Aim Tostudytheinfluencesofsulfated polysaccharides ( SPPM60-D) on the regulation of free calcium concentration ( [ Ca2+] i ) of T lymphocytes of mice in vitro and explore the mechanisms involved. Methods Polysaccharides(PPM60)wereextracted from masson pine pollen with hot water and 60% etha-nol. PPM60-D was separated and purified from PPM60 with Sephacryl S-400HR. Sulfated polysaccharides ( SPPM60-D ) were derivated by chlorosulfonic acid-pyridine method and the [ Ca2+] i of T lymphocytes were measured by fluorescence spectrophotometer. IL-2 and IL-4 were measured by ELISA kits. Results ConAandSPPM60-Dcouldincrease[Ca2+]iinT lymphocytes by 211. 5% and 201. 8% respectively ( P<0. 01). 2-APB, LY294002, U73122 and verapamil rather than TAK-242 could significantly inhibit the in-crease of [ Ca2+] i induced by SPPM60-D. SPPM60-D could significantly increase the level of IL-2 and IL-4 in supernatant ( P <0. 01 ) . 2-APB rather than TAK-242 could significantly inhibit the increase of cyto-kines.Conclusion ItisspeculatedthatSPPM60-D could increase [ Ca2+ ] i via TCR/CD3-PI3K-PLC-IP3 R-Ca2+ signal pathway through TCD/CD3 receptor in T lymphocytes so that it could improve the level of IL-2 and IL-4 in supernatant in T lymphocytes.

Objective To explore the hearing screening, and the change and outcome of hearing impairment of high risk infants. Meth-ods From March, 2015 to March, 2016, 336 high risk infants were screened with otoacoustic emissions (OAE), auditory brainstem response (ABR) and brainstem auditory evoked-potential (BAEP) 0-1, 3, 6, 12 months after born, respectively. Results Among the 336 high risk in-fants, 29 failed the examinations within the 1st month, 37 cases failed in the 3rd month, 27 cases recovered in the 9th month, and 7 cases re-covered in the 12th month, 3 cases were finally diagnosed as deafness (0.89%). Conclusion OAE, ABR combining with BAEP examination may obtain comprehensive diagnosis of hearing impairment for high risk infants, continuous listening comprehension monitoring can effec-tively dynamically observe the hearing impairment, changes and outcome of high risk infants.

Objective To investigate the molecular mechanisms of synergistic effects of BFA and CDDP on human lung cancer GLC-82 cells, and to test the levels of PERK-ATF4 pathway. Methods GLC-82 cells were incubated with 50 ng/mL of BFA or/and 2 μg/mL of CDDP for 24 or 48 hours. The levels of PERK, p-PERK and ATF4 in GLC-82 were analyzed by real-time PCRand/or Western Blot. Results The levels of PERK were lowest in CDDP group, but higher in BFA group (P < 0.05), the highest in group of BFA+CDDP (P < 0.05 or P < 0.01). The p-PERK level decreased in group of BFA+CDDP (P < 0.05 or P < 0.01). There was no significant change of ATF4 expression in CDDP group, but ATF4 expression increased slightly in BFA group, and increased further in group of BFA+CDDP (P < 0.05 or P < 0.01)which was also higher than that in BFA group or CDDP group (P < 0.05 or P < 0.01). Conclusions The upregulated levels of PERK and ATF4 by the combination of BFA and CDDP may be one of the mechanisms of synergistic anti-cancer effect of BFA and CDDP on GLC-82 cells.

Objective:To explore the clinical effect of ultrasound evaluation of fiberoptic bronchoscope (FB) guided tracheotomy, which can provide help for difficult tracheotomy and new operators.Methods:The operating protocol was standardized for ultrasound evaluation of FB guided tracheotomy. Ten patients with difficult tracheotomy admitted to the department of critical care medicine of Donge Hospital from October 2019 to January 2020 were enrolled. According to this protocol, FB guided tracheotomy was performed under the ultrasound evaluation, and the amount of blood loss, operation time and related complications during procedures were collected.Results:The preparation of supplies, personnel, patients and the operation, the process of FB guided tracheotomy under the ultrasound evaluation were standardized. When tracheotomy was preformed for patients with difficult tracheotomy, it was necessary to use ultrasound first to evaluate the neck condition and vascular disorientation of patients, and the tracheotomy plan (tracheotomy site, incision size, and incision depth) was designed, and then the tracheotomy process was monitored under the guidance of FB. Among the 10 patients with difficult tracheotomy, 6 were male and 4 were female; body mass index was (32.2±1.4) kg/m 2. Tracheotomy was successfully completed within 10 minutes in all the 10 patients, with less than 5 mL blood loss, and no complications occurred. Conclusion:Ultrasound evaluation of FB guided tracheotomy can improve the clinical operations and ensure patient safety.

