Information of metabolic enzymes and transporters, physiological parameters of animals and demography of Chinese people were integrated to establish a digital liver model (DLM) based on metabolism and transporter and coded with VBA. Clearance and drug-drug interaction (DDI) of candidate drugs in animal and human could be predicted based on the pharmacokinetic data obtained from in vitro and in vivo experiments. Pravastatin and pitavastatin were selected as the samples to examine this model, where their clearance and their DDI with cyclosporine were predicted. The results showed that the predicted values of median parameters in same species were within twofold of observed values for 83.3% (5/6). The program's successful prediction in DDI tendency might indicate its application in optimizing the dosage regimen and reducing the risk of clinical trial.
Animals ; Area Under Curve ; Biological Transport ; Computer Simulation ; Cyclosporine ; pharmacokinetics ; Drug Interactions ; Humans ; Liver ; metabolism ; Metabolic Clearance Rate ; Models, Biological ; Pravastatin ; blood ; pharmacokinetics ; Quinolines ; blood ; pharmacokinetics

Glutathione is a tripeptide comprised by L-glutamate, L-cysteine, and glycine, that serves antioxygenation and deintoxication functions within the cell. Recent study has found that glutathione is the main driving force for bile salt-independent bile flow, impaired biliary excretion of glutathione can lead to cholestasis. This review focuses on hepatobiliary transport of glutathione and its role in cholestasis. Based on the evidence of choleretic effect of glutathione, enhancement of biliary excretion of glutathione may be a good strategy for prevention and treatment of cholestasis.
Animals ; Biological Transport ; Cholestasis ; chemically induced ; metabolism ; prevention & control ; Estrogens ; adverse effects ; Glutathione ; metabolism ; Humans ; Jaundice, Chronic Idiopathic ; genetics ; Liver ; metabolism ; Multidrug Resistance-Associated Proteins ; genetics ; metabolism ; Mutation ; Phalloidine ; adverse effects ; Ursodeoxycholic Acid ; therapeutic use

This study was aimed to detect the methylation status of FHIT gene promoter region in the DNA from plasma of patients with myelodysplastic syndrome (MDS), and to investigate the demethylating effect of decitabine. Methylation-specific PCR method was used to detect the methylation status of FHIT gene promoter region in the DNA from plasma of 4 patients with MDS before and after treatment with decitabine plus semis CAG therapy (among them, 1 case of newly diagnosed MDS, 3 cases progressed into acute leukemia). The results indicated that 3 cases were found to have an increased methylation in the promoter region. After treatment with decitabine plus semis CAG, increased methylation was reversed in 2 cases. In 4 cases, 2 cases displayed clinical response. It is concluded that FHIT gene hypermethylation is associated with MDS pathogenesis. Decitabine has demethylating effect on the FHIT gene hypermethylation of plasma from MDS patients. Detecting the methylation status of FHIT gene in DNA from plasma may play a role in MDS auxiliary diagnosis or prognosis.
Acid Anhydride Hydrolases ; genetics ; Adult ; Aged ; Azacitidine ; analogs & derivatives ; therapeutic use ; DNA ; blood ; DNA Methylation ; Female ; Humans ; Male ; Middle Aged ; Myelodysplastic Syndromes ; blood ; drug therapy ; Neoplasm Proteins ; genetics ; Promoter Regions, Genetic

OBJECTIVETo analyze the extent of myocardium and coronary artery lesion post atrioventricular ring radiofrequency catheter ablation with different tip catheters.

METHODSTwenty-one healthy dogs were randomly divided into 64 degrees C/50 W/100 s, 64 degrees C/100 W/100 s, 45 degrees C/45 W/100 s groups and ablated by 4 mm tip catheter, 8 mm tip catheter and irrigated tip catheter respectively. Left atrioventricular ring and right atrioventricular ring ablation were performed in all dogs. After ablation, myocardium lesion volume was calculated as 1/6pi x length x width x depth. Histological examinations were performed at the myocardium tissue at ablation sites.

RESULTSThe lesion depths post 8 mm tip catheter ablation (7.18 +/- 1.72) mm and irrigated tip catheter ablation (7.99 +/- 1.77) mm were similar and significantly deeper than that post 4 mm tip catheter ablation (4.54 +/- 1.38) mm, P < 0.01. Similar results were found in terms of lesion volume [(356.76 +/- 94.44) mm(3) post 8 mm tip catheter ablation, (391.69 +/- 109.54) mm(3) post irrigated tip catheter ablation and (191.34 +/- 74.52) mm(3) post 4 mm tip catheter ablation]. Five (5/42, 11.9%) transmural myocardium necrosis and 8 (8/42, 19%) coronary artery lesions were observed post ablations.

