remains unclear. In this study, we report miR-29a is significantly under-expressed in gastric cancer compared to the healthy donor. The microvessel density is negatively related to miR-29a expression in gastric cancer tissues. The ectopic expression of miR-29a significantly inhibits proliferation and invasion of gastric cancer cells. Furthermore, western blot combined with the luciferase reporter assays demonstrate that vascular endothelial growth factor A (VEGF-A) is direct target of miR-29a. This is the first time miR-29a was found to suppress the tumor microvessel density in gastric cancer by targeting VEGF-A. Taken together, these results suggest that miR-29a is a tumor suppressor in gastric cancer. Restoration of miR-29a in gastric cancer may be a promising therapeutic approach.
Objective: To explore the inhibiting effect and mechanism of Endostar injection concomitant with cryoablation on lung adenocarcinoma A549 xenografts in nude mice. Materials and Methods: A total of 24 nude mice with subcutaneous xenografts of the A549 cell line were established and divided into 4 groups when the maximal diameters of tumors became 1 cm: control group, Endostar group, cryoablation group and combination group (Endostar concomitant with cryoablation). The nude mice were sacrificed after 21-days treatment, tumour tissues were removed to measure their volume, in situ test of TdT-mediated dUTP nick end labeling (TUNEL) was adopted to determine the cellular apoptosis around freezing injury zones, and immunohistochemical SP test was applied for the detection of micro-vessel density (MVD) and vascular endothelial growth factor (VEGF) expression levels. Results: At 21-days after treatment, the growth velocities of control group, Endostar group, cryoablation group and combination group were $236.7{\pm}51.2%$, $220.0{\pm}30.6%$, $159.5{\pm}29.3%$ and $103.3{\pm}25.5%$ (P<0.01), while cellular apoptosis rates of tumors were $21.7{\pm}2.34%$, ($22.17{\pm}1.47$)%, $38.3{\pm}1.37%$ and $49.2{\pm}1.72%$, (P<0.01), respectively, according to the immunohistochemical test. MVD and VEGF expression levels in the combination group were both lower than in other groups (P<0.01), also being positively related (r=0.925, P<0.01). Conclusions: Endostar can significantly improve the inhibitory effects of cryoablation on xenografts of lung adenocarcinoma A549, and the mechanism is probably associated with its function as an inhibitor of tumour neo-angiogenesis through down-regulating VEGF expression.
Luo, Ting;Chen, Long;He, Ping;Hu, Qian-Cheng;Zhong, Xiao-Rong;Sun, Yu;Yang, Yuan-Fu;Tian, Ting-Lun;Zheng, Hong
Asian Pacific Journal of Cancer Prevention
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v.14
no.4
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pp.2433-2437
/
2013
Vascular endothelial growth factor (VEGF) is a potent regulator of angiogenesis and thereby involved in the development and progression of solid tumours. Associations between three VEGF gene polymorphisms (-634 G/C, +936 C/T, and +1612 G/A) and breast cancer risk have been extensively studied, but the currently available results are inconclusive. Our aim was to investigate associations between three VEGF gene polymorphisms and breast cancer risk in Chinese Han patients. We performed a hospital-based case-control study including 680 female incident breast cancer patients and 680 female age-matched healthy control subjects. Polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) analysis was performed to detect the three VEGF gene polymorphisms. We observed that women carriers of +936 TT genotypes [odds ratio (OR) =0.46, 95% confidence interval (CI) = 0.28, 0.76; P=0.002] or 936 T-allele (OR=0.81, 95% CI= 0.68, 0.98; P=0.03) had a protective effect concerning the disease. Our study suggested that the +1612G/A polymorphism was unlikely to be associated with breast cancer risk. The -634CC genotype was significantly associated with high tumor aggressiveness [large tumor size (OR=2.63, 95% CI=1.15, 6.02; P=0.02) and high histologic grade (OR=1.47, 95% CI= 1.06, 2.03; P=0.02)]. The genotypes were not related with other tumor characteristics such as regional or distant metastasis, stage at diagnosis, or estrogen or progesterone receptor status. Our study revealed that the VEGF -634 G/C and +936 C/T gene polymorphisms may be associated with breast cancer in Chinese Han patients.
