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Articles de revues sur le sujet « Methanobrevibacter »

Auteur : Grafiati
Publié le 4 juin 2021
Mis à jour le 16 février 2022

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1

Miller, T. L. « Description of Methanobrevibacter gottschalkii sp. nov., Methanobrevibacter thaueri sp. nov., Methanobrevibacter woesei sp. nov. and Methanobrevibacter wolinii sp. nov ». INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 52, no 3 (1 mai 2002) : 819–22. http://dx.doi.org/10.1099/ijs.0.02022-0.

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Miller, Terry L., et Chuzhao Lin. « Description of Methanobrevibacter gottschalkii sp. nov., Methanobrevibacter thaueri sp. nov., Methanobrevibacter woesei sp. nov. and Methanobrevibacter wolinii sp. nov.. » International Journal of Systematic and Evolutionary Microbiology 52, no 3 (1 mai 2002) : 819–22. http://dx.doi.org/10.1099/00207713-52-3-819.

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Rea, Suzanne, John P. Bowman, Sam Popovski, Carolyn Pimm et André-Denis G. Wright. « Methanobrevibacter millerae sp. nov. and Methanobrevibacter olleyae sp. nov., methanogens from the ovine and bovine rumen that can utilize formate for growth ». International Journal of Systematic and Evolutionary Microbiology 57, no 3 (1 mars 2007) : 450–56. http://dx.doi.org/10.1099/ijs.0.63984-0.

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Four formate-utilizing methanogens were isolated from ovine (strain KM1H5-1PT) and bovine (strains AK-87, OCP and ZA-10T) rumen contents. Based on 16S rRNA gene sequence analysis, the methanogen strains were found to belong to the order Methanobacteriales in the genus Methanobrevibacter. Strains ZA-10T and KM1H5-1PT gained energy for growth by the reduction of CO2 to CH4 using H2 or formate exclusively as electron donors. Increasing formate concentrations to 220 mM in batch cultures increased the growth of strain KM1H5-1PT but did not affect the growth of strain ZA-10T. Substrate specificity and resistance to cell-wall lysis supported the affiliation of the strains to the genus Methanobrevibacter. Strains ZA-10T and KM1H5-1PT showed 16S rRNA gene sequence similarity of 98.0 and 98.6 % to their closest recognized relatives, Methanobrevibacter thaueri CWT and Methanobrevibacter ruminantium M1T, respectively. DNA–DNA hybridization experiments indicated that the strains were not affiliated at the species level to their closest recognized relatives, with DNA reassociation values of only 28 % between strains ZA-10T and Methanobrevibacter thaueri CWT and <25 % between strains KM1H5-1PT and Methanobrevibacter ruminantium M1T. Based on the data presented, the new strains are considered to represent two novel species of the genus Methanobrevibacter, for which the names Methanobrevibacter millerae sp. nov. (type strain ZA-10T=DSM 16643T=OCM 820T) and Methanobrevibacter olleyae sp. nov. (type strain KM1H5-1PT=DSM 16632T=OCM 841T) are proposed.
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Zhou, Mi, Emma Hernandez-Sanabria et Le Luo Guan. « Characterization of Variation in Rumen Methanogenic Communities under Different Dietary and Host Feed Efficiency Conditions, as Determined by PCR-Denaturing Gradient Gel Electrophoresis Analysis ». Applied and Environmental Microbiology 76, no 12 (23 avril 2010) : 3776–86. http://dx.doi.org/10.1128/aem.00010-10.

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ABSTRACT Understanding ruminal methanogens is essential for greenhouse gas mitigation, as well as for improving animal performance in the livestock industry. It has been speculated that ruminal methanogenic diversity affects host feed efficiency and results in differences in methane production. This study examined methanogenic profiles in the rumen using culture-independent PCR-denaturing gradient gel electrophoresis (PCR-DGGE) analysis for 56 beef cattle which differed in feed efficiency, as well as diet (the cattle were fed a low-energy diet or a high-energy diet). The methanogenic PCR-DGGE profiles detected were greatly affected by diet, and the major pattern changed from a community containing predominantly Methanobrevibacter ruminantium NT7 with the low-energy diet to a community containing predominantly Methanobrevibacter smithii, Methanobrevibacter sp. AbM4, and/or M. ruminantium NT7 with the high-energy diet. For each diet, the methanogenic PCR-DGGE pattern was strongly associated with the feed efficiency of the host. Diet-associated bands for Methanobrevibacter sp. AbM4 and M. smithii SM9 and a feed efficiency-related band for M. smithii PS were identified. The abundance of total methanogens was estimated by determining the numbers of copies of the 16S rRNA genes of methanogens. However, the size of the methanogen population did not correlate with differences in feed efficiency, diet, or metabolic measurements. Thus, the structure of the methanogenic community at the species or strain level may be more important for determining host feed efficiency under different dietary conditions.
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Shima, Seigo, Melanie Sordel-Klippert, Andrei Brioukhanov, Alexander Netrusov, Dietmar Linder et Rudolf K. Thauer. « Characterization of a Heme-Dependent Catalase fromMethanobrevibacter arboriphilus ». Applied and Environmental Microbiology 67, no 7 (1 juillet 2001) : 3041–45. http://dx.doi.org/10.1128/aem.67.7.3041-3045.2001.

