Objectives: The aim of this study was to determine the prevalence and type of human papillomavirus (HPV) in various oral lesions in comparison to control healthy oral mucosa, and the dynamic of HPV ...infection course (persistence, change of HPV type and clearance).
Material and Methods: The study comprised 426 consented subjects, of which 343 patients with different oral lesions and 83 controls with apparently healthy oral mucosa, referred for oral examination in the period from 2000 to 2015. The diagnoses of oral lesions were established according to clinical criteria and confirmed by histopathology. Oral cytobrush samples were collected from oral lesions and healthy mucosa from different topographic sites and the HPV types were determined by polymerase chain reaction (PCR). The presence of HPV DNA was evaluated by consensus and type-specific (TS) primer-directed PCR. A subset of samples was analysed for the presence of both alpha and beta genus HPV types.
Results: Out of 426 specimens, 144 (41.98%) from oral lesions and 15 (18.07%) controls were positive for HPV DNA; 22.3% of all tested samples contained beta-HPV type and 15.02% alpha-PV type. The highest prevalence of beta-HPV and high risk (HR) HPV (alpha-HPV) types were found in benign and premalignant oral lesions, while HR-HPVs were found in a small number of control samples. In 38 subjects sampling was performed more than twice, in average 2.29 times, with time distance between sampling of 5.8 months. Twenty-six of these 38 patients were continuously HPV negative, five had transient infection, five acquired a new HPV infection, one had persistent HPV infection, and one had initially co-infection with different HPV types followed with new one during which initial oral lesion became malignant. The topographic distribution of the alpha-PV and beta-PV types showed affinity for the anterior part of the oral cavity and particular risk localization.
Conclusion: Positive finding of HPV in all age groups and on healthy oral mucosa, high prevalence of HPV types in oral premalignant and proliferative lesions, affinity for risk localization in the oral cavity, unpredictable dynamic course and change of HPV type indicates the need for regular oral assessment and HPV control in patients with initially positive findings on oral mucosa.
Objectives: The aim of this study was to determine the prevalence and type of human papillomavirus (HPV) in various oral lesions in comparison to control healthy oral mucosa, and the dynamic of HPV infection course (persistence, change of HPV type and clearance).
Material and Methods: The study comprised 426 consented subjects, of which 343 patients with different oral lesions and 83 controls with apparently healthy oral mucosa, referred for oral examination in the period from 2000 to 2015. The diagnoses of oral lesions were established according to clinical criteria and confirmed by histopathology. Oral cytobrush samples were collected from oral lesions and healthy mucosa from different topographic sites and the HPV types were determined by polymerase chain reaction (PCR). The presence of HPV DNA was evaluated by consensus and type-specific (TS) primer-directed PCR. A subset of samples was analysed for the presence of both alpha and beta genus HPV types.
Results: Out of 426 specimens, 144 (41.98%) from oral lesions and 15 (18.07%) controls were positive for HPV DNA; 22.3% of all tested samples contained beta-HPV type and 15.02% alpha-PV type. The highest prevalence of beta-HPV and high risk (HR) HPV (alpha-HPV) types were found in benign and premalignant oral lesions, while HR-HPVs were found in a small number of control samples. In 38 subjects sampling was performed more than twice, in average 2.29 times, with time distance between sampling of 5.8 months. Twenty-six of these 38 patients were continuously HPV negative, five had transient infection, five acquired a new HPV infection, one had persistent HPV infection, and one had initially co-infection with different HPV types followed with new one during which initial oral lesion became malignant. The topographic distribution of the alpha-PV and beta-PV types showed affinity for the anterior part of the oral cavity and particular risk localization.
Conclusion: Positive finding of HPV in all age groups and on healthy oral mucosa, high prevalence of HPV types in oral premalignant and proliferative lesions, affinity for risk localization in the oral cavity, unpredictable dynamic course and change of HPV type indicates the need for regular oral assessment and HPV control in patients with initially positive findings on oral mucosa.
Cilj istraživanja bio je ispitati prevalenciju i tip humanog papiloma virusa (HPV) u različitim oralnim lezijama u usporedbi s kontrolnom, naizgled zdravom sluznicom i dinamiku tijeka HPV infekcije u ustima (ustrajnost, promjenu tipa HPV i prolaznost infekcije).
Ispitanici i postupci: U ispitivanju je sudjelovalo 426 ispitanika, od kojih 343 bolesnika s različitim oralnim lezijama i 83 kontrolnih s naizgled zdravom sluznicom koji su upućeni na pregled usne šupljine u razdoblju od 2000. do 2015. godine. Svi ispitanici dali su svoj informirani pristanak prije uključivanja u ovo istraživanje. Dijagnoze oralnih lezija postavljene su na temelju kliničkih kriterija i potvrđene histopatološkom analizom. Citološki obrisci uzeti su citološkom četkicom s oralnih lezija i zdrave sluznice s topografski različitih mjesta sluznice, a HPV je dokazan lančanom reakcijom polimerazom (PCR). Prisutnost HPV DNA dokazana je PCR-om sa zajedničkim i tip-specifičnim početnicama. Određeni dio uzoraka bio je testiran na tipove HPV-a iz roda alfa i beta.
