Marisela Yepez - Academia.edu (original) (raw)
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Papers by Marisela Yepez
MedEdPublish, 2022
Background: Mentorship is a necessary component for young students to pursue a career in medicine... more Background: Mentorship is a necessary component for young students to pursue a career in medicine. In medically underserved areas, mentorship can be sparse due to the lack of access to healthcare professionals. The purpose of this project was to gain an understanding of the mentorship received by practicing medical students. Methods: The authors conducted structured, one-on-one interviews with 10 current medical students about their perceptions and experiences with mentorship. Interviews were transcribed, coded, and analyzed for themes and subthemes. Results: Our findings revolve around three time periods of mentorship: 1) Before Obtaining a Mentor; 2) During the Mentorship; and 3) After the Mentorship. In our findings we describe key characteristics such as professional development, personal qualities of the mentor, and professional and personal guidance as important components in guiding the mentee starting from the undergraduate level and continuing to their current level of edu...
Annals of the New York Academy of Sciences, 2006
Prolonged heroin abuse has been associated with neurotoxicity. Thus, the involvement of nitric ox... more Prolonged heroin abuse has been associated with neurotoxicity. Thus, the involvement of nitric oxide (NO) in heroin-induced dopaminergic neurotoxicity could be a reasonable explanation for heroin-induced changes in brain. Enzymatically derived NO has been implicated in numerous physiological and pathological processes in the brain. Whereas during development NO participates in growing and maturation processes, excess NO production in the adult in response to inflammation, injury, or trauma, participates in both cell death and repair. The expression and activity of the inducible isoform of NO synthase (iNOS) play a pivotal role in sustained and elevated NO release. Recent evidence suggests that neurons can respond to proinflammatory stimuli and take part in brain inflammation. The effect of heroin abuse on platelet NO production and on expression of iNOS in drug addicts submitted to an ultrarapid detoxification was studied. The NO production was estimated from the nitrite concentration, and nitric oxide synthase was determined by Western blotting analysis. Results showed no difference in nitrite content of resting platelets between heroin abuser and control groups. However, after platelet stimulation, heroin abusers showed significantly lower nitrite values. The Western blotting analysis reinforced these results. After ultrarapid detoxification, platelet nitrite production in heroin abusers showed no differences compared to control subjects. Our results suggest that heroin consumption decreases the iNOS synthase expression and platelet NO production. Detoxification treatment restores these changes.
MedEdPublish, 2022
Background: Mentorship is a necessary component for young students to pursue a career in medicine... more Background: Mentorship is a necessary component for young students to pursue a career in medicine. In medically underserved areas, mentorship can be sparse due to the lack of access to healthcare professionals. The purpose of this project was to gain an understanding of the mentorship received by practicing medical students. Methods: The authors conducted structured, one-on-one interviews with 10 current medical students about their perceptions and experiences with mentorship. Interviews were transcribed, coded, and analyzed for themes and subthemes. Results: Our findings revolve around three time periods of mentorship: 1) Before Obtaining a Mentor; 2) During the Mentorship; and 3) After the Mentorship. In our findings we describe key characteristics such as professional development, personal qualities of the mentor, and professional and personal guidance as important components in guiding the mentee starting from the undergraduate level and continuing to their current level of edu...
Annals of the New York Academy of Sciences, 2006
Prolonged heroin abuse has been associated with neurotoxicity. Thus, the involvement of nitric ox... more Prolonged heroin abuse has been associated with neurotoxicity. Thus, the involvement of nitric oxide (NO) in heroin-induced dopaminergic neurotoxicity could be a reasonable explanation for heroin-induced changes in brain. Enzymatically derived NO has been implicated in numerous physiological and pathological processes in the brain. Whereas during development NO participates in growing and maturation processes, excess NO production in the adult in response to inflammation, injury, or trauma, participates in both cell death and repair. The expression and activity of the inducible isoform of NO synthase (iNOS) play a pivotal role in sustained and elevated NO release. Recent evidence suggests that neurons can respond to proinflammatory stimuli and take part in brain inflammation. The effect of heroin abuse on platelet NO production and on expression of iNOS in drug addicts submitted to an ultrarapid detoxification was studied. The NO production was estimated from the nitrite concentration, and nitric oxide synthase was determined by Western blotting analysis. Results showed no difference in nitrite content of resting platelets between heroin abuser and control groups. However, after platelet stimulation, heroin abusers showed significantly lower nitrite values. The Western blotting analysis reinforced these results. After ultrarapid detoxification, platelet nitrite production in heroin abusers showed no differences compared to control subjects. Our results suggest that heroin consumption decreases the iNOS synthase expression and platelet NO production. Detoxification treatment restores these changes.