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    Effects of a High-Fat Diet and Docosahexaenoic Acid during Pregnancy on Fatty Acid Composition in the Fetal Livers of Mice
    (2023)
    Daniela Álvarez
    ;
    Macarena Ortiz
    ;
    Gabriel Valdebenito
    ;
    Nicolás Crisosto
    ;
    Bárbara Echiburú
    <jats:p>A high-fat diet (HFD) during pregnancy promotes fat accumulation and reduces docosahexaenoic acid (DHA) levels in the liver of the offspring at postnatal ages, which can depend on fetal sex. However, the prenatal mechanisms behind these associations are still unclear. Thus, we analyzed if an HFD alters DHA content and the expression of molecules related to fatty acid (FA) metabolism in the fetal liver. Female C57BL/6 mice were fed a control diet or HFD for 4–6 weeks before pregnancy until the gestational day (GD) 17.5. A subgroup of each diet received DHA (100 mg/Kg) orally from GD 6.5 until 16.5. On GD 17.5, maternal livers, placentas, and livers from male and female fetuses were collected for FA profiling with gas-chromatography and gene expression of molecules related to FA metabolism using qPCR. PPAR-α protein expression was evaluated using Western blot. The gene expression of placental FA transporters was also assessed. An HFD increased eicosapentaenoic acid (EPA) and decreased DHA levels and protein expression of PPAR-α in the fetal livers of both sexes. DHA increased the gene expression of Ppara, Cpt1, and Acsl1 in the livers of female fetuses. Therefore, an HFD reduces DHA levels and PPAR-α, a master regulator of gene expression, in the fetal liver. In turn, the livers of female fetuses seem to be more sensitive to DHA action.</jats:p>
    Scopus© Citations 2
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    Association between maternal obesity, essential fatty acids and biomarkers of fetal liver function
    (2023)
    Macarena Ortiz
    ;
    Francisca Sánchez
    ;
    Daniela Álvarez
    ;
    Cristian Flores
    ;
    Francisca Salas-Pérez
      7Scopus© Citations 5
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    Annona cherimola Seed Extracts Trigger an Early Apoptosis Response and Selective Anticlonogenic Activity against the Human Gastric Carcinoma Cell Line SNU-1
    (2023)
    Johan Macuer-Guzmán
    ;
    Claudia Giovagnoli-Vicuña
    ;
    Giuliano Bernal
    ;
    Lorena Lobos-González
    ;
    Erwin de la Fuente-Ortega
    <jats:p>The aim of this study was to evaluate, for the first time, the antiproliferative, apoptotic and diminishing effects of the anchored growth-independent capacity of an ethanol macerate extract from the Annona cherimola seed (EMCHS) in the human gastric cancer cell line SNU-1. The cells treated with EMCHS (20 μg/mL) significantly reduced the capacity to form clones of the tumor cell. Moreover, 50 μg/mL of EMCHS extract induced apoptosis, as was shown by the Annexin-V assay. UHPLC-MS/MS analysis detected two acetogenins (Annonacinone and Annonacin) in the EMCHS, which could be largely responsible for its selective antiproliferative effect. The identification of fatty acids by GC-FID showed the presence of eight fatty acids, among which was, oleic acid, which has recognized activity as an adjuvant in antitumor treatments. Taken together, our results indicate that the EMCHS seems promising for use as a natural therapy against gastric cancer disease.</jats:p>
      3
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    Type I collagen hydrogels as a delivery matrix for royal jelly derived extracellular vesicles
    (2020)
    Orlando J. Ramírez
    ;
    Simón Alvarez
    ;
    Pamina Contreras-Kallens
    ;
    Nelson P. Barrera
    ;
    Sebastian Aguayo
      7Scopus© Citations 44
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    Linking social preferences and ocean acidification impacts in mussel aquaculture
    (2019)
    Valeska A. San Martin
    ;
    Stefan Gelcich
    ;
    VÁSQUEZ LAVÍN , FELIPE ANTONIO  
    ;
    PONCE OLIVA, ROBERTO DANIEL  
    ;
    José I. Hernández
    <jats:title>Abstract</jats:title><jats:p>Ocean Acidification (OA) has become one of the most studied global stressors in marine science during the last fifteen years. Despite the variety of studies on the biological effects of OA with marine commercial species, estimations of these impacts over consumers’ preferences have not been studied in detail, compromising our ability to undertake an assessment of market and economic impacts resulting from OA at local scales. Here, we use a novel and interdisciplinary approach to fill this gap. We experimentally test the impact of OA on commercially relevant physical and nutritional attributes of mussels, and then we use economic discrete choice models to assess the marginal effects of these impacts over consumers’ preferences and wellbeing. Results showed that attributes, which were significantly affected by OA, are also those preferred by consumers. Consumers are willing to pay on average 52% less for mussels with evidences of OA and are willing to increase the price they pay to avoid negative changes in attributes due to OA. The interdisciplinary approach developed here, complements research conducted on OA by effectively informing how OA economic impacts can be analyzed under the lens of marginal changes in market price and consumer’ welfare. Thereby, linking global phenomena to consumers’ wellbeing, and shifting the focus of OA impacts to assess the effects of local vulnerabilities in a wider context of people and businesses.</jats:p>
      25  1Scopus© Citations 27
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    Exosome-like vesicles in Apis mellifera bee pollen, honey and royal jelly contribute to their antibacterial and pro-regenerative activity
    (2019)
    Christina M. A. P. Schuh
    ;
    Sebastian Aguayo
    ;
    Gabriela Zavala
    ;
    Maroun Khoury
    <jats:p>Microvesicles have become key players in cellular communication. Since glandular secretions present a rich source of active exosomes, we hypothesized that exosome-like vesicles are present in Apis mellifera hypopharyngeal gland secretomal products (honey, royal jelly and bee pollen), and participate in their known antibacterial and pro-regenerative effects. We developed an isolation protocol based on serial- and ultracentrifugation steps and demonstrated the presence of protein-containing exosome-like vesicles in all three bee-derived products. Assessing their antibacterial properties, we found that exosome-like vesicles had bacteriostatic, bactericidal and biofilm-inhibiting effects on Staphylococcus aureus. Furthermore, we could demonstrate that mesenchymal stem cells (MSCs) internalize bee-derived exosome-like vesicles and that these vesicles influence their migration potential. In an in vitro wound healing assay, honey and royal jelly exosome-like vesicles increased migration of human MSC, demonstrating their interkingdom activity. Summarizing, we have discovered exosome-like vesicles as a new, active compound in bee pollen, honey and royal jelly.</jats:p>
    Scopus© Citations 49  1