Producción Científica UPeU

URI permanente para esta comunidadhttps://cris.upeu.edu.pe/handle/123456789/1

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    Identification and quantification of components in extracts of Uncaria tomentosa by HPLC-ES/MS.
    (2004)
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    Carbone, V
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    Quiroz, J de Dioz Zuniga
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    De Simone, F
    ;
    Pizza, C
    The two main classes of secondary metabolites, alkaloids and quinovic acid glycosides, of Uncaria tomentosa (Willd.) DC. (Rubiaceae), a Peruvian plant commonly known as 'uña de gato', have been analysed. Separation of the alkaloidal fraction was achieved using a solid phase extraction method based on cationic exchange, and an analytical method employing HPLC-ES/MS has been developed. Quantitative data for commercial wild bark, cultivated bark and leaves are reported. The analysis of quinovic acid glycosides was performed directly on the crude extract using both a fast analytical method based on flow injection ES/MS, and a more complete analytical technique using HPLC-MS.
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    Status of the neuromyelitis optica spectrum disorder in Latin America
    (2021-06-15)
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    Fernando Hamuy
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    Verónica Rivas
    ;
    Fernando Gracia
    ;
    Juan Ignacio Rojas
  • Publicacion
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    A case of monkeypox and cytomegalovirus coinfection manifesting with crusted lesions mimicking rupiod syphilis
    (2023-11-03)
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    Jhoann Aurich
    ;
    José Quiroz
    Human monkeypox is a viral zoonosis that has recently emerged worldwide. Clinical cutaneous features include papules, vesicles, and pustules. However, atypical manifestations mimicking other infectious diseases are being reported more frequently. We present a 41-year-old man patient with untreated HIV with generalized rupioid crusted ulcerated plaques with perineal ulceration that were found to represent monkeypox and cytomegalovirus infections.
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    Simultaneous onset of acute myocardial infarction, bicuspid aortic stenosis, and cardiac transthyretin amyloidosis—A clinically complex confluence
    (2024-01-01)
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    Paol Rojas
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    Roberto Baltodano‐Arellano
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    Angela Cachicatari
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    Jose A. Quiroz
    The coexistence of bicuspid aortic valve disease and coronary artery disease is well-established, but the identification of cardiac amyloidosis in this population has surged with advancing imaging techniques, introducing complexities in patient management. This case report emphasizes the pivotal role of multimodality imaging in accurately diagnosing three concurrent pathologies.
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    Novel Biomarkers for the diagnosis of diabetic nephropathy.
    (2024-01-01)
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    Juan Carlos Quiroz
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    Jacsel Suárez
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    José Enrique López Paz
    ;
    Pela J Roseboom
    Diabetes mellitus and its complications are a known public health problem nowadays. Diabetic nephropathy is one of the main complications and the result of multiple mechanisms, including: activation of the renin-angiotensin-aldosterone system, formation of advanced glycation end products and chronic inflammation that led to glomerular and tubulo-interstitial damage producing mesangial expansion and glomerulosclerosis, which finally results in chronic kidney disease. Early detection of diabetic nephropathy is essential for adequate intervention to stop, or at least slow down its progression. Multiple markers have been described, not only the classic ones such as serum creatinine, urea, and albuminuria, but at this point also novel biomarkers such as neutrophil gelatinase-associated lipocalin, tumor necrosis factor 1 receptor and monocyte chemoattractant protein-1, among others. The aim of this article was to provide an update review of the role of biomarkers in the diagnosis of diabetic nephropathy.
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    Workload and quality of life in Peruvian university professors
    (2024-01-01)
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    Claudia Melissa Mamani Poma
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    Jeyzi Sarai Mamani Churayra
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    Universidad Peruana Unión, Lima, Peru
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    Introduction: The quality of life of professors is an important standard for their job performance. Objective: To determine the influence of workload on the quality of life of professors at a Peruvian university. Materials and Methods: This was a study with a quantitative, explanatory, cross-sectional approach applied to 326 active employees and professors at a Peruvian university during the years 2023 and 2024. Two questionnaires validated in Peru were administered. The questionnaires asked about sociodemographic data, SF-36 quality of life, and the workload scale. The data were analyzed using Studio R software, correlation analysis with Pearson R, and the explanatory model with linear regression methods. Results: It was found that, in the workload, an average of 11.56 was obtained, which shows a workload with low distribution among professors. Discussion: It was found that there is a positive and moderate correlation between workload and four dimensions of quality of life, which are physical role, bodily pain, emotional role, and social functioning; it was observed that these are significant predictors of workload. Conclusion: It is concluded that workload and quality of life influence each other. However, no relationship was found between the variables; important specific correlations were identified between workload and three dimensions of quality of life (emotional role, bodily pain, and social functioning).
