Huaihua Medical College
Huaihua Medical College
Yong Y.,Huaihua Medical College |
Kai H.,Huaihua Medical College |
Bao-Shun Z.,Southwest University |
Xue-Gang L.,Southwest University
Pharmacognosy Magazine | Year: 2014
In this study, the fluorescence analysis was used to reveal the interaction between berberine derivatives and plasmid DNA the results showed that berberine (C0) and its 8-alkyl derivatives can enhance the fluorescent intensity of plasmid DNA. Compared with 8-dodecyl-(C12) and 8-hexadecyl-(C16) berberine, 8-alkylberberine with shorter alkyl group, such as 8-ethyl (C2), 8-butyl (C4), 8-hexyl (C6), and 8-octyl (C8) berberine derivatives showed higher fluorescence increasing effect. Among all compounds, C4 showed highest fluorescence increasing effect. All compounds tested obviously enhanced fluorescent intensity at the concentration of 6.25 × 10-5 mol/L these results suggested that berberine and its derivatives can be selectively inserted to the grooves running down the plasmid DNA helix, thus, lead to the increase of fluorescence intensity of the reaction system. Also, adding proper length of aliphatic chain to berberine could promote the interaction between DNA and berberine derivatives the results of this study may lay some useful foundation for the development of berberine-based medicine agents.
Yi J.,Southwest University |
Ye X.,Southwest University |
Wang D.,Southwest University |
He K.,Huaihua Medical College |
And 3 more authors.
Journal of Ethnopharmacology | Year: 2013
Ethnopharmacological relevance: Rhizoma Coptidis (RC), a widely used traditional Chinese medicine, has been used for the treatment of heat-clearing and detoxifying, but there is very little information on its safety. Aim of the study: To provide information on the safety of RC, we evaluated the toxicity of the crude RC and RC alkaloids (berberine, coptisine, palmatine and epiberberine) including cytotoxicity, acute toxicity in mice and sub-chronic toxicity in rats. Materials and methods: The cytotoxicity of RC alkaloids was tested in HepG2 and 3T3-L1 cells by the MTT assay. The acute toxicity of RC alkaloids was tested in mice and the mortality was calculated at the end of experiment. For sub-chronic toxicity study, the rats were treated with the RC alkaloids at a dose of 156 mg/kg/day and RC at a dose of 521 mg/kg/day for 90 days. Mortality, clinical signs, body weight changes, organ weights, urinalysis and hematological parameters, gross necropsy and histopathology were monitored during the study period. Results: The cell assay indicates that the IC50 values of berberine, coptisine, palmatine and epiberberine in HepG2 cells were 48.17, 64.81, 112.80 and 120.58 μg/mL, which in 3T3-L1 cells were 41.76, 56.48, 84.32 and 104.18 μg/mL, respectively. In the acute toxicity assay, the LD50 values of four alkaloids were 713.57, 852.12, 1533.68 and 1360 mg/kg, respectively. However, in the sub-chronic toxicity study, no mortality and morbidity were observed which could be related to RC alkaloids and RC treatment. Besides, there was no abnormality in clinical signs, body weights, organ weights, urinalysis, hematological parameters, gross necropsy and histopathology in any of the animals after the oral administration of RC alkaloids and RC. Conclusions: Taking these results together, we came to the conclusion that the toxicity of berberine is the maximum and palmatine is the minimal in four RC alkaloids. The currently recommended doses of RC alkaloids and RC consumed are relatively safe. © 2012 Elsevier Ireland Ltd.
Yu X.-H.,University of South China |
Tang Z.-B.,University of South China |
Liu L.-J.,Huaihua Medical College |
Qian H.,Huaihua Medical College |
And 4 more authors.
Clinica Chimica Acta | Year: 2014
Apelin is an adipokine that has been identified as an endogenous ligand for the orphan receptor APJ. Apelin and APJ are expressed in a diverse range of tissues with particular preponderance for the heart and vasculature. Apelin has powerful positive inotropic actions and causes endothelium- and nitric oxide-dependent vasodilatation. Growing evidence shows that apelin/APJ system functions as a critical mediator of cardiovascular homeostasis and is involved in the pathophysiology of cardiovascular diseases. Targeting apelin/APJ axis produces protection against cardiovascular diseases. In the current review we have summarized recent data concerning the role and therapeutic potential of apelin/APJ in several major cardiovascular diseases. An increased understanding of the cardiovascular actions of apelin/APJ system will help to develop novel therapeutic interventions for cardiovascular diseases. © 2013 Elsevier B.V.
