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1.
Eur J Immunol ; 2020 Mar 05.
Artigo em Inglês | MEDLINE | ID: mdl-32135578

RESUMO

Exposure to diesel exhaust particles (DEPs) is associated with acute inflammatory responses in the lung and exacerbation of respiratory diseases. However, the mechanism by which DEPs trigger the inflammatory responses remains unclear. Here, we demonstrated that the IFN response factors IRF3 and IRF7 played pivotal roles in DEP-induced pulmonary inflammation. DEPs could not directly induce inflammatory cytokine expression in mouse cells, whereas DEPs triggered autophagy both in vitro and in vivo. The DEP-induced autophagy was augmented in the absence of IRF3 and IRF7, but not in the absence of IFNAR. The expression of Raptor was induced by IRF3 and IRF7 in response to DEPs treatment. Furthermore, administration of the mechanistic target of rapamycin (mTOR) inhibitor alleviated the inflammatory responses in the lung during DEP exposure. Our findings define an IFNAR-independent role of increased autophagy in the absence of IRF3 and IRF7 during pulmonary DEP exposure, and provide the basis to develop new therapeutic approaches to counteract the adverse effects of DEPs and possibly other ambient particulate matters.

2.
Chin Med J (Engl) ; 132(18): 2237-2241, 2019 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-31425355

RESUMO

OBJECTIVE: Chronic rhinosinusitis (CRS) involves inflammation of the nasal and para-nasal mucosa. Due to its heterogeneous nature, unknown pathogenesis, and high recurrence rate, effective treatment is difficult. Nasal cytology is presently not a part of the routine diagnosis or treatment decision for CRS. DATA SOURCES: A literature search was performed for published papers in English between January 1990 and June 2019 using MEDLINE. STUDY SELECTION: Terms used were chronic rhinosinusitis, eosinophils, etiology, immunopathology, inflammation, mast cells, nasal cytology, polyps, and treatment. Both reviews and original articles were collected and studied. RESULTS: There is no standard nasal fluid, mucus sampling, or staining techniques for identifying inflammatory cell types. Results were divergent from different countries. Moreover, the main focus of these papers on the cells in nasal washings was eosinophils, with infrequent mentioning of other cell types that may imply different etiology and pathology. The heterogeneous cell profile of CRS and the role of mast cells have been unappreciated due to the lack of specific immunohistochemical technique or study of its unique mediators. CONCLUSIONS: Nasal cytology could help distinguish the type and the activation state of inflammatory cells. Thus it can help in providing a clearer picture of CRS pathogenesis, identifying different patient groups, and developing effective treatments.

3.
World Allergy Organ J ; 12(1): 100005, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30937130

RESUMO

Background: Allergic rhinitis is the main symptom of pollinosis, relieved by non-specific treatment universally. This study aimed to find the changes of serum metabolites between the seizure and remission periods of pollinosis and provide assistance in the diagnosis and/or therapy. Methods: Metabonomics based on 1H nuclear magnetic resonance (NMR) was used to study the 37 serum samples of pollinosis patients. Results: We believed that the decreased levels of isoleutine, leutine, valine, 3-hydroxybutyric acid, allo-threonine, alanine, methionine, glutamine, lysine, glycine, l-tyrosine, histidine, phenylalanine, lactate, acetate, O-acetylcholine, creatine and creatinine and the increased level of N-acetylglutamine at the seizure stage were statistically significant. Conclusions: Pollinosis could change the metabolic profiles of energy, amino acid and lipid in patients, which might be the diagnosis and/or prognosis markers for hay fever patients.

