Altered profiles of nuclear matrix proteins during the differentiation of human gastric mucous adenocarcinoma MGc80-3 cells

AIM： To find and identify specific nuclear matrix proteins associated with proliferation and differentiation of carcinoma cells, which will be potential markers for cancer diagnosis and targets in cancer therapy. METHODS： Nuclear matrix proteins were selectively extracted from MGcS0-3 cells treated with or without hexamethylamine bisacetamide （HMBA）, and subjected to 2-D gel electrophoresis. The resulted protein patterns were analyzed by Melanie software. Spots of nuclear matrix proteins differentially expressed were excised and subjected to in situ digestion with trypsin. Peptide masses were obtained by matrix-assisted laser-desorption/ ionization time of flight mass spectrometry （MALDI-TOFMS） analysis and submitted for database searching using Mascot tool. RESULTS： The MGc80-3 cells were induced into differentiation by HMBA. There were 22 protein spots which changed remarkably in the nuclear matrix, from differentiation of MGcS0-3 cells compared to control. Eleven of which were identified. Seven proteinsactin, prohibitin, porin 31HL, heterogeneous nuclear dbonucleoprotein A2/B1, vimentin, ATP synthase, and heat shock protein 60 were downregulated, whereas three proteins - heat shock protein gp96, heat shock protein 90-beta, and valosin-containing protein were upregulated, and the oxygen-regulated protein was only found in the differentiated MGc80-3 cells. CONCLUSION： The induced differentiation of carcinoma cells is accompanied by the changes of nuclear matrix proteins. Further characterization of those proteins will show the mechanism of cellular proliferation and differentiation, as well as cancer differentiation.

Comparisons of voided urine cytology, nuclear matrix protein-22 and bladder tumor associated antigen tests for bladder cancer of geriatric male patients in Taiwan, China

Aim： To compare the results of bladder tumor associated antigen （BTA TRAK）, nuclear matrix protein 22 （NMP 22） and voided urine cytology （VUC） in detecting bladder cancer. Methods： A total of 135 elderly male and 50 healthy volunteers enrolled in this study were classified into three groups： （i） 93 patients with bladder cancer; （ii） 42 patients with urinary benign conditions; and （iii） 50 healthy volunteers. BTA TRAK and NMP 22 kits were used to detect bladder cancer. Voided urine cytology was used to compare the sensitivity and specificity of the screening tests. Results： The sensitivity and specificity of cytology, BTA TRAK and NMP 22 were 24% and 97%, 51% and 73%, 78% and 73%, respectively. The level of NMP 22 increased with tumor grading. The BTA TRAK kit has the lowest sensitivity among the screening tests. The NMP 22 with the best sensitivity can be an adjunct to cytology for evaluating bladder cancer. Conclusion： The NMP 22 test has a better correlation with the grading of the bladder cancer than BTA TRAK. As cytology units are typically not available in hospitals or in outpatient clinics, NMP 22 might be a promising tool for screening bladder cancer.

Alreration of nuclear matrix-intermediate filament system and differential expression of nuclear matrix proteins during human hepatocarcinoma cell differentiation

AIM： To investigate the association between the configurational and compositional changes of nuclear matrix and the differentiation of carcinoma cells. METHODS： Cells cultured with or without 5 × 10^-3 mmol/L of hexamethylene bisacetamide （HMBA） on Nickel grids were treated by selective extraction and prepared for whole mount observation under electron microscopy. The samples were examined under transmission electron microscope. Nuclear matrix proteins were selectively extracted and subjected to subcellular proteomics study. The protein expression patterns were analyzed by PDQuest software. Spots of differentially expressed nuclear matrix proteins were excised and subjected to in situ digestion with trypsin. The peptides were analyzed by matrix-assisted laser- desorption/ionization time of flight mass spectrometry （MALDI-TOF-MS）. Data were submitted for database searching using Mascot tool （www.matrixscience.com）. RESULTS： The nuclear matrix （NM） and intermediate filament （IF） in SMMC-7721 hepatocarcinoma cells were found relatively sparse and arranged irregularly. The nuclear lamina was non-uniform, and two kinds of filaments were not tightly connected. After induction for differentiation by HMBA, the NM-IF filaments were concentrated and distributed uniformly. The heterogeneous population of filaments, including highly branched utrathin filaments could also be seen in the regular meshwork. The connection between the two kinds of filaments and the relatively thin, condensed and sharply demarcated lamina composed of intermediate- sized filaments was relatively fastened. Meanwhile, 21 NM proteins changed remarkably during SMMC-7721 cell differentiation. Four proteins, i.e. mutant Pystl, hypothetical protein, nucleophosminl, and LBP were downregulated, whereas four other proteins, eIF6, p44 subunit, 13-tubulin, and SIN3B were upregulated with the last one, SR2/ASF found only in the differentiated SMMC-7721 cells. CONCLUSION： The induced differentiation of SMMC-7721 cells by HMBA is accompanied by the configurational changes of nuclear matrix-intermediate filament （NM-IF） system and the compositional changes of nuclear matrix protein expression. These changes may be important morphological or functional indications of the cancer cell reversion.

