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Wasmund K, Singleton C, Dahl Dueholm MK, Wagner M, Nielsen PH. The predicted secreted proteome of activated sludge microorganisms indicates distinct nutrient niches. mSystems 2024:e0030124. [PMID: 39254351 DOI: 10.1128/msystems.00301-24] [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: 02/27/2024] [Accepted: 08/08/2024] [Indexed: 09/11/2024] Open
Abstract
In wastewater treatment plants (WWTPs), complex microbial communities process diverse chemical compounds from sewage. Secreted proteins are critical because many are the first to interact with or degrade external (macro)molecules. To better understand microbial functions in WWTPs, we predicted secreted proteomes of WWTP microbiota from more than 1,000 high-quality metagenome-assembled genomes (MAGs) from 23 Danish WWTPs with biological nutrient removal. Focus was placed on examining secreted catabolic exoenzymes that target major classes of macromolecules. We demonstrate that Bacteroidota has a high potential to digest complex polysaccharides, but also proteins and nucleic acids. Poorly understood activated sludge members of Acidobacteriota and Gemmatimonadota also have high capacities for extracellular polysaccharide digestion. Secreted nucleases are encoded by 61% of MAGs indicating an importance for extracellular DNA and/or RNA digestion in WWTPs. Secreted lipases were the least common macromolecule-targeting enzymes predicted, encoded mainly by Gammaproteobacteria and Myxococcota. In contrast, diverse taxa encode extracellular peptidases, indicating that proteins are widely used nutrients. Diverse secreted multi-heme cytochromes suggest capabilities for extracellular electron transfer by various taxa, including some Bacteroidota that encode undescribed cytochromes with >100 heme-binding motifs. Myxococcota have exceptionally large secreted protein complements, probably related to predatory lifestyles and/or complex cell cycles. Many Gammaproteobacteria MAGs (mostly former Betaproteobacteria) encode few or no secreted hydrolases, but many periplasmic substrate-binding proteins and ABC- and TRAP-transporters, suggesting they are mostly sustained by small molecules. Together, this study provides a comprehensive overview of how WWTPs microorganisms interact with the environment, providing new insights into their functioning and niche partitioning.IMPORTANCEWastewater treatment plants (WWTPs) are critical biotechnological systems that clean wastewater, allowing the water to reenter the environment and limit eutrophication and pollution. They are also increasingly important for the recovery of resources. They function primarily by the activity of microorganisms, which act as a "living sponge," taking up and transforming nutrients, organic material, and pollutants. Despite much research, many microorganisms in WWTPs are uncultivated and poorly characterized, limiting our understanding of their functioning. Here, we analyzed a large collection of high-quality metagenome-assembled genomes from WWTPs for encoded secreted enzymes and proteins, with special emphasis on those used to degrade organic material. This analysis showed highly distinct secreted proteome profiles among different major phylogenetic groups of microorganisms, thereby providing new insights into how different groups function and co-exist in activated sludge. This knowledge will contribute to a better understanding of how to efficiently manage and exploit WWTP microbiomes.
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Affiliation(s)
- Kenneth Wasmund
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
- Centre for Microbiology and Environmental Systems Science, Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria
- School of Biological Sciences, University of Portsmouth, Portsmouth, United Kingdom
| | - Caitlin Singleton
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
| | - Morten Kam Dahl Dueholm
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
| | - Michael Wagner
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
- Centre for Microbiology and Environmental Systems Science, Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria
| | - Per Halkjær Nielsen
- Center for Microbial Communities, Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
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Kjeldsen MH, de Evan Rozada T, Noel SJ, Schönherz A, Hellwing ALF, Lund P, Weisbjerg MR. Phenotypic traits related to methane emissions from Holstein dairy cows challenged by low or high forage proportion. J Dairy Sci 2024:S0022-0302(24)01111-1. [PMID: 39245171 DOI: 10.3168/jds.2024-24848] [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: 02/29/2024] [Accepted: 08/05/2024] [Indexed: 09/10/2024]
Abstract
Limited literature is available identifying phenotypical traits related to enteric methane (CH4) production from dairy cows, despite its relevance in relation to breeding for animals with a low CH4 yield (g/kg DMI), and the derived consequences hereof. This study aimed to investigate the relationships between CH4 yield and different animal phenotypes when 16 2nd parity dairy cows, fitted with a ruminal cannula, were fed 2 diets differing in forage:concentrate ratio in a crossover design. The diets had either a low forage proportion (35% on DM basis, F35) or a high forage proportion (63% on DM basis, F63). Gas exchange was measured by means of indirect calorimetry. Spot samples of feces were collected, and indigestible NDF (INDF) was used as an internal marker to determine total-tract digestibility. In addition, ruminal evacuations, monitoring of chewing activity, determination of ruminal VFA concentration, analysis of relative abundance of methanogens, and measurement of liquid passage rate were performed. Statistical differences were analyzed by a linear mixed model with diet, days in milk, and period as fixed effects, and cow as random effect. The random cow estimates (RCE) were extracted from the model to get the Pearson correlations (r) between RCE of CH4 yield with RCE of all other variables measured, to identify possible phenotypes related to CH4 yield. Significant correlations were observed between RCE of CH4 yield and RCE of OM digestibility (r = 0.63) and ruminal concentration of valeric acid (r = -0.61), acetic acid (r = 0.54), ammonium (r = 0.55), and lactic acid (r = ‒0.53). Additionally, tendencies were observed for correlations between RCE of CH4 yield and RCE of H2 yield in g/kg DM (r = 0.47, P = 0.07), and ruminal isobutyric acid concentration (r = 0.43, P = 0.09). No correlations were observed between RCE of CH4 yield and RCE of ruminal pool sizes, milk data, urinary measurements, or chewing activity. Cows had a lower DMI and ECM, when they were fed F63 compared with F35. Cows fed F63 had higher NDF digestibility, CH4 emissions (g/d, g/kg of DMI, and g/kg of ECM), ruminal concentration of acetic acid, ruminal pH, degradation rate of digestible NDF (DNDF, %/h), and longer rumen retention time (h). Also, rumination and total chewing time (min/kg DMI) were higher for cows fed F63. The results in the present study emphasize the positive relation between cow's ability to digest OM and their CH4 emissions. The derived consequences of breeding for lower CH4 emission might be cows with lower ability to digest OM, but more studies are warranted for further documentation of this relationship.
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Affiliation(s)
- Maria H Kjeldsen
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark.
| | - Trinidad de Evan Rozada
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark
| | - Samantha J Noel
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark
| | - Anna Schönherz
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark
| | - Anne Louise F Hellwing
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark
| | - Peter Lund
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark
| | - Martin R Weisbjerg
- Department of Animal and Veterinary Sciences, AU Viborg - Research Centre Foulum, Aarhus University, Blichers Allé 20, 8830 DK-Tjele, Denmark
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Froidurot A, Jacotot E, Julliand S, Grimm P, Julliand V. Fibrobacter sp. HC4, a newly isolated strain, demonstrates a high cellulolytic activity as revealed by enzymatic measurements and in vitro assay. Appl Environ Microbiol 2024; 90:e0051424. [PMID: 39082812 PMCID: PMC11337828 DOI: 10.1128/aem.00514-24] [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: 03/20/2024] [Accepted: 06/17/2024] [Indexed: 08/22/2024] Open
Abstract
Despite their low quantity and abundance, the cellulolytic bacteria that inhabit the equine large intestine are vital to their host, as they enable the crucial use of forage-based diets. Fibrobacter succinogenes is one of the most important intestinal cellulolytic bacteria. In this study, Fibrobacter sp. HC4, one cellulolytic strain newly isolated from the horse cecum, was characterized for its ability to utilize plant cell wall fibers. Fibrobacter sp. HC4 consumed only cellulose, cellobiose, and glucose and produced succinate and acetate in equal amounts. Among genes coding for CAZymes, 26% of the detected glycoside hydrolases (GHs) were involved in cellulolysis. These cellulases belong to the GH5, GH8, GH9, GH44, GH45, and GH51 families. Both carboxymethyl cellulase and xylanase activities of Fibrobacter sp. HC4 were detected using the Congo red method and were higher than those of F. succinogenes S85, the type strain. The in vitro addition of Fibrobacter sp. HC4 to a fecal microbial ecosystem of horses with large intestinal acidosis significantly enhanced fibrolytic activity as measured by the increase in gas and volatile fatty acids production during the first 48 h. According to this, the pH decreased and the disappearance of dry matter increased at a faster rate with Fibrobacter sp. HC4. Our data suggest a high specialization of the new strain in cellulose degradation. Such a strain could be of interest for future exploitation of its probiotic potential, which needs to be further determined by in vivo studies.IMPORTANCECellulose is the most abundant of plant cell wall fiber and can only be degraded by the large intestine microbiota, resulting in the production of volatile fatty acids that are essential for the host nutrition and health. Consequently, cellulolytic bacteria are of major importance to herbivores. However, these bacteria are challenged by various factors, such as high starch diets, which acidify the ecosystem and reduce their numbers and activity. This can lead to an imbalance in the gut microbiota and digestive problems such as colic, a major cause of mortality in horses. In this work, we characterized a newly isolated cellulolytic strain, Fibrobacter sp. HC4, from the equine intestinal microbiota. Due to its high cellulolytic capacity, reintroduction of this strain into an equine fecal ecosystem stimulates hay fermentation in vitro. Isolating and describing cellulolytic bacteria is a prerequisite for using them as probiotics to restore intestinal balance.
