It has been reported that ACE2 is the main host cell receptor of 2019-nCoV and plays a crucial role in the entry of virus into the cell to cause the final infection. To investigate the potential route of 2019-nCov infection on the mucosa of oral cavity, bulk RNA-seq profiles from two public databases including The Cancer Genome Atlas (TCGA) and Functional Annotation of The Mammalian Genome Cap Analysis of Gene Expression (FANTOM5 CAGE) dataset were collected. RNA-seq profiling data of 13 organ types with para-carcinoma normal tissues from TCGA and 14 organ types with normal tissues from FANTOM5 CAGE were analyzed in order to explore and validate the expression of ACE2 on the mucosa of oral cavity. Further, single-cell transcriptomes from an independent data generated in-house were used to identify and confirm the ACE2-expressing cell composition and proportion in oral cavity. The results demonstrated that the ACE2 expressed on the mucosa of oral cavity. Interestingly, this receptor was highly enriched in epithelial cells of tongue. Preliminarily, those findings have explained the basic mechanism that the oral cavity is a potentially high risk for 2019-nCoV infectious susceptibility and provided a piece of evidence for the future prevention strategy in dental clinical practice as well as daily life.

Objective To observe the effects of betulinic acid (BA) on proliferation of human hepatoma stem cell;To discuss its anti-cancer mechanism from the aspects of cell cycle and cell apoptosis. Methods HepG2 stem cells were cultivated in vitro and testified the self-renewal capacity. The effects of BA in concentration of 40, 20, 10, 5, 2.5, 1.25μmol/L on the cell vitality of cultured human liver cancer stem cells for 24 and 48 hours were measured with CCK-8 method. The human hepatoma stem cell line HepG2 was administrated by BA at concentrations of 40, 20, 10, 5μmol/L for 48 hours, and cell cycle and apoptosis rate were measured by flow cytometry. Results BA could inhibit HepG2 stem cell proliferation obviously with dose-effect relationship. BA influenced cell cycle, and induced tumor stem cell apoptosis. 40μmol/L BA blocked cell cycle in S phase, and cell apoptosis rate reached 10.86%. Conclusion BA has obvious inhibitory effects on proliferation of HepG2 liver cancer stem cell, which probably plays a part in anti-cancer by influencing cell cycle and inducing cell apoptosis.

OBJECTIVETo explore the clinical efficacy and safety of gastroepiploic tunnel esophagogastrostomy applied in minimally invasive esophagectomy and gastroesophageal cervical anastomosis.

METHODSClinical data of 137 esophageal cancer patients who received minimally invasive esophagectomy from December 2013 to June 2015 in Department of Thoracic Surgery, Tangdu Hospital, The Fourth Military Medical University were analyzed retrospectively, including 84 patients receiving anastomosis with tubular anastomat (circular staple group), and 53 patients receiving gastroepiploic tunnel anastomosis(tunnel group, position of tunnel anastomosis located in the side of gastrocolic omentum, about 2-3 cm apart from fundus). Incidence of postoperative anastomotic leakage and stricture was compared between two groups.

RESULTSAll the 137 patients completed minimally invasive esophageal surgeries successfully without conversion to open thoracic or abdominal operation. The time for anastomosis was(20.2±3.1) minutes in circular stapler group and (38.9±2.9) minutes in tunnel group respectively, and the difference was statistically significant (t=75.22, P=0.000 0). The incidence of postoperative anastomotic leakage was 21.4%(18/84) in circular stapler group and 0(0/53) in tunnel group respectively, and the difference was statistically significant (P=0.000 3). All the patients were followed up for more than 6 months. During follow-up period, the incidence of postoperative anastomotic stricture was 14.3%(12/84) in circular stapler group and 3.8%(2/53) in tunnel group respectively, and the difference was statistically significant(P=0.047 9).

CONCLUSIONThe gastroepiploic cervical tunnel anastomosis is safe and effective and can reduce the incidence of postoperative anastomotic leakage as well as anastomotic stricture.

