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1.
Nutrients ; 13(12)2021 Nov 29.
Artigo em Inglês | MEDLINE | ID: mdl-34959865

RESUMO

Bromelain is a major sulfhydryl proteolytic enzyme found in pineapple plants, having multiple activities in many areas of medicine. Due to its low toxicity, high efficiency, high availability, and relative simplicity of acquisition, it is the object of inexhaustible interest of scientists. This review summarizes scientific reports concerning the possible application of bromelain in treating cardiovascular diseases, blood coagulation and fibrinolysis disorders, infectious diseases, inflammation-associated diseases, and many types of cancer. However, for the proper application of such multi-action activities of bromelain, further exploration of the mechanism of its action is needed. It is supposed that the anti-viral, anti-inflammatory, cardioprotective and anti-coagulatory activity of bromelain may become a complementary therapy for COVID-19 and post-COVID-19 patients. During the irrepressible spread of novel variants of the SARS-CoV-2 virus, such beneficial properties of this biomolecule might help prevent escalation and the progression of the COVID-19 disease.


Assuntos
Anti-Inflamatórios/uso terapêutico , Anticoagulantes/uso terapêutico , Transtornos da Coagulação Sanguínea/tratamento farmacológico , Bromelaínas/uso terapêutico , Tratamento Farmacológico da COVID-19 , Cardiotônicos/uso terapêutico , Doenças Cardiovasculares/tratamento farmacológico , Neoplasias/tratamento farmacológico , Proteínas de Plantas/uso terapêutico , SARS-CoV-2 , Ananas/enzimologia , Anti-Inflamatórios/química , Anticoagulantes/química , Bromelaínas/química , Cardiotônicos/química , Fibrinólise/efeitos dos fármacos , Humanos , Proteínas de Plantas/química
2.
Int J Biol Macromol ; 180: 161-176, 2021 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-33676977

RESUMO

Bromelain, papain, and ficin are studied the most for meat tenderization, but have limited application due to their short lifetime. The aim of this work is to identify the adsorption mechanisms of these cysteine proteases on chitosan to improve the enzymes' stability. It is known that immobilization can lead to a significant loss of enzyme activity, which we observed during the sorption of bromelain (protease activity compared to soluble enzyme is 49% for medium and 64% for high molecular weight chitosan), papain (34 and 28% respectively) and ficin (69 and 70% respectively). Immobilization on the chitosan matrix leads to a partial destruction of protein helical structure (from 5 to 19%). Using computer modelling, we have shown that the sorption of cysteine proteases on chitosan is carried out by molecule regions located on the border of domains L and R, including active cites of the enzymes, which explains the decrease in their catalytic activity upon immobilization. The immobilization on chitosan does not shift the optimal range of pH (7.5) and temperature values (60 °C for bromelain and papain, 37-60 °C for ficin), but significantly increases the stability of biocatalysts (from 5.8 times for bromelain to 7.6 times for papain).


Assuntos
Bromelaínas/química , Bromelaínas/metabolismo , Quitosana/metabolismo , Composição de Medicamentos/métodos , Enzimas Imobilizadas/química , Enzimas Imobilizadas/metabolismo , Ficina/química , Ficina/metabolismo , Papaína/química , Papaína/metabolismo , Adsorção , Ananas/enzimologia , Biocatálise , Biotecnologia/métodos , Carica/enzimologia , Domínio Catalítico , Estabilidade Enzimática , Ficus/enzimologia , Concentração de Íons de Hidrogênio , Extratos Vegetais/química , Extratos Vegetais/metabolismo , Estrutura Secundária de Proteína , Temperatura
3.
Protein J ; 40(3): 406-418, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33713245