CONCLUSIONThe extents of post ablation myocardium and coronary artery lesion were significantly higher induced by 8 mm tip catheter and irrigate tip catheter compared those by 4 mm tip catheter.

Animals ; Cardiac Catheterization ; adverse effects ; Catheter Ablation ; adverse effects ; Coronary Vessels ; pathology ; Dogs ; Myocardium ; pathology

OBJECTIVETo investigate the prognostic predictors of nasal NK/T cell lymphoma.

METHODSThe clinicopathologic feature data of 61 patients with nasal NK/T cell lymphoma proven by pathological examination from Jan. 1997 to Jan. 2005 were collected. Expression of survivin, CD44, nm23, p53, Ki-67, MDR-1 and CD95 was detected by immunohistochemical staining in 30 patients with available histologic specimens. The correlation between these factors and prognosis were analyzed.

RESULTSIn univariate analysis, performance status, LDH level, clinical stage, initial treatment response, CD56, Ki-67 and CD95 were found to be the prognostic factors associated with time to progression (TTP) in nasal NK/T cell lymphoma, while the performance status, B symptoms, LDH level, initial treatment response, Ki-67 and CD95 were demonstrated as prognostic factors related to overall survival. In multivariate analysis, clinical stage, initial treatment response and performance status were independent prognostic factors for TTP, while the latter two factors were independent prognostic factors of overall survival.

CONCLUSIONClinical stage and initial treatment response, and performance status are found to be independent prognostic factors for TTP, whereas the latter two factors are demonstrated as independent prognostic factors of the overall survival. Overexpression of Ki-67 may be an unfavorable prognostic factor, but overexpression of CD95 may be a favorable one.

Adolescent ; Adult ; Aged ; Analysis of Variance ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Biomarkers, Tumor ; analysis ; Cyclophosphamide ; therapeutic use ; Doxorubicin ; therapeutic use ; Female ; Follow-Up Studies ; Humans ; Hyaluronan Receptors ; analysis ; Immunohistochemistry ; statistics & numerical data ; Inhibitor of Apoptosis Proteins ; Ki-67 Antigen ; analysis ; Killer Cells, Natural ; drug effects ; metabolism ; pathology ; Lymphoma, T-Cell ; drug therapy ; metabolism ; pathology ; Male ; Microtubule-Associated Proteins ; analysis ; Middle Aged ; Neoplasm Proteins ; analysis ; Neoplasm Staging ; Nose Neoplasms ; drug therapy ; metabolism ; pathology ; Prednisone ; therapeutic use ; Prognosis ; Proportional Hazards Models ; Vincristine ; therapeutic use ; fas Receptor ; analysis

BACKGROUNDMost of the studies on traditional Chinese medicine (TCM) 'spleen' deficiency syndrome in the recent 30 years were conducted only on the basis of single functional index, neglecting the study on the pathophysiologic internal relationship between spleen deficiency syndrome and gastric diseases in modern medicine. But it was at the subcellular molecular biological level that we explored the pathophysiologic basis of classification of spleen deficiency in chronic gastritis by detecting the bioactive substances in gastric mucosa nuclei and mitochondria.

METHODSBy means of optical microscope, scanning electron microscope (SEM), transmission electron microscopy (TEM) and histochemical staining, we conducted histopathological, subcellular ultrastructural analysis and nuclei and mitochondrial ultrastructural analysis of gastric mucosa of 188 spleen deficiency patients and of 42 voluntary blood donors. At the same time, bioactive substances were measured by means of X-ray energy dispersive analysis system (EDAX) image analysis system, radioimmunoassay method and chemiluminescence method.

RESULTSThe content of cAMP, superoxide dismutase (SOD), Zn and Cu in gastric mucosa, and the content of Zn and Cu in mitochondria decreased progressively in order of groups: healthy control (HC), spleen Qi deficiency without organic lesion (F-SQD), spleen Yang deficiency without organic lesion (F-SyangD), disease without symptoms group, spleen Qi deficiency with organic lesion (G-SQD), spleen Yang deficiency with organic lesion (G-SyangD), spleen Yin deficiency (SyinD) and spleen deficiency with Qi stagnation (SDQS), chronic spleen deficiency gastritis (CSG) and chronic atrophic gastritis (CAG); decreased in order of HC, intestinal metaplasia (IM)Ia, IMIb, IMIIa and IMIIb, P < 0.05. The content of DNA, Zn and Cu in nuclei progressively increased in order mentioned above, P < 0.05.

