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1.
MMWR Morb Mortal Wkly Rep ; 71(38): 1220-1221, 2022 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-36136958

RESUMO

In August 2022, the Florida Department of Health (FDOH) was notified of a suspected case of monkeypox in an infant aged <2 months who was admitted to a Florida hospital with a rash and cellulitis. This case report highlights findings from the related epidemiologic investigation and describes the public health actions taken. This activity was reviewed by CDC and was conducted consistent with applicable federal law and CDC policy.* This is the youngest patient with confirmed monkeypox infection in Florida to date.


Assuntos
Exantema , Mpox , Florida/epidemiologia , Humanos , Lactente , Saúde Pública
2.
Salud Publica Mex ; 64(3, may-jun): 241, 2022 Jun 02.
Artigo em Espanhol | MEDLINE | ID: mdl-36130372

RESUMO

No disponible.


Assuntos
COVID-19 , Feminino , Humanos , Mulheres
3.
Int J Mol Sci ; 23(20)2022 Oct 14.
Artigo em Inglês | MEDLINE | ID: mdl-36293182

RESUMO

A balanced and varied diet provides diverse beneficial effects on health, such as adequate micronutrient availability and a gut microbiome in homeostasis. Besides their participation in biochemical processes as cofactors and coenzymes, vitamins and minerals have an immunoregulatory function; meanwhile, gut microbiota and its metabolites coordinate directly and indirectly the cell response through the interaction with the host receptors. Malnourishment is a crucial risk factor for several pathologies, and its involvement during the Coronavirus Disease 2019 pandemic has been reported. This pandemic has caused a significant decline in the worldwide population, especially those with chronic diseases, reduced physical activity, and elder age. Diet and gut microbiota composition are probable causes for this susceptibility, and its supplementation can play a role in reestablishing microbial homeostasis and improving immunity response against Coronavirus Disease 2019 infection and recovery. This study reviews the role of micronutrients and microbiomes in the risk of infection, the severity of disease, and the Coronavirus Disease 2019 sequelae.


Assuntos
COVID-19 , Microbioma Gastrointestinal , Humanos , Idoso , Micronutrientes/farmacologia , Vitaminas/farmacologia , Coenzimas
4.
Nurs Res ; 70(5): 344-353, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33990120

RESUMO

BACKGROUND: Cultural background, language, and literacy are factors that may affect access, healthcare utilization, and cancer screening behaviors. OBJECTIVE: This study aimed to characterize health literacy among Spanish-preferring Hispanic/Latino individuals ages 50-75 and examine associations between sociodemographic characteristics, health beliefs, and health literacy. METHODS: Participants self-identified as Hispanic/Latino, preferring health information in Spanish, were ages 50-75 years old, at average risk for colorectal cancer (CRC), not up to date with CRC screening, and enrolled in a CRC screening education intervention trial. Sociodemographic characteristics, health beliefs, and health literacy (i.e., difficulty understanding written health information and confidence completing health forms) were assessed at baseline. Descriptive and logistic regression analyses were performed. RESULTS: Fifty-three percent of participants reported either sometimes having difficulty or always having difficulty with written health information, and 25% reported always asking for help or being not so confident in completing health forms. Univariate predictors of adequate health literacy for written health information were lower cancer worry and lower religious beliefs. Higher educational attainment predicted confidence in completing health forms. CONCLUSIONS: Findings highlight the need for interventions that address health beliefs and health literacy among Hispanic/Latino patients who have low confidence in completing written forms and difficulty understanding written information and reinforce the use of plain language and salient design features when developing patient education materials.


Assuntos
Barreiras de Comunicação , Letramento em Saúde/classificação , Hispânico ou Latino/estatística & dados numéricos , Idoso , Detecção Precoce de Câncer/métodos , Detecção Precoce de Câncer/normas , Detecção Precoce de Câncer/estatística & dados numéricos , Feminino , Florida , Letramento em Saúde/normas , Letramento em Saúde/estatística & dados numéricos , Hispânico ou Latino/psicologia , Humanos , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Inquéritos e Questionários
5.
Ethn Health ; 25(2): 206-221, 2020 02.
Artigo em Inglês | MEDLINE | ID: mdl-29319331

