Objective To determine the optimal time for intravenous injection of bone marrow mesenchymal stem cells(BMSCs)by observing the effects of inflammation after spinal cord injury on the survival and immigration of BMSCs injected intravenously.Methods Forty SD rats were randomized into 1 non-injury group and 7 spinal cord injury(SCI)groups in which the injured spinal cords were harvested at 0 h, 6 h, 12 h, 24 h, 3d, 5 d, and 7 d respectively.Hematoxylin and eosin(HE)staining was used to e-valuate the histopathologic changes.Myoleperoxidase(MPO)activity was measured to study the duration of polymorphonuclear leukocyte(PMNL)infiltration in the spinal cord after injury.Another 40 SD rats were also randomly divided into 1 non-injury group and 7 transplantation groups in which intravenous injection of BMSCs was performed at 0 h, 6 h, 12 h, 24 h, 3d, 5 d, and 7 d after SCI.The survival counts and immigration distance of BMSCs in the spinal cord in all the groups were measured.Results The PMNL infiltration into the injured spinal cord and the MPO activity started from 6 h after SCI.There were a large number of infiltrating PMNL in the spinal cord and the MPO activity reached its peak value at 24 h.The infiltrating PMNL in the injured spinal cord began to decrease and the MPO activity began to weaken from 3 d.Proliferation of glial cells and formation of empty holes in the spinal cord started from 5 d.The survival counts of BMSCs were smaller but the immigration distance of BMSCs was longer in the 0 h, 6 h, 12 h, and 24 h transplantation groups.The survival counts of BMSCs were larger and the immigration distance of BMSCs was longer in the 3 d transplantation group.The survival counts of BMSCs were smaller but the immigration distance of BMSCs was shorter in the 5 d and 7 d transplantation groups.Conclusion The optimal time for intravenous injection of BMSCs may be 3 days after SCI.

Objective To investigate the feasibility of transplanting bone marrow stromal cells (BMSCs) in the injured spinal cord for differentiation into functional oligodendrocytes in rats. Methods The ultra-structure of transplanted BMSCs in the injured rat spinal cord was observed at 1,3,5 weeks after transplantation by immuno-electron microscopy and low temperature embedding.The expressions of myelin basic protein (MBP) and proteolipid protein (PLP) in the transplanted BMSCs in the injured spinal cord were observed at 1,3,5 weeks after transplantation by immunofluorescence staining and laser confocal scanningmicroscopy. Results The organelles in the BMSCs migrated into the white matter of the spinal cord anddeveloped at 1 week after transplantation,showing the ultra-structure features of oligodendrocytes.The BMSCs migrating into the white matter of the spinal cord showed mature ultra-structure features of oligodendrocytes and formed myelin-like structures at 3 and 5 weeks after transplantation.The BMSCs migrating into the white matter of the spinal cord expressed the MBP and PLP at one week after transplantation,and continued to express the MBP and PLP at 3 and 5 weeks after transplantation. Conclusion The BMSCs transplanted into the injured spinal cord nay partly differentiate into functional oligodendrocytes.

To investigate the mechanism of inhibitory effect of a novel bFGF antagonist peptide isolated from the phage display random heptapeptide library on cell proliferation induced by basic fibroblast growth factor. The effect of P7 on cell morphology was observed under an inverted microscope. Flow cytometry was applied to analyze the effect of P7 on cell cycle progress of bFGF-stimulated cells. The effect of P7 on bFGF-induced activation of MEK and Erk1/2 in MAPK pathway was detected by Western blotting. The results showed that no significant cell morphology change was observed in the range of detected concentrations of P7. Cell cycle analysis showed that P7 decreased S-phase cell population and arrested cell cycle at the G0/G1 phase of bFGF-stimulated cells. The results of MAP kinase activation assay indicated that P7 decreased bFGF-induced MEK and Erk1/2 phosphorylation in a dose-dependent manner. P7 inhibited proliferation of bFGF-stimulated Balb/c 3T3 cells possibly via cell cycle arrest at the G0/G1 phase and down-regulation of signal molecular activation in MAPK pathway.

