intrinsic-factor and Uterine-Cervical-Neoplasms

The skin represents a physical and chemical barrier against invading pathogens, which is additionally supported by restriction factors that provide intrinsic cellular immunity. These factors detect viruses to block their replication cycle. Here, we uncover the Myb-related transcription factor, partner of profilin (MYPOP) as a novel antiviral protein. It is highly expressed in the epithelium and binds to the minor capsid protein L2 and the DNA of human papillomaviruses (HPV), which are the primary causative agents of cervical cancer and other tumors. The early promoter activity and early gene expression of the oncogenic HPV types 16 and 18 is potently silenced by MYPOP. Cellular MYPOP-depletion relieves the restriction of HPV16 infection, demonstrating that MYPOP acts as a restriction factor. Interestingly, we found that MYPOP protein levels are significantly reduced in diverse HPV-transformed cell lines and in HPV-induced cervical cancer. Decades ago it became clear that the early oncoproteins E6 and E7 cooperate to immortalize keratinocytes by promoting degradation of tumor suppressor proteins. Our findings suggest that E7 stimulates MYPOP degradation. Moreover, overexpression of MYPOP blocks colony formation of HPV and non-virally transformed keratinocytes, suggesting that MYPOP exhibits tumor suppressor properties.

Topics: Capsid Proteins; Cell Line, Tumor; DNA, Viral; Female; Host-Pathogen Interactions; Human papillomavirus 16; Human papillomavirus 18; Humans; Intrinsic Factor; Keratinocytes; Oncogene Proteins, Viral; Papillomavirus E7 Proteins; Papillomavirus Infections; Promoter Regions, Genetic; Proto-Oncogene Proteins c-myb; Transcription Factors; Uterine Cervical Neoplasms

Although adhering to regular screenings can improve timely diagnosis and survivorship, Latinas continue to exhibit the lowest breast and cervical cancer screening rates in the country. Initiatives have generally addressed extrinsic factors to combat disparities. However, the answer to increasing screening adherence among Latina women might lie in equally addressing intrinsic factors as well extrinsic factors. Social Cognitive Theory provided the foundation for the design of Esperanza y Vida, a culturally tailored outreach program that educated Latinas on breast and cervical cancer. Non-adherent participants were offered navigation and followed-up to reassess screening behavior. The objective of this manuscript is to outline the salient culture-related intrinsic factors reported by a sample of Latina women from New York and Arkansas in response to open-ended questions asked at 8 months post-educational intervention and navigation services. In turn, the findings are incorporated in an effort to recommend future steps for effective interventions. Content analysis was used to guide the qualitative data analysis. The most salient barriers reported were related to Systems, Organization and Logistics, Time, being Decidedly Unscreened, and Contrary Beliefs or Confusion.

Topics: Adult; Aged; Arkansas; Breast Neoplasms; Early Detection of Cancer; Female; Health Knowledge, Attitudes, Practice; Hispanic or Latino; Humans; Intrinsic Factor; Middle Aged; New York; Uterine Cervical Neoplasms