Comet Assay ; DNA Damage ; Humans ; Occupational Exposure ; Population Surveillance ; methods

Epigenesis, Genetic ; Epigenomics ; Humans

Objective To explore the role of tissue inhibitor of metalloproteinase-1(TIMP-1) during renal senescence by using human TIMP-1 transgenic mice.Methods Renal histological changes of wild type mice and transgenic mice at the age of 3,12,24 months were observed by periodic acid-schiff(PAS)staining of paraffin sections.The numbers of F4/80 positive cells were detected by immunofluoreseence.The protein expressions of TIMP-1,TIMP-2,matrix metalloproteinase(MMP)-9,MMP-2,intercellular adhesion molecule-1(ICAM-1),transforming growth factor?1(TGF-?1),collagenⅢand collagenⅣwere detected by Western blot.The activities of gelatinases and TIMP-1 were examined by gelatin zymography and reverse zymography respectively.Results Focal renal fibrosis was found in two genotypes with aging.At the age of 24 months,compared with wild type,in kidneys of transgenic type,the expressions and activities of gelatinases were dowregulated (MMP-2:2.08?0.20 vs.3.39?0.43;MMP-9:4.02?0.82 vs.6.72?1.40,all P＜0.05);the expressions of collagenⅢ,collagenⅣ,ICAM-1,and TGF-?1 were upragulated(0.72+0.11 vs.0.57?0.09;0.84?0.13 vs.0.6?0.11,0.72?0.12 vs.0.53?0.07; 0.69?0.12 vs.0.45?0.09,all P＜0.05),and the numbers of F4/80 positive cells were increased (18.8?4.4 vs.12.7?3.6,P＜0.05)with the upregulated expression and activity of TIMP-1(1.10?0.18 vs.0.62?0.09;50.75?7.25 vs.20.64?3.50,P＜0.05).Conclusions TIMP-1 could promote age-related renal fibrosis through enhancing inflammation reaction by ICAM-1 upregulation.

Antineoplastic Agents, Phytogenic ; therapeutic use ; Colorectal Neoplasms ; drug therapy ; pathology ; Ginsenosides ; therapeutic use ; Humans ; Lymph Nodes ; pathology ; Lymphatic Metastasis ; prevention & control

Cooperation hydrogen production was carried out using Rhodopseudomonas sp. DT and Enterobacter aerogenes. The effects of the initial ratio of Rhodopseudomonas sp. DT and E. aerogenes, culture temperature, and carbon source on the cooperation hydrogen production were investigated. The results suggested that cooperation hydrogen production rate was highly affected by the initial ratio of Rhodopseudomonas sp. DT and E. aerogenes. The mixed bacteria of Rhodopseudomonas sp. DT and E. aerogenes with 1:1 initial ratio benefited to the cooperation hydrogen production, which led the hydrogen production rate and duration of gas production to 3.1 mol H2/mol glucose and 81 h, respectively. The pH dynamics analysis of culture medium further discovered that the pH of the mixed bacteria with 1:1 initial ratio changed from 6 to 7 smaller than other conditions, which was probably fitted to produce hydrogen. Furthermore, the mixed bacteria with 1:1 initial ratio had the higher hydrogen production efficiency at temperatures of 28?C and 37?C than at 20?C, and without any hydrogen production at temperature of 50?C. The carbon sources of glucose, succinate acid, malic acid could be used to produce hydrogen by the mixed bacteria. Even the soluble starch, unused by Rhodopseudomonas sp. DT, was also decomposed by the mixed bacteria to produce hydrogen with the conversion efficiency of 8.22%. The glucose was the optimal carbon resource, and the conversion efficiency could reach to 36.11%. The results, further, implied that the cooperation hydrogen production could enlarge the use of the carbon sources.

Humans ; Genetic Markers ; Family ; DNA Fingerprinting ; Microsatellite Repeats/genetics*

BACKGROUNDTissue inhibitor of matrix metalloproteinase-1 (TIMP-1) is related to the aging of many organs, but few data are available on the change of TIMP-1 in liver aging. The purpose of this study was to investigate the expression and role of TIMP-1, matrix metalloproteinase-2 (MMP-2) and MMP-9 in the process of natural aging in the livers of normal and transgenic mice, and to detect the effects of TIMP-1 on oxidative level and anti-oxidative ability of the livers of transgenic young mice.

METHODSNormal and transgenic mice were divided into 3 groups according to their age: 3-month-old group (n = 5), 12-month-old group (n = 5) and 24-month-old group (n = 5). Histopathological changes of the liver were observed after HE and Masson staining. The messenger RNA (mRNA) levels of TIMP-1, MMP-2 and MMP-9 were determined by semi-quantitative reverse transcriptional polymerase chain reaction; protein expression was measured by Western blot in the livers of normal and transgenic mice of various ages. Changes in levels of superoxide dismutase (SOD), monoamine oxidase (MAO), malondialdehyde (MDA) as well as oxidative and anti-oxidative ability were measured.

RESULTSHistologically, more fatty degeneration and collagen deposition were found in the aging livers of transgenic mice than in those of the normal mice as their age of months increased. The mRNA and protein expressions of TIMP-1 were significantly high in the oldest animals. The histopathological changes, mRNA and protein expressions of TIMP-1 increased significantly in the liver of transgenic mice as compared with normal mice. The expression of MMP-2 and MMP-9 showed a minor change in the process of aging. Liver change and collagen deposition were not observed in young mice, but the activity of SOD decreased (P < 0.05), and the activity of MAO (P < 0.01) and the content of MDA increased in the liver of transgenic mice (P < 0.01).

