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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Resposta imune in vitro aos antígenos de Papilomavírus Humano (HPV) em homens na cidade de São Paulo, Brasil / In vitro immune response to antigens of human papillomavirus (HPV) in men of Sao Paulo, Brasil

Costa, Fernando Augusto Miranda da 18 November 2013 (has links)
Introdução: O Papilomavírus Humano está muito bem associado com diversos tipos de cânceres humanos, como câncer anogenital e oral. Alguns estudos demonstram que o aparecimento de lesões e a progressão para o câncer estão relacionados ao tipo de resposta imune do hospedeiro. Deste modo, evidências indicam que a resposta imune do hospedeiro tem um papel muito importante para o curso da infecção pelo HPV. Objetivo: Avaliar a resposta imune específica in vitro ao Papilomavírus Humano (HPV) em homens com lesões causadas por HPV e sem lesão por HPV. Material e Métodos: Foram recrutados 31 pacientes e 11 voluntários, que formaram 4 grupos de estudo; sendo 12 pacientes no Grupo A (HIV +/ HPV +); 09 pacientes no Grupo B (HIV-/HPV+); 10 pacientes no Grupo C (HIV+/ HPV-); e 11 indivíduos saudáveis no Grupo D (HIV-/HPV-). Foram realizados ensaios de cultura celular para mensurar a resposta celular específica \"in vitro\" do tipo Th1/Th2/Th17 (INF-y, IL-2, TNFalfa, IL-4, IL-10 e IL-17) sob o estímulo da vacina quadrivalente do HPV (HPV 6, 11, 16 e 18) e à proteína E7 de HPV-16. Resultados: O grupo coinfectado (HIV +/ HPV+) apresentou níveis mais elevados de citocinas, principalmente do perfil Th2, comparando-se com os dados dos demais grupos de estudo. O grupo coinfectado apresentou níveis elevados de IL-6 e IL-10 (Perfil Th2) em relação ao grupo controle (HIV-/HPV-), com significância estatística (p < 0.0001 e p < 0.0001, respectivamente). Conclusão: Foi demonstrada uma elevada produção de citocinas no grupo HPV+/HIV+, sugerindo uma forte imunomodulação pela coinfecção HIV/HPV. Entretanto, novos estudos devem ser realizados para comprovar estes dados. Além de apresentar um perfil essencialmente Th2 do grupo coinfectado, principalmente pelos níveis elevados de IL-6 e IL-10 apresentados, sugerindo que estas duas citocinas possam servir como biomarcadores para persistência viral, uma vez que, os pacientes soropositivos para HIV apresentam maior persistência de HPV, e monitorar a progressão para lesões mais graves / Introduction: Human Papillomavirus is associated with different types of human cancers, such as anogenital and oral cancer. Some studies show that the appearance of lesions and progression to cancer are related to the type of host immune response. Thus, evidence indicates that the host immune response has a role key in the course of HPV infection. Objective: To evaluate the specific immune response in vitro to HPV in men with lesions caused by HPV and without injury caused by HPV. Methods: We recruited 31 patients and 11 volunteers, who formed four groups, with 12 patients in Group A (HIV+/HPV+); 09 patients in Group B (HIV-/HPV+); 10 patients in Group C (HIV+/HPV-) and 11 healthy subjects in Group D (HIV-/HPV-). Cells culture assay was performed to measure the specific immune response \"in vitro\" Th1/Th2/Th17 (IFN-y, IL-2, TNF-alfa, IL-4, IL-10 and IL-17) under the stimulation of quadrivalent HPV vaccine (HPV 6, 11, 16 and 18) and the E7 protein of HPV-16. Results: The coinfected group (HIV+/HPV+) had higher levels of cytokines, especially Th2 profile, compared with data from the other study groups. The coinfected group showed high levels of IL-6 and IL-10 (Th2 profile) compared to the control Group (HIV- /HPV-), with statistical significance (p < 0.0001 and p < 0.0001, respectively). Conclusion: This study demonstrated a high production of cytokines in the coinfected group, suggesting a strong immunomodulation by coinfection HIV/HPV. However, further studies should be conducted to confirm these data. In addition to presenting essentially a Th2 profile, especially by high levels of IL-6 and IL-10 presented, suggesting that these two cytokines may serve as biomarkers for viral persistence, since HIV seropositive patients have a higher persistence of HPV, and monitor the progression to more serious injuries
92

