Predictive Value of Marker of Proliferation Ki-67 and Cell Cycle Dependent Protein kinase Inhibitor P16INK4a in Cervical Biopsy to Determine Its Biological Behaviour

Objective: The aim of the study is to analyse the Immuno-histochemical expression of   Ki-67  and P16INK4a in CIN and cervical cancer cases  and  their utility to determine the accuracy of histological diagnosis and prediction of biological behavior of cervical lesion. Methodology: A retrospective cross-sectional study was carried in 110 numbers of cervical biopsy that included 25 CIN1, 21 CIN2, 12 CIN3, 26 SCC and 01 adenocarcinoma and 25 non neoplastic lesion. The tissue sections were stained with Ki-67 and P16INK4a. Results: Ki-67 expression was seen in 55.5% (61/110) cases of cervical lesion., out of which 3.6% (4/110; cervicitis -2/110 and metaplasia-2/110) cases were non dysplaia, 51.8% (57/110) cases were dysplasia /CIN of varying grade including invasive cancer. P16INK4a expression was noted 51.8% (57/110). There was an increasing trend of the intensity of Ki-67 and P16INK4a from focal positivity in low grade lesion to diffuse intensity in higher grade lesion and is statistically significant. There was strong association between the two variables Ki-67 and P16INK4a positive cases with their histologic grade. Conclusion: Though histopathology remains the ‘‘gold standard’’ for the diagnosis of CIN, both low and high-grade, biomarkers like Ki-67 and P16INK4a have emerged as helpful adjuncts. Their combined use may assist in the histopathologic classification of preinvasive lesions and facilitate the distinction from nondysplasia.     

Evaluation of cervical cone biopsies for coexpression of p16INK4a and Ki-67 in epithelial cells

Diffuse overexpression of p16(INK4a) in basal and parabasal cells of cervical epithelium is a hallmark of human papillomavirus-mediated transformation. Focal p16(INK4a) expression is occasionally observed in nondysplastic epithelium. In normal cells, expression of p16(INK4a) triggers cell cycle arrest. However, cells undergoing transformation in intraepithelial lesions actively proliferate. To prove that the different expression patterns of p16(INK4a) , i.e., focal versus diffuse, reflect biologically different entities, we hypothesized that p16(INK4a) -positive cells in epithelia displaying focal p16(INK4a) expression pattern do not coexpress proliferation-associated Ki-67 protein, while p16(INK4a) -positive cells in lesions with diffuse p16(INK4a) expression may do. A total of 138 cervical cone biopsies were stained for the expression of p16(INK4a) and Ki-67 using a primary antibody cocktail. All metaplastic lesions (n = 21) displayed focal staining for p16(INK4a) , and in all of these lesions p16(INK4a) -positive cells were found to be negative for Ki-67 expression. Diffuse expression of p16(INK4a) was observed in 12/21 (57.1%) cervical intraepithelial neoplasia (CIN) 1 lesions, all of them simultaneously showed Ki-67 immunoreactivity in a large proportion of p16(INK4a) -positive cells. Seventeen of 23 (73.9%) CIN2 lesions and all 27 (100%) CIN3/carcinoma in situ (CIS) as well as all 46 (100%) carcinoma cases displayed diffuse and combined expression of p16(INK4a) and Ki-67. Coexpression of Ki-67 and p16(INK4a) in the same cell is entirely restricted to cervical lesions displaying diffuse p16(INK4a) expression, whereas in lesions with focal p16(INK4a) expression, p16(INK4a) -expressing cells are negative for Ki-67. Thus, diffuse expression of p16(INK4a) reflects lesions with proliferation-competent cells, while p16(INK4a) -expressing cells associated with focal expression patterns are cell cycle arrested.     

P16INK4a和Ki-67在宫颈癌前病变诊断中的意义

目的研究P16INK4a、Ki-67在宫颈癌前病变中的表达及早期诊断价值。方法宫颈活检标本92例,采用免疫组织化学PV-9000二步法检测宫颈鳞癌28例,CIN 45例（CINⅢ级17例、CINⅡ级7例、CINⅠ级21例）,炎性病变19例。结果在宫颈癌、CIN病变、宫颈炎P16INK4a的阳性表达率分别为100%、44.4%和10.5%,Ki-67的阳性表达率分别为100%、51.11%、21.05%,三组不同病变比较均差异有显著性（P〈0.001）。P16INK4a与Ki-67表达存在正相关（r2=0.893,P〈0.001）。结论 P16INk4a、Ki-67联合检测可以提高宫颈癌的早期诊断率。     