RESUMO

Bromelain, a member of cysteine proteases, is found abundantly in pineapple (Ananas comosus), and it has a myriad of versatile applications. However, attempts to produce recombinant bromelain for commercialization purposes are challenging due to its expressibility and solubility. This study aims to express recombinant fruit bromelain from MD2 pineapple (MD2Bro; accession no: OAY85858.1) in soluble and active forms using Escherichia coli host cell. The gene encoding MD2Bro was codon-optimized, synthesized, and subsequently ligated into pET-32b( +) for further transformation into Escherichia coli BL21-CodonPlus(DE3). Under this strategy, the expressed MD2Bro was in a fusion form with thioredoxin (Trx) tag at its N-terminal (Trx-MD2Bro). The result showed that Trx-MD2Bro was successfully expressed in fully soluble form. The protein was successfully purified using single-step Ni2+-NTA chromatography and confirmed to be in proper folds based on the circular dichroism spectroscopy analysis. The purified Trx-MD2Bro was confirmed to be catalytically active against N-carbobenzoxyglycine p-nitrophenyl ester (N-CBZ-Gly-pNP) with a specific activity of 6.13 ± 0.01 U mg-1 and inhibited by a cysteine protease inhibitor, E-64 (IC50 of 74.38 ± 1.65 nM). Furthermore, the catalytic efficiency (kcat/KM) Trx-MD2Bro was calculated to be at 5.64 ± 0.02 × 10-2 µM-1 s-1 while the optimum temperature and pH were at 50 °C and pH 6.0, respectively. Furthermore, the catalytic activity of Trx-MD2Bro was also affected by ethylenediaminetetraacetic acid (EDTA) or metal ions. Altogether it is proposed that the combination of codon optimization and the use of an appropriate vector are important in the production of a soluble and actively stable recombinant bromelain.


Assuntos
Ananas/genética , Bromelaínas , Expressão Gênica , Proteínas de Plantas , Ananas/enzimologia , Bromelaínas/biossíntese , Bromelaínas/química , Bromelaínas/genética , Bromelaínas/isolamento & purificação , Catálise , Proteínas de Plantas/biossíntese , Proteínas de Plantas/química , Proteínas de Plantas/genética , Proteínas de Plantas/isolamento & purificação , Proteínas Recombinantes/biossíntese , Proteínas Recombinantes/química , Proteínas Recombinantes/genética , Proteínas Recombinantes/isolamento & purificação
4.
J Food Sci ; 86(2): 385-393, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33415738

RESUMO

Bromelain is widely used in food industry and pharmaceutical products due to its strong antioxidant properties. Therefore, the extraction of bromelain from pineapple peel may improve the profitability and sustainability of pineapple industry. The aim of this work is to show the purification, stability, and kinetics of bromelain from pineapple peel. By studying the stability of purified bromelain (PB), we found that the activity of PB was inhibited by Fe3+ , Al3+ , methanol, ethanol, and n-butyl alcohol, while it was increased in the presence of Ca2+ , ethylenediamine tetra acetic acid, glucose, D-xylose, maltose, potassium sodium tartrate, sodium citrate, citric acid, and sodium nitrite. These stability tests will expand the application and space acquisition of bromelain. The kinetics study indicated that the thermal inactivation of PB was conforming to the first-order reaction and the half-life (t1/2 ) of PB under different temperature conditions (45, 55, 65, and 75 °C) was 81.54, 31.12, 10.28, and 5.23 min, respectively. Therefore, the inactivation time of PB can be predicted at different temperatures for food heating processing. PRACTICAL APPLICATION: The potential of utilizing pineapple peel for bromelain extraction might improve the profitability and sustainability of the pineapple industry.


Assuntos
Ananas/enzimologia , Bromelaínas/isolamento & purificação , Bromelaínas/metabolismo , Bromelaínas/antagonistas & inibidores , Inibidores Enzimáticos/farmacologia , Estabilidade Enzimática , Indústria de Processamento de Alimentos , Frutas/enzimologia , Temperatura Alta , Cinética
5.
J Mol Model ; 26(6): 142, 2020 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-32417971

RESUMO

Fruit bromelain is a cysteine protease accumulated in pineapple fruits. This proteolytic enzyme has received high demand for industrial and therapeutic applications. In this study, fruit bromelain sequences QIM61759, QIM61760 and QIM61761 were retrieved from the National Center for Biotechnology Information (NCBI) Genbank Database. The tertiary structure of fruit bromelain QIM61759, QIM61760 and QIM61761 was generated by using MODELLER. The result revealed that the local stereochemical quality of the generated models was improved by using multiple templates during modelling process. Moreover, by comparing with the available papain model, structural analysis provides an insight on how pro-peptide functions as a scaffold in fruit bromelain folding and contributing to inactivation of mature protein. The structural analysis also disclosed the similarities and differences between these models. Lastly, thermal stability of fruit bromelain was studied. Molecular dynamics simulation of fruit bromelain structures at several selected temperatures demonstrated how fruit bromelain responds to elevation of temperature.