Associação entre alta expressão e atividade de metaloproteinases e presença de HPV em linhagens de carcinomas cervicais humanos / Higher expression and activity of metalloproteinases is associated with HPV presence in human cervical carcinomas cell lines

Cardeal, Laura Beatriz da Silva 02 June 2006 (has links)
A ação das metaloproteinases de matriz (MMP-2, MMP-9 e MT1-MMP) é necessária para degradação da membrana basal em carcinomas da cérvice uterina. O objetivo deste trabalho consistiu na avaliação da expressão das metaloproteinases MMP -2, -9 e MT1-MMP, do gene supressor de metástase RECK e do inibidor tecidual de MMPs (TIMP-2) em modelo de células de neoplasia da cérvice-uterina cultivadas em substratos de matriz extracelular. As linhagens celulares de carcinoma de cérvice uterina SiHa, CaSki, ambas HPV 16 positivas, e C33A, HPV negativa, foram cultivadas em gel de colágeno tipo I, Matrigel e plástico. Avaliou-se o crescimento, invasão, expressão gênica, através de ensaios de real-time PCR, e atividade de metaloproteinases, através de ensaios de zimografia. Os resultados demonstraram que estas linhagens de carcinoma cervical quando cultivadas em gel de colágeno tipo I apresentaram uma diminuição no crescimento, morfologia modificada na presença de substrato de matriz extracelular, e que nas linhagens HPV positivas há um aumento da expressão de MMP-2, MT1-MMP e TIMP-2 e da atividade de pró-MMP-2 em relação à linhagem HPV negativa. Observou-se também que, RECK apresentou maior expressão gênica em CaSki associada à atividade de pró-MMP-2. MMP-9 apresentou muito baixa expressão gênica em todas as linhagens e condições estudadas. Quando analisamos as linhagens separadamente, observamos que o Matrigel influenciou a expressão gênica de MMP-2, e que o gel de colágeno tipo I aparece como indutor da atividade de pró-MMP-2 em todas as linhagens. Em conclusão, nossos resultados mostram que a expressão de MMP-2, MT1-MMP e TIMP-2 e que a atividade de pró-MMP-2 estão aumentadas nas células HPV positivas, sugerindo que o HPV está associado com a expressão de MMPs e TIMP-2. / Matrix metalloproteinases (MMPs) -2, -9, and MT1-MMP are required for basement membrane degradation in cervical carcinoma. We evaluated the expression and activity of MMPs and their inhibitors RECK and TIMP-2 in three human invasive cervical carcinoma cell lines. Two HPV-16- positive cell lines (SiHa and CaSki), HPV-negative cell line (C33A) were cultured either onto type-I collagen gel, Matrigel or plastic, in order to recreate their three-dimensional growth environment and evaluate the growth and invasion of the cells and expression of these genes using quantitative real-time PCR (Q-PCR). We also analyzed the gelatinolytic activity of MMP-2 and -9 by zymography. We found that the growth curves carcinoma cells are decreased and cells morphology are modified in ECM substrate. HPV-positive cell lines expressed higher levels of MMP-2, MT1-MMP and TIMP-2 than the HPV negative cell line. In addition, MMP-9 was expressed at very low levels in both HPV-negative and HPV-positive cell lines. We also observed that the expression of the RECK gene is higher in CaSki cells, being associated with pro-MMP-2 activity. The Matrigel substrate influence MMP-2 expression for SiHa and CaSki cells. On the other hand, we found that type-I collagen gel, but not Matrigel, can enhance pro-MMP-2 activity in all cell lines. Our results suggest that the presence of HPV is related to increased expression of MMP -2, MT1-MMP and TIMP-2 and pro-MMP-2 activity in HPV-positive cells than in HPV-negative cells.
93