宫颈上皮内瘤变p16~(INK4a)和p53及Ki-67表达及其诊断价值探讨

目的:探讨用p16和p53及Ki-67等免疫组化标记作为宫颈上皮内瘤变(CIN)诊断的辅助指标。方法:选取我院档案CIN患者133例,年龄20～86岁,中位年龄46岁。经3位高年资病理医师复查确认,其中CIN 1级31例、CIN 2级37例和CIN 3级65例。另选同期我院宫颈慢性炎患者19例,浸润性鳞状细胞癌患者20例作为对照。采用SP法进行p16、p53和Ki-67免疫组化染色,结果独立评分。各级别CIN与免疫组化表达的关系采用单变量χ2检验和Spearman等级相关分析。结果:p16阳性表达位于细胞核或胞核伴胞质,p53和Ki-67定位于细胞核。p16、p53和Ki-67表达阳性率随着CIN的加重而升高,均与CIN级别呈正相关,r值分别为0.789、0.554和0.749,P<0.001。153例CIN 1+标本中p16、p53和Ki-67与组织学诊断符合率分别为96.7%(148/153)、71.9%(110/153)和88.2%(135/153)。在102例CIN 2+标本中,p16、p53和Ki-67免疫组化染色的敏感性分别为97.1%(99/102)、74.5%(76/102)和97.1%(99...     

The role of cyclins and cyclins inhibitors in the multistep process of HPV-associated cervical carcinoma

BACKGROUND: Human papillomavirus (HPV) types 16 and 18 are associated with cervical carcinogenesis. This is possibly achieved through an interaction between HPV oncogenic proteins and some cell cycle regulatory genes. However, the exact pathogenetic mechanisms are not well defined yet. METHODS: We investigated 110 subjects (43 invasive squamous cell carcinoma (ISCC), 38 CIN III, 11 CIN II, 18 CIN I) confirmed to be positive for HPV16 and/or 18 as well as 20 normal cervical tissue (NCT) samples for abnormal expression of cyclin D1, cyclin E, CDK4, cyclin inhibitors (p21 (waf), p27, p16 (INK4A)) and Ki-67 using immunohistochemistry and differential PCR techniques. RESULTS: There was a significant increase in the expression of Ki-67, cyclin E, CDK4, p16 (INK4A) (p=0.003, 0.001, 0.001) and a significant decrease in p27 (Kip1) from NCT to ISCC (p=0.003). There was a significant correlation between altered expression of p27 (KIP1) and p16(INK4A) (p<0.001), cyclin D1 and CDK4 (p=0.001), cyclin E and p27 (Kip1) (p=0.011) in all studied groups. In ISCC, there was significant relationship between standard clinicopathological prognostic factors and high Ki-67 index , increased cyclin D1 and cyclin E, reduced p27 (Kip1) and p21 (waf). CONCLUSION: 1) Aberrations involving p27 (KIP1), cyclin E, CDK4 and p16 (INK4A) are considered early events in HPV 16 and 18-associated cervical carcinogenesis (CINI & II), whereas cyclin D1 aberrations are late events (CINIII & ISCC) 2) Immunohistochemical tests for p16 (INK4A) and cyclin E could help in early diagnosis of cervical carcinoma 3) Only FIGO stage, cyclin D1, p27 (Kip1) and Ki-67 are independent prognostic factors that might help in predicting outcome of cervical cancer patients.     

Predictive significance of the alterations of p16INK4A, p14ARF, p53, and proliferating cell nuclear antigen expression in the progression of cervical cancer.