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Affiliation(s)
- Alicia Froidurot
- Univ. Bourgogne Franche–Comté, L’Institut Agro Dijon, PAM UMR A 02.102, Dijon, France
| | - Emmanuel Jacotot
- Univ. Bourgogne Franche–Comté, L’Institut Agro Dijon, PAM UMR A 02.102, Dijon, France
| | | | | | - Véronique Julliand
- Univ. Bourgogne Franche–Comté, L’Institut Agro Dijon, PAM UMR A 02.102, Dijon, France
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Ma L, Lyu W, Zeng T, Wang W, Chen Q, Zhao J, Zhang G, Lu L, Yang H, Xiao Y. Duck gut metagenome reveals the microbiome signatures linked to intestinal regional, temporal development, and rearing condition. IMETA 2024; 3:e198. [PMID: 39135685 PMCID: PMC11316934 DOI: 10.1002/imt2.198] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 04/18/2024] [Accepted: 04/20/2024] [Indexed: 08/15/2024]
Abstract
The duck gastrointestinal tract (GIT) harbors an abundance of microorganisms that play an important role in duck health and production. Here, we constructed the first relatively comprehensive duck gut microbial gene catalog (24 million genes) and 4437 metagenome-assembled genomes using 375 GIT metagenomic samples from four different duck breeds across five intestinal segments under two distinct rearing conditions. We further characterized the intestinal region-specific microbial taxonomy and their assigned functions, as well as the temporal development and maturation of the duck gut microbiome. Our metagenomic analysis revealed the similarity within the microbiota of the foregut and hindgut compartments, but distinctive taxonomic and functional differences between distinct intestinal segments. In addition, we found a significant shift in the microbiota composition of newly hatched ducks (3 days), followed by increased diversity and enhanced stability across growth stages (14, 42, and 70 days), indicating that the intestinal microbiota develops into a relatively mature and stable community as the host duck matures. Comparing the impact of different rearing conditions (with and without water) on duck cecal microbiota communities and functions, we found that the bacterial capacity for lipopolysaccharide biosynthesis was significantly increased in ducks that had free access to water, leading to the accumulation of pathogenic bacteria and antibiotic-resistance genes. Taken together, our findings expand the understanding of the microbiome signatures linked to intestinal regional, temporal development, and rearing conditions in ducks, which highlight the significant impact of microbiota on poultry health and production.
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Affiliation(s)
- Lingyan Ma
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐products, Institute of Agro‐product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Wentao Lyu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐products, Institute of Agro‐product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Tao Zeng
- Institute of Animal Husbandry and Veterinary MedicineZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Wen Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐products, Institute of Agro‐product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Qu Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐products, Institute of Agro‐product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Jiangchao Zhao
- Department of Animal Science, Division of AgricultureUniversity of ArkansasFayettevilleArkansasUSA
| | - Guolong Zhang
- Department of Animal and Food SciencesOklahoma State UniversityStillwaterOklahomaUSA
| | - Lizhi Lu
- Institute of Animal Husbandry and Veterinary MedicineZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Hua Yang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐products, Institute of Agro‐product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina
| | - Yingping Xiao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro‐products, Institute of Agro‐product Safety and NutritionZhejiang Academy of Agricultural SciencesHangzhouChina
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Sarpong N, Seifert J, Bennewitz J, Rodehutscord M, Camarinha-Silva A. Microbial signatures and enterotype clusters in fattening pigs: implications for nitrogen utilization efficiency. Front Microbiol 2024; 15:1354537. [PMID: 38659980 PMCID: PMC11040106 DOI: 10.3389/fmicb.2024.1354537] [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: 12/12/2023] [Accepted: 03/28/2024] [Indexed: 04/26/2024] Open
Abstract
As global demand for pork continues to rise, strategies to enhance nitrogen utilization efficiency (NUE) in pig farming have become vital for environmental sustainability. This study explored the relationship between the fecal microbiota, their metabolites, and NUE in crossbreed fattening pigs with a defined family structure. Pigs were kept under standardized conditions and fed in a two-phase feeding regime. In each phase, one fecal sample was collected from each pig. DNA was extracted from a total of 892 fecal samples and subjected to target amplicon sequencing. The results indicated an influence of sire, sampling period (SP), and sex on the fecal microbiota. Streptococcus emerged as a potential biomarker in comparing high and low NUE pigs in SP 1, suggesting a genetic predisposition to NUE regarding the fecal microbiota. All fecal samples were grouped into two enterotype-like clusters named cluster LACTO and cluster CSST. Pigs' affiliation with enterotype-like clusters altered over time and might be sex-dependent. The stable cluster CSST demonstrated the highest NUE despite containing pigs with lower performance characteristics such as average daily gain, dry matter intake, and daily nitrogen retention. This research contributes with valuable insights into the microbiome's role in NUE, paving the way for future strategies to enhance sustainable pig production.
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Affiliation(s)
- Naomi Sarpong
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
- HoLMiR - Hohenheim Center for Livestock Microbiome Research, University of Hohenheim, Stuttgart, Germany
| | - Jana Seifert
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
- HoLMiR - Hohenheim Center for Livestock Microbiome Research, University of Hohenheim, Stuttgart, Germany
| | - Jörn Bennewitz
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
- HoLMiR - Hohenheim Center for Livestock Microbiome Research, University of Hohenheim, Stuttgart, Germany
| | - Markus Rodehutscord
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
- HoLMiR - Hohenheim Center for Livestock Microbiome Research, University of Hohenheim, Stuttgart, Germany
| | - Amélia Camarinha-Silva
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
- HoLMiR - Hohenheim Center for Livestock Microbiome Research, University of Hohenheim, Stuttgart, Germany
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Liao Y, Wu S, Zhou G, Mei S, Yang Z, Li S, Jin Z, Deng Y, Wen M, Yang Y. Cellulolytic Bacillus cereus produces a variety of short-chain fatty acids and has potential as a probiotic. Microbiol Spectr 2024; 12:e0326723. [PMID: 38441475 PMCID: PMC10986558 DOI: 10.1128/spectrum.03267-23] [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: 09/04/2023] [Accepted: 01/24/2024] [Indexed: 04/06/2024] Open
Abstract
Cellulolytic bacteria ferment dietary fiber into short-chain fatty acids, which play an important role in improving fiber utilization and maintaining intestinal health. Safe and effective cellulolytic bacteria are highly promising probiotic candidates. In this study, we isolated three strains of Bacillus cereus, which exhibited cellulolytic properties, from Kele pig feces. To assess the genetic basis of cellulose degradation by the isolates, whole-genome sequencing was used to detect functional genes associated with cellulose metabolism. Subsequently, we identified that the B. cereus CL2 strain was safe in mice by monitoring body weight changes, performing histopathologic evaluations, and determining routine blood indices. We next evaluated the biological characteristics of the CL2 strain in terms of its growth, tolerance, and antibiotic susceptibility, with a focus on its ability to produce short-chain fatty acids. Finally, the intestinal flora structure of the experimental animals was analyzed to assess the intestinal environment compatibility of the CL2 strain. In this study, we isolated a cellulolytic B. cereus CL2, which has multiple cellulolytic functional genes and favorable biological characteristics, from the feces of Kele pigs. Moreover, CL2 could produce a variety of short-chain fatty acids and does not significantly affect the diversity of the intestinal flora. In summary, the cellulolytic bacterium B. cereus CL2 is a promising strain for use as a commercial probiotic or in feed supplement. IMPORTANCE Short-chain fatty acids are crucial constituents of the intestinal tract, playing an important and beneficial role in preserving the functional integrity of the intestinal barrier and modulating both immune responses and the structure of the intestinal flora. In the intestine, short-chain fatty acids are mainly produced by bacterial fermentation of cellulose. Therefore, we believe that safe and efficient cellulolytic bacteria have the potential to be novel probiotics. In this study, we systematically evaluated the safety and biological characteristics of the cellulolytic bacterium B. cereus CL2 and provide evidence for its use as a probiotic.
