The health information social service in medical college and university libraries was analyzed in terms of the importance attached to it, opening to readers, items of service, requirement of materials, types of readers, and charge of frees, and certain measures were proposed for improving the level of health information social service, such as updating the service concept, innovating the service, and standardizing the management.

ObjectiveTo clone TCF4 (T cell factor 4) gene and construct its eukaryotic expression vector. MethodsThe total RNA was extracted from the aggregated human dermal papilla cells. The full length cDNA encoding TCF4 was obtained by RT- PCR, digested by restriction enzyme, then inserted in the eukaryotic expression vector pcDNA3.0. The sequence and reading frame were confirmed by two restriction enzymes and sequencing. The recombinant vector TCF4/pcDNA3.0 was stably transfected into dermal papilla cells, and the expression changes of TCF4 gene were detected. ResultsTCF4 gene was cloned from dermal papilla cells and its eukaryotic expression vector was constructed. After the identification and sequencing, the reconstructed plasmid was confirmed containing the correct and full nucleotide sequence of TCF4 gene. After stable transfection, the mRNA and protein level of TCF4 gene were up-regulated in dermal papilla cells and the proliferation of dermal papilla cells was promoted. ConclusionThe expression vector TCF4/pcDNA3.0 was constructed successfully and could be expressed in the dermal papilla cells. TCF4 gene can promote the proliferation of the dermal papilla cells.

Objective To observe the changes in sublingual collateral vessels of elderly patients with diabetes. Methods Sublingual collateral vessels of 88 patients with diabetes were observed and compared with that of 76 normal people. Results The changes in sublingual collateral vessels of patients with diabetes were more serious than that of normal people (u=4.174, P

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Autoantibodies ; biosynthesis ; Case-Control Studies ; Child ; Female ; Humans ; Immunoglobulin G ; biosynthesis ; Male ; Middle Aged ; Pancytopenia ; immunology ; pathology ; Receptors, Erythropoietin ; physiology ; Young Adult

Objective To investigate the expression of T cell factor-4 (TCF4) gene in dermal papilla cells of hair follicles.Methods The expression of TCF4 gene was examined by in situ hybridization in scalp tissues of patients with alopecia areata and normal human controls,The protein and mRNA exprcssions of TCF4 were detected by immunochemistry and RT-PCR method,respectively,in aggregated and non-aggregated human dermal papilla cells.ResultsAs shown by in situ hybridization,TCF4 gene was expressed in the dermal papilla cells from healthy controls,but not in those from patients with alopecia areata.Both cell immunochemistry and RT-PCR showed that TCF4 gene expressed in aggregated dermal papilla cells,but not in non-aggregated dermal papilla cells.ConclusionsTCF4 gene is expressed in dermal papilla cells.The growth cycle Of follicles may be related to wnt signal.

Objective To investigate the effects of NB-UVB on the expression of Gadd45α as well as cell apoptosis and cycle of human HaCaT keratinocytes.Methods Cultured HaCaT cells were exposed to various doses (100,200,400 mJ/cm2)of NB-UVB followed by an additional culture of 6,12 and 24 hours,respectively.Reverse transcription PCR and Western blot were performed to detect the mRNA and protein expression of Gadd45α respectively in HaCaT cells,cell counting kit 8 (CCK8)to measure the proliferation of cells,and flow cytometry to determine the cell cycle distribution of HaCaT cells before and after the exposure to NB-UVB.Results Gadd45α was expressed in HaCaT cells.After exposure to NB-UVB of the three doses,the mRNA and protein levels of Gadd45α increased at 6 hours and 12 hours,but declined at 24 hours,and significant changes were observed in HaCaT cells at the three time points after exposure to NB-UVB of the three doses (all P<0.05).The Gadd45α/β-actin mRNA ratio was 1.4360±0.6551.1.8633±0.0979,1.9266±0.1724 in HaCaT cells 12 hours after irradiation to NB-UVB of 100,200 and 400 mJ/cm2,respectively,significantly higher than that in unirradiated cells(0.6000±0.1276,all P<0.05).Also,increased Gadd45α/β-actin protein ratio was noted in HaCaT cells 12 hours after irradiation to NB-UVB of 100,200 and 400 mJ/cm2 compared with unirradiated cells (0.0773±0.0005,0.1936±0.0015,0.2373±0.0015 vs.0.0290±0.0010,all P<0.05).NB-UVB inhibited the proliferation of HaCaT cells in a time-and dose-dependent manner.Flow cytometry showed that irradiated HaCaT cells were blocked in G2 phase of the cell cycle.and the percentage of HaCaT cells in G2 phase was 13.53%±1.03%,17.77%±2.25%,30.03%±4.29%afler exposure to NB-UVB of 100,200 and 400 mJ/cm2,respectively,compared to 9.24%±0.97%in unirradiated cells (all P<0.05).Conclusions The expression of Gadd45α is increased in HaCaT cells after exposure to NB-UVB,and Gadd45α may be involved in the NB-UVB-induced suprression of cell proliferation of and cell cycle arrest in HaCaT cells.