PURPOSE: The purpose of this research was to evaluate the clinical significance of p16INK4A, p14ARF, p53, and proliferating cell nuclear antigen (PCNA) expression in tumor progression of cervical cancer. DESIGN: Seventeen patients (40 samples) with consecutive cervical lesions from normal squamous epithelium, inflammation of the cervix to cervical intraepithelial neoplasm (CIN) and invasive cervical squamous cell cancer (SCC), or from CIN to SCC were collected for this study. Expression of p16INK4A, p14ARF, p53, and PCNA were detected by immunohistochemistry on paraffin-embedded sections. Human papillomavirus DNA was detected simultaneously with PCR and typed according to its DNA sequence. RESULTS: p16INK4A overexpression was significantly higher in CIN (75%) and in SCC (75%) than in normal or inflammation of the cervix (12.5%; P < 0.01, P < 0.05, respectively). The positive rate of p14ARF expression was higher in SCC (83%) than in normal/inflammation of the cervix (25%; P < 0.05). PCNA expression was negative in normal or inflammation of the cervix, but an increased in expression was seen in 63.2% in CIN and 100% in SCC (P < 0.01, P < 0.05). When the time interval for disease progression from initial biopsy to CIN 3 or invasive cancer was compared with states of p16INK4A expression, cases stained positive for p16INK4A progressed within 64.2 months as compared with 122.3 months among those stained negatively (P < 0.01). Cases with increased p14ARF expression also had a short time interval for disease progression of 78.8 months as compared with 108.3 months in cases that were p14ARF negative. Cases with stable or decreased p53 expression had the shortest time interval for progression of 32.3 months in contrast to cases with no p53 expression (113.9 months). However, cases with increasing p53 expression progressed within 60.8 months. CONCLUSIONS: Our results suggested that altered states of p16INK4A, p14ARF, p53, and PCNA may be valuable markers to predict the progression of cervical neoplasia.     

Expression of the p16INK4a and Ki-67 in relation to the grade of cervical intraepithelial neoplasia and high-risk human papillomavirus infection

Objective

The purposes of this study were to evaluate the expression of p16^INK4a (referred as to p16) and Ki-67 in cervical intraepithelial neoplasia (CIN), and the correlation between high-risk human papillomavirus (HPV) infection and the above biomarkers.

Methods

We analyzed 31 patients who were diagnosed with CIN at Kwandong University Myongji Hospital from October 2006 to September 2007. CIN specimens (CIN1, 12; CIN2, 6; CIN3, 13) were obtained by colposcopy-directed biopsy (CDB) or loop electrical excision procedure (LEEP). The expressions of p16 and Ki-67 were evaluated by immunohistochemical methods with antibodies to p16 and Ki67. The immunohistochemical staining results were classified into four grades: 0, 1, 2 and 3. HPV genotyping or Hybrid Capture-II test was used to detect high-risk HPV.

Results

The expression of p16 (p<0.001) and Ki-67 (p=0.003) were positively associated with CIN grade. p16 expressions increased significantly with high-risk HPV infection (p=0.014), especially HPV type 16 and 58. Ki-67 expression was not related with high-risk HPV. There was positive correlation between the expression of the p16 and Ki-67 (p=0.007).

Conclusion

CIN grade were positively related to the expression of p16 and Ki-67. p16 expressions of high-risk HPV specimens significantly increased more than Ki-67. Therefore, in the diagnosis of CIN and high-risk HPV infection, p16 can be a useful biomarker.     

宫颈上皮内瘤变p16（INK4a）和p53及Ki-67表达及其诊断价值探讨

目的：探讨用p16和p53及Ki-67等免疫组化标记作为宫颈上皮内瘤变（CIN）诊断的辅助指标。方法：选取我院档案CIN患者133例,年龄20～86岁,中位年龄46岁。经3位高年资病理医师复查确认,其中CIN 1级31例、CIN 2级37例和CIN 3级65例。另选同期我院宫颈慢性炎患者19例,浸润性鳞状细胞癌患者20例作为对照。采用SP法进行p16、p53和Ki-67免疫组化染色,结果独立评分。各级别CIN与免疫组化表达的关系采用单变量χ2检验和Spearman等级相关分析。结果：p16阳性表达位于细胞核或胞核伴胞质,p53和Ki-67定位于细胞核。p16、p53和Ki-67表达阳性率随着CIN的加重而升高,均与CIN级别呈正相关,r值分别为0.789、0.554和0.749,P〈0.001。153例CIN 1＋标本中p16、p53和Ki-67与组织学诊断符合率分别为96.7%（148/153）、71.9%（110/153）和88.2%（135/153）。在102例CIN 2＋标本中,p16、p53和Ki-67免疫组化染色的敏感性分别为97.1%（99/102）、74.5%（76/102）和97.1%（99/102）;特异性分别为94.7%（18/19）、84.2%（16/19）和73.7%（14/19）。p16、p53和Ki-67 3者联合在CIN 2＋中的敏感性和特异性分别为98.0%（100/102）、68.4%（13/19）。结论：在宫颈活检的组织学评价时,结合p16、p53和Ki-67免疫组化染色,对提高高级别CIN的检出率、减少漏诊有很大作用。     

