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Hesari M, Mohammadi P, Moradi M, Shackebaei D, Yarmohammadi F. Molecular mechanisms involved in therapeutic effects of natural compounds against cisplatin-induced cardiotoxicity: a review. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2024:10.1007/s00210-024-03207-3. [PMID: 38850306 DOI: 10.1007/s00210-024-03207-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/31/2024] [Indexed: 06/10/2024]
Abstract
Cisplatin is a widely used chemotherapeutic agent for the treatment of various cancers. However, the clinical use of cisplatin is limited by its cardiotoxic side effects. The primary mechanisms implicated in this cardiotoxicity include mitochondrial dysfunction, oxidative stress, inflammation, and apoptotic. Numerous natural compounds (NCs) have been introduced as promising protective factors against cisplatin-mediated cardiac damage. The current review summarized the potential of various NCs as cardioprotective agents at the molecular levels. These compounds exhibited potent antioxidant and anti-inflammatory effects by interaction with the PI3K/AKT, AMPK, Nrf2, NF-κB, and NLRP3/caspase-1/GSDMD pathways. Generally, the modulation of these signaling pathways by NCs represents a promising strategy for improving the therapeutic index of cisplatin by reducing its cardiac side effects.
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Affiliation(s)
- Mahvash Hesari
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Pantea Mohammadi
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mojtaba Moradi
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
- Department of Physiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Dareuosh Shackebaei
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Fatemeh Yarmohammadi
- Medical Biology Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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2
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Agosto-Maldonado A, Guo J, Niu W. Engineering carboxylic acid reductases and unspecific peroxygenases for flavor and fragrance biosynthesis. J Biotechnol 2024; 385:1-12. [PMID: 38428504 PMCID: PMC11062483 DOI: 10.1016/j.jbiotec.2024.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/03/2024]
Abstract
Emerging consumer demand for safer, more sustainable flavors and fragrances has created new challenges for the industry. Enzymatic syntheses represent a promising green production route, but the broad application requires engineering advancements for expanded diversity, improved selectivity, and enhanced stability to be cost-competitive with current methods. This review discusses recent advances and future outlooks for enzyme engineering in this field. We focus on carboxylic acid reductases (CARs) and unspecific peroxygenases (UPOs) that enable selective productions of complex flavor and fragrance molecules. Both enzyme types consist of natural variants with attractive characteristics for biocatalytic applications. Applying protein engineering methods, including rational design and directed evolution in concert with computational modeling, present excellent examples for property improvements to unleash the full potential of enzymes in the biosynthesis of value-added chemicals.
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Affiliation(s)
| | - Jiantao Guo
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States; The Nebraska Center for Integrated Biomolecular Communication (NCIBC), University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Wei Niu
- Department of Chemical & Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States; The Nebraska Center for Integrated Biomolecular Communication (NCIBC), University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States.
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3
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Røyseth V, Hurysz BM, Kaczorowska AK, Dorawa S, Fedøy AE, Arsın H, Serafim MSM, Myers SA, Werbowy O, Kaczorowski T, Stokke R, O’Donoghue AJ, Steen IH. Activation mechanism and activity of globupain, a thermostable C11 protease from the Arctic Mid-Ocean Ridge hydrothermal system. Front Microbiol 2023; 14:1199085. [PMID: 37405169 PMCID: PMC10315481 DOI: 10.3389/fmicb.2023.1199085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 05/26/2023] [Indexed: 07/06/2023] Open
Abstract
Deep-sea hydrothermal vents offer unique habitats for heat tolerant enzymes with potential new enzymatic properties. Here, we present the novel C11 protease globupain, which was prospected from a metagenome-assembled genome of uncultivated Archaeoglobales sampled from the Soria Moria hydrothermal vent system located on the Arctic Mid-Ocean Ridge. Sequence comparisons against the MEROPS-MPRO database showed that globupain has the highest sequence identity to C11-like proteases present in human gut and intestinal bacteria. Successful recombinant expression in Escherichia coli of the wild-type zymogen and 13 mutant substitution variants allowed assessment of residues involved in maturation and activity of the enzyme. For activation, globupain required the addition of DTT and Ca2+. When activated, the 52kDa proenzyme was processed at K137 and K144 into a 12kDa light- and 32kDa heavy chain heterodimer. A structurally conserved H132/C185 catalytic dyad was responsible for the proteolytic activity, and the enzyme demonstrated the ability to activate in-trans. Globupain exhibited caseinolytic activity and showed a strong preference for arginine in the P1 position, with Boc-QAR-aminomethylcoumarin (AMC) as the best substrate out of a total of 17 fluorogenic AMC substrates tested. Globupain was thermostable (Tm activated enzyme = 94.51°C ± 0.09°C) with optimal activity at 75°C and pH 7.1. Characterization of globupain has expanded our knowledge of the catalytic properties and activation mechanisms of temperature tolerant marine C11 proteases. The unique combination of features such as elevated thermostability, activity at relatively low pH values, and ability to operate under high reducing conditions makes globupain a potential intriguing candidate for use in diverse industrial and biotechnology sectors.