6.
Mol Med Rep ; 16(3): 2887-2892, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28677761

RESUMO

Platanus acerifolia pollen is considered an important source of airborne allergens in numerous cities. Pla a 1 is a major allergen from P. acerifolia pollen. The present study aimed to express and purify Pla a 1, and to prepare its monoclonal antibody. In the present study, the Pla a 1 gene was subcloned into a pET­28a vector and transformed into the ArcticExpress™ (DE3) RP Escherichia coli host strain. The purified Pla a 1 was then used to immunize BALB/c mice. When serum detection was positive, spleen cells were isolated from the mice and fused with SP2/0 myeloma cells at a ratio of 10:1. Hybridoma cells were screened by indirect ELISA and limiting dilution. Positive cells were used to induce the formation of antibody­containing ascites fluid, and the antibodies were purified using protein A­agarose. The results of the present study demonstrated that recombinant Pla a 1 was successfully expressed and purified, and exhibited positive immunoglobulin E­binding to serum from patients allergic to P. acerifolia. A total of 11 hybridomas that steadily secreted anti­Pla a 1 antibody were obtained and an immunoblotting analysis indicated that all of these monoclonal antibodies specifically recognized the Pla a 1 protein. These results suggested that specific anti­Pla a 1 antibodies may be obtained, which can be used for the rapid detection of Pla a 1 allergens and in the preparation of vaccines against P. acerifolia pollen.


Assuntos
Anticorpos Monoclonais/imunologia , Antígenos de Plantas/genética , Antígenos de Plantas/imunologia , Clonagem Molecular/métodos , Adolescente , Adulto , Animais , Antígenos de Plantas/isolamento & purificação , Linhagem Celular , Escherichia coli/genética , Feminino , Vetores Genéticos/genética , Humanos , Imunoglobulina E/imunologia , Magnoliopsida/genética , Magnoliopsida/imunologia , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Pólen , Proteínas Recombinantes/genética , Proteínas Recombinantes/imunologia , Proteínas Recombinantes/isolamento & purificação , Rinite Alérgica/imunologia , Rinite Alérgica Sazonal/imunologia , Adulto Jovem
7.
Mol Med Rep ; 16(3): 2851-2855, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28656246

RESUMO

Platanus acerifolia (P. acerifolia) is an important cause of pollinosis in cities. The use of allergen extracts on patients with allergic diseases is the most commonly applied method to attempt to treat pollinosis. Pla a 3, a non­specific lipid transfer protein, is a major allergen present in P. acerifolia pollen extracts. In the present study, the Pla a 3 gene was sub­cloned into a pSUMO­Mut vector using Stu I and Xho I sites and transformed into the Arctic Express™ (DE3) RP E. coli host strain. The purified Pla a 3 allergen was analyzed by western blotting and the results revealed that the Pla a 3 allergen has the ability to bind IgE in the P. acerifolia pollen of allergic patients' sera. Moreover, the authors predicted the potential B cell epitopes of the Pla a 3 allergen using the DNAStar Protean system, the Bioinformatics Predicted Antigenic Peptides system and the BepiPred 1.0 server. In addition, the T cell epitopes were predicted by the SYFPEITHI database and the NetMHCII­2.2 server. As a result, two B cell epitopes (35­45 and 81­86) and four potential T cell epitopes including 2­15, 45­50, 55­61 and 67­73 were predicted in the present study. The current results can be used to contribute to allergen immunotherapies and useful in peptide­based vaccine designs of pollen allergy.


Assuntos
Epitopos de Linfócito B/imunologia , Epitopos de Linfócito T/imunologia , Imunoglobulina E/imunologia , Magnoliopsida/imunologia , Rinite Alérgica Sazonal/imunologia , Adolescente , Adulto , Antígenos de Plantas/química , Antígenos de Plantas/genética , Antígenos de Plantas/imunologia , Antígenos de Plantas/isolamento & purificação , Clonagem Molecular , Epitopos de Linfócito B/química , Epitopos de Linfócito B/genética , Epitopos de Linfócito B/isolamento & purificação , Epitopos de Linfócito T/química , Epitopos de Linfócito T/genética , Epitopos de Linfócito T/isolamento & purificação , Escherichia coli/genética , Feminino , Humanos , Imunoglobulina E/sangue , Magnoliopsida/química , Magnoliopsida/genética , Masculino , Pessoa de Meia-Idade , Modelos Moleculares , Pólen/química , Pólen/genética , Pólen/imunologia , Conformação Proteica , Rinite Alérgica Sazonal/sangue , Adulto Jovem
8.
Biomed Res Int ; 2015: 428169, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26075239