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Affiliation(s)
- Yixiao Liao
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Shihui Wu
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Guixian Zhou
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Shihui Mei
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Zemin Yang
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Shuang Li
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Zhengyu Jin
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Yongjun Deng
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
| | - Ming Wen
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
- Engineering Research Center of Animal Biological Products, Guiyang, China
| | - Ying Yang
- College of Animal Science, Guizhou University, Guiyang, China
- Institute of Animal Diseases, Guizhou University, Guiyang, China
- Engineering Research Center of Animal Biological Products, Guiyang, China
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Chen C, Hu H, Li Z, Qi M, Qiu Y, Hu Z, Feng F, Tang W, Diao H, Sun W, Tang Z. Dietary tryptophan improves growth and intestinal health by promoting the secretion of intestinal β-defensins against enterotoxigenic E. coli F4 in weaned piglets. J Nutr Biochem 2024:109637. [PMID: 38574828 DOI: 10.1016/j.jnutbio.2024.109637] [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: 11/23/2023] [Revised: 03/18/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
Adequate dietary L-tryptophan (Trp) governs intestinal homeostasis in piglets. However, the defensive role of Trp in the diet against enterotoxigenic E. coli F4 (K88) in pigs is still poorly understood. Here, sixty (6.15 ± 1.52 kg, 24-day-old, Duroc × Landrace × Yorkshire) weaned piglets were used for an E. coli F4 attack test in a 2 × 2 factorial design. The growth (ADG, ADFI, GH), immune factors (IL-10, IgA, IgG, IgM), Trp metabolite 5-HT, intestinal morphology (jejunal and colonic VH), mRNA expression of β-defensins (jejunal BD-127, BD-119, ileal BD-1, BD-127), and abundance of beneficial microorganisms in the colon (Prevotella 9, Lactobacillus, Phascolarctobacterium, Faecalibacterium) were higher in the piglets in the HT (High Trp) and HTK (High Trp, K88) groups than in the LT (Low Trp) and LTK (Low Trp, K88) groups (P < 0.05), while FCR, diarrhea rate, diarrhea index, serum Trp, Kyn, IDO, D-LA, ET, and abundance of harmful microorganisms in the colon (Spirochaetes, Fusobacteria, Prevotella, Christensenellaceae R7) were lower in the HT and HTK groups than in the LT and LTK groups (P < 0.05). High Trp reduced the expression of virulence genes (K88 and LT) after E. coli F4 attack (P < 0.05). The IL-6, TNF-α was lower in the HTK group than in the LT, LTK group (P < 0.05). In short, a diet containing 0.35% Trp protected piglets from enterotoxigenic E. coli F4 (K88) via Trp metabolism promoting BD expression in the intestinal mucosa, which improved growth and intestinal health.
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Affiliation(s)
- Chen Chen
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Hong Hu
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Zhangcheng Li
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Min Qi
- Yunnan Animal Husbandry Station, Kunming 650225, China
| | - Yibin Qiu
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Zhijin Hu
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Fu Feng
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Wenjie Tang
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu 610066, China; Livestock and Poultry Biological Products Key Laboratory of Sichuan Province, Sichuan Animtche Group Co., Ltd., Chengdu 610066, China
| | - Hui Diao
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Sichuan Animal Science Academy, Chengdu 610066, China; Livestock and Poultry Biological Products Key Laboratory of Sichuan Province, Sichuan Animtche Group Co., Ltd., Chengdu 610066, China
| | - Weizhong Sun
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China
| | - Zhiru Tang
- Animal Nutrition and Bio-feed, Chongqing Key Laboratory of Herbivore Science, College of Animal Science and Technology, Southwest University, Chongqing 400715, China.
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Zhu W, Chang L, Shi S, Lu N, Du S, Li J, Jiang J, Wang B. Gut microbiota reflect adaptation of cave-dwelling tadpoles to resource scarcity. THE ISME JOURNAL 2024; 18:wrad009. [PMID: 38365235 PMCID: PMC10811740 DOI: 10.1093/ismejo/wrad009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/13/2023] [Accepted: 11/15/2023] [Indexed: 02/18/2024]
Abstract
Gut microbiota are significant to the host's nutrition and provide a flexible way for the host to adapt to extreme environments. However, whether gut microbiota help the host to colonize caves, a resource-limited environment, remains unknown. The nonobligate cave frog Oreolalax rhodostigmatus completes its metamorphosis within caves for 3-5 years before foraging outside. Their tadpoles are occasionally removed from the caves by floods and utilize outside resources, providing a contrast to the cave-dwelling population. For both cave and outside tadpoles, the development-related reduction in their growth rate and gut length during prometamorphosis coincided with a shift in their gut microbiota, which was characterized by decreased Lactobacillus and Cellulosilyticum and Proteocatella in the cave and outside individuals, respectively. The proportion of these three genera was significantly higher in the gut microbiota of cave-dwelling individuals compared with those outside. The cave-dwellers' gut microbiota harbored more abundant fibrolytic, glycolytic, and fermentative enzymes and yielded more short-chain fatty acids, potentially benefitting the host's nutrition. Experimentally depriving the animals of food resulted in gut atrophy for the individuals collected outside the cave, but not for those from inside the cave. Imitating food scarcity reproduced some major microbial features (e.g. abundant Proteocatella and fermentative genes) of the field-collected cave individuals, indicating an association between the cave-associated gut microbiota and resource scarcity. Overall, the gut microbiota may reflect the adaptation of O. rhodostigmatus tadpoles to resource-limited environments. This extends our understanding of the role of gut microbiota in the adaptation of animals to extreme environments.
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Affiliation(s)
- Wei Zhu
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Liming Chang
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Shengchao Shi
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Ningning Lu
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Simeng Du
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Jiatang Li
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Jianping Jiang
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
| | - Bin Wang
- Chinese Academy of Sciences Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China
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9
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Xu X, Xu T, Wei J, Chen T. Gut microbiota: an ideal biomarker and intervention strategy for aging. MICROBIOME RESEARCH REPORTS 2024; 3:13. [PMID: 38841415 PMCID: PMC11149087 DOI: 10.20517/mrr.2023.68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 12/15/2023] [Indexed: 06/07/2024]
Abstract
Population aging is a substantial challenge for the global sanitation framework. Unhealthy aging tends to be accompanied by chronic diseases such as cardiovascular disease, diabetes, and cancer, which undermine the welfare of the elderly. Based on the fact that aging is inevitable but retarding aging is attainable, flexible aging characterization and efficient anti-aging become imperative for healthy aging. The gut microbiome, as the most dynamic component interacting with the organism, can affect the aging process through its own structure and metabolites, thus holding the potential to become both an ideal aging-related biomarker and an intervention strategy. This review summarizes the value of applying gut microbiota as aging-related microbial biomarkers in diagnosing aging state and monitoring the effect of anti-aging interventions, ultimately pointing to the future prospects of microbial intervention strategies in maintaining healthy aging.
