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1.
Food Chem ; 457: 140057, 2024 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-38908248

RESUMO

The shelf life of perishable foods is estimated through expensive and imprecise analyses that do not account for improper storage. Smart packaging, obtained by agile manufacturing of nanofibers functionalized with natural pigments from agri-food residues, presents promising potential for real-time food quality monitoring. This study employed the solution blow spinning (SBS) technique for the rapid production of smart nanofiber mats based on polycaprolactone (PCL), incorporating extracts of agricultural residues rich in anthocyanins from eggplant (EE) or purple cabbage (CE) for monitoring food quality. The addition of EE or CE to the PCL matrix increased the viscosity of the solution and the diameter of the nanofibers from 156 nm to 261-370 nm. The addition of extracts also improved the mechanical and water-related properties of the nanofibers, although it reduced the thermal stability. Attenuated total reflectance Fourier-transform infrared spectroscopy confirmed the incorporation of anthocyanins into PCL nanofibers. Nanofiber mats incorporated with EE or CE exhibited visible color changes (ΔE ≥ 3) in response to buffer solutions (pH between 3 and 10), and ammonia vapor. Smart nanofibers have demonstrated the ability to monitor fish fillet spoilage through visible color changes (ΔE ≥ 3) during storage. Consequently, smart nanofibers produced by the SBS technique, using PCL and anthocyanins from agro-industrial waste, reveal potential as smart packaging materials for food.

2.
Viruses ; 16(3)2024 02 21.
Artigo em Inglês | MEDLINE | ID: mdl-38543693

RESUMO

Cervical cancer is primarily caused by Human Papillomavirus (HPV) infection and remains a significant public health concern, particularly in Latin American regions. This comprehensive narrative review addresses the relationship between Human Papillomavirus (HPV) and cervical cancer, focusing on Latin American women. It explores molecular and immunological aspects of HPV infection, its role in cervical cancer development, and the epidemiology in this region, highlighting the prevalence and diversity of HPV genotypes. The impact of vaccination initiatives on cervical cancer rates in Latin America is critically evaluated. The advent of HPV vaccines has presented a significant tool in combating the burden of this malignancy, with notable successes observed in various countries, the latter due to their impact on immune responses. The review synthesizes current knowledge, emphasizes the importance of continued research and strategies for cervical cancer prevention, and underscores the need for ongoing efforts in this field.


Assuntos
Infecções por Papillomavirus , Vacinas contra Papillomavirus , Neoplasias do Colo do Útero , Humanos , Feminino , Neoplasias do Colo do Útero/epidemiologia , Neoplasias do Colo do Útero/prevenção & controle , Neoplasias do Colo do Útero/patologia , Papillomavirus Humano , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/prevenção & controle , América Latina/epidemiologia , Papillomaviridae/genética , Vacinação
3.
Int J Biol Macromol ; 246: 125648, 2023 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-37406922

RESUMO

Kefiran is a biomaterial with potential application in developing novel materials for food technology. In this study, sugarcane sugar (REF), raw sugar (RAS), brown sugar (BRS), soy molasses (SOM), and sugarcane molasses (SCM) were evaluated for the production of kefiran from kefir biomass rather than cow's milk (CMK), the usual medium. The produced kefiran was purified and characterized by colorimetry, Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis, and morphology. It was also assayed for antioxidant and antimicrobial activity. SCM had the highest average daily rate of kefir biomass production (29.17 %/day). The composition of the culture medium affected the microbial diversity of kefir grains, and the Lactobacillus genus was the most abundant (39.8 %, 40.0 %, and 83.9 % to SCM, SOM, and CMK, respectively) in the samples that presented the highest biomass production and kefiran extraction yields. FTIR spectra showed that the bands of kefiran produced in REF and RAS were narrower than those of the other samples. Kefiran grew in an alternative culture medium also exhibited higher thermal stability (Tonset and TMax was higher than 250 and 280 °C, respectively). Those grown in SOM and SCM displayed antimicrobial and antioxidant activities similar to those of kefiran produced in CMK. The results indicate that agro-industrial by-products (SCM and SOM) are potential alternatives for kefiran production from kefir biomass.


