Described in this paper are the characteristics of medical big data such as multi-dimensionalities, non-integrities, time sequencing, redundancies, their sources such as health service,medical insurance,health adminis-trations, producers of drugs and medical equipments, Internet, life science, their applications in R & D of drugs, diagnosis and treatment of diseases,medical insurance,intelligent decision-making,individual health management, and challenges they are faced such as data integration,data storage,data sharing, shortage of trained professionals, and privacy protection.

Objective To study the clinical characteristics of silent paraganglioma ( PGL) .Methods A total of 21 patients with silent PGL confirmed by surgical pathology and hospitalized in the First Affiliated Hospital of chongqing Medical University from Mar .2008 to Dec.2013 were enrolled in this study .The clinical manifesta-tions, hormone level, imaging findings, pathologic characteristic, treatment and follow-up data were reviewed and analyzed retrospectively .Results Among the 21 cases of silent PGL , 8 were male and 13 were female, with 47.05 years as the mean age(ranging from 26 to 67 years old).PGL tumors in silent group were mainly located in the right side, and left to right ratio was 2∶5.Silent PGL with tumor diameter <3 cm, 3-5 cm, >5 cm were 5, 7,and 9 cases respectively.Its constituent ratio was 23.8%, 33.3% and 42.9% respectively, significantly higher compared with that of symptomatic PGL (9.8%,43.9%,and 46.3%respectively).Silent PGL can be i-dentified from other adrenal incidentaloma based on enhanced CT value in each period .Biochemical examination or functional imaging further could facilitate the diagnosis of silent PGL .All the 21 cases were conducted with surgical treatment , and hypertensive crisis occurred to 4 cases during operation .Conclusions Silent PGL is not easy to be detected due to its non-specific clinical manifestations .The diagnosis needs the combined analysis on anatomical imaging characteristics , biochemical examination , functional imaging and pathological findings .Sur-gery is the most effective treatment .Postoperative pathological tips and long-term follow-up are both required for PGL, no matter benign or malignant .

Objective To investigate the effect of oxytocin combined with misoprostol in the prevention of postpartum hemorrhage of uterine contraction,and to provide reference for clinical treatment.Methods 150 women who underwent cesarean section were randomly divided into observation group and control group,75 cases in each group.The two groups were all in the expulsion of the fetus after injection of oxytocin in the uterine wall.The control group after delivery of the placenta received oxytocin intravenous infusion in the prevention and treatment of postpar-tum hemorrhage,the observation group used misoprostol under the tongue to prevent postpartum hemorrhage.The inci-dence of bleeding and postpartum hemorrhage was compared between the two groups.The effective rate and incidence rate of adverse reactions of the two groups were compared.Results The bleeding volume of the observation group was (348.06 ±218.36) mL,and the incidence rate of postpartum hemorrhage was 2.67%,which were significantly lower than the control group (t=5.25,χ2 =12.37,all P<0.05).The effective rate of the observation group was 64%,the total effective rate was 93.33%,the total effective rate was significantly higher than that in the control group (χ2 =10.671,9.22,all P<0.05).1 case of nausea and vomiting occurred in the control group,2 cases had fever,the incidence rate of adverse reactions was 4.00%.5 cases in the observation group had nausea and vomiting,3 cases had fever,the incidence rate of adverse reactions was 10.67%.The incidence of adverse reactions had no significant difference between the two groups.Conclusion Oxytocin combined with misoprostol can significantly reduce the amount of postpartum hemorrhage,reduce the incidence of postpartum hemorrhage,and less adverse reactions,it is the effective treatment for prevention and treatment of uterine contraction fatigue postpartum hemorrhage.

OBJECTIVE:To study the effect of ginsenoside Rg1 on facial nerve regeneration in ovariectomized rats.METHODS:48 ovariectomized SD rats were randomly assigned into sham operation group (normal saline),model group (normal saline),nerve growth factor group (NGF,10 mg?kg-1) and ginsenoside group (10 mg?kg-1).Ovariectomized model were induced and received relevant drugs.The behavior changes of rats were observed.The morphology changes of facial nucleus were detected under transmission electron microscope (TEM) and light microscopy.BDNF expression of facial nucleus was determined with immunohistochemistry.RESULTS:The morphology of the facial nucleus was improved.The BDNF expression of 3D facial nucleus in model group,NGF group and ginsenoside group were increased after facial nerve was injured.The BDNF expression was decreased on 7th day while increased on 14th day.The thickness of regenerating nerve fiber in ginsenoside group was superior to in model group (P

