Microarray Study of Mechanism of Trichostatin A Inducing Apoptosis of Molt-4 Cells

Histone deacetylase was overexpressed in a variety of cancers and was closely correlated with oncogenic factors. The histone deacetylase inhibitor, trichostatin A （TSA） was shown to induce apoptosis in many cancer cells. However, the mechanism of TSA on induction of cancer cells apoptosis is poorly understood. This study was designed to characterize the global gene expression profiles before and after treatment of human leukemia cell line Molt-4 with TSA. Flow cytometry, MTT and DNA ladder were used to observe the effect of TSA on the apoptosis of MOLT-4 cells and normal human peripheral blood mononuclear cells （PBMC）. Microarray, reverse transcription-polymerase chain reaction （RTopCR） and Western blotting were used to detect the difference of gene and protein expressions of Molt-4 cells after incubation of the cells with TSA. The results showed that TSA could induce Molt-4 apoptosis in dose- and time-dependent manners but spared PBMCs. Microarray analysis showed that after incubation with TSA for 9 h, 310 genes were upregulated and 313 genes were deregulated. These genes regulate the growth, differentiation and survival of cells. Among these genes, STATSA was down-regulated by 80.4% and MYC was down-regulated by 77.3%. It was concluded that TSA has definite growth-inhibiting and apoptosis-inducing effects on Molt-4 cells in time- and dose-dependent manners, with weak cytotoxic effects on PBMCs at the same time. The mechanism of TSA selectively inducing apoptosis and inhibiting growth may be ascribed to the changes of pro-proliferation genes and anti-apoptosis genes.

Effects of Trichostatin A on HDAC8 Expression,Proliferation and Cell Cycle of Molt-4 Cells

The effects of Trichostatin A （TSA） on histone deacetylase 8 （HDAC8） expression, proliferation and cell cycle arrest in T-lymphoblastic leukemia cell line Molt-4 cells in vitro were investigated. The effect of TSA on the growth of Molt-4 cells was studied by MTT assay. Flow cytometry was used to examine the cell cycle. The expression of HDAC8 was detected by using immunocytochemistry and Western blot. The results showed that proliferation of Molt-4 cells was inhibited in TSA-treated group in a time- and dose-dependent manner, The IC50 of TSA exposures for 24 h and 36 h were 254.3236 and 199.257 μg/L respectively. The cell cycle analysis revealed that Molt-4 was mostly in G0/G1 phase, and after treatment with TSA from 50 to 400 μg/L for 24 h, the percents of G0/G1 cells were decreased and cells were arrested in GJM phase. Treatment of TSA for 24 h could significantly inhibit the expression of HDAC8 protein in Molt-4 cells （P〈0.01）. It was concluded that TSA could decrease the expression of HDAC8 in Molt-4 cells, which contributed to the inhibition of proliferation and induction of cell cycle arrest in Molt-4 cells.

Dual effect of Molt-4 cell line onset with roscovitine

Objective:To observe the effect of roscovitine(ROSC)as some Cyclin-dependent kinases(CDKs),inhibitor onset with the Molt-4 cell lines.Methods:DNA assay of single cells by flow cytometry was used to detect the effect of cell cycle arrest and Annexin-V/FITC assay was used to detect the effect of cell apoptosis when the Molt-4 cell lines cultured with different concentration ROSC in different time points.Results:It showed that ROSC exerted strong inhibitory effect on prolif- eration and cell cycle progression of Molt-4 cell lines,accumulation of G2/M cells arrested took place after onset with 10μm and 20μm ROSC more than 6 h;at the same time,the cell apoptosis of Molt-4 cells would be detected.According with the time and concentration increasing,the cell apoptosis rate would rise.Conclusion:It is concluded that Roscovitine(ROSC) as some Cyclin-dependent kinases(CDKs),inhibitor,has dual effects to Molt-4 cells,not only the effect of cell cycle arrest but also the effect of cell apoptosis.

