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  • American Association for Cancer Research (AACR)  (13)
  • 1
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 69, No. 6 ( 2009-03-15), p. 2577-2587
    Kurzfassung: Cancer susceptibility is essentially attributable to multiple low-penetrance genes. Using interspecific consomic and congenic mice between the tumor-resistant SEG/Pas and the tumor-sensitive C57BL/6J strains, a region on chromosome 19 involved in the genetic resistance to γ-irradiation–induced T-cell lymphomas (Tlyr1) has been identified. Through the development of nonoverlapping subcongenic strains, it has been further shown that Anxa1 may be a candidate resistance gene on the basis of its differential expression in thymus stroma cells after γ-radiation exposure. In addition, thymus stroma cells of thymic lymphomas exhibited a significant reduction in the expression levels of Anxa1. Interestingly, the activity of Anxa1 relies on prostaglandin E2 (PGE2) induction that brings about apoptosis in thymocytes. In fact, in vitro transfection experiments revealed that PGE2 production was enhanced when HEK 293 cells were transfected with full-length cDNAs of Anxa1, with PGE2 production in the cells transfected with the allele of the resistant strain (Anxa1Tyr) being higher than that in cells transfected with the allele of the susceptible strain (Anxa1Phe). Furthermore, the presence of this compound in the medium induced apoptosis of immature CD4+CD8+CD3low cells in a dose-dependent manner. These results improve our knowledge of the molecular mechanisms triggering T-cell lymphoblastic lymphoma development while highlighting the relevance of the stroma in controlling genetic susceptibility and the use of PGE2 as a new therapeutic approach in T-cell hematologic malignancies. [Cancer Res 2009;69(6):2577–87]
    Materialart: Online-Ressource
    ISSN: 0008-5472 , 1538-7445
    RVK:
    RVK:
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2009
    ZDB Id: 2036785-5
    ZDB Id: 1432-1
    ZDB Id: 410466-3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Online-Ressource
    Online-Ressource
    American Association for Cancer Research (AACR) ; 2017
    In:  Cancer Epidemiology, Biomarkers & Prevention Vol. 26, No. 7 ( 2017-07-01), p. 1043-1052
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 26, No. 7 ( 2017-07-01), p. 1043-1052
    Kurzfassung: Background: Male genital human papillomavirus (HPV) prevalence and incidence has been reported to vary by geographical location. Our objective was to assess the natural history of genital HPV by country among men with a median of 48 months of follow-up. Methods: Men ages 18–70 years were recruited from United States (n = 1,326), Mexico (n = 1,349), and Brazil (n = 1,410). Genital specimens were collected every 6 months and HPV genotyping identified 37 HPV genotypes. Prevalence of HPV was compared between the three countries using the Fisher exact test. Incidence rates and 95% confidence intervals were calculated. The median time to HPV clearance among men with an incident infection was estimated using the Kaplan–Meier method. Results: The prevalence and incidence of the genital HPV types known to cause disease in males (HPV 16 and 6) was significantly higher among men from Brazil than men from Mexico. Prevalence and incidence of those genital HPV types in the United States varied between being comparable with those of Mexico or Brazil. Although genital HPV16 duration was significantly longer in Brazil (P = 0.04) compared with Mexico and the United States, HPV6 duration was shortest in Brazil (P = 0.03) compared with Mexico and the United States. Conclusions: Men in Brazil and Mexico often have similar, if not higher prevalence of HPV compared with men from the United States. Impact: Currently, there is no routine screening for genital HPV among males and while HPV is common in men, and most naturally clear the infection, a proportion of men do develop HPV-related diseases. Men may benefit from gender-neutral vaccine policies. Cancer Epidemiol Biomarkers Prev; 26(7); 1043–52. ©2017 AACR.