Assuntos
Antioxidantes , Polissacarídeos , Animais , Feminino , Bovinos , Antioxidantes/farmacologia , Polissacarídeos/farmacologia , Polissacarídeos/química , Meios de Cultura , Açúcares , Fermentação
5.
Plants (Basel) ; 12(6)2023 Mar 10.
Artigo em Inglês | MEDLINE | ID: mdl-36986952

RESUMO

Baccharis is one of the largest genera of Asteraceae and its species are used in folk medicine for several medicinal purposes due to the presence of bioactive compounds. We investigated the phytochemical composition of polar extracts of B. sphenophylla. Using chromatographic procedures, diterpenoids (ent-kaurenoic acid), flavonoids (hispidulin, eupafolin, isoquercitrin, quercitrin, biorobin, rutin, and vicenin-2), caffeic acid, and chlorogenic acid derivatives (5-O-caffeoylquinic acid and its methyl ester, 3,4-di-O-caffeoylquinic acid, 4,5-di-O-caffeoylquinic acid, and 3,5-di-O-caffeoylquinic acid and its methyl ester) were isolated from polar fractions and are described. The extract, polar fractions, and fifteen isolated compounds were evaluated in relation to radical scavenging activity using two assays. Chlorogenic acid derivatives and flavonols exhibited higher antioxidant effects, confirming that B. sphenophylla is an important source of phenolic compounds with antiradical properties.

8.
Arch Dermatol Res ; 315(6): 1603-1613, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-36757439

RESUMO

There is little clarity about the clinical manifestations of dermatomyositis (DM) in the periungual folds, scalp, and oral cavity and their association with disease activity and damage. The objective of this study was to compare the prevalence of trichoscopic, oral, and periungual changes between DM and healthy patients and assess their possible association with disease activity and damage. We conducted an observational, transversal, and analytical study between 2020 and 2021. Forty DM patients were matched by sex and age with 40 healthy individuals. On the same day, all patients had a clinical evaluation of the hands, periungual folds, scalp, and oral cavity. Photographs of these areas and peripheral venous blood tests, including myositis-associated (MAAs) and myositis-specific antibodies (MSAs), were taken. Two dermatologists blinded to their diagnosis, damage, and activity levels registered the lesions. The disease activity and damage were evaluated using the Cutaneous Dermatomyositis Disease Area and Severity Index (CDASI). The presence of mechanic's hands, Gottron's sign, and Gottron's papules in hands; capillary dilation, capillary tortuosity, cuticular hemorrhage, avascular areas, and cuticular hyperkeratosis in periungual folds; thick tortuous capillaries in scalp; gingival telangiectasias in the oral cavity; and positive MSAs associated with severe cutaneous involvement in DM patients (Anti-TIF1g, Anti-MDA5, Anti-SAE1/2) were associated with a higher CDASI activity score. The presence of MSAs associated with intense muscle involvement in DM patients (Anti-Mi2a, Anti-Mi2b, Anti-NPX2, and Anti-SAE1/2) was related to a lower CDASI activity score. Gottron's sign and Gottron's papules in hands; capillary dilation, capillary tortuosity, cuticular hemorrhage, avascular areas, and cuticular hyperkeratosis in periungual folds; basal erythema in scalp; and gingival telangiectasias in the oral cavity were associated with a higher CDASI damage score. There are trichoscopic, oral and periungual fold findings and some myositis-specific antibodies that correlate with disease activity and damage in DM patients.