Anastomosis, Surgical ; adverse effects ; methods ; Anastomotic Leak ; epidemiology ; prevention & control ; Comparative Effectiveness Research ; Constriction, Pathologic ; epidemiology ; prevention & control ; Esophageal Neoplasms ; complications ; surgery ; Esophagectomy ; adverse effects ; methods ; Esophagoplasty ; adverse effects ; methods ; Humans ; Minimally Invasive Surgical Procedures ; adverse effects ; methods ; Neck ; surgery ; Omentum ; Postoperative Complications ; epidemiology ; Retrospective Studies ; Surgical Stapling ; adverse effects ; methods

OBJECTIVEInvestigate the best surgical resection of esophageal cancer by comparing the efficacy and safety between Ivor-Lewis esophagectomy and Sweet esophagectomy.

METHODSThe relevant literatures comparing Ivor-Lewis esophagectomy with Sweet esophagectomy were searched through PubMed, Embase, the Cochrane Library, Google scholar, CNKI, CBM, VIP, WanFang Data. RevMan 5.2 software was used for data analysis.

RESULTSA total of 4106 patients in 15 studies were reviewed and the data were pooled for analysis. Meta-analysis showed that, compared with the Sweet group, Ivor-Lewis operative time was significantly longer(pooled mean difference=57.40; 95%CI:42.43 to 72.38; P=0.000), operative bleeding was significantly higher(pooled mean difference=28.39, 95%CI:4.06 to 52.72, P=0.02); the number of lymph node dissection significantly more(pooled mean difference=4.19, 95%CI:3.06 to 5.32, P=0.000); No significant difference was present in hospital stay, vocal cord paralysis, chylous leakage, pulmonary complications, anastomotic leakage(all P>0.05). The 5-year survival between the two groups showed no significant difference(P=0.52).

CONCLUSIONSThe two kinds of operation have the same long term effect. Compared with Ivor-Lewis operation, Sweet operation is easier to perform, less time consuming and more tolerable. Ivor-Lewis operation can dissect more lymph nodes than Sweet operation, without increased complications.

Esophageal Neoplasms ; surgery ; Esophagectomy ; methods ; Humans ; Lymph Node Excision ; Lymph Nodes ; pathology

Objective To study the effects of toys for laboratory animals on reproductive performance and growing development of experimental mice.Methods ICR mice were fed with toys, the informations of reproductive performance and growing development were recorded.Results All the data of reproductive performance of the test group were higher than the control group except the number of newborn mice, and showed significant difference ( P <0.05 ) .The data of growing development of the test group were higher than the control group too, but showed no significant difference ( P >0.05).Conclusion Toys for laboratory animals have good effects on reproductive performance and growing development of mice, and suggested to be used into the process of experimental mice raising.

Objective Investigate the best surgical resection of esophageal cancer by comparing the efficacy and safety between Ivor-Lewis esophagectomy and Sweet esophagectomy. Methods The relevant literatures comparing Ivor-Lewis esophagectomy with Sweet esophagectomy were searched through PubMed, Embase, the Cochrane Library, Google scholar, CNKI, CBM, VIP, WanFang Data. RevMan 5.2 software was used for data analysis. Results A total of 4106 patients in 15 studies were reviewed and the data were pooled for analysis. Meta-analysis showed that, compared with the Sweet group, Ivor-Lewis operative time was significantly longer (pooled mean difference=57.40; 95%CI:42.43 to 72.38;P=0.000), operative bleeding was significantly higher (pooled mean difference=28.39, 95%CI:4.06 to 52.72, P=0.02); the number of lymph node dissection significantly more (pooled mean difference=4.19, 95%CI:3.06 to 5.32, P=0.000); No significant difference was present in hospital stay, vocal cord paralysis, chylous leakage, pulmonary complications, anastomotic leakage (all P>0.05). The 5-year survival between the two groups showed no significant difference (P =0.52). Conclutions The two kinds of operation have the same long term effect. Compared with Ivor-Lewis operation, Sweet operation is easier to perform, less time consuming and more tolerable. Ivor-Lewis operation can dissect more lymph nodes than Sweet operation , without increased complications.