RESUMO

Objective: Colorectal cancer (CRC) screening efforts have effectively reduced CRC morbidity and mortality, yet screening remains relatively low among Latinos. The study's purpose was to document the awareness/knowledge of Fecal Immunochemical Test (FIT) among Latinos, gain better understanding of patient and health care provider perceptions about FIT, and explore the feasibility of adoption/uptake.Design/Methods: The study was guided by qualitative, ethnography design and methods. Eight focus groups (FG) with patients who self-identified as Hispanic/Latino between 50-75 years of age and key informant interviews with providers (N = 10) were conducted followed by a brief demographic questionnaire.Results: Awareness levels varied based on prior screening experiences among patients and providers. Both patients and providers believed the FIT is simple and easy to use; although, a minority of patients expressed doubts about the efficacy of the FIT when compared to colonoscopy.Conclusions: Despite the increasing acceptance of the FIT among the health care community, a significant lag time still exists among our study's populations. Study findings speak to novelty of the FIT test among underserved populations and the health disparity gap between health innovations/discoveries. Increased awareness and education efforts about the efficacy coupled with information about its accessibility, ease, and user instructions may increase the adoption of FIT.


Assuntos
Conscientização , Neoplasias Colorretais , Detecção Precoce de Câncer , Hispânico ou Latino , Sangue Oculto , Aceitação pelo Paciente de Cuidados de Saúde , Adulto , Antropologia Cultural , Neoplasias Colorretais/diagnóstico , Neoplasias Colorretais/prevenção & controle , Feminino , Grupos Focais , Pessoal de Saúde/psicologia , Pessoal de Saúde/estatística & dados numéricos , Hispânico ou Latino/psicologia , Hispânico ou Latino/estatística & dados numéricos , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários
6.
J Environ Manage ; 256: 109956, 2020 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-31818750

RESUMO

In this study, bone char (BC) from pleco fish (Pterygoplichthys spp.) was synthesized, and their textural and physicochemical properties, as well as its adsorption capacity towards fluoride and Cd(II) from single and binary aqueous solutions, were determined. The results showed that the properties of the BCs were independent of the type of bone used and the surface areas were close to 110 m2 g-1. The effect of solution pH revealed that the adsorption capacity of BC towards fluoride from water raised by decreasing the solution pH. This trend was attributed to the electrostatic interaction between the positively charged surface and the fluoride in aqueous solution. On the contrary, the capacity of BC for adsorbing Cd(II) was enhanced by increasing the solution pH, indicating that electrostatic interactions were also essential but with a contrary effect in comparison with fluoride adsorption due to the negatively charged surface at pH above the point zero charge (pHPZC = 8.16). The experimental data for binary adsorption of fluoride and Cd(II) were interpreted satisfactorily using the modified Freundlich multicomponent isotherm (EFMI), and the experimental data revealed that Cd(II) have an antagonistic effect on the adsorption of fluoride, whereas the presence of fluoride does not affect the capacity of BC for adsorbing Cd(II). Thermogravimetric, XRD diffraction and IR spectroscopy analysis corroborated that the adsorption of fluoride in BC is due to electrostatic attractions, ion exchange or chemisorption and physisorption. Besides, the removal of Cd(II) occurs by physical adsorption and ion exchange. It was concluded that BC is an alternative material for the removal of fluoride and Cd(II) from aqueous solutions, and it is a possible application for using the bones of this invasive fish species.


Assuntos
Poluentes Químicos da Água , Purificação da Água , Adsorção , Animais , Cádmio , Fluoretos , Concentração de Íons de Hidrogênio , Espécies Introduzidas , Cinética , Água
7.
Health Educ Res ; 34(3): 310-320, 2019 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-30929015

RESUMO

Despite established benefits, colorectal cancer (CRC) screening is underutilized among Latinos/Hispanics. We conducted a pilot 2-arm randomized controlled trial evaluating efficacy of two intervention conditions on CRC screening uptake among Latinos receiving care in community clinics. Participants (N = 76) were aged 50-75, most were foreign-born, preferred to receive their health information in Spanish, and not up-to-date with CRC screening. Participants were randomized to either a culturally linguistically targeted Spanish-language fotonovela booklet and DVD intervention plus fecal immunochemical test [FIT] (the LCARES, Latinos Colorectal Cancer Awareness, Research, Education and Screening intervention group); or a non-targeted intervention that included a standard Spanish-language booklet plus FIT (comparison group). Measures assessed socio-demographic variables, health literacy, CRC screening behavior, awareness and beliefs. Overall, FIT uptake was 87%, exceeding the National Colorectal Cancer Roundtable's goal of 80% by 2018. The LCARES intervention group had higher FIT uptake than did the comparison group (90% versus 83%), albeit not statistically significant (P = 0.379). The LCARES intervention group was associated with greater increases in CRC awareness (P = 0.046) and susceptibility (P = 0.013). In contrast, cancer worry increased more in the comparison group (P = 0.045). Providing educational materials and a FIT kit to Spanish-language preferring Latinos receiving care in community clinics is a promising strategy to bolster CRC screening uptake to meet national targets.