P16INK4a及Ki-67免疫细胞化学检测对ASC-US中高级别病变检出的意义

目的：探讨液基细胞学剩余细胞标本P16INK4a、Ki-67免疫细胞化学染色检测宫颈癌前病变的价值。方法：选取2010年1月至2012年6月因宫颈疾病于北京大学第三医院妇产科就诊患者液基细胞学剩余标本50例。所有患者行高危型HPVDNA杂交捕获II代（HCII）检测,P16INK4a、Ki-67免疫细胞化学检测,同时行阴道镜检查及组织病理学活检。结果：以病理诊断将患者分为CIN2以下组和CIN2及以上组。CIN2及以上组P16INK4a及Ki-67表达量高于CIN2以下组,差异均具有统计学意义（P〈0．05）;P16INK4a或Ki-67检测对高级别病变预测的准确性在ASC—US组中优于异常细胞学组;在ASC—US中,P16INK4a或Ki-67检测对高级别病变预测的准确性优于高危型HPV检测。结论：宫颈脱落细胞中P16INK4a或Ki-67免疫细胞化学检测相比于高危型HPV检测可以提高对ASC—US中高级别病变的检出作用。     

p16和Ki-67免疫组化检测与宫颈上皮内瘤变(CIN)程度的相关性分析

目的:分析免疫组化检测p16和Ki-67与宫颈上皮内瘤变（CIN）严重程度的关系,以及 p16联合Ki-67在高级别CIN鉴别中的效能。方法:采用回顾性研究,纳入2016年1月至2018年3月期间粤北人民医院经HE染色病理确诊的宫颈病变患者160例,其中慢性宫颈炎者共38例归为对照组,CINⅠ级、Ⅱ级、Ⅲ级分别为41例、46例、35例;再将CIN患者分为低级别鳞状上皮内病变（LSIL）和高级别鳞状上皮内病变（HSIL）组。对比对照组与CINⅠ级、Ⅱ级、Ⅲ级组、ISIL组、HSIL组p16及Ki-67阳性表达情况;采用Spearman相关性分析观察p16阳性表达、Ki-67阳性表达与CIN严重程度的关系。联合使用p16、Ki-67半定量评分,评估联合p16、Ki-67半定量评分诊断结果与病理结果一致性,评估效能。结果:CINⅠ-Ⅲ级组p16阳性率较对照组高,CINⅡ、Ⅲ级p16阳性率较CINⅠ级高;HSIL组阳性率较LSIL组高,差异均有统计学意义,P＜0.05。Ki-67在对照组中阳性率为0.00%,在LSIL组、HSIL组中分别为68.29%、100.00%。p16与宫颈病变程度呈正相关,r=0.692,P=0.021 0;Ki-67与宫颈病变程度呈正相关,r=0.612,P=0.001 8。p16联合Ki-67诊断炎症结果与病理完全一致,CINⅠ级共36例（87.80%）符合,CINⅡ级共43例（93.48%）符合,CINⅢ级共34例（97.14%）符合;LSIL符合率为87.80%（36/41）,HSIL符合率为95.06%（77/81）。p16联合Ki-67诊断LSIL敏感性、特异性为94.74%和97.58%,诊断HSIL敏感性、特异性分别为96.25%、98.81%,诊断CIN敏感性、特异性分别为92.62%、96.48%,其中LSIL敏感性高于单用,CIN诊断特异性较单用p16高,P＜0.05。结论:p16和Ki-67表达与宫颈上皮内瘤样病变严重程度密切相关,可以通过观察二者表达情况辅助CIN病情严重程度判断,联合p16和Ki-67免疫组化检测能提高诊断高级别鳞状上皮内病变诊断特异性、敏感性。     

p16INK4a and laminin-5gamma2 chain expression during the progression of cervical neoplasia