We have recently reported the development of a high efficiency expression vector, pCK, which can drive a high level of gene expression in mouse skeletal muscle. In this study, we tested the therapeutic potential of pCK expressing human VEGF165, pCK-VEGF in the rabbit ischemic hind limb model. To determine the optimal dose of plasmid DNA, various concentrations of pCK-CAT were injected into the muscle of a rabbit hind limb and the levels of CAT activity were determined. It was found that the expression level of the exogenously added gene became stable between 250 and 1,000 $\mu$g. Based on this result, we tested whether intramuscular transfer of 500$\mu$g of pCK-VEGF could actually modulate collateral vessel development in a rabbit ischemic hind limb model. It was found that relative to the control group injected with the pCK lacking the VEGF sequence, single intramuscular doses (500$\mu$g) of pCK-VEGF produced statistically significant augmentation of collateral vessels as determined by the angiographic vessel count, maximal blood flow by Doppler flowmeter and the number of capillaries by histology. These results suggest that a single 500$\mu$g-delivery of pCK-VEGF is potent enough to induce sufficient angiogenic activity and achieve therapeutic benefit on this rabbit model.
Park, Soojung;Hwang, Ho-Myung;Lee, Young-Ho;You, Kwan-Hee;Shin, Kee-Sun;Kwon, O-Yu
Animal cells and systems
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v.7
no.3
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pp.265-269
/
2003
Vascular endothelial growth factor (VEGF) is a potent regulator of normal and abnormal angiogenesis. Recent literature suggests that VEGF has several activities that may amplify acute inflammation reactions. Dysregulated VEGF expression has been implicated as a major contributor to the development of a number of common disease pathologies. One of common mutations in the 3'- untranslated region of the VEGF gene, a C\longrightarrowT exchange at nucleotide position 936, has been found to be significantly associated with VEGF expression levels in the plasma from a previous Austrian study. The frequency of this mutation could be important genetic information regarding tumor growth and angiogenesis related diseases. The aim of this study was to investigate the frequency distribution of this mutation in general Korean population. We examined the statistical data from 207 healthy Korean subjects. Observed numbers (%) of 936T were 28.5 (CT) and 3.9 (TT), respectively. The mutant allele frequency of 936T in Korean subjects was 0.18, which appeared somewhat higher than that in Austrian subjects.
Wang, Yujue;Huang, Mengwei;Yang, Xiaofeng;Yang, Zhongmei;Li, Lingling;Mei, Jie
The Korean Journal of Physiology and Pharmacology
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v.22
no.4
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pp.409-417
/
2018
Pre-eclampsia (PE) is a pregnancy disorder that is characterised by severe hypertension and increased risks of foetal and maternal mortality. The aetiology of PE not completely understood; however, maternal nutrition and oxidative stress play important roles in the development of hypertension. The treatment options for PE are currently limited to anti-hypertensive drugs. Punicalagin, a polyphenol present in pomegranate juice, has a range of bioactive properties. The effects of supplementation with punicalagin on angiogenesis and oxidative stress in pregnant rats with induced hypertension were investigated. The pregnant rats were randomly divided into five experimental groups (n=12 per group). Hypertension was induced using an oral dose of NG-nitro-L-arginine methyl ester (L-NAME, 50 mg/kg/day) on days 14-19 of pregnancy. Punicalagin (25, 50 or 100 mg/kg) was given orally on days 14-21 of pregnancy. Punicalagin treatment at the tested doses significantly reduced diastolic, systolic, and mean arterial blood pressure in L-NAME treated rats from day 14. Punicalagin also restored angiogenic balance by increasing the expression of vascular endothelial growth factor and downregulating vascular endothelial growth factor receptor-1/fms-like tyrosine kinase-1. Punicalagin, significantly increased the placental nitric oxide levels as compared to PE group. The increased levels of oxidative stress in rats with PE were markedly decreased by treatment with punicalagin. Punicalagin at the tested doses markedly (p<0.05) enhanced the placental antioxidant capacity in L-NAME-treated rats. The raised catalase activity observed following L-NAME induction was significantly (p<0.05) and restored to normal activity levels in punicalagin treatment. Further, 100 mg dose of punicalagin exhibited higher protective effects as compared to lower doses of 25 and 50 mg. This study shows that supplementation with punicalagin decreased blood pressure and oxidative stress and restored angiogenic balance in pregnant rats with induced PE.
