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。     

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。     

The Association of Molecular Biomarkers in the Diagnosis of Cervical Pre-Cancer and Cancer and Risk Factors in Senegalese

Background: Cervical intraepithelial neoplasia (CIN) grading is subjective and affected by substantial rates of discordance among pathologists. Although recent studies have suggested that p16INK4a may be a useful surrogate biomarker of cervical neoplasia, Ki-67 and human papillomavirus testing have also been shown to be useful in detecting neoplasia. The purpose of this study was to determine the expression of p16INK4a and Ki-67 in cervical neoplasia and its correlations with cofactors. Methods: The study involved 69 patients with and without cervical neoplasia who underwent colposcopic directed biopsy. On each patient, two samples were taken; the first was used for immunohistochemistry and the second for molecular testing, using HPV16and18 genotyping Real-Time PCR Kit. Results: The study revealed the expression level of p16INK4a and Ki-67 in a descending order, from invasive squamous cell carcinoma (SCC), CIN2/3, CIN1 and non-dysplastic lesions. Correlations showed an association between the staining of p16NK4a and Ki-67 with the increase of age (OR: 1.79 (95%IC: 0.49 – 6.55), p = 0.037) and marital status (OR: 0.17 (95%IC: 0.04 – 0.68), p = 0.003). We found that the expressions of p16INK4a and Ki-67 were significantly different between invasive SCC vs non-dysplasia (OR: 44.57 (95%IC: 4.91 – 403.91), p <0.0001). The study showed significant correlation between HPV 16and18 infection with p16 INK4a and Ki-67 expression (OR: 0.13 (95%IC: 0.03 – 0.52), p <0.0001). Strong expression of p16INK4a and Ki-67 were observed in invasive squamous cell carcinoma, moderate staining was found in CIN2/3, weak staining in CIN1 and normal histology. Conclusion: Our findings indicate that p16INK4a and Ki-67 expressions associated strongly with cervical pathology. Therefore, p16/Ki-67 could be considered as a suitable biomarker for cervical cancer screening, particularly in HPV-based screening programs.     

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。     

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.     

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。     

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.     

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。     

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...     

Combined p16INK4a and human papillomavirus testing improves the prediction of cervical intraepithelial neoplasia (CIN II-III) in Thai patients with low-grade cytological abnormalities

Thailand is in the process of developing a national cervical screening program. This study examined p16INK4a staining and HPV prevalence in abnormal cervical samples with atypical squamous cells of undetermined significance (ASCUS) and low-grade squamous intraepithelial lesion (LSIL), to evaluate the efficacy of combined HPV and p16INK4a detection to predict CIN II-III. Totals of 125 ASCUS and 87 LSIL cases were re-evaluated by Pap test and cervical cells of ASCUS and LSIL cases were prepared on slides for p16INK4a detection by immunocytochemistry. HPV genotyping of DNA extracts was performed by GP5+/6+ PCR and reverse line blot hybridization. Histopathologic tests were performed to identify cervical lesion. Total of 212 cases were diagnosed to normal (20), ASCUS (112), LSIL (78) and HSIL (2). HPV was detected in ASCUS (49/112, 43.8%), LSIL (60/78, 76.9%) and HSIL (2/2, 100%) cases. The majority of HPV positive samples typed for high-risk HPV. 55.7% (107/192) of abnormal cases (ASCUS, LSIL and HSIL) were positive p16INK4a. For the 111 HPV DNA positive cases, 34 of 49 (69.4%) ASCUS cases and 49 of 60 (81.7%) LSIL cases were p16INK4a positive. 140 biopsies were taken and histological classified: CIN negative (65 cases), CIN I (56 cases) and CIN II-III (19 cases). HPV DNA detection predicted CIN II-III with sensitivity and specificity of 84% and 49%, whereas p16INK4a staining showed higher sensitivity (89.5%) and specificity (56.2%). The prediction of CIN II-III was significantly better by combination of positive HPV DNA and p16INK4a with 93.8% sensitivity and 59.2% specificity. Detection of HPV DNA combined with p16INK4a in cervical cells can predict CIN II-III and may improve the screening diagnosis of Thai women at risk for CIN II-III or cancer.     