Objective To discuss the value of multi-slice spiral CT angiography (MSCTA)and digital subtraction angiography (DSA)in lower extremity arteriosclerosis obliterans.Methods MSCTA and DSA of lower extremity arteries were performed in 41 patients with lower extremity arteriosclerosis obliterans sequentially.The interval of these two examinations was no more than 2 weeks.DSA served as the reference standard and compared with MSCTA in terms of grading of stenoocclusive lesions,visualization of collaterals in lower extremity arteries.Results No significant differences of grading of stenoocclusive lesions,visualization of col-laterals were observed between MCTA and DSA in lower extremity arteries.Compared with the results of DSA,the sensitivity,spe-cificity,accuracy,positive and negative predictive value of MSCTA in the detection of arterial stenosis (≥ 50%)were 97.2%, 98.2%,93.8%,94.6%,98.2%,respectively.Conclusion MSCTA shows relatively high sensitivity and specificity in the diagnosis of lower extremity arteriosclerosis obliterans,can provide effective guidance of planning treatment in lower extremity arteriosclerosis obliterans.

Objective To study the risk factors of complications after hepatectomy for intrahepatic stone.Method Clinical data of 363 patients with hepatolithiasis receiving elected hepatic resection in past 4 years in our hospital were analyzed retrospectively.Postoperative complications were recorded.Possible risk factors pertaining to the development of complications were identified using univariate and multivariate analysis.Results the surgical mortality was 0.6%(2/363).Postoperative complications occurred in 110 of 363 patients(30.3%).The morbidity included wound infection/liquafication in 42 cases(11.6%),pleural effusion in 41(11.3%),subphrenic collection in 36 (9.9%),bile leakage in 21(5.8%),intra-abdominal collection/infection in 13(3.6%),gastrointestinal bleeding in 3(0.8%),biliary hemorrhage in 2(0.6%),hepatic function insufficiency in 1 (0.3%).The multivariate logistic regression analysis identified that previous history of biliary surgery (P=0.042,odds ratio[OR]=0.617,95%confidence interval[CI]:0.388 to 0.982)and operative time(P=0.0001,odds ratio[OR]=0.994,95%confidence interval[CI]:0.991 to 0.997)were the independent risk factors for development of complications after hepatoectomy for hepatolithiasis.Conclusion Previous history of biliary duct surgery and operative time are the independent risk factors for development of complications after hepatoectomy for intrahepatic stone.For patients with previous biliary surgery,adequate preoperative preparation,improving operative skills and shortening operative time are critical important to prevent occurrence of complications.

[ ABSTRACT] AIM:To investigate the depressant effect of FK228 combined with rapamycin on the human breast cancer cell line MCF-7 and MDA-MB-435.METHODS:FK228, a new histone deacetylase inhibitor, and rapamycin, the specific inhibitor of the mammalian target of rapamycin ( mTOR) protein, were used in the study.MCF-7 cells and MDA-MB-435 cells were exposed to different concentrations of FK228 and rapamycin.The inhibitory rate of cell growth was de-termined by SRB assay.Combination index ( CI) was used to evaluate the interaction between FK228 and rapamycin.The expression of the apoptotic proteins, cycle proteins and nucleic acid proteins were detected by Western blotting.The cell cycle was analyzed by flow cytometry.RESULTS: Both FK228 and rapamycin showed growth inhibitory effects on the breast cancer cell lines in a time-and dose-dependent manner.CI of the 2 drugs was less than 1 when the inhibitory rate of the cell growth was 50%effective dose (ED50)~ED70, indicating a synergistic effect.The combination therapy of FK228 with rapamycin increased the apoptotic proteins, and induced the down-regulation of phosphorylated Akt and over-expres-sion of caspase-3 compared with a single use of the drugs.The combination therapy of FK228 with rapamycin reduced the cycle proteins, and the cell cycle was arrested in G2/M.The levels of phosphorylated H2AX and acetylated H3 were ob-viously increased after combination therapy.CONCLUSION:The combination therapy of FK228 with rapamycin inhibits the cell proliferation and increases apoptosis with a synergistic effect, which may become a new trend for treating endometri-al cancer.

