Probes for P16

We herein report the treatment outcome of oropharyngeal squamous cell carcinoma (OPSCC) at Kyushu University Hospital, the total number of OPSCC cases, and changes in the proportion of human papilloma virus (HPV)-related carcinomas over time.We performed a retrospective analysis of 237 cases treated for OPSCC at Kyushu University Hospital between 2013 and 2019. We performed HPV-mRNA in situ hybridization and p16 immunohistochemistry.This study included 197 males (82.1%) and 40 females (17.9%). The disease-specific, progression-free and overall survival (OS) were 69%, 62% and 61%, respectively, over the decade-long study period. p16-Immunohistochemistory and highrisk HPV mRNA in situ hybridization were positive in 114 (48.1%) and 105 (44.3%) cases, respectively. The number of HPV-related OPSCC cases increased according to an annual analysis. HPV+ cases had a significantly better prognosis than HPV- cases. In addition, p16+/HPV- cases had a significantly worse prognosis than p16+/HPV+ cases (OS: p = 0.0484). HPV+ OPSCC cases were associated with a younger age (< 60 years old) (p = 0.0429), non-smoker (p = 0.0001), lateral tumor site (< 0.00001), lymphoid metastasis (< 0.0001) and low clinical stage (< 0.0001).The frequency of HPV-related OPSCC cases is increasing in Japan as well as worldwide, and such cases are characterized by no smoking habit, a young age, and a good prognosis. Even in p16+ OPSCC, HPV- cases had a poor prognosis, suggesting the importance of accurate HPV determination. To determine the intensity of treatment for HPV-related and non-related OPSCC, it is necessary to accumulate cases for the accurate HPV determination and comparison of treatment effects.

Recursive partitioning analysis (RPA) from the Radiation Therapy Oncology Group (RTOG)-0129 has identified a low-risk group of patients with oropharynx cancer (OPC) who might benefit from therapeutic de-intensification. These risk groups have not yet been reproduced in an independent cohort treated heterogeneously. Therefore, the objective of this analysis was to validate the RPA risk groups and examine the prognostic impact of novel factors.Patients with OPC were enrolled in a prospective study at 3 academic medical centers from 2013 to 2018. Medical record abstraction was used to ascertain clinical variables including staging and survival according to the 7th edition of the American Joint Committee on Cancer (AJCC) Cancer Staging Manual. Human papillomavirus-positive tumor status was determined by p16 immunohistochemistry and/or HPV RNA in situ hybridization. Kaplan-Meier and log-rank methods were used to compare survival. Cox proportional hazards were used to generate univariate and multivariable hazard ratios (HRs).Median follow-up time was 3.2 years. The low-, intermediate-, and high-risk groups had significant differences in 2-year overall survival (OS, 99.1%; 95% CI, 94.4%-99.9% vs OS, 93.0%; 95% CI, 74.7%-98.2% vs OS, 80.0%; 95% CI, 40.9%-94.6%; Poverall = .0001) and 2-year progression-free survival (PFS, 97.5%; 95% CI, 92.4%-99.2% vs PFS, 89.3%; 95% CI, 70.3%-96.4% vs PFS, 80.0%; 95% CI, 40.9%-94.6%; Poverall < .002). After adjustment for age, sex, and level of educational attainment, OS and PFS were significantly lower for the intermediate- (OS adjusted hazard ratio [aHR], 5.0; 95% CI, 1.0-23.0; PFS aHR, 3.4; 95% CI, 1.0-11.5), and high- (OS aHR, 7.3; 95% CI, 1.4-39; PFS aHR, 5.0; 95% CI, 1.2-21.6) risk groups compared with the low-risk group. Lower education was also independently significantly associated with worse OS (aHR, 8.9; 95% CI, 1.8-44.3) and PFS (aHR, 3.1; 95% CI, 1.0-9.6).In patients with OPC, the RTOG-0129 RPA model is associated with OS and PFS in a heterogeneously treated cohort.

