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1.
Protein Pept Lett ; 28(10): 1164-1179, 2021.
Article in English | MEDLINE | ID: mdl-34315363

ABSTRACT

BACKGROUND: It is well known that alcohol can trigger inflammatory effects in the gastrointestinal tract (GIT), interfering with mucosal homeostasis. OBJECTIVES: This study evaluated the effectiveness of Lactococcus lactis treatment in controlling the increase in molecular biomarkers related to allergic inflammation and the effect on the diversity and abundance of the Enterobacteriaceae family in the GIT after high-dose acute administration of ethanol. METHODS: Mice received ethanol or saline solution by gavage for four consecutive days, and 24 h after the last administration, the animals were given L. lactis or M17 broth orally ad libitum for two consecutive days. The animals were subsequently sacrificed and dissected. RESULTS: L. lactis treatment was able to restore basal levels of secretory immunoglobulin A in the gastric mucosa, serum total immunoglobulin E, interleukin (IL)-4 production in gastric and intestinal tissues, and IL-10 levels in gastric tissue. L. lactis treatment encouraged the diversification of the Enterobacteriaceae population, particularly the commensal species, in the GIT. CONCLUSION: This research opens a field of studies regarding the modulatory effect of L. lactis on immunological and microbial changes induced after alcohol intake.


Subject(s)
Enterobacteriaceae/metabolism , Ethanol/metabolism , Immunoglobulin E/metabolism , Interleukin-4/metabolism , Lactococcus lactis/metabolism , Administration, Oral , Alcohol Drinking , Animals , Cytokines/metabolism , Ethanol/administration & dosage , Female , Gastrointestinal Tract , Humans , Immunoglobulin A/metabolism , Immunoglobulin E/blood , Inflammation/metabolism , Interleukin-4/blood , Intestinal Mucosa/metabolism , Mice , Mice, Inbred C57BL
2.
RGO (Porto Alegre) ; 65(3): 223-228, July-Sept. 2017. tab, graf
Article in English | LILACS, BBO - Dentistry | ID: biblio-896021

ABSTRACT

ABSTRACT Objective To evaluate if dental students with the habit of smoking exhibit alterations in the epithelial cells of the cheek mucosa on the nuclear area (NA), cytoplasmic area (CA) or in the nucleus/cytoplasm ratio (NA/CA), when compared to non-smokers. Methods This is a descriptive, experimental study using a control group. The sample comprised 40 dental undergraduates (20 smokers and 20 non-smokers). Individuals who smoked at least 5 or 6 cigarettes a day were deemed to be smokers, while non-smokers were those who reported having no experience of any form of smoking. The samples of epithelial cells were obtained from the oral mucosa using the liquid-based exfoliative cytology technique. The slides were processed in the laboratory, stained using the Papanicolau technique and were analyzed via an image analysis system (analySIS getIT). A structured questionnaire was applied with the aim of measuring independent variables related to personal characteristics, health and lifestyle behavior. Results The values obtained in the group of smokers were as follows: NA (169.4 µm² ± 17.0), CA (1240.1 µm² ± 128.9) and NA/CA ratio (0.1375 ± 0.01743). The results did not evidence significant differences when compared to the control group: NA (170.7 µm² ± 20.0), CA (1255.3 µm² ± 174.5) and NA/CA (0.1380 ± 0.01436). Conclusion It was not possible to observe significant cell alterations in the NA, CA or the NA/CA ratio of epithelial cells of the oral mucosa. Other risk factors associated with tobacco should be studied, principally the length of exposure to the properties of the causative agent.


RESUMO Objetivo Avaliar se os estudantes de odontologia que possuem hábitos tabagistas apresentam alterações celulares nas células epiteliais da mucosa jugal sobre as áreas nucleares (AN), citoplasmáticas (AC) e na relação núcleo/citoplasma (AN/AC) quando comparados a não fumantes. Métodos Trata-se de um estudo experimental, descritivo com grupo controle. A amostra foi composta por 40 estudantes de graduação em odontologia (20 fumantes e 20 não fumantes). Consideraram-se fumantes aqueles indivíduos que fumavam diariamente, no mínimo, cinco a seis cigarros do tipo industrializado; e não fumantes aqueles indivíduos que relataram a não experiência com qualquer tipo de fumo. As amostras de células epiteliais foram obtidas da mucosa oral pela técnica de citologia esfoliativa em meio líquido. As lâminas foram processadas em laboratório, coradas pela técnica de Papanicolau e analisadas através de um sistema de análise de imagens (Analysis getlt). Um questionário estruturado foi aplicado com o intuito de mensurar variáveis independentes referentes às características pessoais, comportamentos em saúde e estilo de vida. Resultados Os valores obtidos no grupo dos fumantes para a AN (169,4 µm² ± 17,0), AC (1240,1 µm² ± 128,9) e na relação AN/AC (0,1375 ± 0,01743) não apresentaram resultados com diferenças expressivas quando comparados ao grupo controle AN (170,7 µm² ± 20,0), AC (1255,3 µm² ± 174,5) e na AN/AC (0,1380 ± 0,01436). Conclusão Não foi possível observar alterações celulares significantes nas AN, AC e na relação AN/AC de células epiteliais da mucosa oral. Outros fatores de risco associados ao tabaco devem ser estudados, principalmente o tempo de exposição às propriedades do agente causador.