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.     

Immunohistochemical evaluation of heat shock proteins in normal and preinvasive lesions of the cervix

Heat Shock Proteins (HSPs) are molecular chaperons with multiple functions relating to cellular homeostasis. Primary, HSPs are expressed in response to cellular stresses that may also include carcinogenesis. Patterns of expression have not been extensively evaluated in the multi-step carcinogenesis of cervical cancer (Normal --> HPV infection --> Cervical Precancer --> Cancer). We evaluated the expression of HSP40, HSP60, HSP70, and HSP90 in normal tissues (N=30), in cervical intraepithelial neoplasia grade 1 (CIN1)(synonymous with productive HPV infections) (N=32), and in CIN3 (cervical precancer)(N=25) by immunohistochemistry staining (graded 0-3) and compared the results to p16INK4a, a biomarker of oncogenic HPV infections and CIN3. We found strong patterns of increased HSP40, HSP60, and HSP70 immunostaining with increasing severity of the lesion in a manner similar to p16INK4a (P(Trend)<0.0005). No difference in staining intensity by grade of lesion was observed for HSP90 (P(Trend)=0.8). Tissue patterns in CIN3 of diffuse immunostaining for HSP40 and HSP70 were analogous to those observed for p16INK4a; HSP60 immunostaining appeared more punctate within cells than for other antigens although similar tissue patterns were observed. We conclude that HSP40, HSP60, and HSP70 expressions are up-regulated in response to the development of CIN3 akin to p16INK4a expression.     

p16INK4a免疫细胞化学检测在筛查宫颈癌中的作用

目的 探讨p16^INK4a免疫细胞化学检测在筛查宫颈癌及其癌前病变中的作用。方法 选择220例宫颈液基细胞学剩余标本,制作液基薄片进行p16^INK4a 免疫细胞化学检测,随访组织活检结果,并与高危人乳头瘤病毒（HR—HPV）DNA检测结果进行对照。结果 p16^INK4a在宫颈细胞学诊断的鳞状细胞癌（SCC）、鳞状上皮内高度病变（HSIL）、鳞状上皮内低度病变（LSIL）、非典型鳞状细胞-小除外上皮内高度病变（ASC—H）和非典型鳞状细胞-不能明确意义（ASC—US）病例的阳性表达率分别为100．0％（7／7）、92．2％（107／116）、24．3％（17／70）、100．0％（14／14）和36．4％（4／11）。150例p16^INK4a阳性者中,111例有组织活检诊断,其中宫颈上皮内瘤变（CIN）2级及以上病变者97例（87．4％）;70例p16^INK4a阴性者中,18例有组织活检诊断,无一例CIN2及以上病变。p16^INK4a在CIN2及以上病变与在CIN1之间的阳性表达率差异有统计学意义（P〈0.01）,而HR-HPV DNA的阳性率在两者之间差异无统计学意义。结论 p16^INK4a在宫颈HSIL及以上病变中高表达,有利于高危病例的筛选。     