Objective To investigate the relationship between PrfA-dependent promoters and PrfA regulation. Methods LacZ reporter gene fusions used to investigate the inhibitory elements for PrfA-dependent transcription were carried on two promoters of Listeria monocytogenes: a PrfA-dependent promoter of the phospholipase gene pica (PplcA) and a putative promoter of the aroA gene (ParoA2) which contains a similar PrfA-binding site (PrfA-box) and a similar-10 box as PplcA but does not function as PrfA-dependent promoter. A series of hybrid plcA-aroA promoters by exchanging corresponding sequence elements of these two "promoters" were constructed and incorporated into upstream of a promoterless lacZ gene. The variant promoter-lacZ transcriptional fusions were then electroporated into L. monocytogenes wild-type strain P14, prfA mutant P14a and prfA deletion mutant A42, respectively. The expression level of PrfA is the highest in the P14a and the lowest in A42. The corresponding transcription activities of hybrid promoters were measured by the β-galactosidase assay. Results The two critical elements of PrfA-dependent promoters, the PrfA-box and the-10 box, can be functionally exchanged as long as the distance in between is maintained 22 or 23 bp. However, the interspace sequence and the sequence downstream of the -10 box of ParoA2 were strongly inhibitory for PrfA-dependent transcription. Conclusion Downstream sequence together -10 box of ParoA2 might fold into a hairpin structure when present in a single stranded DNA and possibly block the formation of the transcriptional initiation open complex, hence, inhibit the PrfA-dependent transcription from ParoA2.

Objective To investigate the expression and significance of hypoxia-inducible factor 1 alpha (HIF- 1α), vascular endothelial growth factor (VEGF) and angiopoietin-2 (Ang-2) in tissues of condy- loma acuminatum (CA) in pregnant women. Methods Tissue specimens were obtained from the lesions of 30 pregnant women with CA and 30 non-pregnant women with CA, and from the vulva of 15 normal preg- nant women. By immunohistochemical staining, the expressions of HIF -1α, VEGF and Ang-2 were detected in these specimens. Results The expression rates of HIF -1α,VEGF and Ang-2 were 86.67%, 93.33% and 83.33% in pregnant women with CA, respectively, 63.33%, 66.67% and 53.33% in non-pregnant women with CA, respectively, and 0, 6.67% and 0 in normal women, respectively. Enhanced expressions of HIF -1α,VEGF and Ang-2 were observed in pregnant women with CA compared with the latter two groups (P < 0.05). In pregnant women with CA, a significant correlation was noted between the expression of HIF -1α and VEGF (r = 0.412, P < 0.01) and between the expression of Ang-2 and VEGF (r = 0.460, P < 0.01). Further more, the expression of HIF -1α, VEGF and Ang-2 positively correlated with each other in non-preg- nant women with CA. Conclusion In tissues of CA in pregnant women, HIF-1α,Ang-2 and VEGF are over expressed, which may be related to angiogenesis.

Objective To investigate the formation and elimination of photoproduct in epidermal cells from BALB/c mice irradiated with ultroviolet B, and to observe the interference by baicalin in it. Methods BALB/c mice were randomized into 6 groups, I.e., blank control group receiving no exposure or protection, baicalin group receiving protection with baicalin, acetone group receiving acetone pretreatment, UVB group receiving UVB irradiation but no protection, UVB + baicalin group receiving UVB irradiation and protection with baicalin, UVB + acetone group receiving acetone pretreatment and UVB irradiation. Baicalin was applied at 1 mg/cm2 on the back of mice for 3 days in baicalin group and UVB + baicalin group. Twenty hours after the last application, UVB irradiation of 180 mJ/cm2 was given to mice in UVB group and UVB + baicalin group. Skin specimens were obtained from the tested sites at 1, 24, and 48 hours, respectively, after the irradiation. Cyclobutane pyrimidine dimers (CPD) was detected in the specimens with immunohistochemical staining and Southwestern dot blotting. Results CPD was observed only in irradiated mice. The relative content of CPD in epidermal cells 1, 24 and 48 hours after the irradiation was (100±5.22)%, (75.34±8.22)% and (42.11±3.24)%, respectively, in UVB group, (81.45±5.22)%, (32.14±6.33)% and ( 5.21±3.15 )% respectively, in UVB+baicalin group, ( 106±8.21 )%, (70.23±4.13 )% and (41.22±4.21)%, respectively, in UVB + acetone group. A significant difference was observed in the relative content of CPD between UVB group and UVB + baicalin group at 1, 24 and 48 hours after the irradiation (P<0.05, 0.01, 0.01, respectively). Conclusions Taken together, these results suggest that topical baicalin application mitigates DNA photo-damage. Baicalin is therefore a promising protective substance against UVB radiation.