3.
Regul Pept ; 179(1-3): 6-9, 2012 Nov 10.
Article in English | MEDLINE | ID: mdl-22960410

ABSTRACT

Previous studies revealed the presence of LTC(4) synthase in paraventricular vasopressinergic neurons, suggesting a role for leukotrienes (LTs) in certain neuroendocrine system functions. Our aim was to study the effect of an inhibitor of LT synthesis in the release of arginine vasopressin (AVP) following an osmotic stimulus in rats. Male Wistar rats received an intra-cerebroventricular injection of 2 µl of the LT synthesis inhibitor MK-886 (1, 2, or 4 µg/kg), or vehicle (DMSO 5%), 1h before an intraperitoneal injection of hypertonic saline (NaCl 2M) or isotonic saline (NaCl 0.01 M) in a volume corresponding to 1% of body weight. Thirty minutes after the osmotic stimulus, the animals were decapitated and blood was collected for determining hematocrit, plasma osmolality and plasma AVP levels. As expected, the injection of hypertonic saline significantly increased (P<0.05) the hematocrit, plasma osmolality and plasma AVP levels. While inhibiting LT synthesis by central administration of MK-886 did not cause any additional increase in hematocrit or osmolality, plasma AVP levels were augmented (P<0.05). We conclude that central leukotrienes may have a modulatory role in AVP secretion following an osmotic stimulus, this deserving future studies.


Subject(s)
Arginine Vasopressin/metabolism , Glutathione Transferase/metabolism , Indoles/pharmacology , Leukotriene Antagonists/pharmacology , Leukotrienes/biosynthesis , 5-Lipoxygenase-Activating Protein Inhibitors/pharmacology , 5-Lipoxygenase-Activating Proteins/metabolism , Animals , Arginine Vasopressin/blood , Body Weight , Glutathione Transferase/antagonists & inhibitors , Hematocrit , Indoles/administration & dosage , Leukotriene Antagonists/administration & dosage , Leukotrienes/metabolism , Male , Neurons/drug effects , Neurons/enzymology , Neurons/metabolism , Osmolar Concentration , Radioimmunoassay , Rats , Rats, Wistar , Saline Solution, Hypertonic/administration & dosage , Saline Solution, Hypertonic/pharmacology , Sodium Chloride/administration & dosage
4.
Rev. bras. anal. clin ; 42(4): 255-259, 2010. tab
Article in Portuguese | LILACS | ID: lil-579391

ABSTRACT

O objetivo deste estudo foi avaliar a presença de marcadores sorológicos para hepatite B em profissionais acadêmicos da área da saúde, assim como a situação vacinal destes acadêmicos. Participaram da pesquisa 50 profissionais acadêmicos da área da saúde. As amostras foram identificadas e estocadas até a realização dos testes. Realizou-se através de ensaio imunoenzimático a detecção dos seguintes marcadores HBsAg, anti HBc e anti HBs. Os dados analisados mostraram que 28% foram reagentes para o HBsAg e 72% não reagentes. Quanto ao anti HBc, 98% foram não reagentes e 2% mostraram reagentes. Em relação ao anti HBs, 48% mostraram positividade enquanto 52% foram não regentes. Observou-se qua a grande maioria dos acad~emicos foi vacinada (80%), e 20% nunca receberam a vacina. A imunogênese anti HBs (+) completou-se em 57, 5% dos vacinados, entretanto 42,5% dos participantes que foram vacinados apresentaram anti HBs (-). Baseados nestes resultados, conclui-se que a campanha de vacinação e implantação de medidas profiláticas devem ser intensificadas, bem como a realização de triagem sorológica para hepatite B dos profissionais da área da saúde para confirmação da imunização, visando à prevenção e controle da infecção pelo HBV nestes profissionais.


Subject(s)
Humans , Male , Female , Health Personnel , Hepatitis B , Hepatitis B Vaccines , Biomarkers , Serology
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