RESUMO

In 1997, the first monoclonal antibody (MoAb), the chimeric anti-CD20 molecule rituximab, was approved by the US Food and Drug administration for use in cancer patients. Since then, the panel of MoAbs that are approved by international regulatory agencies for the treatment of hematopoietic and solid malignancies has continued to expand, currently encompassing a stunning amount of 20 distinct molecules for 11 targets. We provide a brief scientific background on the use of MoAbs in cancer therapy, review all types of monoclonal antibodies-related adverse events (e.g., allergy, immune-related adverse events, cardiovascular adverse events, and pulmonary adverse events), and discuss the mechanism and treatment of adverse events.


Assuntos
Anticorpos Antineoplásicos/uso terapêutico , Neoplasias/tratamento farmacológico , Rituximab/uso terapêutico , Anticorpos Antineoplásicos/efeitos adversos , Humanos , Rituximab/efeitos adversos
9.
Biomed Res Int ; 2015: 421716, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26064909

RESUMO

PURPOSE: To survey the species diversity of home dust mites (HDM) in Xishuangbanna, a tropical rainforest region in Southwest China. METHODS: From August 2010 to January 2011, mite-allergic patients and healthy controls were invited to participate. Dust samples from the patients' homes were collected, and mites in the samples were isolated. Permanent slides were prepared for morphologically based species determination. RESULTS: In total, 6316 mite specimens of morphologically identifiable species were found in 233 dust samples taken from 41 homes. The result shows that the mite family of Pyroglyphidae occupied the highest percentage of the total amount of mites collected, followed by Cheyletidae family. The most common adult Pyroglyphidae mites were Dermatophagoides (D.) farinae, D. pteronyssinus, and D. siboney. The most common mites found from other families were Blomia tropicalis, Tyrophagus putrescentiae, and Aleuroglyphus ovatus. Four main allergenic dust mite species D. farinae, D. pteronyssinus, D. siboney, and Blomia tropicalis were found to be coinhabiting in 6/41 homes. CONCLUSION: The HDM population in homes in Xishuangbanna, a tropical rainforest region in Southwest China, has its own characteristics. It has rich dust mite species and the dust mite densities do not show significant variation across seasons.


Assuntos
Alérgenos/isolamento & purificação , Asma/etiologia , Pyroglyphidae/genética , Alérgenos/genética , Animais , Asma/genética , Asma/fisiopatologia , China , Humanos , Pyroglyphidae/classificação , Pyroglyphidae/patogenicidade , Floresta Úmida , Estações do Ano , Especificidade da Espécie
10.
Biomed Res Int ; 2015: 429534, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26064911

RESUMO

OBJECTIVE: To analyze the clinical characteristics of inpatients with anaphylaxis and the factors that influenced those characteristics. METHODS: Using the patient records from 1990 to 2013 from three highly ranked Chinese hospitals, we retrospectively analyzed the characteristics of 108 inpatients with anaphylaxis (not anaphylaxis admitted). RESULTS: The mean patient age was 42 ± 20 years old and male-to-female ratio was 1 : 1.3. The number of patients with anaphylaxis increased gradually, and cases diagnosed after 2005 accounted for 68.5% of the 108 total cases. The most common trigger was medications. The most common clinical manifestations included cutaneous, nervous, respiratory, circulatory, and digestive signs and symptoms. Male patients were more likely to experience loss of consciousness. Multisystem involvement was more likely to develop in patients with low BP, whereas it was uncommon in those with anaphylaxis induced by antibiotics or anesthetics. Epinephrine was used as the first-line treatment for 56 cases. CONCLUSIONS: Inpatient with anaphylaxis was more common in female patients and the number increased gradually during the study period. The most common trigger was medications. Patients with low BP were prone to having multisystem involvement, whereas the cases of anaphylaxis induced by antibiotics and anesthetics were less likely to involve multiple organ systems.


