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OBJECTIVE@#To investigate the effects of dasatinib on the maturation of monocyte-derived dendritic cells (moDCs) derived from healthy donors (HDs) and chronic myelogenous leukemia (CML) patients.@*METHODS@#Peripheral blood mononuclear cells (PBMCs) were isolated from HDs (n=10) and CML patients (n=10) who had got the remission of MR4.5 with imatinib treatment. The generation of moDCs from PBMCs was completed after 7 days of incubation in DC I culture medium, and another 3 days of incubation in DC II culture medium with or without 25 nmol/L dasatinib. On the 10th day, cells were harvested and expression of molecules of maturation related marker were assessed by flow cytometry. The CD80+CD86+ cell population in total cells was gated as DCs in the fluorescence-activated cell storting (FACS) analyzing system, then the expression of CD83, CD40 or HLA-DR in this population was analyzed respectively.@*RESULTS@#The proportion of CD80+CD86+ cells in total cells didn't show a statistical difference between HD group and patient group (89.46%±9.70% vs 87.39%±9.34%, P=0.690). Dasatinib significantly enhanced the expression of the surface marker CD40 (P=0.008) and HLA-DR (P=0.028) on moDCs derived from HDs compared with the control group, while the expression of CD83 on moDCs didn't show a significant difference between dasatinib group and the control group (P=0.428). Meanwhile, dasatinib significantly enhanced the expression of the surface marker CD40 (P=0.023), CD83 (P=0.038) and HLA-DR (P=0.001) on moDCs derived from patients compared with the control group.@*CONCLUSION@#For CML patients, the same high proportion of moDCs as HDs can be induced in vitro, which provides a basis for the application of DC-based immunotherapy strategy. Dasatinib at the concentration of 25 nmol/L can efficiently promote the maturation of moDCs derived from HDs and CML patients in vitro. Dasatinib shows potential as a DC adjuvant to be applied in DC-based immunotherapy strategies, such as DC vaccine and DC cell-therapy.
Subject(s)
Humans , Cell Differentiation , Cells, Cultured , Dasatinib/pharmacology , Dendritic Cells , HLA-DR Antigens/pharmacology , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism , Leukocytes, Mononuclear , MonocytesABSTRACT
Crassostrea sikamea (C.sikamea) is an important edible and medicinal seafood in China. In the present study, a compound named flazin was separated and identified from the ethyl acetate extract of C.sikamea (EAECs) for the first time. In addition, the 3-(4, 5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetra zolium (MTS) assay revealed that EAECs and flazin inhibited the transformation of splenic lymphocytes in vitro. Moreover, flazin (20 μg·mL
Subject(s)
Animals , Rats , Carbolines , Crassostrea , Furans , Lymphocytes , Rats, Sprague-Dawley , SpleenABSTRACT
Bacillus toyonensis is a probiotic microorganism that for decades has been used in animal nutrition around the world. The objective of this work was to evaluate the immunomodulatory effect of oral B. toyonensis supplementation in dogs vaccinated against canine parvovirus. Puppies were randomly selected and divided in two groups, one received B. toyonensis at a concentration of 2x10 8 viable spores per day and another group without supplementation was left as control. The puppies were vaccinated against canine parvovirus type 2. B. toyonensis supplementation was efficient in stimulating specific IgG for parvovirus with titers of 2, 3, and 2.5-fold higher than controls at 7, 21, and 35 pos-vaccination days respectively. Peripheral blood mononuclear cells (PBMCs) from dogs were cultured and stimulated with B. toyonensis DNA, vegetative cell and spores. The mRNA transcription of cytokines IL-4, IL-17, and IFN-γ up modulated by the stimuli. Thus, we conclude in this study that B. toyonensis supplementation may amplify the vaccine immune response against canine parvovirus.(AU)