Chemokine platelet factor 4 accelerates peripheral nerve regeneration by regulating Schwann cell activation and axon elongation

Schwann cells in peripheral nerves react to traumatic nerve injury by attempting to grow and regenerate.Howeve r,it is unclear what factors play a role in this process.In this study,we searched a GEO database and found that expression of platelet factor 4 was markedly up-regulated after sciatic nerve injury.Platelet factor is an important molecule in cell apoptosis,diffe rentiation,survival,and proliferation.Further,polymerase chain reaction and immunohistochemical staining confirmed the change in platelet factor 4 in the sciatic nerve at different time points after injury.Enzyme-linked immunosorbent assay confirmed that platelet factor 4 was secreted by Schwann cells.We also found that silencing platelet factor 4 decreased the proliferation and migration of primary cultured Schwann cells,while exogenously applied platelet factor 4 stimulated Schwann cell prolife ration and migration and neuronal axon growth.Furthermore,knocking out platelet factor 4 inhibited the prolife ration of Schwann cells in injured rat sciatic nerve.These findings suggest that Schwann cell-secreted platelet factor 4 may facilitate peripheral nerve repair and regeneration by regulating Schwann cell activation and axon growth.Thus,platelet factor 4 may be a potential therapeutic target for traumatic peripheral nerve injury.

Enhancing the crystallinity and stability of perovskite solar cells with 4-tert-butylpyridine induction for efficiency exceeding 24%

Perovskite solar cells(PSCs)have emerged as a promising photovoltaic technology because of their high light absorption coefficient,long carrier diffusion distance,and tunable bandgap.However,PSCs face challenges such as hysteresis effects and stability issues.In this study,we introduced a novel approach to improve film crystallization by leveraging 4-tert-butylpyridine(TBP)molecules,thereby enhancing the performance and stability of PSCs.Our findings demonstrate the effective removal of PbI_(2)from the perovskite surface through strong coordination with TBP molecules.Additionally,by carefully adjusting the concentration of the TBP solution,we achieved enhanced film crystallinity without disrupting the perovskite structure.The TBP-treated perovskite films exhibit a low defect density,improved crystallinity,and improved carrier lifetime.As a result,the PSCs manufactured with TBP treatment achieve power conversion efficiency(PCE)exceeding 24%.Moreover,we obtained the PCE of 21.39%for the 12.25 cm^(2)module.

Induced neural stem cells regulate microglial activation through Akt-mediated upregulation of CXCR4 and Crry in a mouse model of closed head injury

Microglial activation that occurs rapidly after closed head injury may play important and complex roles in neuroinflammation-associated neuronal damage and repair.We previously reported that induced neural stem cells can modulate the behavior of activated microglia via CXCL12/CXCR4 signaling,influencing their activation such that they can promote neurological recovery.However,the mechanism of CXCR4 upregulation in induced neural stem cells remains unclear.In this study,we found that nuclear factor-κB activation induced by closed head injury mouse serum in microglia promoted CXCL12 and tumor necrosis factor-αexpression but suppressed insulin-like growth factor-1 expression.However,recombinant complement receptor 2-conjugated Crry(CR2-Crry)reduced the effects of closed head injury mouse serum-induced nuclear factor-κB activation in microglia and the levels of activated microglia,CXCL12,and tumor necrosis factor-α.Additionally,we observed that,in response to stimulation(including stimulation by CXCL12 secreted by activated microglia),CXCR4 and Crry levels can be upregulated in induced neural stem cells via the interplay among CXCL12/CXCR4,Crry,and Akt signaling to modulate microglial activation.In agreement with these in vitro experimental results,we found that Akt activation enhanced the immunoregulatory effects of induced neural stem cell grafts on microglial activation,leading to the promotion of neurological recovery via insulin-like growth factor-1 secretion and the neuroprotective effects of induced neural stem cell grafts through CXCR4 and Crry upregulation in the injured cortices of closed head injury mice.Notably,these beneficial effects of Akt activation in induced neural stem cells were positively correlated with the therapeutic effects of induced neural stem cells on neuronal injury,cerebral edema,and neurological disorders post–closed head injury.In conclusion,our findings reveal that Akt activation may enhance the immunoregulatory effects of induced neural stem cells on microglial activation via upregulation of CXCR4 and Crry,thereby promoting induced neural stem cell–mediated improvement of neuronal injury,cerebral edema,and neurological disorders following closed head injury.

