Objective: To explore the biological properties of keratinocytes from differently-aged healthy human beings. Methods: Keratinocytes from fetus, teenager and middle-aged groups were separated and cultured. The population doubling time (PDT) and cell growth curve in different cells were compared, and the cell cycles were analyzed by flow cytometry. Results: Circled digit one In primary culture of keratinocytes, the adherence time in middle-aged group was longer than that in fetus and teenager groups. However, all cell morphology showed no obvious differences. In subculture of keratinocytes, with donator's age increasing, time of cell adherence prolonged, passage number decreased and differences in cell morphology were obvious. Circled digit two The average PDT of keratinocytes was shorter in fetus group than in teenager and middle-aged groups. But difference in cell growth curve between different passages was not observed. Circled digit three Keratinocytes showed G2/M period in fetus group but G0/G1 period in teenager and middle-aged groups mainly. Conclusion: As age increases, the biological properties of keratinocytes change obviously.

Objective: To explore the biological properties of keratinocytes from differently-aged healthy human beings. Methods: Keratinocytes from fetus, teenager and middle-aged groups were separated and cultured. The population doubling time (PDT) and cell growth curve in different cells were compared, and the cell cycles were analyzed by flow cytometry. Results: Circled digit one In primary culture of keratinocytes, the adherence time in middle-aged group was longer than that in fetus and teenager groups. However, all cell morphology showed no obvious differences. In subculture of keratinocytes, with donator's age increasing, time of cell adherence prolonged, passage number decreased and differences in cell morphology were obvious. Circled digit two The average PDT of keratinocytes was shorter in fetus group than in teenager and middle-aged groups. But difference in cell growth curve between different passages was not observed. Circled digit three Keratinocytes showed G2/M period in fetus group but G0/G1 period in teenager and middle-aged groups mainly. Conclusion: As age increases, the biological properties of keratinocytes change obviously.

This study aims to analyse the value of CODEHOP RT-PCR in the detection of Flavivirus. According to the amino acid sequences of polyproteins of different flaviviruses published in GenBank, a pair of primers was designed using the CODEHOP method. One-step RT-PCR was used to detect Japanese encephalitis virus strain JEV1201, Dengue virus strain JKD001, and yellow fever virus vaccine YV6161. BLAST analysis and phylogenetic analysis were performed after the RT-PCR products of nucleocapsid genes were sequenced. The results showed that this method could amplify Flavivirus specifically, and the size and sequence of the target fragment accorded with the anticipated result. JEV1201 had the highest homology to Japanese encephalitis virus strain YL2009-4/YC2009-3, belonging to the branch of the phylogenetic tree of Japanese encephalitis virus strains. JKD001 had the highest homology to Dengue virus strain DENV-2/ID/1022DN/1975, belonging to the branch of the phylogenetic tree of Dengue virus strains. YV6161 had the highest homology to Yellow fever virus strain 17D, belonging to the branch of the phylogenetic tree of Yellow fever virus strains. In conclusion, the method of CODEHOP RT-PCR can be effectively used to detect, identify, and phylogenetically analyse Flavivirus.
DNA Primers ; genetics ; Flavivirus ; classification ; genetics ; isolation & purification ; Flavivirus Infections ; virology ; Humans ; Molecular Sequence Data ; Phylogeny ; Reverse Transcriptase Polymerase Chain Reaction ; methods ; Viral Nonstructural Proteins ; genetics

Adenocarcinoma, Mucinous ; metabolism ; pathology ; Adult ; Breast Neoplasms ; metabolism ; pathology ; surgery ; Breast Neoplasms, Male ; metabolism ; pathology ; surgery ; Cadherins ; metabolism ; Carcinoma ; metabolism ; pathology ; surgery ; Carcinoma, Signet Ring Cell ; metabolism ; pathology ; Diagnosis, Differential ; Follow-Up Studies ; Humans ; Keratin-5 ; metabolism ; Lymph Node Excision ; Male ; Mastectomy ; methods ; Mucin-1 ; metabolism ; S100 Proteins ; metabolism

