Staphylococcus aureus, or methicillin-resistant S. aureus (MRSA), is a significant pathogen in both nosocomial and community infections. Community-associated MRSA (CA-MRSA) strains tend to be multi-drug resistant and to invade hospital settings. This study aimed to assess the antimicrobial resistance and molecular characteristicsof nasal S. aureus among newlyadmitted inpatients.In the present study, 66 S. aureus isolates, including 10 healthcare-associated MRSA (HA-MRSA), 8 CA-MRSA, and 48 methicillin-sensitive S. aureus (MSSA) strains, were found in the nasal cavities of 62 patients by screening 292 newlyadmitted patients. Antimicrobial resistance and molecular characteristics of these isolates, including spa-type, sequence type (ST) and SCCmec type, were investigated. All isolates were sensitive to linezolid, teicoplanin, and quinupristin/dalfopristin, but high levels of resistance to penicillin and erythromycin were detected. According to D-test and erm gene detection results, the cMLSB and iMLSB phenotypes were detected in 24 and 16 isolates, respectively. All 10 HA-MRSA strains displayed the cMLSB phenotypemediated by ermA or ermA/ermC, while the cMLSB CA-MRSA and MSSA strains carried the ermB gene. Molecular characterization revealedall 10 HA-MRSA strains were derived from the ST239-SCCmec III clone, and four out of eight CA-MRSA strains were t437-ST59-SCCmec V. The results suggest that patients play an indispensable role in transmitting epidemic CA-MRSA and HA-MRSA strains.
Anti-Bacterial Agents/*pharmacology ; Bacterial Proteins/genetics ; Drug Resistance, Multiple, Bacterial/genetics ; Humans ; Inpatients ; Methicillin-Resistant Staphylococcus aureus/*drug effects/genetics/isolation & purification ; Methyltransferases/genetics ; Microbial Sensitivity Tests ; Nasal Cavity/*microbiology ; Staphylococcal Infections/diagnosis/microbiology ; Staphylococcus aureus/*drug effects/genetics/isolation & purification

Objective To observe the improving effect of Hypericum Perforatum L Extracts (HPLES)on depression induced by chronic unpredictable mild stress in mice. Methods The depression model was established by the method of chronic unpredictable mild stress. Fifty depression model mice were divided into model control group,fluoxetine hydrochloride group (2. 6 mg / kg),Hypericum perforatum ex-tract low,medium and high (0. 2 g / kg,0. 4 g / kg,0. 8 g / kg) dose groups according to the random num-ber table method. Another 10 normal mice matched with body weight were taken as the normal control group. The mice in normal control group and the model control group were given pure water by gavage every day,and the mice in other groups were given corresponding solution by gavage for 4 weeks. In addition to the normal control group,the mice in other groups continued to undergo chronic unpredictable mild stress during gavage. The sugar water preference test and forced swimming test were performed after the last administration. Blood samples were collected from the posterior orbital venous plexus,and the levels of dopamine (DA) and brain-derived neurotrophic factor (BDNF) were measured by Elisa. The hippocampal tissues of mice were exam-ined by HE staining. Results Compared with the normal control group,the body mass of mice in the model control group decreased significantly at the first,second,third and fourth weeks ( t=2. 739,4. 162,4. 082, 3. 957;all P<0. 05). At the first,second,third and fourth weeks,the body mass of mice in the low,middle and high dose group of Hypericum perforatum extract were not significantly different from those in the model control group (all P>0. 05). Compared with the normal control group,the sugar water preference index of mice in the model control group was significantly reduced((61. 3± 4. 5)%,(52. 6± 5. 2)%; t=2. 721,P<0. 05),the swimming immobility time was prolonged(( 44. 3± 20. 00) s,(101. 8± 50. 8) s;t=2. 939,P<0. 05),the difference were statistically significant. Compared with the model control group,the sugar water preference index of mice in the low,middle and high dose group of Hypericum perforatum extract increased ((61. 8±4. 7)%,(65. 2±4. 1)%,(62. 6±5. 6)%,t=-3. 005,5. 073,-2. 928,all P<0. 05),the swimming immobility time decreased ((47. 2±17. 9) s,(54. 8±50. 3) s,(61. 3±44. 2) s; t=2. 803,1. 921,1. 903,all P<0. 05). The results of Elisa showed that compared with the normal control group,the levels of serum DA and BDNF of mice in the model control group were significantly lower (t=3. 031,8. 507,all P<0. 05); com-pared with the model control group,the levels of serum DA of mice in the low dose and high dose group of Hypericum perforatum were significantly higher (t=5. 025,3. 414,P<0. 05),and the serum BDNF of mice in the high dose group of Hypericum perforatum was also significantly higher (t=6. 098,P<0. 05),the differ-ence was statistically significant. HE staining showed that compared with the normal control group,the neu-rons in CA3 area of hippocampus in the model control group mice were seriously damaged,suggesting the es-tablishment of the mouse model. Compared with the model control group,the atrophy and degeneration of hippocampal CA3 cells in the three dose groups were significantly reduced. The atrophy and deformation of hippocampal CA3 neurons in the low,middle and high dose groups of Hypericum perforatum extract were re-lieved. Conclusion HPLES have obvious improving and antidepressant effects on the depression model mice induced by chronic unpredictable stress. The above effects may be related to the improvement of serum DA,DBNF level and reduce neuronal damage in CA3 area.