Bacillus toyonensis é um micro-organismo probiótico que há décadas é utilizado na nutrição animal em todo o mundo. O objetivo deste trabalho foi avaliar o efeito imunomodulador da suplementação oral de B. toyonensis em cães vacinados contra o parvovírus canino. Os filhotes foram selecionados aleatoriamente e divididos em dois grupos, um recebeu B. toyonensis na concentração de 2 × 10 8 esporos viáveis por dia e outro grupo sem suplementação como controle. Os filhotes foram vacinados contra o parvovírus canino tipo 2. A suplementação com B. toyonensis foi eficiente em estimular IgG específica para parvovírus com títulos de 2, 3 e 2,5 vezes maior que os controles aos 7, 21 e 35 dias pós-vacinação, respectivamente. Células mononucleares do sangue periférico (PBMCs) de cães foram cultivadas e estimuladas com DNA de B. toyonensis, células vegetativas e esporos. A transcrição do mRNA das citocinas IL-4, IL-17 e IFN-γ foi modulada pelos estímulos. Assim, concluímos neste estudo que a suplementação com B. toyonensis pode amplificar a resposta imune da vacina contra o parvovírus canino.(AU)
Subject(s)
Animals , Dogs , Bacillus , Vaccines , Parvovirus, Canine , Probiotics , Immunologic FactorsABSTRACT
Resumen La evidencia actual es limitada para determinar el impacto del uso de los inhibidores de la enzima convertidora de angiotensina (IECA) en la predisposición al empeoramiento de la enfermedad del coronavirus 2019 (COVID-19). Inicialmente se reportó que en los pacientes con progresión grave de la COVID-19 existía una mortalidad elevada, los cuales tenían antecedentes de hipertensión arterial, diabetes mellitus, enfermedad cardiovascular y enfermedad renal crónica. Parte de estos pacientes también tenía en común que utilizaban IECA, lo cual alertó a la comunidad médica sobre su riesgo potencial en coexistencia con COVID-19. Sin embargo, estudios más recientes de casos-controles encontraron que los inhibidores del sistema renina-angiotensina, incluyendo los IECA, no incrementan el riesgo de COVID-19 o de requerir admisión hospitalaria por esta causa. Diferentes revistas científicas han facilitado el acceso a reportes preliminares, dejando a discreción de la comunidad médica y científica hacer uso de dicha información para promover el desarrollo de estudios que confirmen experimentalmente dichos hallazgos, preclínicos y epidemiológicos, que finalmente impacten en las decisiones de la práctica clínica para beneficiar a los pacientes con COVID-19. En esta revisión de la literatura se exploran los diferentes efectos mediados por los IECA que podrían estar relacionados con la respuesta inmune durante la infección y la transmisión de COVID-19, compilando evidencia disponible que evalúa si en realidad representan un riesgo o si, por el contrario, confieren un efecto protector.
Abstract There is limited evidence for determining the impact of the use of angiotensin converting enzyme inhibitors (ACE-I) in the tendency to worsening of coronavirus-19 disease (COVID-19). It was initially reported that, in patients with serious progression of COVID-19, there was an increased mortality in those that had a history of suffering arterial hypertension, diabetes mellitus, cardiovascular disease, and chronic kidney disease. A proportion of these patients also had in common that they used ACE-I, which alerted the medical community on the potential risk in coexisting with COVID-19. However, in more recent case-control studies, they found that inhibitors of the renin-angiotensin system, including ACE-I, does not increase the risk of COVID-19 or require hospital admission due to this cause. Several scientific journals have provided access to preliminary reports, leaving the use of such information at the discretion of the medical and scientific community for promoting the development of studies that might confirm these preclinical and epidemiological findings experimentally. These may finally have an impact on the clinical practice decisions, in order to benefit patients with COVID-19. In this literature review, the different effects mediated by ACE-I that could be related to the immune response during the infection and transmission of COVID-19 are examined, gathering available evidence that evaluates whether, in reality, they represent a risk or if on the other hand, they confer a protector effect.
