CD44+/CD24-细胞在乳腺癌组织及细胞系中的数量与分布

Objective To study the distribution and quantity of CD44VCD24- cells in breast cancer tissue and the cell lines,and as well as its correlation with the expression of various breast cancer markers and molecular subtyping of breast carcinoma.Methods The expression of CD44 / CD24,estrogen receptor,progesterone receptor,HER2,human estrogen-induced protein PS2,bcl-2 and nm23 in 60 cases of invasive ductal carcinoma of breast were studied by either single or double immunohistochemical staining.The co-expression of CD44 and CD24 in 3 breast cancer cell lines (MCF-7,MDA-MB-468,and MDA-MB- 231) was also examined.Results The quantity and distribution of CD44 + /CD24- cells varied greatly and no specific patterns were identified.The percentage of CD44 + /CD24- in breast cancer was 65%.The amount of CD44+/CD24- cells did not correlate with the age of patients,lymph node metastasis,tumor　 size,molecular subtypes and expression of various breast cancer markers in breast carcinoma.The proportion of CD44+/CD24- cells in MCF-7,MDA-MB-468,and MDA-MB-231 cell lines was < 1%,5% and > 80% ,respectively.Conclusions CD44+ /CD24- cells are demonstrated in certain breast cancer tissues and cell lines.However,there is no relationship obtained between the quantity or the distribution of these cells and the molecular subtyping or the clinicopathologic parameters in breast cancer.     

4-硒硫酸酯多糖的体内抗瘤作用

目的　观察 4-硒硫酸酯多糖 (Se-carra)的体内抗瘤作用。方法　于小鼠右腋皮下接种瘤细胞 2 4h后开始给药 ,连续 10天 ,观察其抑瘤率 ;小鼠腹腔接种肿瘤细胞前或接种后连续给药 10天 ,观察动物的生存时间。结果　 4-硒硫酸酯多糖能明显抑制肿瘤细胞的生长 ,延长小鼠的生存期。结论　 4-硒硫酸酯多糖体内给药有良好的抗瘤效果 ,值得进一步研究。     

新型冠状病毒感染相关急性黄斑区神经视网膜病变的神经眼科特征

目的：总结新型冠状病毒(SARS-CoV-2)感染相关急性黄斑区神经视网膜病变(AMN)的神经眼科特征。

方法：纳入2022-12-27/2023-02-01就诊于西安市第一医院(西北大学附属第一医院)神经眼科并经相关检查确诊为AMN的患者8例(6例女性,2例男性)共14眼纳入本次研究。所有患者病前均有SARS-CoV-2感染史。收集患者的临床资料。纳入最佳矫正视力(BCVA)、非接触间接眼压测定、眼底彩色照相、近红外成像(IR)、频域光学相干断层扫描(SD-OCT)、OCT血流成像(OCTA)、眼底荧光素血管造影(FFA)、吲哚菁绿血管造影(ICGA)、视野、视觉诱发电位(VEP)和视网膜电流图(ERG)检查结果。对纳入患者的神经眼科特征进行分析总结。

结果：纳入的8例患者年龄20-43(平均30±6.63)岁。病前3-11(平均5±3.51)d有SARS-CoV-2感染史,8例患者中有6例在感染SARS-CoV-2的5 d内出现视觉症状。患者的临床表现为视力下降或视物遮挡感; 纳入患者的视力0.08-1.0; 视野缺损表现为中心、旁中心暗点或合并周边暗点。VEP可见P100或P2峰时延迟; ERG提示视网膜感光细胞 功能受损。在疾病早期,SARS-CoV-2感染相关AMN患者可能存在视力、视野和视网膜外层病变大小及形状可能不匹配的情况,并发现视力越低,VEP峰时越迟。

结论：除眼底多模影像,SARS-CoV-2感染相关AMN的神经眼科特征需要临床医师关注,视功能及电生理可以辅助临床更加全面评估患者及判断预后。     

小脑组织移植的实验研究

应用不同胎龄的大鼠小脑组织(E_(15)和E_(18))植入受体鼠小脑,成活1～2个月后处死动物。光镜下观察移植物成活情况。移植物总成活率为35％。E_(15)成活率(60％)高于E_(18)(10％)。所有成活的移植物可根据细胞结构的特点易与受体脑组织区别,镜下可见到良好分化及成熟的神经细胞。     

