Clinical application of DNA ploidy to cervical cancer screening: A review

Screening for cervical cancer with DNA ploidy assessment by automated quantitative image cytometry has spread throughout China over the past decade and now an estimated 1 million tests per year are done there. Compared to conventional liquid based cytology, DNA ploidy has competitive accuracy with much higher throughput per technician. DNA ploidy has the enormous advantage that it is an objective technology that can be taught in typically 2 or 3 wk, unlike qualitative cytology, and so it can enable screening in places that lack sufficient qualified cytotechnologists and cytopathologists for conventional cytology. Most papers on experience with application of the technology to cervical cancer screening over the past decade were published in the Chinese language. This review aims to provide a consistent framework for analysis of screening data and to summarize some of the work published from 2005 to the end of 2013. Of particular interest are a few studies comparing DNA ploidy with testing for high risk human papilloma virus(hrH PV) which suggest that DNA ploidy is at least equivalent, easier and less expensive than hrH PV testing. There may also be patient management benefits to combining hr HPV testing with DNA ploidy. Some knowledge gaps are identified and some suggestions are made for future research directions.

Relationship between DNA ploidy, expression of ki-67 antigen and gastric cancer metastasis

AIM To evaluate the relationship between the expression of Ki 67 antigen and the pathobiological behaviours of gastric cancers especially their distant metastases. METHODS Fifty six specimens of gastric cancer routinely fixed in formalin and embedded in paraffin (FFEP) were studied by immunohistochemical method. RESULTS Expression of Ki 67 antigen was significantly related to the distant metastases to liver, ovary and adrenal gland ( P <0 005), but not related to the histological type, growth pattern, depth of invasion, histological differentiation and the metastases to local lymph nodes ( P >0 05). Furthermore, the Ki 67 antigen expression was significantly related to the DNA aneuploidy pattern, which is closely related to poor prognosis ( P <0 05). CONCLUSION Overexpression of Ki 67 can be used as an objective marker of the proliferative activity for predicting prognosis of gastric cancer and metastatic potential to distant organs.

DNA ploidy analysis and expression of MMP-9, TIMP-2, and E-cadherin in gastric carcinoma

AIM： To investigate DNA ploidy and expression of MMP-9, TIMP-2, and E-cadherin in gastric carcinoma and to explore the mechanism of invasion and metastasis of gastric carcinoma. METHODS： Immunohistochemical methods were used to detect the expressions of MMP-9, TIMP-2, and E-cadherin in 156 cases, including 99 cases of gastric carcinoma, 16 cases of adjacent noncancerous mucosa, 16 cases of distant metastases and 25 cases of metastatic lymph node （LN） from gastric carcinoma. Flow cytometry DNA ploidy and S-phase fraction （SPF） analysis were performed on 57 cases, including 47 cases of gastric cancer, 6 cases of adjacent noncancerous mucosa, and 4 cases of distant metastatic cancer. RESULTS： The expression of MMP-9 was significantly correlated with Lauren＇s classification, Borrmann＇s classification, LN metastasis, tumor metastasis, and TNM stage, as well as depth of invasion （all P〈0.05）. The positive rate was lower in noncarcinoma than in carcinoma （31.3% vs 66.7%, P〈0.01）. The expression of TIMP-2 was significantly correlated with Borrmann＇s classification, LN metastasis, and the depth of invasion （all P〈0.05）. The expression of E-cadherin was significantly correlated with differentiation, Lauren＇s classification, Borrmann＇s classification, and LN metastasis, as well as the depth of invasion （P〈0.01 or P〈0.05）. E-cadherin was less expressed in carcinoma than in noncarcinoma （42.4% vs 87.5%, P〈0.01）. There was a positive correlation between MMP-9and TIMP-2 and a negative correlation between MMP-9 and E-cadherin, but no correlation between TIMP-2 and E-cadherin. Also there was a positive correlation between DNA aneuploid rate and differentiation and LN metastasis. SPF that was higher than 15% was positively correlated with tumor size, differentiation and LN metastasis. And there was a significant difference between carcinoma and noncarcinoma in DNA aneuploid rate and SPF. CONCLUSION： With tumor progression and development of heterogeneity, the abnormal expressions of MMP-9, TIMP-2, and E-cadherin or DNA aneuploid rate or high SPF gradually increases, suggesting that they play a crucial role in gastric carcinoma progression. 2005 The WJG Press and Elsevier Inc. All rights reserved