Assuntos
Neoplasias Colorretais/diagnóstico , Detecção Precoce de Câncer/métodos , Promoção da Saúde/organização & administração , Hispânico ou Latino , Provedores de Redes de Segurança/organização & administração , Idoso , Neoplasias Colorretais/etnologia , Competência Cultural , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Letramento em Saúde , Humanos , Idioma , Masculino , Pessoa de Meia-Idade , Sangue Oculto , Projetos Piloto , Avaliação de Programas e Projetos de Saúde , Fatores Socioeconômicos
12.
Patient Educ Couns ; 115: 107888, 2023 10.
Artigo em Inglês | MEDLINE | ID: mdl-37463555

RESUMO

BACKGROUND: Advancing health equity requires innovative patient education approaches for adapting English-language evidence-based interventions (EBIs) to resonate with multicultural, multilingual audiences. OBJECTIVE: Examine the benefit, functionality, and practical considerations of transcreation (translation + cultural adaptation) as a critical and salient learner-centric process for developing a Spanish-language intervention (photonovella + video): Un examen sencillo para un colon saludable (A simple test for a healthy colon). PATIENT/COMMUNITY INVOLVEMENT: We involved patients/community members in a participatory reflective process, from problem identification to intervention design, development, delivery, and impact measurement. METHODS: A community-based participatory research (CBPR) approach involving formative research plus systematic iterative pretesting and learner verification checks augmented by a community advisory board guided the transcreation processes. RESULTS: Data collected using a learner-centric approach effectively produced a new Spanish-language EBI and substantiated the value of co-learner/co-design methods. Learner-centric methods identified cultural nuances that were treated as knowledge and integrated into the intervention materials and study design. Pilot testing of the intervention among Latinos receiving care at community clinics demonstrated improved initial colorectal cancer screening uptake, awareness, and perceived susceptibility. DISCUSSION: Inherent in the transcreation process was learner involvement that informed essential modification and adaptation of the materials. The transcreation methods led to the development of a culturally salient intervention that maintained theoretical integrity and message intent as well as behavioral activation. Findings have broad implications for the creation and transfer of EBIs to new audiences for greater adoption, engagement, and 'reach' of interventions. PRACTICAL VALUE: Transcreation aligns with a growing paradigm shift in health communication science that brings to light the beneficial effect that construction and application of cultural knowledge has on patient education toward health equity.


Assuntos
Neoplasias Colorretais , Pesquisa Participativa Baseada na Comunidade , Idioma , Participação do Paciente , Humanos , Hispânico ou Latino , Projetos de Pesquisa , Assistência à Saúde Culturalmente Competente , Determinantes Sociais da Saúde , Equidade em Saúde
13.
JMIR Form Res ; 6(10): e37687, 2022 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-35238785