Rezultati: U svih 426 testiranih uzoraka, HPV DNA dokazana je u 144 (41,98%) uzoraka s oralnih lezija i 15 (18,07%) kontrolnih; 22,3% ispitanih uzoraka sadržavalo je tip HPV iz roda beta, a 15,02% tip HPV iz roda alfa. Najveća prevalencija beta-HPV i visokorizičnih (HR) HPV tipova (alfa-HPV) pronađeni su u benignim i premalignim oralnim lezijama, a visokorizični HPV tipovi pronađeni su i u malom broju kontrolnih uzoraka. U 38 ispitanika uzorkovanje je provedeno više od dva puta, u prosjeku 2.29 puta, u vremenskom razmaku od prosječno 5,8 mjeseci. Dvadesetšest od 38 ispitanika bilo je stalno negativno na HPV, u pet je dokazana prolazna infekcija, pet je steklo novu infekciju HPV-om, jedan ispitanik imao je stalnu infekciju HPV-om, a jedan je tijekom praćenja početno dokazanu koinfekciju s različitim tipovima HPV-a i stekao novu s HPV tipom visokog rizika tijekom koje je inicijalna premaligna lezija sluznice postala zloćudna. Analiza topografske distribucije alfa-HPV i beta-HPV tipova na oralnoj sluznici pokazala je afinitet virusa za sluznicu prednjeg dijela usne šupljine i osobito za rizične lokalizacije.
Zaključak: Pozitivan nalaz HPV-a u svim dobnim skupinama i na zdravoj sluznici te visoka prevalencija HPV tipova u oralnim premalignim i proliferativnim lezijama kao i afinitet za rizične lokalizacije te nepredvidljiv dinamičan tijek uz promjene tipa HPV-a upućuju na potrebu kontrole na HPV u kliničkoj stomatološkoj praksi kod inicijalno pozitivnog nalaza.
Founded in 1996, CommuniTech is Pittsburgh's leading high-tech marketing firm, offering services that range from literature development to complete marketing strategy development. In addition to the ...high-tech industry, CommuniTech also provides its services to the health care, manufacturing, education, hospitality, finance, utilities and consumer products & services markets. CommuniTech is committed to helping clients reach their business goals through solid marketing. The firm is currently based in Bridgeville, PA (Allegheny County, South Fayette Township), approximately 15 miles outside of Pittsburgh.
Biomonitoringom genomske cjelovitosti moguće je poboljšati prevenciju raka. Rak štitne žlijezde postao je jedan od najbrže rastućih tipova raka u svijetu. Usporedbom 100 ispitanika kontrolne skupine ...s ispitanicima s oboljenjima štitne žlijezde uočene su više razine oštećenja molekule DNA u limfocitima periferne krvi (1,24 puta veći broj izmjena sestrinskih kromatida, 1,47 puta veći ukupni broj kromosomskih aberacija, 1,84 veći intenzitet repa, i 2,32 puta veći ukupni broj mikronukleusa). Oksidacijski status ispitanika s oboljenjima štitne žlijezde također je narušen gdje je uočena 1,60 puta veća koncentracija malondialdehida te 32 % niža koncentracija glutationa. Nadalje, B-Raf i Ret proteini izraženi su u 97,89 % citoplazmi tkiva oboljelih ispitanika što sugerira kako bi se citogenetički biomarkeri mogli koristiti u prevenciji raka štitne žlijezde. Pritom bi se oksidacijski stres mogao smatrati jednim od mehanizama nastanka bolesti.
Biomonitoring of genome integrity could be used for better cancer prevention. Thyroid cancer has become one of the fastest growing cancer types in the world. When compared to 100 matched controls, patients with thyroid illnesses showed higher basal DNA damage in peripheral blood lymphocytes (1.24-fold increase in sister chromatid exchanges, 1.47-fold increase in total number of chromosomal aberrations, 1.84-fold increase in tail intensity, and 2.32-fold increase in total number of micronuclei). The oxidative status of thyroid patients was also altered showing 1.60-fold increase in concentration of malondialdehyde and 32 % decrease in concentration of glutathione. Finally, the observed B-Raf and Ret in 97.89 % of patient’s tissue cytoplasms suggest that cytogenetic biomarkers could be used in thyroid cancer prevention. Additionally, oxidative stress might be one of the mechanisms of thyroid disease initiation.
Stik-Rak is a portable tool to help coaches, trainers and parents easily carry sticks and manoeuvre through crowded rinks. Players now have a place to store their sticks, eliminating the hazards of ...loose sticks on dressing room floors and behind benches. Stik-Rak also solves the problem of carrying sticks in an awkward manner. Coaches and trainers can carry up to 16 hockey sticks and still have one hand free.