Analysis of DNA Ploidy, Cell Cycle and Ki67 Antigen in Nasopharyngeal Carcinoma by Flow Cytometry

Summary: The expression of DNA ploidy, the cell cycle and Ki67 antigen in nasopharyngeal carcinoma (NPC) were studied and their relationship with the clinical biological behaviors and prognosis of NPC was evaluated. Biopsied specimens of NPC were made into cell suspension. By using cytometric double labeling Ki67 and DNA method, the expression of DNA ploidy, the cell cycle and Ki67 antigen were analyzed. The patients were followed-up for about 3 years and the relationship between the above-mentioned parameters and the clinical biological behavior and prognosis of NPC were evaluated. Of the 62 cases of NPC, the DNA aneuploid accounted for 29.03 %. The S phase cells accounted for 0 to 54 % in the cell cycle and the positive expression of Ki67 ranged from 0 to 52 %. There were 40 cases of LPI (64.5 %) including 15 negative cases and 22 cases of HPI (35 5 %) respectively. The DNA anueploid content was positively related to the S phase cells. The patients having a low expression of Ki67 or DNA aneuploid in tumor cells were not sensitive to chemotherapy, liable to metastasis to distant organs and had a poor prognosis, while Ki67 showed no correlation with DNA ploidy and the cell cycle. It was suggested that DNA ploidy and Ki67 could be used as an independent and objective marker to evaluate the radiosensitivity and prognosis of NPC.

DNA PLOIDY，EXPRESSION OF p53 PROTEIN AND METASTATIC BEHAVIOUR OF GASTRIC CARCINOMA

DNA ploidy of 57 gastric carcinomas with metastases(12 liver,1 adrenal,4 ovary and 48 lymph node) were measured by flow cytometry.DNA anueploidy was significantly related to liver metastases:9 out of 12 gastric carcinomas with liver metastases were anueploid(75%) as compared to 13 out of 45(28.8%) of cases without liver metastases(P<0.01);the one gastric carcinoma with adrenal metastasis was also anueploid.DNA ploidy was not related to ovarian or lymph node metastases.Another interesting finding was that all of 3 gastric carcinomas with liver metastases which showed a diploid DNA pattern,expressed p53 protein, while all of 3 carcinomas with liver metastases but no p53 protein expression were anueploid.The expression of p53 protein was not related to ovarian metastases.The results suggested that an anueploid DNA pattern and the expression of p53 protein are both objective markers valuable in predicting high risk potential of metastases to the liver,and that the combined detection of these markers can be a most useful method in the follow-up of Patients with gastric carcinoma in detecting those at high risk of developing metastases following surgical resection.Also the poorer prognosis of Patients with gastric carcinoma showing an anueploid DNA pattern may be related to the development of distant organ metastases through the blood vascular system.Furthermore,the clone of gastric carcinoma cells which accumulate p53protein or show an anueploid DNA pattern may have a causative role in the development of liver(&.adrenal) metastases.

THE CLINICAL PATHOLOGY AND DNA PLOIDY OF GASTRICMUCOSA ASSOCIATED LYMPHOID TISSUE (MALT)LYMPHOMA INFILTRATING THE LEIOMYOMASOF THE UTERUS

