IL-2 gene was introduced into human erythroleukemic cell line K562 by retroviral vector. After transduction for eighteen days, flow microfluorometric analysis for DNA distribution of both K562/neo and K562/IL-2 cells indicated that transduced cells were accumulated in a state of G2M arrest. Thirty days later, the number of G2+M in K562/neo cells decreased, but proportion of G0/G1 in K562/IL-2 cells was still lower and G2+M was higher than that of nontransduced cells. The proliferative activity assay by MTT method demonstrated that the proliferation of K562/IL-2 was slow following four day culture. The index of mitosis was decreased. The results of light microscopical studies showed many giant and multinucleate giant cells with even more than twenty nuclei in each cell. It was possible that the formation of multinucleate giant cells associated with repeated endomitosis in a single cell. Further analysis of morphometry confirmed that the size of IL-2 gene modified K562 cells was increased. The ratio of giant cells was higher than that of nontransduced K562 cells. We suggested that I1-2 gene transduction might have some regulation effects on proliferative activity of K562 cells. IL-2 gene modified K562 cells might be blocked at a stage of G2.

AIM: To observe the differences in central cornea thickness, anterior chamber depth, corneal anterior curvature and corneal posterior curvature between the Uygur and the Han nationality college emmetropia students, and analyze the relationship of corneal thickness and corneal curvature.
METHODS: More than 500 students in grade one in Xinjiang Medical University were underwent screening, 56 emmetropia eyes in Han nationality students and 51 in Uygur students were selected. Sirius corneal topography was applied to the measurement.
RESULTS: Uygur and the Han nationality college emmetropia students central cornea thickness ( Uygur:0.53±0. 03mm, Han: 0. 54±0. 03mm), anterior chamber depth ( Uygur: 2. 91±0. 26mm, Han: 3. 14±0. 25mm), corneal posterior curvature K2 ( Uygur: -6. 30±0. 23D, Han: -6. 38±0. 28D) had significant difference (P<0. 05). Corneal anterior curvature ( K1, K2 ) before and corneal posterior curvature K1 there was no significant difference (P>0. 05). Han had no significant relationship in corneal thickness and corneal anterior curvature ( r<0 ) , or in corneal posterior curvature ( r < 1 ) . Uygur has no significant relationship in corneal thickness and corneal anterior curvature (r<0), or in corneal posterior curvature (r<1).
CONCLUSION: There are significant differences between the Uygur and the Han nationality college emmetropia students in cornea thickness, anterior chamber depth and corneal posterior curvature K2. There is no significant relationship between corneal thickness and corneal curvature in Uygur and the Han nationality college students.

There are many deficiencies in forensic traumatic molecular markers detected by the techniques of traditional immunohistology and molecular biology, because these markers are isolated and obscure of the mechanism of interaction. The imaging mass spectrometry (IMS) is more suitable for the forensic molecular markers using function of screening, analysis and graphical representation. In this paper, the techniques and the latest research in screening and identification of typical molecular markers by IMS based on matrix-assisted laser adsorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) are reviewed. And its application values in forensic injury are discussed.
Biomarkers/analysis* ; Diagnostic Imaging ; Molecular Biology ; Molecular Weight ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/methods*

MicroRNA(miRNA) is a class of non-coding RNA that plays an important role in gene expression and controlling. In recent years,the role of miRNA in the development of the disease has aroused great interest. Abnormal osteoclastogenesis and persistent inflammatory response induced by wear particles or osteoblast differentiation and maturation is the main cause of aseptic loosening in joint replacements. New researches shows that persistent inflammatory response, osteoclastogenesis and osteoblast differentiation are closely associated with miRNA, suggesting that there are certain relations between miRNA and aseptic loosening of prostheses. Additionally, the alteration of the expression levels of some miRNA may be curative for aseptic loosening. With the findings of the new miRNA targets, the important role of miRNA is further confirmed.
Animals ; Arthroplasty, Replacement ; Cell Differentiation ; Humans ; Joint Diseases ; genetics ; metabolism ; surgery ; MicroRNAs ; genetics ; metabolism ; Osteoblasts ; cytology ; metabolism ; Prostheses and Implants

Acupuncture Therapy ; Adult ; Aged ; Combined Modality Therapy ; Female ; Humans ; Male ; Middle Aged ; Moxibustion ; Punctures ; Tennis Elbow ; therapy ; Treatment Outcome

Adult ; Arsenic Poisoning ; etiology ; Female ; Humans ; Male ; Middle Aged ; Organotin Compounds ; poisoning ; Water Pollution ; Young Adult