CHANGES OF NUCLEAR MATRIX PROTEIN AND ITS RELATIONSHIP WITH c-erbB-2 IN HUMAN COLON ADENOCARCINOMA

Objective： Nuclear matrix protein is tissue, cell-type specific, and tumor-relative. It plays an important role in the regulation of intranuclear processes. Some researches also showed that a c-erbB-2 promoter-specific DNA-binding nuclear matrix protein is present only in malignant human breast tissues and induces mitogenesis and cell surface expression of the c-erbB-2 protein in resting NIH/3T3 cells. But it is not clear that how it in colon adenocarcinomas. Methods： Two-dimensional gel electrophoretic method was used for NMP identification and immunohistochemistry was used for c-erbB-2 detection in 12 cases of colon adenocarcinomas and matched adjacent normal colon tissues. Results： 5 different nuclear matrix proteins （named C1-C5） were identified in 12 colon adenocarcinoma specimens, but not in the matched adjacent normal colon tissues; 3 nuclear matrix proteins （named N1-N3） were identified in all 12 matched adjacent normal colon tissues, but not in colon adenocarcinoma specimens. A nuclear matrix protein （named N4） was detected in all of 9 moderated-well differentiated adenocarcinomas and all 12 matched adjacent normal colon tissues, but not in 3 poor-differentiated adenocarcinomas. All of the 10 colon adenocarcinomas which had the nuclear matrix protein C4 were c-erbB-2 expression positive. Conclusion： The data suggest that there are specific nuclear matrix proteins in colon adenocarcinomas and its subtypes, which maybe valuable to serve as markers of colon adenocarcinomas in future. Nuclear matrix protein C4 probably is a c-erbB-2 promotor-specific nuclear matrix protein in colon adenocarcinomas, and may induce the expression of c-erbB-2.

NUCLEAR MATRIX PROTEIN IN LEUKEMIA CELLS

Objective: To compare the composition of nuclear matrix proteins (NMP) between leukemia cells and normal bone marrow cells. Methods: NMP was isolated by high-salt extraction and identified in acute and chronic myelogenous leukemia cells as well as in the blast phase of chronic leukemia. On SDS-PAGE, NMPs with molecular myelogenous ferment from what were seen in normal bone marrow cells were present in both acute and chronic myelogenous leukemia. Conclusion: Marked changes of NMP, not only in contents but also in compositions, exist in leukemic cells compared with normal bone marrow cells. NMP may serve as a target of chemotherapeutic drug against leukemia.

The 5'-flanking cis-acting elements of the human ε-globin gene associates with the nuclear matrix and binds to the nuclear matrix proteins

The nucleax mains attachment regions(MARs) and the binding nuclear matrix proteins in the 5’-flalildng cisacting elements of the humanε-globin gene have been examined. Using in vitro DNA-matrix binding assay,it has been shown that the positive stage-specific regulatory element (ε-PREII, -446bp-419bp) upstream of this gene could specifically associate with the nuclear matrix from K562 cells, indicating thatε-PREII mad be an erythroidspecilic facultstive MAR. In gel mobility shift assay and Southwestern blotting assal an eothroid-specific nuclear matrix protein (ε-NMPk) in K562 cells has been revealed to bind to this positive regulatory element (E-PREII). Furthermore, we demonstrated that the silencer (-392hp -177bp) uP8tream of the humanε-globin gene could associate with the nuclear matrices from K562, HEL and Raji cells. In addition, the nucleax matrix proteins prepared from these three cell lines could also bind to this silencer, suggesting that this silencer element linght be a constitutive nuclear mains attachment region (constitutive MAR). Our results demonstrated that the nucleax madrid and nuclear mains proteins lxilght play an important role in the regulation of the human 5-globin gene expression.