Objective: To investigate the clinicopathology and DNA ploidy of gastric mucosa associated lymphoid tissue (MALT) lymphoma infiltraving the leiomyomas of the uterus of a patient. Methods: The routine paraffin slides were cut, stained with HE, immunochemically by ABC methodusing the and stained by Feulgen method. Then the DNA ploidy of tumor cells was measured with an image cytometer. Results: In the mucosa, submucosa and the smooth muscle layer of the stomach and in the leiomyomas of the uterus there was diffusive and dense infiltration of centrocyte-like cells. The DNA measurement results were that the distribution of DNA mass of lymphoma cells in stomach and in lymph nodes had a single main aneuploidy peak each, and the distribution of DNA mass of lymphoma cells in leiomyomas of uterus had two peaks; one of them was the diploid, the other aneuploid. Conclusion: The MALT lymphoma cell invasion in uterus must be differentiated with a primary lymphoma in the uterus, the chronic lymphocyte leukemia in uterus and an endometrial stromal sarcoma. The present prognosis of the patient under discussion was poor. The follow-up results indicated the DNA index seemed to be important for predicting the malignancy degree and prognosis.

PROGNOSTIC SIGNIFICANCE OF DNA PLOIDY IN PATIENTS WITH STAGE II COLORECTAL CANCER

Objective: To evaluate the relationship between flow cytometric DNA ploidy, biological features and prognosis in patients with Stage II colorectal cancer. Methods: Nuclear DNA content, proliferation index and S-phase fraction were measured in a prospective series of 45 patients with curatively resected Stage II colorectal adenocarcinomas by means of flow cytometry using frozen tumor samples. Results: Of the 45 samples examined, 17 tumors (38%) were diploid and 28 (62%) aneuploid. The diploid tumors were significantly more common in the proximal colon than in the distal colon (67% vs. 23%; P<0.01). There was no correlation between DNA ploidy and the other clinicopathological variables (P>0.05). The proliferation index and S-phase fraction in the distal tumors were higher than those in the proximal tumors, but the difference was not significant (P>0.05). When the 5-year survival rate of patients with Stage II colorectal cancer was compared by the log rank test, a significant relationship between DNA ploidy status and disease free survival was observed in the group of all patients. Patients with DNA diploid tumors had a better disease free survival than those with DNA aneuploid tumors (P<0.05). Conclusion: These findings support that DNA ploidy status, proliferation index and S-phase fraction may differ in the proximal and distal colorectal cancer. Flow cytometric DNA ploidy status might be a useful prognostic factor in patients with Stage II colorectal cancer.

DNA PLOIDY AND p53 EXPRESSION ASSOCIATED WITH TUMOR SITE AND LYMPH NODE METASTASIS IN COLORECTAL CANCER

Objective: To study the association of DNA ploidy abnormality and p53 overexpression with the carcinogenesis of colorectal cancer. Methods: DNA ploidy and p53 expression were measured in a series of 42 colorectal adenocarcinomas by means of flow cytometry and immunohistochemical test. Results: 17 tumors (40%) were diploid and 25 (60%) aneuploid. The aneuploid tumors were significantly more common in the distal colon than in the proximal colon (P<0.01). Aneuploidy was significantly associated with lymph node metastasis (P<0.05). There was no correlation between DNA ploidy and the other clinicopathological variables. Of the 22 samples examined, the positive rate of p53 expression was 59% (13/22). p53 expression was more frequently observed in the distal tumors (11/13) than in the proximal tumors (2/9) (P<0.05). Conclusion: Our data support the hypothesis that the carcinogenesis of colorectal cancer might differ in proximal and distal tumors. DNA ploidy abnormality and p53 overexpression may play an important role in the development of distal colorectal cancer.

Correlative Study on the Expression of p53 and DNA Ploidy in Acute Nonlymphocytic Leukemia

We used the flow cytometric immunoassay to study the correlation between the tumor-suppressor gene product p53- and the DNA ploidy in 30 de novo cases of acute nonlymphocytic leukemia (ANLL).The results showed that 15 cases were negative and the other 15 cases were positive expression for p53. As compared with p53 negative (p53) cases, the patients with positive p53 (p53+) had higher percentage of bone marrow blasts and lower peripheral leukocyte and platelet counts,which had no influence on the complete remission rate. Before treatment, DNA diploidy was seen in 18 cases including 12 p53- cases, and DNA aneuploidy in 12 cases including 9 p53+. After therapy, aneuploidy could be transformed into diploidy.Patients with P53+ or having aneuploidy in complete remission were at risk for early relapse. We believe that p53 may be involved in the process of leukemogenesis and progression of ANLL.

