NEOPLASTIC TRANSFORMATION OF HUMAN EMBRYONIC NASOPHARYNGEAL EPITHELIAL CELLS INDUCED BY N,N'-DINITROSOPIPERAZINE (DNP) IN VITRO

This experiment is the first report on N, N'-dini-trosopiperazine (DNF)-induced neoplastic transformation of human embryonic nasopharyngeal (HENPE) cells. The transformed cells showed a prolonged life span, anchorage independent growth, chromosome aberration, tumorigenicity and an altered cell morphological appearance. The results demonstrated that DNP was able to induce not only nasopharyngeal carcinoma (NPC) of rats in vivo, but also neoplastic transformation of HENPE cells in vitro.

THE STUDY ON RELATED GENES IN THE NEOPLASTIC TRANSFORMATION OF IMMORTALIZED HUMAN FETAL TRACHEAL FIBROBLAST CELLS INDUCED BY IRRADIATION

In this study, we investigated the genes related to the transformation of immortalized human fetal tracheal fibroblast cell line induced by alpha particles by means of differential display mRNA method. The result revealed that there were 23 DNA fragments that were expressed intensively in alphaSHTF cells (SHTF cells forming clone on agar after irradiated by alpha particles emitted by 238Pu) only and not in SHTF (SV40-immortalized human fetal tracheal fibroblast) cells. Northern dot confirmed two fragments, C17-5, C23-1 which showed intensive mRNA expression in alphaSHTF cells, but not in SHTF cells. The length of the C17-5 fragment was 310bp. Searching in BLAST database revealed that the C17-5 fragment might be an unknown sequence.

Radiobiological characteristics of cancer stem cells from esophageal cancer cell lines

AIM: To study the cancer stem cell population in esophageal cancer cell lines KYSE-150 and TE-1 and identify whether the resulting stem-like spheroid cells display cancer stem cells and radiation resistance characteristics.

Targeting head and neck tumoral stem cells： From biologicalaspects to therapeutic perspectives

Head and neck squamous cell cancer(HNSCC) is the sixth most common cancer in the world. Effective therapeutic modalities such as surgery, radiation, chemotherapy and combinations of each are used in the management of the disease. In most cases, treatment fails to obtain total cancer cure. In recent years, it appears that one of the key determinants of treatment failure may be the presence of cancer stem cells(CSCs) that escape currently available therapies. CSCs form a small portion of the total tumor burden but may play a disproportionately important role in determining outcomes. CSCs have stem features such as self-renewal, high migration capacity, drug resistance, high proliferation abilities. A large body of evidence points to the fact that CSCs are particularly resistant to radiotherapy and chemotherapy. In HNSCC, CSCs have been increasingly shown to have an integral role in tumor initiation, disease progression, metastasis and treatment resistance. In the light of such observations, the present review summarizes biological characteristics of CSCs in HNSCC, outlines targeted strategies for the successful eradication of CSCs in HNSCC including targeting the self-renewal controlling pathways, blocking epithelial mesenchymal transition, niche targeting, immunotherapy approaches and highlights the need to better understand CSCs biology for new treatments modalities.

Blockage of IGF-1R signaling sensitizes urinary bladder cancer cells to mitomycin-mediated cytotoxicity

A major problem which is poorly understood in the management of bladder cancer is low sensitivity to chemotherapy and high recurrence after transurethral resection. Insulin-like growth factor 1 receptor (IGF-1R) signaling plays a very important role in progression, invasion and metastasis of bladder cancer cells. In this study, we investigated whether IGF-1R was involved in the growth stimulating activity and drug resistance of bladder cancer cells. The results showed: The mRNAs of IGF-1, IGF-2 and IGF-1R were strongly expressed in serum-free cultured T24 cell line, whereas normal urothelial cells did not express these factors/receptors or only in trace levels; T24 cell responded far better to growth stimulation by IGF-1 than did normal urothelial cells; blockage of IGF1R by antisense oligodeoxynucleotide (ODN) significantly inhibited the growth of T24 cell and enhanced sensitivity and apoptosis of T24 cells to mitomycin (MMC). These results suggested that blockage of IGF-IR signaling might potentially contribute to the treatment of bladder cancer cells which are insensitive to chemotherapy.