Assuntos
Dermatomiosite , Manifestações Bucais , Síndromes Paraneoplásicas , Humanos , Prevalência , Dermoscopia , Unhas , Estudos de Casos e Controles , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Autoanticorpos
9.
Infect Immun ; 91(1): e0047622, 2023 01 24.
Artigo em Inglês | MEDLINE | ID: mdl-36448839

RESUMO

Clostridioides difficile causes antibiotic-associated diseases in humans, ranging from mild diarrhea to severe pseudomembranous colitis and death. A major clinical challenge is the prevention of disease recurrence, which affects nearly ~20 to 30% of the patients with a primary C. difficile infection (CDI). During CDI, C. difficile forms metabolically dormant spores that are essential for recurrence of CDI (R-CDI). In prior studies, we have shown that C. difficile spores interact with intestinal epithelial cells (IECs), which contribute to R-CDI. However, this interaction remains poorly understood. Here, we provide evidence that C. difficile spores interact with E-cadherin, contributing to spore adherence and internalization into IECs. C. difficile toxins TcdA and TcdB lead to adherens junctions opening and increase spore adherence to IECs. Confocal micrographs demonstrate that C. difficile spores associate with accessible E-cadherin; spore-E-cadherin association increases upon TcdA and TcdB intoxication. The presence of anti-E-cadherin antibodies decreased spore adherence and entry into IECs. By enzyme-linked immunosorbent assay (ELISA), immunofluorescence, and immunogold labeling, we observed that E-cadherin binds to C. difficile spores, specifically to the hairlike projections of the spore, reducing spore adherence to IECs. Overall, these results expand our knowledge of how C. difficile spores bind to IECs by providing evidence that E-cadherin acts as a spore adherence receptor to IECs and by revealing how toxin-mediated damage affects spore interactions with IECs.


Assuntos
Toxinas Bacterianas , Clostridioides difficile , Humanos , Junções Aderentes , Proteínas de Bactérias/metabolismo , Toxinas Bacterianas/metabolismo , Clostridioides , Esporos Bacterianos , Caderinas/metabolismo
10.
Plant Sci ; 327: 111558, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36493930

RESUMO

The most devastating fungal disease of peaches and nectarines is brown rot, caused by Monilinia spp. Among the many plant responses against biotic stress, plant terpenoids play essential protective functions, including antioxidant activities and inhibition of pathogen growth. Herein, we aimed to characterize the expression of terpenoid biosynthetic genes in fruit tissues that presented different susceptibility to brown rot. For that, we performed artificial inoculations with Monilinia laxa at two developmental stages (immature and mature fruit) of two nectarine cultivars ('Venus' -mid-early season cultivar - and 'Albared' -late season cultivar-) and in vitro tests of the key compounds observed in the transcriptional results. All fruit were susceptible to M. laxa except for immature 'Venus' nectarines. In response to the pathogen, the mevalonic acid (MVA) pathway of the 'Venus' cultivar was highly induced in both stages rather than the methylerythritol phosphate (MEP) pathway, being the expression of some MEP-related biosynthetic genes [e.g., PROTEIN FARNESYLTRANSFERASE (PpPFT), and 3S-LINALOOL SYNTHASE (PpLIS)] different between stages. In 'Albared', both stages presented similar responses to M. laxa for both pathways. Comparisons between cultivars showed that HYDROXYMETHYLGLUTARYL-CoA REDUCTASE (PpHMGR1) expression levels were common in susceptible tissues. Within all the terpenoid biosynthetic pathway, linalool- and farnesal-related pathways stood out for being upregulated only in resistant tissues, which suggest their role in mediating the resistance to M. laxa. The in vitro antifungal activity of linalool and farnesol (precursor of farnesal) revealed fungicidal and fungistatic activities against M. laxa, respectively, depending on the concentration tested. Understanding the different responses between resistant and susceptible tissues could be further considered for breeding or developing new strategies to control brown rot in stone fruit.


Assuntos
Farneseno Álcool , Frutas , Frutas/genética , Doenças das Plantas/genética , Doenças das Plantas/microbiologia , Melhoramento Vegetal , Técnicas In Vitro
11.
Plant Physiol ; 191(1): 575-590, 2023 01 02.
Artigo em Inglês | MEDLINE | ID: mdl-36053186