CONCLUSIONSThe expression of TIMP-1 is significantly high in the liver of transgenic mouse in the process of aging, indicating that the oxidative level increases and the anti-oxidative ability decreases in the liver of transgenic mouse. TIMP-1 plays an important role in the process of liver aging.

Aging ; metabolism ; Animals ; Female ; Liver ; metabolism ; pathology ; Male ; Matrix Metalloproteinase 2 ; analysis ; genetics ; Matrix Metalloproteinase 9 ; analysis ; genetics ; Mice ; Mice, Transgenic ; Monoamine Oxidase ; analysis ; RNA, Messenger ; analysis ; Reactive Oxygen Species ; metabolism ; Superoxide Dismutase ; metabolism ; Tissue Inhibitor of Metalloproteinase-1 ; analysis ; genetics

OBJECTIVETo discuss the perioperative management of hemophiliacs A with orthopaedic complications.

METHODSTo regulate the injection of factor VIII concentrate in peroperative period by testing the level of factor VIII:C in 27 cases. The lever of factor VIII:C was improved to 30% - 50% at the day before the operation. To the severe patients, it was maintained at 58.5% - 89.3% during the operation and at 47.0% - 78.4% in postoperation. While to the gentle, it was maintained at 38.5% - 52.5% during the operation and at 29.2% - 52.3% in postoperation. The individualized surgical procedures were carried out, such as arthrocentesis, open knee synovectomy or arthroscopic synovectomy, evacuation or curettage of haematoma, debridements, internal fixation.

RESULTSAll patients were cured in 14 - 105 days by regulating the injection of factor VIII during the peroperative period. The usage of factor VIII was 1 200 - 70 250 IU.

CONCLUSIONWhile the hemophiliacs have orthopaedic complications, it is necessary to promise the factor VIII:C being maintained at the lever of hemostasis during the peroperative period. The hemophiliacs are endurable to the operation.

Adolescent ; Adult ; Factor VIII ; administration & dosage ; Fractures, Bone ; complications ; surgery ; Hemarthrosis ; etiology ; surgery ; Hematoma ; etiology ; surgery ; Hemophilia A ; blood ; complications ; drug therapy ; Humans ; Male ; Perioperative Care ; Postoperative Complications ; blood

To develop an analytic method for qualitative and quantitative analysis of dodecatetraenamides A, B in 42 samples of two official species of Asari Radix et Rhizoma( ARR) (37 samples of Asarum heterotropoides var. mandshuricum with different collection time and 5 samples of Asarum sieboldiivar. seoulense). The HPLC-IT-TOF-MS/MS methods for the qualitative and UPLC-PDA methods for the quantitative analysis were established. Dodecatetraenamides A, B were identified by comparing the retention time, UV absorption spectrum and quasi-molecular ion peak [ M + H]+ with the reference compound using HPLC-IT-TOF-MS/MS. The content of dodecatetraenamides A and B in ARR were determined by UPLC-PDA. The separation was successfully carried out on a ACQUITY UPLC BEH C18 (2.1 mm x 100 mm, 1.7 µm) column eluted with mobile phases of water (A) and acetonitrile (B) in gradient program (0-3 min, 35% B; 3-5 min, 35%-36% B; 5-6 min, 36%-43% B; 6 min-11 min 43% B; 11-12 min, 43%-100% B). The column temperature was 45 °C, and the detection wavelength was set at 254 nm. The flow rate was 0.6 mL · min(-1). On one level mass spectrometry scanning, the results showed that the quasi-molecular ion [M + H] + of both dodecatetraenamides A and B were m/z 248.20. The quantitative method with UPLC-PDA has made the baseline separation of the constituents, which were reported as mixtures in the most literatures. The average recovery of dodecatetraenamides A and B were 97.90% and 99.86%, the relative standard deviation were 0.4% and 1.1%, respectively. The contents of dodecatetraenamides A, B in all ARR samples was in the range of 0.11-3.89 and 0.24-6.65 mg · g(-1). Their contents reduced with the extension of storage time. Compared with the samples of 2013, the average content of the two constituents in the samples collected in year 2002-2003 reduced 34% and 36%, respectively (P < 0.05). Compared the A. sieboldii var. seoulense and A. heterotropoides var. mandshuricum with the same collective time and production area, the average contents of the two constituents in latter were up to (1.59 ± 0.75) mg · g(-1) and (2.90 ± 1.17) mg · g(-1), respectively, significantly higher than that in A. sieboldii var. seoulense (dodecatetraenamide A were (0.78 ± 0.52) mg · g(-1), dodecatetraenamide B were (1.69 ± 0.83) mg · g(-1)) (P < 0.05). The content of the dodecatetraenamide A in overground part was in the range of 0.11-0.33 mg · g(-1), dodecatetraenamide B was 0. 24-0.60 mg · g(-1), which were much lower than that of the underground part of ARR (dodecatetraenamide A was in the range of 0.73-3.89 mg · g(-1), dodecatetraenamide B was 2.11-6.24 mg · g(-1)). The method was certified to be simple, accurate and reliable and could be used for qualitative and quantitative analysis of dodecatetraenamide A and B in different species of ARR, also can be used for the comprehensive quality control of traditional Chinese medicine, Asari Radix et Rhizoma.
Amides ; chemistry ; Asarum ; chemistry ; Chromatography, High Pressure Liquid ; Drugs, Chinese Herbal ; chemistry ; isolation & purification ; Mass Spectrometry ; Molecular Structure ; Rhizome ; chemistry