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1.
J Agric Food Chem ; 72(15): 8805-8816, 2024 Apr 17.
Artigo em Inglês | MEDLINE | ID: mdl-38566515

RESUMO

Traditional petroleum-based food-packaging materials have poor permeability, limited active packaging properties, and difficulty in biodegradation, limiting their application. We developed a carboxymethylated tamarind seed polysaccharide composite film incorporated with ε-polylysine (CTPε) for better application in fresh-cut agricultural products. The CTPε films exhibit excellent water vapor barrier properties, but the mechanical properties are slightly reduced. Fourier transform infrared spectroscopy and X-ray diffraction spectra indicate the formation of hydrogen bonds between ε-PL and CTP, leading to their internal reorganization and dense network structure. With the increase of ε-PL concentration, composite films showed notable inhibition of postharvest pathogenic fungi and bacteria, a significant enhancement of 2,2'- azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) radical-scavenging activity, and gradual improvement of wettability performance. Cytotoxicity experiments confirmed the favorable biocompatibility when ε-PL was added at 0.3% (CTPε2). In fresh-cut bell pepper preservation experiments, the CTPε2 coating effectively delayed weight loss and malondialdehyde increase preserved the hardness, color, and nutrients of fresh-cut peppers and prolonged the shelf life of the fresh-cut peppers, as compared with the control group. Therefore, CTPε composite films are expected to be a valuable packaging material for extending the shelf life of freshly cut agricultural products.


Assuntos
Capsicum , Quitosana , Tamarindus , Antioxidantes/farmacologia , Antioxidantes/análise , Polilisina/farmacologia , Polilisina/química , Capsicum/microbiologia , Antibacterianos/farmacologia , Antibacterianos/química , Embalagem de Alimentos , Polissacarídeos/farmacologia , Sementes/química , Quitosana/química
2.
Carbohydr Polym ; 331: 121847, 2024 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-38388032

RESUMO

Tamarind seed polysaccharide (TSP) is a biocompatible, non-ionic polymer with antioxidant properties. Its uses include drug delivery, food industry, and wastewater treatment. TSP has various hydroxy functional groups, one of the most favorable sites for graft copolymerization of different monomers. Hence, various chemical methods for TSP modification were developed to satisfy increasing industrial demand. Of particular interest in scientific community are the methods of graft copolymerization because of their ability to alter the physicochemical properties of TSP, including pH sensitivity and the swelling index, leading to improvements in the adsorption efficiency of hazardous heavy metals and dyes from wastewater effluents. Moreover, in recent years, TSP has been used for controlled drug delivery applications due to its unique advantages of high viscosity, broad pH tolerance, non-carcinogenicity, mucoadhesive properties, biocompatibility, and high drug entrapment capacity. In light of the plethora of literature on the topic, a comprehensive review of TSP-based graft copolymers and unmodified and modified TSP important applications is necessary. Therefore, this review comprehensively highlights several synthetic strategies for TSP-grafted copolymers and discusses unmodified and modified TSP potential applications, including cutting-edge pharmaceutical, environmental applications, etc. In brief, its many advantages make TSP-based polysaccharide a promising material for applications in various industries.


Assuntos
Tamarindus , Tamarindus/química , Polissacarídeos/química , Preparações Farmacêuticas , Sistemas de Liberação de Medicamentos , Viscosidade , Sementes/química
3.
J Am Nutr Assoc ; 43(1): 48-58, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37224433

RESUMO

BACKGROUND AND OBJECTIVE: NXT15906F6 (TamaFlexTM) is a proprietary herbal composition containing Tamarindus indica seeds and Curcuma longa rhizome extracts. NXT15906F6 supplementation has been shown clinically effective in reducing knee joint pain and improving musculoskeletal functions in healthy and knee osteoarthritis (OA) subjects. The objective of the present study was to assess the possible molecular basis of the anti-OA efficacy of NXT15906F6 in a monosodium iodoacetate (MIA)-induced model of OA in rats. METHODS: Healthy male Sprague Dawley rats (age: 8-9 wk body weight, B.W.: 225-308 g (n = 12) were randomly assigned to one of the six groups, (a) vehicle control, (b) MIA control, (c) Celecoxib (10 mg/kg B.W.), (d) TF-30 (30 mg/kg B.W.), (e) TF-60 (60 mg/kg B.W.), and (f) TF-100 (100 mg/kg B.W.). OA was induced by an intra-articular injection of 3 mg MIA into the right hind knee joint. The animals received either Celecoxib or TF through oral gavage over 28 days. The vehicle control animals received intra-articular sterile normal saline. RESULTS: Post-treatment, NXT15906F6 groups showed significant (p < 0.05) dose-dependent pain relief as evidenced by improved body weight-bearing capacity on the right hind limb. NXT15906F6 treatment also significantly reduced the serum tumor necrosis factor-α (TNF-α, p < 0.05) and nitrite (p < 0.05) levels in a dose-dependent manner. mRNA expression analyses revealed the up-regulation of collagen type-II (COL2A1) and down-regulation of matrix metalloproteinases (MMP-3, MMP-9 and MMP-13) in the cartilage tissues of NXT15906F6-supplemented rats. Cyclooxygenase-2 and inducible nitric oxide synthase (iNOS) protein expressions were down-regulated. Decreased immunolocalization of NF-κß (p65) was observed in the joint tissues of NXT15906F6-supplemented rats. Furthermore, microscopic observations revealed that NXT15906F6 preserved MIA-induced rats' joint architecture and integrity. CONCLUSION: NXT15906F6 reduces MIA-induced joint pain, inflammation, and cartilage degradation in rats.