Objective To investigate the synergistic effects of tannic acid(TA) and cis-dichlorodiamine platinum(CDDP) on hepatocellular carcinoma HepG2 cells and its activation situation of endoplasmic reticulum stress(ERS) pathway.Methods Human hepatocellular carcinoma HepG2 cells were divided into the control group,TA group,CDDP group and TA+CDDP group,and were cultured in vitro for 24 h.The growth inhibitory effect of medication on HepG2 cells was detected by MTT assay.The pharmacodynamics synergistic effect between the two drugs was analyzed by the drug interaction index,drug dose reduction index and equivalent graphical method.The nucleus changes were observed by DAPI staining.Real time fluorescent quantitative PCR(q-RT-PCR) and Western blot were used to detect the levels of ERS markers glucose regulated protein (GRP)78 and GRP94.Results TA and CDDP had dose-dependent growth inhibition effect on HepG2 cells,their median effective concentrations(IC50) were 360.00 μmol/L and 1.80 μg/mL respectively.The combination treatment of 180.00 μmol/L TA and 0.90 μg/mL CDDP on HepG2 cells could enhance the inhibitory effect on cell growth.Ta and CDDP had synergistic effect for inhibiting hepatocellular carcinoma cells growth.Compared with the TA group and CDDP group,cell shrinkage and rounding were accelerated in the combined group,apoptotic cells were increased,nuclear had pyknosis,irregular edge and dense staining,nuclear fragmentations were increased and the expressions of GRP78 and GRP94 were up-regulated.Conclusion TA can enhance the effect of CDDP on anti-hepatic carcinoma HepG2 cells,and the synergy mechanism may be related to the activation of ERS pathway.

OBJECTIVE: To explore the genetic basis for a patient with episodic ataxia and pyramidal tract signs. METHODS: The patient was subjected to high-throughput sequencing, Sanger sequencing and analysis of dynamic variant site associated with spinocerebellar ataxias (SCA). RESULTS: The patient was an adolescent male presenting with episodic ataxia, bilateral knee hyper-reflexia and ankle clonus. By genetic testing, he was found to harbor a c.1159-1162dupAAGT variant of PDHA1 gene. The same variant was not found in his parents and elder sister. No abnormalities were found by SCA dynamic variant screening. The patient was diagnosed as pyruvate dehydrogenase E1alpha deficiency due to variant of the PDHA1 gene. CONCLUSION The de novo c.1159-1162dupAAGT variant of the PDHA1 gene probably underlies the disease in the proband. Patients with pyruvate dehydrogenase E1alpha deficiency have complex phenotypes and very few have pyramidal tract involvement, which may be attributed to abnormal early neuronal development.

Objective To detect the activation levels of endoplasmic reticulum stress ATF6-CHOP pathway,and to investigate the molecular mechanism of tannic acid (TA) combined with cisplatin (CDDP) against hepatocellular carcinoma.Methods HepG2 cells were cultured with 180 μM TA or/and 0.9 μg/ml CDDP for 24 h or 48 h.The levels of ATF6 (ATF6α),ATF6B (ATF6β) and CHOP were analyzed by real-time fluorescence quantitative PCR (q-RT-PCR) and western blot.Results We found that after 24 h or 48 h,compared with the control group,ATF6 mRNA and protein levels,ATF6B protein level,CHOP mRNA and protein levels were significantly increased in the TA group,CDDP group or combination group (P ＜ 0.01 or P ＜ 0.05).Conclusion TA can combine with CDDP to increase the levels of endoplasmic reticulum stress ATF6-CHOP pathway,and the ATF6-CHOP pathway may be one of the molecular mechanisms synergistic anti-hepatocellular carcinoma effect of TA and CDDP on HepG2 cells.