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Affiliation(s)
- Xuan Xu
- Institution of Translational Medicine, Jiangxi Medical College, Nanchang University, Nanchang 330031, Jiangxi, China
- Huankui Academy, Jiangxi Medical College, Nanchang University, Nanchang 330031, Jiangxi, China
- Authors contributed equally
| | - Tangchang Xu
- Institution of Translational Medicine, Jiangxi Medical College, Nanchang University, Nanchang 330031, Jiangxi, China
- Authors contributed equally
| | - Jing Wei
- Institution of Translational Medicine, Jiangxi Medical College, Nanchang University, Nanchang 330031, Jiangxi, China
| | - Tingtao Chen
- Institution of Translational Medicine, Jiangxi Medical College, Nanchang University, Nanchang 330031, Jiangxi, China
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10
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Tian S, Paudel D, Hao F, Neupane R, Castro R, Patterson AD, Tiwari AK, Prabhu KS, Singh V. Refined fiber inulin promotes inflammation-associated colon tumorigenesis by modulating microbial succinate production. Cancer Rep (Hoboken) 2023; 6:e1863. [PMID: 37489647 PMCID: PMC10644334 DOI: 10.1002/cnr2.1863] [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: 04/03/2023] [Revised: 06/21/2023] [Accepted: 06/30/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND AND AIM There is an increased risk of colon cancer associated with inflammatory bowel disease (IBD). Dietary fibers (DFs) naturally present in vegetables and whole grains offer numerous beneficial effects on intestinal health. However, the effects of refined DFs on intestinal health remain unclear. Therefore, we elucidated the impact of the refined DF inulin on colonic inflammation and tumorigenesis. METHODS Four-week-old wild-type (WT) mice were fed diets containing insoluble DF cellulose (control) or refined DF inulin for 4 weeks. A subgroup of mice was then switched to drinking water containing dextran sulfate sodium (DSS, 1.4% wt/vol) for colitis induction. In another subgroup of mice, colitis-associated colorectal cancer (CRC) was initiated with three 7-day alternate cycles of DSS following an initial dose of mutagenic substance azoxymethane (AOM; 7.5 mg/kg body weight; i.p.). Post 7 weeks of AOM treatment, mice were euthanized and examined for CRC development. RESULTS Mice consuming inulin-containing diet exhibited severe colitis upon DSS administration, as evidenced by more body weight loss, rectal bleeding, and increased colonic inflammation than the DSS-treated control group. Correspondingly, histological analysis revealed extensive disruption of colon architecture and massive infiltration of immune cells in the inulin-fed group. We next examined the effect of inulin on CRC development. Surprisingly, significant mortality (~50%) was observed in the inulin-fed but not in the control group during the DSS cycle. Consequently, the remaining inulin-fed mice, which completed the study exhibited extensive colon tumorigenesis. Immunohistochemical characterization showed comparatively high expression of the cell proliferation marker Ki67 and activation of the Wnt signaling in tumor sections obtained from the inulin-fed group. Gut microbiota and metabolite analysis revealed expansion of succinate producers and elevated cecal succinate in inulin-fed mice. Human colorectal carcinoma cells (HCT116) proliferated more rapidly when supplemented with succinate in an inflamed environment, suggesting that elevated luminal succinate may contribute to tumorigenesis. CONCLUSIONS Our study uncovers that supplementation of diet with refined inulin induces abnormal succinate accumulation in the intestinal lumen, which in part contributes to promoting colon inflammation and tumorigenesis.
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Affiliation(s)
- Sangshan Tian
- Department of Nutritional SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
| | - Devendra Paudel
- Department of Nutritional SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
| | - Fuhua Hao
- Department of Veterinary and Biomedical SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
| | - Rabin Neupane
- Department of Pharmacology and Experimental TherapeuticsUniversity of ToledoToledoOhioUSA
| | - Rita Castro
- Department of Nutritional SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
| | - Andrew D. Patterson
- Department of Veterinary and Biomedical SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
| | - Amit K. Tiwari
- Department of Pharmacology and Experimental TherapeuticsUniversity of ToledoToledoOhioUSA
| | - K. Sandeep Prabhu
- Department of Veterinary and Biomedical SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
| | - Vishal Singh
- Department of Nutritional SciencesThe Pennsylvania State UniversityUniversity ParkPennsylvaniaUSA
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11
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Thorel M, Obregon D, Mulot B, Maitre A, Mateos-Hernandez L, Moalic PY, Wu-Chuang A, Cabezas-Cruz A, Leclerc A. Conserved core microbiota in managed and free-ranging Loxodonta africana elephants. Front Microbiol 2023; 14:1247719. [PMID: 37860133 PMCID: PMC10582353 DOI: 10.3389/fmicb.2023.1247719] [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: 06/26/2023] [Accepted: 08/30/2023] [Indexed: 10/21/2023] Open
Abstract
The gut microbiota plays a crucial role in animal health and homeostasis, particularly in endangered species conservation. This study investigated the fecal microbiota composition of European captive-bred African savanna elephants (Loxodonta africana) housed in French zoos, and compared it with wild African savanna elephants. Fecal samples were collected and processed for DNA extraction and amplicon sequencing of the 16S rRNA gene. The analysis of α and β diversity revealed significant effects of factors such as diet, daily activity, and institution on microbiota composition. Specifically, provision of branches as part of the diet positively impacted microbiota diversity. Comparative analyses demonstrated distinct differences between captive and wild elephant microbiomes, characterized by lower bacterial diversity and altered co-occurrence patterns in the captive population. Notably, specific taxa were differentially abundant in captive and wild elephants, suggesting the influence of the environment on microbiota composition. Furthermore, the study identified a core association network shared by both captive and wild elephants, emphasizing the importance of certain taxa in maintaining microbial interactions. These findings underscore the impact of environment and husbandry factors on elephant gut microbiota, highlighting the benefits of dietary enrichment strategies in zoos to promote microbiome diversity and health. The study contributes to the broader understanding of host-microbiota interactions and provides insights applicable to conservation medicine and captive animal management.
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Affiliation(s)
- Milan Thorel
- ZooParc de Beauval and Beauval Nature, Saint-Aignan, France
| | - Dasiel Obregon
- School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
| | - Baptiste Mulot
- ZooParc de Beauval and Beauval Nature, Saint-Aignan, France
| | - Apolline Maitre
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Lourdes Mateos-Hernandez
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | | | - Alejandra Wu-Chuang
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Alejandro Cabezas-Cruz
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
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12
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Du T, Li P, Niu Q, Pu G, Wang B, Liu G, Li P, Niu P, Zhang Z, Wu C, Hou L, Hedemann MS, Zhao Q, Huang R. Effects of Varying Levels of Wheat Bran Dietary Fiber on Growth Performance, Fiber Digestibility and Gut Microbiota in Erhualian and Large White Pigs. Microorganisms 2023; 11:2474. [PMID: 37894132 PMCID: PMC10609096 DOI: 10.3390/microorganisms11102474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 10/29/2023] Open
Abstract
To evaluate the tolerance of a high-fiber diet in Erhualian pigs (Er-HL), the present investigation systematically investigated the ramifications of varying wheat bran fiber levels, specified as total dietary fiber (TDF) values of 14.07%, 16.32%, 17.99%, and 18.85%, on growth performance, fiber digestibility and gut microbiota in Er-HL, large Large White pigs (L-LW, the same physiological stage as the Er-HL) and small Large White pigs (S-LW, the same body weight as the Er-HL). Our results revealed that fiber levels exerted no discernable impact on growth performance (average daily feed intake (ADFI), and average daily gain (ADG)) of Er-HL (p > 0.05). Conversely, L-LW exhibited a decrease in ADFI and ADG with increasing fiber levels (p < 0.05). Notably, the apparent total tract digestibility (ATTD) of various fiber components, including neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose, TDF and insoluble dietary fiber (IDF), in Er-HL were significantly higher than those in S-LW and L-LW irrespective of diets (p < 0.05). The ATTD of cellulose and hemicellulose in Er-HL significantly decreased with increasing fiber levels (p < 0.05), yet remained statistically indifferent when comparing the 7%-wheat-bran-replaced diet (7% WRB, TDF 16.32%) to the basal diet (TDF 14.07%) (p > 0.05). The cecal microbiota of Er-HL had higher richness estimators (Chao1 and ACE) than those of S-LW and L-LW irrespective of diets (p < 0.01). Breed serves as a pivotal determinant in shaping swine gut microbiota. Thirteen genera were selected as the key bacteria related to high fiber digestibility of Er-HL. Further functional examination of these key genera elucidated an enrichment of pathways pertinent to carbohydrate metabolism in Er-HL samples compared with S-LW and L-LW samples. In summary, Er-HL exhibited high-fiber tolerance both in terms of growth performance and fiber digestibility compared with Large White pigs. Specifically, the ATTD of NDF, ADF, hemicellulose, IDF and TDF were significantly higher in Er-HL compared with L-LW and S-LW, irrespective of diets. Fiber level exerted no discernable impact on growth performance (ADFI, ADG) and the ATTD of fiber (NDF, ADF, IDF and TDF) in Er-HL. The optimum fiber level of the Er-HL was identified as 7% WRB (TDF 16.32%). Thirteen genera were ascertained to significantly contribute to high fiber digestibility of Er-HL, correlating with an enhancement of carbohydrate metabolism pathways.