Assuntos
Osteoartrite , Tamarindus , Humanos , Ratos , Masculino , Animais , Criança , Ácido Iodoacético/efeitos adversos , Osteoartrite/induzido quimicamente , Celecoxib/efeitos adversos , Curcuma , Ratos Sprague-Dawley , Modelos Animais de Doenças , Dor/tratamento farmacológico , Inflamação/induzido quimicamente , Artralgia/tratamento farmacológico , Fator de Necrose Tumoral alfa/efeitos adversos
4.
J Drug Target ; 31(10): 1081-1097, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-37886815

RESUMO

One of the most prevalent worldwide problems that affect all ages and genders is skin burn. The goal of our study was to assess the ability of curcumin nanoparticles to cure a rat burn model. Three formulations were selected after several tests were performed including investigation of encapsulation efficiency, particle size and zeta potential measurements. In vitro release was achieved on the three selected formulations. The effectiveness of the chosen formulation for healing was evaluated. The induced burn wound was smeared, starting just after excision, once daily with curcumin nanoparticles for 18 days. Our findings revealed that curcumin nanoparticles improved the burn healing potential by augmenting the skin regeneration indices as evidenced by enhancing the new production of hyaluronic acid and collagen type I. Additionally, curcumin nanoparticles could increase levels of vascular endothelial growth factor and alpha smooth muscle activity while drastically reducing the skin's tumour necrosis factor content, revealing a significant potential for burn healing process that is also reflected in the histopathological and immunohistochemical studies. Finally, our results demonstrated that curcumin nanoparticles revealed a significant potential for burn healing than curcumin alone due to its potent antimicrobial, antioxidant and anti-inflammatory properties.


Assuntos
Queimaduras , Quitosana , Curcumina , Nanopartículas , Tamarindus , Feminino , Ratos , Masculino , Animais , Quitosana/química , Curcumina/farmacologia , Curcumina/uso terapêutico , Fator A de Crescimento do Endotélio Vascular , Nanopartículas/química , Queimaduras/tratamento farmacológico
5.
J Food Sci ; 88(11): 4639-4652, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37755709

RESUMO

The fruits of Tamarindus indica L. are consumed worldwide, with various parts of the plant being used for medicinal purposes. The residues (pericarp and seeds) generated during cellulose processing are of significant value as they contain bioactive compounds with diverse biological activities. The objective of this study was to evaluate the chemical constituents of the ethyl acetate fraction as possible substitutes for synthetic compounds with biological properties using ultra-high performance liquid chromatography coupled to high-resolution mass spectrometry (UHPLC-HRMS/MS) analysis and the evaluation of the antioxidant activity (ferric reducing antioxidant power [FRAP], 2,2'-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid [ABTS], and 1-diphenyl-2-picrylhydrazyl [DPPH]), total phenolic compounds (TPC), and antimicrobial activity of the hydroalcoholic extract and tamarind seed fractions were also performed. The chemical investigation of the acetate fraction using UHPLC-HRMS/MS resulted in the putative identification of 14 compounds, including flavonoids, (+)-catechin/(-)-epicatechin, procyanidin B2, procyanidin C2, isoquercetin, quercetin, luteolin, rutin, taxifolin, eriodictyol, kaempferide, hydroxybenzoic acid, protocathecuic acid, and protocathecuic acid methyl and ethyl esters derivatives. The crude hydroalcoholic extract exhibited the best results in terms of TPC: 883.87 gallic acid equivalent (GAE; mg/g) and antioxidant activity: FRAP: 183.29 GAE (mg/g), ABTS: 39.67%, and DPPH: 91.08%. The extract exhibited excellent antibacterial activity against gram-positive bacteria, specifically Staphylococcus aureus minimum inhibitory concentration (MIC)/minimum bactericidal concentration (MBC; 62.5/125 g/mL) and Bacillus cereus MIC/MBC (125/250 g/mL), and gram-negative bacteria, specifically Aeromonas hydrophila MIC/MBC (125/250 µg/mL) and Pseudomonas aeruginosa MIC/MBC (250/500 g/mL). Morphological damage to cells was observed using flow cytometry and scanning electron microscopy. Tamarind seeds contain unique bioactive compounds that should be explored for their use as novel food preservatives. PRACTICAL APPLICATION: Original data were obtained regarding the Tamarindus indica L. seed extract and the ethyl acetate and hexane fractions. This research aimed to investigate the potential of these for food preservation and as alternatives to additives and synthetic compounds added to cattle feed. This paper reports novel findings regarding the chemical composition of the extract and its antioxidant activity, along with its antimicrobial activity against bacteria (gram-positive: Staphylococcus aureus, Bacillus cereus, and gram-negative: Salmonella enterica serovar Enteritidis, Escherichia coli, Pseudomonas aeruginosa, and Aeromonas hydrophila) and yeasts (Candida albicans and Saccharomyces cerevisiae).