DNA倍体分析、液基细胞学检测对宫颈高危型HPV感染患者分流的应用分析

目的探讨DNA倍体分析、液基细胞学检测(TCT)在宫颈高危型HPV感染患者中的诊断价值。方法回顾性分析2022年1月至2023年8月于南京大学医学院附属苏州医院收治的182例高危型HPV感染者,以活检病理为诊断金标准,观察和比较DNA倍体分析、TCT检测2种方法对宫颈病变的检测结果。结果182例宫颈活检中,炎症或HPV感染84例,LSIL69例,HSIL+癌(鳞状细胞癌2例)29例。DNA倍体分析、TCT≥ASCUS的阳性率分别为78.02%(142/182)、57.14%(104/182),两者差异无统计学意义(P>0.05)。在不同级别的宫颈病变中,DNA倍体分析的阳性率均高于TCT≥LSIL,在炎症或HPV感染中DNA倍体分析的阳性率高于TCT≥ASCUS,差异均有统计学意义(均P<0.05)。以活检病理诊断结果为金标准,TCT的特异性72.62%(61/84)和Kappa值0.556均高于DNA倍体分析的特异性28.57%(24/84)和Kappa值0.127。结论在宫颈HPV感染患者的分流中,TCT的诊断效能优于DNA倍体分析,两者联合检测具有更好的分流和诊断价值。

Correlated Flow Cytometric Analysis of H－ras p21 and DNA Ploidy in Acute Myelogenous Leukemia

The flow cytometric immunoassay was used to study the correlation between the H-ras oncogene product p21 and the DNA ploidy in 30 de novo cases of acute myelogenous leukemia (AML). The results showed that 17 cases were negative for p21 expression and 13 positive for p21. The patients with positive p21 had higher percentage of bone marrow and peripheral blasts and lower peripheral leukocyte count. The expression of p21 had no influence on the therapeutic effect. Before treatment,DNA diploidy occurred in 18 cases including 13 p21 negative ones,and DNA aneuploidy was revealed in 12 cases including 8 p21 positive ones. Patients with positive p21 or having aneuploidy in complete remission were at risk for early relapse. Our results suggest that p21 may be involved in the process of leukemogenesis and progression in AML.

HPV阳性女性中宫颈液基细胞学、DNA倍体分析及P16/Ki-67双染检测对宫颈癌前病变的分流效果研究

目的探讨在HPV阳性女性中,液基细胞学、DNA倍体分析及P16/Ki-67双染检测对宫颈癌前病变的分流作用。方法回顾性分析2021年5月至2022年12月在我院妇科行阴道镜及宫颈活检的妇女590例。患者高危人乳头瘤病毒(human papilloma virus,HPV)检测阳性,且行液基细胞学(liquid-based cytology,LBC)、DNA倍体分析、P16/Ki-67双染3种检查,对上述3种方法的灵敏度、特异性、受试者工作特征(receiver operating characteristic,ROC)曲线进行统计分析。结果液基细胞学、DNA倍体分析和P16/Ki-67双染3种筛查方法对宫颈癌前病变的灵敏度分别为84.2%、77.5%、76.4%,特异性分别为40.7%、49.2%、70.1%,曲线下面积(area under the curve,AUC)分别是0.625、0.634、0.733,其中,P16/Ki-67双染检测显著优于液基细胞学检查及DNA倍体分析(P<0.0001)。结论本研究认为,在HPV阳性女性中,P16/Ki-67双染检测的分流效果最佳。