Subject(s)
Humans , Male , Female , Angiotensin-Converting Enzyme Inhibitors , COVID-19 , Renin-Angiotensin System , Cardiovascular Diseases , Heart Disease Risk Factors , ImmunityABSTRACT
Background: Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis, which has posed a constant challenge to mankind in its treatment due to increasing resistance and longer duration of treatment. The newer approach is to look towards strengthening host immune system along with suppressing the organism. Aim of the study was to assess the existence of Vitamin D deficiency in TB patients and aid in the strategies and development of newer improvised approaches in the treatment of TB. Objectives of the study was to estimate vitamin D levels in Tuberculosis (pulmonary and extrapulmonary) patients, assess Correlation between vitamin D and pulmonary tuberculosis and to assess correlation between Vitamin D and extrapulmonary Tuberculosis.Methods: This is a descriptive cross-sectional study. The study consisted of 80 tuberculosis patients both extrapulmonary and pulmonary. Blood samples was analysed for Vitamin D levels and results were compared with age and sex matched controls. Results was analysed using SPSS software.Results: The cases included patient in the age group of 18-60 year with the mean age being 42.34�.65 year. Of the 80 tuberculosis patients 42 were diagnosed with pulmonary tuberculosis and 38 constituted extrapulmonary tuberculosis. The mean Vitamin D in cases was 24.82�.33 and controls was 34.41�19. Among the cases 25 (31.3%) subjects had Vitamin D levels <20 pg/ml and none of the controls had levels <20 pg/ml. The mean Vitamin D level in pulmonary Tb patients was found to be 24.29�.86 pg/ml and Extra-pulmonary Tb was 25.40�.96 pg/ml. The unpaired t-test was statistically significant with p value of 0.005.Conclusions: This study has emphasized on the presence of nutritional deficiency in TB patients and necessity to correct them to achieve a better cure rate.
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Abstract Biflorin (6,9-dimethyl-3-(4-methylpent-3-en-1-yl) benzo[de]chromene-7,8-dione) is a promising substance that has been increasingly studied in the past decades due to its diverse pharmacological properties (i.e. antitumor, antioxidant, antiinflamatory, antimicrobial activity etc.). Aiming the comprehension of its antitumoral activity we investigated the cell proliferation and cytotoxicity habilities of biflorin against mice splenocytes Balb/c. Biflorin was able to stimulate mice splenocytes Balb/c in 48 h of incubation at a concentration of 20.2 µM. Its immunostimulation promoted the production of cytokines such as: TNF-α, IFN-γ, IL-2, IL-6 and IL-17, inducing the immune profile toward a Th1 response. Moreover, an original method which led to an excellent yield with less processing time compared to the methods described in the literature was developed to obtain biflorin, from sawdust of Capraria biflora L., Scrophulariaceae. This method shows a great potential of increasing the production of this pharmacological active compound.
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Immune disorders are common in critically ill patients. Catecholamines play a crucial role in theimmune regulation and modulation. Immune cells can synthesize catecholamines and express adrenergic receptors. Catecholamine has a wide-ranging regulatory effect on innate immunity such as neutrophils, monocyte macrophages, dendritic cells, natural killer cells, and lymphocyte-mediated acquired immunity. Catecholamines exert different immunomodulatory effects by binding to α receptors, β receptors, and dopamine receptor subtypes on immune cells. In-depth study of the effect and mechanism of catecholamine on immune function in critically ill patients will provide new ideas for the prevention and treatment of immune dysfunction in critical illness.
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Immune disorders are common in critically ill patients. Catecholamines play a crucial role in theimmune regulation and modulation. Immune cells can synthesize catecholamines and express adrenergic receptors. Catecholamine has a wide-ranging regulatory effect on innate immunity such as neutrophils, monocyte macrophages, dendritic cells, natural killer cells, and lymphocyte-mediated acquired immunity. Catecholamines exert different immunomodulatory effects by binding to α receptors, β receptors, and dopamine receptor subtypes on immune cells. In-depth study of the effect and mechanism of catecholamine on immune function in critically ill patients will provide new ideas for the prevention and treatment of immune dysfunction in critical illness.