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Affiliation(s)
- Victoria Røyseth
- Department of Biological Sciences, Center for Deep Sea Research, University of Bergen, Bergen, Norway
| | - Brianna M. Hurysz
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, CA, United States
| | - Anna-Karina Kaczorowska
- Collection of Plasmids and Microorganisms | KPD, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
| | - Sebastian Dorawa
- Laboratory of Extremophiles Biology, Department of Microbiology, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
| | - Anita-Elin Fedøy
- Department of Biological Sciences, Center for Deep Sea Research, University of Bergen, Bergen, Norway
| | - Hasan Arsın
- Department of Biological Sciences, Center for Deep Sea Research, University of Bergen, Bergen, Norway
| | - Mateus Sá M. Serafim
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, CA, United States
- Department of Microbiology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Samuel A. Myers
- La Jolla Institute for Immunology, La Jolla, CA, United States
| | - Olesia Werbowy
- Laboratory of Extremophiles Biology, Department of Microbiology, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
| | - Tadeusz Kaczorowski
- Laboratory of Extremophiles Biology, Department of Microbiology, Faculty of Biology, University of Gdańsk, Gdańsk, Poland
| | - Runar Stokke
- Department of Biological Sciences, Center for Deep Sea Research, University of Bergen, Bergen, Norway
| | - Anthony J. O’Donoghue
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, San Diego, CA, United States
| | - Ida Helene Steen
- Department of Biological Sciences, Center for Deep Sea Research, University of Bergen, Bergen, Norway
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4
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Røyseth V, Hurysz BM, Kaczorowska A, Dorawa S, Fedøy AE, Arsin H, Serafim M, Werbowy O, Kaczorowski T, Stokke R, O'Donoghue AJ, Steen IH. Activation mechanism and activity of globupain, a thermostable C11 protease from the Arctic Mid-Ocean Ridge hydrothermal system. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.04.535519. [PMID: 37066400 PMCID: PMC10104074 DOI: 10.1101/2023.04.04.535519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Deep-sea hydrothermal vent systems with prevailing extreme thermal conditions for life offer unique habitats to source heat tolearant enzymes with potential new enzymatic properties. Here, we present the novel C11 protease globupain , prospected from a metagenome-assembled genome of uncultivated Archaeoglobales sampled from the Soria Moria hydrothermal vent system located on the Arctic Mid- Ocean Ridges. By sequence comparisons against the MEROPS-MPRO database, globupain showed highest sequence identity to C11-like proteases present in human gut and intestinal bacteria,. Successful recombinant expression in Escherichia coli of the active zymogen and 13 mutant substitution variants allowed assesment of residues involved in maturation and activity of the enzyme. For activation, globupain required the addition of DTT and Ca²⁺. When activated, the 52 kDa proenzyme was processed at Lys 137 and Lys 144 into a 12 kDa light- and 32 kDa heavy chain heterodimer. A structurally conserved His 132 /Cys 185 catalytic dyad was responsible for the proteolytic activity, and the enzyme demonstrated the ability to activate in-trans . Globupain exhibited caseinolytic activity and showed a strong preference for arginine in the P1 position, with Boc-QAR- aminomethylcoumarin (AMC) as the best substrate out of a total of 17 fluorogenic AMC substrates tested. Globupain was thermostable (T m activated enzyme = 94.51 ± 0.09°C) with optimal activity at 75 °C and pH 7.1. By characterizing globupain, our knowledge of the catalytic properties and activation mechanisms of temperature tolerant marine C11 proteases have been expanded. The unique combination of features such as elevated thermostability, activity at relatively low pH values, and ability to operate under high reducing conditions makes globupain a potential intriguing candidate for use in diverse industrial and biotechnology sectors.