RESUMO

BACKGROUND: eHealth literacy is the ability to seek, obtain, and decipher online health information (OHI) for health and disease management. Rapid developments in eHealth (eg, health care services and online information) place increased demands on patients to have high eHealth literacy levels. Yet, greater emphasis on eHealth may disproportionately affect groups with limited eHealth literacy. Cultural background, language, and eHealth literacy are influential considerations affecting health care and information access, health care use, and successful eHealth resource use, and they may influence OHI seeking for behavioral change toward cancer prevention. OBJECTIVE: This study aimed to characterize the extent of OHI seeking and eHealth literacy among Spanish-dominant (SD) Latino adults aged 50 to 75 years. Further, we aimed to examine potential associations between sociodemographic characteristics, Preventive Health Model (PHM) constructs, OHI-seeking behaviors, and eHealth literacy, separately. METHODS: Participants (N=76) self-identified as Latino, were enrolled in a colorectal cancer (CRC) screening intervention, were aged 50 to 75 years, were at average risk for CRC, were not up to date with CRC screening, and preferred receiving health information in Spanish. We describe participants' sociodemographic characteristics, PHM constructs, OHI-seeking behaviors, and eHealth literacy-among those seeking OHI-assessed at enrollment. Descriptive analyses were first performed for all variables. Next, primary univariate logistic analyses explored possible associations with OHI seeking. Finally, using data from those seeking OHI, exploratory univariate analyses sought possible associations with eHealth literacy. RESULTS: A majority (51/76, 67%) of the participants were female, 62% (47/76) reported not having graduated high school, and 41% (31/76) reported being unemployed or having an annual income of less than US $10,000. Additionally, 75% (57/76) of the participants reported not having health insurance. In total, 71% (54/76) of the participants reported not having sought OHI for themselves or others. Univariate logistic regression suggested that higher educational attainment was significantly associated with an increased likelihood of having sought OHI (odds ratio 17.4, 95% CI 2.0-150.7; P=.009). Among those seeking OHI (22/76, 29%), 27% (6/22) were at risk of having low eHealth literacy based on an eHealth Literacy Scale score of less than 26. Among OHI seekers (22/76, 29%), an examination of associations found that higher eHealth literacy was associated with greater self-efficacy for screening with the fecal immunochemical test (ß=1.20, 95% CI 0.14-2.26; P=.02). CONCLUSIONS: Most SD Latino participants had not sought OHI for themselves or others (eg, family or friends), thus potentially limiting access to beneficial online resources. Preliminary findings convey that higher eHealth literacy occurs among those with higher self-efficacy for CRC screening. Findings inform areas of focus for future larger-scale investigations, including further exploration of reasons for not seeking OHI among SD Latino adults and an in-depth look at eHealth literacy and cancer screening behaviors. TRIAL REGISTRATION: ClinicalTrials.gov NCT03078361; https://clinicaltrials.gov/ct2/show/NCT03078361.

14.
Microorganisms ; 10(7)2022 Jul 14.
Artigo em Inglês | MEDLINE | ID: mdl-35889147

RESUMO

The gut microbiota (GM) comprises billions of microorganisms in the human gastrointestinal tract. This microbial community exerts numerous physiological functions. Prominent among these functions is the effect on host immunity through the uptake of nutrients that strengthen intestinal cells and cells involved in the immune response. The physiological functions of the GM are not limited to the gut, but bidirectional interactions between the gut microbiota and various extraintestinal organs have been identified. These interactions have been termed interorganic axes by several authors, among which the gut-brain, gut-skin, gut-lung, gut-heart, and gut-metabolism axes stand out. It has been shown that an organism is healthy or in homeostasis when the GM is in balance. However, altered GM or dysbiosis represents a critical factor in the pathogenesis of many local and systemic diseases. Therefore, probiotics intervene in this context, which, according to various published studies, allows balance to be maintained in the GM, leading to an individual's good health.

15.
Data Brief ; 42: 108138, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35496485

RESUMO

Groundwater with high fluoride concentrations has been recognized as one of the serious concerns worldwide. Besides, the fluoride released into the groundwater by slow dissolution of fluoride-containing rocks, various industries also contribute to fluoride pollution [1]. Excess intake of fluoride leads to various health problems such as dental and skeletal fluorosis, cancer, infertility, brain damage, thyroid diseases, etc. [2]. On the other hand, bromide is naturally present in surface and groundwater sources. However, during the chlorination process, bromide can be oxidized to HOBr, which can react with natural organic matter in water to form brominated organic disinfection byproducts, which are very harmful to human health [3]. Among various methods for water treatment, the adsorption process has been widely used and seems to be an efficient and attractive method for the removal of many contaminants in water, such as anions, in terms of cost, simplicity of design, and operation [4], [5]. In the past years, xerogels and carbon xerogels, a new type of adsorbents, which are synthesized by the sol-gel polycondensation of resorcinol and formaldehyde, have gained attention due to their moldable texture and chemical properties [6]. Moreover, melamine addition in resorcinol and formaldehyde xerogels adds basic groups on its surface, favouring Lewis acid-base interactions between xerogels and other components by adsorption [7]. In this data article, the synthesis of three resorcinol-formaldehyde (R/F) xerogels with an increasing amount of melamine (M) was carried out by colloidal polymerization (molar ratios of M/R = 0.5, M/R = 1.0, and M/R = 2.0). Additionally, samples of M/R = 0.5 xerogel were carbonized at 400, 450, and 550 °C under an inert atmosphere to increase their specific area. Organic and carbon xerogels obtained were characterized by FTIR, TGA, SEM, Physisorption of N2, and the pH at the point of zero charge (pHPZC). All organic xerogels were also tested as adsorbents on the removal of fluoride and bromide ions from aqueous phase. The Freundlich, Langmuir, and Radke-Prausnitz isotherm models were applied to interpret the experimental data from adsorption equilibrium. Additionally, the data of the mass of the xerogel needed to remove fluoride and bromide from groundwater and fulfill the maximum concentration levels are also included.