Ⅰ群4型禽腺病毒Y17215-1株体外增殖规律及免疫原性研究

为探讨禽腺病毒4型分离株Y17215-1的体外增殖特性和免疫原性,本研究以LMH细胞为模型,摸索Y17215-1株最佳接种剂量和收获时间;通过活毒滴鼻接种和灭活疫苗肌肉注射的方式免疫SPF鸡,测定其免疫原性。结果显示:Y17215-1株0.1 MOI接种LMH细胞,培养48~72 h病毒滴度达到峰值108.625 TCID_(50)/mL。该病毒经肌肉注射对42日龄SPF鸡具有较强致病性,LD_(50)为103.000 TCID_(50)/0.2 mL。以10^(7.676) TCID_(50)的Y17215-1株滴鼻免疫21日龄SPF鸡,免疫后7 d 100%试验鸡产生中和抗体,14 d达到高峰。以Y17215-1株制备灭活疫苗肌肉注射免疫21日龄SPF鸡(10^(7.676) TCID_(50)/羽),免疫后7 d 70%试验鸡产生中和抗体,21 d达到高峰。在免疫后21 d用1000LD_(50)的Y17215-1株进行攻毒,活毒和灭活疫苗的保护率均为100%。以上结果表明:Y17215-1株具有很好的体外增殖特性和免疫原性,可以作为候选疫苗毒株。

神经调节蛋白4对2型糖尿病小鼠主动脉内皮细胞凋亡的影响

目的探讨神经调节蛋白4(Nrg4)对2型糖尿病小鼠主动脉内皮细胞凋亡的影响。方法将C57小鼠分为对照(Vehicle)组、糖尿病(DM)组和Nrg4干预糖尿病小鼠(Nrg4)组。Nrg4组腹腔注射Nrg4重组蛋白(100μg/kg,3次/周),Vehicle组与DM组小鼠注射等量生理盐水,干预周期均为8周。实验结束后,TUNEL荧光染色检测主动脉内皮细胞凋亡,Western blot检测主动脉内皮组织凋亡相关蛋白Bax、Bcl-2及Cleaved-caspase 3的表达。结果与Vehicle组相比,DM组主动脉内皮细胞凋亡率明显升高[(33.0±5.4)%vs.(20.5±3.0)%;P<0.05],促凋亡蛋白Bax与凋亡执行蛋白Cleaved-caspase 3表达明显增多,抗凋亡蛋白Bcl-2表达显著减少(P<0.05);而Nrg4干预明显抑制糖尿病小鼠主动脉内皮细胞凋亡[(19.2±3.8)%vs.(33.0±5.4)%;P<0.05],降低Bax与Cleaved-caspase 3的表达并促进Bcl-2表达(P<0.05)。结论Nrg4干预能缓解2型糖尿病小鼠主动脉内皮细胞凋亡。

PDCD4和miR-107在阴茎癌组织中的表达及与患者预后的关系

目的:探究程序性细胞死亡因子4(PDCD4)及微小RNA-107(miR-107)在阴茎癌组织中的表达水平及与患者预后的关系。方法:选取2018年01月至2020年06月经本院确诊阴茎癌并行手术治疗患者32例,术中分别取患者阴茎癌组织(研究组)及癌旁正常阴茎组织(对照组)各32对,应用实时定量PCR(quantitative reverse transcription-PCR)检测两组PDCD4和miR-107的表达水平并分析其与临床病理参数及预后的关系,并采用Kaplan-Meier进行生存曲线分析及Logistic回归分析影响阴茎癌患者预后的因素。结果:研究组PDCD4表达量明显低于对照组,miR-107表达量明显高于对照组(P均<0.05);PDCD4和miR-107的表达与阴茎癌患者淋巴结转移、组织分级相关(P均<0.05),与年龄、吸烟史、饮酒史、肿瘤部位无关(P均>0.05);应用Kaplan-Meier法对生存率进行分析,miR-107低表达组生存率显著高于miR-107高表达组,PDCD4低表达组生存率低于PDCD4高表达组(P均<0.05)。多因素分析结果显示,TNM分期高、淋巴结转移、PDCD4低表达和miR-107高表达均是影响阴茎癌患者预后的独立危险因素(均P<0.05)。结论:阴茎癌患者miR-107呈异常高表达,PDCD4呈低表达,二者均是影响阴茎癌的独立危险因素且有望作为预测阴茎癌患者预后的重要指标。