Adult ; Diagnosis, Differential ; Humans ; MART-1 Antigen ; metabolism ; Magnetic Resonance Imaging ; Male ; Medulloblastoma ; metabolism ; pathology ; Melanocytes ; pathology ; Melanoma ; diagnosis ; metabolism ; pathology ; surgery ; Melanoma-Specific Antigens ; metabolism ; Meningeal Neoplasms ; diagnosis ; metabolism ; pathology ; surgery ; Neoplasms, Multiple Primary ; diagnosis ; metabolism ; pathology ; surgery ; Neurilemmoma ; metabolism ; pathology ; Nevus of Ota ; diagnosis ; metabolism ; pathology ; surgery ; S100 Proteins ; metabolism ; Skin Neoplasms ; diagnosis ; metabolism ; pathology ; surgery ; Vimentin ; metabolism

Objective To investigate the diagnostic value of ADC histogram obtained from MR DW imaging for stage ⅠB cervical cancer. Methods Seventy three patients diagnosed by cervical smear screening as cervical cancer without priortreatment were included prospectively in the patient group, and staged according to the international federation of gynecology and obstetrics (FIGO) staging system. Forty three patients with uterine leiomyoma detected by gynecologic examination, ultrasonography or CT and with negative result of cervical smear screening who were scheduled for hysterectomy were included prospectively in the control group. The patients of both groups underwent routine pelvic MR sequences, dynamic contrast enhanced imaging and DWI before hysterectomy. ADC histograms of the entire tumor and cervix volume were generated by post-processing software. Features of ADC histogram for the 2 groups were observed. Histogram parameters such as mean ADC (ADCmean), median ADC (ADCmedian), the 25th percentile of ADC (ADC_25th), the 75th percentile of ADC (ADC_75th), skewness and kurtosis were recorded. Student's t test or Mann-Whitney U test depending on homogeneity of variance was employed for the comparison of
those parameters. ROC analysis was employed for assessing the diagnostic performance of ADC histogram in distinguishing the 2 groups. Results Thirty five patients in the patient group were staged as FIGO IB. Five patients in the control group ended up with pathologic findings of cervical intraepithelial neoplasia grade 3. Therefore 38 patients in the control group were investigated. ADC histograms of the patient group were mostly skewed positively, while the curves were largely skewed negatively. ADCmean, ADCmedian, ADC_25th, ADC_75th, skewness and kurtosis for the IB stage patient group were (1.10±0.21)×10-3mm2/s, (1.05±0.21)× 10-3 mm2/s, (0.90 ± 0.19) × 10-3mm2/s, (1.26 ± 0.23) × 10-3mm2/s, 0.83 (median) and 1.25 (median) respectively. ADCmean, ADCmedian, ADC_25th, ADC_75th, skewness and kurtosis for the control group were (1.62 ± 0.25)×10-3mm2/s, (1.64±0.24)×10-3mm2/s, (1.42±0.24)×10-3mm2/s, (1.84±0.27)×10-3mm2/s,-0.11(median) and 0.29 (median) respectively. All parameters showed statistically different (t values were -9.693,- 11.117, -10.255, and -9.988 for ADCmean, ADCmedian, ADC_25th and ADC_75th respectively;Z values were -6.360 and -4.445 for skewness and kurtosis respectively; P< 0.01). ROC analysis indicated that ADCmedian had the highest diagnostic accuracy for differentiating the 2 groups, with the area under the curve being 0.97, a cutoff value of 1.21×10-3mm2/s, and a sensitivity of 95.6%and a specificity of 89.3%. Conclusion ADC histogram of DWI may be valuable for diagnosing stage IB cervical cancer by distinguishing stage IB cervical cancer from normal cervix or cervical benign lesions.

This article described the concept of the professional ethics and discussed the significance of the existence and construction of professional ethics on medical journal editors. The professional ethics on medical journal editors could be beneficial to correctly understand the ethical problems of medical journal editors and to promote the medical journal editors' role localization. It is very important to construct the Standardization of medical journal editors' behavior.

OBJECTIVETo observe the differentiation of bone mesenchymal stem cells (BMSCs) co-cultured with purified sinoatrial node cells (SNC) of neonate rats.

METHODSSNC from neonatal SD rat were cultured and purified with differential attachment method and labeled with BrdU. Rat BMSCs were isolated by a Percoll's gradient solution and cultured in DMEM. After 2 passages, these BMSCs were transfected with pEGFP-N1 by Lipofectamine and labeled with GFP. EGFP-BMSC were co-cultured with SNC in a rate of 1:5 for 1 week. EGFP-BMSC cultured in SNC culture medium served as controls. SNC marker hyperpolarization activated cyclic nucleotide gated cation channel 4 (HCN4) and connexin 45 (Cx45) expressions were determined by immunofluorescence staining.