p16INK4a, laminin-5gamma2 chain, and PCNA were investigated to compare the expression levels in relation to histological diagnosis and time for progression. The material consisted of 37 normal cervical tissues, 35 with different grades of CIN, and 11 invasive cervical cancers. Our results showed a reduction of basement membrane staining for laminin-5gamma2 chain from 78.4% in normal squamous epithelium to 27.8% in CIN3 (p < 0.001). The intracytoplasmic staining for laminin-5gamma2 chain increases with severity of lesion. The same trend was observed with p16INK4a and PCNA expression (p < 0.001). Co-expression of p16INK4a and PCNA was seen in 85.7% of samples. Cases that were laminin-5gamma2 chain BM - /p16INK4a+/PCNA+ have the shortest interval time (average: 46.8+/-36.3 months) for progression, while cases with laminin-5gamma2 chain BM + /p16INK4a-/PCNAPCNA--have the longest time interval (average: 110.2+/-52.7 months) (p < 0.05). Thus co-expression of p16INK4a, laminin-5gamma2 chain and PCNA may be valuable for the prediction progression of cervical neoplasia.     

p16INK4A immunohistochemical staining and predictive value for progression of cervical intraepithelial neoplasia grade 1: A prospective study in China

p16^INK4A is strongly expressed in tissues diagnosed as cervical intraepithelial neoplasia (CIN) and cancer in women infected with human papillomavirus (HPV), but few prospective studies have evaluated p16^INK4A as a marker for the risk of low‐grade CIN (CIN1) progression. We investigated the prevalence of p16^INK4A immunostaining by CIN grade and whether overexpression of p16^INK4A in CIN1 predicts future risk for high‐grade CIN in Chinese women. 6,557 Chinese women aged 30–49 years were screened from 2003 to 2005 using cytology and carcinogenic HPV test. Colposcopy was performed on women with any abnormal result. p16^INK4A Immunostaining was performed on biopsies from all women with CIN1, as well as randomly selected women with normal or CIN grade 2 and worse (CIN2+) biopsies. Women with CIN1 were followed up without treatment. Colposcopy was performed on all untreated women at a 2‐year interval. The prevalence of p16^INK4A staining was 2.7%, 42.7%, 75.5%, 79.6% and 100% among women with normal, CIN1, 2, 3 and cancer biopsies, respectively (p < 0.001). HPV positivity was strongly associated with p16^INK4A staining [odds ratios (OR) = 12.8; 95% confidence intervals (CI): 5.2–31.6]. p16^INK4A staining of CIN1 biopsies at baseline was associated with an increased risk of finding high‐grade CIN over 2 years of follow‐up (OR = 1.43; 95% CI: 0.52–3.91). The two‐year cumulative incidence of CIN2+ for p16^INK4A positive women was higher at 10.71% than for p16^INK4A negative women at 1.30% (crude RR = 8.25, 95% CI: 1.02–66.62). p16^INK4A overexpression is strongly associated with grade of CIN and risk of progression to high‐grade CIN in women with low‐grade lesions.     

细胞周期调控基因与人类乳头状瘤病毒在子宫颈癌中的表达

目的分析细胞周期调控基因p16^INK4A、细胞周期蛋白D1（Cyclin D1）及Ki-67蛋白与人乳头状瘤病毒（HPV）16／18、31／33在子宫颈鳞状细胞癌（ISCC）中的表达,研究其在ISCC发生、发展中的作用和相关性。方法应用组织芯片结合原位杂交法和免疫组织化学法检测66例ISCC、35例子宫颈上皮内瘤变（CIN）、30例正常子宫颈鳞状上皮（NCE）中p16^INK4A、Cyclin D1、Ki-67和HPV16／18、31／33的表达。应用SPSS13．0统计软件分析结果。结果HPV16／18、p16^INK4A、Cyclin D1及Ki-67在ISCC中的表达明显高于CIN和NCE组,差异有统计学意义;p16^INK4A蛋白阳性表达率与组织学分级呈正相关;Ki-67阳性表达率与淋巴结转移和子宫颈管壁浸润深度呈正相关;Cyclin D1蛋白与临床各参数均无相关性（P〉0．05）。结论高危HPV在ISCC的发生、发展中起重要作用,p16^INK4A基因可能不是单纯作为抑癌基因在子宫颈癌中起作用,Ki-67可以作为鉴别良、恶性肿瘤的有价值的临床参考指标。     