CONCLUSIONSThe quantitative changes of gastric mucosal cAMP, SOD, Zn, Cu, of mitochondrial Zn, Cu and of nuclear DNA, Zn and Cu are not only the substance base on which the lesion of gastric mucosa tissue structure occurs, but also the substance base on which spleen deficiency is classified. G-SQD and G-SyangD were more likely to be found in low-grade or middle-grade CSG and CAG, while SyinD and SDQS in middle-grade or high-grade CSG, CAG and IMIIb.

Adult ; Aged ; Chronic Disease ; Cyclic AMP ; analysis ; Female ; Gastric Mucosa ; pathology ; ultrastructure ; Gastritis ; metabolism ; pathology ; Humans ; Lipid Peroxides ; blood ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Splenic Diseases ; classification ; Superoxide Dismutase ; analysis

The release behavior of single pellet was investigated by LC/MS/MS method with tamsulosin hydrochloride (TSH) as the model drug of the research and then the pellets were divided into four groups according to the drug loading. Comparison of dissolution profiles of each group and capsule were performed using f1 and f2 factor methods to study the difference and similarity. The release profiles of single pellet, each group and capsule were analyzed using principle component analysis (PCA). The particle system was built through Matlab to get the target release profile. The result of this research demonstrated the release behavior of single pellet correlated well with the drug loading. While the dissolution profile of capsule as a reference, the similarity factor of dissolution profiles of the lower drug loading groups were 62.2, 67.1, 53.9, respectively and, 43.3 for highest drug loading group. The particle systems with different pellet distribution and same release profiles were built through release behavior of single pellet. It is of significance to investigate the release behavior of single pellets for studying the release regularity of multiple-unit drug delivery system.
Capsules ; Chemistry, Pharmaceutical ; Chromatography, Liquid ; Delayed-Action Preparations ; Drug Delivery Systems ; Drug Liberation ; Principal Component Analysis ; Sulfonamides ; administration & dosage ; chemistry ; Tandem Mass Spectrometry ; Technology, Pharmaceutical

BACKGROUNDSpleen in Traditional Chinese Medicine (TCM) is not actually the spleen in the anatomic sense designated in western medicine because its functions basically belong to the physiological category of digestive system in modern medicine, and it represents a macroscopic concept of digestion, absorption and nutrition metabolism. Spleen deficiency syndrome refers to the clinical phenomena such as hypofunction of digestion, absorption and nutrition metabolism. By integrating TCM with modern medicine, this paper is intended to explore the pathological basis of classification of spleen deficiency in chronic gastritis.

METHODBy means of optical microscope, scanning electron microscope (SEM), transmission electron microscope (TEM) and histochemical staining, we conducted histopathological and subcellular ultrastructural (nuclei and mitochondrial) analysis of gastric mucosa of 188 patients of spleen deficiency, and that of 42 voluntary blood donors without clinical symptoms.

RESULTSThe gastric mucosa of patients with spleen Qi deficiency (SQD) and spleen yang deficiency (SyangD) could either be affected by organic lesion (type G-occurring on the basis of chronic superficial gastritis (CSG), chronic atrophic gastritis (CAG)) or unaffected (type F-chiefly belonging to functional indigestion); spleen yin deficiency (SyinD) and spleen deficiency with Qi stagnation (SDQS) both occurred on the basis of CSG and CAG; and the degree of mucosa inflammatory cells infiltration, the degree of decrease in glands propria, and the incidence of IMIIb in CSG and CAG were more serious than those of G-SQD and G-SyangD, P < 0.05 - 0.01.

CONCLUSIONSpleen deficiency syndrome is likely to occur on the basis of organic lesion of gastric mucosa (disease with symptoms of both CSG or CAG and spleen deficiency symptoms), as well as on the basis of inorganic lesion of gastric mucosa (nondisease with symptoms, which is, despite spleen deficiency symptoms, there is no CSG or CAG). Besides, the clinical phenomenon of disease without symptoms (despite CSG or CAG, there is no spleen deficiency symptoms) occurres because of such factors as genetic diathesis and compensation. The lesion degree of CSG or CAG and the incidence of IMIIb of SyinD and SDQS are more serious than those CSG and CAG of G-SQD and G-SyangD.

Adult ; Chronic Disease ; Digestive System Diseases ; classification ; Epithelial Cells ; ultrastructure ; Female ; Gastric Mucosa ; pathology ; ultrastructure ; Gastritis ; pathology ; Humans ; Male ; Medicine, Chinese Traditional ; Splenic Diseases ; classification

OBJECTIVETo study the physiopathologic basis of Weikangfu Granule (WKFG) in treating precancerosis of gastric mucosa in patients of chronic gastritis with Pi-deficiency syndrome (CG-PDS).