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Affiliation(s)
- Taoran Du
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
| | - Pinghua Li
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - Qing Niu
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
- Institute of Animal Husbandry and Veterinary Science, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Guang Pu
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
| | - Binbin Wang
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
| | - Gensheng Liu
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
| | - Pinghui Li
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
| | - Peipei Niu
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - Zongping Zhang
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - Chengwu Wu
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | - Liming Hou
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
| | | | - Qingbo Zhao
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
| | - Ruihua Huang
- Key Laboratory of Evaluation and Utilization of Livestock and Poultry Resources (Pig) of Ministry of Agriculture and Rural Affairs, Institute of Swine Science, College of Animal Science & Technology, Nanjing Agricultural University, Nanjing 210095, China; (T.D.); (P.L.)
- Huaian Academy, Nanjing Agricultural University, Huaian 223005, China
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González-Rojo S, Díez-Antolínez R. Production of polyhydroxyalkanoates as a feasible alternative for an integrated multiproduct lignocellulosic biorefinery. BIORESOURCE TECHNOLOGY 2023; 386:129493. [PMID: 37460022 DOI: 10.1016/j.biortech.2023.129493] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/23/2023]
Abstract
Polyhydroxyalkanoates (PHAs) are considered an alternative to fossil fuel-based plastics. However, in spite of their interesting properties and their multiple applications, PHAs have not taken off as an industrial development. The reason is mainly due to the associated high-production costs, which represent a significant constraint. In recent years, the interest in lignocellulosic biomass (LCB) derived from crop, forestry or municipal waste by-products has been growing, since LCB is plentiful, cheap, renewable and sustainable. On this matter, the valorization of LCB into PHAs represents a promising route within circular economy strategies. However, much effort still needs to be made to improve the bioconversion yields and to enhance PHA production efficiency. So, this review focuses on reviewing the different options for PHA synthesis from LCB, stressing the progress in biomass deconstruction, enzymatic hydrolysis and microbial conversion. In addition, some of the current biological strategies for improving the process of bioconversion are discussed.
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Affiliation(s)
- S González-Rojo
- Centro de Biocombustibles y Bioproductos, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Polígono Agroindustrial del Órbigo p. 2-6, Villarejo de Órbigo, León 24358, Spain.
| | - R Díez-Antolínez
- Centro de Biocombustibles y Bioproductos, Instituto Tecnológico Agrario de Castilla y León (ITACyL), Polígono Agroindustrial del Órbigo p. 2-6, Villarejo de Órbigo, León 24358, Spain
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14
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Duan Y, Huang J, Sun M, Jiang Y, Wang S, Wang L, Yu N, Peng D, Wang Y, Chen W, Zhang Y. Poria cocos polysaccharide improves intestinal barrier function and maintains intestinal homeostasis in mice. Int J Biol Macromol 2023; 249:125953. [PMID: 37517750 DOI: 10.1016/j.ijbiomac.2023.125953] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/28/2023] [Accepted: 07/21/2023] [Indexed: 08/01/2023]
Abstract
The function of the intestinal tract is critical to human health. Poria cocos is a widely used functional edible fungus in Asia and has been reported to modulate gastrointestinal function. However, the effects of polysaccharides, the main active constituents of Poria cocos, on the intestinal tract remains unclear and is the focus of the study. Poria cocos polysaccharides (PCP) were extracted, characterized, and administered to mice by gavage. The results show that PCP used in this study has a typical polysaccharide peak with a molecular weight of 11.583 kDa and is composed primarily of mannose, D-glucosamine hydrochloride, glucose, galactose, and fucose with a molar ratio of 15.308: 0.967: 28.723: 31.631: 23.371. The methylation results suggest that the PCP backbone may be t-Gal(p), 6-Gal(p) and 2,6-Gal(p). The effects of PCP on the mucosal barrier function of the mouse intestine (duodenum, jejunum, and ileum) were examined in terms of intestinal physiological status, physical barrier, biochemical barrier, immune barrier, and microbial barrier. The results showed that PCP significantly improved the physiological state of mouse intestine. Moreover, PCP strengthened the intestinal physical barrier by upregulating the expression of intestinal Occludin and ZO-1 and downregulating the levels of serum endotoxin, DAO, D-lactate, and intestinal MPO. Regarding biochemical barrier, PCP could upregulate the expression of MUC2, β-defensin, and SIgA in intestinal tissues. In addition, PCP modulated the immune barrier by increasing IL-2, IL-4, IL-6, IL-10, TGF-β, and IFN-γ expression. Besides, PCP increased the level of SCFAs in small intestinal contents. PCP modulates intestinal barrier function by altering the microbial composition of the gut. We also found that PCP could maintain intestinal barrier function by increasing the expression of Wnt/β-Catenin and Lrp5 proteins. Generally, our findings suggested that PCP may be used as a functional food to regulate intestinal mucosal function, thereby enhancing the health of the intestinal and host.
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Affiliation(s)
- Yuting Duan
- School of Pharmacy, Anhui University of Chinese Medicine, China
| | - Jiajing Huang
- School of Pharmacy, Anhui University of Chinese Medicine, China
| | - Mingjie Sun
- School of Pharmacy, Anhui University of Chinese Medicine, China
| | - Yuehang Jiang
- School of Pharmacy, Anhui University of Chinese Medicine, China
| | - Shihan Wang
- School of Pharmacy, Anhui University of Chinese Medicine, China
| | - Lei Wang
- School of Pharmacy, Anhui University of Chinese Medicine, China; MOE-Anhui Joint Collaborative Innovation Center for Quality Improvement of Anhui Genuine Chinese Medicinal Materials, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, China
| | - Nianjun Yu
- School of Pharmacy, Anhui University of Chinese Medicine, China
| | - Daiyin Peng
- School of Pharmacy, Anhui University of Chinese Medicine, China; MOE-Anhui Joint Collaborative Innovation Center for Quality Improvement of Anhui Genuine Chinese Medicinal Materials, China; Institute of Traditional Chinese Medicine Resources Protection and Development, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, China
| | - Yanyan Wang
- School of Pharmacy, Anhui University of Chinese Medicine, China.
| | - Weidong Chen
- School of Pharmacy, Anhui University of Chinese Medicine, China; MOE-Anhui Joint Collaborative Innovation Center for Quality Improvement of Anhui Genuine Chinese Medicinal Materials, China; Institute of Traditional Chinese Medicine Resources Protection and Development, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, China; Anhui Province Key Laboratory of Traditional Chinese Medicine Decoction Pieces of New Manufacturing Technology, China.
| | - Yue Zhang
- School of Pharmacy, Anhui University of Chinese Medicine, China.