Applying a highly specific and reproducible cDNA RDA method to clone garlic up-regulated genes in human gastric cancer cells

AIM: To develop and optimize cDNA representational difference analysis (cDNA RDA) method and to identify and clone garlic up-regulated genes in human gastric cancer (HGC) cells. METHODS: We performed cDNA RDA method by using abundant double-stranded cDNA messages provided by two self-constructed cDNA libraries (Allitridi-treated and paternal HGC cell line BGC823 cells cDNA libraries respectively). Bam H I and Xho I restriction sites harbored in the library vector were used to select representations. Northern and Slot blots analyses were employed to identify the obtained difference products. RESULTS: Fragments released from the cDNA library vector after restriction endonuclease digestion acted as good marker indicating the appropriate digestion degree for library DNA. Two novel expressed sequence tags (ESTs) and a recombinant gene were obtained. Slot blots result showed a 8-fold increase of glia-derived nexin/protease nexin 1 (GDN/PN1) gene expression level and 4-fold increase of hepatitis B virus x-interacting protein (XIP) mRNA level in BGC823 cells after Allitridi treatment for 72h. CONCLUSION: Elevated levels of GDN/PN1 and XIP mRNAs induced by Allitridi provide valuable molecular evidence for elucidating the garlic's efficacies against neurodegenerative and inflammatory diseases. Isolation of a recombinant gene and two novel ESTs further show cDNA RDA based on cDNA libraries to be a powerful method with high specificity and reproducibility in cloning differentially expressed genes.

Adenovirus-mediated expression of pig α(1,3) galactosyltransferase reconstructs Gal α(1,3) Gal epitope on the surface of human tumor cells

Gal alpha(1, 3) Gal (gal epitope) is a carbohydrate epitope and synthesized in large amount by alpha(1, 3) galactosyltransferase [alpha(1, 3) GT] enzyme on the cells of lower mammalian animals such as pigs and mice. Human has no gal epitope due to the inactivation of alpha(1, 3) GT gene but produces a large amount of antibodies (anti-Gal) which recognize Gal alpha(1, 3) Gal structures specifically. In this study, a replication-deficient recombinant adenoviral vector Ad5sGT containing pig alpha(1, 3) GT cDNA was constructed and characterized. Adenoviral vector-mediated transfer of pig alpha(1, 3) GT gene into human tumor cells such as malignant melanoma A375, stomach cancer SGC-7901, and lung cancer SPC-A-1 was reported for the first time. Results showed that Gal epitope did not increase the sensitivity of human tumor cells to human complement-mediated lysis, although human complement activation and the binding of human IgG and IgM natural antibodies to human tumor cells were enhanced significantly after Ad5sGT transduction. Appearance of gal epitope on the human tumor cells changed the expression of cell surface carbohydrates reacting with Ulex europaeus I (UEA I) lectins, Vicia villosa agglutinin (VVA), Arachis hypogaea agglutinin (PNA), and Glycine max agglutinin (SBA) to different degrees. In addition, no effect of gal epitope on the growth in vitro of human tumor cells was observed in MTT assay.

Altered expression of nuclear matrix proteins in etoposide induced apoptosis in HL-60 cells

The events of cell death and the expression of nuclear matrix protein (NMP) have been investigated in a promyelocytic leukemic cell line HL-60 induced with etoposide. By means of TUNEL assay, the nuclei displayed a characteristic morphology change, and the amount of apoptotic cells increased early and reached maximun about 39% after treatment with etoposide for 2 h. Nucleosomal DNA fragmentation was observed after treatment for 4 h. The morphological change of HL-60 cells, thus, occurred earlier than the appearance of DNA ladder. Total nuclear matrix proteins were analyzed by 2-dimensional gel electrophoresis. Differential expression of 59 nuclear matrix proteins was found in 4 h etoposide treated cells. Western blotting was then performed on three nuclear matrix acssociated proteins, PML, HSC70 and NuMA. The expression of the suppressor PML protein and heat shock protein HSC70 were significantly upregulated after etoposide treatment, while NuMA, a nuclear mitotic apparatus protein, was down regulated. These results demonstrate that significant biochemical alterations in nuclear matrix proteins take place during the apoptotic process.