Objective To observe the effect of signal transduction pathway of NF-κB on tubular cell apoptosis in ischemia-reperfusion induced acute kidney injury (AKI) in mice.Methods Eighteen C57B/6 mice were randomly (random number) divided into three groups,namely control group,AKI group,and pyrrolidine dithiocarbamate (PDTC) group.AKI model of mouse was made by occlusion of bilateral renal pedicles with microvascular clamps for 45 minutes,and intraperitoneal injection of PDTC (50 mg/kg) was given immediately after modeling in mice of PDTC group.Forty-eight hours after modeling,kidney pathological changes,serum creatinine (SCr) and blood urea nitrogen (BUN) were examined,and renal tissue NF-κB,TNFR,Bcl-2 and caspase-3 levels were detected by using immunohistochemistry,and tubular cell apoptosis was observed by terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling assay (TUNEL).Results (1) The pathological Pallers score of renal damage,blood urea nitrogen and serum creatinine levels in PDTC group were significantly lower than those in AKI group [(2.83 ± 0.41)vs.(4.50± 0.55),P=0.000; (61.65 ±3.06) mmol/L vs.(77.78 ±5.82)mmol/L,P=0.000and (74.33 ± 9.83) μmol/L vs.(152.00 ± 16.55) μmol/L,P =0.000,respectively].(2) The level of NF-κB in renal tissue homogenates in PDTC group was significantly lower than that in AKI group [(20.33± 2.34) ％ vs.(35.83 ± 3.06) ％,P =0.000].(3) The apoptotic index of renal tubular cells in PDTC group was significantly lower than that in AKI group [(16.67 ± 1.15) ％ vs.(28.00 ±2.01) ％,P =0.001].(4) The levels of caspase-3 and TNFR1 in renal tissue homogenates in PDTC group were significantly lower than those in AKI group [(7.00 ± 1.26) vs.(11.00 ± 1.26),P =0.000 and (5.55 ± 0.82) vs.(9.75 ± 0.76),P =0.000],and Bcl-2 level in PDTC group was significantly higher than that in AKI group [(10.50± 1.38)vs.(1.83 ±0.98),P=0.000].Conclusions NF-κB activates renal tubular cell apoptosis in acute kidney injury induced in mice after ischemia-reperfusion.Blockade of NF-κB signal transduction pathway may lessen the apoptosis of renal tubular cells,leading to renal function less compromised.

The intraspecies quorum sensing system of Streptococcus mutans is involved with com genes family.ComE is a kind of response regulator and act as a promoter to the quorum sensing genes.S.mutans comE mutant strain IFD140?comE was constructed using the inframe-deletion system via twice homologous recombination.In current genetic studies of S.mutans,insertion duplication and allelic exchange mutagenesis techniques routinely create polar effects to downstream genes.In-frame deletions are essentially free of these polar effects because the mutation does not introduce any genetic markers.By PCR,sequencing and RT-PCR,it was confirmed that IFD140?comE has only 717bp deleted within the comE gene and the transcription of the downstream gene comD was not interfered.The research of the morphological characteristics indicated that IFD140?comE formed clumps and cells accumulated at the bottom of the glass tubes and light-microscopic observations displayed that the mutant strain formed significantly longer chains compared to those formed by the wild strain.The successfully construction of IFD140?comE lay a foundation for further quorum sensing research.

Objective To investigate the clinical significance in diagnosis and prognostic judgments of acute myelocytic leukemia with combined detection of morphology ,peripheral blood and immune typing of bone marrow cells .Methods Microscopic examina‐tion of bone marrow cell morphology ,automatic blood cell analyzer detection of peripheral blood parameter and flow cytometry anal‐ysis of immune markers of leukemia cells ,all these datas were analyzed statistically .Results Peripheral blood cell analysis showed that instruments may indicate the presence of abnormal or naive cells in about 85% patients ,different kinds of leukemia had signifi‐cant difference in total leukocyte count (majority higher in M1 - 2 ,M5 ;majority lower in M3) ;while anemia and thrombocytopenia were observed in most patients ,but the degree was different ;M1 - 2 and M5 can not be identified by classification of leukocyte by automatic blood cell analyzer ,CD7 ,CD10 and CD2 can cross express in myeloid leukemia ,which have a prompt effect with treatment and prognosis .Conclusion Detection of peripheral blood parameters has an important role in early screening ,differential diagnosis and prognosis judgment of leukemia ,immunological markers detection is the powerful supplement and support for leukemia diagno‐sis and typing ,sensitive markers have close contact with prognosis ,which significantly improves the effect of the diagnosis and treatment of leukemia .