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1.
Arq. bras. med. vet. zootec. (Online) ; 73(2): 460-468, Mar.-Apr. 2021. tab
Article in English | LILACS, VETINDEX | ID: biblio-1248954

ABSTRACT

This study was designed to determine adequate levels for sodium butyrate inclusion in pre-hatching and pre-starter feed in order to minimize the negative effects of post-hatch delayed placement on broiler chicks. Newly-hatched chicks were allotted in a completely randomized design, with five treatments, each comprising five replicates of ten birds each. Five dietetic levels of sodium butyrate (control, 0.050, 0.075, 0.100 and 0.200%) were used in the pre-starter feed offered to the chicks in the transporting box and during the pre-starter phase. Performance, yolk sac retraction, plasma glucose concentration, weight and histomorphometry of the small intestine were evaluated after 24 hours of feed access and at 7 days of age. A metabolic trial was performed when the chicks were seven to ten days of age. Supplementation of 0.1% sodium butyrate increased the development of broiler chicks' intestinal villi at seven days of age but was not able to improve performance in the pre-starter phase. Supplementation with sodium butyrate in a diet offered in the transportation box does not improve broiler performance in the pre-starter phase. Supplementation of up to 0.16% is recommended, in order to improve the metabolizability of the ether extract for broilers at seven days of age.(AU)


Objetivou-se, com este estudo, encontrar níveis adequados de inclusão de butirato de sódio em ração pós-eclosão e pré-inicial, buscando minimizar os efeitos negativos do jejum de pintos de corte. Os animais foram distribuídos em delineamento inteiramente ao acaso, com cinco tratamentos e cinco repetições de 10 aves cada. Foram utilizadas cinco suplementações de butirato de sódio (controle; 0,05; 0,075; 0,100 e 0,200%) na ração pré-inicial, fornecidas aos pintos na caixa de transporte e durante a fase pré-inicial. Após 24 horas de acesso ao alimento e aos sete dias de idade, foram avaliados desempenho, retração do saco vitelino, concentração de glicose plasmática, peso e histomorfometria do intestino delgado. De sete a 10 dias de idade, realizou-se ensaio de metabolizabilidade. A suplementação de 0,10% de butirato de sódio aumentou o desenvolvimento das vilosidades intestinais dos pintos de corte aos sete dias de idade, mas não foi capaz de melhorar o desempenho na fase pré-inicial. A suplementação com butirato de sódio em dieta oferecida na caixa de transporte não melhora o desempenho dos frangos na fase pré-inicial. Recomenda-se suplementação de até 0,16%, a fim de melhorar a metabolizabilidade do extrato etéreo para frangos de corte aos sete dias de idade.(AU)


Subject(s)
Animals , Butyrates/administration & dosage , Chickens/growth & development , Animal Feed/analysis , Yolk Sac , Fasting/physiology , Organic Acids
2.
Acta sci., Biol. sci ; 43: e54966, 2021. tab, graf
Article in English | LILACS, VETINDEX | ID: biblio-1460983

ABSTRACT

Many food, cosmetic and pharmaceutical industries have increased their interest in short-chain esters due to their flavor properties. From the industrial standpoint, enzyme reactions are the most economical strategy to reach green products with neither toxicity nor damage to human health. Isoamyl butyrate (pear flavor) was synthesized by isoamyl alcohol (a byproduct of alcohol production) and butyric acid with the use of the immobilized lipase Lipozyme TL IM and hexane as solvents. Reaction variables (temperature, butyric acid concentration, isoamyl alcohol:butyric acid molar ratio and enzyme concentration) were investigated in ester conversion (%), concentration (mol L-1) and productivity (mmol ester g-1 mixture . h), by applying a sequential strategy of the Fractional Factorial Design (FFD) and the Central Composite Rotatable Design (CCRD). High isoamyl butyrate conversion of 95.8% was achieved at 24 hours. At 3 hours, the highest isoamyl butyrate concentration (1.64 mol L-1) and productivity (0.19 mmol ester g-1 mixture . h) were obtained under different reaction conditions. Due to high specificity and selectivity of lipases, process parameters of this study and their interaction with the Lipozyme TL IM are fundamental to understand and optimize the system so as to achieve maximum yield to scale up. Results show that fusel oil may be recycled by the green chemistry process proposed by this study.


