Article
Geography, Physical
Chaochao Xing, Xianguo Lang, Haoran Ma, Yang Peng, Yongbo Peng, Yarong Liu, Ruimin Wang, Meng Ning, Yixin Cui, Xin Yu, Bing Shen
Summary: Microbial sulfate reduction (MSR) and microbial iron reduction (MIR) are two major anaerobic metabolic pathways that account for the majority of anaerobic organic matter degradation in modern marine sediments. The early Cambrian ocean might be characterized by extensive MSR in seawater and MIR in sediment porewater, differing from the predominantly MSR in sediment observed in modern sulfidic oceans like the Black Sea.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Biodiversity Conservation
Sizhong Yang, Sara E. Anthony, Maren Jenrich, Michiel H. in 't Zandt, Jens Strauss, Pier Paul Overduin, Guido Grosse, Michael Angelopoulos, Boris K. Biskaborn, Mikhail N. Grigoriev, Dirk Wagner, Christian Knoblauch, Andrea Jaeschke, Janet Rethemeyer, Jens Kallmeyer, Susanne Liebner
Summary: Thermokarst lagoons play an important role in the production and release of greenhouse gases. The infiltration of sulfate-rich marine water into thermokarst lagoons alters the geochemical characteristics and microbial methane-cycling community. Methane oxidation is higher in thermokarst lagoons, while methane-producing microorganisms are similar to lakes.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Environmental Sciences
Mingyue Li, Anqi Fang, Xiaoli Yu, Keke Zhang, Zhili He, Cheng Wang, Yisheng Peng, Fanshu Xiao, Tony Yang, Wei Zhang, Xiafei Zheng, Qiuping Zhong, Xingyu Liu, Qingyun Yan
Summary: Microbially-driven sulfur cycling is a critical biogeochemical process in sulfur-rich mangrove ecosystems. This study reveals the diversity, composition, and structure of sulfur-oxidizing bacteria (SOB) and sulfate-reducing bacteria (SRB) in mangrove sediments, highlighting the important role of temperature, redox potential, and key factors like elemental sulfur and total carbon in influencing these microbial communities. Additionally, the morphological transformation of sulfur compounds explains the variations in sulfur cycling microbial communities, with specific dominant genus identified in different mangrove species. These findings shed light on the sulfur cycling dynamics in mangrove ecosystems and offer insights for similar wetland ecosystems from a microbial perspective.
Article
Environmental Sciences
Ziran Yang, Hisaaki Hosokawa, Masashi Kuroda, Daisuke Inoue, Michihiko Ike
Summary: This study evaluated the potential of microbial communities in river sediments to reduce and remove Sb(V) from the aqueous phase, showing a relatively wide distribution of microbial Sb(V) reduction potential and presence of multiple types of Sb(V) reduction pathways, including direct and indirect reduction by microbial sulfate reduction.
Article
Engineering, Environmental
Huanhuan Geng, Fei Wang, Changchun Yan, Shuai Ma, Yiyue Zhang, Qizheng Qin, Zhijun Tian, Ruiping Liu, Huilun Chen, Beihai Zhou, Rongfang Yuan
Summary: This study investigated the metal(loid) fractions in alkaline iron tailings areas and the enrichment ability of dominant plants. High-throughput sequencing and metagenome analysis were used to examine the rhizosphere microbial community structures and their strategies. The results showed that certain plants have strong enrichment capacity for As and the maximum transport factor for Mn can reach 4.01. The richness and diversity of bacteria were the highest in rhizosphere tailings.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Editorial Material
Microbiology
Kenneth Wasmund
Summary: Sulfate-reducing microorganisms (SRM) play a crucial role in global sulfur and carbon cycles, especially in anoxic marine sediments. They consume fermentation products and hydrogen, affecting microbial communities, particularly members of the Marinilabiliales. This study provides new insights into the ecological networks and community assembly in marine sediment microbes, highlighting the importance of SRM activity in ecosystem functions.
Article
Microbiology
Angela M. Chilton, Suong T. T. Nguyen, Tiffanie M. Nelson, Leanne A. Pearson, Brett A. Neilan
Summary: This study provides the first detailed description of Australia's biocrust microbiome, revealing its distribution and correlation with climate factors. The dominant bacterial phyla are Cyanobacteria, Proteobacteria, Actinobacteria, Chloroflexi, and Bacteroidetes. The composition of microbes differs between northern and southern regions, which is related to seasonal temperatures and summer rainfall.