前后路联合手术治疗髋臼双柱骨折疗效分析

目的:探讨前后路联合手术治疗髋臼双柱骨折的效果并分析影响疗效的相关因素。方法:2007年8月至2009年7月收治髋臼双柱骨折患者19例,男13例,女6例;年龄27～52岁,平均39.6岁。高位双柱骨折11例,低位双柱骨折8例,双柱骨折累及骶髂关节1例。受伤至手术时间4～11 d,平均5.8 d。患者均采用前后联合入路手术,重建钢板和螺钉内固定。结果:除1例死亡外本组全部获随访,随访时间12～18个月,平均13.6个月。关节功能根据Harris评分标准,术后功能优9例,良7例,可2例。结论:经前后路联合切开复位内固定治疗髋臼双柱骨折疗效满意。     

山西省41家医院胃癌住院日影响因素分析

目的了解胃癌患者住院日的影响因素,为医院及卫生主管部门管理决策提供参考依据。方法收集山西省41所三级医院2014年一季度胃癌患者出院首页数据,利用多重线性回归统计学方法,回顾性分析胃癌患者住院日与患者性别、年龄、地区、付费方式、伴随诊断数量、手术、医院类型7因素的相关性。结果不同性别组、年龄组、付费方式组住院日比较无统计学意义(t=0.210,P=0.834;F=1.342,P=0.252;2χ=5.945,P=0.312),是否手术、医院类型、伴随诊断数量、不同地区(Mann-Whitney检验)组住院日比较有统计学意义(2χ=52.489,P<0.001;2χ=32.924,P<0.001;t=-21.026,P<0.001;Z=-8.149,P<0.001)。结论医院加强手术患者的管理、严格把握手术适应症、优化手术患者诊疗流程设计与管理、开展与基层医院双向转诊服务等对降低患者住院日水平有帮助;同时,卫生主管部门应引导患者理性选择就医地点,不盲目追求名医名院,避免出现少数医院患者过度集中现象,这不仅可有效缓解患者看病难看病贵,而且对缩短患者住院日也有实际意义。     

Fractionated carbon dioxide (CO2) laser treatment contributes to trans-nail penetration of rhodamine B and changes of cytokine microenvironment

Lasers in Medical Science - This study is to determine the role of the fractional CO2 laser in topical drug delivery and the impact of local immune responses. Experimental rabbit nails were treated...     

A carbonised sieve-like corn straw cellulose–graphene oxide composite for organophosphorus pesticide removal

The development of efficient adsorbents for the removal of organophosphorus pesticides from water is a major challenge. In this work, we prepared an activated carbon derived from sieve-like cellulose/graphene oxide composites (ACCE/G) for the removal of several organophosphorus pesticides. We employed corn straw to produce a sieve-like cellulose–graphene oxide composite (CCE/G); then, by treating CCE/G with potassium hydroxide at high temperatures, the efficient adsorbent ACCE/G was prepared. The adsorption capacity of ACCE/G is higher than those of other sorbents, including a multi-wall carbon nanotube, graphitised carbon black, activated carbon, C18, and primary secondary amine adsorbent. The ACCE/G structure has been fully characterised via scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction and Brunauer–Emmett–Teller analysis. The maximum adsorption capacity of ACCE/G is 152.5 mg g⁻¹ for chlorpyrifos. The mechanism, the thermodynamic properties, and the kinetics of the adsorption process have been investigated as well. Our findings demonstrate that the adsorption mechanism depends on the electron-donating abilities of the S and P atoms. Moreover, the Langmuir model gives the best fit for the isotherm data, and the adsorption efficiency of the ACCE/G is still over 80% after eight times of recycling, making ACCE/G a valuable candidate for the removal of OPPs.

Synthesizing a reusable adsorbent from waste corn straw is a sustainable way to utilize secondary resources and purify water.     

Combined spectroscopy methods and molecular simulations for the binding properties of trametinib to human serum albumin

Trametinib is a novel anticancer drug for treating metastatic cutaneous melanoma. The present study probed into the binding of trametinib to human serum albumin (HSA) through spectroscopy methods and molecular simulations. Trametinib could quench the fluorescence of HSA through static quenching which could be probed via fluorescence spectroscopy and time-resolved fluorescence. Thermodynamic parameters and docking results indicated that hydrogen bonds and van der Waals forces play crucial roles in this binding process, which exerts almost no effect on the HSA conformation under synchronous fluorescence, three-dimensional fluorescence, circular dichroism spectra, and molecular dynamics simulations. Site marker displacement experiments and molecular docking reveal that trametinib primarily binds to Sudlow site I of HSA. In addition, the trametinib–HSA interaction was hardly influenced by varying amino acid (glutamine, alanine, glycine, and valine) concentrations. This study can provide useful information for the pharmacokinetic properties of trametinib.

Probing the binding properties of trametinib to human serum albumin.