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Jiang, Xian,Lan, Yan,Jin, Yuan-Zhe,Park, Joo Young,Park, Byung Geon,Ameer, Abdul Nasir,Park, Byung Rim The Korean Society of Pharmacology 2014 The Korean Journal of Physiology & Pharmacology Vol.18 No.4
Control of blood pressure is maintained by the interaction between the arterial baroreflex and vestibulosympathetic reflex during postural changes. In this study, the contributions of vestibular receptors and baroreceptors to the maintenance of blood pressure following acute hypotension were compared in terms of phosphorylated extracellular regulated protein kinase (pERK) expression in the nucleus tractus solitaries (NTS). Expression of pERK in the NTS was measured in conscious rats that had undergone bilateral labyrinthectomy (BL) and/or sinoaortic denervation (SAD) 5, 10, 20, and 40 min following acute hypotension induced by sodium nitroprusside (SNP) infusion. Expression of pERK increased significantly in the NTS in the control group following SNP infusion, and the expression peaked at 10 min after SNP infusion. The number of pERK positive neurons increased following SNP infusion in BL, SAD, and BL+SAD groups, although the increase was smaller than in control group. The BL group showed a relatively higher reduction in pERK expression than the SAD group, and the pERK expression in the NTS was localized to the caudal portion of the nuclei in the BL and SAD groups. These results suggest that the vestibular receptors may play a key role in maintaining blood pressure following acute hypotension; thus, the vestibular system may contribute to compensate for orthostatic hypotension.
A New ent-Kaurane type Diterpenoid Glycoside from Inula japonica Thunb
Jiang Jiang Qin,Jia Xian Zhu,Wei Dong Zhang1,2,Yan Zhu,Jian Jun Fu,Xiao Hua Liu,Hui Zi Jin 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.10
A new ent-kaurane type diterpenoid glycoside, 17-O-β-D-glucopyranosyl-16α-ent-kauran-19-oic acid (1), together with 17-hydroxy-16α-ent-kauran-19-oic acid (2), 16α,17-dihydroxyl-ent-kauran-19-oic acid (3), and 16α-hydroxy-17-acetoxy-ent- kauran-19-oic acid (4) were isolated from the aerial parts of Inula japonica Thunb. The structure of 1 was determined mainly by use of 1D and 2D NMR spectroscopic techniques including HSQC, 1H-1H COSY, HMBC, and NOESY. In addition, 4 exhibited significant inhibitory activity on NO production in LPS-stimulated RAW264.7 cells with IC50 value of 14.3 μg/mL.
Xian Jiang,Yan Lan,Yuan-Zhe Jin,박주영,박병건,Abdul Nasir Ameer,박병림 대한약리학회 2014 The Korean Journal of Physiology & Pharmacology Vol.18 No.4
Control of blood pressure is maintained by the interaction between the arterial baroreflex andvestibulosympathetic reflex during postural changes. In this study, the contributions of vestibularreceptors and baroreceptors to the maintenance of blood pressure following acute hypotension werecompared in terms of phosphorylated extracellular regulated protein kinase (pERK) expression in thenucleus tractus solitaries (NTS). Expression of pERK in the NTS was measured in conscious rats thathad undergone bilateral labyrinthectomy (BL) and/or sinoaortic denervation (SAD) 5, 10, 20, and 40min following acute hypotension induced by sodium nitroprusside (SNP) infusion. Expression of pERKincreased significantly in the NTS in the control group following SNP infusion, and the expressionpeaked at 10 min after SNP infusion. The number of pERK positive neurons increased following SNPinfusion in BL, SAD, and BL+SAD groups, although the increase was smaller than in control group. The BL group showed a relatively higher reduction in pERK expression than the SAD group, andthe pERK expression in the NTS was localized to the caudal portion of the nuclei in the BL and SADgroups. These results suggest that the vestibular receptors may play a key role in maintaining bloodpressure following acute hypotension; thus, the vestibular system may contribute to compensate fororthostatic hypotension.
Haoran Jiang,Yong Jiang,Xianli Zhu,Yachao Wang 한국고분자학회 2020 Macromolecular Research Vol.28 No.13
Intumescent flame retardant coating modified by aluminate coupling agent were prepared via sol-gel method using ammonium polyphosphate, polyacrylamide, aluminate coupling agent (ACA), and boron nitride (BN). The effect of modification of ACA on its flame retardant and characterization were preliminarily studied by cone calorimeter, scanning electron microscope, surface tensiometer and contact angle measurement. It is found that the addition of ACA can increase the expansion rate of carbon layer, and a stronger blocking effect can lead to a better property of flame retardant. The sample containing BN, after being modified by 3M NaOH and ACA, dramatically decreases heat release rate, especially reduce the peak heat release rate (pHRR) by 54% and total heat release by 16%, respectively. Moreover, the time to ignition was delayed by 175%. Through examining the residues and pyrolysis products of the coating samples, the mechanism of enhanced flame retardant that promotes the char-forming and heat barrier of the modification of ACA and BN is proposed. This work can offer a significant guide for further studying of ACA and modified BN on the flame retardant.