    Materialart: Online-Ressource
    ISSN: 1055-9965 , 1538-7755
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2017
    ZDB Id: 2036781-8
    ZDB Id: 1153420-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 17, No. 8 ( 2008-08-01), p. 2036-2043
    Kurzfassung: Male sexual behavior influences the rates of cervical dysplasia and invasive cervical cancer, as well as male human papillomavirus (HPV) infection and disease. Unfortunately, little is known regarding male HPV type distribution by age and across countries. In samples combined from the coronal sulcus, glans penis, shaft, and scrotum of 1,160 men from Brazil, Mexico, and the United States, overall HPV prevalence was 65.2%, with 12.0% oncogenic types only, 20.7% nononcogenic types only, 17.8% both oncogenic and nononcogenic, and 14.7% unclassified infections. Multiple HPV types were detected in 25.7% of study participants. HPV prevalence was higher in Brazil (72.3%) than in the United States (61.3%) and Mexico (61.9%). HPV16 (6.5%), HPV51 (5.3%), and HPV59 (5.3%) were the most commonly detected oncogenic infections, and HPV84 (7.7%), HPV62 (7.3%), and HPV6 (6.6%) were the most commonly detected nononcogenic infections. Overall HPV prevalence was not associated with age. However, significant associations with age were observed when specific categories of HPV, nononcogenic, and unclassified HPV infections were considered. Studies of HPV type distribution among a broad age range of men from multiple countries is needed to fill the information gap internationally with respect to our knowledge of HPV infection in men. (Cancer Epidemiol Biomarkers Prev 2008;17(8):2036–43)
    Materialart: Online-Ressource
    ISSN: 1055-9965 , 1538-7755
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2008
    ZDB Id: 2036781-8
    ZDB Id: 1153420-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Online-Ressource
    Online-Ressource
    American Association for Cancer Research (AACR) ; 2010
    In:  Cancer Epidemiology, Biomarkers & Prevention Vol. 19, No. 10_Supplement ( 2010-10-01), p. A90-A90
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 19, No. 10_Supplement ( 2010-10-01), p. A90-A90
    Kurzfassung: Introduction: Nonmelanoma skin cancers (NMSC) including basal cell and squamous cell carcinomas are the most common human cancers. DNA damage can be caused by exposure to solar UV light and other types of radiation, dietary factors, and ageing. The relationship between DNA damage and oncogenesis suggests that diminished DNA repair capacity (DRC) is involved in tumorigenesis. Purpose: The purpose of this study was to identify and assess selected exposures and DRC as predictors for NMSC in Puerto Rico. Methods: An incident-cases case-control study was conducted. A total of 477 NMSC cases and 365 controls were compared regarding DRC levels and other selected factors. Participants with low and high DRC levels were also compared regarding the same factors as in NMSC. DRC was measured using a host-cell reactivation assay with a luciferase reporter gene irradiated with UV light and transfected into human peripheral lymphocytes from participant's blood samples. A standardized epidemiological questionnaire was used to collect data from the participants. The crude and multiple logistic regression adjusted odds ratio was used to assess the associations between NMSC or DRC levels with selected factors after adjusting for age, gender, skin, hair, and eye color, and other potential confounders simultaneously. Results: Exposures increasing the odds for NMSC were being male, aging, light skin, presence of freckles, light hair, light eye color, increased sun exposure, severe insolations, family history of NMSC, and low DRC (p & lt; 0.05). Protective factors found in the study included using sun block, taking aspirin regularly, and multivitamin supplements intake (p & lt; 0.05). Factors associated with low DRC level were aging, light skin, sun exposure, severe insolations and not using sun block regularly. Discussion: The present study identified major epidemiologic factors for NMSC in Puerto Rico that are consistent with similar investigations elsewhere. Low DRC was strongly associated with NMSC (Matta et al, 2003). New unpublished data include the finding of the protective effect of multivitamin supplementation. Light skin, increased sun exposure, severe insolations and not using sun block regularly were associated with low DRC. Conclusions: The protective effect of multivitamins deserves further consideration to confirm our findings. Persons with light skin, increased sun exposure and not using sun block regularly had low DRC levels and increased odds for NMSC. DRC measurements might be used to monitor the potential preventive impact of multivitamins and sun block when used as preventive therapy. Citation Information: Cancer Epidemiol Biomarkers Prev 2010;19(10 Suppl):A90.