Assuntos
Acetatos , Antioxidantes , Benzotiazóis , Ácidos Sulfônicos , Tamarindus , Animais , Bovinos , Antioxidantes/química , Tamarindus/química , Extratos Vegetais/química , Fenóis/análise , Antibacterianos/farmacologia , Antibacterianos/análise , Sementes/química
6.
Food Chem ; 429: 136901, 2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-37487395

RESUMO

In order to improve the effectiveness of the active packaging, we aimed to develop an active packaging film with unidirectional sustained release, high barrier protection, and seamless attachment between the layers. An active film based on glutenin/tamarind gum loaded with the binary microemulsion of melatonin/pummelo essential oil (G/T-M-E) with sustained release and combination effects of internal and external layers was prepared. The outer barrier layer exerted an excellent protective barrier effect after adding (3-chloropropyl) triethoxysilane, which effectively reduced external interference and the ineffective diffusion of active substances in the inner layer. The effective attachment of melatonin and essential oil layer in the G/T-M-E film enhanced antioxidation, microorganism inhibition, and free-radical-scavenging properties, which effectively delayed the senescence of post-harvest white mushrooms. Furthermore, the G/T-M-E exhibited excellent tensile strength, barrier capacity, and load-bearing strength, which had a potential, positive effect on food preservation. Therefore, this film is highly recommended for packaging purposes.


Assuntos
Agaricus , Melatonina , Óleos Voláteis , Tamarindus , Óleos Voláteis/farmacologia , Melatonina/farmacologia , Embalagem de Alimentos , Preparações de Ação Retardada/farmacologia
7.
J Enzyme Inhib Med Chem ; 38(1): 67-83, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36305291

RESUMO

Bacterial infections have become a global concern, stimulating the growing demand for natural and biologically safe therapeutic agents with antibacterial action. This study was evaluated the genotoxicity of the trypsin inhibitor isolated from tamarind seeds (TTI) and the antibacterial effect of TTI theoric model, number 56, and conformation number 287 (TTIp 56/287) and derived peptides in silico. TTI (0.3 and 0.6 mg.mL-1) did not cause genotoxicity in cells (p > 0.05). In silico, a greater interaction of TTIp 56/287 with the Gram-positive membrane (GP) was observed, with an interaction potential energy (IPE) of -1094.97 kcal.mol-1. In the TTIp 56/287-GP interaction, the Arginine, Threonine (Thr), and Lysine residues presented lower IPE. In molecular dynamics (MD), Peptidotrychyme59 (TVSQTPIDIPIGLPVR) showed an IPE of -518.08 kcal.mol-1 with the membrane of GP bacteria, and the Thr and Arginine residues showed the greater IPE. The results highlight new perspectives on TTI and its derived peptides antibacterial activity.


Assuntos
Tamarindus , Inibidores da Tripsina , Inibidores da Tripsina/farmacologia , Tamarindus/química , Peptídeos/química , Sementes/química , Antibacterianos/farmacologia , Antibacterianos/análise , Arginina/análise , Arginina/química
8.
Nutrients ; 14(21)2022 Nov 04.
Artigo em Inglês | MEDLINE | ID: mdl-36364929

RESUMO

Obesity is associated with metabolic and physiological effects in the gut. In this study, we evaluated the anti-inflammatory effect of trypsin inhibitor isolated from tamarind seeds (TTI) in vitro (interaction with lipopolysaccharide (LPS) and inhibitory activity against human neutrophil elastase (HNE)), and using intestinal co-cultures of Caco-2:HT29-MTX cell lines inflamed with TNF-α (50 ng/mL) and a Wistar rat model of diet-induced obesity (n = 15). TTI was administered to animals by gavage (10 days), and the treated group (25 mg/kg/day) was compared to animals without treatment or treated with a nutritionally adequate diet. In the in vitro study, it showed inhibitory activity against HNE (93%). In co-cultures, there was no protection or recovery of the integrity of inflamed cell monolayers treated with TTI (1.0 mg/mL). In animals, TTI led to lower plasma concentrations of TNF-α and IL-6, total leukocytes, fasting glucose, and LDL-c (p < 0.05). The intestines demonstrated a lower degree of chronic enteritis, greater preservation of the submucosa, and greater intestinal wall thickness than the other groups (p = 0.042). Therefore, the better appearance of the intestine not reflected in the intestinal permeability added to the in vitro activity against HNE point to possibilities for new studies and applications related to this activity.


Assuntos
Tamarindus , Ratos , Animais , Humanos , Células CACO-2 , Fator de Necrose Tumoral alfa/metabolismo , Mucosa Intestinal/metabolismo , Ratos Wistar , Permeabilidade , Obesidade/tratamento farmacológico , Obesidade/etiologia , Obesidade/metabolismo , Dieta , Intestinos , Anti-Inflamatórios/farmacologia , Anti-Inflamatórios/metabolismo
9.
Molecules ; 27(16)2022 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-36014557

RESUMO

Tamarindus indica L. or tamarind seed is an industrial by-product of interest to be investigated for its potential and value-added application. An ethanolic tamarind seed coat (TS) extract was prepared using the maceration technique and used to determine the phytochemical composition and bioactivities. The total phenolic and flavonoid contents were determined using colorimetric methods; moreover, chemical constituents were identified and quantified compared to the standard compounds using the HPLC-UV DAD technique. Bioactivities were investigated using various models: antioxidative activity in a DPPH assay model, anti-melanogenesis in B16 melanoma cells, anti-adipogenesis in 3T3-L1 adipocytes, and anti-microbial activity against S. aureus, P. aeruginosa, E. coli, and C. albican using agar disc diffusion and microdilution methods. The results manifested a high content of catechin as a chemical constituent and multiple beneficiary bioactivities of TS extract, including superior antioxidation to ascorbic acid and catechin, comparable anti-melanogenesis to deoxyarbutin, and significant anti-adipogenesis through inhibition of pre-adipocyte differentiation and reduction of lipid and triglyceride accumulation, and a broad spectral anti-microbial activity with a selectively high susceptibility to S. aureus when compared to 1% Parabens. Conclusively, TS extract has been revealed as a potential bioactive agent as well as an alternative preservative for application in food, cosmetic, and pharmaceutical product development.