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15
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Grozina AA, Ilina LA, Laptev GY, Yildirim EA, Ponomareva ES, Filippova VA, Tyurina DG, Fisinin VI, Kochish II, Griffin DK, Surai PF, Romanov MN. Probiotics as an alternative to antibiotics in modulating the intestinal microbiota and performance of broiler chickens. J Appl Microbiol 2023; 134:lxad213. [PMID: 37715326 DOI: 10.1093/jambio/lxad213] [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: 08/01/2023] [Revised: 09/02/2023] [Accepted: 09/13/2023] [Indexed: 09/17/2023]
Abstract
AIMS Gut bacteria play an important role in poultry nutrition and the immune defense system. Changes in the intestinal microbiome affect the physiological state, metabolism, and innate immunity of poultry. The present study aimed to characterize age-related changes in the gastrointestinal tract microflora in broiler chickens, depending on supplementation of the diet with the in-feed antibiotic Stafac® 110 and a Bacillus subtilis strain-based probiotic. METHODS AND RESULTS In this regard, a comprehensive analysis of the taxonomic structure of the microbial community in the gastrointestinal tract (GIT) of broiler chickens was carried out using a molecular genetic technique of the terminal-restriction fragment length polymorphism analysis and taking into account age dynamics and feeding treatment. A beneficial effect on the microbiological composition and body weight of broilers was observed when using the antibiotic and probiotic in compound feeds. Different bacterial communities were revealed in the duodenum and cecum, and their positive impact on broiler growth was established. The results obtained shed light on the formation of GIT microflora of broiler chickens during the growing period and its changes in response to the use of the antibiotic and the probiotic. CONCLUSIONS We suggest that the implementation of the tested in-feed antibiotic and probiotic can be beneficial in regulating the intestinal microflora microbiological processes in the GIT and improving the feeding efficiency and productivity of broiler chickens.
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Affiliation(s)
- Alena A Grozina
- Federal Scientific Center "All-Russia Research and Technological Poultry Institute", Russian Academy of Sciences, Sergiev Posad, Moscow Oblast 141311, Russia
| | - Larisa A Ilina
- Federal State Budgetary Educational Institution of Higher Education "St. Petersburg State Agrarian University", Pushkin, St. Petersburg 196601, Russia
- BIOTROF LLC, Pushkin, St. Petersburg 196602, Russia
| | - Georgiy Yu Laptev
- Federal State Budgetary Educational Institution of Higher Education "St. Petersburg State Agrarian University", Pushkin, St. Petersburg 196601, Russia
- BIOTROF LLC, Pushkin, St. Petersburg 196602, Russia
| | - Elena A Yildirim
- Federal State Budgetary Educational Institution of Higher Education "St. Petersburg State Agrarian University", Pushkin, St. Petersburg 196601, Russia
- BIOTROF LLC, Pushkin, St. Petersburg 196602, Russia
| | | | - Valentina A Filippova
- Federal State Budgetary Educational Institution of Higher Education "St. Petersburg State Agrarian University", Pushkin, St. Petersburg 196601, Russia
- BIOTROF LLC, Pushkin, St. Petersburg 196602, Russia
| | | | - Vladimir I Fisinin
- Federal Scientific Center "All-Russia Research and Technological Poultry Institute", Russian Academy of Sciences, Sergiev Posad, Moscow Oblast 141311, Russia
| | - Ivan I Kochish
- K. I. Skryabin Moscow State Academy of Veterinary Medicine and Biotechnology, Moscow 109472, Russia
| | - Darren K Griffin
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, United Kingdom
| | - Peter F Surai
- Vitagene and Health Research Centre, Bristol BS4 2RS, United Kingdom
- Department of Microbiology and Biochemistry, Faculty of Veterinary Medicine, Trakia University, 6000 Stara Zagora, Bulgaria
- Department of Animal Nutrition, Faculty of Agricultural and Environmental Sciences, Szent Istvan University, H-2103 Gödöllo, Hungary
| | - Michael N Romanov
- School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, United Kingdom
- L. K. Ernst Federal Research Center for Animal Husbandry, Dubrovitsy, Podolsk, Moscow Oblast 142132, Russia
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16
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Pandey S, Kim ES, Cho JH, Song M, Doo H, Kim S, Keum GB, Kwak J, Ryu S, Choi Y, Kang J, Lee JJ, Kim HB. Swine gut microbiome associated with non-digestible carbohydrate utilization. Front Vet Sci 2023; 10:1231072. [PMID: 37533451 PMCID: PMC10390834 DOI: 10.3389/fvets.2023.1231072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/04/2023] [Indexed: 08/04/2023] Open
Abstract
Non-digestible carbohydrates are an unavoidable component in a pig's diet, as all plant-based feeds contain different kinds of non-digestible carbohydrates. The major types of non-digestible carbohydrates include non-starch polysaccharides (such as cellulose, pectin, and hemicellulose), resistant starch, and non-digestible oligosaccharides (such as fructo-oligosaccharide and xylo-oligosaccharide). Non-digestible carbohydrates play a significant role in balancing the gut microbial ecology and overall health of the swine by promoting the production of short chain fatty acids. Although non-digestible carbohydrates are rich in energy, swine cannot extract this energy on their own due to the absence of enzymes required for their degradation. Instead, they rely on gut microbes to utilize these carbohydrates for energy production. Despite the importance of non-digestible carbohydrate degradation, limited studies have been conducted on the swine gut microbes involved in this process. While next-generation high-throughput sequencing has aided in understanding the microbial compositions of the swine gut, specific information regarding the bacteria involved in non-digestible carbohydrate degradation remains limited. Therefore, it is crucial to investigate and comprehend the bacteria responsible for the breakdown of non-digestible carbohydrates in the gut. In this mini review, we have discussed the major bacteria involved in the fermentation of different types of non-digestible carbohydrates in the large intestine of swine, shedding light on their potential roles and contributions to swine nutrition and health.
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Affiliation(s)
- Sriniwas Pandey
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Eun Sol Kim
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Jin Ho Cho
- Division of Food and Animal Science, Chungbuk National University, Cheongju, Republic of Korea
| | - Minho Song
- Division of Animal and Dairy Science, Chungnam National University, Daejeon, Republic of Korea
| | - Hyunok Doo
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Sheena Kim
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Gi Beom Keum
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Jinok Kwak
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Sumin Ryu
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Yejin Choi
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Juyoun Kang
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
| | - Jeong Jae Lee
- Institute of Agricultural Science and Technology, Kyungpook National University, Daegu, Republic of Korea
| | - Hyeun Bum Kim
- Department of Animal Resources Science, Dankook University, Cheonan, Republic of Korea
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17
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Ma Y, Han L, Raza SHA, Gui L, Zhang X, Hou S, Sun S, Yuan Z, Wang Z, Yang B, Hassan MM, Alghsham RS, Al Abdulmonem W, Alkhalil SS. Exploring the effects of palm kernel meal feeding on the meat quality and rumen microorganisms of Qinghai Tibetan sheep. Food Sci Nutr 2023; 11:3516-3534. [PMID: 37324863 PMCID: PMC10261763 DOI: 10.1002/fsn3.3340] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/11/2023] [Accepted: 03/14/2023] [Indexed: 10/03/2023] Open
Abstract
Palm kernel meal (PKM) has been shown to be a high-quality protein source in ruminant feeds. This study focused on the effects of feed, supplemented with different amounts of PKM (ZL-0 as blank group, and ZL-15, ZL-18, and ZL-21 as treatment group), on the quality and flavor profile of Tibetan sheep meat. Furthermore, the deposition of beneficial metabolites in Tibetan sheep and the composition of rumen microorganisms on underlying regulatory mechanisms of meat quality were studied based on ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry as well as 16S rDNA sequencing. The results of the study showed that Tibetan sheep in the ZL-18 group exhibited superior eating quality and flavor profile while depositing more protein and fat relative to the other groups. The ZL-18 group also changed significantly in terms of the concentration and metabolic pathways of meat metabolites, as revealed by metabolomics. Metabolomics and correlation analyses finally showed that PKM feed mainly affected carbohydrate metabolism in muscle, which in turn affects meat pH, tenderness, and flavor. In addition, 18% of PKM increased the abundance of Christensenellaceae R-7 group, Ruminococcaceae UCG-013, Lachnospiraceae UCG-002, and Family XIII AD3011 group in the rumen but decreased the abundance of Prevotella 1; the above bacteria groups regulate meat quality by regulating rumen metabolites (succinic acid, DL-glutamic acid, etc.). Overall, the addition of PKM may improve the quality and flavor of the meat by affecting muscle metabolism and microorganisms in the rumen.