16.
J Am Heart Assoc ; 11(20): e026053, 2022 10 18.
Artigo em Inglês | MEDLINE | ID: mdl-36205262

RESUMO

Background Dietary polyphenol intake has been associated with a decreased risk of hyperuricemia, but most of this knowledge comes from preclinical studies. The aim of the present study was to assess the association of the intake of different classes of polyphenols with serum uric acid and hyperuricemia. Methods and Results This cross-sectional analysis involved baseline data of 6332 participants. Food polyphenol content was estimated by a validated semiquantitative food frequency questionnaire and from the Phenol-Explorer database. Multivariable-adjusted linear regression models with serum uric acid (milligrams per deciliter) as the outcome and polyphenol intake (quintiles) as the main independent variable were fitted. Cox regression models with constant follow-up time (t=1) were performed to estimate the prevalence ratios (PRs) of hyperuricemia (≥7 mg/dL in men and ≥6 mg/dL in women). An inverse association between the intake of the phenolic acid class (ß coefficient, -0.17 mg/dL for quintile 5 versus quintile 1 [95% CI, -0.27 to -0.06]) and hydroxycinnamic acids (ß coefficient, -0.19 [95% CI, -0.3 to -0.09]), alkylmethoxyphenols (ß coefficient, -0.2 [95% CI, -0.31 to -0.1]), and methoxyphenols (ß coefficient, -0.24 [95% CI, -0.34 to -0.13]) subclasses with serum uric acid levels and hyperuricemia (PR, 0.82 [95% CI, 0.71-0.95]; PR, 0.82 [95% CI, 0.71-0.95]; PR, 0.80 [95% CI, 0.70-0.92]; and PR, 0.79 [95% CI, 0.69-0.91]; respectively) was found. The intake of hydroxybenzoic acids was directly and significantly associated with mean serum uric acid levels (ß coefficient, 0.14 for quintile 5 versus quintile 1 [95% CI, 0.02-0.26]) but not with hyperuricemia. Conclusions In individuals with metabolic syndrome, a higher intake of some polyphenol subclasses (hydroxycinnamic acids, alkylmethoxyphenol, and methoxyphenol) was inversely associated with serum uric acid levels and hyperuricemia. Nevertheless, our findings warrant further research.


Assuntos
Doenças Cardiovasculares , Hiperuricemia , Masculino , Feminino , Humanos , Hiperuricemia/diagnóstico , Hiperuricemia/epidemiologia , Ácido Úrico , Estudos Transversais , Polifenóis , Ácidos Cumáricos , Fatores de Risco , Fatores de Risco de Doenças Cardíacas , Hidroxibenzoatos
17.
J Pediatric Infect Dis Soc ; 10(5): 691-694, 2021 May 28.
Artigo em Inglês | MEDLINE | ID: mdl-33306130

RESUMO

Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is a novel pandemic virus. Mounting evidence supports the possibility of vertical transmission, which at the present time appears to be rare. We report a newborn with vertically acquired SARS-CoV-2 who developed acute respiratory failure and received remdesivir and coronavirus disease 2019 convalescent plasma.


Assuntos
Monofosfato de Adenosina/análogos & derivados , Alanina/análogos & derivados , Antivirais/uso terapêutico , COVID-19/terapia , COVID-19/transmissão , Transmissão Vertical de Doenças Infecciosas , Pneumonia Viral/terapia , Pneumonia Viral/transmissão , Monofosfato de Adenosina/uso terapêutico , Adolescente , Alanina/uso terapêutico , Feminino , Humanos , Imunização Passiva , Recém-Nascido , Pneumonia Viral/virologia , SARS-CoV-2 , Soroterapia para COVID-19
18.
Cells ; 10(6)2021 06 11.
Artigo em Inglês | MEDLINE | ID: mdl-34208037

RESUMO

Neutrophils are the most abundant circulating innate immune cells and comprise the first immune defense line, as they are the most rapidly recruited cells at sites of infection or inflammation. Their main microbicidal mechanisms are degranulation, phagocytosis, cytokine secretion and the formation of extracellular traps. Neutrophil extracellular traps (NETs) are a microbicidal mechanism that involves neutrophil death. Since their discovery, in vitro and in vivo neutrophils have been challenged with a range of stimuli capable of inducing or inhibiting NET formation, with the objective to understand its function and regulation in health and disease. These networks composed of DNA and granular components are capable of immobilizing and killing pathogens. They comprise enzymes such as myeloperoxidase, elastase, cathepsin G, acid hydrolases and cationic peptides, all with antimicrobial and antifungal activity. Therefore, the excessive formation of NETs can also lead to tissue damage and promote local and systemic inflammation. Based on this concept, in this review, we focus on the role of NETs in different infectious and inflammatory diseases of the mucosal epithelia and skin.