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Objective:To prepare Lycii Fructus polysaccharide buccal tablets and investigate its immunomodulatory effect. Method:Taking the appearance, taste, hardness and disintegration time of the tablets as comprehensive evaluation index, based on single factor tests, central composite design-response surface methodology was adopted to optimize the prescription of Lycii Fructus polysaccharide buccal tablets with mass ratio of dextrin to mannitol, mass ratio of cyclamate to malic acid and dosage of sodium carboxymethyl starch (CMS-Na) as factors. Kunming mice were randomly divided into 5 groups, namely the Lycii Fructus polysaccharide buccal tablets low (100 mg·kg-1·d-1), medium (200 mg·kg-1·d-1) and high (300 mg·kg-1·d-1) dose groups, the normal group (0.9% normal saline, 300 mg·kg-1·d-1) and the positive medicine group (Cinengsu group, 300 mg·kg-1·d-1). The immunomodulatory effect of the buccal tablets were investigated by calculating immune organ index, monocyte-macrophage phagocytic index, serum hemolysin antibody level, and the voix pedis thickness difference of delayed hypersensitivity (DTH) of mice. Result:Optimal prescription for the buccal tablets was 80% of Lycii Fructus extract, 11.5% of dextrin-mannitol (1.2:1), 1% of cyclamate-malic acid (1:1), 0.5% of cream essence, 6.5% of CMS-Na, 0.5% of magnesium stearate, and appropriate amount of 80% ethanol. Under the optimal condition, the hardness of the buccal tablets was 11.83 kg, its disintegration time was 13.21 min, both of which were in line with the relevant provisions of the 2015 edition of Chinese Pharmacopoeia, and the buccal tablets had good appearance and taste. Compared with the normal group, medium and high dose groups of Lycii Fructus polysaccharide buccal tablets significantly increased thymus index, spleen index and phagocytic index of mice (PPPPPConclusion:The formulation process of the buccal tablets optimized by central composite design-response surface methodology is stable and feasible, and Lycii Fructus polysaccharide buccal tablets can improve the immune regulation function of normal mice, and this study can provide experimental basis for the development, utilization and clinical application of Lycii Fructus and Lycii Fructus polysaccharides.
ABSTRACT
Immune disorders are common in critically ill patients. Catecholamines play a crucial role in theimmune regulation and modulation. Immune cells can synthesize catecholamines and express adrenergic receptors. Catecholamine has a wide-ranging regulatory effect on innate immunity such as neutrophils, monocyte macrophages, dendritic cells, natural killer cells, and lymphocyte-mediated acquired immunity. Catecholamines exert different immunomodulatory effects by binding to α receptors, β receptors, and dopamine receptor subtypes on immune cells. In-depth study of the effect and mechanism of catecholamine on immune function in critically ill patients will provide new ideas for the prevention and treatment of immune dysfunction in critical illness.
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Objective: To evaluate the in vitro and in vivo effect of the Algerian propolis ethanolic extract (EEP) against Echinococcus granulosus (E. granulosus) infection. Methods: In vitro scolicidal activity of EEP was investigated on the protoscolices of hydatid cyst. This in vitro study was conducted by using an in vivo assay. BALB/c mice were inoculated with E. granulosus and treated with propolis for three months. Hydatid cysts development was assessed. Nitric oxide (NO), tumor necrosis factor alpha (TNF-α) production and inducible NO synthase, NF-κB, and TNF-α spleen expression were estimated by Griess method and immunofluorescence respectively. Results: Our study revealed that EEP has a high scolicidal activity against E. granulosus. Oral administration of EEP decreased TNF-α, NF-κB and inducible NO synthase expression in the spleen tissues in the CE+EEP group, in comparison with the CE group. Concomitantly, EEP treatment caused an important systemic decrease in NO and TNF-α levels. These findings are associated with the reduction of CE development. Conclusions: This is the first report demonstrating with interest the antihydatic and immunomodulatory effects of the Algerian EEP, suggesting its therapeutic potential for the hydatid disease treatment.
