OBJECTIVETo explore the effect of Tanshinone II A on severe acute pancreatitis (SAP) lung injury (ALI) rats and its possible mechanism.

METHODSSD rats were injected with sodium taurocholate to induce SAP group, and then intervened with sodium tanshinone II A sulfonate ( STS group). Simultaneously a sham-operation group (SO group) was set up. There were 24 rats in each group. The survival state and wet-to-dry weight ratio of lung tissues were observed. Activities of myeloperoxidase (MPO) in lung were determined by MPO reagent kit. Pathologic changes of lung tissues were determined by Hofbuaer method. Expression levels of three cytokines, TNF-alpha, IL-1beta, and intercellular cell adhesion molecule-1 (ICAM-1) were detected by ELISA.

RESULTSThe survival state of rats in the SAP group was deteriorated. The wet-to-dry weight ratio, MPO activities, pathologic changes in lung tissues, and expression levels of TNF-alpha, IL-1beta, and ICAM-1 increased significantly more in the SAP group than in the SO group (P < 0.05). Compared with those in the SAP group, the survival state of rats in the STS group was improved; the wet-to-dry weight ratio, MPO activities, pathologic changes in lung tissues, and expression levels of TNF-alpha, IL-1beta, and ICAM-1 obviously decreased in the STS group (P < 0.05).

CONCLUSIONTanshinone II A had remarkable effect on SPA LI rats, which might be associated with changing cytokines levels and attenuating infiltration of lung inflammatory cells.

Acute Lung Injury ; drug therapy ; Animals ; Cytokines ; metabolism ; Diterpenes, Abietane ; pharmacology ; therapeutic use ; Intercellular Adhesion Molecule-1 ; Interleukin-1beta ; Lung ; Pancreatitis ; drug therapy ; Peroxidase ; Rats ; Rats, Sprague-Dawley ; Taurocholic Acid ; Tumor Necrosis Factor-alpha

Objective To clone and compare RNase HIIa and RNase HIIb of Chlamydia pneumoniae AR39(CpRNaseHIIa and CpRNaseHIIb). Methods Genes of CpRNase HIIs were amplified with the designed primers.Then,the recombinant plasmids were constructed,and CpRNase HIIs were expressed and purified with pET expression system.The 5′-32P-labeled RNA/DNA substrate and DNA with oligoribonucleotides substrates were prepared to identify characterization of CpRNase HIIs. Results Ribonuclease H activity of both CpRNase HIIa and CpRNase HIIb could cleave oligoribonucleotides strand,generating break with 3′-OH and 5′-phosphate ends.The results showed that there was different biochemical characterization between them. Conclusion CpRNase HIIa and CpRNase HIIb have different functions in C.pneumoniae.

AIM: To establish HPLC for determination of 2,3,5,4′tetrahydroxystilbene-?-O-?-D-glucoside in Radix polygoni multiflori preparata. METHODS: The column was diamonsil C_(18)(5 ?m,4.6 mm?250 mm).The mobile phase was CH_3CN-CH_3OH-H_2O(10∶20∶70) and ?=320 nm.The flow rate was 1.5 ml/min. RESULTS: The linearity was in the range of 0.0253-0.3542 ?g.The average recovery and RSD were 99.34% and 0.49%,respectively. CONCLUSION: The method is simple,precise and reproduciable and can be used for determination of 2,3,5,4′-tetrahydroxystilbene-?-O-?-D-glucoside in Radix polygoni multiflori preparata effectively.

Objective To study the effect of Thy-1.1 stem cell transplantation on endothelial hyperplasia and restenosis.Methods Thirty 4-6 weeks male SD rats were sacrificed to obtain the Thy-1.1 stem cells.Carotid artery were injured by ballon in sixty female SD rat's were randomized to receive stem cell transplantation(5?10~6 Thy-1.1,n=30)or saline approach(n=30).About 5?10~6 Thy-1.1 stem cells were injected into the injured arter- y after carotid artery injury;while the control rats underwent carotid artery injury and was injected the same amount of saline.The animals were sacrificed,3,7,14,21 and 28 days after balloon denudation.The samples of carotid artery were harvested for pathological examination,RT-PCR and in situ hyhridzation(ISH)were used to detect the transplanted cells in the injured artery.Results The intimal thickness was thinner in stem cell transplantation group(I/M,Stem cell transplantation group:2.06?0.28 vs control group 2.42?0.19,P

Allergy and Immunology ; Congresses as Topic ; Humans

Brain ; diagnostic imaging ; pathology ; Cerebral Palsy ; diagnosis ; pathology ; Cognition Disorders ; diagnosis ; pathology ; Early Diagnosis ; Humans ; Infant, Newborn ; Infant, Premature ; Infant, Premature, Diseases ; diagnosis ; pathology ; Language Disorders ; diagnosis ; pathology ; Leukomalacia, Periventricular ; complications ; diagnosis ; pathology ; Magnetic Resonance Imaging ; methods ; Prognosis ; Radiography ; Severity of Illness Index

The development of the murine embryonic hematopoietic system occurs in spatially and temporally distinct waves, which it is described as three waves so far-primitive hematopoiesis, bipotential erythroid-myeloid progenitors (EMPs) generation and long-lived transplantable hematopoietic stem cells (HSCs) maturation from their precursors and differentiation toward all the adult lineages. The latest point is that HSC-independent hematopoietic lineages are produced in the primitive wave and definitive progenitor wave in the early mammalian embryo, such as primitive erythrocytes or EMPs. The HSC-dependent phase of hematopoietic development produces all the adult lineages derived from HSCs. In this review, the recent studies on the development of hematopoietic cells and HSCs in the yolk sac and aorta-gonad-mesonephron region (AGM) region at cellular and molecular level will be summarized to provide an integrated model of developmental hematopoiesis, although multiple hematopoietic sites are involved in embryonic hematopoiesis. It may offer new insights into the characteristics and its underlying mechanism of hematopoiesis at the early stage of embryogenesis.

24 h(all P

The perivascular space is formed by the pia mater around the blood vessels and participates in the fluid exchange and waste clearance in the brain. The enlarged perivascular space (EPVS) indicates the disorder of brain clearance mechanism, which is closely related to the occurrence and development of a variety of clinical diseases. In recent years, there are a lot of studies on the pathogenesis and influencing factors of EPVS. This article reviews its anatomy, neuroimaging, pathogenesis, and risk factors.

Background Rare studies on the effect of statin on early stage of atherosclerosis have been repor- ted.Oxidative stress induced endothelial dysfunction may be the initiative factor for the development of atheroscle- rotic plague.Objective To investigate the mechanisms by which simvastatin,prevents atheroselerosis independ- ently of its lipid-lowering effect in Apolipoprotein E deficient mice.Methods Twenty-four 6 week old male apoE- deficient mice were randomly to receive placebo or simvastatin 5 mg/(kg?d)by gavage for 4 weeks.Total choles- terol(TC),super oxide dismutase(SOD),malondialdehyde(MDA)and serum nitric oxide(NO)were measured by biochemical analysis.Endothelium was observed by HE dyeing.The expression of caveolin-1 in aortic wall was detected by immunohistochemistry.Results There was no significant difference in serum TC between control and simvastatin treatment groups.Simvastatin caused less damaged endothelium(33.33% vs control's:75%,P