RESUMO

Postharvest fungal pathogens benefit from the increased host susceptibility that occurs during fruit ripening. In unripe fruit, pathogens often remain quiescent and unable to cause disease until ripening begins, emerging at this point into destructive necrotrophic lifestyles that quickly result in fruit decay. Here, we demonstrate that one such pathogen, Botrytis cinerea, actively induces ripening processes to facilitate infections and promote disease in tomato (Solanum lycopersicum). Assessments of ripening progression revealed that B. cinerea accelerated external coloration, ethylene production, and softening in unripe fruit, while mRNA sequencing of inoculated unripe fruit confirmed the corresponding upregulation of host genes involved in ripening processes, such as ethylene biosynthesis and cell wall degradation. Furthermore, an enzyme-linked immunosorbent assay (ELISA)-based glycomics technique used to assess fruit cell wall polysaccharides revealed remarkable similarities in the cell wall polysaccharide changes caused by both infections of unripe fruit and ripening of healthy fruit, particularly in the increased accessibility of pectic polysaccharides. Virulence and additional ripening assessment experiments with B. cinerea knockout mutants showed that induction of ripening depends on the ability to infect the host and break down pectin. The B. cinerea double knockout Δbc polygalacturonase1 Δbc polygalacturonase2 lacking two critical pectin degrading enzymes was incapable of emerging from quiescence even long after the fruit had ripened at its own pace, suggesting that the failure to accelerate ripening severely inhibits fungal survival on unripe fruit. These findings demonstrate that active induction of ripening in unripe tomato fruit is an important infection strategy for B. cinerea.


Assuntos
Solanum lycopersicum , Solanum lycopersicum/genética , Frutas/genética , Frutas/metabolismo , Polissacarídeos/metabolismo , Etilenos/metabolismo , Botrytis/fisiologia , Pectinas/metabolismo , Parede Celular/metabolismo
12.
Artigo em Português | LILACS | ID: biblio-1511501

RESUMO

Introdução: As deleções intersticiais envolvendo a região 2q31q32 são reconhecidas como um transtorno clínico, envolvendo diversas manifestações como deficiência intelectual, retardo no crescimento, distúrbios comportamentais e dismorfologias faciais. Os números reduzidos de relatos de pacientes acometidos por essa síndrome contribui para que as correlações genótipos-fenótipos sejam difíceis de se fazer. Relato de caso: Paciente com inversão do braço longo do cromossomo 2 [46, XX,inv(2)(q21q33)]. Apresentou ao exame físico dismorfológico fronte proeminente, epicanto, ponte nasal baixa, filtro nasolabial longo e lábio superior fino. Ao exame neurológico, apresentava hipotonia. Discussão: Uma correta interpretação cromossômica pode não só identificar a síndrome de microdeleção como também, descartar ou confirmar possíveis diagnósticos diferenciais, deixando evidente a necessidade e a importância de se reconhecer e documentar os casos (AU).


Introduction: Interstitial deletions involving the 2q31q32 region are recognized as a clinical disorder involving several manifestations, such as intellectual disability, growth retardation, behavioral disorders, and facial dysmorphologies. The reduced number of reports of patients affected by this syndrome contributes to the difficulty of making genotype-phenotype correlations. Case report: Patient with inversion of the long arm of chromosome 2 [46, XX,inv(2)(q21q33)]. On physical examination, he had a prominent forehead, epicanthus, low nasal bridge, long nasolabial philtrum and thin upper lip. Neurological examination showed hypotonia. Discussion: A correct chromosomal interpretation can identify the microdeletion syndrome and rule out or confirm possible differential diagnoses, highlighting the need and importance of recognizing and documenting cases (AU).


Assuntos
Humanos , Feminino , Lactente , Deleção Cromossômica
13.
REVISA (Online) ; 12(4): 738-746, 2023.
Artigo em Português | LILACS | ID: biblio-1527510

RESUMO

Objetivo: Analisar as perspectivas atuais acerca (des) caminhos da saúde bucal coletiva no Brasil. Método:Trata-se de um estudo bibliográfico de abordagem quantitativa. A pesquisa abrange a busca de artigos publicados nos últimos dez anos, na Scientific Electronic Library Online ­Scielo. Resultados:Ao realizar a triagem desses artigos, utilizando os critérios de inclusão, têm-se para o estudo um total de dez artigos, sendo (30%) em 2015, (40%) em (2016, 2019) e 30% em (2017, 2021, 2023). Conclusão:a PNSB vem apresentando grandes avanços conforme sua sériehistórica e o programa Brasil Sorridente tem como compromisso qualificar a atenção básica, garantindo universalidade, equidade, integralidade da assistência e resolutividade, conforme os princípios doutrinários do SUS.