Li L.,Sun Yat Sen University |
Du K.,Sun Yat Sen University |
Wang Y.,Sun Yat Sen University |
Jia H.,Sun Yat Sen University |
And 4 more authors.
Dalton Transactions | Year: 2013
Three mononuclear copper complexes [Cu(PDTP)Cl2] (PDTP = 4-phenyl-2,6-di(thiazole-2-yl)pyridine, CuPDTP), [Cu(ADTP)Cl2] (ADTP = 4-(anthracen-9-yl)-2,6-di(thiazole-2-yl)pyridine, CuADTP) and [Cu(BFDTP)Cl2] (BFDTP = 4-(benzofuran-2-yl)-2,6-di(thiazole-2-yl) pyridine, CuBFDTP) were synthesized and characterized. The X-ray single crystallography results indicated that the Cu(ii) ions showed slightly distorted square pyramid coordination environments, and the ligands deviated from ideal planarity in all three compounds. Based on the DNA binding studies, it was demonstrated that these three complexes exhibited weak DNA binding strengths, which were most likely groove binding modes. CuPDTP, CuADTP and CuBFDTP induced efficient DNA cleavage in the dark without the addition of external catalysts (oxidant or reductant). In contrast, in the presence of reducing or oxidizing agents, the nuclease activities increased more than 10-fold. Mechanistic investigations revealed the participation of reactive oxygen species, which can be trapped by ROS radical scavengers and ROS sensors. In the same experimental conditions, the free ligands and CuCl2 did not display any DNA cleaving activity. This result indicates that the complexes, rather than their components, play a significant role in the nuclease reaction process and that DNA cleavage may be initiated in an oxidative pattern. The proposed mechanism was attributed to the in situ activation of molecular oxygen by the oxidation of the copper complexes. In the MTT cytotoxicity studies, the three Cu(ii) complexes exhibited an antitumor activity against the HeLa, BEL-7402 and HepG2 tumor cell lines. The HeLa cells treated with Cu(ii) complexes demonstrated marked changes in their nuclear morphology, which were detected by Hoechst 33258 nuclear staining and acridine orange/ethidium bromide (AO/EB) staining assays. Nuclear chromatin cleavage also was observed from alkaline single-cell gel electrophoresis (comet assay). © 2013 The Royal Society of Chemistry.
Liu Z.,National Institute for Communications Disease Control and Prevention |
Liu Z.,Huaihua Medical College |
Zheng H.,National Institute for Communications Disease Control and Prevention |
Gottschalk M.,University of Montréal |
And 5 more authors.
PLoS ONE | Year: 2013
Streptococcus suis is an important zoonotic agent causing severe diseases in pigs and humans. To date, 33 serotypes of S. suis have been identified based on antigenic differences in the capsular polysaccharide. The capsular polysaccharide synthesis (cps) locus encodes proteins/enzymes that are responsible for capsular production and variation in the capsule structures are the basis of S. suis serotyping. Multiplex and/or simplex PCR assays have been developed for 15 serotypes based on serotype-specific genes in the cps gene cluster. In this study, we developed a set of multiplex PCR (mPCR) assays to identify the 33 currently known S. suis serotypes. To identify serotype-specific genes for mPCR, the entire genomes of reference strains for the 33 serotypes were sequenced using whole genome high-throughput sequencing, and the cps gene clusters from these strains were identified and compared. We developed a set of 4 mPCR assays based on the polysaccharide polymerase gene wzy, one of the serotype-specific genes. The assays can identify all serotypes except for two pairs of serotypes: 1 and 14, and 2 and 1/2, which have no serotype-specific genes between them. The first assay identifies 12 serotypes (serotypes 1 to 10, 1/2, and 14) that are the most frequently isolated from diseased pigs and patients; the second identifies 10 serotypes (serotypes 11 to 21 except 14); the third identifies the remaining 11 serotypes (serotypes 22 to 31, and 33); and the fourth identifies a new cps cluster of S. suis discovered in this study in 16 isolates that agglutinated with antisera for serotypes 29 and 21. The multiplex PCR assays developed in this study provide a rapid and specific method for molecular serotyping of S. suis. © 2013 Liu et al.