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Objective: To evaluate the in vitro and in vivo effect of the Algerian propolis ethanolic extract (EEP) against Echinococcus granulosus (E. granulosus) infection. Methods: In vitro scolicidal activity of EEP was investigated on the protoscolices of hydatid cyst. This in vitro study was conducted by using an in vivo assay. BALB/c mice were inoculated with E. granulosus and treated with propolis for three months. Hydatid cysts development was assessed. Nitric oxide (NO), tumor necrosis factor alpha (TNF-α) production and inducible NO synthase, NF-κB, and TNF-α spleen expression were estimated by Griess method and immunofluorescence respectively. Results: Our study revealed that EEP has a high scolicidal activity against E. granulosus. Oral administration of EEP decreased TNF-α, NF-κB and inducible NO synthase expression in the spleen tissues in the CE+EEP group, in comparison with the CE group. Concomitantly, EEP treatment caused an important systemic decrease in NO and TNF-α levels. These findings are associated with the reduction of CE development. Conclusions: This is the first report demonstrating with interest the antihydatic and immunomodulatory effects of the Algerian EEP, suggesting its therapeutic potential for the hydatid disease treatment.
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Objective To evaluate the immunomodulatory effect of Haishen-Xiyangshen-Gouqizi Koufuye(HXGK),an oral liquid of healthy food product,on the immunocompromised mouse model. Methods The cytotoxicity was assayed by the MTT method using murine monocyte macrophagse Raw264.7 cells. The in vitro phagocytic activity of RAW264.7 cells was assayed by the colorimet-ric neutral red phagocytosis test. In the in vivo mouse test,animals were randomized into six groups,each with ten mice:the normal control,model control,positive control groups and three HXGK(5,10,and 20 ml/kg)test groups. The immunocompromised mouse model was created by the intraperitoneal injection of 40 mg/kg dexamethasone once every other day for a total of five times. After first time injection of dexamethasone,the normal control(without the dexamethasone injection)and model control groups were adminis-tered orally once a day with saline,the positive control group with 25 mg/kg levamisole,and the three test groups with 5,10 and 20 ml/kg HXGK,respectively,for a total of 21 days. Then the carbon particle clearance index,the spleen and thymus indices,and the leukocytes,lymphocytes,IgG and IgA in peripheral blood were measured respectively. Results Compared with the normal control, HXGK significantly enhanced the phagocytic index of RAW264.7 cells from 1.00 to 1.12(P<0.01)and 1.32(P<0.01)at the 100-and 20-fold diluted dosages,respectively,in the in vitro neutral red phagocytosis test. In the in vivo mouse test,compared with the model control group,HXGK at the doses of 5,10 and 20 ml/kg obviously increased the carbon particle clearance index about 1.8(P<0.01),1.5(P<0.05)and 1.7-fold(P<0.05)and improved the spleen index from 1.60 to 2.96(P<0.01),2.56(P<0.01)and 2.32(P<0.05),the thymus index from 1.31 to 1.46,1.59(P<0.05)and 1.71(P<0.05),respectively. Meanwhile,HXGH at the 5,10 and 20 ml/kg dosages also increased the leukocytes about 1.32,1.75(P<0.05)and 1.46 folds(P<0.05),the lymphocytes about 16 (P<0.01),20(P<0.01)and 19 folds(P<0.01),the IgG level about 19%,57%(P<0.01)and 64%(P<0.05),and the IgA lev-el about 65%(P<0.01),47%(P<0.05)and 44%(P<0.01),all in the peripheral blood respectively. Conclusion HXGH could significantly enhance the immune function of the immunocompromised mice.
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The present study was designed to evaluate the immune-modulating effects of the polysaccharide from Grifola frondosa (GFP) by using mouse peritoneal macrophage and cytoxan (CTX) induced immunosuppression models. Our results from the phagocytotic and mononuclear phagocytic system function assays showed that GFP-A (one component from GFP) stimulated the phagocytosis of the phagocytes. The splenocyte proliferation assay showed that GFP-A acted the effect combing ConA or LPS in splenocyte proliferation. The results showed that GFP-A increased indices of thymus and spleen, the levels of LDH and ACP in the spleen, the mRNA levels of IL-1β, IL-2, IL-6 and IFN-γ in splenocyte. And GFP-A also significantly increased the expression of CD4(+) and CD8(+) splenic T lymphocytes, which were suppressed by the CTX in peripheral blood. In conclusion, our results indicate that the GFP-A is involved in immunomodulatory effects leading to its modulatory effects on immunosuppression.
