Prevalence of EBV genotypes in Polish, Taiwanese and Arabic healthy students and association between genotypes and 30-bp deletion in the LMP-1 gene phylogenetic analysis.

The aim of this study was to compare the prevalence of EBV genotype and del-LMP-1 in saliva from Polish, Taiwanese and Arabic healthy students. The study group consisted of 56 healthy students; 24 of them Polish, 25 Taiwanese, and 7 Arabic. Typing was carried out using PCR with EBNA-2 primers. A detection of LMP-1 variants was also performed using PCR. EBV DNA was detected in 22 investigated samples (39.3%). Type 1 of the virus was dominant in both Polish and Taiwanese group. Among 62.5% Taiwanese with EBV 1 and 55.6% Polish detected EBV with 30-bp deletion in LMP-1 gene.

Do polyomavirus hominis strains BK and JC play a role in oral squamous cell carcinoma?

INTRODUCTION: Head and neck cancers are the most common cancers worldwide. It is estimated that approximately 90% of all head and neck cancers are represented by squamous cell carcinoma (SCC). There are many risk factors causing this type of cancer, including environmental factors and lifestyle choices, such as tobacco smoking or abusing alcohol. Other important risk factor include infectious factors. OBJECTIVE: The aim of this study was to analyze the prevalence of BK and JC virus infections among patients with oral squamous cell carcinoma (OSCC). MATERIALS AND METHOD: The correlation between BKV infection and OSCC, and correlation between BKV, OSCC, alcohol abuse, tobacco smoking, demographic data, pre-treatment staging, metastases of lymph node evidence, and grading, was analyzed. The study group consisted of 92 patients with squamous cell carcinoma (OSCC), 75 males, and 17 females, aged between 40 - 87 (average 56.8). All the patients underwent surgery and were not subjected to chemotherapy or radiotherapy prior to treatment. The analyzed samples were collected from paraffin sections. RESULTS: BKV DNA was detected in 18.5% of patients with OSCC. In the control group, BKV DNA was detected in 3.3%. BKV DNA was statistically more frequently detected among patients with squamous carcinoma, compared to the control group (p<0.05). CONCLUSIONS: The obtained results suggest that the BKV virus may play an important role in the development of oral squamous cell carcinoma.

Short-fragment PCR assay for highly sensitive broad-spectrum detection of human papillomaviruses in laryngeal squamous cell carcinoma and normal mucosa: clinico-pathological evaluation.

The aim of the study was to determine the prevalence and genotypes of HPV infection in laryngeal cancer specimens, normal mucosa obtained from the surgical margin and laryngeal nodules using a novel high sensitive and specific SPF(10) HPV DNA test, PCR/DEIA method and INNO-LiPA genotyping assay. The correlation between HPV presence and clinico-pathological features was analyzed. Tissue samples were collected from 93 primary laryngeal squamous cell carcinoma (LSCC), 49 specimens of normal mucosa and from 22 specimens of laryngeal nodules serving as control group. HPV DNA was amplified by the short PCR fragment (SPF(10)) primer set using HPV DNA enzyme immunoassay (DNA/DEIA) method and INNO-LiPA HPV genotyping assay. Human papillomavirus was detected in 33 (35.5%) of the 93 samples from LSCC, in 4 (8.2%) of 49 samples of the normal mucosa and it was not detected in any of the sample from the control group. Twenty-eight of 33 (81.8%) were positive for HPV-16, 6 of 33 (18.2%) were positive for HPV-18 and 5 of 33 (15.1%) were positive for HPV-33. Multiple infection was found in 5 of 33 (15.1%); 3 samples were positive for HPV-16 and HPV-33, 2 samples for HPV-16 and HPV-18. There was a statistically significant correlation between the presence of HPV in LSCC tumors and in control group samples and between the presence of HPV in the tumors and normal mucosa from the free surgical margin. The presence of HPV infection in 35.5% of the cases suggests a possible role in the etiology of laryngeal cancer and supports the role of high-risk types of HPV (16, 18 and 33) in LSCC. HPV infection is not likely to influence survival rates as an independent prognostic factor in patients with laryngeal cancer.