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ABSTRACT Recently it was reported that methanogens of the genusMethanobrevibacter exhibit catalase activity. This was surprising, since Methanobrevibacter species belong to the order Methanobacteriales, which are known not to contain cytochromes and to lack the ability to synthesize heme. We report here that Methanobrevibacter arboriphilus strains AZ and DH1 contained catalase activity only when the growth medium was supplemented with hemin. The heme catalase was purified and characterized, and the encoding gene was cloned. The amino acid sequence of the catalase from the methanogens is most similar to that of Methanosarcina barkeri.
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McGOWAN, S. C., N. L. BLUMSOM et E. M. HOEY. « Cloning of Methanobrevibacter smithti PS genomic DNA ». Biochemical Society Transactions 15, no 2 (1 avril 1987) : 294. http://dx.doi.org/10.1042/bst0150294.

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Savant, D. V., et D. R. Ranade. « Application of Methanobrevibacter acididurans in anaerobic digestion ». Water Science and Technology 50, no 6 (1 septembre 2004) : 109–14. http://dx.doi.org/10.2166/wst.2004.0366.

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To operate anaerobic digesters successfully under acidic conditions, hydrogen utilizing methanogens which can grow efficiently at low pH and tolerate high volatile fatty acids (VFA) are desirable. An acid tolerant hydrogenotrophic methanogen viz. Methanobrevibacter acididurans isolated from slurry of an anaerobic digester running on alcohol distillery wastewater has been described earlier by this lab. This organism could grow optimally at pH 6.0. In the experiments reported herein, M. acididurans showed better methanogenesis under acidic conditions with high VFA, particularly acetate, than Methanobacterium bryantii, a common hydrogenotrophic inhabitant of anaerobic digesters. Addition of M. acididurans culture to digesting slurry of acidogenic as well as methanogenic digesters running on distillery wastewater showed increase in methane production and decrease in accumulation of volatile fatty acids. The results proved the feasibility of application of M. acididurans in anaerobic digesters.
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Conway de Macario, E., A. J. L. Macario et A. Pastini. « The superficial antigenic mosaic of Methanobrevibacter smithii ». Archives of Microbiology 142, no 4 (septembre 1985) : 311–16. http://dx.doi.org/10.1007/bf00491896.

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Huynh, H. T. T., V. D. Nkamga, M. Drancourt et G. Aboudharam. « Genetic variants of dental plaque Methanobrevibacter oralis ». European Journal of Clinical Microbiology & ; Infectious Diseases 34, no 6 (30 janvier 2015) : 1097–101. http://dx.doi.org/10.1007/s10096-015-2325-x.

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Djemai, K., F. Gouriet, J. Michel, T. Radulesco, M. Drancourt et G. Grine. « Methanobrevibacter smithii tonsillar phlegmon : a case report ». New Microbes and New Infections 42 (juillet 2021) : 100891. http://dx.doi.org/10.1016/j.nmni.2021.100891.

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Leahy, S. C., W. J. Kelly, D. Li, Y. Li, E. Altermann, S. C. Lambie, F. Cox et G. T. Attwood. « The Complete Genome Sequence of Methanobrevibacter sp. AbM4 ». Standards in Genomic Sciences 8, no 2 (25 mai 2013) : 215–27. http://dx.doi.org/10.4056/sigs.3977691.

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Lee, Jong-Hwan, Sanjay Kumar, Geun-Hye Lee, Dong-Ho Chang, Moon-Soo Rhee, Min-Ho Yoon et Byoung-Chan Kim. « Methanobrevibacter boviskoreani sp. nov., isolated from the rumen of Korean native cattle ». International Journal of Systematic and Evolutionary Microbiology 63, Pt_11 (1 novembre 2013) : 4196–201. http://dx.doi.org/10.1099/ijs.0.054056-0.