Assuntos
Ananas/enzimologia , Bromelaínas/metabolismo , Simulação de Dinâmica Molecular , Bromelaínas/química , Estabilidade Enzimática , Temperatura Alta , Conformação Proteica
6.
Shokuhin Eiseigaku Zasshi ; 61(1): 17-21, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32336714

RESUMO

Oranges are consumed worldwide; however, they contain Cit s 2, a major profilin allergen. We aimed to reduce Cit s 2 levels by preparing mixed orange fresh juice with pineapple, as a convenient method for any kitchen. Cit s 2 levels in orange extracts digested with pineapple extract and its protease bromelain were evaluated with quantitative enzyme-linked immunosorbent assay. Cit s 2 levels decreased according to reaction temperature and time, which was inhibited by iodoacetic acid. Treatment with pineapple extract diluted 40-fold and 0.1 mg/mL of bromelain at 37℃ for 30 min contributed to reducing residual Cit s 2 levels below the cut-off of 15%, respectively. Since this condition can increase the proportion of orange juice and reduce the risk of ingesting the pineapple allergen bromelain, it is considered to be more practical. Broad utilization of proteases in hypoallergenic food products is expected following clinical studies for verification.


Assuntos
Alérgenos/isolamento & purificação , Ananas/enzimologia , Bromelaínas/química , Citrus sinensis , Sucos de Frutas e Vegetais/análise , Manipulação de Alimentos/métodos
7.
J Food Biochem ; 43(11): e13011, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31393018

RESUMO

Bromelain is a type of protease found in both fruits and stems of pineapples. Stem bromelain has been extensively studied and is commercially available for applications in various industries. In contrast, studies of fruit bromelain are quite limited since most of pineapples have been consumed freshly, canned or juiced. Nowadays, the consumption of canned fruits, including canned pineapples has decreased greatly. Fruit bromelain could be a new growth point for pineapple industry. In this study, fruit bromelain was extracted from the pineapple juice of Phuket variety and some of its properties were studied. The enzyme was purified by precipitation using ammonium sulfate fractionation followed by ion-exchange and gel filtration chromatography. Consequently, the protease purification level was increased by 95.2 fold. The final specific activity was getting to 448,590 U/mg on average, dominated by cysteine proteases, with optimal activity at 45°C and pH ranging from 6 to 8. The study facilitates the molecular and application research of fruit bromelain. PRACTICAL APPLICATIONS: The research has been carried out at Funong Food Technology Co., Ltd., Guangdong, China, which produces primarily pineapple chunks and juice. As plenty of by-products, like peels and cores of pineapples, are produced, the techniques are employed to extract bromelain from the by-products. The techniques reported in this work are not new or advanced, however, they are applicable during the manufacturing process and the related equipment is easy to set up and operate. What's more, the practical application of the techniques is cost-effective for the manufactories. Take Funong Food Technology Co., Ltd. as an example, they was using 80% saturation ammonium sulfate to precipitate protein from pineapple juice and obtained a bromelain with activity of approximately 8,000 U/mg and yield of 1.7 kg per ton of juice. With the application of the techniques reported in this work, bromelain was first extracted by ammonium sulfate gradient precipitation, and then purified through ion-exchange and gel filtration chromatography. Each step of precipitation and purification generates a different level of activity and recovery of bromelain, ranging from around 2,506 to 448,590 U/mg, which allows for the production of bromelain according to the requirement of the market and brings more profits.


Assuntos
Ananas/enzimologia , Bromelaínas/química , Bromelaínas/isolamento & purificação , Frutas/química , Proteínas de Plantas/química , Proteínas de Plantas/isolamento & purificação , Ananas/química , Estabilidade Enzimática , Alimentos em Conserva/análise , Frutas/enzimologia , Sucos de Frutas e Vegetais/análise , Concentração de Íons de Hidrogênio , Caules de Planta/química , Tailândia
8.
Biochimie ; 166: 194-202, 2019 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-31306685

