The function and mechanism of long non-coding RNA RP11-159K7.2 in sinonasal squamous cell carcinoma / 中华耳鼻咽喉头颈外科杂志

Objective: To explore the role and mechanism of long non-coding RNA RP11-159K7.2 in the progression of sinonasal squamous cell carcinoma (SNSCC). Methods: Sixty-five cases of SNSCC tissues and adjacent tissues were selected from the Department of Otorhinolaryngology Head and Neck Surgery, the Second Affiliated Hospital of Harbin Medical University from 2009 to 2014. The expression of RP11-159K7.2 in SNSCC and adjacent tissues was detected by RNAscope in situ hybridization to observe its association with prognosis. Clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR associated proteins 9 (CRISPR/Cas9) was used to knockout the expression of RP11-159K7.2 in RPMI-2650 cells (SNSCC cell line). Cell counting kit-8 (CCK-8), wound healing and Transwell were performed to observe the changes of proliferation, migration and invasion of SNSCC cells in vitro after down-regulation of RP11-159K7.2. Moreover, the growth of xenograft in nude mice after down-regulation of RP11-159K7.2 was examined in vivo. Mechanically, the protein chip, Western blot and RNA immunoprecipitation were performed to identify the proteins bound by RP11-159K7.2. SPSS 17.0 was used for statistical analysis. Results: The expression of RP11-159K7.2 in SNSCC tissue was significantly higher than that in adjacent tissues. RP11-159K7.2 expression was closely related with T grade, nodal metastasis and differentiation of SNSCC (χ2 value was 4.697, 4.235 and 10.753, respectively, all P<0.05). The five-year survival rate of RP11-159K7.2 high expression patients was significantly lower than that of RP11-159K7.2 low expression ones (P=0.013 7). After the down-regulation of RP11-159K7.2, the proliferation, migration and invasion ability of SNSCC cells decreased significantly, and the growth of SNSCC xenograft was significantly inhibited. There were 31 candidate proteins that may bind to RP11-159K7.2. RP11-159K7.2 directly bound to nuclear factor-κB (NF-κB) in SNSCC cells, and the regulation of RP11-159K7.2 on the proliferation and invasion of SNSCC cells depended on NF-κB. Conclusion: The increased expression of RP11-159K7.2 in SNSCC may serve as a potential molecular marker for SNSCC prognosis assessment. It is currently considered that the carcinogenic mechanism of RP11-159K7.2 in SNSCC is related to the regulation of NF-κB protein.

Antepenultimate residue at the C-terminus of NADPH oxidase RBOHD is critical for its function in the production of reactive oxygen species in Arabidopsis / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Production of reactive oxygen species (ROS) is a conserved immune response primarily mediated by NADPH oxidases (NOXs), also known in plants as respiratory burst oxidase homologs (RBOHs). Most microbe-associated molecular patterns (MAMPs) trigger a very fast and transient ROS burst in plants. However, recently, we found that lipopolysaccharides (LPS), a typical bacterial MAMP, triggered a biphasic ROS burst. In this study, we isolated mutants defective in LPS-triggered biphasic ROS burst (delt) in Arabidopsis, and cloned the DELT1 gene that was shown to encode RBOHD. In the delt1-2 allele, the antepenultimate residue, glutamic acid (E919), at the C-terminus of RBOHD was mutated to lysine (K). E919 is a highly conserved residue in NADPH oxidases, and a mutation of the corresponding residue E568 in human NOX2 has been reported to be one of the causes of chronic granulomatous disease. Consistently, we found that residue E919 was indispensable for RBOHD function in the MAMP-induced ROS burst and stomatal closure. It has been suggested that the mutation of this residue in other NADPH oxidases impairs the protein’s stability and complex assembly. However, we found that the E919K mutation did not affect RBOHD protein abundance or the ability of protein association, suggesting that the residue E919 in RBOHD might have a regulatory mechanism different from that of other NOXs. Taken together, our results confirm that the antepenultimate residue E is critical for NADPH oxidases and provide a new insight into the regulatory mechanisms of RBOHD.

Correlation between the expression of JARID1B/KDM5B in breast cancer tissues and the circulating tumor cells / 基础医学与临床

Objective To investigate the relation between expression of JARID1B/KDM5B in invasive breast cancer tissue and circulating tumor cells of invasive breast patients. Methods The S-P immunohistochemical method was used to observe the expression of JARID1B/KDM5B in lesions.imFISH method was used to detect circulation tumor cells. Results Twenty-seven cases of patients showed CTC positive(the number of CTC was more than or equal to 2) in 35 invasive breast cancer cases,The results of JARID1B/KDM5B expression were as follows:(-) (n=0) and (+) in 1 case,(++) in 3 cases,(+++) in 23 cases,8 cases of negative cases (the number of CTC < 2), JARID1B/KDM5B immune group of results:(-) (n=2),(+) in 2 cases,(++) in 1 case,(+++) in 3 cases, The positive relation was found in expression of JARID1B/KDM5B and circulating tumor cells(P<0.05). Conclu-sions JARID1B/KDM5B positive expression in tumor tissues has a certain significance in predicting the recurrence and metastasis of tumor.