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Three strictly anaerobic, methanogenic strains JH1T, JH4 and JH8 were isolated from rumen of the Korean native cattle (HanWoo; Bos taurus coreanae) in South Korea. The colonies were circular, opaque, and slightly yellowish. Phylogenetic analyses of 16S rRNA gene and mcrA (encoding α subunit of methyl-coenzyme M reductase) sequences confirmed the affiliation of the novel strains with the Methanobacteriales , and Methanobrevibacter wolinii SHT was the most closely related species. The 16S rRNA gene and mcrA sequence similarities between strains JH1T, JH4 and JH8 and M. wolinii SHT were 96.2 and 89.0 % respectively, and DNA–DNA hybridization of the isolates and M. wolinii DSM 11976T showed a 20 % reassociation. Strain JH1T exhibited 92 % DNA–DNA relatedness with strains JH4 and JH8, and their 16S rRNA gene and mcrA sequences were identical. Cells stained Gram-positive and were non-motile rods, 1.5–1.8 µm long and 0.6 µm wide. The strains were able to use H2/CO2 and formate. The optimum temperature and pH ranges for growth were 37–40 °C and pH 6.5–7.0. The DNA G+C content of strain JH1T was 28 mol%. Based on data from this study using a polyphasic approach, the three strains represent a novel species of genus Methanobrevibacter , for which the name Methanobrevibacter boviskoreani sp. nov. is proposed. The type strain is JH1T ( = KCTC 4102T = JCM 18376T).
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Leadbetter, J. R., et J. A. Breznak. « Physiological ecology of Methanobrevibacter cuticularis sp. nov. and Methanobrevibacter curvatus sp. nov., isolated from the hindgut of the termite Reticulitermes flavipes. » Applied and environmental microbiology 62, no 10 (1996) : 3620–31. http://dx.doi.org/10.1128/aem.62.10.3620-3631.1996.

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Nakamura, Kohei, Takeshi Terada, Yuji Sekiguchi, Naoya Shinzato, Xian-Ying Meng, Miho Enoki et Yoichi Kamagata. « Application of Pseudomurein Endoisopeptidase to Fluorescence In Situ Hybridization of Methanogens within the Family Methanobacteriaceae ». Applied and Environmental Microbiology 72, no 11 (1 septembre 2006) : 6907–13. http://dx.doi.org/10.1128/aem.01499-06.

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ABSTRACT In situ detection of methanogens within the family Methanobacteriaceae is sometimes known to be unsuccessful due to the difficulty in permeability of oligonucleotide probes. Pseudomurein endoisopeptidase (Pei), a lytic enzyme that specifically acts on their cell walls, was applied prior to 16S rRNA-targeting fluorescence in situ hybridization (FISH). For this purpose, pure cultured methanogens within this family, Methanobacterium bryantii, Methanobrevibacter ruminantium, Methanosphaera stadtmanae, and Methanothermobacter thermautotrophicus together with a Methanothermobacter thermautotrophicus-containing syntrophic acetate-oxidizing coculture, endosymbiotic Methanobrevibacter methanogens within an anaerobic ciliate, and an upflow anaerobic sludge blanket (UASB) granule were examined. Even without the Pei treatment, Methanobacterium bryantii and Methanothermobacter thermautotrophicus cells are relatively well hybridized with oligonucleotide probes. However, almost none of the cells of Methanobrevibacter ruminantium, Methanosphaera stadtmanae, cocultured Methanothermobacter thermautotrophicus, and the endosymbiotic methanogens and the cells within UASB granule were hybridized. Pei treatment was able to increase the probe hybridization ratio in every specimen, particularly in the specimen that had shown little hybridization. Interestingly, the hybridizing signal intensity of Methanothermobacter thermautotrophicus cells in coculture with an acetate-oxidizing H2-producing syntroph was significantly improved by Pei pretreatment, whereas the probe was well hybridized with the cells of pure culture of the same strain. We found that the difference is attributed to the differences in cell wall thicknesses between the two culture conditions. These results indicate that Pei treatment is effective for FISH analysis of methanogens that show impermeability to the probe.
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Carbone, Vincenzo, Linley R. Schofield, Amy K. Beattie, Andrew J. Sutherland-Smith et Ron S. Ronimus. « The crystal structure of methenyltetrahydromethanopterin cyclohydrolase from Methanobrevibacter ruminantium ». Proteins : Structure, Function, and Bioinformatics 81, no 11 (23 août 2013) : 2064–70. http://dx.doi.org/10.1002/prot.24372.

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Grine, G., M. A. Boualam et M. Drancourt. « Methanobrevibacter smithii, a methanogen consistently colonising the newborn stomach ». European Journal of Clinical Microbiology & ; Infectious Diseases 36, no 12 (19 août 2017) : 2449–55. http://dx.doi.org/10.1007/s10096-017-3084-7.