ObjectiveDetermine the presence and prognostic value of human papillomavirus (HPV), Epstein-Barr virus (EBV), Merkel cell polyomavirus (MCPyV), and cell cycle proteins in head and neck squamous cell carcinoma (HNSCC) of non-smokers and non-drinkers (NSND).MethodsClinical characteristics and tumors of 119 NSND with HNSCC were retrospectively collected and analyzed on tissue microarrays. RNAscope in situ hybridization (ISH) was used to screen for the presence of HPV and MCPyV mRNA. Immunohistochemistry was performed for expression of p16 as surrogate marker for HPV, Large T-antigen for MCPyV, and cell cycle proteins p53 and pRb. Positive virus results were confirmed with polymerase chain reaction. For EBV, EBV encoded RNA ISH was performed. Differences in 5-year survival between virus positive and negative tumors were determined by log rank analysis.ResultsAll oropharyngeal tumors (OPSCC) (n = 10) were HPV-positive, in addition to one oral (OSCC) and one nasopharyngeal tumor (NPSCC). The other three NPSCC were EBV-positive. MCPyV was not detected. Patients with HPV or EBV positive tumors did not have a significantly better 5-year disease free or overall survival. Over 70% of virus negative OSCC showed mutant-type p53 expression.ConclusionIn this cohort, all OPSCC and NPSCC showed HPV or EBV presence. Besides one OSCC, all other oral (n = 94), hypopharyngeal (n = 1), and laryngeal (n = 9) tumors were HPV, EBV, and MCPyV negative. This argues against a central role of these viruses in the ethiopathogenesis of tumors outside the oro- and nasopharynx in NSND. So, for the majority of NSND with virus negative OSCC, more research is needed to understand the carcinogenic mechanisms in order to consider targeted therapeutic options.

目的探讨喉鳞状细胞癌(LSCC)中人乳头瘤病毒(HPV)及细胞周期相关蛋白p16的表达及意义。方法收集北京同仁医院2005-01-01-2011-12-31 LSCC病例资料332例,回顾性分析其临床病理学特点,采用聚合酶链反向点杂交(PCR-RDB)方法检测HPV16 DNA,构建组织芯片并采用免疫组织化学法染色观察细胞周期相关蛋白p16的表达,比较HPV阳性组和HPV阴性组临床病理学特点的差异,分析高危型HPV16与p16的关系;采用RNAscope方法检测HPV16 E6/E7 mRNA的表达,观察在LSCC中是否具有转录活性的HPV,从而明确LSCC是否与HPV有关联。结果在332例LSCC中有45例(45/332, 13.6%)检测到高危型HPV,其中40例(40/332, 12.0%)检测到HPV16,HPV 16阳性与淋巴结内肿瘤囊性转移有关联,χ~2=9.774,P=0.004;T_1患者HPV16阳性率高于T_4患者,P=0.011;组织学分级也对患者是否表达HPV16 DNA有一定的影响,P=0.049。与LSCC患者年龄、性别、是否吸烟/饮酒、TNM分期及肿瘤大小等均无统计学意义的关联,均P0.05。在332例LSCC中36例(36/332,10.84%)p16阳性表达,其中女性阳性率高于男性,差异有统计学意义的关联,χ~2=4.841,P=0.04;但与年龄、是否吸烟/饮酒、TNM分期、肿瘤部位、组织学类型、组织学分级及淋巴结转移无统计学意义的关联,均P0.05。HPV16表达与p16表达有统计学意义的关联,χ~2=3.944,P=0.047。但是p16与HPV16的表达并不完全一致,其敏感性仅为20%(8/40)。332例LSCC均检测了HPV 16 E6/E7 mRNA的表达,染色结果均为阴性。结论部分LSCC中伴有HPV16的感染,但HPV16并不是一个主要的致癌因素,且LSCC中p16表达并不是HPV16感染的替代性指标。