Consulta: subjectFacets:"Allergy"
Registros recuperados: 9
Data/hora: 09/06/2024 09:20:57

Effect of propolis extract on guines pig lung mast cell
Provedor de dados: 80
Autores: Orsi,R. O.; Sforcin,J. M.; Funari,S. R. C.; Gomes,J. C.
The direct effect of ethanolic extract of propolis on guinea pig lung cell suspension containing mast cells, as well as its influence on the histamine release induced by antigen (ovoalbumin 10 mug/ml) and ionophore A 23187 (3 muM) were investigated. Propolis ethanolic extract (300 mug/ml) increased the histamine release in guinea pig lung suspension containing mast cells by a cytotoxic effect. Lower concentrations of propolis had no effect on histamine release. Our results demonstrated that propolis (3, 10, 30, and 100 mug/ml) shows no significant effect on the histamine release induced by ionophore and antigen. Based on these results, we suggest that propolis could directly activate mast cells, promoting inflammatory mediators release by cytotoxic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mast cells; Allergy; Histamine; Propolis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000100009

Characterization of the allergen Sol gem 2 from the fire ant venom, Solenopsis geminata
Provedor de dados: 80
Autores: Sukprasert,S; Uawonggul,N; Jamjanya,T; Thammasirirak,S; Daduang,J; Daduang,S.
Sol i 2 is a potent allergen in Solenopsis invicta venom, and most humans exhibit reactivity to it. The Sol gem 2 allergen found in the venom of the Thai tropical fire ant Solenopsis geminata was analysed in the present study. The protein was present in higher amounts than other proteins, as determined by SDS-PAGE, and presumably has allergenic properties similar to those of Sol i 2. Sol gem 2 molecular weight is 28 and 15 kDa, respectively, under non-reducing and reducing conditions, indicating that its native form is a dimer. LC-MS/MS analysis confirmed its similarity to Sol i 2. The mono/dimeric form of Sol gem 2 was determined to be relevant by proteomic approach and immunoblotting. An anti-Sol gem 2 antibody was produced in mice, with a titer greater...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allergy; Ant venom; Hymenoptera; Immunoreactivity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000300010

Qualitative and quantitative assessment of mites (Acari) in domiciliary dust in rural dwellings in the "Zona da Mata" region, Minas Gerais, Brazil
Provedor de dados: 104
Autores: Oliveira,Aristeu José de; Daemon,Erik.
From July to September, 2000 (winter), and from January to March, 2001 (summer), 30 dust samples were collected for each season, from beds of rural dwellings located in farms in the geographical area named "Zona da Mata", Minas Gerais, Brazil. After being sorted, the mites were identified and quantified. The prevalence of mites in the samples was 100%. 891 mites were found in winter (22.97%), and 2988 in summer (77.03%). In winter, Dermatophagoides pteronyssinus (Trouessart, 1897) was the most prevalent (55.00%), followed by Blomia tropicalis (Bronswijk, Cock &amp;amp; Oshima, 1973) (27.06%), Euroglyphus maynei (Cooreman, 1950) (8.85%), and predator mites from Cheyletidae family (8.07%). In summer, the most prevalent species was B. tropicalis (47.79%),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Air humidity; Allergens; Allergy; Beds; Countryside; Seasonal variations.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400020

A randomized, pilot trial comparing full versus escalating dose regimens for the desensitization of AIDS patients allergic to sulfonamides
Provedor de dados: 55
Autores: Straatmann,Andrea; Bahia,Fabianna; Pedral-Sampaio,Diana; Brites,Carlos.
Sulfonamides are drugs extensively used in the management of AIDS patients. However, the use of sulfonamides is often associated with the development of allergic reactions, provoking the substitution of the drug (by another that may be less effective); alternatively attempts are made to desensitize the patient. OBJECTIVE: Compare two drug regimens (full vs. escalating doses) for the oral desensitization of AIDS patients allergic to sulfonamides. MATERIAL AND METHODS: AIDS patients with previous allergic reactions to sulfonamides and requiring prophylaxis against Pneumocistis carinii, central nervous system toxoplasmosis and diarrhea caused by Isospora belli were randomly assigned to a group receiving a routine dose of cothrimoxazole, or another that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AIDS; Allergy; Sulfonamides; Oral desensitization.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702002000600002

IgA response in serum and gut secretion in sensitized mice fed with the dust mite Dermatophagoides pteronyssinus extract
Provedor de dados: 56
Autores: Maciel,M.; Fusaro,A.E.; Oliveira,C.R.; Futata,E.A.; Duarte,A.J.S.; Sato,M.N.
Induced oral tolerance to mucosal-exposed antigens in immunized animals is of particular interest for the development of immunotherapeutic approaches to human allergic diseases. This is a unique feature of mucosal surfaces which represent the main contact interface with the external environment. However, the influence of oral tolerance on specific and natural polyreactive IgA antibodies, the major defense mechanism of the mucosa, is unknown. We have shown that oral administration of an extract of the dust mite Dermatophagoides pteronyssinus (Dp) to primed mice caused down-regulation of IgE responses and an increase in tumor growth factor-ß secretion. In the present study, we observed that primed inbred female A/Sn mice (8 to 10 weeks old) fed by gavage a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mucosa; Atural IgA antibodies; Oral tolerance; Cytokines; Allergy; Dermatophagoides pteronyssinus.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000600006