Assuntos
Anafilaxia/tratamento farmacológico , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/tratamento farmacológico , Epinefrina/administração & dosagem , Hipotensão/tratamento farmacológico , Adolescente , Adulto , Idoso , Anafilaxia/induzido quimicamente , Anafilaxia/fisiopatologia , Pressão Sanguínea , Criança , Pré-Escolar , China , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/fisiopatologia , Feminino , Frequência Cardíaca , Humanos , Hipotensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , Fatores de Risco
11.
Biomed Res Int ; 2015: 179426, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26000282

RESUMO

Artemisia is the most important outdoor allergen throughout China. It can cause allergic rhinitis, asthma, or both of them. Since it was verified as an allergenic pollen in 1960, it was identified two times in the Chinese National Pollen Survey (1984, 2009). The first oral immunotherapy double-blinded trial for Artemisia pollen asthma research was conducted in China in 1989 and published in 1990. 40 years since that study, there have been many published research reports on Chinese Artemisia allergy. This review summarizes the information regarding the discovery of Artemisia as an allergenic pollen, pollen account, epidemiology, allergen components, immunological changes in hay fever patients, natural course from rhinitis to asthma, diagnosis, and immunotherapies in China.


Assuntos
Artemisia/efeitos adversos , Pesquisa Biomédica , Hipersensibilidade/imunologia , China/epidemiologia , Humanos , Hipersensibilidade/diagnóstico , Hipersensibilidade/epidemiologia , Hipersensibilidade/terapia , Imunoterapia , Pólen/efeitos adversos
12.
Biomed Res Int ; 2015: 187620, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26000283

RESUMO

AIM: To investigate differences in the efficacy of sublingual immunotherapy with Dermatophagoides farinae drops in monosensitized and polysensitized allergic rhinitis patients. METHODS: The patients enrolled in the study were treated for more than one year by sublingual immunotherapy (SLIT) using Dermatophagoides farinae drops and were divided into a monosensitized group (n = 20) and a polysensitized group (n = 30). Total nasal symptom scores of patients before and after SLIT were analyzed to evaluate the curative effect. The phylogenetic tree of dust mite allergens as well as other allergens that were tested by skin prick test was constructed to help the analysis. RESULTS: There was no significant difference in the efficacy of SLIT between dust mite monosensitized and polysensitized patients. CONCLUSIONS: Both dust mite monosensitized and polysensitized patients could be cured by SLIT using Dermatophagoides farinae drops. This study provides a reference for the selection of allergens to be used in immunotherapy for polysensitized AR patients.


Assuntos
Antígenos de Dermatophagoides/imunologia , Dermatophagoides farinae/imunologia , Imunização , Rinite Alérgica/imunologia , Rinite Alérgica/terapia , Imunoterapia Sublingual , Animais , Reações Cruzadas/imunologia , Relação Dose-Resposta Imunológica , Humanos , Filogenia , Testes Cutâneos , Resultado do Tratamento
13.
Allergy Asthma Immunol Res ; 7(1): 92-4, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-25553269

RESUMO

A novel delayed anaphylactic reaction to red meat, associated with tick bites and IgE antibodies against galactose-α-1, 3-galactose (α-gal), was reported in 2009 in the US, Australia and Europe. In this case, serum specific IgE to galactose-α-1, 3-galactose (>100 kU/L) and IgE to multiple non-primate mammalian proteins were positive. However, the pathogenesis of this disease remains unclear. We report the first case in Asia of delayed anaphylactic reaction to red meat, which was induced by bites from the hard tick, Hematophagous ixodidae. We confirmed the increased concentration of IgE reactive epitopes in non-primate mammalian organs, which may be rich in α-gal proteins in lymphatic and endothelial tissues. All confirmed ticks associated with this disorder in the literature and in our case belonged to the hard tick family. We hypothesize that hard tick saliva is enriched with blood-type substances, such as oligosaccharides, from the non-primate mammal victim's blood after days to weeks of blood sucking, which sensitizes humans through the injection route while blood sucking.