Objective To explore the clinical value of early diagnosis of ovarian cancer by serum lysophosphatidic acid(LPA) and CA-125.Methods 50 patients with ovarian cancer from October 2005 to February 2008 were selected as ovarian cancer group,at the same period selected 44 patients with ovarian benign tumor(ovarian benign disease group),and 50 healthy women as the healthy control group.All patients were diagnosed and confirmed by preoperative blood and pathology.The serum LPA and CA-125 of two groups were detected.Results The serum LPA level and the positive rate in the ovarian cancer group was higher than that of the ovaries benign group or the control group(P＜0.05).The CA-125 level in the ovarian cancer group was similar to that of the ovaries benign group(P＞0.05),while the CA-125 level in the ovarian cancer group or the ovaries benign group was higher than that of the control group(P＜0.05).The specificity of the LPA was better than that of the CA-125 detection.In the early diagnosis of ovarian cancer,the sensitivity of the combination(85.7%) was better than either of them(P＜0.01);the plasma LPA level and positive rate of CA-125 of the phase Ⅱ～Ⅳ ovarian cancer patients were higher than that of phase Ⅰ (P＜0.01);the CA-125 positive rate of the serious cystadenocarcinoma was higher than that of the cystadenocarcinoma(P＜0.01).Conclusion LPA is a sensitive biomarker for the early diagnosis of ovarian cancer,especially combined with CA-125.It should be widely used in clinic.

Objective To detect the level of the serum estradiol-2 (E_2), tumor necrosis factor-alpha (TNF- α) and vascular endothelial growth factor (VEGF) in patients with endometriosis (EMS) and explore their clinical significance. Methods Fifty-nine EMS patients from January 2006 to January 2009 were selected as EMS group and 60 normal women were selected as control group. The serum E_2,TNF-αand VEGF in EMS group 24 h pre-operation, 7 d post-operation and 6 months after operation were detected, and compared with control group. Results The levels of the serum E_2[(216.5 ± 59.7) ng/L],TNF- α [(30.4 ± 17.5) μg/L]and VEGF [(250.7 ± 88.7) ng/L]in EMS group pre-operation were significantly higher than those in control group [(100.2 ± 33.2) ng/L, (11.2 ± 3.6) μg/L, (103.2 ± 49.2) ng/L]and post-operation [(121.3±44.6) ng/L, (13.4 ± 6.2) μg/L, (153.9 ± 58.7) ng/L](P < 0.01). But there was no significant difference between control group and post-operation of EMS group (P > 0.05). The levels of the serum E_2 [(316.5 ± 77.6) ng/L],TNF-α [(51.1 ± 12.3) μg/L]and VEGF [(305.1±69.7) ng/L]with stage Ⅲ-Ⅳ in EMS group were higher than those in control group or those with stage Ⅰ - Ⅱ [(170.7±48.2) ng/L, (25.8 ± 10.1) μ g/L, (169.2 ± 36.1) ng/L](P < 0.05 or < 0.01). The levels of the serum E_2,TNF- α and VEGF with stage Ⅰ - Ⅱ in EMS group were also higher than those in control group (P < 0.05). Nine patients recurred at 6 months after the operation. The levels of the serum E_2[(187.8 ± 46.7) ng/L],TNF- α [(23.9 ± 9.5) μg/L]and VEGF [(185.3 ± 57.4) ng/L]of the recurred EMS patients stepped up significantly higher than those of the non-recurred EMS patients [(112.7±30.3) ng/L, (13.2±4.7) μg/L, (116.4±30.3) ng/L](P < 0.01). While there was no significant difference between control group and non-recurred EMS patients (P >0.05). Conclusions The serum E_2,TNF-αand VEGF may play important roles in the development of the EMS. And the detection of the serum E_2,TNF-αand VEGF is useful to judge the patient's condition and the prognosis of the EMS.