Subject(s)
Animals , Female , Mice , Cells, Cultured , Grifola , Chemistry , Immunologic Factors , Pharmacology , Interleukin-1beta , Allergy and Immunology , Interleukin-6 , Genetics , Allergy and Immunology , Macrophages , Allergy and Immunology , Mice, Inbred BALB C , Plant Extracts , Pharmacology , Polysaccharides , Pharmacology , T-Lymphocytes , Allergy and ImmunologyABSTRACT
This article was aimed to study the immunomodulatory effect of ethanol sediments of the seeds of Descurainia sophia(L.) Webb. ex Prantl. both in vitro and in vivo. The lymphocyte proliferation test in vitro was carried out to explore the effect of the ethanol sediments on the proliferation of T cell and B cell in the spleen of normal mice. And, the carbon clearance test, serum hemolysin test, and delayed-type hypersensitivity test were used to investigate the influence of fraction on non-specific immunity, humoral immunity and cellular immunity in the immunosuppressive mice induced by cyclophosphamide. Besides, the immunosuppressive model was used to evaluate the effect of fraction on immune organs and content of cellular factors in blood serum. The results showed that the ethanol sediments promoted Concanavalin A (Con A) induced T cell and Lipopolysaccharides (LPS) induced B cell (P < 0.01). It increased the carbon clearance index K, phagocytic index α, half value hemolysis (HC50), and swelling degree of auricula (P < 0.05 or P < 0.01). It reduced the body weight and atrophy of thymus and spleen index (P < 0.05 or P < 0.01). It increased the contents of IL-2, IFN-γ and IL-4 in serum in immunosuppressive mice (P < 0.05 or P < 0.01). It was concluded that ethanol sediments of the seeds of D. sophia(L.) Webb. ex Prantl. can boost the lymphocyte proliferation, protect the immune organs, and enhance the non-specific and specific immunity in immunosuppressive mice, which indicated that it had immune-promotion effect.
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Lectinas são proteínas cuja principal característica é a de se ligar específica e reversivelmente a carboidratos. BanLec é a lectina presente na polpa de bananas, que se liga especificamente a manose e glicose, e é capaz de induzir a proliferação de células T, podendo estimular a resposta imune. Existem indícios de que o teor de BanLec pode variar dependendo do estádio de amadurecimento e do tipo de cultivar, o que pode afetar a quantidade de BanLec existente na fruta quando consumida in natura e a possível resposta imune frente ao consumo de banana. Por este motivo, um dos objetivos desse trabalho foi determinar os teores e a atividade hemaglutinante de BanLec em extratos de farinha de banana verde, além de bananas das cultivares Pacovan, Figo, Terra, Mysore e Nanicão, nos estádios de maturação verde e maduro, e submetidas a tratamento com 1-MCP e baixa temperatura (para cv. Nanicão). Com vista a atender ao objetivo de avaliar seus efeitos imunomoduladores in vivo, a BanLec foi purificada da cultivar Nanicão e administrada por via oral a camundongos BALB/c. Os ensaios de atividade hemaglutinante dos extratos de banana apontaram para maior quantidade de BanLec no fruto maduro, quando comparado ao verde, e ausência dessa proteína na cultivar Figo. Os parâmetros imunológicos analisados após administração de BanLec aos camundongos demonstram que a resposta imune gerada após ingestão de BanLec é dose dependente, além disso, a administração de 50 µg de BanLec aos animais foi capaz de modular citocinas importantes na resposta imunológica, provavelmente causando um efeito que pode ser interpretado como mais protetor do que patogênico. Com base nos resultados obtidos, podemos concluir que existem diferenças nos teores de BanLec dependendo da cultivar e estádio de maturação analisado, sendo que essa proteína não está presente na polpa de todas as variedades de banana e finalmente, que ela tem grande potencial imunomodulador in vivo, uma vez que ativou citocinas de resposta anti-inflamatória