Targeting stem cells by radiation: From the biological angle to clinical aspects

Radiotherapy is a cornerstone of anticancer treatment. However in spite of technical evolutions, important rates of failure and of toxicity are still reported. Although numerous pre-clinical data have been published, we address the subject of radiotherapy-stem cells interaction from the clinical efficacy and toxicity perspective. On one side, cancer stem cells(CSCs) have been recently evidenced in most of solid tumor primary locations and are thought to drive radio-resistance phenomena. It is particularly suggested in glioblastoma, where CSCs were showed to be housed in the subventricular zone(SVZ). In recent retrospective studies, the radiation dose to SVZ was identified as an independent factor significantly influencing overall survival. On the other side, healthy tissue stem cells radio-destruction has been recently suggested to cause two of the most quality of life-impacting side effects of radiotherapy, namely memory disorders after brain radiotherapy, and xerostomia after head and neck radiotherapy. Recent publications studying the impact of a radiation dose decrease on healthy brain and salivary stem cells niches suggested significantly reduced long term toxicities. Stem cells comprehension should be a high priority for radiation oncologists, as this particular cell population seems able to widely modulate the efficacy/toxicity ratio of radiotherapy in real life patients.

Empirical Study on Chemotherapeutic Susceptibility of SP Cells in Human Pulmonary Adenocarcinoma Cell Line A549 in Vitro

OBJECTIVE To explore the chemotherapeutic susceptibility of SP cells in human pulmonary adenocarcinoma cell line A549 and the possible mechanism of multidrug resistance.METHODS SP and non-SP （NSP） cells in the cell line A549 were isolated by fluorescence activated cell sorter. The susceptibility of SP and NSP cells to DDP, 5-FU, VP16, NVB and GEM was detected by a drug susceptibility test, and IC50s were calculated 24 h a er the chemotherapy; and then a er a 2-hour IC50 treatment with 5 chemotherapeutic drugs on the 2 subsets of NSP cells, the intracellular drug levels were determined and analyzed using high performance liquid chromatograph.RESULTS There was no statistical signifi cance in comparison of the di. erences in IC50s and in intracellular drug levels a er DDP treatment between the 2 subsets （P 〉 0.05）, （P 〉 0.05）. However,all IC50s of the other 4 drugs were significantly higher in the SP cells than in the NSP cells （P 〈 0.01）. A er the chemotherapy, the intracellular drug levels of the other 4 drugs were significantly lower in SP cells than in NSP cells （P 〈 0.01）.CONCLUSION Compared to NSP cells, SP cells in the cell line A549 have stronger resistance to the chemotherapeutics. The multidrug resistance of SP cells closely correlates with the function of SP cells discharging chemotherapeutic agents.