高危型HPV负荷量和p16INK4A蛋白监测评估宫颈锥切术治疗CIN

[目的]评价高危型人乳头状瘤病毒HPV负荷量的检测和p16INK4A蛋白的表达在预测宫颈上皮内瘤变(CIN)宫颈锥切术后残存病变或复发中的意义.[方法]回顾性分析142例2008年10月至2010年12月因CIN行宫颈锥形切除术治疗患者的临床资料.所有患者均于宫颈锥形切除术前6个月以内和术后6～12个月进行HPV负荷量检测,并采用免疫组化方法检测HPV DNA阳性患者宫颈细胞中p16INK4A蛋白表达.[结果]宫颈锥切术前,随着CIN级别的上升,HPV负荷量以及p16INK4A蛋白表达均明显增强(P＜0.05).但在宫颈锥切术后,HPV负荷量和p16INK4A蛋白表达明显降低,宫颈锥切术前和术后两者之间差异有统计学意义(P＜0.05).[结论] HPV负荷量持续增高和p16INK4A蛋白持续呈强阳性是宫颈锥切术后发生残存病变或复发的高危因素,在监测HPV负荷量的同时检测p16INK4A蛋白的表达,对判断宫颈锥切术后发生残存病变或复发有重要意义.     

Expression of the cell cycle regulator p27(Kip1) in normal squamous epithelium, cervical intraepithelial neoplasia, and invasive squamous cell carcinoma of the uterine cervix. Immunohistochemistry and functional aspects of p27(Kip1).

BACKGROUND: Abnormality of cell cycle regulators and tumor suppressors, such as cyclin dependent kinase inhibitors (cdkIs), has been reported in malignant tumors. The current study was undertaken to examine the involvement of a cdkI, p27(Kip1) (p27), in the neoplastic process of the uterine cervical epithelium. METHODS: Immunohistochemical staining of p27 was performed in samples of normal cervical tissue (30 samples), cervical intraepithelial neoplasias (CINs; 17 samples), and invasive squamous cell carcinoma (SCC; 25 samples). The results were compared with the expression levels of Ki-67, cdk2, and cyclin E. The functional aspects of the p27 protein, such as its ability to bind to cdk2 and the phosphorylation activity of p27-bound cdk2, also were evaluated with an immunoprecipitation and histone H1 kinase assay. RESULTS: In normal cervical epithelia, the expression of p27 was strong in the intermediate and superficial cells but very weak in the parabasal cells. In CIN samples, the expression of p27 was negligible. The expression of p27 in these tissues showed an inverse topologic correlation to that of Ki-67, cdk2, and cyclin E. However, it is noteworthy that the number of p27 positive cells increased in SCC samples that also showed increased expression of Ki-67, cdk2, and cyclin E. The p27 protein in SCC samples was bound to cdk2 and cyclin E. However, cdk2 that was bound to p27 still possessed histone H1 kinase activity. CONCLUSIONS: The expression of p27 may be involved in the growth regulation of the normal squamous epithelium in the uterine cervix. However, aberrant function of p27 expression may occur in invasive SCC of the cervix.     

ｐ１６和Ｋｉ-６７蛋白在宫颈上皮内瘤变中的临床意义

目的　研究ｐ１６和Ｋｉ-６７蛋白在宫颈组织中的表达,探讨它们在宫颈病变中的诊断价值。方法　应用免疫组化技术ＳＰ法检测正常宫颈或炎性病变组织２０例、ＣＩＮⅠ组织２２例、ＣＩＮⅡ组织２０例、ＣＩＮⅢ组织２０例、宫颈腺体受累及组织２０例（未见原发病灶）、宫颈鳞状细胞癌组织２０例中ｐ１６和Ｋｉ-６７蛋白的表达情况。结果　ｐ１６和Ｋｉ-６７蛋白在正常宫颈组织中的阳性表达率明显低于宫颈癌前病变及宫颈癌组织,差异有显著意义（Ｐ＜０.０１）。Ｋｉ-６７蛋白阳性表达在良性宫颈组织与ＣＩＮⅠ组织相比较,无显著差异（Ｐ＞０.０５）;ｐ１６阳性表达在宫颈基底细胞增生组织与ＣＩＮⅠ组织相比较,有显著差异（Ｐ＜０.０５）,而Ｋｉ-６７蛋白无显著差异（Ｐ＞０.０５）;ｐ１６着色强阳性在ＣＩＮⅠ与ＣＩＮⅡ、ＣＩＮⅢ、宫颈癌比较,有显著差异（Ｐ＜０.０１）。结论　ｐ１６蛋白能很好地鉴别宫颈良性病变、宫颈上皮内瘤变以及宫颈癌;在鉴别宫颈基底细胞增生与ＣＩＮⅠ时,ｐ１６能起辅助诊断作用;应用ｐ１６的着色强弱能够很好地区分ＣＩＮⅠ与ＣＩＮⅡ、ＣＩＮⅢ,有助于ＣＩＮ的判断与分级。Ｋｉ-６７能很好地区分宫颈高度病变与宫颈癌,但不能区分宫颈良性病变与宫颈低度病变,需结合ｐ１６蛋白联合判断。     