BACKGROUND: Diabetic wounds are a major clinical challenge, because minor skin wounds can lead to chronic, unhealed ulcers and ultimately result in infection, gangrene, or even amputation. Studies on bone marrow derived mesenchymal stem cells (BMSCs) and a series of growth factors have revealed their many benefits for wound healing and regeneration. Platelet-rich plasma (PRP) may improve the environment for BMSC development and differentiation. However, whether combined use of BMSCs and PRP may be more effective for accelerating diabetic ulcer healing remains unclear. OBJECTIVE: We investigated the efficacy of BMSCs and PRP for the repair of refractory wound healing in a diabetic rat model. METHODS: Forty-eight rats with diabetes mellitus induced by streptozotocin were divided into four groups: treatment with BMSCs plus PRP, BMSCs alone, PRP alone, phosphate buffered saline. The rate of wound closure was quantified. A histopathological study was conducted regarding wound depth and the skin edge at 7, 14, and 28 days after surgery. RESULTS: Wound healing rates were significantly higher in the BMSC plus PRP group than in the other groups. The immunohistochemistry results showed that the expression of platelet/endothelial cell adhesion molecule 1, proliferating cell nuclear antigen, and transforming growth factor-beta1 increased significantly in the BMSC plus PRP group compared to the other treatment groups. On day 7, CD68 expression increased significantly in the wounds of the BMSC plus PRP group, but decreased markedly at day 14 compared to the controls. CONCLUSION: The combination of BMSCs and PRP aids diabetic wound repair and regeneration.
Amputation ; Animals ; Bone Marrow ; Cell Adhesion ; Diabetes Mellitus ; Gangrene ; Immunohistochemistry ; Intercellular Signaling Peptides and Proteins ; Mesenchymal Stromal Cells* ; Models, Animal ; Platelet-Rich Plasma* ; Proliferating Cell Nuclear Antigen ; Rats* ; Regeneration ; Skin ; Streptozocin ; Ulcer ; Wound Healing ; Wounds and Injuries

Livestock husbandry is vital to economy of the Tarim Basin, Xinjiang Autonomous Region, China. However, there have been few surveys of the distribution of ixodid ticks (Acari: Ixodidae) and tick-borne pathogens affecting domestic animals at these locations. In this study, 3,916 adult ixodid ticks infesting domestic animals were collected from 23 sampling sites during 2012-2016. Ticks were identified to species based on morphology, and the identification was confirmed based on mitochondrial 16S and 12S rRNA sequences. Ten tick species belonging to 4 genera were identified, including Rhipicephalus turanicus, Hyalomma anatolicum, Rh. bursa, H. asiaticum asiaticum, and Rh. sanguineus. DNA sequences of Rickettsia spp. (spotted fever group) and Anaplasma spp. were detected in these ticks. Phylogenetic analyses revealed possible existence of undescribed Babesia spp. and Borrelia spp. This study illustrates potential threat to domestic animals and humans from tick-borne pathogens.

Objective To study the Hainan Utstein templates used for cardiac arrest and resuscitation registries to evaluate the epidemiological characteristics and outcomes of the patients with CPR by multi-center study. Methodsccording to the Utstein templates for cardiac arrest and CPR set by International Liaison Committee on resuscitation in 2004, a Hainan Utstein CPR registry chart was designed and a prospective descriptive study was carried out to evaluate the epidemiological characteristics, impact factors and outcomes of the patients with resuscitation attempt in emergency departments of thirteen hospitals in Hainan Island between January 2007 and December 2010.Results Of 1125 patients with cardiac arrest, male accounted for 73. 8％ and female was 26. 2％. The mean ( ± S. D) age of the cardiac arrest patients was 53.9 ± 13. 1 years old.Coronary heart diseases and hypertension were the most common preexisting chronic diseases in the studied patients. The ROSC rate and discharge rates after survival in 1125 patients with CPR were 23. 8％ and 7.4％ respectively. The ROSC rate and discharge rates after survival were 36. 3％ and 11.6％ in the in-hospital cardiac arrest (IHCA) group, respectively whereas 11.5％ and 3. 3％ in out-hospital cardiac arrest (OHCA) group. Of 188 patients with ventricular fibrillation/Pulseless ventricular tachycardia, the ROSC rate and discharge rate after survival were 58.0％and 21.8％,respectively. Of them, 448 (39. 8％ ) of the cardiac arrest patients had underlying cardiac causes, and the ROSC rate and discharge rate after survival were 36. 3％ and 11.5％ respectively in IHCA group whereas 11.6％ and 3. 3％ in OHCA group. The ROSC rate and discharge rate after survival were 69. 8％ and 7. 4％respectively in the tertiary hospitals whereas 30. 2％ and 7. 3％ in the secondary hospitals. Conclusions Patients experienced cardiac arrest were predominantly male. Coronary heart disease and hypertension were the two most common preexisting chronic diseases. The ROSC rate and discharge rate of patients with IHCA were higher than those with OHCA. ROSC rate and discharge rate after survival were higher in the ventriculat fibrillation/Pulseless ventricular tachycardia group than the other cardiac rhythms first witnessed groups. The time delayed of starting CPR after onset of cardiac arrest had a critical impact on survival and discharge rate in both IHCA and OHCA groups.