Estudo de células dendríticas, expressão das citocinas TNF-alfa, IFN-gama e IL-10 e da molécula de adesão E-caderina em lesões vulvares induzidas pelo papilomavírus humano / Study of dendritic cells, cytokines TNF-alpha, IFN-gamma and IL-10 and the adhesion molecule E-cadherin in vulvar lesions induced by human papillomavirus

Naiura Vieira Pereira 14 April 2009 (has links)
INTRODUÇÃO: O papilomavírus humano (HPV) é o agente mais frequentemente encontrado em doenças sexualmente transmissíveis e é responsável por cerca de 40% dos cânceres vulvo-vaginais. Esse trabalho abordou a resposta imune em lesões vulvares, considerando-se as células dendríticas CD1a+, FXIIIa+ e S-100+, citocinas TNF-, IFN- e IL-10 e a molécula de adesão E-caderina. MÉTODOS: Foram utilizadas 49 lesões de vulva pelo HPV (condiloma acuminado, NIV-I, NIV-II e NIV-III) e 11 bióspias com diagnóstico de vulvite crônica inespecífica. Foram constituídos quatro grupos: lesões de baixo grau (condiloma e NIV I), lesões de alto grau (NIV II e III), vulvites inespecíficas e pele normal. A detecção das células, citocinas e E-caderina foi feita através de método imuno-histoquímico. RESULTADOS: As células de Langerhans (CD1a+) estavam distribuídas em todo o epitélio, sobretudo nas camadas suprabasal e espinhosa. Não diferiram entre os grupos de lesões HPV+, mas estavam diminuídas em número e tamanho quando comparadas à pele normal (p<0.0001). As células S-100+ ou FXIIIa+ estavam localizadas em toda a extensão do estroma, sem diferença estatística entre as lesões pelo HPV. Embora os DDFXIIIa+ estivessem aumentados em tamanho nas lesões de vulva, seu número não diferiu da pele normal. Não se observou diferenças numéricas das células S-100+ entre os grupos de lesão e pele normal. Foi possível detectar maior número de DDFXIIIa+ sobre as células S-100+ no grupo de lesões de baixo grau (p = 0,0008) e de alto grau (p = 0,0031). As citocinas foram detectadas em pequenas quantidades nos grupos de lesões, porém sem diferença estatística. Para a análise da expressão de e-caderina, o grupo de vulvites crônicas inespecíficas foi utilizado como controle. Em 91.0% das vulvites inespecíficas foi observado padrão homogêneo e difuso da expressão de e-caderina na camada espinhosa baixa e média. Ambos os grupos de lesões HPV+ exibiram padrões semelhantes de expressão de e-caderina, com marcação difusa ou focal na camada espinhosa baixa e média. Não houve imuno-reatividade nas áreas de displasias. Como resultado da reação de dupla-marcação, feita através da utilização da hibridização in situ para detecção do DNA do HPV e imunohistoquímica para DDFXIIIa+, foi possível identificar antígenos virais no citoplasma dessas células. CONCLUSÕES: o HPV interfere na expressão das células de Langerhans, pois estas estavam diminuídas, com morfologia alterada em relação à pele normal; os DDFXIIIa+ apresentam-se aumentados em número sobre as células S-100+, o que poderia refletir um mecanismo local compensatório contra o HPV; as lesões de baixo e alto grau não apresentam diferenças significativas quanto à densidade de células expressando TNF-, IFN- e IL-10, embora TNF- predomine entre as três citocinas; há uma correlação positiva entre os DDFXIIIa+ e a expressão de TNF-, o que poderia ser explicado por sua capacidade em produzir tal citocina a partir de um provável estímulo desencadeado pelo HPV; o HPV influencia na expressão de E-caderina na vulva, com destaque