STUDY ON NUCLEAR MATRIX PROTEINS FROM HUMAN BREAST CARCINOMA

Objective To investigate the marker protein of human breast carcinoma from nuclear matrix proteins (NMPs). Methods NMPs were injected subcutaneously into rabbit to get antiserum, which was used to detect the NMPs specificity for breast carcinoma. Results There was an apparent positive band (100 kD) in the NMPs of breast carcinoma, which did not exist in normal breast and other tumors that were detected.Conclusion One or one group of 100 kD NMPs were found to be related to human breast carcinoma, which may be involved in the carcinogenesis and development of human breast carcinoma and valuable for breast carcinoma diagnosis.

Changes of Nuclear Matrix Proteins Following the Differentiation of Human Osteosarcoma MG-63 Cells

Human osteosarcoma MG-63 cells were induced into differentiation by 5 mmol/L hexamethylene bisacetamide （HMBA）. Their nuclear matrix proteins （NMPs） were selectively extracted and subjected to two-dimensional gel electrophoresis analysis. The results of protein patterns were analyzed by Melanie software. The spots of differentially expressed NMPs were excised and subjected to in situ digestion with trypsin. The maps of peptide mass fingerprinting were obtained by MALDI-TOF-MS analysis, and were submitted for NCBI database searches by Mascot tool. There were twelve spots changed remarkably during the differentiation induced by HMBA, nine of which were identified. The roles of the regulated proteins during the MG-63 differentiation were analyzed. This study suggests that the induced differentiation of cancer cells is accompanied by the changes of NMPs, and confirms the presence of some specific NMPs related to the cancer cell proliferation and differentiation. The changed NMPs are potential markers for cancer diagnosis or targets for cancer therapy.

Interactions between the nuclear matrix proteins and the 5'-flanking cis-acting elements of the human ε-globin gene

An erythroid-specific nuclear matrix protein (termed ε-NMP_k) in K562 cells, which can specifically bind to the positive stage-specific regulatory element (ε-PRE Ⅱ, -446—-419 bp) upstream of the human ε-globin gene, has been identified by using gel mobility shift assay.Meanwhile, Southwestern blotting assay showed that the nuclear matrix protein ε-NMP_k in K562,cells may be composed of two polypeptides ( ～ 40 ku). In addition, it is observed in the gel mobility shift assay that the nuclear matrix proteins from K562, HEL and Raji cells can bind to the silencer DNA ( - 392— -177 bp) in the 5’-flanking sequence of human ε-globin gene respectively. However, the shift band K detected in K562 cells is different from shift band H/R in HEL and Raji cells, suggesting that a common nuclear matrix protein may exist in HEL and Raji cells. Results show that the nuclear matrix protein may play an important role in the regulation of the human ε-globin gene expression.

Anchoring of c-myc on nuclear matrix proteins in process of mouse thymic T lymphocyte proliferation induced by ConA

Isolation and characteriation of functional nudear matrix proteins involved in DNA anchoring and gene expression is one of the major subjects of current nudear matrix research. Southwestern blotting (DNA-protein hybridization) was applied to studying the anchoring of c-myc on the nudear matrix proteins in mouse thymic T lymphocytes. The results showed that c-myc bound to the lamin, p34 and p36 nudear matrix proteins specifically. In the process of mouse thymic PNA T lymphocytes proliferation induced by ConA, the anchoring of c-myc on p34 and p36 nudear matrix proteins changed dynamically.