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Hassani, Yasmine, Fabienne Brégeon, Gérard Aboudharam, Michel Drancourt et Ghiles Grine. « Detection of Methanobrevobacter smithii and Methanobrevibacter oralis in Lower Respiratory Tract Microbiota ». Microorganisms 8, no 12 (26 novembre 2020) : 1866. http://dx.doi.org/10.3390/microorganisms8121866.

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Methanogens, the sole microbes producing methane, are archaea commonly found in human anaerobic microbiota. Methanogens are emerging as opportunistic pathogens associated with dysbiosis and are also detected and cultured in anaerobic abscesses. Their presence in the respiratory tract is yet unknown. As a preliminary answer, prospective investigation of 908 respiratory tract samples using polyphasic approach combining PCR-sequencing, real-time PCR, fluorescent in situ hybridization (FISH), and methanogens culture was carried out. Methanobrevibacter smithii and Methanobrevibacter oralis DNA sequences, were detected in 21/527 (3.9%) sputum samples, 2/188 (1.06%) bronchoalveolar lavages, and none of 193 tracheo-bronchial aspirations. Further, fluorescence in situ hybridization detected methanogens in three sputum investigated specimens with stick morphology suggesting M. oralis and in another one bronchoalveolar lavage sample investigated, diplococal morphology suggesting M. smithii. These observations extend the known territory of methanogens to the respiratory tract and lay the foundations for further interpretation of their detection as pathogens in any future cases of isolation from bronchoalveolar lavages and the lungs.
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Tokura, Mitsunori, Kiyoshi Tajima et Kazunari Ushida. « Isolation of Methanobrevibacter sp. as a ciliate-associated ruminal methanogen. » Journal of General and Applied Microbiology 45, no 1 (1999) : 43–47. http://dx.doi.org/10.2323/jgam.45.43.

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McGovern, E., D. Kenny, A. Kelly et S. Waters. « 75 Late-Breaking : Investigation into the relationship Methanobrevibacter millerae YE315 ». Journal of Animal Science 96, suppl_3 (décembre 2018) : 399. http://dx.doi.org/10.1093/jas/sky404.875.

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Grine, Ghiles, Romain Lotte, David Chirio, Alicia Chevalier, Didier Raoult, Michel Drancourt et Raymond Ruimy. « Co-culture of Methanobrevibacter smithii with enterobacteria during urinary infection ». EBioMedicine 43 (mai 2019) : 333–37. http://dx.doi.org/10.1016/j.ebiom.2019.04.037.

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Wright, André-Denis G., Xuanli Ma et Nestor E. Obispo. « Methanobrevibacter Phylotypes are the Dominant Methanogens in Sheep from Venezuela ». Microbial Ecology 56, no 2 (29 décembre 2007) : 390–94. http://dx.doi.org/10.1007/s00248-007-9351-x.

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Leadbetter, Jared R., Laurel D. Crosby et J. A. Breznak. « Methanobrevibacter filiformis sp. nov., a filamentous methanogen from termite hindguts ». Archives of Microbiology 169, no 4 (9 avril 1998) : 287–92. http://dx.doi.org/10.1007/s002030050574.

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Sereme, Youssouf, Cheick Oumar Guindo, Anne Filleron, Pierre Corbeau, Tu Anh Tran, Michel Drancourt, Joana Vitte et Ghiles Grine. « Meconial Methanobrevibacter smithii suggests intrauterine methanogen colonization in preterm neonates ». Current Research in Microbial Sciences 2 (décembre 2021) : 100034. http://dx.doi.org/10.1016/j.crmicr.2021.100034.

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Shinzato, Naoya, Tadao Matsumoto, Ikuo Yamaoka, Tairo Oshima et Akihiko Yamagishi. « Phylogenetic Diversity of Symbiotic Methanogens Living in the Hindgut of the Lower Termite Reticulitermes speratus Analyzed by PCR and In Situ Hybridization ». Applied and Environmental Microbiology 65, no 2 (1 février 1999) : 837–40. http://dx.doi.org/10.1128/aem.65.2.837-840.1999.

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ABSTRACT A phylogenetic analysis of the sequences of 60 clones of archaeal small-subunit rRNA genes amplified from the termiteReticulitermes speratus revealed that most of them (56 clones) clustered in the genus Methanobrevibacter. Three clones were classified in the order Thermoplasmales. TheMethanobrevibacter-related symbionts were detected by in situ hybridization analysis.
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Freetly, Harvey C., Amanda K. Lindholm-Perry, Andrew P. Foote, Sarah Bennett et Jim E. Wells. « 192 Abundance of rumen methanogens did not differ in cattle that differed in residual feed intake ». Journal of Animal Science 98, Supplement_4 (3 novembre 2020) : 150. http://dx.doi.org/10.1093/jas/skaa278.274.