Mi X.,Hunan University |
Mi X.,Huaihua Medical College |
He F.,Hunan University |
Xiang M.,Hunan University |
And 2 more authors.
Analytical Chemistry | Year: 2012
The key factors that control the spread and mortality rate of tuberculosis (TB) are rapid detection and diagnosis. However, the current detection of Mycobacterium tuberculosis (M. tuberculosis) cannot meet the recommended requirements for clinical diagnosis in turnaround time. In this paper, the feature of phage D29 that infects M. tuberculosis and Mycobacterium smegmatis (M. smegmatis) was combined with the sensitivity of multichannel series piezoelectric quartz crystal sensor (MSPQC) to detect M. tuberculosis. The phage D29 played a role of inhibiting the growth of M. tuberculosis and M. smegmatis. M. tuberculosis is used to protect phage D29 from being killed by ferrous ammonium sulfate (FAS) and carries phage D29 into the detection medium containing M. smegmatis. The action of M. smegmatis indicated the existence state of phage D29 in the detection medium. The growth curve of M. smegmatis obtained by MSPQC indicated the state of the growth of M. tuberculosis. Therefore, M. tuberculosis in the sample could be rapidly detected by evaluating the extent of inhibiting the growth of M. smegmatis compared with the normal growth of M. smegmatis. The detection of M. tuberculosis was transformed into the detection of M. smegmatis, which is more rapid and sensitive than that of M. tuberculosis. For 10 2 cfu/mL of M. tuberculosis in clinical sample, the turnaround time was less than 30 h. Although statistical analysis showed that no significant difference existed between the results of the proposed method here and the BACTEC960 MGIT method in clinical M. tuberculosis detection, the phage amplified MSPQC (PA MSPQC) method presented here was faster and more economical. © 2011 American Chemical Society.
Zeng Y.C.,Hong Kong Polytechnic University |
Li D.,Huaihua Medical College |
Loke A.Y.,Hong Kong Polytechnic University
Nursing and Health Sciences | Year: 2011
This study explored the meaning of "quality of life" among Chinese survivors of cervical cancer and the impact of cervical cancer survivorship on these women's quality of life. Written responses were used as the means of data collection. The qualitative data were analyzed by using a qualitative content analysis. The meaning of "quality of life", as perceived by 35 Chinese survivors of cervical cancer, included being free of disease, having a good standard of living, having a harmonious family atmosphere, and having a harmonious sex life. The impact of cervical cancer on the Chinese women's quality of life included physical and psychological sequelae, family distress, financial burden, and disruptions to their social functioning and sexual life. Nevertheless, there were positive gains that were reported by these survivors, including changes in their outlook on life, treasuring their life, and better family relationships. This study revealed that the Chinese survivors of cervical cancer identified their sexual life as one of the essential indicators of quality of life. It is necessary to raise nurses' awareness so that women's sexuality-related concerns are addressed. Health professionals also should provide relevant supportive care in order to address this target population's physical and psychosocial needs across the survivorship continuum. © 2011 Blackwell Publishing Asia Pty Ltd.
Wu W.-H.,Central South University |
Wu W.-H.,Huaihua Medical College |
Hu C.-P.,Central South University |
Chen X.-P.,Central South University |
And 4 more authors.
American Journal of Hypertension | Year: 2011
BackgroundIt has been reported that microRNA-130a (miR-130a) targets GAX, the growth arrest-specific homeobox, which inhibits proliferation, differentiation, and migration of vascular smooth muscle cells (VSMCs). In the present study, we therefore investigated the effect of miR-130a on proliferation of cultured VSMCs and the potential role of miR-130a in vascular remodeling during hypertension.MethodsProliferation of VSMCs was determined by 5-bromo-2′-deoxyuridine (BrdU) incorporation method. The expression of miR-130a and GAX was analyzed by quantitative reverse transcription-PCR. The protein expression of GAX was analyzed by western blot. The mimic and inhibitor of miR-130a were used in gain-of-function and loss-of-function in vitro studies, respectively. The correlation of miR-130a with vascular remodeling was observed in spontaneously hypertensive rats (SHRs).ResultsMiR-130a mimic at the concentration of 25 or 50nmol/l significantly promoted proliferation of VSMCs. The expression of miR-130a was upregulated in the remodeled aorta and superior mesenteric artery of SHRs. The expression of GAX was downregulated in VSMCs transfected with miR-130a mimic and in thoracic aorta and superior mesenteric artery of SHRs. Angiotensin II (Ang II) promoted proliferation of VSMCs and upregulated miR-130a expression concomitantly with a decreased GAX expression in a concentration-and time-dependent manner. The proliferative effects of Ang II on VSMCs were suppressed partly by the miR-130a inhibitor.ConclusionsThese results suggest that miR-130a is a novel regulator of proliferation of VSMCs via inhibiting the expression of GAX, which may contribute to vascular remodeling in hypertension. © 2011 American Journal of Hypertension, Ltd.