盐酸双吗啡肽对耐药食管癌细胞迁移和侵袭能力的影响

目的 探讨骨形态发生蛋白(BMP)小分子抑制剂盐酸双吗啡肽(Dorsomorphin)对耐药食管癌EC109/PTX细胞迁移和侵袭能力的影响。方法 MTT实验检测不同浓度盐酸双吗啡肽对EC109/PTX细胞增殖的影响并确定后续实验的浓度。以筛选出的1μmol/L盐酸双吗啡肽的浓度作为试验组,同时设立空白对照组,处理EC109/PTX细胞48 h。采用流式细胞仪检测盐酸双吗啡肽对EC109/PTX细胞凋亡的影响。采用划痕实验和Transwell实验检测两组EC109/PTX细胞的迁移和侵袭能力。采用Western blotting实验检测两组EC109/PTX细胞中Vimentin、E-cadherin、N-cadherin蛋白相对表达水平。结果 1μmol/L盐酸双吗啡肽对EC109/PTX细胞的细胞抑制率为(9.89±1.12)%。培养第48小时时,对照组和实验组EC109/PTX细胞的凋亡率比较差异无显著性(P>0.05)。划痕实验和Transwell实验显示,与对照组相比,实验组EC109/PTX细胞的迁移率和细胞穿膜率显著降低(t=85.42、19.65,P<0.05)。Western blotting实验显示,与对照组相比,实验组细胞中Vimentin、N-cadherin蛋白相对表达量显著降低(t=19.40、41.79,P<0.05),N-cadherin蛋白表达量显著增高(t=58.12,P<0.05)。结论 BMP抑制剂盐酸双吗啡肽能影响耐药食管癌细胞中EMT相关蛋白表达,从而抑制耐药肿瘤细胞的迁移和侵袭。

肾血管平滑肌脂肪瘤合并肾静脉瘤栓行保肾手术治疗1例并文献复习

目的 探讨肾血管平滑肌脂肪瘤合并肾静脉瘤栓行肾部分切除术加瘤栓取出术的治疗效果。方法 总结合肥市滨湖医院2021年10月收治的1例肾血管平滑肌脂肪瘤合并肾静脉瘤栓病人的手术治疗方案。结果 病人术前行腹部增强磁共振加三维重建提示左肾占位(大小约51 mm×36 mm×55 mm)、左肾静脉瘤栓,考虑血管平滑肌脂肪瘤。于2021年10月21日行左肾部分切除术+肾静脉瘤栓取出术,病人术后第1天复查肾功能肌酐提示113μmol/L,术后4 d拔出肾周引流管,1周后拆线出院。病理结果:左肾肿瘤及肾静脉瘤栓均为血管平滑肌脂肪瘤。术后3个月复查肾功能提示69μmol/L。结论 合并静脉瘤栓的肾错构瘤病人通过个体化治疗,制定详细手术方案,可行保肾手术,病人受益更大。

MiR-181c-5p对卵巢癌干细胞样细胞肿瘤血管生成拟态的作用及其机制

目的探讨miR-181c-5p对卵巢癌干细胞样细胞(OCS-LCs)肿瘤血管生成拟态(VM)的作用及其机制。方法采用无血清悬浮培养法将人卵巢癌细胞系OVCAR3细胞诱导形成OCS-LCs。将OVCAR3细胞分为A~C组,各组分别转染NC-miR-181c-5p、siRNA-miR-181c-5p和pRNA-miR-181c-5p。通过成球实验评估A~C组细胞成球能力。采用实时荧光定量PCR(RT-qPCR)方法检测A~C组细胞miR-181c-5p的相对表达量,采用Western blot实验检测A~C组细胞Oct-4、Nanog、HIF-1α和VEGF蛋白相对表达量。采用CCK-8实验检测A~C组细胞的活性,采用三维立体培养实验检测A~C组的血管形成率。结果OVCAR3细胞成功被诱导形成OCS-LCs。RT-qPCR实验结果显示,B组细胞的miR-181c-5p相对表达量显著低于A组,C组高于A组(t=2.25、8.68,P<0.05)。成球实验结果显示,B组与A组、A组与C组相比,细胞的成球周期显著缩短,最大的细胞球直径显著增大,成球率显著增加(t=5.56~33.66,P<0.05)。Western blot实验结果表明,B组与A组、A组与C组相比,Oct-4、Nanog、HIF-1α和VEGF蛋白相对表达量显著升高(t=4.51~56.15,P<0.05)。CCK-8实验结果显示,B组的细胞活性高于A组,C组低于A组(F=97.70~281.80,P<0.05)。三维立体培养实验结果显示,B组与A组、A组与C组相比较,血管形成率显著性提高(t=3.70、18.67,P<0.05)。结论miR-181c-5p可能通过降低细胞中HIF-1α和VEGF蛋白的表达,从而抑制OCS-LCs的VM形成。