Fluorescent and colorimetric immunoassay of nuclear matrix protein 22 enhanced by porous Pd nanoparticles

A modified ELISA realizing fluorescent and colorimetric immunoassay of nuclear matrix protein 22 (NMP 22) was developed based on porous Pd nanoparticles. The unique structure and excellent enzyme mimetic activity of porous Pd nanoparticles favor to oxidize o-phenylenediamine (OPD) into 2,3-phenazinediamine (oxOPD) by H2O2, producing colorimetric and fluorescence dual-readout signal for the detection of NMP 22. The developed immunoassay method will offer great potential in clinical research and diagnostic applications.

The interaction between the human β-globin locus control region and nuclear matrix

Our previous study showed that hydroxyurea (Hu) could induce HEL cells to express humanβ-globin gene. However the molecular mechanisms by which the expression of β-globin gene is activated and regulated are poorly understood. Here we show that the binding patterns between the core DNA sequences (HS2 core sequence -10681- -10971 bp , HS3 core sequence -14991- -14716 bp and HS4 core sequence -18586- -18306 bp) of DNase I hypersensitive sites in the human β-globin LCR and nuclear matrix proteins isolated from Hu induced and uninduced HEL cells are quite different. Results demonstrated that nuclear matrix proteins might play important roles in regulating the expression of humanβ-like globin genes through their interaction with HSs (HS2,HS3 and HS4 core sequences) in the LCR. Moreover, the results obtained from the in vitro DNA-matrix binding assay showed that the core DNA sequences of DNase I hypersensitive sites (HS2, HS3 and HS4) were unable to bind to the nuclear matrix isolated from uninduced HEL cells; in addition, HS2 core DNA sequence was capable of binding to the nuclear matrix prepared from Hu-induced HEL cells, while both HS3 and HS4 core DNA sequences could not do so. Results indicated that the HS2 core DNA sequence may be a functional MAR (matrix attachment region). We suggest that the HS2 core DNA sequence binding to the nuclear matrix in Hu-induced HEL cells may open the structure of chromatin to make the LCR accessible to the promoter of β-globin gene and to promote its transcription.

膀胱肿瘤抗原、尿核基质蛋白22、细胞角蛋白-19对膀胱癌的诊断价值分析

目的分析膀胱肿瘤抗原(BTA)、尿核基质蛋白22(NMP22)、细胞角蛋白-19(CK-19)对膀胱癌的诊断价值。方法选取53例膀胱癌患者作为膀胱癌组,49例泌尿系良性疾病患者作为对照组。比较两组患者CK-19、NMP22及BTA水平,分析三者水平与膀胱癌患者临床特征的关系,分析CK-19、NMP22及BTA单独及联合检测对膀胱癌的诊断价值。结果膀胱癌组患者尿液NMP22、BTA及血清CK-19水平均明显高于对照组,差异均有统计学意义(P﹤0.01)。肿瘤分期为Ⅲ~Ⅳ期的膀胱癌患者尿液NMP22、BTA及血清CK-19水平均明显高于Ⅰ~Ⅱ期患者,差异均有统计学意义(P﹤0.01)。CK-19、NMP22及BTA联合检测诊断膀胱癌的灵敏度和特异度分别为0.805和0.869,曲线下面积(AUC)为0.854(95%CI:0.774~0.934),均高于CK-19、NMP22及BTA单独检测。结论膀胱癌患者CK-19、NMP22及BTA水平显著升高,三者水平升高与肿瘤分期相关,密切监测三者水平变化可为临床诊断膀胱癌提供依据。