胃癌患者术前血清CA72-4、CYFRA21-1水平与生存预后的关系

目的 通过研究不同肿瘤标志物水平、不同病理状态下胃癌患者的预后生存情况,找到影响患者生存预后的危险因素。方法 收集2018年12月至2021年1月在解放军总医院第一医学中心行手术治疗的164例胃癌患者临床资料,并随访患者生存情况,分析影响胃癌患者生存的风险因素。结果 生存时间≤2年的胃癌患者血清CYFRA21-1、PGII水平明显高于生存时间>2年组,差异具有统计学意义(P=0.002、0.023)。胃癌患者在CA72-4≤10U/mL、CYFRA21-1≤4.0ng/mL、TNM分期为I+II期、Lauren分型为肠型、非印戒细胞癌中1、2、3年生存率较高,在CA72-4>10U/mL、CYFRA21-1>4.0ng/mL、TNM分期为III+IV期、Lauren分型为弥散型、印戒细胞癌中生存率较低,差异具有统计学意义(P=0.0001、0.0007、<0.0001、<0.0001、0.0002)。血清CA72-4、CYFRA21-1水平、印戒细胞癌、TNM分期是影响胃癌患者生存的风险因素(P=0.001、<0.001、<0.001、<0.001)。结论 血清高CA72-4、CYFRA21-1水平、印戒细胞癌、TNM分期较晚是胃癌患者生存预后的风险因素。

外周血CD4^(+)PD-1^(+)Tcells及CD4^(+)T淋巴细胞ATP含量与复发性卵巢癌疗效的相关性分析

目的 探讨外周血CD4^(+)程序性细胞死亡受体-1(PD-1)^(+)T cells及CD4^(+)T淋巴细胞三磷酸腺苷(ATP)含量与复发性卵巢癌疗效的相关性。方法 选取30例复发性卵巢癌患者为复发组,30例未复发卵巢癌患者为非复发组;另选取30名同期体检健康者作为对照组。评估外周血CD4^(+)PD-1^(+)T cells及CD4^(+)T淋巴细胞ATP含量与复发性卵巢癌疗效的相关性。结果 复发组和非复发组的CD4^(+)PD-1^(+)T cells较对照组明显升高(P<0.05)。复发组和非复发组的CD4^(+)T淋巴细胞ATP含量较对照组明显降低(P<0.05)。复发组治疗后CD4^(+)PD-1^(+)Tcells显著低于治疗前(P<0.05),治疗后CD4^(+)T淋巴细胞ATP含量显著高于治疗前(P<0.05)。CD4^(+)PD-1^(+)T cells与复发性卵巢癌疗效成负相关(r=-0.393,P=0.039),CD4^(+)T淋巴细胞ATP含量与复发性卵巢癌疗效成正相关(r=0.449,P=0.031)。结论 复发性卵巢癌患者外周血CD4^(+)PD-1^(+)T cells及CD4^(+)T淋巴细胞ATP含量与疗效密切相关。

非小细胞肺癌组织中CLDN10和CSPG4水平表达与临床病理特征及预后的关系研究

目的探讨非小细胞肺癌(non-small cell lung cancer,NSCLC)组织中紧密连接蛋白10(claudin 10,CLDN10)和硫酸软骨素蛋白聚糖4(chondroitin sulfate proteoglycan 4,CSPG4)表达与临床病理特征和预后的关系。方法随机选取2017年1月~2018年4月于南京医科大学附属泰州市人民医院进行手术的136例NSCLC患者为研究对象,并根据随访结局(生存或死亡)分为生存组(n=63)和死亡组(n=69)。收集136例患者于手术过程中切除的癌组织及癌旁组织标本;实时荧光定量PCR(real-time fluorescence quantitative PCR,RT-qPCR)检测癌组织及癌旁组织CLDN10和CSPG4表达水平,并分别以NSCLC患者癌组织中CLDN10和CSPG4表达水平的平均数为界限,分为CLDN10高表达组(n=66),CLDN10低表达组(n=70)和CSPG4高表达组(n=71),CSPG4低表达组(n=65);采用多因素COX回归分析确定NSCLC患者预后的影响因素;采用Kaplan-Meier生存曲线分析NSCLC患者CLDN10和CSPG4表达水平与其预后的关系。结果NSCLC组织中CLDN10表达水平(0.96±0.25)低于癌旁组织(1.73±0.42),CSPG4表达水平(1.80±0.46)高于癌旁组织(1.04±0.27),差异有统计学意义(t=18.372,16.617,均P<0.05)。与生存组比较,死亡组低未分化占比、淋巴结转移占比及癌组织中CSPG4表达水平较高,CLDN10表达水平较低,差异具有统计学意义(t/χ^(2)=8.463,7.423,11.696,6.426,均P<0.05)。CLDN10高表达组五年存活率(58.46%)高于低表达组(37.31%),CSPG4低表达组患者五年存活率(55.56%)高于高表达组(40.58%),差异有统计学意义(χ^(2)=7.848,4.018,均P<0.05)。多因素COX分析结果显示,CLDN10低表达、CSPG4高表达、低分化程度、淋巴结转移是NSCLC患者预后的危险因素(HR=1.362,1.368,1.335,1.314,均P<0.05)。结论NSCLC患者癌组织中CLDN10表达水平较低,CSPG4水平较高,且与NSCLC发展和预后密切相关。