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Pedezzi R, Evangelista DE, da Rosa Garzon NG, de Oliveira Simões FA, de Oliveira AHC, Polikarpov I, Cabral H. Biochemical and biophysical properties of a recombinant serine peptidase from Purpureocillium lilacinum. Biophys Chem 2023; 296:106978. [PMID: 36827753 DOI: 10.1016/j.bpc.2023.106978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023]
Abstract
The industrial uses of peptidases have already been consolidated; however, their range of applications is increasing. Thus, the biochemical characterization of new peptidases could increase the range of their biotechnological applications. In silico analysis identified a gene encoding a putative serine peptidase from Purpureocillium lilacinum (Pl_SerPep), annotated as a cuticle-degrading enzyme. The Pl_SerPep gene product was expressed as a recombinant in a Komagataella phaffii (previously Pichia pastoris) expression system. The enzyme (rPl_SerPep) showed optimal pH and temperature of 8.0 and 60 °C, respectively. Moreover, rPl_SerPep has a higher thermal stability than the cuticle-degrading enzymes described elsewhere. The structural analysis indicated a conformational change in the rPl_SerPep secondary structure, which would allow an increase in catalytic activity at 60 °C. Komagataella phaffii secretes rPl_SerPep with the pro peptide in its inactive form. Low-resolution small-angle X-ray scattering (SAXS) analysis showed little mobility of the pro peptide portion, which indicates the apparent stability of the inactive form of the enzyme. The presence of 20 mM guanidine in the reaction resulted in the maintenance of activity, which was apparently a consequence of pro peptide structure flexibilization.
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Affiliation(s)
- Rafael Pedezzi
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-903, Brazil
| | - Danilo Elton Evangelista
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Sãocarlense 400, São Carlos 13566-590, SP, Brazil
| | - Nathalia Gonsales da Rosa Garzon
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-903, Brazil
| | - Flávio Antônio de Oliveira Simões
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-903, Brazil
| | | | - Igor Polikarpov
- Instituto de Física de São Carlos, Universidade de São Paulo, Avenida Trabalhador Sãocarlense 400, São Carlos 13566-590, SP, Brazil
| | - Hamilton Cabral
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-903, Brazil.
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6
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Current insights into protein solubility: A review of its importance for alternative proteins. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.108416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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7
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Brandelli A, Daroit DJ. Unconventional microbial proteases as promising tools for the production of bioactive protein hydrolysates. Crit Rev Food Sci Nutr 2022; 64:4714-4745. [PMID: 36377687 DOI: 10.1080/10408398.2022.2145262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Enzymatic hydrolysis is the most prominent strategy to release bioactive peptides from different food proteins and protein-rich by-products. Unconventional microbial proteases (UMPs) have gaining increased attention for such purposes, particularly from the 2010s. In this review, we present and discuss aspects related to UMPs production, and their use to obtain bioactive protein hydrolysates. Antioxidant and anti-hypertensive potentials, commonly evaluated through in vitro testing, are mainly reported. The in vivo bioactivities of protein hydrolysates and peptides produced through UMPs action are highlighted. In addition to bioactivities, enzymatic hydrolysis acts by modulating the functional properties of proteins for potential food uses. The compiled literature indicates that UMPs are promising biocatalysts to generate bioactive protein hydrolysates, adding up to commercially available enzymes. From the recent interest on this topic, continuous and in-depth research is needed to advance toward the applicability and commercial utility of both UMPs and obtained hydrolysates.