Subject(s)
Enzyme Activation , Butyrates/administration & dosage , Butyrates/analysis , Isoamylase , Process Optimization/analysis
3.
Acta bioquím. clín. latinoam ; 53(3): 397-408, set. 2019. ilus, graf, tab
Article in Spanish | LILACS | ID: biblio-1038108

ABSTRACT

Entre los escasos radioprotectores en uso, la amifostina resulta eficaz para reducir la toxicidad aguda inducida por la radiación ionizante. Sin embargo, presenta efectos tóxicos importantes que impiden su uso repetido o en dosis altas. Es necesario entonces desarrollar radioprotectores menos tóxicos, por sí mismos o como coadyuvantes de la amifostina en dosis bajas. Se expusieron ratas Sprague-Dawley a una dosis de rayos X de 6 Gy (cuerpo entero). Se ensayó el butirato de sodio como mitigante luego de una dosis baja de amifostina previa a la irradiación. A distintos tiempos después de la irradiación se realizó el recuento de eritrocitos, leucocitos y la fórmula leucocitaria. Los efectos genotóxicos se evaluaron en leucocitos de sangre mediante el ensayo Cometa. Se realizaron también estudios de supervivencia a 60 días y la evaluación histológica del duodeno e intestino grueso. El efecto del tratamiento resultó moderadamente protector respecto de la recuperación de los valores normales de eritrocitos, leucocitos y la fórmula leucocitaria en los animales sobrevivientes en ambos sexos, así como de los epitelios intestinales y el ADN de los leucocitos. También aumentó significativamente la sobrevida a 60 días. La radioprotección con amifostina en una dosis baja seguida de una mitigación con butirato fue claramente significativa.


Among the few radioprotectors in use, amifostine is effective in reducing the acute toxicity induced by ionizing radiation. However, it has important toxic effects that prevent its repeated use or in high doses. It is necessary then to develop less toxic radioprotectors, by themselves or as adjuvants of amifostine in low doses. Sprague-Dawley rats were exposed to an X-ray dose of 6 Gy (whole body). Sodium butyrate was tested as a mitigant after a low dose of amifostine prior to irradiation. At different times after the irradiation, the erythrocytes, leukocytes and the leukocyte formula were counted. Genotoxic effects were evaluated in blood leukocytes by the Comet assay. Sixty-day survival studies and histological evaluation of the duodenum and large intestine were also performed. The effect of the treatment was moderately protective with respect to the recovery of the normal values of erythrocytes, leukocytes and the leukocyte formula in the surviving animals in both sexes as well as for the intestinal epithelia and leukocytes DNA. It also significantly increased the 60-day survival. The radioprotection with amifostine in a low dose followed by mitigation with butyrate was clearly significant.


Entre os poucos radioprotetores em uso, a amifostina é eficaz na redução da toxicidade aguda induzida pela radiação ionizante. No entanto, tem importantes efeitos tóxicos que impedem seu uso repetido ou em altas doses. É necessário, então, desenvolver radioprotetores menos tóxicos, isoladamente ou como coadjuvantes da amifostina em baixas doses. Ratos Sprague-Dawley foram expostos a uma dose de raios X de 6 Gy (corpo inteiro). O butirato de sódio foi testado como mitigante após uma dose baixa de amifostina antes da irradiação. Em diferentes momentos após a irradiação, os eritrócitos, leucócitos e a fórmula de leucócitos foram contados. Os efeitos genotóxicos foram avaliados em leucócitos de sangue pelo ensaio Cometa. Estudos de sobrevida de 60 dias e avaliação histológica do duodeno e do intestino grosso também foram realizados. O efeito do tratamento resultou moderadamente protetor em relação à recuperação de valores normais de eritrócitos, leucócitos e fórmula leucocitária nos animais sobreviventes em ambos os sexos, bem como protegeu epitélios intestinais e o DNA dos leucócitos. Também aumentou significativamente a sobrevida para 60 dias. A radioproteção com amifostina em baixa dose seguida de uma mitigação com butirato foi claramente significativa.