14.
Allergy Asthma Immunol Res ; 6(3): 257-62, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24843802

RESUMO

A significant-source of allergens come from house dust that contain particles derived from arthropods, molds, and pet dander. This study evaluated mite and booklouse fauna from vacuumed dust samples in Beijing China (a temperate zone). Our survey was carried out in Beijing in the homes of mite allergic patients who visited our Allergy Department. In total, 38 homes were selected for the collection of dust samples by vacuuming, from December 2008 to January 2010. The flotation method was used to isolate mites from house dust. Permanent slides were prepared for mite specimens and mites were identified and counted under a microscope. In total, 1,798 separate mite and insect specimens were found in 345 dust samples taken from 38 homes. A total of 95 individual Dermatophagoides (D) siboney were detected in 35 dust samples from 19 homes (representing 5.3% of all mite and insect species found in house dust); in addition, this mite was found to co-exist with D. farinae (Hughes, 1961) in 33 dust samples. Our results demonstrated the presence D. siboney that co-existed with D. farinae in house dust in Beijing China (a temperate zone).

15.
J Med Entomol ; 50(1): 31-6, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23427649

RESUMO

Even though house dust mites are one of the most important allergens, there have been few studies in China for their identification and diversity. In this study, we reported that Dermatophagoides siboney was found for the first time in Beijing, China, in a temperate zone and it was also the first reported in Asia. This survey of mite prevalence was carried out in several districts of Beijing, a city of thirty million people. House dust samples were collected from 38 homes of mite-allergic patients who visited our Allergy Department from December 2008 to January 2010. Out of 345 house dust samples collected, 64% contained mites. Dermatophagoides farinae was the predominant species in the mite population found and Dermatophagoides pteronyssinus was second, and Dermatophagoides siboney was the third. The positive rates of samples were higher in single-story homes and lower buildings. The seasonal density distribution of house dust mites showed the highest mite concentration in September through October, followed by May through July, December to next January; and lowest in March and November.


Assuntos
Biodiversidade , Pyroglyphidae , Animais , China , Habitação/estatística & dados numéricos , Humanos , Densidade Demográfica , Pyroglyphidae/classificação
16.
Chin Med Sci J ; 24(2): 86-90, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19618604

RESUMO

OBJECTIVE: To evaluate the significance of several Dermatophagoides pteronyssinus allergen extracts for skin prick test (SPT) in patients allergic to Dermatophagoides pteronyssinus. METHODS: Two hundred and nineteen patients enrolled in Peking Union Medical College Hospital underwent SPT and serum specific IgE assay to detect the Dermatophagoides pteronyssinus allergen. Three kinds of house dust mite allergen extracts were used for SPT, including the Dermatophagoides pteronyssinus extract prepared by our laboratory (group A), standardized Dermatophagoides pteronyssinus extract (group B), and mixed extracts of Dermatophagoides pteronyssinus and Dermatophagoides farinae (group C). Human serum specific IgE result was regarded as the reference standard for diagnosis of Dermatophagoides pteronyssinus allergy. The receiver operating characteristic (ROC) curve was used to evaluate the diagnostic performance of SPT with the extracts of three groups. RESULTS: SPT results showed that the median wheal diameter of group A, group B, and group C was 0.43, 0.35, and 0.28 cm, respectively, with significant difference among three groups (P<0.05). The difference was significant between group A and B (P<0.01) as well as group A and C (P<0.01), but not between group B and C (P>0.05). There was no local urticaria or systemic allergic reactions following the procedure of SPT. Local reaction was observed in 5 patients and delayed reaction was in 2 patients of group A. As for group B and C, local reaction occurred in 3 cases and delayed reaction in 2 cases in each group. The area under ROC curve of SPT with extract in group A, group B, and group C was 0.765, 0.801, and 0.782, respectively. Based on the detection results of serum specific IgE, the sensitivity of SPT in diagnosis of Dermatophagoides pteronyssinus allergy with extract of group A, group B, and group C was 92.4%, 87.0%, and 81.5%, and the specificity was 60.6%, 73.2%, and 74.8%, respectively. CONCLUSION: The Dermatophagoides pteronyssinus extract for SPT prepared by our laboratory offers good sensitivity and specificity comparable to commercially available allergen extracts, and it may be an appropriate candidate for clinical screening and diagnosis of Dermatophagoides pteronyssinus allergy.