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Affiliation(s)
- Adriano Brandelli
- Laboratório de Bioquímica e Microbiologia Aplicada, Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Daniel Joner Daroit
- Programa de Pós-Graduação em Ambiente e Tecnologias Sustentáveis (PPGATS), Universidade Federal da Fronteira Sul (UFFS), Cerro Largo, Brazil
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8
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Kamiński P, Szymczak M, Szymczak B. The effect of previous storage condition on the diffusion and contribution of digestive proteases in the ripening of marinated Baltic herring (Clupea harengus). Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Microbial Peptidase in Food Processing: Current State of the Art and Future Trends. Catal Letters 2022. [DOI: 10.1007/s10562-022-03965-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Arya PS, Yagnik SM, Rajput KN, Panchal RR, Raval VH. Understanding the Basis of Occurrence, Biosynthesis, and Implications of Thermostable Alkaline Proteases. Appl Biochem Biotechnol 2021; 193:4113-4150. [PMID: 34648116 DOI: 10.1007/s12010-021-03701-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 10/04/2021] [Indexed: 12/29/2022]
Abstract
The group of hydrolytic enzymes synonymously known as proteases is predominantly most favored for the class of industrial enzymes. The present work focuses on the thermostable nature of these proteolytic enzymes that occur naturally among mesophilic and thermophilic microbes. The broad thermo-active feature (40-80 °C), ease of cultivation, maintenance, and bulk production are the key features associated with these enzymes. Detailing of contemporary production technologies, and controllable operational parameters including the purification strategies, are the key features that justify their industrial dominance as biocatalysts. In addition, the rigorous research inputs by protein engineering and enzyme immobilization studies add up to the thermo-catalytic features and application capabilities of these enzymes. The work summarizes key features of microbial proteases that make them numero-uno for laundry, biomaterials, waste management, food and feed, tannery, and medical as well as pharmaceutical industries. The quest for novel and/or designed and engineered thermostable protease from unexplored sources is highly stimulating and will address the ever-increasing industrial demands.
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Affiliation(s)
- Prashant S Arya
- Department of Microbiology and Biotechnology, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Shivani M Yagnik
- Department of Microbiology and Biotechnology, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Kiransinh N Rajput
- Department of Microbiology and Biotechnology, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Rakeshkumar R Panchal
- Department of Microbiology and Biotechnology, School of Sciences, Gujarat University, Ahmedabad, 380009, India
| | - Vikram H Raval
- Department of Microbiology and Biotechnology, School of Sciences, Gujarat University, Ahmedabad, 380009, India.
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Clerici NJ, Lermen AM, Daroit DJ. Agro-industrial by-products as substrates for the production of bacterial protease and antioxidant hydrolysates. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Abstract
Proteases are ubiquitous enzymes, having significant physiological roles in both synthesis and degradation. The use of microbial proteases in food fermentation is an age-old process, which is today being successfully employed in other industries with the advent of ‘omics’ era and innovations in genetic and protein engineering approaches. Proteases have found application in industries besides food, like leather, textiles, detergent, waste management, agriculture, animal husbandry, cosmetics, and pharmaceutics. With the rising demands and applications, researchers are exploring various approaches to discover, redesign, or artificially synthesize enzymes with better applicability in the industrial processes. These enzymes offer a sustainable and environmentally safer option, besides possessing economic and commercial value. Various bacterial and fungal proteases are already holding a commercially pivotal role in the industry. The current review summarizes the characteristics and types of proteases, microbial source, their current and prospective applications in various industries, and future challenges. Promoting these biocatalysts will prove significant in betterment of the modern world.