Objective: To analyze the current perspectives on the (mis)paths of collective oral health in Brazil. Method:This is a bibliographic study with a quantitative approach. The search includes the search for articles published in the last ten years in the Scientific Electronic Library Online ­Scielo. Results:When screening these articles, using the inclusion criteria, a total of ten articles were included in the study, (30%) in 2015, (40%) in (2016, 2019) and 30% in (2017, 2021, 2023). Conclusion:the PNSB has been showing great advances according to its historical series and the Smiling Brazil program is committed to qualifying primary care, ensuring universality, equity, comprehensiveness of care and problem-solving, according to the doctrinal principles of the SUS.


Objetivo: Analizar las perspectivas actuales sobre los (des)caminos de la salud bucal colectiva en Brasil.Método: Se trata de un estudio bibliográfico con enfoque cuantitativo. La búsqueda incluye la búsqueda de artículos publicados en los últimos diez años en la Scientific Electronic Library Online ­Scielo. Resultados:Al cribar estos artículos, utilizando los criterios de inclusión, se incluyeron en el estudio un total de diez artículos, (30%) en 2015, (40%) en (2016, 2019) y 30% en (2017, 2021, 2023).Conclusión: el PNSB viene mostrando grandes avances de acuerdo con su serie histórica y el programa Brasil Sonriente está comprometido con la calificación de la atención básica, garantizando la universalidad, la equidad, la integralidad de la atención y la resolución de problemas, de acuerdo con los principios doctrinarios del SUS.


Assuntos
Cárie Dentária , Sorriso , Saúde Bucal , Política de Saúde
14.
Ecancermedicalscience ; 16: 1417, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36158989

RESUMO

Introduction: Oral anticancer therapy has the benefit of allowing cancer patients to carry out their treatment at home, without being inconvenienced or being at risk of nosocomial infection. However, non-adherence is a public health problem that contributes to the clinical decline of the patient and there are no studies submitted on the adherence of cancer patients to oral anti-anticancer agents in Santarém, PA. Objective: In view of this, the general objective of this work was to evaluate this oral medication adherence. Methods: The methodology consisted of a cross-sectional documentary study with a quantitative approach of patients seen at the pharmaceutical office. The Morisky-Green test was used to analyse the degree of adherence and descriptive and inferential statistics were used (p < 0.05). Results: Patients' adherence to antitumour therapy was not 100%, the majority belonging to females; men were the most adherent, showing adverse reactions to anti-anticancer agents (p = 0.0096); comorbidity (p = 0.0202) negatively impacted adherence. Conclusion: It is necessary to adopt new clinical procedures that can contribute to the management of these variables that prevent adherence, in order to improve the effectiveness of the treatment of these patients. There are circumstances that go beyond the aspects inherent to the patient, so it is also relevant to research the external factors that influence the individual's behaviour, such as the duration of therapy and the consequences of the treatment in the patient's routine.