para a ausência de expressão nas áreas de displasia; o DNA do HPV encontrado no interior dos DDFXIIIa+ aliado às alterações na morfologia celular, a sobreposição destas sobre as células S-100+ e a relação encontrada com a citocina TNF-, nos permitem sugerir que os DDFXIIIa+ têm um papel importante como células apresentadoras de antígeno frente à infecção pelo HPV. / INTRODUCTION: The human papillomavirus (HPV) is the most frequent agent in sexually transmitted diseases and is responsible for almost 40% of vulvovaginal cancer. We studied the immune response in vulvar lesions, considering the CD1a+, FXIIIa+ and S-100+ dendritic cells, TNF-, IFN- and IL-10 cytokines and the adhesion molecule E-cadherin. METHODS: We used 49 vulvar lesions mediated by HPV (condylomata acuminata, VIN-I, VIN-II e VIN-III) and 11 biopsies diagnosed as chronic non-specific vulvitis. Four groups were formed: low-grade lesions (condylomata and VIN-I), high-grade lesions (VIN-II and III), non-specific vulvitis and normal skin. The detection of cells, cytokines and e-cadherin was performed by immunohistochemistry reaction. RESULTS: Langerhans cells (CD1a+) were distributed through epithelia, mainly in suprabasal and spinous layer. They did not differ between HPV groups, but were decreased in number and size when compared to normal skin (p<0.0001). The S-100+ ou FXIIIa+ cells were distributed through stroma and did not differ between HPV lesions. Although the FXIIIa+DD were increased in size in vulvar lesions, their number did not differ from normal skin. The S-100+ cells did not differ in number between the groups of lesions and normal skin. We detected an increased number of FXIIIa+DD over S-100+ cells in the group of low-grade (p = 0.0008) and high-grade lesions (p = 0.0031). The cytokines were detected in small quantities in both the lesions groups, with no statistical difference. The group of chronic non-specific vulvitis was used as control group to analyse the expression of e-cadherin. 91.0% of non-specific vulvitis presented a homogeneous and diffuse pattern of expression in spinous layer Both the HPV+ groups of lesions presented similar patterns of e-cadherin expression, with a focal or diffuse localization in spinous layer. The dysplastic epithelium did not present immunoreactivity. As a result of the double-staining, using in situ hibridization to detect DNA of HPV and immunohistochemistry to FXIIIa+DD, it was possible to observe viral antigens in the cytoplasm of such cells. CONCLUSIONS: The HPV interfere with the expression of Langerhans cells, since they were decreased when compared to the normal skin; the FXIIIa+DD were increased in number over S-100+ cells, suggesting a local compensatory mechanism against the HPV; the low and high grade lesions did not differ in the number of cells expressing TNF-, IFN- and IL-10, although TNF- predominate among the three cytokines; there is a positive correlation between the FXIIIa+DD and the expression of TNF- that could be explained by their role as TNF-producing cells following a stimulus of HPV; the HPV changes the expression of E-cadherin in vulvar lesions, mainly in dysplastic epithelium; HPV DNA visualized in the cytoplasm of FXIIIa+DD and the cellular morphological changes, the increased number over S-100+ cells and the correlation with TNF-, allow us to suggest that FXIIIa+DD play an important role as antigen presenting cells in the infection by HPV.
94