Pharmacological study of anti-allergic activity of Syzygium cumini (L.) Skeels
Provedor de dados: 56
Autores: Brito,F.A.; Lima,L.A.; Ramos,M.F.S.; Nakamura,M.J.; Cavalher-Machado,S.C.; Siani,A.C.; Henriques,M.G.M.O.; Sampaio,A.L.F.
Myrtaceae is a plant family widely used in folk medicine and Syzygium and Eugenia are among the most important genera. We investigated the anti-allergic properties of an aqueous leaf extract of Syzygium cumini (L.) Skeels (SC). HPLC analysis revealed that hydrolyzable tannins and flavonoids are the major components of the extract. Oral administration of SC (25-100 mg/kg) in Swiss mice (20-25 g; N = 7/group) inhibited paw edema induced by compound 48/80 (50% inhibition, 100 mg/kg; P &lt;= 0.05) and, to a lesser extent, the allergic paw edema (23% inhibition, 100 mg/kg; P &lt;= 0.05). SC treatment also inhibited the edema induced by histamine (58% inhibition; P &lt;= 0.05) and 5-HT (52% inhibition; P &lt;= 0.05) but had no effect on platelet-aggregating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Myrtaceae; Syzygium cumini; Allergy; Paw edema; Pleurisy; Cytokine.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000100014

Responses of IgE, IgG1, and IgG4 to concanavalin A-binding Blomia tropicalis antigens in allergic patients
Provedor de dados: 56
Autores: Almeida,K.C.; Silva,D.A.O.; Gennari-Cardoso,M.L.; Cunha-Júnior,J.P.; Alves,R.; Ynoue,L.H.; Resende,R.O.; Sung,S.J.; Taketomi,E.A.
Blomia tropicalis (Bt) and Dermatophagoides pteronyssinus (Dp) are the prevalent house dust mites in tropical countries and are associated with allergic diseases. Glycosylated antigens are highly immunogenic and involved in different pathologies. We evaluated the presence of IgE, IgG1, and IgG4 to concanavalin A-binding antigens (Bt-Con-A) isolated from Bt-total extract in sera of allergic and non-allergic subjects. Bt-total and Bt-Con-A extracts were evaluated by SDS-PAGE and ELISA for reacting with IgE, IgG1, and IgG4 in sera of 121 patients with allergic rhinitis and 36 non-allergic individuals. All subjects were skin prick tested with Bt-total extract and inhibition tests were performed for IgE, IgG1, and IgG4 using both extracts (Bt-total and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allergy; Blomia tropicalis; Concanavalin A; Immunoglobulin E; Immunoglobulin G1; Immunoglobulin G4.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006001100008

Effects of NO/cGMP inhibitors in a rat model of anaphylactoid shock
Provedor de dados: 56
Autores: Albuquerque,A.A.S.; Ferreira,L.G.; Carvalho,M.T.M.; Capellini,V.K.; Evora,P.R.B.; Celotto,A.C.
Anaphylactic shock can be defined as an acute syndrome, and it is the most severe clinical manifestation of allergic diseases. Anaphylactoid reactions are similar to anaphylactic events but differ in the pathophysiological mechanism. Nitric oxide (NO) inhibitors during anaphylaxis suggest that NO might decrease the signs and symptoms of anaphylaxis but exacerbate associated vasodilation. Therefore, blocking the effects of NO on vascular smooth muscle by inhibiting the guanylate cyclase (GC) would be a reasonable strategy. This study aimed to investigate the effects of NO/cGMP pathway inhibitors methylene blue (MB), Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME), and indigo carmine (IC) in shock induced by compound 48/80 (C48/80) in rats. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endothelial cells; Allergy; Rodent; Nitric oxide; Anaphylaxis.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000300606

Immunoglobulin E and systemic lupus erythematosus
Provedor de dados: 56
Autores: Atta,A.M.; Sousa,C.P.; Carvalho,E.M.; Sousa-Atta,M.L.B.
Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by intense polyclonal production of autoantibodies and circulating immune complexes. Some reports have associated SLE with a Th2 immune response and allergy. In the present study 21 female patients with SLE were investigated for total IgE and IgE antibodies to dust house aeroallergens by an automated enzyme-linked fluorescent assay, and were also evaluated for antinuclear IgE autoantibodies by a modified indirect immunofluorescence test using HEp-2 cells as antigen substrate. Additionally, immunocapture ELISA was used to investigate serum anti-IgE IgG autoantibodies. Serum IgE above 150 IU/ml, ranging from 152 to 609 IU/ml (median = 394 IU IgE/ml), was observed in 7 of 21 SLE...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Systemic lupus erythematosus; Antinuclear IgE antibody; Allergy; IgG anti-IgE; IgE.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001000008