RESUMO

Ananain (EC 3.4.22.31) accounts for less than 10% of the total enzyme in the crude pineapple stem extract known as bromelain, yet yields the majority of the proteolytic activity of bromelain. Despite a high degree of sequence identity between ananain and stem bromelain, the most abundant bromelain cysteine protease, ananain displays distinct chemical properties, substrate preference and inhibitory profile compared to stem bromelain. A tripeptidyl substrate library (REPLi) was used to further characterize the substrate specificity of ananain and identified an optimal substrate for cleavage by ananain. The optimal tripeptide, PLQ, yielded a high kcat/Km value of 1.7 x 106 M-1s-1, with cleavage confirmed to occur after the Gln residue. Crystal structures of unbound ananain and an inhibitory complex of ananain and E-64, solved at 1.73 and 1.98 Å, respectively, revealed a geometrically flat and open S1 subsite for ananain. This subsite accommodates diverse P1 substrate residues, while a narrow and deep hydrophobic pocket-like S2 subsite would accommodate a non-polar P2 residue, such as the preferred Leu residue observed in the specificity studies. A further illustration of the atomic interactions between E-64 and ananain explains the high inhibitory efficiency of E-64 toward ananain. These data reveal the first in depth structural and functional data for ananain and provide a basis for further study of the natural properties of the enzyme.


Assuntos
Ananas/enzimologia , Bromelaínas/química , Cisteína Endopeptidases/química , Extratos Vegetais/química , Proteínas de Plantas/química , Sítios de Ligação , Cinética , Modelos Moleculares , Especificidade por Substrato
9.
Food Chem ; 282: 48-57, 2019 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-30711105

RESUMO

High cost and enzyme deactivation in purification process are the two main obstacles for the use of enzyme as green catalyst. The objective of this work was to overcome these limitations by developing a cost-effective aqueous two-phase system (ATPS) for efficient purification of enzymes with remarkable separation efficiency and high retention of enzyme activity. The ATPS was formed by thermo-responsive block copolymer PEG113-b-PNIPAM149 and salt as phase-forming components combining economy, recovery and sustainability. This strategy fabricated block copolymer with specified molecular weight and low LCST, which not only achieved better phase splitting but also ensured easy recycling for block copolymer. The developed ATPS demonstrated excellent extraction and biocompatibility for bromelain in real sample with 94.87% separation efficiency and 77.06% activity, which were remarkably higher than those obtained in EOPOEO-based ATPS. The recycling of copolymer was introduced to minimize cost, with recovery efficiency of 90% in the five cycles.


Assuntos
Bromelaínas/metabolismo , Sucos de Frutas e Vegetais/análise , Polímeros/química , Sais/química , Resinas Acrílicas/química , Ananas/enzimologia , Bromelaínas/genética , Bromelaínas/isolamento & purificação , Fracionamento Químico , Polietilenoglicóis/química , Polímeros/síntese química , Reciclagem , Água/química
10.
Int J Biol Macromol ; 127: 406-414, 2019 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-30654039

RESUMO

Bromelain, a protease from pineapple plant can be applied as oral drug for the treatment of inflammation and certain diseases. Unlike most conventional supports, immobilization on edible support will make the enzyme suitable for therapeutic use. In this study, spores of probiotic Bacillus sp was used for the adsorption of bromelain. Effect of pH, temperature and enzyme concentration on bromelain immobilization was studied, followed by characterization of the enzymes. Maximum bromelain coupling (%) (50.607 ±â€¯4.194) was obtained when immobilization was carried out at pH 6.0, 24 °C for 150 min. The immobilized enzyme showed optimum activity at pH 8 and 80 °C, while the free enzyme had 6 and 60 °C as its optimum pH and temperature, respectively. Bromelain Vmax increased after immobilization while Km decreased. Activation energy, Ea was 26.513 kJ/mol and 20.942 kJ/mol for the free and immobilized enzymes, respectively. The immobilized bromelain also showed significantly greater storage and thermal stability than the free bromelain. At 80 °C, the free bromelain lost all its activity after 50 min while the immobilized enzyme lost only 46.89% activity. Bromelain was successfully immobilized on Bacillus spores with improved catalytic and non-catalytic properties and this holds great potential for its growing therapeutic applications.


Assuntos
Ananas/enzimologia , Bacillus/química , Bromelaínas/química , Enzimas Imobilizadas/química , Proteínas de Plantas/química , Probióticos/química , Esporos Bacterianos/química , Bacillus/citologia , Bacillus/fisiologia , Estabilidade Enzimática , Esporos Bacterianos/metabolismo
11.
Food Chem ; 266: 183-191, 2018 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-30381175

RESUMO

Cysteine proteases in pineapple (Ananas comosus) plants are phytotherapeutical agents that demonstrate anti-edematous, anti-inflammatory, anti-thrombotic and fibrinolytic activities. Bromelain has been identified as an active component and as a major protease of A. comosus. Bromelain has gained wide acceptance and compliance as a phytotherapeutical drug. The proteolytic fraction of pineapple stem is termed stem bromelain, while the one presents in the fruit is known as fruit bromelain. The amino acid sequence and domain analysis of the fruit and stem bromelains demonstrated several differences and similarities of these cysteine protease family members. In addition, analysis of the modelled fruit (BAA21848) and stem (CAA08861) bromelains revealed the presence of unique properties of the predicted structures. Sequence analysis and structural prediction of stem and fruit bromelains of A. comosus along with the comparison of both structures provides a new insight on their distinct properties for industrial application.