DNA倍体分析对液基细胞学在良恶性胸腹水诊断中的支持价值

目的:探讨液基细胞学、肿瘤标志物和DNA倍体分析单独和联合在良恶性胸腹水诊断中的鉴别价值。方法:收集312例同时做过胸腹水液基细胞学检查、DNA倍体分析和血清肿瘤标志物检测的病例,且所有病例都有组织病理诊断结果,对这些指标及人口统计学特征进行分析;基于液基细胞学、肿瘤标志物、DNA倍体分析单独及其组合的诊断,通过Logistic回归建立组合模型,并通过ROC曲线下面积(AUC)进行比较,以及计算其对应的敏感度(SE)、特异度(SP)、阳性预测值(PPV)和阴性预测值(NPV)。结果:以组织病理诊断结果为金标准,液基细胞学、肿瘤标志物和DNA倍体分析的AUC值分别是0.702、0.512、0.776;模型1(液基细胞学联合肿瘤标志物)AUC值为0.722,SE为49.8%,SP为90.6%,PPV为79.5%,NPV为24.5%;模型2(液基细胞学联合DNA倍体分析)AUC值为0.783,SE为68.7%,SP为83.00%,PPV为95.2%,NPV为35.2%;模型3(模型2联合肿瘤标志物)AUC值0.776,SE为58.7%,SP为88.7%,PPV为85.3%,NPV为29.8%;模型2表现出对良恶性胸腹水最高的诊断效率,液基细胞学和DNA倍体分析组合的AUC值高于液基细胞学(P<0.0001)和DNA倍体分析(P=0.3998)。结论:DNA倍体分析的诊断价值高于液基细胞学和传统肿瘤标志物;DNA倍体分析对液基细胞学在良恶性胸腹水的诊断中具有支持价值,提供了一种鉴别良恶性胸腹水的可靠模式。

DNA倍体定量分析结合P16蛋白在宫颈癌筛查中的意义

目的:探讨DNA定量分析结合P16蛋白免疫组化染色在宫颈筛查中的意义。方法:选取2020年3月~2021年3月淮安市肿瘤医院门诊及住院检查病例4334例为研究对象,对宫颈细胞学DNA定量分析提示异常者,在知情同意情况下,进行阴道镜下宫颈活检、组织学病理检查及P16蛋白染色检查,比较分析DNA倍体定量分析提示异常者与其组织学病理之间的关系,以及P16蛋白表达与病理组织学之间的关系,以评价衡量DNA定量分析结合P16染色在宫颈癌筛查中的意义。结果:4334例中369例查出倍体异常,369例倍体异常中202例建议阴道镜活检,发现150例为CIN1级以上,同时对活检202例进行P16蛋白染色发现随着病变级别增高,P16表达百分比也随之上升,通过χ2检验发现P16蛋白在宫颈上皮内瘤变中表达有明显统计学意义(P<0.05)。结论:DNA倍体定量分析在宫颈癌筛查中有一定意义,同时结合P16蛋白免疫组化染色及宫颈活检,对发现早期宫颈病变有意义。

基于流式细胞术的蜘蛛抱蛋属植物倍性检测和核DNA含量测定体系的建立

为建立适用于蜘蛛抱蛋属植物的倍性检测及其核DNA含量的流式细胞术方法,以蜘蛛抱蛋属植物成熟叶片为材料,比较了WPB解离液、LB01解离液、Galbraith’s解离液以及改良Galbraith’s解离液制备的细胞核悬液的效果。结果表明:改良Galbraith’s解离液能够更广泛地适用于蜘蛛抱蛋属植物成熟叶片的细胞核悬液的制备且效果较好。利用改良Galbraith’s解离液对12种13个居群的蜘蛛抱蛋属植物进行倍性检测,并通过染色体制片计数法进行验证。结果表明:12种蜘蛛抱蛋属植物的DNA含量的荧光强度峰值范围为1753078.81~5817826.99。其中,11种二倍体植物的峰值范围为1753078.81~2937690.80,四倍体辐花蜘蛛抱蛋的峰值为3892503.69,六倍体泰国蜘蛛抱蛋的峰值为5817826.99。此外,以葱为内标,对以上蜘蛛抱蛋属植物的核DNA含量进行测定和估算,首次估测了11种蜘蛛抱蛋植物的核DNA含量,蜘蛛抱蛋的DNA含量与已有报道的结果相近。其中,二倍体植物的核DNA含量为14.16~18.73 Gb;四倍体辐花蜘蛛抱蛋的核DNA含量为28.33 Gb;六倍体泰国蜘蛛抱蛋的核DNA含量为43.03 Gb。结果可为蜘蛛抱蛋属植物的遗传育种研究、全基因组研究以及喀斯特植物的起源与演化研究提供重要科学依据。