血清AQP4、NFL、BAFF水平与癫痫患儿认知功能的相关性及其对认知功能损害的评估价值

目的探讨癫痫患儿血清水通道蛋白4(AQP4)、神经丝轻链蛋白(NFL)、B细胞活化因子(BAFF)水平与认知功能的相关性及其对认知功能损害的评估价值。方法选取2020年5月至2023年5月周口市中心医院收治的126例癫痫患儿作为研究对象,依据蒙特利尔认知评估量表(MoCA)分为认知损害组58例和认知正常组68例,同时选取同期体检正常儿童42例作为对照组。比较三组受检者的血清AQP4、NFL、BAFF水平;采用Pearson法分析血清AQP4、NFL、BAFF水平与国立医院癫痫发作严重程度量表(NHS3)、MoCA评分的相关性;采用多因素Logistic回归分析认知功能损害的影响因素,绘制受试者工作特征曲线(ROC)及曲线下面积(AUC)分析血清AQP4、NFL、BAFF水平对认知功能损害的评估价值。结果认知损害组患者的血清AQP4水平明显低于认知正常组和对照组,且认知正常组明显低于对照组,认知损害组患者的血清NFL、BAFF水平则明显高于认知正常组和对照组,且认知正常组明显高于对照组,差异均有统计学意义(P<0.05);认知损害组患者的NHS3评分为(14.25±3.75)分,明显高于认知正常组的(10.08±3.16)分,差异有统计学意义(P<0.05);经Pearson法分析结果显示,AQP4与MoCA评分呈正相关(r=0.528,P<0.05),与NHS3评分呈负相关(r=-0.429,P<0.05),而NFL、BAFF与MoCA评分呈负相关(r=-0.438、-0.501,P<0.05),NFL、BAFF与NHS3评分呈正相关(r=0.442、0.538,P<0.05);经多因素Logistic回归分析结果显示,全面性发作、发作频率升高、AQP4水平降低及NFL、BAFF水平升高均为认知功能损害的危险因素(P<0.05);经ROC分析结果显示,血清AQP4、NFL、BAFF、AQP4+NFL、AQP4+BAFF、BAFF+NFL、AQP4+NFL+BAFF评估认知功能损害的AUC分别为0.716、0.705、0.786、0.834、0.818、0.828、0.940,且AQP4+NFL+BAFF评估认知功能损害的AUC明显大于任意两项指标联合评估、单独指标评估(P<0.05)。结论癫痫患儿认知功能损害者血清AQP4水平降低,血清NFL、BAFF水平升高,其与癫痫发作严重程度密切相关,且为认知功能损害的影响因素,联合检测其水平对认知功能损害的评估具有临床意义。

青藤碱调节CXCR4-STAT3轴对卵巢癌A2780细胞增殖、迁移和血管生成拟态的影响

目的:探讨青藤碱(Sinomenine)对卵巢癌细胞增殖、迁移和血管生成拟态的影响及作用机制。方法:使用不同浓度(0、0.25、0.50、1.0、2.0、4.0、8.0 mmol/L)的青藤碱分别处理A2780细胞24、48 h, CCK-8法检测细胞存活率。将A2780细胞随机分为对照(Control)组、CXCR4激活剂基质细胞衍生因子-1(SDF-1)(SDF-1,100 ng/mL)组、CXCR4抑制剂普乐沙福(Plerixafor, 500 ng/mL)组、青藤碱(Sinomenine, 1.0 mmol/L)组、Sinomenine+SDF-1(1.0 mmol/L Sinomenine+100 ng/mL SDF-1)组,分别检测A2780细胞增殖、迁移与侵袭,体外血管生成拟态形成实验检测青藤碱对血管生成拟态的影响,Western blot法检测血管内皮生长因子(VEGF)、上皮细胞激酶(EphA2)、基质金属蛋白酶9(MMP-9)、MMP-2、CXC趋化因子受体4(CXCR4)、信号转导与转录激活因子3(STAT3)、磷酸化STAT3(p-STAT3)蛋白表达。结果:青藤碱可有效抑制A2780细胞增殖,且呈浓度依赖性;青藤碱可显著抑制A2780细胞迁移、侵袭及血管生成拟态形成,并下调血管生成拟态标志蛋白VEGF、EphA2、MMP-9、MMP-2表达,抑制CXCR4、p-STAT3表达(P<0.05),青藤碱的这一抑制作用可被CXCR4激活剂减弱。结论:青藤碱可能通过抑制CXCR4-STAT3轴,抑制卵巢癌细胞增殖、迁移、侵袭及血管生成拟态形成。