Assuntos
Ananas/enzimologia , Bromelaínas/química , Modelos Moleculares , Sequência de Aminoácidos , Bromelaínas/metabolismo , Conformação Proteica , Análise de Sequência de Proteína
12.
J Food Sci ; 83(8): 2148-2158, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-30020543

RESUMO

Bromelain was used to tenderize golden pomfrets (Trachinotus blochii). The enzyme kinetic model was x=2.447×ln[1+(1332.21×E0S0-1.74)t], which indicated that the degree of hydrolysis (DH, x) was dependent on hydrolysis time (t), the initial concentration of myofibril (S0 ) and bromelain (E0 ). The relationship between the overall hydrolysis rate (v), S0 , E0 , and t is demonstrated as: v=(16.50(E0S0)-1.33)S0 exp {-2.447ln[1+(1332.21E0S0-1.74)t2]}. Sample of 0.40% E0 /S0 was further used to study the effects of hydrolysis time on the changes of proteins, peptides, free amino acids (FAA), and protein nanostructure. SDS-PAGE result showed that myosin heavy chain was degraded dramatically from 22.88% before treatment to 12.03% after 2 min bromelain treatment. Meanwhile, bromelain did not exhibit activity towards actin, trypomyosin, myosin light chain, and troponin C. A general increase of amino acids indicated the increased DH and the preferential cleavage sites of bromelain in the descending order of lysine, glutamic acid, glycine, ornithine, methionine sulfoxide, and alanine. Atomic force microscope images showed that the strip-like structure of myofibril was considerably degraded by bromelain, and the granulation of protein after 20 min indicated possible self-assembling of protein hydrolysate. Confocal laser scanning microscopy further confirmed the degradation of myofibril proteins and formation of protein aggregates. PRACTICAL APPLICATION: Meat of golden pomfrets is tough, thus not idea for fish balls or fish cakes. Tenderization is essential to achieve desired texture and consumer acceptance, especially for this fish meat with intrinsic hard texture. Bromelain can be extracted from pineapple processing waste. Enzymatic kinetics was studied to instruct industry to control the tenderness of the processed fish meat. The microstructural and mechanism study elucidate the process, thus could be applied to improve the quality of the seafood products correspondingly.


Assuntos
Bromelaínas/metabolismo , Peixes/metabolismo , Miofibrilas/metabolismo , Alimentos Marinhos , Aminoácidos/análise , Ananas/enzimologia , Animais , Manipulação de Alimentos/métodos , Hidrólise , Cinética , Carne/análise , Miofibrilas/química , Hidrolisados de Proteína/metabolismo , Proteínas/análise , Alimentos Marinhos/análise
13.
Biomed Res Int ; 2017: 9573021, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28706952

RESUMO

Natural rubber latex (NRL) allergy is caused by the extractable latex proteins in dipped rubber products. It is a major concern for the consumers who are sensitive to the allergenic extractable proteins (EP) in products such as NRL gloves. Objective of this research was to develop an economical method to reduce the EP in finished dipped NRL products. In order to reduce the EP levels, two natural proteases, bromelain from pineapple and papain from papaya, were extracted and partially purified using (NH4)2SO4. According to the newly developed method, different glove samples were treated with a 5% solution of each partially purified enzyme, for 2 hours at 60°C. Residual amounts of in treated samples were quantified using the modified Lowry assay (ASTM D5712-10). Bromelain displayed a 54 (±11)% reduction of the EP from the dipped rubber products, whereas it was 58 (±8)% with papain. These results clearly indicate that the selected natural proteases, bromelain, and papain contribute significantly towards the reduction of the total EP in finished NRL products. Application of bromelain enzyme for the aforementioned purpose has not been reported up to date, whereas papain has been used to treat raw NRL towards reducing the EP.