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    Proceso de enseñanza – aprendizaje en modalidad virtual y los estresores en las prácticas clínicas
    (2025-06-30)
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    Samuel Esau Quispe Taipe
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    La pandemia por la COVID-19 obligó a migrar la educación presencial a la virtual, generando nuevos desafíos para los estudiantes de enfermería, quienes enfrentaron altos niveles de estrés durante sus prácticas clínicas. Objetivo: Determinar la relación entre el proceso de enseñanza-aprendizaje en modalidad virtual y los estresores en las prácticas clínicas en estudiantes de enfermería peruanos. Metodología: Estudio cuantitativo, no experimental, correlacional y de corte transversal, con una muestra de 350 estudiantes. Resultados: No se hallaron diferencias significativas entre las variables principales; sin embargo, se identificaron correlaciones relevantes entre dimensiones específicas del proceso de enseñanza virtual, como el acompañamiento y la colaboración, con factores de estrés como la impotencia e incertidumbre. Conclusión: Ciertas dimensiones del entorno virtual influyen en la percepción de estresores durante las prácticas clínicas, lo cual sugiere la necesidad de fortalecer el soporte académico en entornos no presenciales.
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    Mitochondrial genome of the Peruvian scallop<i>Argopecten purpuratus</i>(Bivalvia: Pectinidae)
    (2014-01-07)
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    R. Alfaro
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    Takafumi Fujimoto
    ;
    Katsutoshi Arai
    The mitochondrial genome of the Peruvian scallop Argopecten purpuratus was determined. The length of the mitochondrial coding region is 15,608 bp. A typical bivalve mitochondrial composition was detected with 12 protein-coding genes, 2 ribosomal RNA genes and 21 transfer RNA genes, with the absence of the atp8 gene. Fifty percent of the protein-coding genes use typical ATG start codon, whereas five genes utilize ATA as their start codon. Only one gene was found to utilize TTG as its start codon. The A. purpuratus mitogenome shows a significant similarity to that of A. irradians irradians, in length as well as in gene composition.
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    A glimpse into the genetic diversity of the Peruvian seafood sector: Unveiling species substitution, mislabeling and trade of threatened species
    (2018-11-16)
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    José Serna
    ;
    Christian Robles
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    Beder Ramírez
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    Lorenzo E. Reyes‐Flores
    Peru is one of the world's leading fishing nations and its seafood industry relies on the trade of a vast variety of aquatic resources, playing a key role in the country's socio-economic development. DNA barcoding has become of paramount importance for systematics, conservation, and seafood traceability, complementing or even surpassing conventional identification methods when target organisms show similar morphology during the early life stages, have recently diverged, or have undergone processing. Aiming to increase our knowledge of the species diversity available across the Peruvian supply chain (from fish landing sites to markets and restaurants), we applied full and mini-barcoding approaches targeting three mitochondrial genes (COI, 16S, and 12S) and the control region to identify samples purchased at retailers from six departments along the north-central Peruvian coast. DNA barcodes from 131 samples were assigned to 55 species (plus five genus-level taxa) comprising 47 families, 24 orders, and six classes including Actinopterygii (45.03%), Chondrichthyes (36.64%), Bivalvia (6.87%), Cephalopoda (6.11%), Malacostraca (3.82%), and Gastropoda (1.53%). The identified samples included commercially important pelagic (anchovy, bonito, dolphinfish) and demersal (hake, smooth-hound, Peruvian rock seabass, croaker) fish species. Our results unveiled the marketing of protected and threatened species such as whale shark, Atlantic white marlin, smooth hammerhead (some specimens collected during closed season), shortfin mako, and pelagic thresher sharks. A total of 35 samples (26.72%) were mislabeled, including tilapia labeled as wild marine fish, dolphinfish and hake labeled as grouper, and different shark species sold as "smooth-hounds". The present study highlights the necessity of implementing traceability and monitoring programs along the entire seafood supply chain using molecular tools to enhance sustainability efforts and ensure consumer choice.
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    Sexual Behavior and Sexually Transmitted Infection Outcomes Among Men Who Have Sex With Men and Transgender Women Participating in a Study of the Timing of Antiretroviral Therapy in Lima, Peru
    (2020-11-11)
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    Ricardo Alfaro
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    Tara Ness
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    Carmela Ganoza
    ;
    Pedro Gonzáles
    BACKGROUND: We assessed sexual behavior and incidence of sexually transmitted infections (STIs) among men who have sex with men and transgender women participating in Sabes, a study of an expanded treatment as prevention strategy focused on early diagnosis and treatment of HIV infection in Lima, Peru (2013-2017). METHODS: Sabes participants were tested monthly for HIV to identify acute or early infections, and HIV-positive participants were randomized to receive antiretroviral therapy immediately (immediate arm) or after 24 weeks (deferred arm) during a 48-week follow-up period. Sexual behavior was assessed at randomization (baseline) and every 12 weeks thereafter. Participants were tested for urethral and rectal chlamydia and gonorrhea and for syphilis at baseline, 12, 24, and 48 weeks. We describe patterns of sexual behavior during the 48-week follow-up period and compare sexual behavior and STI incidence between study arms. RESULTS: After randomization, 207 HIV-positive participants completed questionnaires and STI testing at 2 or more visits. After HIV diagnosis, participants in both arms reported increases in condom use with main and casual partners and decreased drug and alcohol use before or during anal sex. We observed no between-arm differences in sexual behavior. Deferred arm participants had higher incidence of chlamydia (incidence rate ratio, 2.33; 95% confidence interval, 1.14-4.77) but not gonorrhea or syphilis. CONCLUSIONS: Despite reported increases in condom use, the overall high incidence of STIs reflects some ongoing condomless sex among HIV-positive men who have sex with men and transgender women, highlighting the importance of regular STI screening and counseling to support consistent condom use among HIV-positive individuals at risk for STIs.