Bojungbangdocktang (BJBDT), a formula of eight Oriental herbs, is a modified herbal prescription of Bangdoktang and Bojungbangamtang. Recently, BJBDT was demonstrated to inhibit angiogenesis induced by vascular endothelial growth factor in human umbilical vein endothelial cells, enhance hematopoiesis and protect cisplatin-induced cytotoxicity in normal MCF-10A breast cells. Nevertheless, there is no safety study of BJBDT before clinical trial so far. Thus, in the current study, we investigated the toxicity about ethanol-extracted BJBDT. Male and female Spraque Dawley (SD) rats were given orally by BJBDT at 250, 500, and 1000 mg/kg for 4 weeks. Mortality, clinical signs and measured change of body weight, food consumption and water consumption were observed. In addition, we performed ophthalmologic, urinary, hematological, blood serum biochemical and histopathological examination. Any general toxicity was not found in BJBDT treated group. Also, there were no significant differences in the parameters such as body weight, food consumption and water consumption, a lot of urine and blood factor levels except HCT, MCHC, Ca, TG, Glucose and T-Bilirubin level compared with control group. Although HCT was elevated and TG was decreased in male rats, and MCHC, Glucose and T-Bilirubin were elevated and Ca and HCT were decreased in female rats, these were within normal ranges. Finally, we determined that maximum tolerated dose (MTD) was 1000 mg/kg and no observed adverse effect level (NOAEL) was 500 mg/kg. Taken together, these results demonstrated that BJBDT is very safe to SD rats.
Yun, SeungPil;Yun, Chul Won;Lee, Jun Hee;Kim, SangMin;Lee, Sang Hun
Biomolecules & Therapeutics
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v.26
no.5
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pp.464-473
/
2018
Cripto is a small glycosylphosphatidylinositol-anchored signaling protein that can detach from the anchored membrane and stimulate proliferation, migration, differentiation, vascularization, and angiogenesis. In the present study, we demonstrated that Cripto positively affected proliferation and survival of mesenchymal stem cells (MSCs) without affecting multipotency. Cripto also increased expression of phosphorylated janus kinase 2 (p-JAK2), phosphorylated signal transducer and activator of transcription 3 (p-STAT3), 78 kDa glucose-regulated protein (GRP78), c-Myc, and cyclin D1. Notably, treatment with an anti-GRP78 antibody blocked these effects. In addition, pretreatment with STAT3 short interfering RNA (siRNA) inhibited the increase in p-JAK2, c-Myc, cyclin D1, and BCL3 levels caused by Cripto and attenuated the pro-survival action of Cripto on MSCs. We also found that incubation with Cripto protected MSCs from apoptosis caused by hypoxia or $H_2O_2$ exposure, and the level of caspase-3 decreased by the Cripto-induced expression of B-cell lymphoma 3-encoded protein (BCL3). These effects were sensitive to down-regulation of BCL3 expression by BCL3 siRNA. Finally, we showed that Cripto enhanced expression levels of vascular endothelial growth factor (VEGF), fibroblast growth factor (FGF), and hepatocyte growth factor (HGF). In summary, our results demonstrated that Cripto activated a novel biochemical cascade that potentiated MSC proliferation and survival. This cascade relied on phosphorylation of JAK2 and STAT3 and was regulated by GRP78. Our findings may facilitate clinical applications of MSCs, as these cells may benefit from positive effects of Cripto on their survival and biological properties.
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