Effect of aluminum exposure on cognitive function in electrolytic workers and its influential factors / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To clarify the effect of aluminum exposure on the cognitive function in electrolytic workers and the prevalence of mild cognitive impairment (MCI) among them by prevalence survey, and to investigate its influential factors.</p><p><b>METHODS</b>Sixty-six retired workers from the electrolysis workshop of an electrolytic aluminum plant were selected as an aluminum exposure group, while 70 retired workers from a flour mill in the same region were selected as a control group. MCI patients were screened out by Mini-Mental State Examination (MMSE); the blood aluminum level was measured by inductively coupled plasma-mass spectrometry; multivariate statistical analysis was used to investigate the influential factors for MMSE scores and the correlation between blood aluminum level and MCI prevalence.</p><p><b>RESULTS</b>The aluminum exposure group showed a significantly higher blood aluminum level than the control group (25.18 ± 2.65 µg/L vs 9.97 ± 2.83 µg/L, P < 0.01). The total MMSE score of the aluminum exposure group (26.13 ± 2.57) was significantly lower than that of the control group (27.89 ± 1.91) (P < 0.05), particularly the scores on time and place orientation, short-term memory, calculation ability, and language skill (P < 0.05). The detection rate of MCI was significantly higher in the aluminum exposure group (18.2%) than in the control group (5.7%) (P < 0.01). The main influential factors for MMSE scores were gender, age, education level, and blood aluminum level. The logistic regression analysis indicated that the MCI prevalence was significantly correlated with blood aluminum level in the study population (OR = 1.168, P < 0.01).</p><p><b>CONCLUSION</b>Long-term exposure to aluminum can cause cognitive disorders in electrolytic workers and may be one of the risk factors for MCI. Advanced age, male, low education level, and high blood aluminum level may be high-risk factors for cognitive impairment.</p>

Lipid peroxidation injury and endoplasmic reticulum stress in Al-induced apoptosis / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To study the role of lipid peroxidation injury and endoplasmic reticulum stress in Al-induced apoptosis.</p><p><b>METHODS</b>Neurons from 0-3 day rats were cultured and treated with different concentrations of AlCl3.6H2O. Morphologic changes of neurons and endoplasmic reticulum were observed under fluorescent and transmission electron microscope; activities of superoxide dismutase (SOD), malondialdehyde (MDA) and ATP enzymes were detected.</p><p><b>RESULTS</b>Typical morphologic changes in neurons apoptosis and endoplasmic reticulum were found under fluorescent and transmission electron microscope; SOD enzyme viability and ATP enzyme viability were significantly increased in the low-dosage group, but reduced in mid and high-dosage group (P < 0.01), whereas MDA levels decreased in the low-dosage group, but increased in mid and high-dosage group (P < 0.01).</p><p><b>CONCLUSION</b>Aluminum may induce neurons apoptosis, and lipid peroxidation injury in endoplasmic reticulum plays an important role in the apoptosis progression.</p>

The comparison of the effect of enalapril and indapamide on the peripheral blood pressure and central blood pressure through pulse wave analysis / 中华心血管病杂志

<p><b>OBJECTIVES</b>The purpose of this study was to evaluate the effects of the angiotensin-converting enzyme (ACE) inhibitor enalapril and diuretic indapamide on the peripheral blood pressure and the central blood pressure in Chinese patients with essential hypertension.</p><p><b>METHODS</b>This study was a double blind, randomized study. Informed consent were given by all patients. After 2 weeks of placebo run-in period, 105 patients with mild or moderate essential hypertension were randomized to receive either enalapril (10 mg per day) or indapamide (2.5 mg per day) for 8 weeks. Radial pulse wave recordings were performed in all the patients before the active treatments were given and at the end of the study. Only those patients who have finished 8 weeks of active treatment in both groups were included into the final analysis.</p><p><b>RESULTS</b>One hundred one patients (51 in enalapril group and 50 in indapamide group) completed the study. No significant difference (all P values > 0.05) was found in baseline data between the two groups. After 8 weeks of treatment, all the parameters of pulse wave (except heart rates in both groups and augmentation index in indapamide group) decreased significantly. Comparison of the 2 groups showed that there were no significant differences (all P values > 0.05) in all the parameters of pulse wave except that the central systolic blood pressure, augmentation and augmentation index were significantly lower in enalapril group than in indapamide group. In enalapril group, the reduced values of systolic blood pressure and pulse pressure in central aorta were significantly larger than those in brachial artery. However, the difference was not observed in indapamide group.</p><p><b>CONCLUSIONS</b>Enalapril and indapamide are both similarly effective in reducing peripheral arterial blood pressure. Moreover, enalapril is more effective in reducing central systolic pressure and augmentation index than indapamide. The difference is probably due to the reduction of wave reflection caused by enalapril.</p>