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Affiliation(s)
- Ying Ma
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Lijuan Han
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Sayed Haidar Abbas Raza
- Guangdong Provincial Key Laboratory of Food Quality and Safety/Nation‐Local Joint Engineering Research Center for Machining and Safety of Livestock and Poultry ProductsSouth China Agricultural UniversityGuangzhou510642China
- College of Animal Science and Technology, Northwest A&F UniversityYangling712100ShaanxiPeople's Republic of China
| | - Linsheng Gui
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Xue Zhang
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Shengzhen Hou
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Shengnan Sun
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Zhenzhen Yuan
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Zhiyou Wang
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Baochun Yang
- College of Agriculture and Animal Husbandry, Qinghai University XiningXining810016People's Republic of China
| | - Mohamed M. Hassan
- Department of BiologyCollege of Science, Taif UniversityP.O. Box 11099Taif21944Saudi Arabia
| | - Ruqaih S. Alghsham
- Department of PathologyCollege of Medicine, Qassim UniversityQassimSaudi Arabia
| | - Waleed Al Abdulmonem
- Department of PathologyCollege of Medicine, Qassim UniversityP.O. Box 6655Buraidah51452Kingdom of Saudi Arabia
| | - Samia S. Alkhalil
- Department of Clinical Laboratory SciencesCollege of Applied Medical Sciences, Shaqra UniversityAlquwayiyahRiyadhSaudi Arabia
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18
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Zhang Y, Wang L, Wang ZD, Zhou Q, Zhou X, Zhou T, Guan YX, Liu X. Surface-anchored microbial enzyme-responsive solid lipid nanoparticles enabling colonic budesonide release for ulcerative colitis treatment. J Nanobiotechnology 2023; 21:145. [PMID: 37127609 PMCID: PMC10152766 DOI: 10.1186/s12951-023-01889-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 04/10/2023] [Indexed: 05/03/2023] Open
Abstract
Colon-targeted oral drug delivery systems (CDDSs) are desirable for the treatment of ulcerative colitis (UC), which is a disease with high relapse and remission rates associated with immune system inflammation and dysregulation localized within the lining of the large bowel. However, the success of current available approaches used for colon-targeted therapy is limited. Budesonide (BUD) is a corticosteroid drug, and its rectal and oral formulations are used to treat UC, but the inconvenience of rectal administration and the systemic toxicity of oral administration restrict its long-term use. In this study, we designed and prepared colon-targeted solid lipid nanoparticles (SLNs) encapsulating BUD to treat UC by oral administration. A negatively charged surfactant (NaCS-C12) was synthesized to anchor cellulase-responsive layers consisting of polyelectrolyte complexes (PECs) formed by negatively charged NaCS and cationic chitosan onto the SLNs. The release rate and colon-specific release behavior of BUD could be easily modified by regulating the number of coated layers. We found that the two-layer BUD-loaded SLNs (SLN-BUD-2L) with a nanoscale particle size and negative zeta potential showed the designed colon-specific drug release profile in response to localized high cellulase activity. In addition, SLN-BUD-2L exhibited excellent anti-inflammatory activity in a dextran sulfate sodium (DSS)-induced colitis mouse model, suggesting its potential anti-UC applications.
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Affiliation(s)
- Yipeng Zhang
- Department of Pharmacology and Department of Radiology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, China
- Zhejiang Key Laboratory of Smart Biomaterials, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
- Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, 314100, China
| | - Liying Wang
- Department of General Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, China
| | - Zi-Dan Wang
- Zhejiang Key Laboratory of Smart Biomaterials, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Quan Zhou
- Department of Cell Biology, Zhejiang University School of Medicine, Hangzhou, 310058, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang University School of Medicine, Yiwu, 322000, China
| | - Xuefei Zhou
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang University School of Medicine, Yiwu, 322000, China
| | - Tianhua Zhou
- Department of Cell Biology, Zhejiang University School of Medicine, Hangzhou, 310058, China
- Cancer Center, Zhejiang University, Hangzhou, 310058, China
| | - Yi-Xin Guan
- Zhejiang Key Laboratory of Smart Biomaterials, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xiangrui Liu
- Department of Pharmacology and Department of Radiology of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, China.
- Zhejiang Key Laboratory of Smart Biomaterials, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
- Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, 314100, China.
- Cancer Center, Zhejiang University, Hangzhou, 310058, China.
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19
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Kural T, Grajciarová M, Rosendorf J, Pálek R, Červenková L, Malečková A, Šarčevic S, Liška V, Tonar Z. Histological mapping of healing of the small and large intestine – a quantitative study in a porcine model. Ann Anat 2023; 249:152095. [PMID: 37011825 DOI: 10.1016/j.aanat.2023.152095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 03/02/2023] [Accepted: 03/22/2023] [Indexed: 04/04/2023]
Abstract
BACKGROUND Gastrointestinal anastomoses are performed in many patients every year. The pathogenesis of aberrant anastomotic healing and the causes of intestinal leakage are not fully understood. The present study gathered and critically evaluated histological quantitative data to deepen current knowledge of anastomotic healing in the small and large intestine and its complications and outline the options for further experimental in vivo research in large porcine animal models. METHODS Three groups of porcine intestinal anastomoses were compared: small intestine without defect (SI; n=7), small intestine with an additional defect (SID; n=8), and large intestine (LI; n=7). Multilevel sampling (2,112 micrographs) and stereological methods were used for histological quantification of proliferation (Ki-67 immunohistochemistry), neutrophil infiltration (myeloperoxidase staining), vascularity (von Willebrand factor) and type I and type III collagen formation (picrosirius red in polarized light) within the region of anastomosis compared to the region outside of anastomosis. RESULTS Quantitative histological evaluation revealed the following results. i) Proliferation, vascularity, and collagen, but not neutrophils, were more highly expressed within the anastomosis than outside of the anastomosis region. ii) Porcine large and small intestine were not interchangeable based on histological evaluation of surgical experiments. The presence or absence of an additional experimental defect strongly affected healing, but the healing seemed complete after 21 days. iii) The microscopic structure of small intestine segments was more affected by their proximity to the anastomosis than the structure of large intestine segments. CONCLUSIONS Histological quantification was more laborious than the previously used semiquantitative scoring system evaluating the healing rate of intestinal anastomoses, but it provided detailed maps of biological processes within individual intestine layers. The primary data collected in the study are open and available for power sample analyses to calculate the minimum numbers of samples justified in future experiments on porcine intestines. The porcine intestine is a promising animal model with translational potential for human surgery.
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Singh R, Saati AA, Faidah H, Bantun F, Jalal NA, Haque S, Rai AK, Srivastava M. Prospects of microbial cellulase production using banana peels wastes for antimicrobial applications. Int J Food Microbiol 2023; 388:110069. [PMID: 36640563 DOI: 10.1016/j.ijfoodmicro.2022.110069] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 11/14/2022] [Accepted: 12/27/2022] [Indexed: 01/01/2023]
Abstract
Microorganisms have been extensively studied and used to produce a wide range of enzymes and bioactive substances for a number of uses. Cellulases have also been widely used for a variety of bioprocessing and biotransformation purposes and are acknowledged as the essential enzymes for industrial applications. Broad industrial applications and huge demand essentially require mass-scale and low-cost production of cellulase enzyme. Nevertheless, low-cost production of cellulase enzyme at industrial-level finds certain issues, and this may be mainly associated with the unavailability of cheap and effective substrate to be utilized in fermentation process. In this context, cellulosic wastes are counted as one of the suitable bioresources and have been well explored for low-cost and highly efficient cellulase enzyme productions. Further, banana peels waste is considered as the high cellulose & sugar containing food wastes which is renewable and hugely available worldwide. Therefore, the present review explores the possible utilizations of banana peels as a potential food waste to be employed as substrate to produce cellulase enzymes. Availability and compositional analysis of banana peels has been explored for the microbial cellulase production based on reported studies. Further, this review explores the applications of cellulase enzymes as antimicrobial agents. Based on the available studies and their evaluation, potential limitations and future suggestions for the production of cellulase enzymes and their applications as antibacterial agents have been provided, which have a high potential for numerous biomedical applications and may offer a new opportunity for industrial utility.