15.
Oncol Lett ; 24(2): 288, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35814823

RESUMO

Natural killer (NK) cells play a crucial role in cervical cancer (CC). As estrogens and prolactin (PRL) have been reported to be involved in CC, the present study attempted to elucidate the effects of both hormones on NK cells in CC. For this purpose, NKL cells, as well as CC-derived cell lines (HeLa, SiHa and C33A) and non-tumorigenic keratinocytes (HaCaT cells) were stimulated with 17ß-estradiol (E2; 10 nM), PRL (200 ng/ml), or both (E2 and PRL) for 48 h. The expression of hormone receptors (estrogen receptor α and ß, G protein-coupled estrogen receptor 1 and PRL receptor) and NK cell activating receptors [natural killer group 2D (NKG2D), natural cytotoxicity triggering receptor 3, natural cytotoxicity triggering receptor 2 and natural cytotoxicity triggering receptor 1] were measured using western blot analysis and flow cytometry, respectively. In the HeLa, SiHa, C33A and HaCaT cells stimulated with the hormones, the expression of NKG2D ligands [MHC class I polypeptide-related sequence A/B (MICA/B)] on the membrane and the soluble form of MICA was evaluated using flow cytometry and ELISA. Cytotoxicity assay was performed using GFP-transfected K562 cells as target cells. E2 reduced NKL cell-mediated cytotoxicity, while PRL exerted the opposite effect. NKL cells expressed different hormone receptor forms, of which PRL only induced a decrease in NKG2D expression compared to the untreated control NKL cells. PRL increased MICA/B expression in HeLa cells and E2 and PRL reversed this effect. However, in SiHa cells, the concurrent incubation with the two hormones decreased MICA/B expression. E2 and PRL, either alone or in combination, decreased soluble MICA secretion in all CC cell lines, while E2 solely increased soluble MICA secretion in SiHa cells. On the whole, the present study provides evidence that E2 and PRL mediate the mechanisms through which NK and CC cells mediate a cytotoxic response and these have an antagonistic effect on NK cell-mediated cytotoxicity.

17.
Int J Mol Sci ; 23(7)2022 Mar 31.
Artigo em Inglês | MEDLINE | ID: mdl-35409202

RESUMO

Diabetes mellitus (DM) burden encompasses diabetic kidney disease (DKD), the leading cause of end-stage renal disease worldwide. Despite compelling evidence indicating that pharmacological intervention curtails DKD progression, the search for non-pharmacological strategies can identify novel targets for drug development against metabolic diseases. One of those emergent strategies comprises the modulation of the intestinal microbiota through fecal transplant from healthy donors. This study sought to investigate the benefits of fecal microbiota transplant (FMT) on functional and morphological parameters in a preclinical model of type 2 DM, obesity, and DKD using BTBRob/ob mice. These animals develop hyperglycemia and albuminuria in a time-dependent manner, mimicking DKD in humans. Our main findings unveiled that FMT prevented body weight gain, reduced albuminuria and tumor necrosis factor-α (TNF-α) levels within the ileum and ascending colon, and potentially ameliorated insulin resistance in BTBRob/ob mice. Intestinal structural integrity was maintained. Notably, FMT was associated with the abundance of the succinate-consuming Odoribacteraceae bacteria family throughout the intestine. Collectively, our data pointed out the safety and efficacy of FMT in a preclinical model of type 2 DM, obesity, and DKD. These findings provide a basis for translational research on intestinal microbiota modulation and testing its therapeutic potential combined with current treatment for DM.


Assuntos
Diabetes Mellitus Tipo 2 , Nefropatias Diabéticas , Albuminúria/complicações , Animais , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/metabolismo , Diabetes Mellitus Tipo 2/terapia , Nefropatias Diabéticas/metabolismo , Transplante de Microbiota Fecal/efeitos adversos , Camundongos , Camundongos Endogâmicos , Obesidade/complicações , Obesidade/metabolismo , Obesidade/terapia
18.
Biodivers Data J ; 10: e75910, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35095296

RESUMO

BACKGROUND: The Atlantic Forest is one of the most threatened biomes in the world. Despite that, this biome still includes many areas that are poorly known floristically, including several protected areas, such as the "Floresta Nacional do Rio Preto" ("Flona do Rio Preto"), located in the Brazilian State of Espírito Santo. This study used a published vascular plant species list for this protected area from the "Catálogo de Plantas das Unidades de Conservação do Brasil" as the basis to synthesise the species richness, endemism, conservation and new species occurrences found in the "Flona do Rio Preto". NEW INFORMATION: The published list of vascular plants was based on field expeditions conducted between 2018 and 2020 and data obtained from herbarium collections available in online databases. Overall, 722 species were documented for the "Flona do Rio Preto", 711 of which are native to Brazil and 349 are endemic to the Atlantic Forest. In addition, 60 species are geographically disjunct between the Atlantic and the Amazon Forests. Most of the documented species are woody and more than 50% of these are trees. Twenty-three species are threatened (CR, EN and VU), while five are Data Deficient (DD). Thirty-two species are new records for the State of Espírito Santo. Our results expand the knowledge of the flora of the Atlantic Forest and provide support for the development of new conservation policies for this protected area.