NONHSAT248596.1内源性竞争miR-146a-5p调控骨关节炎软骨退变的机制

背景:目前已有针对lncRNA\miRNA\mRNA的共表达网络对骨关节炎发生发展调控机制的研究,课题组前期研究已通过数据库筛选出符合条件的NONHSAT248596.1和miR-146a-5p,尚缺乏体内实验来验证上述调控机制。目的:探究NONHSAT248596.1在基质细胞衍生因子1/4型趋化因子受体轴介导体内骨关节炎软骨退变进程中对miR-146a-5p发挥的竞争性内源性RNA调控作用。方法:取36只新西兰兔,通过向右侧后肢膝关节注射基质细胞衍生因子1溶液建立骨关节炎模型,采用随机数字表法分4组,lncRNA组、miRNA组、ceRNA组、对照组分别向造模膝关节内注射NONHSAT248596.1过表达的慢病毒载体、miR-146a-5p过表达的慢病毒载体、miR-146a-5p+NONHSAT248596.1过表达的慢病毒载体及空慢病毒载体。造模第4,8,12周,取膝关节软骨组织和软骨下骨组织进行相关检测。结果与结论:①苏木精-伊红与番红O固绿染色显示,4组软骨组织都有不同程度的退变表现,造模第4周时,lncRNA组软骨组织中的软骨细胞肿胀、细胞极性消失,细胞外基质破坏,出现表层糜烂、裂缝形成和软骨组织局部或全层缺失,并随时间延长软骨损伤程度逐渐加重,4组中miRNA组关节软骨炎症进展最缓慢;②qRT-PCR检测显示,相同时间点下,lncRNA组软骨组织中NONHSAT248596.1、4型趋化因子受体、基质金属蛋白酶3,9及13的mRNA表达量高于其他3组(P<0.05),miR-146a-5p、聚集蛋白聚糖及Ⅱ型胶原的mRNA表达量低于其他3组(P<0.05);造模后第8,12周,miRNA组软骨组织中的NONHSAT248596.1、4型趋化因子受体、基质金属蛋白酶3,9及13的mRNA表达量低于ceRNA组、对照组(P<0.05),miR-146a-5p、聚集蛋白聚糖及Ⅱ型胶原的mRNA表达量高于ceRNA组、对照组(P<0.05);③Western Blot检测显示,相同时间点下,lncRNA组软骨组织中的聚集蛋白聚糖及Ⅱ型胶原蛋白表达量始终低于其他3组(P<0.05);miRNA组造模后第8,12周软骨组织中的聚集蛋白聚糖及Ⅱ型胶原蛋白表达量高于ceRNA组、对照组(P<0.05);④结果表明,miR-146a-5p作为NONHSAT248596.1的作用靶点会受到其竞争性内源性RNA的作用造成活性被抑制,NONHSAT248596.1作用于miR-146a-5p后调控基质细胞衍生因子1/4型趋化因子受体轴,影响骨关节炎软骨组织中基质金属蛋白、Ⅱ型胶原、聚集蛋白聚糖的表达,造成细胞外基质的降解及蛋白多糖的丢失。