Objective Investigate the best surgical resection of esophageal cancer by comparing the efficacy and safety between Ivor-Lewis esophagectomy and Sweet esophagectomy. Methods The relevant literatures comparing Ivor-Lewis esophagectomy with Sweet esophagectomy were searched through PubMed, Embase, the Cochrane Library, Google scholar, CNKI, CBM, VIP, WanFang Data. RevMan 5.2 software was used for data analysis. Results A total of 4106 patients in 15 studies were reviewed and the data were pooled for analysis. Meta-analysis showed that, compared with the Sweet group, Ivor-Lewis operative time was significantly longer (pooled mean difference=57.40; 95%CI:42.43 to 72.38;P=0.000), operative bleeding was significantly higher (pooled mean difference=28.39, 95%CI:4.06 to 52.72, P=0.02); the number of lymph node dissection significantly more (pooled mean difference=4.19, 95%CI:3.06 to 5.32, P=0.000); No significant difference was present in hospital stay, vocal cord paralysis, chylous leakage, pulmonary complications, anastomotic leakage (all P>0.05). The 5-year survival between the two groups showed no significant difference (P =0.52). Conclutions The two kinds of operation have the same long term effect. Compared with Ivor-Lewis operation, Sweet operation is easier to perform, less time consuming and more tolerable. Ivor-Lewis operation can dissect more lymph nodes than Sweet operation , without increased complications.

Objective To compare the clinical results of anterior cruciate ligament(ACL)reconstruction using anterior tibial muscle tendons allograft and hamstring tendons autograft.Methods According to the graft used for ACL reconstruction,60 patients with chronic ruptures of ACL were divided into group A(30 patients,using anterior tibial muscle tendons allograft)and group B(30 patients,using semitendinosus and gracilis tendons autograft).The average follow-up periods after surgery were 29.4 and 31.6 months respectively.Lysholm,Tegner,IKDC clinical rating scales and KT2000 were used for evaluation pre-and post-operation.The muscle strength of the extension,flexion,internal rotation and external rotation of knees was evaluated by the isokinetic tester.Results There were statistically significant differences in Lysholm,Tegner,IKDC clinical rating scales and KT2000 results between pre-and postoperation(P<0.01).However,there were no statistically significant differences between group A and group B after operation(P>0.05).The Isokinetic muscle strength tester showed that the knee muscle strength of the internal rotation and flexion were decreased post-operative in group B,rather than group A,which showed no significant differences between pre-and post.operation(P<0.05).Conclusion For ACL reconstruction under arthroscopy,anterior tibial muscle tendons allograft was a favorable substitute for autograft materials for its convenience,satisfactory clinical effect and less complications.

Objective To investigate the relationship between single nucleotide polymorphism in estrogen metabolizing genes CYP17、CYP19 and breast cancer susceptibility.Methods A case-control study was performed.PCR-base restriction fragment length polymorphism(PCR-RFLP)and short tandem repeat polymorphism(STRP)assay were used to detect the single nucleotide polymorphism of CYP17、CYP19 in 213 breast cancer cases and 430 matched controls.Resuits CYP17 A2/A2 genotype was found in 6.7%of breast cancer cases,which was significantly higher(P＜0.05)than that in controls(2.4%);the frequency of A2 allele of CYP17 was 16.2%in breast cancer cases,which was significantly higher(P＜0.05)than that in controls(10.6%).There Was alSO significant difference in the frequency of(TTTA)10allele of CYP19 which was 12.4%in breast cancer cases and 8.2%in controls(P=0.02).Conclusions The allele of CYP17 A2 and CYP19(TTTA)10 and CYP17 A2/A2 genotype were positively associated with the susceptibility of breast cancer.

Object To study the inherited relationships among nine medicinal mulberry populations cultivated in different regions of Xinjiang at DNA level Methods DNA of all populations was amplified by ten random primers from 100 ramdom primers, the polymorphic bands of RAPD were counted And the results of populations were analyzed by clustering analysis NTSYS PC software Results A total of 108 bands was obtained, 91 of total bands (84 26%) was polymorphic The results indicated that there were apparent and abundant genetic variations in Morus L of Xinjiang Besides, eight specific bands of M nigra were obtained Conclusion The genetic relationship among medicinal resources plants of mulberry in Xinjiang indicats by the RAPD analysis to be consistent with their traditional classifications in the main