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Abstract Methane represents an energetic loss, and it has been proposed that its reduction may be associated with improved feed efficiency. Rumen methanogens produce most of the methane. Forty-nine crossbred heifers were individually fed a ration that consisted of 67.75% rolled corn, 20% wet distillers grain with solubles, 8% chopped alfalfa and 4.25% mineral/vitamin/rumensin mix for 84 d. Residual feed intake was the residual of the observed – predicted FI for the multivariate regression of FI on ADG and mid-metabolic BW for the population. Six heifers with the greatest RFI (1.75 ± 0.31 kg DM/d) and 6 with least RFI (-1.48 ± 0.31 kg DM/d) were selected. Rumen fluid was sampled from a tube passed through the mouth into the rumen. Rumen fluid was flash frozen in liquid N2 and stored at -80°C. After the first collection, heifers with greater RFI were pair fed to the less RFI heifers and rumen fluid was sampled 5 wk later. DNA was isolated from the rumen fluid and primer sets targeting total methanogens, Methanomicrobiales, Methanobacteriales, Methanosarcina, Methanobacterium, Methanobrevibacter ruminantium + Mbb. Cuticularis, and Methanobrevibacter smithii + Mbb. wolinii + Mbb. thaueri + Mbb. gottschalkii + Mbb. Woesei were amplified with real-time quantitative PCR (qPCR). Standard curves were generated to quantify copy number. There were no differences in copy number for the interaction of RFI classifications and sample period for all primer sets (P &gt; 0.18). There were no differences in (P &gt; 0.15) in RFI classification for all qPCR primer sets. There were fewer copies for the Methanobrevibacter ruminantium + Mbb. Cuticularis qPCR for samples collected in the first week compared to the 5 wk sample (P = 0.03); however, there were no difference for collection week for the other qPCR assays (P &gt; 0.16). USDA is an equal opportunity provider and employer.
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Vlasova, A. V., V. A. Isakov, V. I. Pilipenko, S. A. Sheveleva, Yu M. Markova, A. S. Polyanina et I. V. Maev. « Methanobrevibacter smithii in irritable bowel syndrome : a clinical and molecular study ». Terapevticheskii arkhiv 91, no 8 (15 août 2019) : 47–51. http://dx.doi.org/10.26442/00403660.2019.08.000383.

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Aim. To assess the role of Methanobrevibacter smithii in patients with irritable bowel syndrome associated with small intestinal bowel overgrowth. Materials and methods. Sixty - seven patients with IBS according to Rome IV were enrolled into the study in whom hydrogen breath test was performed. Thirty - two healthy subjects with negative breath test was used as a control. All IBS symptoms assessed daily with 5 grade Lykert scale for 7 days, stool was assessed by Brystol stool scale. M. smithii was confirmed in stool samples by PCR. Results and discussion. In 67 IBS patients CH4 overproduction was found in 32 (47.7%), H2 overproduction in 31 (46.2%) and normal values in 4 (5.9%) by hydrogen breath test. M. smithii was confirmed by stool PCR in all patients with CH4 overproduction. Severity and prevalence of main clinical features of IBS were similar in both SIBO groups but were significantly higher than in control (p
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Prakash, Shobha, Mallanagouda B. Patil et Anurag Bhatnagar. « Prevalence of Methanobrevibacter oralis in Chronic Periodontitis Patients : A Pilot Study ». CODS Journal of Dentistry 11, no 2 (2019) : 32–35. http://dx.doi.org/10.5005/jp-journals-10063-0051.

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Joblin, K. N., G. E. Naylor et A. G. Williams. « Effect of Methanobrevibacter smithii on Xylanolytic Activity of Anaerobic Ruminal Fungi ». Applied and Environmental Microbiology 56, no 8 (1990) : 2287–95. http://dx.doi.org/10.1128/aem.56.8.2287-2295.1990.

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Bringuier, Amélie, Saber Khelaifia, Hervé Richet, Gérard Aboudharam et Michel Drancourt. « Real-Time PCR Quantification of Methanobrevibacter oralis in Periodontitis : Table 1 ». Journal of Clinical Microbiology 51, no 3 (19 décembre 2012) : 993–94. http://dx.doi.org/10.1128/jcm.02863-12.

