Objective To explore the clinical significance and the impact on prognosis of blood micrometastasis in the patients with pN0 esophageal squamous cell carcinoma. Methods Total RNA was extracted with TRIzol and mRNA was transcribed reversely into cDNA. RT-PCR was used to detect MMP-7 mRNA and hTERT mRNA in blood. △△Ct sample values were calculated with post-operative follow-up of 3 month, 6 month, 12 month. Results Statistical results suggested that blood micrometastasis was related to differentiation grade and pTNM staging (P=0.000, P=0.000 respectively), but not to age, sex, length of turnout (P0.05). Follow-up results suggested that the degree of invasion and tumor metastasis (recurrence) was no correlation; follow-up to 6 month and 12 month, tumor metastasis (recurrence) was associated with blood micrometastasis, and follow-up to 12 month, compared with the tumor metastasis (recurrence) probability of blood micrometastasis-positive patients and negative patients, the former was as 6.44 times as the latter. (OR=6.440, 95 % CI 1.547-26.822). Conclusion Blood micrometastasis testing is of great significance to early diagnosis and prognosis judgment in pN0 esophageal squamous cell carcinoma patients.

Two cell strains from human pancreatic cancer taken surgically were transplanted to the pancreas of pureline BALB/C-nu/nu nude mice and 9 generations of PTNMP-1 and 6 generations of PTNMP-2 were obtained. Biological properties were studied. It yielded a transplant success rate of 95% - 100% and large amount of CEA. Analysis of the karyotype confermed that they retained the karyotype of human cancer cells. Some lymphatic and blood stream metastasis and invasion could be found in the nude mice orthotopically transplanted with tumour, showing that the transplanted tumour had characteristics identical with the donor tumour.

ABSTRACTOBJECTIVE To observe the effects of Buxin Ruanmai granules BXRM serum on AngiotensinⅡAngⅡ?in-duced oxidative damage related indicatorssuch as SODNADPH MDAp40phoxp47 phox and p67 phoxin HUVEC.METHODS Rats were randomly divided into normal groupValsartan group and BXRM groupeach group of 10and lavaged for 6 weeks.Drug serum were prepared from arterial blood.Then 10-6 mol/L Ang Ⅱ induced HUVEC damage and apoptosis mod-el of human umbilical vein endothelial cells was establishedand drug serum was used to intervene.SOD were determined by xanthinoxidase.NADPH was determined by ELISA.MDA was determined by thibabituric acid method.The expression of p40phoxp47phox and p67phox in cell membrane and cytoplasm of HUVEC were determined by Western blot.RESULTS After HUVECs were damaged by 10-6 mol/L Ang Ⅱthe content of SOD decreased NADPH and MDA increased and p40phoxp47phox and p67phox transferred to the membrane of HUVECs.Howeverthe content of SOD increasedNADPH and MDA de-creasedand p40phoxp47phox and p67 phox were inhibited to transfer to the membraneafter the medication of BXRM serum. CONCLUSION BXRM serum can inhibited the oxidation of AngⅡ induced HUVEC damage and prevent arteriosclerosis.

To investigate the temporal trend of antibiotic use among children in Shanghai from 2017 to 2020. The stratified cluster sampling method was used to establish a dynamic cohort of healthy children based on primary schools in Changning District, Shanghai. In the cohort, there were 282 children from 2017, 287 children from 2018, 294 from 2019 and 301 from 2020. A total of 700 children aged 7-11 years were included in the study. The basic information and antibiotic use of children were investigated by questionnaire every year, and their height and weight were measured at the same time. Chi-square test was used to analyze the difference of antibiotic use rate in each year and generalized estimation equation was used to analyze the temporal trend of antibiotic use. The results showed that the use rates of all antibiotics, cephalosporins, azithromycin and other antibiotics (including penicillin, lincomycin, quinolones, etc.) of children between 2017 and 2020 were 15.6%, 10.5%, 2.7%, and 2.4%, respectively. In 2017, 2018, 2019, and 2020, there were significant differences for the use rates of total antibiotics and other antibiotics in children ( P=0.033, P=0.040), and there were no significant differences for the use rates of cephalosporins and azithromycin ( P=0.274, P=0.455). After adjusting for children′s basic characteristics, the generalized estimation equation showed that the annual use rate of all antibiotics, cephalosporins, and other antibiotics decreased over time.

To investigate the temporal trend of antibiotic use among children in Shanghai from 2017 to 2020. The stratified cluster sampling method was used to establish a dynamic cohort of healthy children based on primary schools in Changning District, Shanghai. In the cohort, there were 282 children from 2017, 287 children from 2018, 294 from 2019 and 301 from 2020. A total of 700 children aged 7-11 years were included in the study. The basic information and antibiotic use of children were investigated by questionnaire every year, and their height and weight were measured at the same time. Chi-square test was used to analyze the difference of antibiotic use rate in each year and generalized estimation equation was used to analyze the temporal trend of antibiotic use. The results showed that the use rates of all antibiotics, cephalosporins, azithromycin and other antibiotics (including penicillin, lincomycin, quinolones, etc.) of children between 2017 and 2020 were 15.6%, 10.5%, 2.7%, and 2.4%, respectively. In 2017, 2018, 2019, and 2020, there were significant differences for the use rates of total antibiotics and other antibiotics in children ( P=0.033, P=0.040), and there were no significant differences for the use rates of cephalosporins and azithromycin ( P=0.274, P=0.455). After adjusting for children′s basic characteristics, the generalized estimation equation showed that the annual use rate of all antibiotics, cephalosporins, and other antibiotics decreased over time.