Tipos de HPV e câncer do colo uterino: impacto no prognóstico das pacientes com tumores nos estádios iniciais / Human papillomavirus types 16 and 18 and the prognosis of patients with stage I cervical cancer

Zampronha, Rossana de Araújo Catão 29 August 2008 (has links)
Submitted by Erika Demachki (erikademachki@gmail.com) on 2014-09-29T21:15:45Z No. of bitstreams: 2 Dissertação Mestrado Rossana 28-11-12 3pdf.pdf: 712072 bytes, checksum: e167dad92cf8edd8b25298ca4f1f6951 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Jaqueline Silva (jtas29@gmail.com) on 2014-09-29T21:42:41Z (GMT) No. of bitstreams: 2 Dissertação Mestrado Rossana 28-11-12 3pdf.pdf: 712072 bytes, checksum: e167dad92cf8edd8b25298ca4f1f6951 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2014-09-29T21:42:41Z (GMT). No. of bitstreams: 2 Dissertação Mestrado Rossana 28-11-12 3pdf.pdf: 712072 bytes, checksum: e167dad92cf8edd8b25298ca4f1f6951 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2008-08-29 / INTRODUCTION: The cervical cancer is the third most frequent malignant neoplasia among women in Brazil and it is responsible for the fourth cause of death for cancer. It is related among other causes to persistent infection by human papillomavirus. Doubts persist if HPV type could influence the tumor prognosis. OBJECTIVE: To study the prevalence of HPV 18 and HPV 16 in women presenting cervical cancer in clinic stage Ib, treated by radical hysterectomy with linfadenectomy, establishing prognostic correlation. METHODS: A retrospective cohort study, including 86 pacients with cervical cancer Ec I, submitted to radical hysterectomy, in a single center, in which were analysed the known prognostic factors and the positivity to HPV by PCR. Univariate analysis was performed, with Kaplan-Meir curves, for survival estimative. RESULTS: The prevalence of HPV 16 infection was 65.3% and HPV 18 prevalence was 33.3%. To both virus the prevalence was 26.9%. The overall survival for women presenting HPV 18 infection, in sixty months, was 91% and those women without HPV 18 infection, the overall survival was 96%. The overall survival for women with and without HPV16 infection was 94% and 96%, respectively. The disease free survival was not influenced by the presence of either virus. CONCLUSION: In the present study, in spite of the high prevalence of HPV 18 and HPV 16, the presence of these tipes of HPV have not influenced the prognosis of EcI cervixl cancer in women submitted to radical histerectomy. / INTRODUÇÃO: O câncer do colo uterino é a terceira neoplasia maligna mais frequente entre as mulheres no Brasil e entre elas é responsável pela quarta causa de morte por câncer. Está relacionado, entre outras causas, à infecção persistente pelo papilomavirus humano. Persistem dúvidas se o tipo de HPV exerce influência sobre o prognóstico da doença. OBJETIVO: Estudar a prevalência do HPV 18 e HPV 16 em mulheres com o câncer do colo uterino no estádio clínico Ib, tratadas por histerectomia radical com linfadenectomia pélvica, procurando estabelecer correlação prognóstica. MÉTODOS: Estudo de coorte retrospectivo, incluindo 86 pacientes com câncer do colo uterino Ec I, submetidas à histerectomia radical, em um único centro, no qual foram analisados os fatores prognósticos já conhecidos, além da presença do HPV 16 e 18, pesquisado por PCR. Utilizou-se análise univariada, com curvas de Kaplan-Meir, para estimativa de sobrevida. RESULTADOS: A prevalência do HPV 16 no grupo estudado foi de 65,3% e a prevalência do HPV 18 foi de 33,3%. A prevalência dos casos em que houve infecção por ambos os vírus foi de 26,9%. A sobrevida global para as mulheres portadoras do HPV 18, aos sessenta meses, foi de 91% e nas que não eram portadoras desse vírus foi de 96% (NS). Já para as mulheres portadoras do HPV 16 a sobrevida global foi de 94% e para as não portadoras desse vírus a sobrevida foi 96% (NS). A sobrevida livre de doença também não foi influenciada pela presença do HPV 18 e do HPV 16. CONCLUSÃO: No presente estudo, apesar da alta prevalência do HPV 18 e do HPV 16, a presença desses tipos de HPV não influenciaram o prognóstico das pacientes portadoras de câncer de colo uterino, Ec I, submetidas à histerectomia radical.
95