P16/Ki-67双染联合DNA倍体分析在ASCUS分流诊断中的应用价值

目的： 探讨P16/Ki-67双染联合DNA倍体分析在宫颈意义不明的不典型鳞状细胞（ASCUS）分流诊断中的应用价值。方法： 选取2016年12月-2018年8月上海市长宁区妇幼保健院收治的经液基细胞学（LCT）诊断为ASCUS的患者115例，同时行P16/Ki-67双染检测，DNA倍体分析，且以阴道镜病理活检结果为金标准。结果： 115例患者阴道镜病理活检结果提示，宫颈上皮瘤变2级及以上（CIN2+）45例，其中CIN2级20例，CIN3级23例，鳞癌2例；P16/Ki-67双染检测CIN2+的灵敏性、特异性、诊断符合率分别为77.8%、77.1%、77.4%；DNA倍体分析检测CIN2+的灵敏性、特异性、诊断符合率分别为71.1%、34.3%、48.7%，且DNA倍体阴性的细胞标本中P16/Ki-67双染检测结果均为阴性；DNA倍体分析联合P16/Ki-67双染检测CIN2+的灵敏性、特异性、诊断符合率分别为92.9%、71.4%、86.3%，其中诊断符合率明显高于单纯采用DNA倍体分析（P < 0.05）。结论： P16/Ki-67双染相较于DNA倍体分析检测CIN2+具有更高灵敏度和特异度，两者联合检测能有效提高准确率，可辅助用于ASCUS的分流诊断。     

P16/Ki-67双染联合DNA倍体分析在ASCUS分流诊断中的应用价值

目的： 探讨P16/Ki-67双染联合DNA倍体分析在宫颈意义不明的不典型鳞状细胞（ASCUS）分流诊断中的应用价值。方法： 选取2016年12月-2018年8月上海市长宁区妇幼保健院收治的经液基细胞学（LCT）诊断为ASCUS的患者115例，同时行P16/Ki-67双染检测，DNA倍体分析，且以阴道镜病理活检结果为金标准。结果： 115例患者阴道镜病理活检结果提示，宫颈上皮瘤变2级及以上（CIN2+）45例，其中CIN2级20例，CIN3级23例，鳞癌2例；P16/Ki-67双染检测CIN2+的灵敏性、特异性、诊断符合率分别为77.8%、77.1%、77.4%；DNA倍体分析检测CIN2+的灵敏性、特异性、诊断符合率分别为71.1%、34.3%、48.7%，且DNA倍体阴性的细胞标本中P16/Ki-67双染检测结果均为阴性；DNA倍体分析联合P16/Ki-67双染检测CIN2+的灵敏性、特异性、诊断符合率分别为92.9%、71.4%、86.3%，其中诊断符合率明显高于单纯采用DNA倍体分析（P < 0.05）。结论： P16/Ki-67双染相较于DNA倍体分析检测CIN2+具有更高灵敏度和特异度，两者联合检测能有效提高准确率，可辅助用于ASCUS的分流诊断。     

Geminin、Ki-67和HPV检测对早期宫颈上皮内瘤变的诊断价值

目的:探讨Geminin、Ki-67和HPV检测对早期宫颈上皮内瘤变的诊断价值。方法:采用免疫组化SP法检测Geminin、Ki-67在126例宫颈上皮内瘤变(CIN)组织、50例慢性宫颈炎宫颈组织及30例正常宫颈组织中的表达；采用HC2的方法检测HPV的载量。用Spearman秩相关分析Geminin、Ki-67分别与HPV感染的相关性。结果:Geminin、Ki-67在CIN组织中阳性表达率高于宫颈炎组和对照组(P＜0.05)；Geminin、Ki-67在宫颈炎组和对照组中阳性表达率差异无统计学意义(P＞0.05)；Geminin、Ki-67在CIN组织中阳性表达率CINIII组＞CINII组＞CINI组，组间比较差异有统计学意义(P＜0.05)；HPV在宫颈病变组织中阳性表达率CINIII组＞CINII组＞CINI组＞宫颈炎组＞对照组，组间比较差异有统计学意义(P＜0.05)；Geminin、Ki-67表达分别与HPV感染呈正相关(P＜0.05)；Geminin、Ki-67和HPV联合检测的特异度和精确度最高。 结论:不同CIN分期病变组织Geminin、Ki-67表达水平和HPV感染率差异较大，可通过HPV、Geminin、Ki-67联合检测对早期CIN进行辅助诊断。     

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.