胸水DNA倍体联合细胞角蛋白-19片段检测对良恶性肺部疾病的鉴别诊断意义

目的探讨胸水DNA倍体联合细胞角蛋白-19片段(CYFRA-21-1)检测对良恶性肺部疾病的鉴别诊断意义。方法回顾性分析2021年5月1日至2023年12月1日浙江省荣军医院收治确诊为非小细胞肺癌伴胸水的患者78例作为病例组,同时纳入同期入院存在胸水的肺部良性疾病患者50例作为对照组。对所有患者的胸水及外周血标本进行DNA倍体及CYFRA-21-1阳性率的检测,并统计比较外周血及胸水标本中DNA倍体、CYFRA-21-1单一检测与联合检测的效能。结果病例组胸水、外周血的DNA倍体和CYFRA-21-1阳性率均明显高于对照组,差异均有统计学意义(均P<0.05);病例组胸水DNA倍体和CYFRA-21-1的阳性率均明显高于外周血,差异均有统计学意义(均P<0.05);胸水DNA倍体联合CYFRA-21-1鉴别良恶性肺部疾病的AUC为0.980,大于单一指标胸水DNA倍体的AUC 0.964和胸水CYFRA-21-1的AUC 0.900,差异均有统计学意义(均P<0.05);胸水DNA倍体联合CYFRA-21-1检测鉴别良恶性肺部疾病的灵敏度为1.00,特异度为0.96,准确度为0.98。结论肺癌患者胸水出现DNA异常增殖及CYFRA-21-1阳性率增高且远早于外周血标本,胸水DNA倍体及胸水CYFRA-21-1联合检测有助于提高良恶性肺部疾病的鉴别诊断效能,值得予以重视应用。

DNA倍体定量分析、HPV E6/E7 mRNA检测及HPV筛查在宫颈病变诊断中的价值

目的比较分析宫颈病变筛查中人乳头瘤病毒(human papilloma virus,HPV)DNA基因分型检测、DNA倍体定量分析、HPV E6/E7 mRNA检测的价值。方法选取宫颈病变筛查者258例作为研究对象,均接受HPV DNA基因分型检测、HPV E6/E7 mRNA、DNA倍体定量分析及宫颈组织病理检查,对比DNA倍体定量分析、HPV E6/E7 mRNA检测、HPV DNA基因分型检测与宫颈组织病理检查结果,统计分析DNA倍体定量分析、HPV E6/E7 mRNA检测、HPV DNA基因分型检测的价值。以宫颈组织病理检查为金标准。结果DNA倍体定量分析的灵敏性为70.00%(42/60),特异性为77.27%(153/198),准确性为75.58%(195/258),阳性预测值为48.28%(42/87),阴性预测值为89.47%(153/171)。HPV E6/E7 mRNA检测的灵敏性为86.67%(52/60),特异性为59.60%(118/198),准确性为65.89%(170/258),阳性预测值为39.39%(52/132),阴性预测值为93.65%(118/126)。HPV DNA基因分型检测的灵敏性为95.00%(57/60),特异性为39.39%(78/198),准确性为52.33%(135/258),阳性预测值为32.20%(57/177),阴性预测值为96.30%(78/81)。HPV DNA基因分型检测的灵敏性、阴性预测值均高于DNA倍体定量分析、HPV E6/E7 mRNA检测,特异性、准确性、阳性预测值均低于DNA倍体定量分析、HPV E6/E7 mRNA检测(P<0.05),HPV E6/E7 mRNA检测的灵敏性、阴性预测值均高于DNA倍体定量分析,特异性、准确性、阳性预测值均低于DNA倍体定量分析(P<0.05)。结论宫颈病变筛查中HPV DNA基因分型检测的价值高于DNA倍体定量分析及HPV E6/E7 mRNA检测,值得应用。