Assuntos
Luvas Protetoras/efeitos adversos , Hipersensibilidade ao Látex/prevenção & controle , Látex/química , Borracha/efeitos adversos , Alérgenos/efeitos adversos , Alérgenos/química , Ananas/enzimologia , Bromelaínas/química , Bromelaínas/farmacologia , Carica/enzimologia , Humanos , Látex/efeitos adversos , Hipersensibilidade ao Látex/induzido quimicamente , Hipersensibilidade ao Látex/fisiopatologia , Papaína/química , Papaína/farmacologia , Proteínas/química , Proteínas/farmacologia , Borracha/química
14.
J Pak Med Assoc ; 67(1): 121-125, 2017 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28065968

RESUMO

Bromelain is an extract obtained from the pineapple plant and is used as a traditional folk remedy for several ailments. In this review, a comprehensive electronic database search was carried out to compile available literature on therapeutic implications of bromelain. Pharmaceutical value of bromelain has been demonstrated in different surgical sub-specialties. Diverse biological processes like anti-inflammatory, anti-oedematous, analgesic, anti-thrombotic, exfoliation etc. are involved in bromelain's therapeutic actions, mediated through the kallikrein-kinin and arachidonic acid pathways as well as through effects on cell mediated immunity. Bromelain equals non-steroidal anti-inflammatory drugs as an anti-inflammatory agent, but has been shown to have fewer side effects. In Europe it is approved for oral and topical use, mainly for surgical wounds, inflammation due to trauma and surgery, and debridement of deep burns. Literature suggests a promising role of bromelain in surgical care. More clinical trials to establish its utility as an anti-inflammatory agent in surgical care are recommended.


Assuntos
Ananas/enzimologia , Anti-Inflamatórios não Esteroides , Bromelaínas , Desbridamento/métodos , Animais , Bromelaínas/química , Bromelaínas/farmacologia , Bromelaínas/uso terapêutico , Queimaduras/tratamento farmacológico , Células Cultivadas , Humanos , Cicatrização/efeitos dos fármacos , Ferimentos e Lesões/tratamento farmacológico
15.
J Sci Food Agric ; 97(5): 1386-1395, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-27790704

RESUMO

Bromelain is a mixture of proteolytic enzymes found in pineapple (Ananas comosus) plants. It can be found in several parts of the pineapple plant, including the stem, fruit, leaves and peel. High demand for bromelain has resulted in gradual increases in bromelain production. These increases have led to the need for a bromelain production strategy that yields more purified bromelain at a lower cost and with fewer production steps. Previously, bromelain was purified by conventional centrifugation, ultrafiltration and lyophilisation. Recently, the development of more modern purification techniques such as gel filtration, ion exchange chromatography, affinity chromatography, aqueous two-phase extraction and reverse micelle chromatography has resulted in increased industrial bromelain production worldwide. In addition, recombinant DNA technology has emerged as an alternative strategy for producing large amounts of ultrapure bromelain. An up-to-date compilation of data regarding the commercialisation of bromelain in the clinical, pharmaceutical and industrial fields is provided in this review. © 2016 Society of Chemical Industry.


Assuntos
Bromelaínas/isolamento & purificação , Tecnologia de Alimentos/métodos , Ananas/química , Ananas/enzimologia , Biotecnologia/métodos , Bromelaínas/química , DNA Recombinante
16.
J Phys Chem B ; 120(25): 5625-33, 2016 06 30.
Artigo em Inglês | MEDLINE | ID: mdl-27268069

RESUMO

The broader scope of ILs in chemical sciences particularly in pharmaceutical, bioanalytical and many more applications is increasing day by day. Hitherto, a very less amount of research is available in the depiction of conformational stability, activity, and thermal stability of enzymes in the presence of ILs. In the present study, the perturbation in the structure, stability, and activity of stem bromelain (BM) has been observed in the presence of 1-allyl-3-methylimidazolium chloride ([Amim][Cl]) using various techniques. This is the first report in which the influence of [Amim][Cl] has been studied on the enzyme BM. Fluorescence spectroscopy has been utilized to map out the changes in the environment around tryptophan (Trp) residues of BM and also to discuss the variations in the thermal stability of BM as an outcome of its interaction with the IL at different concentrations. Further, the work delineates the denaturing effect of high concentration of IL on enzyme structure and activity. It dictates the fact that low concentrations (0.01-0.10 M) of [Amim][Cl] are only changing the structural arrangement of the protein without having harsh consequences on its activity and stability. However, high concentrations of IL proved to be totally devastating for both activity and stability of BM. The observed decrease in the stability of BM at high concentration may be due to the combined effect of cation and anion interactions with the protein residues. The present work is successful in dictating the probable mechanism of interaction between BM and [Amim][Cl]. These results can prove to be fruitful in the studies of enzymes in aqueous IL systems since the used IL is thermally stable and nonvolatile in nature thereby providing a pathway of alteration in the activity of enzymes in potentially green systems.