RESULTPositive immunofluorescence staining against HCN4 and Cx45 were detected in EGFP-BMSC co-cultured with SNC but not in EGFP-BMSC cultured in SNC culture medium.

CONCLUSIONDirect cell-to-cell contact between BMSCs and SNC cells may induce BMSCs differentiation into sinus node-like cells.

Animals ; Bone Marrow Cells ; cytology ; Cell Culture Techniques ; Cell Differentiation ; Cell Separation ; Cells, Cultured ; Coculture Techniques ; Mesenchymal Stromal Cells ; cytology ; Rats ; Rats, Sprague-Dawley ; Sinoatrial Node ; cytology

OBJECTIVETo study the effect of small interfering RNA(siRNA) targeting JARID1B gene on the proliferation and apoptosis in HL-60 acute promyelocytic leukemia cell line, and to explore its mechanisms.

METHODSThe JARID1B siRNA was transfected into HL-60 cells using Lipofectamine(TM) 2000(Lipo) vector. The proliferation inhibition by siRNA targeting JARID1B was detected by MTT, cells apoptosis by flow cytometry, the mRNA expression of JARID1B by RT-PCR, the protein expression of JARID1B, Bcl-2, procaspase-9, procaspase-3, c-myc and P27 and histone methylated H3K4 by Western blot.

RESULTSsiRNA targeting JARID1B upregulated histone methylated H3K4 level, inhibited the proliferation of HL-60 cells, and induced the cells apoptosis. After transfection of siRNA targeting JARID1B at 0, 30, 60, 120 nmmol/L for 24 hours, the apoptotic rate were (11.0 ± 3.6)%, (35.2 ± 5.1)%, (52.7 ± 3.8)%, and (62.0 ± 5.7)% respectively (F = 70.27, P < 0.01). The protein expression of P27 was upregulated, and Bcl-2, procaspase-9, procaspase-3, c-myc was down regulated.

CONCLUSIONSJARID1B siRNA upregulates histone methylated H3K4. It reduces HL-60 cells proliferation and apoptosis by up regulating the p27 expression and down regulating the Bcl-2, procaspase-9, procaspase-3, c-myc expression. It might be a new therapeutic targeting for human leukemia.

Apoptosis ; Caspase 3 ; metabolism ; Caspase 9 ; metabolism ; Cell Proliferation ; Cyclin-Dependent Kinase Inhibitor p27 ; metabolism ; Gene Expression Regulation, Leukemic ; Gene Targeting ; HL-60 Cells ; Histones ; metabolism ; Humans ; Jumonji Domain-Containing Histone Demethylases ; genetics ; Leukemia ; genetics ; Methylation ; Nuclear Proteins ; genetics ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Proto-Oncogene Proteins c-myc ; metabolism ; RNA Interference ; RNA, Messenger ; genetics ; RNA, Small Interfering ; Repressor Proteins ; genetics

OBJECTIVETo investigate the clinicopathological characteristics, diagnosis and treatment of primary testicular yolk sac tumor (YST).

METHODSWe studied 8 cases of primary testicular YST by microscopy and immunohistochemistry.

RESULTSThe 8 cases of primary testicular YST, including 2 consultation cases, were confirmed from 1998 to 2013, accounting for 10.7% (8/75) of all the testicular germ cell tumors diagnosed in our hospital. The patients ranged in age from 7 to 43 years, 23.9 years on average. The main clinical manifestation of the patients was painless unilateral testis swelling. Microscopically, reticular tissues, schiller-duvaI (S-D) bodies, and eosin-stain transparent bodies were seen in the tumors. One of the cases was confirmed to be simple YST, while the other 7 mixed YST. AFP was a characteristic immunophenotype marker of the tumors.

CONCLUSIONPrimary testicular YST is a rare malignancyr with poor prognosis. Its diagnosis depends on preoperative AFP test and postoperative pathology. Comprehensive treatment, including orchiectomy, chemotherapy, and radiotherapy, can prolong the survival of the patients.

Adolescent ; Adult ; Child ; Endodermal Sinus Tumor ; metabolism ; pathology ; therapy ; Humans ; Immunohistochemistry ; Male ; Neoplasms, Germ Cell and Embryonal ; metabolism ; pathology ; therapy ; Orchiectomy ; Rare Diseases ; metabolism ; pathology ; therapy ; Testicular Neoplasms ; metabolism ; pathology ; therapy ; Young Adult