METHODSOne hundred and fifteen patients of CG-PDS who suffered from intestinal metaplasia (IM) and atypical hyperplasia (ATHP) of gastric mucosa, were divided into two groups. The treated group (n = 61) was treated by WKFG with its ingredients modified according to the syndrome type of patients. The control group (n = 54) was treated with Weishu granule. The histopathological and subcellular ultrastructural changes were detected by optical microscope, screening electronic microscope, transmission electronic microscope and histochemical staining; the nuclear and mitochondrial ultrastructure of gastric mucosa were analyzed with energy dispersion X-ray analyser and image analysis system. And the changes of cAMP, lipid peroxide (LPO), superoxide dismutase (SOD) before and after treatment in the treated group were measured and compared with those of the health control group consisting of 15 volunteers.

RESULTSThe symptomatic and pathological therapeutic effect in the treated group were significantly superior to those in the control group (P < 0.05). The contents of Zn, Cu, cAMP, SOD and (3)H-TdR LCT in gastric mucosa of the treated group before treatment were all lower than those of the healthy control group, yet all these indexes markedly increased after treatment, while serum LPO level, which increased before treatment was lowered after treatment. All the changes showed statistical significance (P < 0.05 or P < 0.01).

CONCLUSIONWKFG can reverse IM and ATHP in patients of CG-PDS, and the effect may be realized by way of increasing the level of Zn, Cu, cAMP and SOD in gastric mucosa, promoting cell differentiation, enhancing cellular immunity and reducing oxygen free radicals and lipid peroxidation.

Adult ; Aged ; Antineoplastic Agents ; pharmacology ; therapeutic use ; Chronic Disease ; Copper ; analysis ; Cyclic AMP ; analysis ; Drugs, Chinese Herbal ; therapeutic use ; Gastric Mucosa ; chemistry ; pathology ; ultrastructure ; Gastritis, Atrophic ; pathology ; Humans ; Lipid Peroxides ; analysis ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Precancerous Conditions ; pathology ; Stomach Neoplasms ; pathology ; Superoxide Dismutase ; analysis ; Syndrome ; Yang Deficiency ; complications ; Zinc ; analysis

OBJECTIVETo investigate the clinicopathologic features, pathogenesis, diagnostic criteria and the relationship between different classification models and prognosis in Chinese patients with DLBCL, and try to look for the most appropriate classification model to predict clinical prognosis and therapeutic responses for Chinese patients with DLBCL.

METHODS181 cases of Chinese DLBCLs diagnosed according to the WHO 2008 classification were collected. Standard two-step Envision method of immunohistochemical staining was used to assess the expressions of CD20, CD3ε, CD79a, CD10, Mum-1, Bcl-6, GCET-1, FOXP1 and Ki-67. The phenotypic classifications were assessed according to the standard of Hans model and Chan model. Data were analyzed by χ(2) test and Life Table survival analysis with the SPSS14.0 statistical package.

RESULTSThe ratio of male to female in this cohort was 1.26:1. The median age of all patients was 57 yrs with the average age of 53.5 yrs. Of 61 cases (33.7%) primarily showed lymph node involvement. Gastrointestinal tract as the most involved extra-nodal organ was observed in 43 cases (35.8%). All patients with complete clinical follow-up materials survived from 1 - 120 months. The patients showed a high risk for death in the initial one and half years. Three year survival rate was 49.7% (90/181). Three year survival of 44 cases received R-CHOP (Rituximab, cyclophosphamide, doxorubicin, vincristine, bolus) was 76.9% (20/26), whereas 61.9% (60/97) in 119 cases received CHOP alone, R-CHOP group showed better prognosis (P = 0.017). All cases expressed one or more pan B cell markers, such as CD20 (176/179, 98.3%) and CD79a (62/77, 80.5%). For Hans model, 78 cases were classified as GCB group, while 103 cases as Non-GCB group. The ratio of Non-GCB to GCB was 1.32 without difference on the survival (P > 0.05). For the Chan's algorithm, 68 cases belonged to GCB subgroup, while 113 cases non-GCB subgroup. The ratio of non-GCB to GCB was 1.66. GCB subtype showed much better prognosis than non-GCB subtype according to Life Table survival analysis (P < 0.05).

CONCLUSIONThe epidemiology and clinicopathologic features of Chinese DLBCLs were similarly with the western cases. Chan's algorithm was a significant tool to predict the cell origin and clinical biology of Chinese DLBCLs.

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Algorithms ; Asian Continental Ancestry Group ; Child ; Child, Preschool ; Female ; Humans ; Lymphoma, Large B-Cell, Diffuse ; classification ; diagnosis ; pathology ; Male ; Middle Aged ; Models, Theoretical ; Prognosis ; Young Adult