    Materialart: Online-Ressource
    ISSN: 1055-9965 , 1538-7755
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2010
    ZDB Id: 2036781-8
    ZDB Id: 1153420-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 21, No. 9 ( 2012-09-01), p. 1542-1546
    Kurzfassung: Background: It is largely unknown if antihuman papillomavirus (HPV) serum antibody responses vary by anatomic site of infection in men. Methods: This study assessed type-specific anti-HPV serum antibody prevalence associated with corresponding HPV DNA detection in the external genitalia and the anal canal of 1,587 heterosexual men and 199 men who have sex with men (MSM). Results: We observed that HPV 6 and 16 seroprevalence was higher in the presence of same HPV-type infection in the anal canal compared with same HPV-type infection in the external genitalia only, and among MSM compared with the heterosexual men. Seropositivity to HPV 6 was strongly associated with HPV 6 DNA detection in the anal canal but not in the external genitalia alone among both heterosexual men [adjusted prevalence ratio (APR), anal+/genital+ vs. anal−/genital−: 4.2, 95% confidence interval (CI), 11.7–10.5; anal+/genital− vs. anal−/genital−: 7.9 (95% CI, 3.7–17.0)] and MSM [APR, anal+/genital+ vs. anal−/genital−: 5.6 (95% CI, 2.7–11.9); anal+/genital− vs. anal−/genital−: 3.2 (95% CI, 2.1–4.9)] . Similar associations between seropositivity to HPV 16 and anal HPV 16 DNA detection were only observed in MSM [anal+/genital+ vs. anal−/genital−: 3.1 (95% CI, 2.0–5.0); anal+/genital− vs. anal−/genital−: 2.2 (95% CI, 1.3–3.5)] . Conclusion: Our data showed that seroprevalence varied by anatomic site of HPV infection, suggesting differences in epithelium type present at these anatomic sites may be relevant. Impact: Our finding is instrumental in advancing our understanding of immune mechanism involved in anatomic site–specific antibody response. Cancer Epidemiol Biomarkers Prev; 21(9); 1542–6. ©2012 AACR.
    Materialart: Online-Ressource
    ISSN: 1055-9965 , 1538-7755
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2012
    ZDB Id: 2036781-8
    ZDB Id: 1153420-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Online-Ressource
    Online-Ressource
    American Association for Cancer Research (AACR) ; 2013
    In:  Cancer Epidemiology, Biomarkers & Prevention Vol. 22, No. 10 ( 2013-10-01), p. 1762-1770
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 22, No. 10 ( 2013-10-01), p. 1762-1770
    Kurzfassung: Background: This analysis assessed the acquisition (incidence) and persistence (clearance) of human papilloma virus (HPV) infection by self-reported race among men in The HPV in Men (HIM) Study, a multinational prospective study of the natural history of genital HPV infections. Methods: Self-reported race was categorized as White, Black, Asian/Pacific Islander (PI), or multiple and mixed race. Genital samples were combined for HPV DNA testing and categorized by any, oncogenic, and non-oncogenic HPV infections. Results: Asian/PI race had significantly the lowest incidence of any, oncogenic, and non-oncogenic HPV infection (P & lt; 0.001). In multivariable analyses, Asian/PI race was associated with a lower probability of acquiring any [HR = 0.63; 95% confidence interval (CI), 0.42–0.95] and non-oncogenic HPV infection (HR = 0.61; 95% CI, 0.40–0.93) when compared to Whites. No significant associations were evident for Asian/PI race for clearance. Multiple and mixed race was significantly associated with lower probability of acquiring non-oncogenic HPV infection (HR = 0.83; 95% CI, 0.69–0.99) and borderline significant associations were observed for any HPV (HR = 0.91) and oncogenic infections (HR = 0.92). Multiple and mixed race was associated with a lower probability of clearing any (HR = 0.92; 95% CI, 0.84–1.00) and oncogenic HPV infections (HR = 0.85; 95% CI, 0.75–0.95). Conclusion: Asian/PI race had the lowest incidence of HPV and exhibited a lower probability of acquiring new HPV infections. Multiple and mixed race had the second lowest incidence of infection and was associated with a lower probability of acquiring and clearing an HPV infection. Impact: Race-specific differences in HPV infection could be due to behavior, innate genetic differences, or circulating intratypic HPV variants. Cancer Epidemiol Biomarkers Prev; 22(10); 1762–70. ©2013 AACR.