术前尿BTA、NMP22定量联合检测对膀胱癌的诊断价值研究

目的探讨术前尿BTA、NMP22定量联合测定对膀胱癌的诊断价值。方法选取2021年1月至2022年09月于惠州市中心人民医院泌尿外科确诊为膀胱癌的73例患者作为观察组,另选取同期就诊的73例泌尿系统良性疾病患者作为对照组。检测两组患者术前尿BTA、NMP22定量水平,根据检测结果回顾性分析两个指标在膀胱癌中的单项及联合诊断价值,同时分析不同临床肿瘤特征患者上述两个指标的阳性率差异情况。结果观察组和对照组的术前尿BTA定量水平分别为(997.85±237.73)pg/mL、(691.33±190.16)pg/mL;NMP22定量水平分别为(8.57±1.49)ng/mL、(6.23±1.29)ng/mL。与对照组相比,观察组患者术前尿BTA、NMP22水平均明显升高(P<0.01)。术前尿BTA、NMP22在膀胱癌诊断中的灵敏度分别为76.7%和78.1%,特异度为90.4%和91.8%,曲线下面积分别为0.849和0.867,此时两者的最佳截断值分别为834.55 pg/mL和7.47 ng/mL。两者联合诊断的灵敏度、特异度、曲线下面积分别为89.0%、87.7%、0.931,其中灵敏度及曲线下面积均较单项检测高。不同年龄、性别、BMI、吸烟情况患者的BTA和NMP22阳性率比较,差异无统计学意义(P>0.05);而不同肿瘤直径、肿瘤数目、肿瘤分级、肿瘤分期患者的BTA和NMP22阳性率比较,差异具有统计学意义(P<0.05)。结论术前尿BTA、NMP22定量水平测定对膀胱癌具有较好的诊断效能,具备无创、便捷、可批量检测等优点,且两者联合检测可提高诊断敏感度,减少漏诊可能,值得用于临床实践。

尿液基细胞荧光原位杂交检测对膀胱尿路上皮癌的诊断价值

目的探讨尿液基细胞学(LBC)靶向的荧光原位杂交(FISH)对膀胱尿路上皮癌(BUC)的诊断价值。方法回顾性收集2020年10月—2022年10月于首都医科大学附属北京天坛医院泌尿外科行膀胱镜检查的128例患者的临床资料。所有患者在行膀胱镜检查前进行尿核基质蛋白22(NMP22)检测、尿LBC检测与尿LBC靶向的FISH检测,以术后病理结果为标准,分析3种检查方法的灵敏度和特异度。结果NMP22、尿LBC与LBC靶向的FISH的灵敏度分别为61.11%、79.17%、82.46%,特异度分别为57.14%、73.21%、86.67%;NMP22、尿LBC的灵敏度在检测高级别BUC时优于低级别,差异有统计学意义(P=0.01,P=0.03);3种方法对肌层浸润性膀胱癌与非肌层浸润性膀胱癌检测的灵敏度比较,差异无统计学意义(P≥0.05)。结论尿LBC靶向的FISH对BUC诊断的灵敏度和特异度较高,尤其是对于低级别BUC,可以作为BUC早期筛查、诊断的重要方法。

