Objective To explore the efficacy and side effect of CAG (G-CSF, aclarubicin and cytarabine) priming chemotherapy for patients with acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). Methods 54 patients with AML at diagnosis and relapse or MDS were'enrolled for the initial treatment with CAG regimen. Patients who have achieved complete remission (CR) were treated with various regimens. Results The total effective rate was 72.2 %, complete remission rate was 48.1% and partial remission rate was 24.1%. The incidence of granulocyte deficiency was 40.7 %(22/54). The severe infection rate was 24.1%(13/54). One case died of function damage in liver. The study includes 36 patients below 60 years, 18 patients above 60 years, and overall effective cases are 28 (77.8 %), 11 (61.1%),respectively. There was significant difference (P ＜0.05). Conclusion CAG regimen is effective and well tolerated in remission for AML and MDS-RAEB.

Calcaneus ; injuries ; surgery ; Fracture Fixation, Internal ; Fractures, Bone ; surgery ; Humans

Aged ; Bronchogenic Cyst ; complications ; Female ; Humans ; Infection ; complications ; Mediastinal Cyst ; complications

BACKGROUND:Breast cancer stem cel s have a greater impact on the occurrence and metastasis of breast cancer. Under simulated tumor microenvironment, we can better analyze the proliferation and differentiation of breast cancer stem cel s. OBJECTIVE:To explore the tumor microenvironment effect on the differentiation of breast cancer stem cel s. METHODS:Breast cancer cel s and MCF-7 cel s were primarily cultured in fibroblast supernatant and serum-free PCM-2 medium, and formation of breast cancer cel s microspheres was observed. Proliferative ability of breast cancer cel s was detected using MTT colorimetry, and the surface markers of breast cancer stem cel s and epithelial-mesenchymal transition markers were measured using immunocytochemistry and RT-PCR methods. RESULTS AND CONCLUSION:The diameter of primary cel microspheres was larger in the serum-free PCM-2 medium than in the fibroblast supernatant, but the culture speed was faster in the fibroblast supernatant than the serum-free PCM-2 medium. At 3 days of primary culture, the expression of ALDH1 in primary cel s was greatly higher in the serum-free PCM-2 medium than in the fibroblast supernatant. However, the expressions of E-cadherin and vimentin were up-regulated in the fibroblast supernatant than in the serum-free PCM-2 medium. In addition, the expressions of E-cadherin and vimentin in MCF-7 cel s cultured in the fibroblast supernatant were up-regulated, while the expressions of ALDH1 and Oct-4 were downregulated. These findings indicate that the tumor environment has some certain effects on the growth and differentiation of breast cancer stem cel s, and some cytokines secreted from fibroblast supernatant can promote the proliferation and differentiation of breast cancer stem cel microspheres to some extent.

Objective: To study the chemical constituents of Potentilla multifida L. Methods: Chemical constituents were isolated by the repeated silica gel chromatography and Sephadex LH 20, and their structures were identified by the spectral analysis. Results: Five compounds were obtained as follows: 3?,24 dihydroxyl urs 12 ene (1), ursolic acid (2), euscaphic acid (3), tormentic acid (4), and epihedaragenin (5). Conclusion: Five compounds were isolated from this plant for the first time. Compounds 1 and 5 were isolated from this genus for the first time. Compound 1 was a new natural product.

Animals ; Animals, Newborn ; Hippocampus ; metabolism ; Hypoxia, Brain ; metabolism ; Ischemic Preconditioning ; methods ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Rats ; Rats, Sprague-Dawley ; bcl-2-Associated X Protein ; metabolism