Pu Y.C.,Huaihua Medical College
Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials | Year: 2012
To establish a method to identify the different origins of herba Evodia rutaecarpa by IR and provide a new technique for their identification and quality evaluation. The herba materials were extracted by chloroform and absolute alcohol, the powder and the extracts of Evodia rutaecarpa were mixed and pelleted with KBr. The slides were detected within 4000 - 400 cm(-1) by FIR spectrophotometry. The Difference of samples was studied. The infrared spectrums of Evodia rutaecarpa extracted by chloroform were obviously different. The method can be used to identify and appraise the different origins of herba Evodia rutaecarpa.
Qian H.,Huaihua Medical College |
Liu L.,Huaihua Medical College
Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology | Year: 2014
To explore the protective effect of hydrogen sulfide (H2S) on viral myocarditis (VMC) mice and its mechanism. Seventy BALB/c mice were randomly divided into 4 groups: normal control group (n=10), myocarditis group (n=20), DL-propargylglycine (PAG) group (n=20) and sodium hydrosulfide (NaHS) group (n=20). Mice in the latter three groups were inoculated with 0.1 mL Eagle's solution containing Coxsackievirus B3 (CVB3) intraperitoneally; whereas those in normal control group were treated with 0.1 mL Eagle's solution. On the day of inoculation, mice in PAG and NaHS groups received intraperitoneal administration with 40 mg/kg PAG and 50 μmol/kg NaHS, respectively; however, those in the other two groups were treated with PBS instead. PAG, NaHS or PBS were given one time for one day and persisted for 14 days. On day 15, all mice were killed after weighing body mass (BM). The mortality was compared among groups. Serum was separated and serum cardiac troponin I (cTnI) levels were detected using ELISA. The heart was removed and weighed to calculate heart mass (HM). Histological cross sections of heart were stained with hematoxylin-eosin, and myocardial histopathologic scores were counted under optical microscope. The activities of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione-peroxidase (GSH-Px) and catalase (CAT) in the homogenate of myocardium were examined. Myocardial interleukin (IL)-1β, IL-6 and tumor necrosis factor-α (TNF-α) contents were detected by ELISA. The expression level of myocardial nuclear factor-κB (NF-κB) p65 in the nucleus was examined using Western blotting. Compared with normal control group, the HM/BM, serum cTnI levels, myocardial MDA activity, NF-κB p65 expression level in the nucleus and myocardial contents of IL-1β, IL-6 and TNF-α were elevated, but myocardial SOD, GSH-Px and CAT activities were reduced in myocarditis group (P<0.05 or P<0.01). In comparison with myocarditis group, HM/BM, serum cTnI levels, myocardial histopathologic scores, myocardial MDA activity, NF-κB p65 expression level in the nucleus and myocardial contents of IL-1β, IL-6 and TNF-α significantly increased while myocardial SOD, GSH-Px and CAT activities significantly decreased in PAG groups (P<0.05). There was no significant difference in the mortality between PAG group and myocarditis group (P>0.05). The mortality, HM/BM, serum cTnI levels, myocardial histopathologic scores, myocardial MDA activity, NF-κB p65 expression level in the nucleus and myocardial contents of IL-1β, IL-6 and TNF-α were lower, while myocardial SOD, GSH-Px and CAT activities were higher in NaHS group than in myocarditis group (P<0.05). H2S can produce effective protection against VMC in mice. The mechanism may be associated with enhancing antioxidative ability and inhibiting inflammatory response.