Phenylpropanoids and Lignanoids from Euonymus acanthocarpus
Jia Xian Zhu,Hui Zi Jin,Jie Ren,Jiang Jiang Qin,Xiangrong Cheng,Qi Zeng,Fei Zhang,Shi Kai Yan,Wei Dong Zhang 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.10
A new phenylpropanoid derivative (1), along with five phenylpropanoids (2-6), two monoepoxy lignans (8-9), one bisepoxy lignan (10), two cyclolignans (11-12), six neolignans (7, 13-17), two mixed lignan-neolignans (18-19), two lignan glycosides (20-21), and four flavonolignans (22-25), were isolated from the stems and twigs of Euonymus acanthocarpus. Compounds 2-3, 6-8, 12,and 14-25 were obtained from Celastraceae family for the first time, and compounds 5 and 9 were isolated from Euonymus genus for the first time. All the compounds were tested for cytotoxicity against SK-OV-3 and MCG-803 human tumor cell lines. Compounds 3, 10, 12, and 18 showed weak cytotoxicity against SK-OV-3 cell line, and compounds 3-4, 10-13, and 19 showed weak cytotoxicity against MCG-803 cell line.
Jiang, Chang,Liao, Fang-Xin,Rong, Yu-Ming,Yang, Qiong,Yin, Chen-Xi,He, Wen-Zhuo,Cai, Xiu-Yu,Guo, Gui-Fang,Qiu, Hui-Juan,Chen, Xu-Xian,Zhang, Bei,Xia, Liang-Ping Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.13
Objective: To compare the efficacy of taxane-based regimens in the first line setting retrospectively in Chinese patients with recurrent and/or metastatic esophageal cancer. Methods: We analyzed 102 recurrent and/or metastatic esophageal cancer patients who received taxanes-based regimens in a first-line setting from January 2009 to December 2013. Sixteen (15.7%) patients were administered Nab-PTX based chemotherapy and 86 patients (84.3%) received paclitaxel (PTX) or docetaxel (DTX) based chemotherapy. Patients in the PTX/DTX group could be further divided into TP (71 patients) and TPF (15 patients) groups. Results: The objective response rate (ORR) of all patients was 20.6%, and the disease control rate (DCR) was 67.6%. The median overall survival (OS) was 10.5 months (95% CI 10.1-16.4) and the median progression-free survival (PFS) was 6.04 months (95% CI 5.09-7.91). The DCR was higher in the TPF group than the TP group (93.3% vs. 59.1%; p = 0.015 ). There were no significant differences in ORR, OS, and PFS among Nab-PTX, TPF and TP groups. Conclusions: The three regimens of Nab-PTX based, TP and TPF proved active in a first line setting of Chinese patients with recurrent and/or metastatic esophageal cancer, and should thus be regarded as alternative treatments.
Experimental study of TiO2 hollow microspheres removal on elemental mercury in simulated flue gas
Jiang Wu,Xian Li,Jian-Xing Ren,Xuemei Qi,Ping He,Bu Ni,Chong Zhang,Chengzhen Hu,Jun Zhou 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
TiO2 hollow sphere was synthesized by hydrothermal method using trifluoroacetic acid (TFA) andTi(SO4)2 as raw materials, and it was applied to photocatalytic oxidization of elemental mercury (Hg0) inthe simulated flue gas. The prepared samples were well characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectronspectroscopy (XPS), UV–vis diffuse reflectance spectra (UV-vis DRS) and nitrogen adsorption/desorption. The results showed that only anatase phase TiO2 hollow sphere was obtained. The average diameter ofTiO2 hollow spheres was about 800 nm and the shell thickness was about 200–400 nm. When M, themolar ratio of TFA to Ti(SO4)2, was higher than a certain value, the photocatalytic activity of preparedTiO2 hollow spheres began to reduce. When M = 2, addition TFA content was the best quantity, which gotthe best TiO2 hollow spheres and provided the most appropriate F decomposed from TFA during thesample preparation, which was helpful to its photocatalytic ability. In the experimental temperaturerange, the photocatalytic oxidation efficiency decreased with the increasing of reaction temperature, andthe intensity of UV irradiation had an important effect on the photocatalytic reaction. When UVirradiation intensity was 303.45 mW cm 2 and reaction temperature was 55 8C, TiO2 hollow spheresample prepared at M = 2 had the highest photocatalytic ability and the mercury removal efficiencyreached up to 82.75%.
Apoptotic Effect of Propyl Gallate in Activated Rat Hepatic Stellate Cells
Xian-Hua Che,손동환,Wen-Yi Jiang,Daya Ram Parajuli,Yu-Zhe Zhao,이성희 대한약학회 2012 Archives of Pharmacal Research Vol.35 No.12
Hepatic stellate cells (HSCs) play a central role in liver fibrosis. Inhibition of HSC growth and induction of apoptosis have been proposed as therapeutic strategies for the treatment and prevention of liver fibrosis. Propyl gallate (PG) is an antioxidant widely used in processed foods, cosmetics and medicinal preparations. However, the anti-fibrotic effect of PG in liver injury is unclear. In this study, we investigated whether PG could induce apoptosis in activated HSCs. Treatment of activated HSCs with PG inhibited cell viability in a dose- and time-dependent manner. PG induced apoptosis as demonstrated by morphological changes, poly(ADP-ribose) polymerase (PARP) cleavage, caspase-3 cleavage, increased Bad expression, and decreased Bcl-2 protein expression. Through stimulation of the activation of c-Jun NH2-terminal protein kinase (JNK) and p38 mitogen-activated protein kinases (MAPK) by PG treatment, we demonstrated that JNK and p38 MPAK are not involved in PG-induced apoptosis using their specific inhibitors. Taken together, these findings indicate that PG induces apoptosis in activated HSCs. The potential anti-fibrotic effect of PG warrants further evaluation.