长链非编码RNA人类白细胞抗原复合体18通过微RNA-497-5p/细胞周期蛋白E1轴调节弥漫性大B细胞淋巴瘤的增殖、凋亡和侵袭

目的 探讨长链非编码RNA人类白细胞抗原复合体18(lncRNA HCG18)调控微RNA-497-5p(miR-497-5p)/细胞周期蛋白E1(CCNE1)轴对弥漫性大B细胞淋巴瘤(DLBCL)细胞增殖、凋亡和侵袭的影响。方法 实时荧光定量PCR(qRT-PCR)、蛋白质印迹法分别检测2018年5月至2021年5月收集的恩施土家族苗族自治州中心医院DLBCL病人淋巴组织、良性淋巴结增生病人的淋巴组织、人正常B细胞永生化细胞HMy2.CIR、DLBCL细胞系SU-DHL-1、OCI-LY8、U2932中HCG18、miR-497-5p表达及CCNE1蛋白表达,将OCI-LY8细胞分为Ct组(正常培养的OCI-LY8细胞)、pcDNA组(细胞转染过表达物阴性对照)、pcDNA-HCG18组(细胞转染HCG18过表达物)、si-NC组(细胞转染小干扰RNA阴性对照)、si-HCG18组(细胞转染HCG18小干扰RNA)、si-HCG18+inhibitorNC组(细胞转染HCG18小干扰RNA和抑制物阴性对照)、si-HCG18+miR-497-5p inhibitor组(细胞转染HCG18小干扰RNA和miR-497-5p抑制物),CCK-8法检测细胞增殖,流式细胞术检测细胞凋亡,Transwell检测细胞侵袭,蛋白质印迹法检测CCNE1、增殖细胞核抗原(PCNA)、Bcl-2相关X蛋白(Bax)、基质金属蛋白酶9(MMP-9)蛋白表达,双萤光素酶验证HCG18与miR-497-5p、miR-497-5p与CCNE1的关系。结果 在DLBCL淋巴组织和细胞中,HCG18、CCNE1蛋白高表达,miR-497-5p低表达,且在OCI-LY8细胞中HCG18、CCNE1蛋白表达上调最高,miR-497-5p表达下调最多(P<0.05),因此,以OCI-LY8细胞进行后续研究,与si-NC组比较,si-HCG18组HCG18(0.26±0.03比1.01±0.01)、CCNE1蛋白(0.45±0.03比1.44±0.19)表达降低,miR-497-5p(1.95±0.14比1.03±0.02)表达升高(P<0.05),与pcDNA组比较,pcDNA-HCG18组HCG18(1.96±0.23比1.02±0.01)、CCNE1蛋白(2.33±0.21比1.42±0.18)表达升高,miR-497-5p(0.28±0.02比1.02±0.02)表达降低(P<0.05),与siHCG18组、si-HCG18+inhibitor NC组比较,miR-497-5p表达降低(1.21±0.09比1.95±0.14、1.94±0.13),CCNE1蛋白(0.87±0.08比0.45±0.03、0.44±0.04)表达上调(P<0.05),沉默HCG18可抑制OCI-LY8细胞增殖、侵袭行为及PCNA、MMP-9蛋白表达,诱导细胞凋亡及Bax蛋白表达,而上调HCG18则呈相反趋势,下调miR-497-5p逆转了沉默HCG18对OCI-LY8细胞增殖、侵袭、凋亡的影响,HCG18靶向调控miR-497-5p/CCNE1。结论 沉默HCG18可能通过调控miR-497-5p/CCNE1抑制OCI-LY8细胞增殖、侵袭,诱导细胞凋亡。

非染色体结构维护凝集素Ⅰ复合物亚基G通过Akt信号通路促进卵巢癌细胞的增殖、迁移和侵袭

目的探讨非染色体结构维护凝集素Ⅰ复合物亚基G(NCAPG)调控卵巢癌细胞的增殖、迁移和侵袭的机制。方法生物信息学GEPIA数据库分析NCAPG在卵巢癌组织中的差异表达。Western blotting检测正常卵巢上皮细胞IOSE80、卵巢癌A2780和SKOV3细胞中NCAPG的蛋白表达。NCAPG siRNA沉默实验分为空白组、对照组、siNCAPG-1组和siNCAPG-2组。NCAPG过表达实验分为空白组、对照组、NCAPG组、NCAPG+MK2206组和MK2206组。MTT实验检测细胞增殖活性;细胞划痕实验和Transwell实验评估细胞的迁移和侵袭能力;Western blotting检测细胞的磷酸化Akt(p-Akt)、总Akt(t-Akt)、增殖细胞核抗原(PCNA)、基质金属蛋白酶9(MMP-9)、波形蛋白(vimentin)、N-钙黏蛋白(N-cadherin)和E-钙黏蛋白(E-cadherin)的表达水平。结果NCAPG在卵巢癌组织和卵巢癌细胞中高表达。沉默NCAPG可明显抑制卵巢癌SKOV3细胞的增殖、迁移和侵袭,p-Akt、PCNA、MMP-9、vimentin和N-cadherin表达减少,E-cadherin表达增多。过表达NCAPG质粒可促进卵巢癌A2780细胞增殖、迁移和侵袭,p-Akt、PCNA、MMP-9、vimentin和N-cadherin表达增多,E-cadherin表达降低。Akt抑制剂MK2206可明显抑制NCAPG的上述作用。结论NCAPG激活Akt信号通路,调控PCNA、MMP-9和上皮细胞-间充质转化(EMT)相关蛋白的表达,促进卵巢癌细胞的增殖、迁移和侵袭。