    Materialart: Online-Ressource
    ISSN: 1055-9965 , 1538-7755
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2013
    ZDB Id: 2036781-8
    ZDB Id: 1153420-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    In: Cancer Prevention Research, American Association for Cancer Research (AACR), Vol. 15, No. 12_Supplement_2 ( 2022-12-01), p. A002-A002
    Kurzfassung: This poster describes logistical issues related to implementing a randomized, double- blinded, placebo-controlled Phase III interventional trial on the nine-valent HPV vaccine (9vHPV) among cisgender men and transgender women living with HIV, at the Mexico site. The trial seeks to demonstrate that 9vHPV reduces the incidence of persistent oral HPV infection (a surrogate for HPV-associated oropharyngeal cancer) with the 9 vaccine types. Five-hundred participants will be randomized in a 1:1 allocation to receive 9vHPV or placebo, stratified based on clinical site (Brazil, Mexico, Puerto Rico) and age. The team invites potential participants through local community organizations and public HIV clinics. People may be invited when waiting in line in the morning to get laboratory testing done, when they have an appointment for HIV care or through their treating physician or a community organizer. Initially, we worked at a single HIV clinic, although we did distribute study flyers to treating physicians at other clinics. As of mid-2022 we began enrolling at two additional clinics. Participants are prescreened when initially invited or by phone to prevent unnecessary trips for those ineligible. Once prescreened, participants are given an appointment for their first study visit; reminders about their first or other study visits are sent by text message 2-3 times before the appointment. Participants are provided with financial compensation in cash at each visit. We have implemented both study-wide mechanisms and additional locally-designed strategies and forms to guarantee quality control. For example, registering participant issues, study agent trail and persons invited, pre-screened and enrolled (including reasons for exclusion). Data is registered on paper forms and in a bespoke data base program (DatStat, designed at Moffitt Cancer Center). DatStat carries out the randomization (only the Mexico site pharmacist is unblinded) and requires a wireless internet connection, which can sometimes fail even though a router is installed by the study at each clinic. Vaccine and syringe importation can be time consuming and cause enrollment delays, given the need to acquire permissions for importation or problems getting the shipment out of Customs. Making sure shipments go through an airport with better functioning Customs offices is also important. Citation Format: Betania Allen-Leigh, Alejandra Portillo-Romero, Manuel Quiterio, Maribel Acosta, Abraham Rivera- Ramirez, Guillermina Sanchez, Aurelio Cruz, Tonatiuh Barrientos, Carlos Magis, Kimberly Isaacs-Soriano, Martha E. Abrahamsen, Margaret House, Emma Brofsky, Vikrant Sahasrabuddhe, Timothy Wilkin, Anna Giuliano, Luisa Villa, Eduardo Lazcano-Ponce. Logistical issues in implementing a clinical trial on oral cancer prevention through HPV vaccination: Implementation of Ulacnet201 in Mexico [abstract]. In: Proceedings of the Second Biennial NCI Meeting: Translational Advances in Cancer Prevention Agent Development (TACPAD); 2022 Sep 7-9. Philadelphia (PA): AACR; Can Prev Res 2022;15(12 Suppl_2): Abstract nr A002.
    Materialart: Online-Ressource
    ISSN: 1940-6215
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2022
    ZDB Id: 2422346-3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 72, No. 3 ( 2012-02-01), p. 676-685
    Kurzfassung: In women, naturally induced anti–human papilloma virus (HPV) serum antibodies are a likely marker of host immune protection against subsequent HPV acquisition and progression to precancerous lesions and cancers. However, it is unclear whether the same is the case in men. In this study, we assessed the risk of incident genital infection and 6-month persistent genital infection with HPV16 in relation to baseline serostatus in a cohort of 2,187 men over a 48-month period. Genital swabs were collected every 6 months and tested for HPV presence. Incidence proportions by serostatus were calculated at each study visit to examine whether potential immune protection attenuated over time. Overall, incidence proportions did not differ statistically between baseline seropositive and seronegative men at any study visit or over the follow-up period. The risk of incident and 6-month persistent infection was not associated with baseline serostatus or baseline serum antibody levels in the cohort. Our findings suggest that baseline HPV seropositivity in men is not associated with reduced risk of subsequent HPV16 acquisition. Thus, prevalent serum antibodies induced by prior infection may not be a suitable marker for subsequent immune protection against genital HPV16 acquisition in men. Cancer Res; 72(3); 676–85. ©2011 AACR.