Assuntos
Compostos Alílicos/química , Materiais Biocompatíveis/química , Bromelaínas/química , Imidazóis/química , Proteínas de Plantas/química , Solventes/química , Compostos Alílicos/metabolismo , Ananas/enzimologia , Sítios de Ligação , Bromelaínas/metabolismo , Dicroísmo Circular , Difusão Dinâmica da Luz , Imidazóis/metabolismo , Simulação de Acoplamento Molecular , Proteínas de Plantas/metabolismo , Estabilidade Proteica , Estrutura Terciária de Proteína , Espectrometria de Fluorescência , Temperatura
17.
Int J Biol Macromol ; 91: 477-85, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27259642

RESUMO

Stem bromelain, a cysteine proteases from Ananas comosus is a widely accepted therapeutic drug with broad medicinal application. It exists as intermediate states at pH 2.0 and 10.0, where it encountered in gastrointestinal tract during adsorption (acidic pH) and in gut epithelium (alkaline pH), respectively. In this study, we monitored the thermal aggregation/amyloid formation of SB at different pH intermediate states. Thermal treatment of stem bromelain at pH 10.0 favors the fibrillation in which the extent of aggregation increases with increase in protein concentration. However, no fibril formation in stem bromelain at pH 2.0 was found at all the concentration used at pH 10.0. The fibril formation was confirmed by various techniques such as turbidity measurements, Rayleigh light scattering, dye binding assays and far UV circular dichroism. The Dynamic light scattering confirmed the formation of aggregates by measuring the hydrodynamic radii pattern. Moreover, microscopic techniques were performed to analyze the morphology of fibrils. The aggregation behavior may be due to variation in number of charged amino acid residues. The less negative charge developed at pH 10.0 may be responsible for aggregation. This work helps to overcome the aggregation related problems of stem bromelain during formulations in pharmaceutical industry.


Assuntos
Ananas/enzimologia , Bromelaínas/química , Proteínas de Plantas/química , Dicroísmo Circular , Temperatura Alta , Concentração de Íons de Hidrogênio , Agregados Proteicos , Espectrofotometria Ultravioleta
18.
Int J Food Microbiol ; 216: 121-6, 2016 Jan 04.
Artigo em Inglês | MEDLINE | ID: mdl-26476327

RESUMO

Alicyclobacillus spp. are spore forming bacteria that are often related to the deterioration of acidic products such as beverages and citrus juices. After the process of industrial pasteurization, the spore produced by the bacteria can germinate and the microorganism can grow, causing sensory abnormalities in the product. Alternative biopreservatives, such as the antimicrobial compounds, are of considerable importance to the food industry. Papain and bromelain are proteolytic enzymes derived frompapaya and pineapple, respectively. These enzymes are widely used in medicine and in the pharmaceutical and food industries, but while some studies have described their antibacterial action, no studies of the Alicyclobacillus spp. exist. The aimof this studywas to analyze the antibacterial effect of papain and bromelain on Alicyclobacillus spp. through 1) determining minimum inhibitory and bactericidal concentration (MIC and MBC); 2) determining the death time curve of the micro-organism in the presence and absence of enzymes; and 3) investigating the enzymatic mechanism on the microorganism. The antibacterial activity of enzymes in combination with nisin was also evaluated. The results showed that for the Alicyclobacillus acidoterrestris strain, the MIC of papain was 0.98 µg/mL and the MBC was 3.91 µg/mL, while theMIC of bromelain was 62.5 µg/mL and the MBCwas 250 µg/mL. The concentration of 4 ×MIC for both the enzymes was sufficient to eliminate 4 logs of the micro-organism after 24 h of incubation. Through the use of enzyme inhibitors specific for cysteine proteases, it was found that the antibacterial activity of papain and bromelain is not related to its proteolytic activity, butmay be related to other activities, such as amidse and esterase. The synergistic activity of the enzymes revealed a fractional inhibitory concentration (FIC) level of 0.16. Combination with nisin revealed an FIC of 0.25 for papain and 0.19 for bromelain, indicating synergism between both compounds. The application of enzymes in reconstituted orange juice contaminated with A. acidoterrestris was found to be effective, as after 48 h of incubation, at three different temperatures, the initial microbial population was eliminated. This study showed that the enzymes papain and bromelain have an antibacterial effect on A. acidoterrestris.