Assuntos
Catequina , Tamarindus , Células 3T3-L1 , Animais , Antioxidantes/análise , Antioxidantes/farmacologia , Catequina/química , Escherichia coli , Camundongos , Extratos Vegetais/química , Sementes/química , Staphylococcus aureus , Tamarindus/química
10.
Biomed Res Int ; 2022: 9565136, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35832850

RESUMO

To date, there is no satisfactory and effective therapy available to cure type 2 diabetes mellitus (T2DM). This present work is focused on plant extracts and the effect of saroglitazar and TET genes on oxidative stress and inflammation in vitro adipocytes. Aqueous extracts of Tamarindus indica and Momordica charantia seed have shown potent antidiabetic activity that decreases glucose levels in diabetic adipocytes. After seven and fourteen days, the sugar level in the blood was significantly reduced when plant extracts were supplemented. Lipid profiles including total cholesterol (TC), triglyceride (TGL), high-density lipoprotein (HDL), low-density lipoprotein (LDL), and very low-density lipoprotein (VLDL) showed a highly significant change as expected in adipocytes treated with glucose compared with controlled adipocytes (P < 0.001). Gene expression of catalase, superoxide dismutase (SOD1, SOD2), and glutathione peroxidase (GPx) are changed twice, thrice, and quadruplet, respectively. The level of interleukin-1 (IL1) and tumor necrosis factor-α (TNF-α) was restored but the interleukin-6 (IL6) and ten-eleven-translocation-1 (TET1) were completely knocked down by the use of saroglitazar. In comparison with the diabetic group, this supplementation significantly increased glycogen content and glucose-6-phosphate dehydrogenase activity. In the extract supplemented group, glucose-6-phosphatase, glucose-oxidizing enzyme, and glucose-phosphorylating enzyme activities were significantly reduced. After seven days of extract supplementation, these parameters were not resettled to a controlled level; however, after 14 days of supplementation, all parameters were restored to the control level. In addition to altering gene expression, TET enzymes may contribute to altered adiposity and its metabolic consequences. The purpose of this study is to examine new ideas and approaches for treating obesity, T2DM, and other associated metabolic disorders.


Assuntos
Diabetes Mellitus Experimental , Diabetes Mellitus Tipo 2 , Momordica charantia , Tamarindus , Adipócitos/metabolismo , Animais , Glicemia , Diabetes Mellitus Experimental/metabolismo , Diabetes Mellitus Tipo 2/tratamento farmacológico , Diabetes Mellitus Tipo 2/genética , Regulação para Baixo , Expressão Gênica , Glucose , Hipoglicemiantes/farmacologia , Inflamação/tratamento farmacológico , Inflamação/genética , Lipoproteínas LDL/metabolismo , Fenilpropionatos , Extratos Vegetais/farmacologia , Pirróis , Tamarindus/metabolismo
11.
Sci Rep ; 12(1): 9432, 2022 06 08.
Artigo em Inglês | MEDLINE | ID: mdl-35676439

RESUMO

Tamarindus indica is one of the tropical medicinal plants that has been attributed curative potential of numerous diseases by many rural dwellers. This study was designed to evaluate the antioxidant, antibacterial activities and also to determine the various chemical constituents responsible for its pharmacological activities. The methanol extract of Tamarindus indica fruit pulp was analyzed by Gas Chromatography/Mass Spectrometer to determine the volatile compounds present. The antioxidant activities were performed using DPPH and FRAP method and the antibacterial activity was tested against some common pathogens by macro broth dilution method. The GCMS analysis shows the presence of 37 compounds, out of which 14 had their peak area percentages ≥ 1% and only two compounds had no reported pharmacological activities. Most of the bioactive compounds including 5-Hydroxymethylfurfural (31.06%)-3-O-Methyl-d-glucose (16.31%), 1,6-anhydro-ß-D-Glucopyranose (9.95%), 5-methyl-Furancarboxaldehyde (3.2%), Triethylenediamine (1.17%), 1-(2-furanyl)-1-Propcanone (2.18%), Methyl 2-furoate (3.14%), Levoglucosenone (3.21%), methyl ester-Hepta-2,4-dienoic acid, (8.85%), 2,3-dihydro-3,5-dihydrox-4H-Pyran-4-one (3.4%), O-α-D-glucopyranosyl-(1.fwdarw.3)-ß-D-fructofuranosyl-α-D-Glucopyranoside (2.18%), n-Hexadecanoic acid (1.38%), 2-Heptanol, acetate (1.29%), 5-[(5-methyl-2-fur-2-Furancarboxaldehyde (1.08%), 3-Methyl-2-furoic acid (1.05%) and cis-Vaccenic acid (2.85%)have been reported with different activities such as antibacterial, antifungal, antitubercular, anticancer, antioxidant and other prophylactic activities. The extract demonstrated inhibitory potential against all tested pathogen. However, Plesiomonas shigellosis ATCC 15903 and Bacillus pumillus ATCC 14884 are more sensitive with the MIC of 0.22 and 0.44 mg/ml respectively. The antioxidant activity was relatively low due to the low phenolic content of the extract. This shows that there is a strong correlation between antioxidant activities and phenolic content. GC-MS analysis revealed the presence of bioactive phytoconstituents with various biological activities and this justifies the rationale behind its usage as a curative therapy by many local dwellers.