预测甲状腺乳头状癌颈部中央区淋巴结转移生物标志物研究进展

甲状腺癌作为常见的内分泌恶性肿瘤,发病率逐年上升。甲状腺乳头状癌作为其中最常见的病理分型,大部分病人预后较好,但颈部淋巴结转移作为其侵袭性特征,提示病人预后不良。目前国内外指南对于术前颈部淋巴结无明显转移征象病人是否需预防性行颈部中央区淋巴结清扫存在争议。液体活检具有便捷、无创等特点,多种血清标志物及基因突变靶点在甲状腺乳头状癌颈部淋巴结转移中的作用具有独特优势,并可联合影像学检查及细针穿刺活检提高诊断敏感性,但仍有不足之处。该研究就甲状腺乳头状癌颈部中央区淋巴结转移相关的部分生物标志物进行综述。

游离DNA甲基化在非肿瘤性疾病中的应用研究进展

游离DNA已成为新兴的、非侵入性的重要临床样本类型,游离DNA甲基化具有组织特异性,可以反映来源细胞的DNA甲基化状态,在临床疾病诊疗中可能成为重要的潜在标志物。该文旨在综述近年常用的游离DNA甲基化检测技术,以及游离DNA甲基化在神经退行性疾病、精神性疾病、心血管疾病、糖尿病和出生缺陷等非肿瘤疾病中的应用研究进展。

磁共振动态增强结合血循环肿瘤细胞、循环游离DNA对乳腺癌的临床诊断研究

目的探讨磁共振动态增强(DCE-MRI)结合血循环肿瘤细胞(CTCs)、循环游离DNA(cfDNA)对乳腺癌的诊断价值。方法选取沧州市人民医院2020年6月至2021年11月符合纳入标准的乳腺癌病人82例(乳腺癌组)。另选同期65例乳腺良性病变且未合并其他疾病者作为良性组。比较两组DCE-MRI定量参数、CTCs、cfDNA水平,对比MRI特征,分析DCE-MRI结合CTCs、cfDNA诊断乳腺癌的价值。结果乳腺癌组DCE-MRI定量参数速度常数(K^(trans))值、速率常数(K_(ep))值、Alu247/115水平及CTCs计数分别为(0.18±0.04)min、(1.32±0.27)min、(12.97±2.14)个/毫升、0.97±0.32,比良性组高(0.05±0.01)min、(0.51±0.11)min、(10.15±1.45)个/毫升、0.55±0.12(P<0.05)。良性组边缘多光滑,形状规则,内部强化以均匀为主,时间-信号强度曲线(TIC)以Ⅰ型多见,早期增强率<60%;乳腺癌组边缘毛刺征、形状不规则,内部不均匀强化为主,以TIC分型Ⅲ型多见,早期增强率<60%占比高。两组MRI形态表现比较差异有统计学意义(P<0.05)。淋巴结转移、Ⅲ~Ⅳ期者CTCs数量、Alu247/115水平明显高于无淋巴结转移、Ⅰ~Ⅱ期者(P<0.05)。受试者操作特征(ROC)曲线分析结果显示,三者联合(DCE-MRI+CTCs+cfDNA)诊断乳腺癌的曲线下面积(AUC)、灵敏度、特异度分别为0.86、0.93、0.84,诊断效果优于单一检测CTCs、cfDNA检测(P<0.05)。结论乳腺癌病人CTCs、cfDNA存在异常表达,可能与病人临床分期、淋巴结转移有关,相对单一实验室检测,DCE-MRI结合CTCs、cfDNA检测能获取更多可靠信息。