ObjectiveTo compare the effects of total alkaloids， matrine， and sophoridine extracted from Sophora alopecuroides on the activity of pheochromocytoma cells （PC12 cells）. MethodThe effect of S. alopecuroides total alkaloids， matrine， and sophoridine at concentrations of 2， 1， 0.5， 0.25， 0.125， and 0.062 5 g·L^-1 on the proliferation of PC12 cells was evaluated using the 3-（4，5-dimethylthiazol-2-yl）-2，5-diphenyl tetrazolium bromide （MTT） assay. The lactate dehydrogenase （LDH） leakage rate was measured by enzyme-linked immunosorbent assay （ELISA）. Flow cytometry was used to assess cell apoptosis rate， cell cycle distribution， and intracellular Ca²⁺ levels. Real-time quantitative polymerase chain reaction （Real-time PCR） was performed to determine the mRNA transcription levels of B-cell lymphoma-2 （Bcl-2） and Bcl-2-associated X protein （Bax）. Protein expression levels of apoptosis-related proteins Caspase-3， Caspase-8， Bcl-2， and Bax were detected by Western blot. ResultCompared to the control group， S. alopecuroides total alkaloids， matrine， and sophoridine inhibited the proliferation of PC12 cells， increased LDH leakage rate， enhanced intracellular Ca²⁺ fluorescence intensity， and induced cell apoptosis in concentration-dependent manner （P<0.05， P<0.01）. Among them， S. alopecuroides total alkaloids had the strongest inhibitory effect on cell proliferation and induction of apoptosis in PC12 cells （P<0.01）. After treatment with S. alopecuroides total alkaloids， matrine， and sophoridine， the cell cycle progression of PC12 cells was arrested at G₁/G₀ in the S. alopecuroides total alkaloids group， and at G₁/S in the matrine and sophoridine groups. The expression levels of Bax mRNA were significantly increased （P<0.05， P<0.01）， while the expression levels of Bcl-2 mRNA were significantly decreased （P<0.05， P<0.01）. All treatments significantly downregulated the expression of the anti-apoptotic protein Bcl-2 （P<0.05， P<0.01） and upregulated the expression of the pro-apoptotic proteins Bax， Caspase-3， and Caspase-8 （P<0.05， P<0.01）， with the most significant protein expression changes observed in the S. alopecuroides total alkaloids group. ConclusionAmong the S. alopecuroides total alkaloids， matrine， and sophoridine， S. alopecuroides total alkaloids exhibit the strongest inhibitory effect on the activity of PC12 cells， and its mechanism of action may be related to the inhibition of anti-apoptotic protein expression， upregulation of pro-apoptotic protein expression， and activation of the mitochondrial Caspase-8 apoptotic pathway.

【Objective】 To explore the application value of free prostate specific antigen density(fPSAD) based on rectal ultrasound in the prediction of prostate biopsy results. 【Methods】 Data of 578 patients undergoing transrectal ultrasound guided prostate biopsy during Jan.2014 and Jul.2021 were retrospectively analyzed, including prostate specific antigen(PSA) level, free prostate specific antigen(fPSA) level, fPSA/total prostate specific antigen(tPSA), prostate specific antigen density(PSAD), combined prostate specific antigen density(cPSAD), fPSAD, prostate volume and other clinical parameters. 【Results】 There were 253 cases of prostate cancer and 325 cases of prostatic hyperplasia. The positive puncture rate was 43.8%. The critical value of fPSAD was 0.05, the corresponding area under receiver operating characteristic (ROC) curve was 0.830, and the Yoeden index was 0.539. The sensitivity, specificity, diagnosis accordance rate and Kappa value of fPSAD to predict prostate cancer were 0.76, 0.77, 76.7% and 0.529, respectively. Compared with PSA, fPSA/tPSA and PSAD, PSA had the highest sensitivity (92.5%), fPSAD had the highest specificity (77.2%), and fPSAD had the highest diagnostic accordance rate (76.7%). 【Conclusion】 When transrectal prostate volume measurement is used to predict prostate cancer, fPSAD has relatively high specificity and diagnosis accordance rate, which is obviously better than using PSA, fPSA/tPSA ratio and PSAD alone in the differential diagnosis and prediction of prostate cancer and prostatic hyperplasia.