Assuntos
Armadilhas Extracelulares/fisiologia , Mucosa/imunologia , Dermatopatias/imunologia , Células Epiteliais/imunologia , Interações Hospedeiro-Patógeno/imunologia , Humanos , Imunidade Inata/fisiologia , Neutrófilos/imunologia , Neutrófilos/fisiologia , Dermatopatias/patologia
19.
Biomolecules ; 11(11)2021 11 09.
Artigo em Inglês | MEDLINE | ID: mdl-34827656

RESUMO

Animal digestive systems host microorganism ecosystems, including integrated bacteria, viruses, fungi, and others, that produce a variety of compounds from different substrates with healthy properties. Among these substrates, α-galacto-oligosaccharides (GOS) are considered prebiotics that promote the grow of gut microbiota with a metabolic output of Short Chain Fatty Acids (SCFAs). In this regard, we evaluated Lupinus albus GOS (LA-GOS) as a natural prebiotic using different animal models. Therefore, the aim of this work was to evaluate the effect of LA-GOS on the gut microbiota, SCFA production, and intestinal health in healthy and induced dysbiosis conditions (an ulcerative colitis (UC) model). Twenty C57BL/6 mice were randomly allocated in four groups (n = 5/group): untreated and treated non-induced animals, and two groups induced with 2% dextran sulfate sodium to UC with and without LA-GOS administration (2.5 g/kg bw). We found that the UC treated group showed a higher goblet cell number, lower disease activity index, and reduced histopathological damage in comparison to the UC untreated group. In addition, the abundance of positive bacteria to butyryl-CoA transferase in gut microbiota was significantly increased by LA-GOS treatment, in healthy conditions. We measured the SCFA production with significant differences in the butyrate concentration between treated and untreated healthy groups. Finally, the pH level in cecum feces was reduced after LA-GOS treatment. Overall, we point out the in vivo health benefits of LA-GOS administration on the preservation of the intestinal ecosystem and the promotion of SCFA production.


Assuntos
Microbioma Gastrointestinal , Animais , Ecossistema , Lupinus , Camundongos
20.
Int J Immunopathol Pharmacol ; 34: 2058738420958949, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33373277

RESUMO

Neutrophils represent the first line of host cellular defense against various pathogens. The most recently described microbicidal mechanism of these cells is the release of neutrophil extracellular traps (NET). Currently, a wide range of chemical and biological stimuli are known to induce this response; however, the effect of short-chain fatty acids (SCFAs) on the induction of NET is still unknown. SCFAs are produced mainly by bacterial fermentation of dietary fiber and are found in host tissues and blood. This study aimed to determine whether physiological levels of SCFAs can induce the formation of NET. Previously reported concentrations of SCFAs (as found in the colonic lumen and peripheral blood in postprandial and basal states) were used to stimulate the neutrophils. In order to determine the signaling pathway utilized by SCFAs, we tested the inhibition of the Free Fatty Acid 2 Receptor (FFA2R) expressed in neutrophils using CATPB, the inhibitor of FFA2R, genistein, an inhibitor of the downstream Gα/q11 proteins and DPI, an inhibitor of the NADPH oxidase complex. The SCFAs at colonic intestinal lumen concentrations were able to induce the formation of NET, and when tested at concentrations found in the peripheral blood, only acetic acid at 100 µM (fasting equivalent) and 700 µM (postprandial equivalent) was found to induce the formation of NET. The administration of the competitive inhibitor against the receptor or blockade of relevant G protein signaling and the inhibition of NADPH oxidase complex decreased NET release. SCFAs stimulate NET formation in vitro and this effect is mediated, in part, by the FFA2R.


Assuntos
Ácido Acético/farmacologia , Armadilhas Extracelulares/metabolismo , Ácidos Graxos Voláteis/metabolismo , Neutrófilos/metabolismo , Armadilhas Extracelulares/efeitos dos fármacos , Ácidos Graxos Voláteis/farmacologia , Humanos , Concentração de Íons de Hidrogênio , Neutrófilos/efeitos dos fármacos , Receptores de Superfície Celular/metabolismo
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