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BLUMSOM, NIGEL L., ADRIENNE HEALY et FIONA HOGAN. « The induction of an arginine-metabolizing enzyme in Methanobrevibacter smithii PS ». Biochemical Society Transactions 14, no 2 (1 avril 1986) : 453–54. http://dx.doi.org/10.1042/bst0140453.

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Samuel, B. S., E. E. Hansen, J. K. Manchester, P. M. Coutinho, B. Henrissat, R. Fulton, P. Latreille, K. Kim, R. K. Wilson et J. I. Gordon. « Genomic and metabolic adaptations of Methanobrevibacter smithii to the human gut ». Proceedings of the National Academy of Sciences 104, no 25 (11 juin 2007) : 10643–48. http://dx.doi.org/10.1073/pnas.0704189104.

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Mbakwa, Catherine A., John Penders, Paul H. Savelkoul, Carel Thijs, Pieter C. Dagnelie, Monique Mommers et Ilja C. W. Arts. « Gut colonization with methanobrevibacter smithii is associated with childhood weight development ». Obesity 23, no 12 (2 novembre 2015) : 2508–16. http://dx.doi.org/10.1002/oby.21266.

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Zhang, Xu, Tian, Zheng, Hao et Huang. « Impact of Fe and Ni Addition on the VFAs’ Generation and Process Stability of Anaerobic Fermentation Containing Cd ». International Journal of Environmental Research and Public Health 16, no 21 (23 octobre 2019) : 4066. http://dx.doi.org/10.3390/ijerph16214066.

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The effects of Cd, Cd + Fe, and Cd + Ni on the thermophilic anaerobic fermentation of corn stover and cow manure were studied in pilot experiments by investigating the biogas properties, process stability, substrate biodegradation, and microbial properties. The results showed that the addition of Fe and Ni into the Cd-containing fermentation system induced higher cumulative biogas yields and NH4+–N concentrations compared with the only Cd-added group. Ni together with Cd improved and brought forward the peak daily biogas yields, and increased the CH4 contents to 80.76%. Taking the whole fermentation process into consideration, the promoting impact of the Cd + Ni group was mainly attributed to better process stability, a higher average NH4+–N concentration, and increased utilization of acetate. Adding Fe into the Cd-containing fermentation system increased the absolute abundance of Methanobrevibacter on the 13th day, and Methanobrevibacter and Methanobacterium were found to be positively correlated with the daily biogas yield. This research was expected to provide a basis for the reuse of biological wastes contaminated by heavy metals and a reference for further studies on the influence of compound heavy metals on anaerobic fermentation.
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Saengkerdsub, Suwat, Robin C. Anderson, Heather H. Wilkinson, Woo-Kyun Kim, David J. Nisbet et Steven C. Ricke. « Identification and Quantification of Methanogenic Archaea in Adult Chicken Ceca ». Applied and Environmental Microbiology 73, no 1 (3 novembre 2006) : 353–56. http://dx.doi.org/10.1128/aem.01931-06.

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ABSTRACT By using molecular methods for the identification and quantification of methanogenic archaea in adult chicken ceca, 16S rRNA genes of 11 different phylotypes, 10 of which were 99% similar to Methanobrevibacter woesei, were found. Methanogen populations, as assessed by cultivation, and the 16S rRNA copy number were between 6.38 and 8.23 cells/g (wet weight) and 5.50 and 7.19 log10/g (wet weight), respectively.
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D’Onofrio, Valentina, Federica Del Chierico, Paola Belci, Pamela Vernocchi, Andrea Quagliariello, Sofia Reddel, Giorgia Conta et al. « Effects of a Synbiotic Formula on Functional Bowel Disorders and Gut Microbiota Profile during Long-Term Home Enteral Nutrition (LTHEN) : A Pilot Study ». Nutrients 13, no 1 (29 décembre 2020) : 87. http://dx.doi.org/10.3390/nu13010087.

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Long-term enteral nutrition (LTEN) can induce gut microbiota (GM) dysbiosis and gastrointestinal related symptoms, such as constipation or diarrhoea. To date, the treatment of constipation is based on the use of laxatives and prebiotics. Only recently have probiotics and synbiotics been considered, the latter modulating the GM and regulating intestinal functions. This randomized open-label intervention study evaluated the effects of synbiotic treatment on the GM profile, its functional activity and on intestinal functions in long-term home EN (LTHEN) patients. Twenty LTHEN patients were recruited to take enteral formula plus one sachet/day of synbiotic (intervention group, IG) or enteral formula (control group, CG) for four months and evaluated for constipation, stool consistency, and GM and metabolite profiles. In IG patients, statistically significant reduction of constipation and increase of stool consistency were observed after four months (T1), compared to CG subjects. GM ecology analyses revealed a decrease in the microbial diversity of both IC and CG groups. Biodiversity increased at T1 for 5/11 IG patients and Methanobrevibacter was identified as the biomarker correlated to the richness increase. Moreover, the increase of short chain fatty acids and the reduction of harmful molecules have been correlated to synbiotic administration. Synbiotics improve constipation symptoms and influences Methanobrevibacter growth in LTHEN patients.
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May, Harold D., Qingzhong Wu et Cheryl K. Blake. « Effects of theFusariumspp. mycotoxins fusaric acid and deoxynivalenol on the growth ofRuminococcus albusandMethanobrevibacter ruminantium ». Canadian Journal of Microbiology 46, no 8 (1 août 2000) : 692–99. http://dx.doi.org/10.1139/w00-045.