Objective: To observe the improving effect of Hypericum Perforatum L Extracts (HPLES)on depression induced by chronic unpredictable mild stress in mice. Methods: The depression model was established by the method of chronic unpredictable mild stress. Fifty depression model mice were divided into model control group, fluoxetine hydrochloride group (2.6 mg / kg), Hypericum perforatum extract low, medium and high (0.2 g / kg, 0.4 g / kg, 0.8 g / kg) dose groups according to the random number table method. Another 10 normal mice matched with body weight were taken as the normal control group. The mice in normal control group and the model control group were given pure water by gavage every day, and the mice in other groups were given corresponding solution by gavage for 4 weeks. In addition to the normal control group, the mice in other groups continued to undergo chronic unpredictable mild stress during gavage.The sugar water preference test and forced swimming test were performed after the last administration. Blood samples were collected from the posterior orbital venous plexus, and the levels of dopamine (DA) and brain-derived neurotrophic factor (BDNF) were measured by Elisa. The hippocampal tissues of mice were examined by HE staining. Results: Compared with the normal control group, the body mass of mice in the model control group decreased significantly at the first, second, third and fourth weeks (t=2.739, 4.162, 4.082, 3.957; all P<0.05). At the first, second, third and fourth weeks, the body mass of mice in the low, middle and high dose group of Hypericum perforatum extract were not significantly different from those in the model control group (all P>0.05). Compared with the normal control group, the sugar water preference index of mice in the model control group was significantly reduced((61.3±4.5)%, (52.6±5.2)%; t=2.721, P<0.05), the swimming immobility time was prolonged((44.3±20.00) s, (101.8±50.8) s; t=2.939, P<0.05), the difference were statistically significant. Compared with the model control group, the sugar water preference index of mice in the low, middle and high dose group of Hypericum perforatum extract increased((61.8±4.7)%, (65.2±4.1)%, (62.6±5.6)%, t=-3.005, 5.073, -2.928, all P<0.05), the swimming immobility time decreased ((47.2±17.9) s, (54.8±50.3) s, (61.3±44.2) s; t=2.803, 1.921, 1.903, all P<0.05). The results of Elisa showed that compared with the normal control group, the levels of serum DA and BDNF of mice in the model control group were significantly lower (t=3.031, 8.507, all P<0.05); compared with the model control group, the levels of serum DA of mice in the low dose and high dose group of Hypericum perforatum were significantly higher (t=5.025, 3.414, P<0.05), and the serum BDNF of mice in the high dose group of Hypericum perforatum was also significantly higher (t=6.098, P<0.05), the difference was statistically significant. HE staining showed that compared with the normal control group, the neurons in CA3 area of hippocampus in the model control group mice were seriously damaged, suggesting the establishment of the mouse model. Compared with the model control group, the atrophy and degeneration of hippocampal CA3 cells in the three dose groups were significantly reduced. The atrophy and deformation of hippocampal CA3 neurons in the low, middle and high dose groups of Hypericum perforatum extract were relieved. Conclusion HPLES have obvious improving and antidepressant effects on the depression model mice induced by chronic unpredictable stress.The above effects may be related to the improvement of serum DA, DBNF level and reduce neuronal damage in CA3 area.

目的：探讨沉默 G 蛋白偶联受体激酶 3（G protein-coupled receptor kinase 3，GRK3）对口腔鳞状细胞癌（oral squamous cell carcinoma，OSCC）细胞增殖、迁移和侵袭的影响及其可能的机制。方法：利用 Oncomine 数据库分析 GRK3 在正 常口腔组织及 OSCC 组织中的表达水平。用 RNA 干扰技术敲降 GRK3 在 OSCC 细胞 WSU-HN6 和 CAL27 中的表达，用 qPCR 法验证干扰效率后，采用 CCK-8 法和流式细胞术分别检测敲降 GRK3 对 OSCC 细胞增殖和凋亡的影响，Transwell 小室 法检测对 OSCC 细胞迁移、侵袭能力的影响，qPCR 法检测对 OSCC 细胞周期、上皮间质转化（epithelial to mesenchymal transition，EMT）和基质金属蛋白酶（matrix metallopeptidase，MMP）相关分子 mRNA 水平表达的影响，WB 法检测 EMT 及 MMP 相关分子的蛋白表达水平变化。结果：OSCC 组织中 GRK3 的表达水平显著高于正常口腔组织（P<0.01）。转染 si-GRK3 后，OSCC 细胞中 GRK3 mRNA 表达水平均下调 70% 以上。敲降 GRK3 可显著抑制 OSCC 细胞的增殖、迁移和侵袭能力（均 P<0.01），对细胞凋亡无显著影响（P>0.05）。敲降 GRK3 表达后，OSCC 细胞的 G0/G1 期比例显著增高（t=5.799，P<0.01），细胞 周期蛋白 D1（Cyclin D1）、Cyclin D3、周期蛋白依赖性激酶 2（cyclin-dependent kinases 2，CDK2）和 CDK4 基因的 mRNA 表达降 低（均 P<0.05）；EMT 相关分子波形蛋白（Vimentin）、Zeb1 和 Slug 表达降低，E-钙黏蛋白（E-Cadherin）表达升高（均 P<0.05）； MMP3 和 MMP9 表达降低（均 P<0.05），MMP2 和 MMP7 表达无明显变化（均 P>0.05）。结论：GRK3 可通过调节细胞周期促 进 OSCC 细胞的增殖能力，并通过调控 EMT 和 MMP 增强细胞的迁移和侵袭能力。