Objective To investigate the correlation and clinical diagnosis significance between ultrasound elastography and the distribution of myofibroblast in breast tumor.To assess the value of ultrasonic elastography and myofibroblast in the diagnosis of breast cancers.MethodsThree-hundred and fifteen patients recruited from May 2009 to November 2010 were divided into benign group and malignant group according to postoperative pathological diagnosis results considered as gold standard.The clinical value of the score of ultrasonic elastography was evaluated.The expression levels of CD34 and α-SMA protein in breast tissues were examined by immunohistochemistry.ResultsThe difference was statistically significant for the expression level of CD34 and α-SMA between malignant breast tumor patients compared with benign ( P ＜0.05).The expression level of CD34 was lower,but α-SMA was higher in the patients of breast cancer compared with benign tumor.However,the expression level of CD34 and α-SMA was just the opposite in the patients of benign tumor.The expression level of CD34 was the negative correlation with the elastography score ( P ＜0.05) in the breast tumor,but α SMA just the opposite situation.Conclusions The score of ultrasound elastography can represent MFS distribution characteristics in breast tumors in the result that α-SMA +/CD34- can determine the existence of myofibroblast.

Chromatography, Reverse-Phase ; methods ; Humans ; Sorbic Acid ; analogs & derivatives ; analysis ; Urinalysis ; methods

OBJECTIVETo investigate the role of autophagy in acute lung injury (ALI) caused by multiple trauma in rats via pretreat with 3-methyladenine (3-MA).

METHODSForty-five Sprague-Dawley male rats, with age of 4 months and body weight of 250-300 g,were randomly divided into three groups. In the sham group, the rats received sphenotresia only;in the control group, the rats were made model of femur shaft fracture combined with brain injury, and treated with physiological saline by abdominal cavity at 1 hour before making model; in the 3-MA group, the rats were made model of femur shaft fracture combined with brain injury,and treated with 3-MA of 10 mg/kg by abdominal cavity at 1 hour before making model. Histologic changes and the concentration of related inflammatory factors in the damaged lung tissue were examined at 48 h after opteration, at the same time, the effect of 3-MA on the expression of LC-3 II and Beclin-1 was examined through reverse transcriptase polymerase chain reaction technique (RT-PCR).

RESULTSCompared with sham group, LC-3 II and Beclin-1 level in control group at 48 h after operation were obviously increased (P < 0.01). Compared with control group, LC-3 II and Beclin-1 level in 3-MA group at 48 h after operation were obviously decreased (P < 0.01). Compared with sham group, the level of proinflammatory cytokines (TNF-α and IL-6) in control group obviously enhanced (P < 0.01). Compared with control group, above items in 3-MA group was obviously lower (P < 0.01). Compared with control group,the histopathological damage of lung in 3-MA group obviously reduced (P < 0.01).

CONCLUSIONAutophagy can aggravate the acute lung injury caused by fracture of shaft of femur combined with brain injuries,but 3-MA can reduce tissue damage by inhibiting the autophagy and inflammatory response.

Acute Lung Injury ; prevention & control ; Adenine ; analogs & derivatives ; therapeutic use ; Animals ; Apoptosis Regulatory Proteins ; analysis ; Beclin-1 ; Interleukin-6 ; analysis ; Lung ; chemistry ; immunology ; pathology ; Male ; Multiple Trauma ; complications ; Rats ; Rats, Sprague-Dawley ; Tumor Necrosis Factor-alpha ; analysis

Objective To analyze MRI features of breast intraductal papilloma,to improve the acquaintance of this disease.Methods The preoperative MRI images (T2 WI-SPAIR,DWI,ADC,TIC and MIP)of eight patients with breast intraductal papilloma confirmed by surgery were reviewed retrospectively,which were compared with the postoperative pathology.The morphology,distribution, enhanced methods and signal characteristics of the lesion were summarized.Results Of 8 cases,the lession was dormant,and MRI revealed three patterns:the first type was occult papilloma,which presented distention of ducts and no solid nodule in 3 cases (37.5%);the second type showed tiny nodules in bar-like dilatation of ducts in 3 cases (37.5%);and the third type presented small round nodules scattering distribued in terminal ductules in 2 cases (25%).The maximum diameter of nodular lesions was 0.4-1.0 cm(average 0.7 cm).The lesions on T2 WI-SPAIR showed equal signal intensity or mixed signals with isointensity/hypointensity,and dilatation catheter.enhancement. The ADC and TIC value were various,therefore,diagnosis of the tumor should be combined with morphology and associated symptoms. Conclusion At early stage,the occult focus of breast intraductal papilloma can be sensitively detected and localized on MRI.It reveals that MRI has advantage in showing morphology of lesion and functional imaging,which is of important value in clinical diagnosis and early treatment.