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The Fusarium spp. mycotoxins fusaric acid and deoxynivalenol (DON) were tested for antimicrobial activity against Ruminococcus albus and Methanobrevibacter ruminantium. The growth of both organisms was inhibited by fusaric acid as low as 15 µg/mL (84 µM) but not by DON, at levels as high as 100 µg/mL (338 µM). No synergistic inhibitory effect was observed with DON plus fusaric acid. Neither organism was able to adapt to the fusaric acid and responses of each organism to the compound were different. The optical density (OD) maximum for R. albus, but not for M. ruminantium, was diminished after 28 days incubation at concentrations of fusaric acid below 240 µg/mL. Inhibition of R. albus started before significant growth had occurred, while M. ruminantium doubled twice before the onset of inhibition. Responses to picolinic acid, an analog of fusaric acid, were also dramatically different between the two microorganisms with M. ruminantium exhibiting a severe lag followed by a complete recovery of growth, while R. albus was only slightly inhibited with no lag. These results suggest that the mechanism of fusaric acid inhibition is specific to each microorganism. This is the first demonstration of the common mycotoxin fusaric acid inhibiting the growth of rumen bacteria.Key words: mycotoxins, fusaric acid, deoxynivalenol, Ruminococcus albus, Methanobrevibacter ruminantium.
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Sharma, Ashwani, Prem Prashant Chaudhary, Sunil Kumar Sirohi et Jyoti Saxena. « Structure modeling and inhibitor prediction of NADP oxidoreductase enzyme from Methanobrevibacter smithii ». Bioinformation 6, no 1 (2 mars 2011) : 15–19. http://dx.doi.org/10.6026/97320630006015.

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Morii, H., M. Nishihara, M. Ohga et Y. Koga. « A diphytanyl ether analog of phosphatidylserine from a methanogenic bacterium, Methanobrevibacter arboriphilus. » Journal of Lipid Research 27, no 7 (septembre 1988) : 724–30. http://dx.doi.org/10.1016/s0022-2275(20)38797-6.

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Rooks, Emily, Gene Kim, Stacy Weitsman, Ruchi Mathur, Christopher Chang et Mark Pimentel. « Su1940 Methanobrevibacter Smithii is Highly Prominent in the Small Bowel of Rats ». Gastroenterology 142, no 5 (mai 2012) : S—541. http://dx.doi.org/10.1016/s0016-5085(12)62079-4.

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Savant, D. V. « Methanobrevibacter acididurans sp. nov., a novel methanogen from a sour anaerobic digester ». INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY 52, no 4 (1 juillet 2002) : 1081–87. http://dx.doi.org/10.1099/ijs.0.01903-0.

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Tholen, Anne, Michael Pester et Andreas Brune. « Simultaneous methanogenesis and oxygen reduction by Methanobrevibacter cuticularis at low oxygen fluxes ». FEMS Microbiology Ecology 62, no 3 (décembre 2007) : 303–12. http://dx.doi.org/10.1111/j.1574-6941.2007.00390.x.

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Morales, Walter, Emily Marsh, Allen Yu, Zachary Marsh, Stacy Weitsman, Gillian M. Barlow, Ali Rezaie, Christopher Chang, Vince Wacher et Mark Pimentel. « Mo2051 Lovastatin Improves Stool Form in Methanobrevibacter Smithii Colonized Rats With Constipation ». Gastroenterology 148, no 4 (avril 2015) : S—779—S—780. http://dx.doi.org/10.1016/s0016-5085(15)32660-3.

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Bang, Corinna, Katrin Weidenbach, Thomas Gutsmann, Holger Heine et Ruth A. Schmitz. « The Intestinal Archaea Methanosphaera stadtmanae and Methanobrevibacter smithii Activate Human Dendritic Cells ». PLoS ONE 9, no 6 (10 juin 2014) : e99411. http://dx.doi.org/10.1371/journal.pone.0099411.