联合检测尿核基质蛋白22和尿脱落细胞在监测膀胱癌术后复发中的临床价值

目的探究联合检测尿脱落细胞和尿核基质蛋白22(NMP22)在监测膀胱癌术后复发中的临床应用价值。方法对我院2017年10月至2022年3月收治的106例膀胱癌手术后患者行荧光膀胱镜检查,检查前分别留取尿液样本行NMP22和尿脱落细胞检测;以荧光膀胱镜检查和病理结果为金标准,评价单独检测与联合检测NMP22和尿脱落细胞在诊断膀胱癌复发中的敏感性、特异性、准确性、阳性率和癌检出率,以及在不同分期、分级肿瘤中的阳性检出率。结果单独检测NMP22和尿脱落细胞诊断膀胱癌复发的敏感性分别为60.78%和50.98%,特异性分别为78.18%和87.27%,准确性均为69.81%,而联合检测的敏感性高达92.16%、特异性为74.55%、准确性升至83.02%。联合检测NMP22和尿脱落细胞的阳性率(57.55%)、癌检出率(44.34%)均高于单独检测NMP22的阳性率(40.57%)、癌检出率(29.25%)以及单独检测尿脱落细胞的阳性率(31.13%)、癌检出率(24.53%)。在Ta期和G1级肿瘤中,联合检测的阳性率明显高于单独检测尿脱落细胞的阳性率(P<0.05);在T1期肿瘤中,联合检测的阳性率明显高于单独检测NMP22的阳性率(P<0.05);在G2级肿瘤中,联合检测的阳性率明显高于单独检测NMP22和单独检测尿脱落细胞的阳性率(P<0.05)。结论联合检测NMP22和尿脱落细胞可以明显提高诊断膀胱癌复发的敏感性、准确性、阳性率和癌检出率,提高在Ta、T1期和G1、G2级肿瘤中的检出阳性率,可在行膀胱镜复查前为膀胱癌患者提供更充分、全面及准确的评估,具有一定的临床意义。

抗NXP2抗体阳性的皮肌炎1例报告并文献复习

抗核基质蛋白2(nuclear matrix protein 2,NXP2)抗体阳性的皮肌炎是特发性炎性肌病的一种,除肌无力、皮肤改变的典型表现外,还有钙质沉着、皮下水肿、严重的肌痛及吞咽困难等表现。本文报道1例具有典型临床及影像学表现、随访17个月后复查抗NXP2抗体为阴性的患者。1病例资料患者,男,27岁,因“肢体疼痛无力1月余,加重2周”于2019年6月8日就诊于我科。患者于入院1月前无明显诱因出现肢体疼痛,腰部疼痛症状明显。3周前出现肢体无力感,伴面部皮疹,鼻翼两侧为著。2周前出现全身浮肿,抬头及转颈无力,双上肢抬起费力,坐起费力,行走约50米后肌肉无力酸痛明显,伴双上肢近端、双侧髋部、双膝关节及前胸部皮疹,伴发热,化验示肌酸激酶7500 U/L,行肌电图示肌源性损害,门诊按“肌病”收至我科。患者自发病以来,饮食睡眠可,二便如常,体重增加约10千克。

尿核基质蛋白22和非典型细胞参数在膀胱癌诊断中的临床价值

目的探讨尿核基质蛋白22(NMP22)和尿有形成分分析仪非典型细胞(Atyp.C)参数联合检测诊断膀胱癌的价值。方法选取2021年10月—2022年9月上海市静安区市北医院行NMP22检测和尿有形成分分析的患者3288例,其中膀胱癌患者97例(膀胱癌组,均为男性)、其他泌尿系统疾病患者3191例[总对照组,其中男1212例、女1979例];将1212例男性泌尿系统疾病患者作为男性对照组。采用受试者工作特征(ROC)曲线评价各项指标诊断膀胱癌的效能。结果膀胱癌组NMP22阳性率和Atyp.C荧光强度显著高于男性对照组和总对照组(P<0.001)。ROC曲线分析结果显示,以男性对照组为参考,NMP22、Atyp.C荧光强度单项检测和联合检测诊断膀胱癌的曲线下面积(AUC)分别为0.794、0.757、0.867。以总对照组为参考,NMP22、Atyp.C荧光强度单项检测和联合检测诊断膀胱癌的AUC分别为0.787、0.752、0.861。结论在膀胱癌的诊断中,NMP22具有较高的敏感性,Atyp.C参数具有较高的特异性,联合检测可显著提高诊断效能。