非小细胞肺癌组织中miR-363-3p、SOX4 mRNA表达及对上皮间质转化进程的影响

目的探讨非小细胞肺癌组织中微小RNA-363-3p(miR-363-3p)、性别决定区Y框蛋白4(SOX4)表达及对上皮间质转化(EMT)进程的影响。方法收集行手术切除的84例非小细胞肺癌患者的癌及其癌旁组织。采用实时荧光定量聚合酶链反应检测癌及癌旁组织miR-363-3p、SOX4 mRNA表达,免疫组化SP法检测癌及癌旁组织中E-cadherin、Vimentin表达。比较不同病理特征患者癌组织中miR-363-3p、SOX4 mRNA表达,采用Spearman秩相关分析癌组织miR-363-3p、SOX4 mRNA表达与E-cadherin、Vimentin相关性。使用相对超危险度比(RERI)、归因比(AP)、交互作用指数(SI)分析miR-363-3p、SOX4参与EMT进程的交互作用。结果癌组织中miR-363-3p表达低于癌旁组织,SOX4 mRNA表达高于癌旁组织(P均<0.05);癌组织中miR-363-3p、SOX4 mRNA表达与性别、年龄、吸烟史、肿瘤最大径无关(P均>0.05),与分化程度、TNM分期有关(P均<0.05);癌组织E-cadherin阳性表达率低于癌旁组织,Vimentin阳性表达率高于癌旁组织(P均<0.05);癌组织miR-363-3p与E-cadherin表达呈正相关(r=0.491,P<0.05),与Vimentin表达呈负相关(r=-0.506,P<0.05);癌组织SOX4 mRNA与E-cadherin表达呈负相关(r=-0.527,P<0.05),与Vimentin表达呈正相关(r=0.463,P<0.05)。癌组织miR-363-3p、SOX4对EMT进程存在负向交互作用(RERI=29.639,AP=70.91,SI=3.656)。结论非小细胞肺癌组织中miR-363-3p、SOX4异常表达与EMT有关,且二者对EMT进程存在负向交互作用。

苍附导痰汤对肥胖型PCOS大鼠内分泌激素及miRNA-16和PDCD-4表达的影响

目的:探讨苍附导痰汤对肥胖型多囊卵巢综合征(PCOS)大鼠内分泌激素及微小RNA(miRNA)-16和程序性细胞死亡因子4(PDCD-4)表达的影响。方法:将50只SPF级雌性SD大鼠随机分为5组,每组10只。阳性对照组大鼠灌胃格华止(0.43 g/kg),低剂量组大鼠灌胃低剂量苍附导痰汤(1.42 g/kg),高剂量组大鼠灌胃高剂量苍附导痰汤(5.68 g/kg),模型组和正常组大鼠灌胃等量生理盐水,各组均持续给药14 d。比较各组大鼠体质量,内分泌激素水平,miRNA-16和PDCD-4 mRNA表达,以及PDCD-4蛋白表达。结果:模型组、阳性对照组、低剂量组和高剂量组大鼠体质量均高于正常组(P<0.05);阳性对照组、低剂量组和高剂量组大鼠体质量均低于模型组(P<0.05),且呈剂量依赖性。模型组、阳性对照组、低剂量组和高剂量组大鼠血清E_(2)均水平低于正常组,而血清T、FSH和LH水平均高于正常组(P<0.05);阳性对照组、低剂量组和高剂量组大鼠血清E_(2)水平均高于模型组,而血清T、FSH和LH水平均低于模型组(P<0.05),且呈剂量依赖性。模型组、阳性对照组、低剂量组和高剂量组大鼠卵巢miRNA-16表达均低于正常组,而PDCD-4 mRNA表达高于正常组(P<0.05);阳性对照组、低剂量组和高剂量组大鼠卵巢miRNA-16表达均高于模型组,而PDCD-4 mRNA表达低于模型组(P<0.05),且呈剂量依赖性。模型组、阳性对照组、低剂量组和高剂量组大鼠卵巢PDCD-4蛋白相对表达量均高于正常组(P<0.05);阳性对照组、低剂量组和高剂量组大鼠卵巢PDCD-4蛋白相对表达量均低于模型组(P<0.05),且呈剂量依赖性。结论:苍附导痰汤可调节肥胖型PCOS大鼠内分泌激素水平,其机制可能与上调miRNA-16表达及下调PDCD-4表达有关。