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Affiliation(s)
- Rajeev Singh
- Department of Environmental Studies, Satyawati College, University of Delhi, Delhi 110052, India; Department of Environmental Science, Jamia Millia Islamia, (A Central University), New Delhi 110025, India
| | - Abdullah Ali Saati
- Department of Community Medicine & Pilgrims Healthcare, Faculty of Medicine, Umm Al-Qura University, Saudi Arabia
| | - Hani Faidah
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Farkad Bantun
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Naif A Jalal
- Department of Microbiology, Faculty of Medicine, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan 45142, Saudi Arabia; Centre of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman, United Arab Emirates
| | - Ashutosh Kumar Rai
- Department of Biochemistry, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Manish Srivastava
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi, Varanasi 221005, India; LCB Fertilizers Pvt. Ltd., Shyam Vihar Phase 2, Rani Sati Mandir Road, Lachchhipur, Gorakhpur, Uttar Pradesh-273015, India.
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21
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Chen Y, Lai Y, Zheng J, Liu Z, Nong D, Liang J, Li Y, Huang Z. Seasonal variations in the gut microbiota of white-headed black langur (Trachypithecus leucocephalus) in a limestone forest in Southwest Guangxi, China. Front Ecol Evol 2023. [DOI: 10.3389/fevo.2023.1126243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Investigating gut microbiota is important for understanding the physiological adaptation of animals to food availability changes in fragmented habitats and consequently providing new ideas for the conservation of endangered wild animals. In this study, we explored the gut microbiota of the endangered white-headed black langur (Trachypithecus leucocephalus), which is endemic to the limestone forests of Southwest Guangxi, China, to understand its adaptation strategies to seasonal changes in habitat using 16S rRNA sequencing. Our results revealed significant seasonal variations in the gut microbiota of white-headed black langurs. In particular, the alpha diversity was higher in the rainy season than in the dry season, and the beta diversity was significantly different between the two seasons. At the phylum level, the relative abundance of Firmicutes, Actinobacteriota, and Proteobacteria was higher in the dry season than that in the rainy season, whereas that of Bacteroidetes, Spirochaetota, and Cyanobacteria was significantly higher in the rainy season than that in the dry season. At the family level, Oscillospiraceae and Eggerthellaceae were more abundant in the dry season than in the rainy season, whereas Lachnospiraceae, Ruminococcaceae, and Monoglobaceae were more abundant in the rainy season than in the dry season. These results could have been obtained due to seasonal changes in the diet of langurs in response to food plant phenology. In addition, the neutral community model revealed that the gut microbiota assembly of these langurs was dominated by deterministic processes and was more significantly affected by ecological factors in the dry season than in the rainy season, which could be linked to the higher dependence of these langurs on mature leaves in the dry season. We concluded that the seasonal variations in the gut microbiota of white-headed black langurs occurred in response to food plant phenology in their habitat, highlighting the importance of microbiota in responding to fluctuating ecological factors and adapting to seasonal dietary changes.
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22
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McCoubrey LE, Favaron A, Awad A, Orlu M, Gaisford S, Basit AW. Colonic drug delivery: Formulating the next generation of colon-targeted therapeutics. J Control Release 2023; 353:1107-1126. [PMID: 36528195 DOI: 10.1016/j.jconrel.2022.12.029] [Citation(s) in RCA: 45] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/08/2022] [Accepted: 12/10/2022] [Indexed: 12/26/2022]
Abstract
Colonic drug delivery can facilitate access to unique therapeutic targets and has the potential to enhance drug bioavailability whilst reducing off-target effects. Delivering drugs to the colon requires considered formulation development, as both oral and rectal dosage forms can encounter challenges if the colon's distinct physiological environment is not appreciated. As the therapeutic opportunities surrounding colonic drug delivery multiply, the success of novel pharmaceuticals lies in their design. This review provides a modern insight into the key parameters determining the effective design and development of colon-targeted medicines. Influential physiological features governing the release, dissolution, stability, and absorption of drugs in the colon are first discussed, followed by an overview of the most reliable colon-targeted formulation strategies. Finally, the most appropriate in vitro, in vivo, and in silico preclinical investigations are presented, with the goal of inspiring strategic development of new colon-targeted therapeutics.
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Affiliation(s)
- Laura E McCoubrey
- 29 - 39 Brunswick Square, UCL School of Pharmacy, University College London, London, WC1N 1AX, UK
| | - Alessia Favaron
- 29 - 39 Brunswick Square, UCL School of Pharmacy, University College London, London, WC1N 1AX, UK
| | - Atheer Awad
- 29 - 39 Brunswick Square, UCL School of Pharmacy, University College London, London, WC1N 1AX, UK
| | - Mine Orlu
- 29 - 39 Brunswick Square, UCL School of Pharmacy, University College London, London, WC1N 1AX, UK
| | - Simon Gaisford
- 29 - 39 Brunswick Square, UCL School of Pharmacy, University College London, London, WC1N 1AX, UK
| | - Abdul W Basit
- 29 - 39 Brunswick Square, UCL School of Pharmacy, University College London, London, WC1N 1AX, UK.
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23
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Li M, Wang Y, Guo C, Wang S, Zheng L, Bu Y, Ding K. The claim of primacy of human gut Bacteroides ovatus in dietary cellobiose degradation. Gut Microbes 2023; 15:2227434. [PMID: 37349961 PMCID: PMC10291918 DOI: 10.1080/19490976.2023.2227434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 06/14/2023] [Indexed: 06/24/2023] Open
Abstract
A demonstration of cellulose degrading bacterium from human gut changed our view that human cannot degrade the cellulose. However, investigation of cellulose degradation by human gut microbiota on molecular level has not been completed so far. We showed here, using cellobiose as a model that promoted the growth of human gut key members, such as Bacteroides ovatus (BO), to clarify the molecular mechanism. Our results showed that a new polysaccharide utilization locus (PUL) from BO was involved in the cellobiose capturing and degradation. Further, two new cellulases BACOVA_02626GH5 and BACOVA_02630GH5 on the cell surface performed the degradation of cellobiose into glucose were determined. The predicted structures of BACOVA_02626GH5 and BACOVA_02630GH5 were highly homologous with the cellulase from soil bacteria, and the catalytic residues were highly conservative with two glutamate residues. In murine experiment, we observed cellobiose reshaped the composition of gut microbiota and probably modified the metabolic function of bacteria. Taken together, our findings further highlight the evidence of cellulose can be degraded by human gut microbes and provide new insight in the field of investigation on cellulose.
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Affiliation(s)
- Meixia Li
- Glycochemistry and Glycobiology Lab, Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China
| | - Yeqing Wang
- Glycochemistry and Glycobiology Lab, Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China
| | - Ciliang Guo
- Glycochemistry and Glycobiology Lab, Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China
- University of Chinese Academy of Science, Beijing, P. R. China
| | | | | | - Yifan Bu
- Zelixir Biotech, Shanghai, P. R. China
| | - Kan Ding
- Glycochemistry and Glycobiology Lab, Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, P. R. China
- University of Chinese Academy of Science, Beijing, P. R. China
- Zhongshan Institute for Drug Discovery, Shanghai Institute of Materia Medica, Chinese Academy of Science, SSIP Healthcare and Medicine Demonstration Zone, Zhongshan, P. R. China
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24
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Whole-Genome Sequencing and Annotation of Fibrobacter succinogenes HC4, Isolated from the Horse Cecum. Microbiol Resour Announc 2022; 11:e0044022. [PMID: 36227092 PMCID: PMC9670992 DOI: 10.1128/mra.00440-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Fibrobacter succinogenes is a major cellulolytic bacterial species living in the large intestines of herbivores. This study reports the genome sequencing, assembly, and annotation of F. succinogenes HC4 (DSM 33656), a strain isolated from horse cecal contents. The genome comprised a total of 3.74 Mbp, with a G+C content of 48.96%.
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