【Objective】 To study the metabolism and morphology changes of platelets in vitro using traditional Chinese medicine named Qingkailing injection as the additive solution, and to explore the viability of Qingkailing in the extension of platelet storage. 【Methods】 Apheresis platelets, adding 1% final concentration of Qingkailing injection, were taken as experiment groups, and sampled on 1, 3, 5, 8, 10 and 14 days(6 time points)of storage. Apheresis platelets without adding Qingkailing injection were taken as the control, and sampled on 1, 3 and 5 days(3 time points)of storage. The platelet count, morphology scores, biochemical parameters, pH and response rate of hypotonic shock during agitated storage(22 ℃) were tested. 【Results】 1) No significant change in platelet count was noticed in both experimental group(within 14 days) and the control(within 5 days)(P>0.05). The MPV and PDW of both groups increased at any sampling time within 5 days(P<0.05). 2) The morphology score of experimental groups and the control all decreased within the storage period(P<0.05), but its decrease of the control was greater than that of the experimental groups, especially on day 8(P<0.05). 3)Glucose, lactate dehydrogenase, lactate, Na⁺, and K⁺ values increased or decreased in varying degrees(P<0.05), while Cl^- value stayed almost the same during 14 days(P>0.05). Glucose, lactate dehydrogenase, lactate and Na⁺ value changed significantly in the control within 5 days(P<0.05), while K⁺ and Cl^- value did not(P>0.05). Within 5-day storage, the glucose consumption, lactate dehydrogenase and lactate generation in the control were significantly greater than those in experimental groups(P<0.05), but the added value of Na⁺, K⁺ and Cl^- showed no significant difference(P>0.05). 4) pH value, relative to the baseline of day 1, decreased in both groups within 5 days, and its decreasing trend was significant in the control (P<0.05), but not in the experimental group(P>0.05). No significant difference was noticed in the response rate of hypotonic shock in experimental groups within 8 days, while significant decrease was noticed in the control within 5days(P<0.05). The response rate of hypotonic shock in experimental groups were significantly higher than that in the control on day 3 and day 5(P<0.05). 【Conclusion】 The comparison of apheresis platelets, stored in vitro, in terms of platelet count, morphology scores, biochemical parameters, pH and response rate of hypotonic shock showed that platelets, adding 1% final concentration of Qingkailing injection, could prolong the platelet storage to at least 10 days in vitro.

Hyperuricemic nephropathy （HN）， a secondary renal damage common in clinical practice， is characterized by early concealing and continuous progression. The understanding of HN in traditional Chinese medicine （TCM） is from a macroscopic perspective. According to the TCM theory， HN is caused by the combination of external pathogens and internal injuries， with the main pathogenesis being root deficiency combined with superficial excess and deficiency-excess in complexity. In western medicine， the understanding of HN is from the microscopic perspective， which holds that the occurrence of HN is the result of inflammation， oxidative stress， renin-angiotensin-aldosterone system （RAAS） activation， and metabolic abnormalities. The TCM syndromes of HN include internal dampness and heat， obstruction in dampness and turbidity， deficiency of spleen and kidney， and deficiency of kidney yin. Accordingly， the prescriptions should clear heat and dampness， remove dampness and turbidity， tonify spleen and kidney， and nourish kidney yin， respectively. In addition to TCM prescriptions， single herbal medicines and their extracts， Chinese patent medicines， and external applications of Chinese medicines have played a significant role in the treatment of HN， promoting the application of TCM in the treatment of HN. Moreover， the integrated traditional Chinese and western medicine has also played a role in the treatment of HN， enriching the treatment schemes of HN. Different from common kidney diseases such as acute and chronic glomerulonephritis and nephrotic syndrome， HN with particularity should be carefully differentiated in clinical practice. This article systematically summarizes the research progress in the treatment of traditional Chinese medicine and integrated traditional Chinese and western medicine on hyperuricemic nephropathy with TCM and integrated traditional Chinese and western medicine， aiming to enrich the system and theory of HN treatment and further guide the clinical practice.