血清转化生长因子β1、白细胞介素-6、Toll样受体-4、核转录因子κB联合评估非小细胞肺癌放射性肺炎病情严重程度的价值

目的探讨血清转化生长因子β1(TGF-β1)、白细胞介素-6(IL-6)、Toll样受体-4(TLR-4)和核转录因子κB(NF-κB)联合评估非小细胞肺癌(NSCLC)放射性肺炎(RP)病情严重程度的价值。方法选取104例NSCLC放疗后继发RP患者作为研究组,另选取52例NSCLC放疗后未继发RP患者作为对照组。比较2组患者放疗前后血清TGF-β1、IL-6、TLR-4、NF-κB水平。比较研究组不同程度RP患者放疗前后血清TGF-β1、IL-6、TLR-4、NF-κB水平,分析各血清指标单独及联合评估NSCLC放疗后RP病情程度的价值。结果放疗结束后,研究组患者血清TGF-β1、IL-6、TLR-4、NF-κB水平均高于对照组,差异有统计学意义(P<0.05);放疗结束后,随着RP病情程度的增加,研究组患者血清TGF-β1、IL-6、TLR-4、NF-κB水平呈升高趋势,差异有统计学意义(P<0.05)。受试者工作特征(ROC)曲线分析结果显示,放疗结束后血清TGF-β1、IL-6、TLR-4、NF-κB水平评估1级RP的曲线下面积(AUC)分别为0.787、0.718、0.783、0.801,评估≥2级RP的AUC分别为0.729、0.740、0.793、0.825;血清TGF-β1、IL-6、TLR-4、NF-κB阳性表达患者发生≥2级RP的风险分别是阴性表达患者的2.473、2.275、2.610、5.267倍(P<0.05);血清TGF-β1、IL-6、TLR-4、NF-κB联合评估≥2级RP的AUC为0.939,敏感度为76.00%,特异度为97.47%。结论NSCLC患者放疗结束后血清TGF-β1、IL-6、TLR-4、NF-κB水平均与RP病情严重程度呈正相关,四者联合评估≥2级RP的价值显著,可为临床控制RP病情提供参考依据。

下调PDCD4抑制MAP2K3和p38 MAPK的表达减轻LPS诱导的肾小管上皮细胞炎症和凋亡

目的研究程序性细胞死亡蛋白4(programmed cell death protein 4,PDCD4)在脓毒症诱导的急性肾损伤(acute kidney injury,AKI)中的作用机制,以及调控PDCD4表达通过丝裂原活化蛋白激酶3(mitogen-activated protein kinase 3,MAP2K3)和p38蛋白激酶(p38 mitogen-activated protein kinase,p38 MAPK)对脓毒症AKI起到潜在治疗作用。方法用脂多糖(lipopolysaccharide,LPS)刺激人肾小管上皮细胞(HK-2)构建脓毒症AKI细胞模型。进一步用腺病毒介导siRNA和过表达载体抑制和上调AKI细胞模型中PDCD4的表达;CCK-8法检测细胞增殖;用DCFH-DA及激光共聚焦显微镜检测细胞中ROS水平,用总SOD活性检测试剂和MDA检测试剂盒检测细胞中SOD和MDA水平;免疫共沉淀验证PDCD4和MAP2K3之间的蛋白相互作用;TUNEL染色法检测细胞凋亡;RT-qPCR和Western blot检测PDCD4及相关基因的mRNA和蛋白表达水平;ELISA法检测患者血清中炎症相关因子水平。结果LPS诱导可以促进HK-2细胞中PDCD4表达,下调PDCD4可抑制LPS诱导的HK-2细胞的炎症、氧化应激及细胞凋亡。数据库预测及免疫共沉淀证实PDCD4可以与MAP2K3相互作用,且在LPS诱导的HK-2细胞中,MAP2K3表达水平显著增强。MAP2K3过表达和p38 MAPK激动剂可以减轻PDCD4下调对LPS诱导的细胞炎症和氧化应激的影响并抑制细胞凋亡。结论下调PDCD4可以通过抑制MAP2K3和p38 MAPK从而抑制LPS诱导的肾小管上皮细胞的炎症和凋亡。

4‑Terminal Inorganic Perovskite/Organic Tandem Solar Cells Offer 22%Efficiency

After fast developing of single-junction perovskite solar cells and organic solar cells in the past 10 years,it is becoming harder and harder to improve their power conversion efficiencies.Tandem solar cells are receiving more and more attention because they have much higher theoretical efficiency than single-junction solar cells.Good device performance has been achieved for perovskite/silicon and perovskite/perovskite tandem solar cells,including 2-terminal and 4-terminal structures.However,very few studies have been done about 4-terminal inorganic perovskite/organic tandem solar cells.In this work,semi-transparent inorganic perovskite solar cells and organic solar cells are used to fabricate 4-terminal inorganic perovskite/organic tandem solar cells,achieving a power conversion efficiency of 21.25%for the tandem cells with spin-coated perovskite layer.By using drop-coating instead of spin-coating to make the inorganic perovskite films,4-terminal tandem cells with an efficiency of 22.34%are made.The efficiency is higher than the reported 2-terminal and 4-terminal inorganic perovskite/organic tandem solar cells.In addition,equivalent 2-terminal tandem solar cells were fabricated by connecting the sub-cells in series.The stability of organic solar cells under continuous illumination is improved by using semi-transparent perovskite solar cells as filter.