Assuntos
Antioxidantes , Tamarindus , Antibacterianos/química , Antibacterianos/farmacologia , Antioxidantes/química , Antioxidantes/farmacologia , Metanol/química , Fenóis/química , Extratos Vegetais/química , Extratos Vegetais/farmacologia , Tamarindus/química
12.
Molecules ; 27(10)2022 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-35630710

RESUMO

Biodiesel is considered a sustainable alternative to petro-diesel owing to several favorable characteristics. However, higher production costs, primarily due to the use of costly edible oils as raw materials, are a chief impediment to its pecuniary feasibility. Exploring non-edible oils as raw material for biodiesel is an attractive strategy that would address the economic constraints associated with biodiesel production. This research aims to optimize the reaction conditions for the production of biodiesel through an alkali-catalyzed transesterification of Tamarindus indica seed oil. The Taguchi method was applied to optimize performance parameters such as alcohol-to-oil molar ratio, catalyst amount, and reaction time. The fatty acid content of both oil and biodiesel was determined using gas chromatography. The optimized conditions of alcohol-to-oil molar ratio (6:1), catalyst (1.5% w/w), and reaction time 1 h afforded biodiesel with 93.5% yield. The most considerable contribution came from the molar ratio of alcohol to oil (75.9%) followed by the amount of catalyst (20.7%). In another case, alcohol to oil molar ratio (9:1), catalyst (1.5% w/w) and reaction time 1.5 h afforded biodiesel 82.5% yield. The fuel properties of Tamarindus indica methyl esters produced under ideal conditions were within ASTM D6751 biodiesel specified limits. Findings of the study indicate that Tamarindus indica may be chosen as a prospective and viable option for large-scale production of biodiesel, making it a substitute for petro-diesel.


Assuntos
Biocombustíveis , Tamarindus , Álcoois , Álcalis , Biocombustíveis/análise , Catálise , Óleos de Plantas/química , Estudos Prospectivos
13.
Braz. J. Pharm. Sci. (Online) ; 58: e19373, 2022. tab, graf
Artigo em Inglês | LILACS | ID: biblio-1384009

RESUMO

Abstract The main purposes of the current study were to formulate o/w nanoemulsions as a carrier for Tamarindus indica (tamarind) fruit pulp extract and to study the antioxidant and antibacterial potentials of nanoemulsions containing tamarind extract, focusing on cosmetic/hygiene applications. The o/w nanoemulsions using a mixture of Tween 80 and Span 80 as an emulsifier (5%w/w) were prepared by a high pressure homogenization process. Two concentrations of sweet tamarind extract, 3.3 and 6.6%w/w, based on the bioactivity study, were incorporated into the blank nanoemulsions to produce loaded nanoemulsions, F1-3.3TE (3.3%) and F1- 6.6TE (6.6%). As compared with the unloaded nanoemulsion, both tamarind extract loaded nanoemulsions showed reduced pH and significantly increased viscosity. Overall, the loaded nanoemulsions had droplet sizes of approximately 130 nm, zeta potential around -38 mV and polydispersity index (PDI) values less than 0.2. The nanoemulsion F1-3.3TE had better stability (e.g. significantly greater % tartaric acid content and lesser PDI value) than the nanoemulsion F1-6.6TE did. The antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl assay revealed that the nanoemulsions F1-3.3TE and F1-6.6TE had scavenging activities of 81.66 ± 0.77% and 63.80 ± 0.79%, respectively. However, antioxidant activity of these two formulations decreased under stress conditions (heating-cooling cycles). Such incidence did not occur for their antibacterial properties investigated by agar well diffusion technique. The two formulations exhibited inhibition zones of approximately 24.0-27.7 mm against Staphylococcus aureus and Staphylococcus epidermidis, responsible for malodor of underarms. The results suggest the potential of using sweet tamarind pulp extract loaded nanoemulsions as hygiene products.