DNA倍体定量分析、HPV检测和液基细胞学在宫颈癌筛查中的应用价值

目的探究DNA倍体定量分析、人乳头瘤病毒(HPV)检测和液基细胞学(TCT)在筛查宫颈癌中的应用价值。方法选取120例宫颈癌筛查患者,予DNA倍体定量分析、HPV检测、TCT检测,以病理学检测为诊断金标准,计算并分析各检测方式的诊断效能。结果DNA倍体定量分析、HPV检测、TCT检测阳性率分别为68.33%、71.67%、72.50%,联合检测阳性率为70.83%。联合检测敏感度、诊断符合率高于DNA倍体定量分析、HPV检测、TCT检测(P<0.05)。联合检测诊断效能高于DNA倍体定量分析、HPV检测、TCT检测(P<0.05)。结论DNA倍体定量分析、HPV检测和TCT检测均能有效筛查宫颈癌,但联合检测诊断效能更高,可实现宫颈癌早发现早治疗,降低宫颈癌发病率和病死率,值得临床推广与应用。

三个鲫品系DNA含量的比较研究

采用流式细胞术 (FCM)对红鲫、彭泽鲫、异育银鲫进行红血球DNA含量的检测分析比较 ,以鉴定它们的倍性。结果显示 ,红鲫红血球的DNA含量是 3 0pg ,彭泽鲫是 4 7pg ,异育银鲫是 4 8pg。显而易见 ,彭泽鲫的DNA含量是二倍体红鲫的 1 57倍 ,异育银鲫的DNA含量是红鲫的 1 6倍。采用肾细胞直接制作染色体的方法进行红鲫、彭泽鲫、异育银鲫的染色体倍性鉴定 ,结果红鲫的染色体数目是 10 0 ,为二倍体 (2n =10 0 ) ,彭泽鲫的染色体数目是 162 ,为三倍体 (3n =162 ) ,异育银鲫的染色体数目是 156— 162 ,为三倍体 (3n =156— 162 )。研究证明

鼻咽癌DNA倍体、增殖指数对预后的预测意义(英文)

背景与目的:放射治疗是鼻咽癌的基本治疗方法,改变分割次数放疗及化学治疗已成为晚期鼻咽癌综合治疗方案的一部份,但是,已知的预后因素在预测鼻咽癌治疗结果时有较大的偏差,本研究采用流式细胞仪测定鼻咽癌肿瘤细胞DNA含量及增殖指数,确定其能否成为判断预后的参考指标。方法:对1994年至1995年间205例石腊包埋存档的鼻咽癌活检组织块进行DNA倍体、细胞增殖指标包括S-期细胞分数、G2/M期细胞分数及增殖细胞期分数的测定并与相应病人的临床参数及预后进行相关分析。结果:205例检测的标本中,117例肿瘤活检组织符合DNA流式细胞仪会议指南标准,其中35例(30%)为异倍体肿瘤,82例(70%)为二倍体肿瘤,DNA倍体及各增殖指数与年龄、性别、病理类型、T/N分期及临床分期无显著性相关。异倍体肿瘤的S期细胞分数及增殖期细胞分数显著高于二倍体肿瘤,5年无瘤生存率亦存在显著差异(43%verse62%P=0.035)。低、中、高S期细胞分数组及增殖期细胞分数组,5年无瘤生存率分别存在显著性差异(81%verse61%verse21%;77%verse62%verse33%,P=0.000及P=0.048)。低、中、高G2/M期细胞分数组,5年无瘤生存率无明显差异(35%verse58%verse54%,P=0.8617)。结论:DNA倍体、S期细胞分数及增殖细胞分数为鼻咽癌治疗的预后指标,因此,连同临床。