Propiedades y usos del propóleo en odontología: una revisión

El propóleo es un material pegajoso de color oscuro obtenido de diversas plantas y mezclado con cera, deriva de las abejas quienes lo utilizan para proteger las colmenas. El objetivo del presente trabajo fue realizar una revisión bibliográfica acerca de las propiedades y usos del propóleo en odontología. Se realizó una búsqueda bibliográfica de reportes publicados de marzo del 2010 a marzo del 2020 en PubMed, Imbiomed, Medigraphic, SciELO y Google Scholar usando las palabras: propóleo, propiedades, usos. Se seleccionaron 39 artículos para la revisión. Las principales propiedades reportadas fueron: antimicrobiana, antiinflamatoria, inmunomodulador y cicatrizante. Los principales usos reportados abarcaron las siguientes áreas de la odontología: prevención de caries, endodoncia, periodoncia, prostodoncia y cirugía. En los últimos años, se ha puesto especial atención a las aplicaciones del propóleo ya que se ha demostrado su eficacia en distintas áreas de la odontología

Cabbage and fermented vegetables : From death rate heterogeneity in countries to candidates for mitigation strategies of severe COVID-19

Large differences in COVID-19 death rates exist between countries and between regions of the same country. Some very low death rate countries such as Eastern Asia, Central Europe, or the Balkans have a common feature of eating large quantities of fermented foods. Although biases exist when examining ecological studies, fermented vegetables or cabbage have been associated with low death rates in European countries. SARS-CoV-2 binds to its receptor, the angiotensin-converting enzyme 2 (ACE2). As a result of SARS-CoV-2 binding, ACE2 downregulation enhances the angiotensin II receptor type 1 (AT(1)R) axis associated with oxidative stress. This leads to insulin resistance as well as lung and endothelial damage, two severe outcomes of COVID-19. The nuclear factor (erythroid-derived 2)-like 2 (Nrf2) is the most potent antioxidant in humans and can block in particular the AT(1)R axis. Cabbage contains precursors of sulforaphane, the most active natural activator of Nrf2. Fermented vegetables contain many lactobacilli, which are also potent Nrf2 activators. Three examples are: kimchi in Korea, westernized foods, and the slum paradox. It is proposed that fermented cabbage is a proof-of-concept of dietary manipulations that may enhance Nrf2-associated antioxidant effects, helpful in mitigating COVID-19 severity.Peer reviewe

Nrf2-interacting nutrients and COVID-19 : time for research to develop adaptation strategies

There are large between- and within-country variations in COVID-19 death rates. Some very low death rate settings such as Eastern Asia, Central Europe, the Balkans and Africa have a common feature of eating large quantities of fermented foods whose intake is associated with the activation of the Nrf2 (Nuclear factor (erythroid-derived 2)-like 2) anti-oxidant transcription factor. There are many Nrf2-interacting nutrients (berberine, curcumin, epigallocatechin gallate, genistein, quercetin, resveratrol, sulforaphane) that all act similarly to reduce insulin resistance, endothelial damage, lung injury and cytokine storm. They also act on the same mechanisms (mTOR: Mammalian target of rapamycin, PPAR gamma:Peroxisome proliferator-activated receptor, NF kappa B: Nuclear factor kappa B, ERK: Extracellular signal-regulated kinases and eIF2 alpha:Elongation initiation factor 2 alpha). They may as a result be important in mitigating the severity of COVID-19, acting through the endoplasmic reticulum stress or ACE-Angiotensin-II-AT(1)R axis (AT(1)R) pathway. Many Nrf2-interacting nutrients are also interacting with TRPA1 and/or TRPV1. Interestingly, geographical areas with very low COVID-19 mortality are those with the lowest prevalence of obesity (Sub-Saharan Africa and Asia). It is tempting to propose that Nrf2-interacting foods and nutrients can re-balance insulin resistance and have a significant effect on COVID-19 severity. It is therefore possible that the intake of these foods may restore an optimal natural balance for the Nrf2 pathway and may be of interest in the mitigation of COVID-19 severity

Propiedades y usos del propóleo en odontología: una revisión

El propóleo es un material pegajoso de color oscuro obtenido de diversas plantas y mezclado con cera, deriva de las abejas quienes lo utilizan para proteger las colmenas. El objetivo del presente trabajo fue realizar una revisión bibliográfica acerca de las propiedades y usos del propóleo en odontología. Se realizó una búsqueda bibliográfica de reportes publicados de marzo del 2010 a marzo del 2020 en PubMed, Imbiomed, Medigraphic, SciELO y Google Scholar usando las palabras: propóleo, propiedades, usos. Se seleccionaron 39 artículos para la revisión. Las principales propiedades reportadas fueron: antimicrobiana, antiinflamatoria, inmunomodulador y cicatrizante. Los principales usos reportados abarcaron las siguientes áreas de la odontología: prevención de caries, endodoncia, periodoncia, prostodoncia y cirugía. En los últimos años, se ha puesto especial atención a las aplicaciones del propóleo ya que se ha demostrado su eficacia en distintas áreas de la odontología

Contribution of Topical Antioxidants to Maintain Healthy Skin—A Review

The skin is constantly exposed to various environmental stresses, in particular to the damage caused by pollution and ultraviolet radiation (UV), and as a consequence, the horny extract can be negatively impacted by the harmful influence of some of its surface components. The mechanisms involved in the degradation processes promoted by UV radiation are driven by the direct absorption of radiation via cellular chromophores, the formation of excited states and the consequent chemical reactions, or even by the photosensitization mechanisms, in which UV light is absorbed by the sensitizers that are excited and their reactions promote the formation of reactive oxygen species (ROS). The mechanisms of polluting agents are not yet fully understood, however, they indicate that one of the main mechanisms involved is oxidative stress by lipid peroxidation, with the ability to promote damage to the composition of sebum, the quality of the stratum corneum and also, promote aging skin. Recent studies demonstrate the potential of antioxidant agents, with an emphasis on products of natural origin, which try to promote the maintenance of the physiological balance of the skin