circVANGL1/miR-134-5p/CDCA3轴调控乳腺癌干细胞增殖、迁移、侵袭的机制研究

目的探讨circVANGL1/miR-134-5p/细胞分裂周期相关因子3(CDCA3)轴调控乳腺癌干细胞增殖、迁移、侵袭的机制。方法收集2021年2月至2023年11月治疗乳腺癌患者的乳腺癌组织及相对应癌旁组织。体外培养乳腺癌MCF-7细胞干细胞亚群,根据不同处理方法将其分为Con组、si-NC组、si-circVANGL1组、pcDNA组、pcDNA-circVANGL1组、miR-NC组、miR-134-5p组、anti-miR-NC组、anti-miR-134-5p组、si-circVANGL1+anti-miR-134-5p组、si-circVANGL1+pcDNA-CDCA3组。采用qRT-PCR检测circVANGL1、miR-134-5p和CDCA3 mRNA在乳腺癌组织、癌旁组织及各组乳腺癌干细胞中的表达水平;Western blot检测CDCA3、基质金属蛋白酶-2(MMP-2)、基质金属蛋白酶-9(MMP-9)蛋白表达水平。双荧光素酶报告实验验证circVANGL1与miR-134-5p、miR-134-5p与CDCA3靶向关系;CCK-8实验检测乳腺癌干细胞增殖活性,划痕实验检测细胞迁移能力,克隆形成实验检测细胞克隆形成能力,Transwell小室实验检测细胞侵袭能力。结果与癌旁组织比较,乳腺癌组织中circVANGL1、CDCA3 mRNA、CDCA3蛋白表达水平较高,miR-134-5p表达水平较低(P<0.05)。circVANGL1可靶向调控miR-134-5p的表达,miR-134-5p可靶向调控CDCA3蛋白的表达。干扰circVANGL1表达后,乳腺癌干细胞增殖活性、划痕愈合率、细胞克隆形成数、侵袭细胞数以及MMP-2、MMP-9蛋白表达水平均明显降低(P<0.05)。下调miR-134-5p表达或过表达CDCA3可部分逆转干扰circVANGL1对乳腺癌干细胞增殖、迁移、侵袭的作用(P<0.05)。结论circVANGL1可能通过miR-134-5p/CDCA3轴调控乳腺癌干细胞的增殖、迁移、侵袭。

三阴性乳腺癌EGFR、Ki-67、P53及CTC表达与预后的关系研究

目的探讨三阴性乳腺癌表皮生长因子受体(EGFR)、细胞核增殖相关抗原Ki-67(Ki-67)、P53及循环肿瘤细胞(CTC)表达与预后的关系。方法选取95例三阴性乳腺癌患者,免疫组化检测病理组织标本中EGFR、Ki-67、P53表达;所有患者接受8个周期化疗,采用膜滤过分离肿瘤细胞技术(ISET)检测化疗前后的CTC表达,并分析化疗前后CTC表达与化疗疗效的关系;分析CTC与EGFR、Ki-67、P53表达的关联性;随访患者无进展生存期(PFS),采用COX回归分析三阴性乳腺癌进展的危险因素。结果EGFR、Ki-67、P53阳性检出率分别为44.21%(42/95)、63.16%(60/95)、56.84%(54/95);化疗后患者的CTC阳性检出率(14.74%)低于化疗前(61.05%,P<0.05);化疗疗效与化疗后CTC阳性表达呈负相关(P<0.001);COX回归分析显示,临床分期为Ⅲ期、EGFR阳性、化疗后CTC阳性是三阴性乳腺癌进展的独立危险因素(P<0.05);不同临床分期患者PFS比较,Ⅰ期>Ⅱ期>Ⅲ期,EGFR阳性患者PFS短于阴性患者,化疗后CTC阳性患者PFS短于阴性患者(P<0.05)。结论化疗前EGFR阳性表达、化疗后CTC阳性表达与三阴性乳腺癌患者预后差有关,化疗后CTC阳性率越低患者化疗疗效越好。