Assuntos
Tamarindus/efeitos adversos , Frutas/classificação , Antibacterianos/análise , Antioxidantes/análise , Staphylococcus aureus/classificação , Staphylococcus epidermidis/classificação , Potencial zeta , Calefação/instrumentação , Concentração de Íons de Hidrogênio , Métodos
14.
Semina ciênc. agrar ; 43(2): 509-522, mar.-abr. 2022. ilus, tab, graf
Artigo em Inglês | LILACS, VETINDEX | ID: biblio-1368814

RESUMO

Seed quality is routinely assessed by direct tests, e.g, the germination test, or indirect tests like the tetrazolium test, which has shoown to be promising in the determine viability and vigor, allowing the diagnosis of the main problems that may affect seed quality, such as mechanic damages, field deterioration and storage. In this respect, this study was conducted to develop a tetrazolium test protocol to evaluate the viability and vigor of Tamarindus indica L. seeds. Before exposing the seeds to the tetrazolium solution, seed preconditioning studies were carried out in which seven soaking times were tested. The soaking time that did not cause damage to the seed embryo and allowed the removal of the seed coat to expose the seed structures to the tetrazolium salt was selected. Then, an experiment was set up in a completely randomized design with a 2x3x3 factorial arrangement involving two seed lots, three soaking times in tetrazolium salt (6, 12 and 16 h) and three salt concentrations (0.075, 0.1 and 0.5%), totaling 18 treatments with four replicates of 25 seeds, evaluated at 40 ºC. For each treatment, the seeds were divided into three classes, namely, viable and vigorous embryos (class 1); viable embryos (class 2) and non-viable or dead embryos (class 3). For a comparison with the tetrazolium test results, the two seed lots were analyzed for water content, germination, emergence, first count, germination speed index, emergence speed index, growth and seedling dry weight. The viability and vigor of T. indica seeds can be evaluated after a soaking period of 48 h and immersion for 6h in tetrazolium salt at the concentration of 0.1%, at 40°C, with provides results similar to conventional seed viability tests. The tetrazolium test proved to be adequate to differentiate T. indica seed lots in terms of viability.(AU)


A qualidade das sementes é avaliada rotineiramente por testes diretos como o de germinação e indiretos como o teste de tetrazólio que tem se mostrado promissor na determinação da viabilidade e vigor possibilitando o diagnóstico dos principais problemas que podem afetar a qualidade das sementes, como danos mecânicos, deterioração de campo e armazenamento. Neste sentido, objetivou-se com este trabalho desenvolver um protocolo do teste de tetrazólio para avaliar a viabilidade e o vigor das sementes de Tamarindus indica L. Antes da exposição das sementes a solução de tetrazólio, foram realizados estudos pre-condicionamento das sementes utilizando sete períodos de embebição sendo selecionado o tempo que não causou danos ao embrião da semente e permitiu a remoção do tegumento para exposição das estruturas da semente ao sal de tetrazólio. Em seguida, o experimento foi instalado em delineamento inteiramente casualizado em esquema fatorial 2x3x3, sendo dois lotes de sementes, três tempos de embebição em sal (6; 12 e 16 horas) e três concentrações de sal de tetrazólio (0,075; 0,1 e 0,5%), totalizando dezoito tratamentos com quatro repetições de 25 sementes, avaliados a 40 ºC. Para cada tratamento as sementes foram divididas em três classes: embriões viáveis e vigorosos (classe 1); embriões viáveis (classe 2) e embriões inviáveis ou mortos (classe 3). Para comparar com o resultado do teste de tetrazólio os dois lotes de sementes foram submetidos a análise de teor de água, germinação, emergência, primeira contagem e índice de velocidade de germinação e emergência, crescimento e massa seca de plântulas. A viabilidade e o vigor das sementes de T. indica podem ser avaliados após um período de 48h de embebição e 6h de imersão na concentração de 0,1% de sal de tetrazólio a 40 ºC, com resultados semelhantes aos testes convencionais de determinação da viabilidade das sementes. O teste de tetrazólio mostrou-se adequado para diferenciar a viabilidade em relação aos lotes de sementes de T. indica.(AU)


Assuntos
Sementes/fisiologia , Germinação , Tamarindus/fisiologia
15.
Int J Nanomedicine ; 16: 2533-2553, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33824590

RESUMO

PURPOSE: The present study was intended to fabricate chitosan (Ch)-tamarind gum polysaccharide (TGP) polyelectrolyte complex stabilized cubic nanoparticles of simvastatin and evaluate their potential against human breast cancer cell lines. MATERIALS AND METHODS: The antisolvent precipitation method was used for formulation of nanoparticles. Factorial design (32) was utilized as a tool to analyze the effect of Ch and TGP concentration on particle size and entrapment efficiency of nanoparticles. RESULTS: Formulated nanoparticles showed high entrapment efficiency (67.19±0.42-83.36±0.23%) and small size (53.3-383.1 nm). The present investigation involved utilization of two biological membranes (egg and tomato) as biological barriers for drug release. The study revealed that drug release from tomato membranes was retarded (as compared to egg membranes) but the release pattern matched that of egg membranes. All formulations followed the Baker-Lansdale model of drug release irrespective of the two different biological barriers. Stability studies were carried out for 45 days and exhibited less variation in particle size as well as a reduction in entrapment efficiency. Simvastatin loaded PEC stabilized nanoparticles exhibited better control on growth of human breast cancer cell lines than simple simvastatin. An unusual anticancer effect of simvastatin nanoparticles is also supported by several other research studies. CONCLUSION: The present study involves first-time synthesis of Ch-TGP polyelectrolyte complex stabilized nanoparticles of simvastatin against MCF-7 cells. It recommends that, in future, theoretical modeling and IVIVC should be carried out for perfect designing of delivery systems.