Assuntos
Alicyclobacillus/efeitos dos fármacos , Antibacterianos/farmacologia , Bromelaínas/farmacologia , Nisina/farmacologia , Papaína/farmacologia , Amidoidrolases/metabolismo , Ananas/enzimologia , Bebidas/microbiologia , Carica/enzimologia , Citrus sinensis/microbiologia , Cisteína Proteases/metabolismo , Inibidores de Cisteína Proteinase/química , Sinergismo Farmacológico , Esterases/metabolismo , Testes de Sensibilidade Microbiana , Pasteurização
19.
J Food Sci ; 80(8): E1763-75, 2015 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26220205

RESUMO

The high-pressure processing conditions were optimized for pineapple puree within the domain of 400-600 MPa, 40-60 °C, and 10-20 min using the response surface methodology (RSM). The target was to maximize the inactivation of polyphenoloxidase (PPO) along with a minimal loss in beneficial bromelain (BRM) activity, ascorbic acid (AA) content, antioxidant capacity, and color in the sample. The optimum condition was 600 MPa, 50 °C, and 13 min, having the highest desirability of 0.604, which resulted in 44% PPO and 47% BRM activities. However, 93% antioxidant activity and 85% AA were retained in optimized sample with a total color change (∆E*) value less than 2.5. A 10-fold reduction in PPO activity was obtained at 600 MPa/70 °C/20 min; however, the thermal degradation of nutrients was severe at this condition. Fuzzy mathematical approach confirmed that sensory acceptance of the optimized sample was close to the fresh sample; whereas, the thermally pasteurized sample (treated at 0.1 MPa, 95 °C for 12 min) had the least sensory score as compared to others.


Assuntos
Ananas/química , Bromelaínas/metabolismo , Catecol Oxidase/metabolismo , Frutas/química , Temperatura Alta , Pasteurização/métodos , Pressão , Ananas/enzimologia , Ananas/microbiologia , Antioxidantes/análise , Ácido Ascórbico/análise , Cor , Comportamento do Consumidor , Microbiologia de Alimentos , Conservação de Alimentos/métodos , Frutas/enzimologia , Frutas/microbiologia , Lógica Fuzzy , Humanos , Valor Nutritivo , Odorantes , Paladar
20.
Biotechnol Prog ; 31(4): 937-45, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25919128

RESUMO

Bromelain is a set of proteolytic enzymes found in pineapple (Ananas comosus) tissues such as stem, fruit and leaves. Because of its proteolytic activity, bromelain has potential applications in the cosmetic, pharmaceutical, and food industries. The present study focused on the recovery of bromelain from pineapple peel by liquid-liquid extraction in aqueous two-phase micellar systems (ATPMS), using Triton X-114 (TX-114) and McIlvaine buffer, in the absence and presence of electrolytes CaCl2 and KI; the cloud points of the generated extraction systems were studied by plotting binodal curves. Based on the cloud points, three temperatures were selected for extraction: 30, 33, and 36°C for systems in the absence of salts; 40, 43, and 46°C in the presence of KI; 24, 27, and 30°C in the presence of CaCl2 . Total protein and enzymatic activities were analyzed to monitor bromelain. Employing the ATPMS chosen for extraction (0.5 M KI with 3% TX-114, at pH 6.0, at 40°C), the bromelain extract stability was assessed after incorporation into three cosmetic bases: an anhydrous gel, a cream, and a cream-gel formulation. The cream-gel formulation presented as the most appropriate base to convey bromelain, and its optimal storage conditions were found to be 4.0 ± 0.5°C. The selected ATPMS enabled the extraction of a biomolecule with high added value from waste lined-up in a cosmetic formulation, allowing for exploration of further cosmetic potential.


Assuntos
Ananas/enzimologia , Bromelaínas/química , Bromelaínas/isolamento & purificação , Fracionamento Químico/métodos , Cosméticos/química , Micelas , Biotecnologia
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