Utility of Ki-67 and p53 in Distinguishing Cervical Intraepithelial Neoplasia 3 from Squamous Cell Carcinoma of the Cervix

The differentiation between cervical intraepithelial neoplasia 3 (CIN 3) and early squamous cell carcinoma(SCC) of the cervix may be difficult in certain situations. Identification of invasion beyond the basement membraneis the gold standard for the diagnosis of the latter. The objective of this study was to determine whether the useof Ki-67 and p53 could help in solving the above dilemma. This was a retrospective study on 61 cases of cervicalneoplasms comprising of 25 cases of CIN 3 and 36 SCC. All cases were evaluated by immunohistochemistryusing Ki-67 and p53 monoclonal antibodies. Results showed that the differences of Ki-67 and p53 expressionbetween CIN 3 and SCC were statistically significant. In conclusion, Ki-67 and p53 may serve as helpful adjunctsto routinely-stained histological sections in differentiating between CIN 3 and SCC.     

The study of the combination detection of HPV-DNA and p16INK4a in cervical lesions

The objective of this study is to detect the infection of human papillomavirus (HPV) and the expression of p16(INK4a) in cervical lesions and to investigate the interaction between hrHPV and p16(INK4a) for cervical lesions and its diagnostic efficiency. hrHPV-DNA was detected by the hybrid capture II (HC-II) system. Immunochemical method was used to detect the expression of p16(INK4a), and histopathologic test was performed to identify cervical lesions. χ(2) test and Spearman's rank correlation were used for statistical analysis. Additive effects model was used to analyze the interaction. The diagnostic sensitivity, specificity, positive predictive values, negative predictive values, accuracy, and the area under the receiver operating characteristic curve were calculated with SPSS 13.0. hrHPV and p16(INK4a) positive rate increased (P < 0.05) with histopathologic diagnosis increasing. The positive rates of hrHPV and p16(INK4a) in negative or chronic inflammation were statistically lower than that in cervical intraepithelial neoplasia (CIN)1, CIN2, CIN3, and squamous-cell carcinoma (SCC) (P < 0.05), respectively. There was a positive interaction between hrHPV and p16(INK4a), relative excess risk of interaction (RERI) was 52.49, attributable proportions of interaction (API) were 72.34%, and the synergy index (S) was 3.75. The specificity and AUC of combining hrHPV with p16(INK4a) were statistically higher than hrHPV or p16(INK4a) alone (P < 0.05). hrHPV and p16(INK4a) are useful markers for the early diagnosis of cervical lesions. A positive interaction between hrHPV and p16(INK4a) is seen. The combination of hrHPV and p16(INK4a) has a higher diagnostic accuracy than hrHPV or p16(INK4a) alone in diagnosis of cervical lesions.     

宫颈上皮内瘤样病变发生发展与p16/Ki-67共表达的相关性研究进展

宫颈上皮内瘤样病变（cervical intraepithelial neoplasia,CIN）属于宫颈癌前病变,虽然CIN进展成宫颈癌时间一般较长,但其发病率增多及发病年龄变小,对女性身心健康造成严重影响。随着宫颈癌筛查技术的进步和分子生物学技术的发展,高级别的宫颈癌上皮内瘤样变的早期检查确认并进行阻断已成为筛查的目标。p16被认为是发现最早的抑癌基因,在鉴别低级别与高级别宫颈鳞状上皮内病变中有重要作用。Ki-67为常见肿瘤标志物,在多种肿瘤中表达。p16/Ki-67双染为新型宫颈病变筛查或诊断方法,即同一细胞内检测到p16、Ki-67共表达,则提示细胞周期失调,考虑为宫颈上皮内高级别瘤样病变。国内近年有研究报道p16和Ki-67在CIN中的作用,未见到相关的综述报道。本文对宫颈上皮内瘤样病变与p16/Ki-67共表达的相关性作一综述,为临床宫颈病变鉴别、诊断提供参考。