Assuntos
Quitosana/química , Nanopartículas/química , Gomas Vegetais/química , Polieletrólitos/química , Polissacarídeos/química , Sinvastatina/farmacologia , Tamarindus/química , Antineoplásicos/farmacologia , Morte Celular/efeitos dos fármacos , Portadores de Fármacos , Sistemas de Liberação de Medicamentos , Liberação Controlada de Fármacos , Humanos , Células MCF-7 , Nanopartículas/ultraestrutura , Tamanho da Partícula , Espectrofotometria Infravermelho , Eletricidade Estática
16.
Int J Biol Macromol ; 178: 283-295, 2021 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-33626372

RESUMO

Nanoparticles are interesting area of research developed for several diagnostic and therapeutic applications. Tamarind flower extract is rich in Xyloglucan, a starch like polysaccharide which promotes proliferation and various application areas like drug-delivery technology. In recent years researchers are evaluating nanoliposome using in vitro and in vivo studies to discover their biomedical applications. Considering the importance and feasibility of nanoliposome, the present study is focused on synthesis of liposomes via biological method. The biological molecules of Tamarindus indica flower were used for the synthesis of nanoliposome. The synthesized Tamarindus indica flower extract lipid nanoparticles (TifeLiNPs) loaded with xyloglucans were characterized and evaluated for therapeutic applications (antibacterial, antioxidant, antidiabetic, anticancer and anti-inflammatory activities) under in vitro condition. UV-Vis spectral analysis revealed the emission of peak at 232 nm. Further, the chemical characterization using FTIR revealed the presence of components in the functional group. EDX analysis exhibited the presence of O, Na, P and Cl, while DLS confirmed bilayer formation of xyloglucan and liposomes with uniform size (70-80 nm) and spherical shape. The Physicochemical characterization of tamarind flower extract for its chemical composition revealed the presence of carbohydrates, alkaloids, terpenoids, glycosides, saponins, tannins and flavonoids in confirmatory test. Presence of carbohydrate polymers such as rhamnose, arabinose, galactose, glucose and xylose revealed using high performance anion exchange (HPAE) chromatography under basic conditions on an ion chromatographic system were measured using Pulsed Amperometric Detection (PAD). The synthesized nanoliposome evaluated against Gram negative and Gram positive bacteria showed potential antibacterial activity. TifeLiNPs demonstrated significant in vitro antioxidant potential, antidiabetic, anti-cancer and anti-inflammatory activity. Overall, the present study exhibited the potential application of TifeLiNPs for biomedical purposes.


Assuntos
Flores/química , Glucanos , Nanoestruturas , Extratos Vegetais/química , Tamarindus/química , Xilanos , Avaliação Pré-Clínica de Medicamentos , Glucanos/química , Glucanos/farmacologia , Células HeLa , Humanos , Lipossomos , Nanoestruturas/química , Nanoestruturas/uso terapêutico , Xilanos/química , Xilanos/farmacologia
17.
Bioprocess Biosyst Eng ; 44(6): 1185-1192, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33582887

RESUMO

The current investigation aims to synthesize gold nanoparticles (AuNPs) from aqueous extract of Tamarindus indica and to evaluate the in vitro anti-bacterial and in vivo sedative and anelgescic activities of crude extract as well as synthesized AuNPs. Several methods have been reported to synthesize AuNPs; however, most of them were not ecofriendly. In the present study, the green synthesis of AuNPs has been carried out. Using the green synthesis method, AuNPs of T. indica were synthesized at room temperature (25 °C) by mixing 5 mL of HAuCl4 (1 mM) with 1 mL of T. indica seed extract solution. This extract solution was prepared by taking 5 gm dry seeds in 100 mL of double deionized water with continuous stirring for up to 24 h at 80 °C. The stability of AuNPs was confirmed with the help of relevant experimental techniques including ultraviolet-visible (UV/Vis) showing maximum absorbance at 535-540 nm, Fourier transform infrared showing a broad signal at 3464 cm-1 which can be attributed to either amide or hydroxyl functionalities and atomic force microscopy analysis showed that the biomaterial surrounding AuNPs was agglomerated which proves the formation of discrete nanostructutres. These AuNPs have been evaluated for their antibacterial potential. The results revealed good antibacterial activity of the samples against. Klebsiella pneumonia, Bacillus subtilis and Staphylococcus epidermidis with 10-12 mm zone of inhibition range. The AuNPs were also found stable at high temperature, over a range of pH and in 1 mM salt solution. Moreover, the crude extract and respective AuNPs also exhibited interesting sedative and analgesic activities. Hence, we focused on phytochemicals-mediated synthesis of AuNPs considered as greatest attention in the treatment of anti-bacterial, analgesic, and sedative.


Assuntos
Antibacterianos , Bactérias/crescimento & desenvolvimento , Ouro , Química Verde , Nanopartículas Metálicas/química , Tamarindus/química , Antibacterianos/síntese química , Antibacterianos/química , Antibacterianos/farmacologia , Ouro/química , Ouro/farmacologia , Extratos Vegetais/química , Sementes/química
18.
J Sci Food Agric ; 101(2): 593-602, 2021 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-32683712