Lectins are proteins which bind specifically and reversibly to carbohydrates. BanLec is the lectin present in banana pulp, and it binds to mannose and glucose, being capable of inducing T-cell proliferation, and to stimulate the immune response. There are some evidence that the amount of BanLec may vary depending on the maturation stage of the fruit and the cultivar (cv.), which may affect the amount of BanLec and the possible immune response after consumption of banana. Thus, this study aimed to evaluate the amount of BanLec and its hemagglutinating activity in crude extracts of bananas from cultivars Pacovan, Figo, Terra, Mysore and Nanicão, in both unripe and ripe maturation stage, and also fruits which were treated with 1-MCP and low temperature. In addition, in order to access their immunomodulatory effects in vivo, BanLec was purified by affinity chromatography and administered orally to BALB/c mice. The hemagglutinating activity assays indicate higher amount of BanLec in ripe fruit. Moreover, the possible was undetectable in the pulp of banana Figo. The immunological parameters of mice orally fed with BanLec showed that the immunological response is dependent on the amount of protein administrated, in agreement to previous in vitro studies. Besides, 50 µg of BanLec, were able to modulate some cytokines in immune response, causing an effect that seems to be more protective than pathogenic. We conclude that there are important differences in amount of BanLec depending on the cultivar and the maturation stage, and BanLec has a dose-dependent immunomodulatory effect in vivo
Subject(s)
Musa/immunology , Plant Lectins/analysis , Immunomodulation/immunology , Immunologic Factors/pharmacology , Biochemistry , Immunologic Tests , Food Analysis/methodsABSTRACT
This article was aimed to study immunomodulatory effect of chemical split fractions ofMori Cortex, in order to initially explain effective parts that played a role in immunomodulatory effect ofMori Cortex. The carbon clearance test, serum hemolysin test, E-rosette test, and lymphocyte transformation test were carried out to explore influence of these chemical split fractions ofMori Cortex on immune organs, nonspecific immunity, humoral immunity and cellular immunity. The results showed that in the carbon clearance test, 50% ethanol fraction markedly reduced the thymus index (P<0.01) and the correction indexα (P<0.05). In hemolysin test, the half value hemolysis (HC50) was improved by 30% ethanol fraction and fatty oil fraction (P<0.05). Besides, in the E-rosette test, the E-rosette ration was increased in the 30% ethanol fraction group (P<0.05). In the lymphocyte transformation test, the 30% ethanol fraction can promote the thymus and spleen lymphocytes proliferation (P<0.05 orP<0.01), while the 50% ethanol fraction inhibited the proliferation (P<0.05 orP<0.01). It was concluded that the 30% ethanol fraction can boost both the humoral immunity and cellular immunity; the 50% ethanol fraction can induce the growth of thymus with a suppressive effect on nonspecific immunity and cellular immunity; the fatty oil fraction can improve humoral immunity.
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OBJECTIVE: To investigate the active substances with immunoenhancement effect in Prepared Radix Rehmanniae and its mechanism of action. METHODS: Balb/c mice lymphocytes were isolated from thymus and spleens with conventional methods. MTT assay was carried out for proliferation detection, and then ELISA assay was used to measure the levels of Th1 cytokines IL-2, IFN-γ and Th2 cytokines IL-4, IL-5 of lymphocytes from thymus and spleens of the mice. RESULTS: The water extract (0.049, 0.49 and 4. 9 mg · mL-1) and crude polysaccharide extract (0.032, 0.32 and 3.2 mg · mL-1) of Prepared Radix Rehmanniae resulted in strong promotion of thymus and spleen lymphocytes proliferation and obvious increase of IL-2, IFN-γ, IL-4 and IL-5 levels with or without Con A stimulation. These effects were dose-related. CONCLUSION: Prepared Radix Rehmanniae can significantly enhance immune responses, and the active substance might be crude polysaccharide. The mechanism of their immunoenhancement effects is partly due to enhancement of gene expression of Th1/Th2 cytokines of T cells.