rAAV/CEA转染树突状细胞诱导特异性CTL杀伤MCF-7细胞系CD44~＋CD24^(-/low)乳腺癌干细胞

目的:携带癌胚抗原(carcinoembryonic antigen,CEA)基因的重组人腺相关病毒(reconstructive human ade-no-association virus,rh-AAV)感染树突状细胞(dendritic cell,DC)诱导获得抗原特异性细胞毒性T淋巴细胞(cyto-toxic lymphocyte,CTL),体外检测其对CD44+CD24-/low乳腺癌干细胞的杀伤效果。方法:分离供者外周血单个核细胞,以细胞因子白介素-4(interleukin-4,IL-4)、粒细胞-巨噬细胞克隆刺激因子(granulocyte-macrophage colony-stimu-lating factor,GM-CSF)和肿瘤坏死因子α(tumor necrosis factor-alpha,TNF-α)诱导培养获得DC,细胞因子白介素-2(interleukin-2,IL-2),刺激培养获得T淋巴细胞。含CEA基因的rh-AAV感染培养DC,诱导成熟后将DC和T细胞混合培养获得CTL细胞。流式分选MCF-7和MA-MDB-231细胞系中CD44+CD24-/low乳腺癌干细胞,MTT法检测CTL细胞对CD44+CD24-/low乳腺癌干细胞的杀伤效果。结果:MCF-7和MDA-MB-231中CD44+/CD24-/low亚群比例分别为5.1%和76.3%。CEA基因转染DC诱导的CTL细胞对表达CEA抗原的MCF-7杀伤率为46.5%±15.0%,与未转染组相比,差异有统计学意义(P=0.009);对MCF-7细胞中分选的CD44+CD24-/low乳腺癌干细胞的杀伤率为44.7%±28.2%,明显高于未转染组。对非乳腺癌干细胞杀伤率为50.6%±22.2%,与未转染组相比,差异有统计学意义(P=0.05)。在不表达CEA基因的MDA-MB-231乳腺癌细胞,CEA转染诱导的CTL细胞对未分选细胞、分选的CD44+/CD24-/low亚群和非干细胞亚群的杀伤率与未转染的对照组相比,差异均无统计学意义(P>0.05)。结论:携带CEA基因rh-AAV转染DC诱导产生的抗原特异性CTL细胞可杀伤表达CEA的乳腺癌细胞,对CD44+CD24-/low乳腺癌干细胞也具有一定的杀伤活性,提示免疫治疗可能是治疗乳腺癌干细胞潜在有效的手段。

人宫颈癌组织中CK17和P63蛋白的表达及意义

目的:研究宫颈储备细胞标记物CK17及P63蛋白在人宫颈癌组织中的表达情况,判定其成为宫颈癌干细胞标记物的可能性。方法:采用免疫组织化学染色法检测55例人宫颈鳞状细胞癌组织及20例正常人宫颈组织中CK17及P63蛋白的表达情况。结果:①CK17蛋白表达于正常宫颈组织鳞柱交接的储备细胞胞浆;在宫颈癌组织中,CK17蛋白表达于部分宫颈癌细胞胞浆,表达部位主要位于瘤栓中、肿瘤浸润的前沿及边缘部位;在恶性度较高的宫颈癌中,CK17蛋白表达率明显高于恶性度较低的宫颈癌组(P<0.05);在化疗后的标本组织中,CK17蛋白的表达率也较化疗前明显升高(P<0.05)。②P63蛋白表达于正常宫颈组织鳞柱交接的储备细胞的胞核中;在宫颈癌组织中,几乎所有的宫颈癌细胞均表达P63蛋白。结论:CK17蛋白在伴有转移、浸润、低分化及化疗后的病例中表达的阳性率明显升高,且趋于表达在瘤栓中、肿瘤浸润的前沿及边缘部位,可能是宫颈癌干细胞的标记物;P63蛋白几乎表达于所有宫颈癌细胞中,表达无规律性,可能不是宫颈癌干细胞的标记物。