HPV and p16 in head and neck cancer

Sailan, Ahmad Tarmidi January 2010 (has links)
There is some evidence to suggest that human papilloma virus (HPV) may play a causal role in head and neck carcinoma (HNSCC). The aim of this study was to investigate the prevalence of HPV DNA in HNSCC and to determine whether any correlation exists with p16 or survival. An initial pilot study of sixty formalin-fixed HNSCC was carried out in order to optimise the methodology for the PCR and immunohistochemistry. A further 84 benign lesions, 12 dysplasias and additional 80 HNSCC were also included. In the pilot study the prevalence of all HPV types was 67% of which 18% were high risk-HPV (HR-HPV) and for the combined carcinoma sample it was 59% of which 25% were HR-HPV. The overall HPV prevalence was 51% and 42% for benign lesions and dysplasias with HR-HPV accounting for 14% and 8% respectively. A total of four alpha HPV types were identified and eleven beta HPV types. Multiple HPV types co-existed in the same tissue and in some cases both alpha and beta HPV. The results may suggest that HR-HPV may play a role in a small subset of HNSCC. An association was found between HPV status and gender, age group, survival, nodal metastasis and T3 tumour size and smoking. HPV16 was predominantly present in female patients and was associated with an improved overall survival and recurrence free survival. p16 positivity varied from 76-78% in carcinomas, 51% in benign lesions and 66% in dysplasias. p16 status was not associated with disease recurrence or nodal metastasis. Positive p16 staining and high staining intensity was associated with a poorer overall survival and the male gender, an older age group, anatomic site, and T2 tumour size. Overall HPV status was not correlated with p16 expression but a correlation found between p16 and HPV16 may suggest that p16 could potentially act as a surrogate marker of HPV16. However, the lack of concordance would suggest that in isolation p16 may not be a reliable marker for HR-HPV and should not be relied upon in isolation. Our findings could suggest that HPV16 and p16 status may be independent predictors for prognosis and disease recurrence.
96

Awareness, Knowledge and Attitudes about Human Papilloma Virus among Female tertiary students in South Africa

Chikandiwa, Admire Takuranenhamo January 2010 (has links)
Magister Public Health - MPH / The study aimed to describe the knowledge and awareness of HPV infection and vaccine of female university students and to determine the predictors of vaccine acceptability. The study found that 70% of the participants were sexually active. Awareness and knowledge on HPV/vaccine were poor; with only 22% being aware of HPV and that a HPV vaccine was available in South Africa. A greater proportion (80%) reported willingness to be vaccinated. Being aware of the existence of a pap smear, higher knowledge about HPV, higher perceived vaccine effectiveness and higher perceived severity of HPV infection were significantly associated with increased willingness to be vaccinated. / South Africa
97

Improving Human Papillomavirus Vaccination Rates Through Evidence-Based Interventions

Thompson, Deidra 01 January 2018 (has links)
Cervical cancer is the most common human papilloma virus (HPV) -associated cancer and is the second leading cause of death in the world. Vaccination against HPV is essential to reduce the incidence of HPV and subsequent morbidity and mortality. According to the Centers for Disease Control and Prevention (CDC), approximately 79 million Americans are currently infected with HPV. The site for this DNP project was a 163-bed facility with inpatient and outpatient services in the southern United States. The vaccination rate at the site was 48%. The facility lacked educational interventions to prepare and remind providers to offer HPV vaccine. The purpose of this DNP project was to address a significant gap by increasing clinician knowledge through the development of educational materials, the design and implementation of training sessions for staff, and the development of protocols that require providers to offer the vaccine to every eligible patient and to call the patient and remind them of appointments for vaccine injections. The academic center for evidence-based practice star model was used to translate knowledge into nursing practice to improve outcomes change. For this project, a panel of 10 experts from the facility was formed to conduct a formative and summative evaluation of the educational materials and protocols. The findings of the study showed an acceptance of the plan suggesting the importance of the educational materials and the educational process to increase HPV vaccination rates, which can thereby reduce death and disease associated with HPV through the empowerment of the clinicians to provide necessary and appropriate care.
98