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Miller, T. L., E. Currenti et M. J. Wolin. « Anaerobic bioconversion of cellulose by Ruminococcus albus , Methanobrevibacter smithii , and Methanosarcina barkeri ». Applied Microbiology and Biotechnology 54, no 4 (13 octobre 2000) : 494–98. http://dx.doi.org/10.1007/s002530000430.

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Kaushik, Vineeta, Saumya Prasad et Manisha Goel. « Biophysical and biochemical characterization of a thermostable archaeal cyclophilin from Methanobrevibacter ruminantium ». International Journal of Biological Macromolecules 139 (octobre 2019) : 139–52. http://dx.doi.org/10.1016/j.ijbiomac.2019.07.149.

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Nkamga, Vanessa D., Hong T. T. Huynh, Gérard Aboudharam, Raymond Ruimy et Michel Drancourt. « Diversity of Human-Associated Methanobrevibacter smithii Isolates Revealed by Multispacer Sequence Typing ». Current Microbiology 70, no 6 (24 février 2015) : 810–15. http://dx.doi.org/10.1007/s00284-015-0787-9.

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Lin, Chuzhao, et T. L. Miller. « Phylogenetic analysis of Methanobrevibacter isolated from feces of humans and other animals ». Archives of Microbiology 169, no 5 (29 avril 1998) : 397–403. http://dx.doi.org/10.1007/s002030050589.

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Savant, D. V., Y. S. Shouche, S. Prakash et D. R. Ranade. « Methanobrevibacter acididurans sp. nov., a novel methanogen from a sour anaerobic digester. » International Journal of Systematic and Evolutionary Microbiology 52, no 4 (1 juillet 2002) : 1081–87. http://dx.doi.org/10.1099/00207713-52-4-1081.

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Nkamga, V. D., R. Lotte, P. M. Roger, M. Drancourt et R. Ruimy. « Methanobrevibacter smithii and Bacteroides thetaiotaomicron cultivated from a chronic paravertebral muscle abscess ». Clinical Microbiology and Infection 22, no 12 (décembre 2016) : 1008–9. http://dx.doi.org/10.1016/j.cmi.2016.09.007.

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Mahmood, Mubarik, Ratchaneewan Khiaosa-ard, Qendrim Zebeli et Renée M. Petri. « Betaine Modulates Rumen Archaeal Community and Functioning during Heat and Osmotic Stress Conditions In Vitro ». Archaea 2020 (22 octobre 2020) : 1–17. http://dx.doi.org/10.1155/2020/8875773.

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Rumen archaea play an important role in scavenging ruminal hydrogen (H2) and thus facilitate rumen fermentation. They require optimum temperature and osmolality for their growth and metabolism; however, a number of external factors may put archaea under heat and osmotic stress. Betaine is an osmolyte, molecular chaperone, and antioxidant; therefore, it bears potential to combat against these stressors. In this in vitro study, three betaine levels, namely, 0 (control), 51 (low), and 286 (high) ppm, were used. Each of these was subjected to two temperatures (39.5 and 42°C) and two osmolality conditions (295 and 420 mOsmol kg-1) with n = 6 per treatment. Sequencing analyses of the solid phase (which use solid materials containing primarily fibrous materials of low-density feed particles) and the liquid phase (rumen fermenter liquid) using 16S rRNA revealed that more than 99.8% of the ruminal archaea in fermenters belong to the phylum Euryarchaeota. At the genus level, Methanobrevibacter was the most prevalent in both phases, and Methanosaeta was only detected in the liquid phase. The genera Methanobrevibacter and Methanobacterium both showed a positive correlation with methane (CH4) formation in the liquid and solid phases, respectively ( P < 0.05 ). Heat stress increased the relative abundance of genus Methanimicrococcus at the expense of candidate archaeal genus Vadin CA11 ( P < 0.05 ). In the solid phase, osmotic stress significantly reduced the Shannon and Simpson indices of diversity, and relative abundance was higher for Methanobrevibacter at the expense of Methanimicrococcus. In the liquid phase, osmotic stress increased not only the abundance-based coverage estimator (ACE) and singles parameters of diversity but also the relative abundances of Methanosphaera and Methanobacterium. The overall decrease in all gas parameters and estimated metabolic hydrogen ([2H]) utilization was observed during osmotic stress conditions ( P < 0.05 ). Betaine enhanced the diversity of solid phase archaea as indicated by the increase in ACE and singles during heat stress, and only a high dose improved all diversity parameters in the liquid phase during osmotic stress ( P < 0.05 ). Thus, betaine alleviates the effects of heat stress and osmotic stress on the archaea community.
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