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Introduction: There are over 1500 plants on our planet that have anti-diabetes properties. Research findings suggest that more than 400 plant species showing hypoglycemic activity on experimental diabetes in animals.Healthy diet, regular physical activity, maintaining a normal body weight and avoiding tobacco use can prevent or delay the onset diabetes. Recently, numbers of high level researches were conducted worldwide to study the nature and mechanism to treat diabetes, tens of methods were discovered, and dozens of medical herbs were studies, yet very few herbal hypoglycemic drugs without side effects and at low cost are found. Scientists are still in search for development of new and better oral drugs for diabetes without side effect at relatively low cost. Materials and Methods: The research was conducted at the Scientific Research Center of “Monos” Institute of Traditional Medicine and in biochemical Laboratory of “Khuljborjigon” Clinic. For the experiment, we used 23 perfectly healthy mice of same sex and size which meets standards of laboratory testing. The Prozorovski3 quick method for the determination of LD50 in the water (20%) and ethanol extractions (30%) of Antidiabetes-3 preparation (AD3). The tested animals were the white mice. Following Erne (1963), Kovalev I.E.,(1976), Petrov’s (1980) 4 methodology of studying effects on immune system, we have Antidiabetes-3 preparation (AD3) were given to the 33 mice 2 times a day in 3ml/200gr dose, during 7 days. On third day of the experiment, we injected into vein 2ml of 10 % sheep’s RBC to stimulate the immunity. On the fifth day, we defined weight of pancreas, number of pancreatic cells, pancreatic index, and haemagglutination titre to screen RBC antibodies.Results: The method developed by V.B. Prozorovski for the calculation of average lethal number was used on 40 white mice (18-22g). Water extraction (10%) was per fused in the tail vein of the experience mouse and the lethal dose (LD50) was 88.9g/kg. These facts prove that the toxic effect of the AD is low. The water (10%) extractions of “Antidiabetes-3” (AD3) preparation were given to the mice 2 times a day in 3ml/200g dose, during 8 days. We have studying compared group “Salimon and Immunal mixture” (S&I) to the mice 2ml/200g dose, during 8 days. On third day of the experiment, we injected into vein 2ml of 10 % sheep’s RBC to stimulate the immunity. On the fifth day, we defined weight of pancreas, number of pancreatic cells, pancreatic index, and hemagglutinin to screen RBC antibodies (Table 1). Figure 1 demonstrates increase in mice’s spleen weight on the 5th day after stimulation of immunity with sheep’s RBC antigen. Spleen weight increase in AD3 group was 1.6 times higher compare to control group (AD3 group 0.16±0.08; control group 0.10±0.02; p<0, 05), and AD3 group was 1.0 times level compare to control group (AD3 group 0.16±0.08; S&I group 0.17±0.09; p<0, 05). In figure 2, the spleen index in control group was 1.24 times higher than in normal group (control group 0, 0047±0.001; normal group 0.0038±0.0004; p<0, 3), AD3 group’s index was 1.3 times higher compare to control group (AD3 group 0.0061±0.002, control group 0, 0047±0.001; p< 0.05), and 1.0 times lower compare to S&I group (AD3 group 0.0061±0.002; S&I group 0.0062±0.003; p< 0.05). In figure 3, the number of spleen cells of control group’s was 142.71±55.51*106/ml. this is 1.2 times lower compare to normal group which is 172.67±135.5 *106/ml. AD3 group’s spleen cell number was 329.78±187.78*106/ml and 1.61 times bigger than in control group. In comparison to control group, haemagglutination titre of AD3 group was 1.13 times higher (AD3 group 54.86±19.95%; control group 50±8.83%, p<0,05) and this indicates that BV has immunity stimulating effect.Conclusions:1. Was defined the Antidiabet-3 preparation LD50, 88,9g/kg, its toxicity of classification (Sydorov K.K 1973) was little toxicity.2. Was defined to immunity stimulating effect the Antidiabet-3 preparation
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non-skeletal actions,including immunoregulation,anti-tumor effect,and protecting from central nervous system diseases and metabelie syndrome.