19.
Mol Biochem Parasitol ; 247: 111433, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34822916

RESUMO

Toxoplasma gondii (T. gondii) is a parasite common in pregnancy. Monocytes and macrophages are a significant immunologic barrier against T. gondii by boosting up inflammation. This outcome is highly regulated by signaling pathways such as MAPK (ERK1/2) and PI3K (AKT), necessary in cell growth and proliferation. It may be associated with the hormonal receptors' modulation by T. gondii (Estrogen Receptor (ER)-α, ERß, G Protein-coupled ER (GPER), and Prolactin Receptor (PRLR)), as previously reported by our research group. 17ß-estradiol also activates MAPK and PI3K; however, its combined effect in THP-1 monocytes and macrophages, infected with T. gondii, has not yet been evaluated. This study aimed to evaluate the combined effect of 17ß-estradiol in the activation of signaling pathways using a model of THP-1 monocytes and macrophages infected with T. gondii. THP-1 monocytes were cultured and differentiated into macrophages. Inhibition of AKT and ERK1/2 was performed with specific inhibitors. Stimuli were performed with 17ß-estradiol (10 nM), T. gondii (20,000 tachyzoites), and both conditions for 48 h. Proteins were extracted and quantified, and Western Blot assays were performed. 17ß-estradiol performed activation of ERK1/2 and AKT in T. gondii-infected macrophages. 17ß-estradiol modulated the expression of hormonal receptors in infected cells: increases the PRLR and PrgR in T. gondii-infected macrophages and decreases the PRLR and ERα in T. gondii-infected monocytes. As for GPER, its expression is abolished by T. gondii, and 17ß-estradiol cannot restore it. Finally, the blockage of ERK and AKT pathways modified the expression of hormonal receptors. In conclusion, 17ß-estradiol modifies the receptors of T. gondii-infected THP1 macrophages and monocytes in an ERK/AKT dependent manner.


Assuntos
Toxoplasma , Estradiol/farmacologia , Macrófagos/metabolismo , Monócitos/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Toxoplasma/metabolismo
20.
Front Endocrinol (Lausanne) ; 12: 747810, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34745013

RESUMO

Prolactin (PRL) is a hormone produced by the pituitary gland and multiple non-pituitary sites, vital in several physiological processes such as lactation, pregnancy, cell growth, and differentiation. However, PRL is nowadays known to have a strong implication in oncogenic processes, making it essential to delve into the mechanisms governing these actions. PRL and its receptor (PRLR) activate a series of effects such as survival, cellular proliferation, migration, invasion, metastasis, and resistance to treatment, being highly relevant in developing certain types of cancer. Because women produce high levels of PRL, its influence in gynecological cancers is herein reviewed. It is interesting that, other than the 23 kDa PRL, whose mechanism of action is endocrine, other variants of PRL have been observed to be produced by tumoral tissue, acting in a paracrine/autocrine manner. Because many components, including PRL, surround the microenvironment, it is interesting to understand the hormone's modulation in cancer cells. This work aims to review the most important findings regarding the PRL/PRLR axis in cervical, ovarian, and endometrial cancers and its molecular mechanisms to support carcinogenesis.


Assuntos
Transformação Celular Neoplásica , Neoplasias dos Genitais Femininos/patologia , Prolactina/fisiologia , Transformação Celular Neoplásica/genética , Transformação Celular Neoplásica/metabolismo , Feminino , Neoplasias dos Genitais Femininos/metabolismo , Humanos , Prolactina/metabolismo , Receptores da Prolactina/metabolismo , Receptores da Prolactina/fisiologia , Transdução de Sinais/fisiologia , Microambiente Tumoral/fisiologia
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