Investigation of the Interactions Between the DREAM Complex and HPV16

Ko, Kevin 01 January 2019 (has links)
According to the American Cancer Society, it has been estimated that in 2019 alone, there will be approximately 53,000 new cases of oropharyngeal cancers. Oropharyngeal cancers are the largest subset of head and neck squamous cell carcinomas (HNSCCs), which are the sixth most common cancer across worldwide populations. They, along with other HNSCCs, fall under a category of cancers known as Human papillomavirus (HPV)-associated cancers, and it has been found that upwards of 70% of these cancers can be attributed to high-risk HPV infections. Specifically, the high-risk HPV gene, E7, plays a key role in relieving cell cycle repression by disrupting the DREAM complex via competitive binding with p130, driving the cell cycle and cell proliferation. In order to combat this interaction, a LIN52-S20C mutation was developed, in hopes of reducing E7 binding of p130 and stabilizing the DREAM complex. We utilized human cervical cell lines, immortalized keratinocytes, and mouse fibroblasts, all of which contained the HPV16 genome, as models to observe the effects of the LIN52-S20C mutation on HPV-mediated hijacking of the cell cycle. Not only were we able to replicate the increased proliferation and upregulated DREAM gene expression in infected cells, but we were also able to observe some reversal of these effects in many of our cell models through the expression of the LIN52-S20C variant. The findings of these studies have been promising and provide a basis for future works, and we hope that the effects of the LIN52-S20C mutation can be translated into studies in in vivo models.
99

HPV Vaccination, Sociodemographic Variables, and Physician Recommendation in Select U.S. Areas

Jungbauer, Rebecca Marie 01 January 2017 (has links)
Human papillomavirus (HPV) is the most common sexually transmitted virus, and is causally related to several cancers. HPV vaccination rates are far below HealthyPeople 2020 targets and vary across geographic, socioeconomic, and demographic populations. The purpose of this research was to test the relationships among socioeconomic and demographic variables, HPV vaccination, social vulnerability, and physician recommendation within select local areas in the United States. Fundamental cause theory and behavioral economics informed this quantitative secondary analysis of National Immunization Survey-Teen and Social Vulnerability Index data (n = 43,271). Statistical analyses included chi-square and binomial logistic regression. Teens whose mothers had less than a college degree were more likely to initiate the HPV vaccine series (p < .01), while teens living in Hidalgo County and Houston were less likely to initiate the series (p < .001). Younger teens (p < .001), males (p < .001) and teens whose mothers had some college (p < .01) were less likely to complete the series, while older teens (p < .001) and teens living in Philadelphia and Houston (p < .01) were more likely to complete the series. Fewer teens in Bexar County received a physician recommendation (p < .01); there was no difference between vaccine initiation and select local area. These findings highlight the need to consider local sociodemographic influences on underlying disparities in health and physician behavior. Informed interventions may produce positive social change by reducing variance in health care quality, tailoring public health efforts to local needs, and moving persons experiencing disparities in health outcomes toward a healthy future.
100

Hispanic Parents' Perceptions of Human Papillomavirus Vaccination for Male Children

Dubuisson, Christy 01 January 2019 (has links)
Hispanic Americans experience a disparate burden of human papillomavirus vaccination (HPV)-related cancers. Despite vaccine availability, HPV vaccine uptake amid Hispanic American adolescent males in the United States is under the national goal. Furthermore, childhood vaccination compliance is driven by the parents; yet, there is little research on parents' perceptions of HPV vaccination of male children. The purpose of this phenomenological study was to explore the attitudes, beliefs, concerns, and decision- making factors of Hispanic American parents of male children aged 11- to 13- years-old surrounding HPV vaccination. The health belief model provided the framework for the study. Face-to-face interviews were conducted with 12 participants in a rural county in Colorado in which Hispanic Americans had a higher rate of reportable sexually transmitted infections than non-Hispanics. Data analysis included descriptive coding to summarize and synthesize the interview results. The results showed Hispanic parents had a positive attitude toward HPV vaccination, and parents believed that the vaccination would protect their child. Most of the parents were aware of the HPV vaccine. The parents believed in healthcare providers and would accept the vaccine if it was recommended by them. Despite several parents having concerns about HPV vaccinations, they still claimed they would vaccinate their child. The findings from the study can be used to inform educational offerings regarding HPV vaccination for Hispanic American boys.

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