    Materialart: Online-Ressource
    ISSN: 0008-5472 , 1538-7445
    RVK:
    RVK:
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2012
    ZDB Id: 2036785-5
    ZDB Id: 1432-1
    ZDB Id: 410466-3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    In: Cancer Research, American Association for Cancer Research (AACR), Vol. 76, No. 20 ( 2016-10-15), p. 6066-6075
    Kurzfassung: Naturally induced serum antibodies against human papillomavirus (HPV) may affect risks of subsequent incident genital infections by HPV 6, 11, 16, or 18 in men. In this study, we examined the hypothesis by following 4,123 healthy men every 6 months (median follow-up time, 4.1 years). HPV antibodies were measured at baseline using a virus-like particle-based ELISA assay. Genital HPV genotypes were detected using Roche Linear Array. Incidence proportions and 6-month persistence proportions were calculated at 6-month intervals. Kaplan–Meier curves and Cox models were used to assess genotype-specific cumulative incidence and HRs, respectively. HPV 6, 11, 16, and 18 seroprevalence was 8.1%, 13.9%, 12.7%, and 10.8%, respectively. Significantly higher rates of incident infections were observed for HPV 16 among baseline-seropositive men [adjusted HR, 1.37; 95% confidence interval (CI), 1.01–1.86], with similar but nonsignificant HRs for 6-month persistent infections. Risk of persistent HPV 18 infection was significantly lower among seropositive men in the unadjusted model (HR, 0.22; 95% CI, 0.06–0.91), but not in the adjusted model (HR, 0.19; 95% CI, 0.03–1.37). Incident and 6-month persistent infections for HPV 6 and 11 did not differ by baseline serostatus. Baseline serostatus among men was not associated with a reduction in subsequent incident genital HPV 6, 11, and 16 infections. However, protection against persistent HPV18 infections was observed in unadjusted models. Our research suggests a need of further studies to examine the potentially protective effects of naturally induced HPV18 antibodies in men. Cancer Res; 76(20); 6066–75. ©2016 AACR.
    Materialart: Online-Ressource
    ISSN: 0008-5472 , 1538-7445
    RVK:
    RVK:
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2016
    ZDB Id: 2036785-5
    ZDB Id: 1432-1
    ZDB Id: 410466-3
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    In: Cancer Epidemiology, Biomarkers & Prevention, American Association for Cancer Research (AACR), Vol. 20, No. 5 ( 2011-05-01), p. 990-1002
    Kurzfassung: Background: Few human papillomavirus (HPV) serology studies have evaluated type-specific seroprevalence of vaccine HPV types in men. This study investigates seroprevalence of HPV 6, 11, 16, and 18, and associated risk factors in men residing in three countries (United States, Mexico, and Brazil). Methods: Data from 1,477 men aged 18 to 70 enrolled in the HPV Infection in Men Study (HIM Study) were analyzed. Serum antibody testing was performed with virus-like particle-based ELISA. Potential risk factors were assessed for individual HPV types by the use of logistic regression. Results: Overall, HPV-6, 11, 16, and 18 seroprevalence was 14.8%, 17.3%, 11.2%, and 5.8%, respectively. Thirty-four percent of men were seropositive to one or more HPV types. When examined by sexual practice, 31.2% of men who had sex with women, 65.6% of men who had sex with men (MSM), and 59.4% of men who had sex with both men and women (MSMW) were seropositive to one or more HPV types. Seroprevalence increased with age among young-to-middle-aged men with significant upward age trends observed for HPV 11, 16, and 18. Men with multiple lifetime male anal sex partners were 2 to 4 times more likely to be HPV 6 or 11 seropositive and 3 to 11 times more likely to be HPV 16 or 18 seropositive. Conclusion: Our data indicate that exposures to vaccine HPV types were common in men and highly prevalent among MSM and MSMW. Impact: Our study provides strong evidence that the practice of same-sex anal intercourse is an independent risk factor for seroprevalence of individual vaccine HPV types. Examination of antibody responses to HPV infections at various anatomic sites in future studies is needed to elaborate on the mechanism. Cancer Epidemiol Biomarkers Prev; 20(5); 990–1002. ©2011 AACR.
    Materialart: Online-Ressource
    ISSN: 1055-9965 , 1538-7755
    Sprache: Englisch
    Verlag: American Association for Cancer Research (AACR)
    Publikationsdatum: 2011
    ZDB Id: 2036781-8
    ZDB Id: 1153420-5
    Standort Signatur Einschränkungen Verfügbarkeit
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