Acute Disease ; Humans ; Paraquat ; poisoning

Objective To study the differences of chromosomal structure among Yersinia pestis strains isolated from China,and to investigate the reasons of chromosomal rearrangement events occurred in Yersinia pestis as well as the possibility of strain identification and phylogenetic analysis based on the chromosomal rearrangement features.Methods According to the genome sequence data downloaded from web of National Center for Biotechnology Information (http://www.ncbi.nlm.nih.gov/genome),alignment of all the coding sequences (CDSs) among five strains(American strain CO92 as reference and other four completely sequenced strains from Inner Mongolia,Jianchuan of Yunnan,Yulong of Yunnan,Naqu of Tibet in China named 91001,D182038,D106004 and Z176003 as comparison strains) was performed,and then the chromosome of Yersinia pestis was divided into several large DNA segments (named chromosomal plate in the text) according to the similarity of CDSs.Plate arrangement patterns in each strain' s chromosome and gene content of breakpoint regions were determined.Finally,genetic relationships among Yersinia pestis strains were analyzed on the basis of rearrangement diversity from paired-comparison.Results Yersinia pestis chromosomes of strains CO92,D182038,D106004,91001 were composed of 44 relatively independent plates,except strain Z176003.Gene order was very stable within each plate,while it was movable between the plates.Comparing with the reference strain CO92,13 rearrangement events occurred in the chromosomes of both strain D182038 and strain D106004,and 14 rearrangement events involved in Z176003,while 37 rearrangement events occurred in 91001.Paired-comparison data showed that only 8 plates order differences were existed between D106004 and Z176003.Forty-three breakpoint regions were identified on the chromosome of strain CO92,and 39 of them contained insertion sequences,and 25 of them were IS100.Conclusions Yersinia pestis genome represents a high degree of genetic flux,and chromosomal structures of strains are significantly different from each other.Chromosomal rearrangement events is closely related to the large number of insertion sequences in the Yersinia pestis chromosome.Rearrangement diversity among Yersinia pestis strains could reflect their genetic relationships.

In this experiment we used the model of the orthotopic liver transplantation with three cuff technique in rats.In treated group,coenzyme Q_(10) was injected intravenously into donor rats before donor hepatectomy.At the 4th hour after transplant,the activity of superoxide dismu- tase (SOD) and the level of lipid peroxidation (LPO) both in the blood and in the liver tissue were measured,meanwhile,the specimens of the grafted liver tissue were sent for microscope and elec- tromicroscope studies.The results showed:(1) The activity of SOD in treated group were higher than that in control group (P

Objective To observe visual field outcome and refractive status of patients with retinopathy of prematurity (ROP) treated by laser photocoagulation.Method The data of 39 ROP patients (73 eyes) who received laser photocoagulation were retrospectively analyzed and compared with 13 normal control subjects (25 eyes) whose age and sex were matched with ROP group.There were 24 males (45 eyes) and 15 females (28 eyes) in ROP group,with an average age of (7.0± 1.28) years.The first laser treatment was carried out at postnatal age (PA) of (38.74±3.82) weeks,the birth weight (BW) of (1402.33 ±369.61) g and the number of laser burns was (517.86 ± 277.40).The control group included 7 females (13 eyes) and 6 males (12 eyes),with an average age of (7.17 ± 0.96) years.The age (t=0.691) and gender (x2=1.425) were comparable between the two groups (P=0.491,0.233).The data of patients and controls were retrospectively analyzed including best corrected visual acuity,refractive examination,automated perimetry test.The differences of the mean deviation (MD) of visual field and the spherical equivalent (SE) between these two groups were comparatively observed.ROP patients were divided into no VF loss group (MD≤2 dB) and VF loss group (MD＞2 dB),mild VF loss group (MD ≤ 6 dB) and moderate VF loss group (MD ＞6 dB) according to the results of automated perimetry test,the differences of gestational age (GA),PA,BW,number of laser burns and SE between these groups were comparatively observed.Results The MD in ROP group and control group were 4.87±5.12 dB and 1.27 ± 3.34 dB,respectively;the difference between the two groups was statistically significant (t=-4.01,P＜ 0.001).The subgroup analysis showed that BW,number of laser burns,and SE were significantly different between no VF loss group and VF loss group (t=2.074,-1.996,-2.162;P=0.042,0.026,0.034);while the GA was not significantly different between these two groups (t=1.973,P=0.052).The difference of PA was not statistical significant different between mild VF loss group and moderate VF loss group (t=2.03,P=0.051) and SE was significantly different between the above two groups (t=3.283,P=0.002).For refractive outcomes,the BW and ROP stage correlated with SE significantly (r=-0.304,-0.387;P=0.015,0.002).The mean BCVA in ROP group was 0.84±0.23,and 59 eyes (91.2％) with BCVA better than 0.5.Conclusion Laser treatment for ROP tends to have less effect on long term refractive status and VF loss,with good visual outcome.