1
tesis de maestría
Publicado 2017
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Se evaluó la capacidad antigénica de cinco proteínas recombinantes (Catepsina-L, Enolasa, Multiepitópica 1, Tripsina, Tetraspanina 7) expresadas en el sistema procariótico Escherichia coli BL21 (DE3) pLys; estos antígenos pertenecen al sistema excreción y secreción (E/S) de las oncósferas de Taenia solium a excepción de Multiepitópica 1 que es una proteína diseñada in silico a partir de proteínas de alta exposición cuya secuencia fue sintetizada posteriormente. Se evaluó su potencial uso en el inmunodiagnóstico de cisticercosis porcina y humana mediante un ensayo de ELISA indirecto. Para el inmunodiagnóstico con sueros de cerdo, se estandarizó correctamente el ensayo de ELISA convencional mediante el tablero de titulación, utilizando cada uno de los antígenos con sueros de cerdos controles e infectados. El ensayo de ELISA con sueros individuales mostró alta sensibil...
2
artículo
Publicado 2017
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El deterioro cognitivo inducido por quimioterapia es un proceso biológico poco entendido; sin embargo, existe evidencia de que podría afectar a pacientes en tratamiento adyuvante por cáncer de mama cuya incidencia varía ampliamente según la población en estudio, el esquema terapéutico aplicado y la metodología utilizada en su evaluación. La presente revisión busca iniciar discusiones sobre la necesidad de generar información en nuestro medio acerca de este trastorno, a fin de plantear estrategias de prevención y control por parte del personal de salud y mejorar la calidad de vida de las pacientes sometidas a este tipo de tratamiento.
3
artículo
Publicado 2022
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Objective: Various studies on Hodgkin’s lymphoma (HL) have determined programmed death-ligand 1 (PD-L1) expression in Hodgkin and Reed-Sternberg (HRS) cells, with variable results. This protein has gained relevance for its role in theimmune response in malignant neoplasms. This work aimed to determine PD-L1 immunohistochemical expression in HRS cells and its relationship with age, sex, clinical stage and overall survival (OS) in a cohort of Peruvian patients. Materials and methods: Twenty-five (25) biopsies from patients diagnosed with HL were assessed, which allowed determining PD-L1 immunohistochemical expression in HRS cells in relation to OS and clinical data of the patients. Results: All cases showed PD-L1 expression in more than 1 % of tumor cells. There was no statistically significant difference in OS when two groups were compared in terms of PD-L1 expression with a cut-off poi...
4
artículo
Publicado 2020
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We sought to review literature on the prevalence of symptoms of depression in women with a diagnosis of breast cancer (BC) and in the Peruvian population determine the prevalence of symptoms of depression and to describe the association with sociodemographic characteristics. Descriptive cross-sectional analytical study of 254 patients from the National Cancer Institute of Peru (Instituto Nacional de Enfermedades Neoplasicas) with a diagnosis of clinical stage I or II BC. The patients included women aged between 26 and 67 years old. Symptoms of depression were monitored by the Beck Depression Inventory-II. Moreover, clinical features and patient sociodemographic characteristics were analyzed and their association with depression was assessed by logistic regression. The average age of the patients was 47.8 +/- 9.2 years; 5.4% of the patients were postmenopausal at the time of the questionn...
5
artículo
Publicado 2019
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A heterozygosity loss of 1p/19q has clinical prognostic value and is strongly associated with classical histologic features of oligodendroglioma. Objectives: The present article proposes a molecular method to determine the loss of heterozygosity (LOH) for 1p/19q and to allow the classification of oligodendroglial tumors. Material and Methods: Fresh samples from the National Institute of Neoplastic Diseases Tumor BioBank and paraffin-embedded tissue biopsies of oligodendroglial tumors with pathological diagnosis of oligodendroglioma and oligoastrocytoma were used. The proposed methods are Multiplex PCR and amplification of fragments by capillary electrophoresis of PCR products, and were applied to a total of 39 cases which presented histological grade II and III. Results: The results obtained allow an adequate molecular classification of oligodendroglial tumors.
6
artículo
Publicado 2022
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Objective. The aim of this study was to determine the relationship between anemia and depressive symptoms in patients with early stage breast cancer at the National Institute of Neoplastic Diseases (INEN), Lima, Peru. Methods. An analytical cross-sectional observational study of 60 Peruvian women diagnosed with early stage I and II breast cancer was conducted between June 2019 and March 2020. All participants were assessed by Beck Depression Inventory-II (BDIII) score, had not received prior chemotherapy, and met the inclusion criteria. Each participant provided a blood sample that was used to estimate hemoglobin and red and white blood cell counts. Results. Of the 60 patients who met the inclusion criteria, twenty (33.3%) had depressive symptoms at the time of diagnosis. Mean hemoglobin levels in patients with depressive symptoms (M = 10.9, SD = 2.1) were lower compared to those in pa...
7
artículo
Publicado 2022
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Background: Breast cancer incidence in the United States is lower in Hispanic/Latina (H/L) compared with African American/ Black or Non-Hispanic White women. An Indigenous American breast cancer-protective germline variant (rs140068132) has been reported near the estrogen receptor 1 gene. This study tests the association of rs140068132 and other polymorphisms in the 6q25 region with subtype-specific breast cancer risk in H/Ls of high Indigenous American ancestry. Methods: Genotypes were obtained for 5,094 Peruvian women with (1,755) and without (3,337) breast cancer. Associations between genotype and overall and subtype-specific risk for the protective variant were tested using logistic regression models and conditional analyses, including other risk-associated polymorphisms in the region. Results: We replicated the reported association between rs140068132 and breast cancer risk overall ...
8
Publicado 2025
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A substantial portion of the genetic predisposition for breast cancer is explained by multiple common genetic variants of relatively small effect. A subset of these variants, which have been identified mostly in individuals of European (EUR) and Asian ancestries, have been combined to construct a polygenic risk score (PRS) to predict breast cancer risk, but the prediction accuracy of existing PRSs in Hispanic/Latinx individuals (H/L) remain relatively low. We assessed the performance of several existing PRS panels with and without addition of H/L-specific variants among self-reported H/L women. PRS performance was evaluated using multivariable logistic regression and the area under the ROC curve. Both EUR and Asian PRSs performed worse in H/L samples compared with original reports. The best EUR PRS performed better than the best Asian PRS in pooled H/L samples. EUR PRSs had decreased per...