Subject(s)
Animals , Rats , Sodium/toxicity , Butyrates/toxicity , Amifostine/toxicity , Radiation, Ionizing , Radiation Protection , Butyrates/administration & dosage , Rats, Sprague-Dawley , Amifostine/administration & dosage
4.
Braz. j. med. biol. res ; 45(9): 841-850, Sept. 2012. ilus
Article in English | LILACS | ID: lil-646329

ABSTRACT

The combined treatment with histone deacetylase inhibitors (HDACi) and retinoids has been suggested as a potential epigenetic strategy for the control of cancer. In the present study, we investigated the effects of treatment with butyrate, a dietary HDACi, combined with vitamin A on MCF-7 human breast cancer cells. Cell proliferation was evaluated by the crystal violet staining method. MCF-7 cells were plated at 5 x 10(4) cells/mL and treated with butyrate (1 mM) alone or combined with vitamin A (10 µM) for 24 to 120 h. Cell proliferation inhibition was 34, 10 and 46% following treatment with butyrate, vitamin A and their combination, respectively, suggesting that vitamin A potentiated the inhibitory activities of butyrate. Furthermore, exposure to this short-chain fatty acid increased the level of histone H3K9 acetylation by 9.5-fold (Western blot), but not of H4K16, and increased the expression levels of p21WAF1 by 2.7-fold (Western blot) and of RARβ by 2.0-fold (quantitative real-time PCR). Our data show that RARβ may represent a molecular target for butyrate in breast cancer cells. Due to its effectiveness as a dietary HDACi, butyrate should be considered for use in combinatorial strategies with more active retinoids, especially in breast cancers in which RARβ is epigenetically altered.


Subject(s)
Female , Humans , Anticarcinogenic Agents/pharmacology , Breast Neoplasms/pathology , Butyrates/pharmacology , Cell Proliferation/drug effects , DNA Methylation/drug effects , Histone Deacetylase Inhibitors/pharmacology , Vitamin A/pharmacology , Anticarcinogenic Agents/administration & dosage , Butyrates/administration & dosage , Histone Deacetylase Inhibitors/administration & dosage , Vitamin A/administration & dosage
5.
Indian J Exp Biol ; 2003 Aug; 41(8): 861-4
Article in English | IMSEAR | ID: sea-56300

ABSTRACT

The ability of the differentiation inducing agent sodium butyrate (NaB) alone or combined with plant-derived phenolic compounds to produce growth inhibition in human erythroleukemic cells was investigated. As a single agent, curcumin produced a marked inhibition of proliferation indicated by its low concentration used. The effect of phenolics on the cell cycle could probably contribute to the augmented antiproliferative activity of NaB. The present data show that quercetin produced synergistic effect in terms of cell killing in association with NaB. Both curcumin and ferulic acid potentiated NaB-induced reduction of cell number. When NaB was added before exposure to graded doses of quercetin it did induce a greater inhibitory effect. The combination of NaB and quercetin seems less effective on S180 ascites tumour cells. As a single agent quercetin was found to be the most efficacious on S180 tumour model.


Subject(s)
Animals , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Butyrates/administration & dosage , Cell Division/drug effects , Cell Survival/drug effects , Coumaric Acids/administration & dosage , Curcumin/administration & dosage , Drug Synergism , Flow Cytometry , Humans , K562 Cells , Mice , Neoplasm Transplantation , Quercetin/administration & dosage , Sarcoma 180/drug therapy
6.
Arq. gastroenterol ; 36(4): 238-43, out.-dez. 1999.
Article in Portuguese | LILACS | ID: lil-262051

ABSTRACT

Objetivo - Chamar a atenção para uma promissora alternativa terapêutica no tratamento de retocolite ulcerativa inespecífica em criança. Método - É descrito o caso de uma criança com diagnóstico de retocolite ulcerativa inespecífica, com forma evolutiva crônica contínua, refratária ao tratamento convencional e que foi tratada com enemas contendo butirato. Revisão de literatura pertinente ao caso foi realizada. Resultados - Paciente de 4 anos, feminina, parda, com diagnóstico de retocolite ulcerativa inespecífica desde 1 ano de idade e evolução refratária ao tratamento com corticóide (via oral e retal) e imunossupressor (6-mercaptopurina). Respondeu de modo satisfatório com melhora do quadro clínico, laboratorial, endoscópico e histológico, após o uso de enemas com butirato semelhante às descrições da literatura internacional. Conclusão - Embora sem estar esclarecido o mecanismo de ação do butirato na retocolite ulcerativa inespecífica, melhora significante foi observada neste caso, acenando como possibilidade terapêutica segura nos casos de retocolite ulcerativa inespecífica confinados a segmentos distais.


Subject(s)
Humans , Female , Child, Preschool , Butyrates/therapeutic use , Colitis, Ulcerative/drug therapy , Enema/methods , Mercaptopurine/administration & dosage , Mercaptopurine/therapeutic use , Administration, Oral , Administration, Rectal , Butyrates/administration & dosage , Immunosuppressive Agents/administration & dosage , Immunosuppressive Agents/therapeutic use
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