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Chang C, Gong S, Liu Z, Yan Q, Jiang Z. High level expression and biochemical characterization of an alkaline serine protease from Geobacillus stearothermophilus to prepare antihypertensive whey protein hydrolysate. BMC Biotechnol 2021; 21:21. [PMID: 33706728 PMCID: PMC7953746 DOI: 10.1186/s12896-021-00678-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 02/03/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Proteases are important for hydrolysis of proteins to generate peptides with many bioactivities. Thus, the development of novel proteases with high activities is meaningful to discover bioactive peptides. Because natural isolation from animal, plant and microbial sources is impractical to produce large quantities of proteases, gene cloning and expression of target protease are preferred. RESULTS In this study, an alkaline serine protease gene (GsProS8) from Geobacillus stearothermophilus was successfully cloned and expressed in Bacillus subtilis. The recombinant GsProS8 was produced with high protease activity of 3807 U/mL after high cell density fermentation. GsProS8 was then purified through ammonium sulfate precipitation and a two-step chromatographic method to obtain the homogeneous protease. The molecular mass of GsProS8 was estimated to be 27.2 kDa by sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) and 28.3 kDa by gel filtration. The optimal activity of GsProS8 was found to be pH 8.5 and 50 °C, respectively. The protease exhibited a broad substrate specificity and different kinetic parameters to casein and whey protein. Furthermore, the hydrolysis of whey protein using GsProS8 resulted in a large amount of peptides with high angiotensin-I-converting enzyme (ACE) inhibitory activity (IC50 of 0.129 mg/mL). CONCLUSIONS GsProS8 could be a potential candidate for industrial applications, especially the preparation of antihypertensive peptides.
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Affiliation(s)
- Chang Chang
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing, 100083, China
| | - Siyi Gong
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing, 100083, China
| | - Zhiping Liu
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing, 100083, China
| | - Qiaojuan Yan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Engineering, China Agricultural University, Beijing, 100083, China
| | - Zhengqiang Jiang
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Food Science and Nutritional Engineering, China Agricultural University, No. 17 Qinghua Donglu, Beijing, 100083, China.
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Navone L, Speight R. Enzymatic removal of dags from livestock: an agricultural application of enzyme technology. Appl Microbiol Biotechnol 2020; 104:5739-5748. [PMID: 32405756 DOI: 10.1007/s00253-020-10656-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/23/2020] [Accepted: 04/29/2020] [Indexed: 10/24/2022]
Abstract
The effective removal of dags (manure balls) from cattle, sheep and goats is a significant issue for the livestock industry. Dags are hard recalcitrant deposits composed of materials, such as faeces, hair, soil, urine, feed and straw, and attach to the animal through the hair rather than the skin. Dags build up during wet periods, especially on long haired breeds, and can weigh up to 40 kg per animal for cattle. Dag removal prior to slaughter reduces the risk of microbial meat contamination and damage to the hide during leather processing. Existing removal methods include hair trimming or extensive hose washing that can result in stress to the animal and increased costs. An alternative solution is the application of enzyme formulations that target specific components of the dag so they are more easily removed by washing. Enzymes are already used in other cleaning applications and are proven for the breakdown of materials such as lignocellulose, protein or starch that are found in dags. This mini-review discusses the challenges of current dag removal methods and the state of the art and feasibility of applying enzyme formulations for the effective removal of dags. Although enzyme formulations are yet to be tested in large-scale cattle trials and questions remain regarding how they would be cost-effectively applied to live animals, the results at laboratory scale suggest further research is warranted. Overall, enzymes present an environmentally friendly solution to the high costs and animal welfare issues of current dag removal methods through significant reductions in cleaning time and water use. KEY POINTS: • Dag formation on livestock is a major issue for industry and for animal welfare. • Current methods are costly and challenging for operators and the animal. • Enzymes can degrade dag components to aid release with keratinases showing promise. • Dag removal needs to be field tested, and positive business cases must be generated.
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Affiliation(s)
- Laura Navone
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, Australia
| | - Robert Speight
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, Australia.
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