Assuntos
Antígenos de Dermatophagoides , Dermatophagoides pteronyssinus/imunologia , Testes Cutâneos/métodos , Animais , Antígenos de Dermatophagoides/imunologia , Feminino , Humanos , Masculino , Curva ROC , Sensibilidade e Especificidade
17.
Chin Med Sci J ; 24(1): 64-8, 2009 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-19382428

RESUMO

OBJECTIVE: To explore an effective method of Dermatophagoides pteronyssinus protein extraction suitable for two-dimensional electrophoresis (2-DE) analysis. METHODS: The extracts of Dermatophagoides pteronyssinus were prepared with Coca's solution, lysis buffer of 2-DE, and Trizol reagent, respectively. Bicinchoninic acid (BCA) assay was used to determine the total protein concentration of the samples. The efficiency of different protein extraction methods were evaluated with 2-DE analysis. RESULTS: The concentrations of extracted protein by methods of Coca's solution, lysis buffer, and Trizol reagent were 0.63 g/L, 0.90 g/L, and 0.80 g/L, respectively. The 2-DE analysis results showed that some protein spots in low molecular weight (LMW) range could be detected with the Coca's solution method. With the lysis buffer of 2-DE method, more protein spots in LMW range could be detected, while the medium molecular weight (MMW) protein spots were absent. Several MMW protein spots (174-178 kD and 133 kD) and more LMW protein spots were detected with Trizol reagent method. CONCLUSIONS: Among Coca's solution, lysis buffer of 2-DE, and Trizol reagent, the concentration of extracted protein of Dermatophagoides pteronyssinus by lysis buffer of 2-DE is the highest. However, most protein components of Dermatophagoides pteronyssinus purified mite bodies can be extracted by Trizol reagent, which may generally reflect the whole profile of Dermatophagoides pteronyssinus allergens.


Assuntos
Dermatophagoides pteronyssinus/química , Proteínas/isolamento & purificação , Alérgenos/isolamento & purificação , Animais , Eletroforese em Gel Bidimensional , Guanidinas/química , Fenóis/química
18.
Chin Med Sci J ; 20(1): 27-9, 2005 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15844308

RESUMO

OBJECTIVE: To explore the effects of SDS, PBS re-dissolvent solutions on fluorescence values of radioallergosorbent test (RAST) inhibition. METHODS: Dermatophagoides pterronyssinus allergen immunoCAP and UniCAP 100 System were used. The Sera Pool consisted of 20 Dermatophagoides pterronyssinus allergic patients sera, their specific IgE fluorescence values were between 12505 and 24776. RESULTS: Fluorescence value percentages decreased: 62.9%, 54.1%, 43.5%, 6.7%, 3.7%, 2.6%, 2.2%, and 1.4% respectively, when SDS concentrations were at 2%, 1%, 0.5%, 0.25%, 0.1%, 0.05%, 0.025%, and 0.01%. Fluorescence values decreased more than 5% with SDS concentrations equal to 0.25% or higher. PBS in 0.1 and 0.01 mol/L concentrations decreased fluorescence values 2.9% and 0.9% respectively. CONCLUSIONS: SDS is a commonly used surfactants in allergen extract and re-dissolvent prepared allergen precipitation for RAST inhibition. Thus effects of surfactants (e.g. SDS) upon the RAST inhibition tests must be considered when they were used as re-dissolvent agents to improve protein resolution in RAST inhibition.


Assuntos
Dermatophagoides pteronyssinus/imunologia , Fosfatos/administração & dosagem , Teste de Radioalergoadsorção/métodos , Dodecilsulfato de Sódio/administração & dosagem , Tensoativos/administração & dosagem , Alérgenos , Relação Dose-Resposta a Droga , Fluorescência , Humanos , Imunoglobulina E/sangue , Imunoglobulina E/imunologia , Fosfatos/farmacologia , Dodecilsulfato de Sódio/farmacologia , Soluções , Tensoativos/farmacologia
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