RESUMO

BACKGROUND: Tamarind pulp contains polyphenolic compounds that exert antioxidant and anti-inflammatory effects with a positive impact on human health. The elaboration of a tamarind-based functional beverage, without the addition of sucrose, can be an alternative to traditional caloric beverages. This study aimed to evaluate the sensory profile and time intensity of a functional tamarind beverage containing artificial and natural non-nutritive sweeteners. RESULTS: The results of the acceptance test, check-all-that-apply, and time-intensity tests showed that there were no statistically significant differences between the means of samples sweetened with sucralose and samples sweetened with sucrose for attributes relating to appearance, aroma, flavor, or texture, or for overall impression. Samples with natural sweeteners had lower means for overall product impression and a lower percentage of purchase intention. The perception of astringency, bitter taste, and bitter aftertaste may be linked to the lower global impression of the product. The descriptors 'tamarind flavor' and 'refreshment sensation' were higher in products that were more liked. The sample sweetened with stevia showed higher levels of sweetness, bitterness, and longer sweet stimulus duration in the time-intensity test. CONCLUSION: The sample sweetened with sucralose was the best alternative to sucrose in the functional tamarind beverage. The analyzed sweeteners did not show changes in the perception of the natural characteristics of the fruit used, such as tamarind flavor, refreshment sensation, and astringency. However, the attributes related to sweet and bitter aftertaste experienced in samples with natural sweeteners may have influenced the reduction in the intention to purchase the product. © 2020 Society of Chemical Industry.


Assuntos
Bebidas/análise , Aromatizantes/análise , Adoçantes não Calóricos/análise , Extratos Vegetais/análise , Tamarindus/química , Frutas/química , Humanos , Sacarose/análise , Edulcorantes/análise , Paladar
19.
Int J Biol Macromol ; 164: 1608-1620, 2020 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-32763397

RESUMO

In this study, we developed tamarind gum (TG) and rice bran oil (RBO)-based emulgels. The control formulation (TR0), did not contain RBO. The emulgels were named as TR1, TR2, TR3, and TR4, which contained 5% (w/w), 10% (w/w), 15% (w/w), and 20% (w/w/) of RBO, respectively. The microscopic studies showed that the emulgels were biphasic in nature. FTIR spectroscopy revealed the reduction in the hydrogen bonding with an increase in the RBO content. Impedance profiles suggested that the resistive component of the emulgels was increased as the RBO content was increased. The thermal analysis suggested that the addition of RBO reduced the water holding capacity of the emulgels. Stress relaxation studies revealed that the fluidic component was considerably higher in TG/RBO-based emulgels as compared to TR0. In vitro release study of the model drug (ciprofloxacin HCl; a hydrochloride salt of ciprofloxacin) suggested a significantly lower release from the emulgel matrices (TR1-TR4) in comparison to TR0. However, ex vivo corneal permeation of the drug increased with an increase in the RBO content. Since the emulgels were able to improve the corneal permeation of the model drug, the emulgels can be explored to deliver drugs to the internal structures of the eye.


Assuntos
Antibacterianos/administração & dosagem , Antibacterianos/química , Óleos de Plantas/química , Óleo de Farelo de Arroz/química , Tamarindus/química , Ciprofloxacina/administração & dosagem , Ciprofloxacina/química , Olho/efeitos dos fármacos , Ligação de Hidrogênio
20.
Hig. Aliment. (Online) ; 34(291): e1039, Julho/Dezembro 2020. tab
Artigo em Português | LILACS, VETINDEX | ID: biblio-1482550

RESUMO

O “geladinho” é muito comum no Brasil, e sua aceitação pela população é muito grande, agradando pessoas de praticamente todas as faixas etárias, principalmente crianças e jovens. Por isso, foi realizada uma pesquisa para avaliar a qualidade física, química e microbiológica desse produto, comercializado em Morrinhos – GO. O produto pode ser chamado de vários nomes, cada região brasileira denomina de uma forma, como por exemplo, “sacolé”, “flau”, “gelinho”, ”geladinho”, “chupe-chupe”, “chope”, em Morrinhos – GO o sabor predileto da população é o de tamarindo. Foram avaliadas quatro amostras de três pontos de vendas. Foram realizadas análises de pH, acidez titulável total, sólidos solúveis totais, vitamina C, peso médio, e análises de Salmonella, coliformes totais e termotolerantes, bolores e leveduras. Nas análises física e químicas foi realizado o acompanhamento após 28 dias de armazenamento em freezer a -18° a -22°C. Nenhuma amostra apresentou presença de coliformes totais, E. coli, e Salmonella. Porém verificou-se a presença de bolores e leveduras em baixos níveis. No geral, os produtos encontravam-se em condições sanitárias satisfatórias conforme a RDC 12/2001.


The “geladinho” is very common in Brazil, and its acceptance by the population is very large, pleasing people of practically all age groups, mainly children and young people. Therefore, research was carried out to evaluate the physical, chemical and microbiological quality of this product, sold in Morrinhos – GO. The product can be called by several names, each Brazilian region names it in a different way, such as “sacolé”, “flau”, “gelinho”, “geladinho”, “chupe-chupe”, “chope”, in Morrinhos – GO the favorite flavor of the population is tamarind. Four samples from three points of sale were evaluated. pH, total titratable acidity, total soluble solids, vitamin C, average weight, Salmonella, total and thermotolerant coliforms, molds and, yeasts were analyzed. In the physical and solid analyzes performed, the follow-up after 28 days of storage in a freezer at -18 ° to -22°C. No samples presented the presence of total coliforms, E. Coli, and Salmonella. However, compensation value UFC/mL, although small, of molds and yeasts. In general, the products were in satisfactory sanitary conditions according to RDC 12/2001.


Assuntos
Gelados Comestíveis , Qualidade dos Alimentos , Tamarindus/microbiologia , Tamarindus/química
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