ENVIRONMENTAL MICROBIOLOGY
(2022)
Article
Geochemistry & Geophysics
Chin Yik Lin, Harold J. Bradbury, Gilad Antler, David J. Burdige, Thomas D. Bennett, Shichun Li, Alexandra V. Turchyn
Summary: Sedimentary microbial communities play a critical role in the global carbon cycle, with the presence of clay minerals stimulating the growth of sulfate-reducing bacteria and influencing the rate of sulfate consumption in marine sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Microbiology
Qi-Yun Liang, Jin-Yu Zhang, Daliang Ning, Wen-Xing Yu, Guan-Jun Chen, Xuanyu Tao, Jizhong Zhou, Zong-Jun Du, Da-Shuai Mu
Summary: Inhibiting sulfate-reducing bacteria (SRB) has shown various effects on microbial community properties and coexistence patterns, indicating the importance of SRB in organic matter (OM) degradation. Suppression of SRB resulted in decreased relative abundances of several bacterial families and altered network and community assembly processes. These findings highlight the essential role of SRB in OM degradation.
Article
Engineering, Marine
Roberto Briones-Gallardo, Muriel Gonzalez-Munoz, Itza Garcia-Bautista, David Valdes-Lozano, Tanit Toledano-Thompson, Erik Polanco-Lugo, Renata Rivera-Madrid, Ruby Valdez-Ojeda
Summary: This study evaluated the capability of microbial consortia isolated from marine sediment to produce hydrogen sulfide in batch reactors. The results showed that the microbial consortia from open-ocean exhibited better substrate utilization and higher hydrogen sulfide production. In addition, the enrichment of sulfate-reducing microbial consortia from moderately eutrophic marine sediments resulted in changes in microbial diversity compared to the original sediment microorganisms.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Adam J. Wyness, Irene Fortune, Andrew J. Blight, Patricia Browne, Morgan Hartley, Matthew Holden, David M. Paterson
Summary: The investigation revealed the evolutionary implications of the ecosystem engineering process in intertidal systems. Results showed that microbial community composition and function were influenced by factors such as bioturbation, bioirrigation, and sediment stabilization, with changes in bacterial communities being primarily driven by biogeochemical gradients.
Article
Environmental Sciences
Carmen Rizzo, Erika Arcadi, Rosario Calogero, Alessandro Ciro Rappazzo, Gabriella Caruso, Giovanna Maimone, Angelina Lo Giudice, Teresa Romeo, Franco Andaloro
Summary: Microbial communities exhibit different responses to changes in external environmental conditions, especially in extreme environments. This study used microcosm experiments to explore the dynamics of microbial communities under changing pH and redox potential conditions. The results revealed differential responses of microbial communities depending on the starting environmental conditions.
ENVIRONMENTAL RESEARCH
(2024)
Article
Ecology
Dennis Alexander Tebbe, Charlotte Gruender, Leon Dlugosch, Kertu Loehmus, Soenke Rolfes, Martin Koenneke, Yin Chen, Bert Engelen, Hendrik Schaefer
Summary: Saltmarshes are highly productive environments with abundant organosulfur compounds. DMSP, produced by algae, plants, and bacteria, can serve as a precursor for DMSO and DMS. The formation and degradation of these compounds have contrasting effects on global climate. In saltmarsh sediments, DMSO concentrations were found to be significantly higher compared to marine waters. Batch experiments revealed that DMSO could be reduced to DMS and consumed with CH4 production. Changes in microbial communities and gene counts indicated the dominance of specific organisms and genes involved in DMSO reduction. The findings highlight the role of saltmarshes in organic sulfur cycling and its impact on methane production.
Article
Multidisciplinary Sciences
Anna R. Waldeck, Jordon D. Hemingway, Weiqi Yao, Adina Paytan, David T. Johnston
Summary: By examining the isotopic records of marine sulfates in the past 130 million years, it is found that the Delta'O-17 value is close to 0, indicating that the marine sulfate reservoir is strictly controlled by biogeochemical cycling. The steady fractional contribution from microbial sulfur cycling has been maintained over the past 100 million years, despite potential variations in global weathering rates.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Ecology
Sherlynette Perez Castro, Mikayla A. Borton, Kathleen Regan, Isabella Hrabe de Angelis, Kelly C. Wrighton, Andreas P. Teske, Marc Strous, S. Emil Ruff
Summary: Hydrothermal sediments harbor uncultured heterotrophic microbial lineages with the potential for macromolecule degradation. Through experimental manipulation of Guaymas Basin sediments under different redox conditions, heterotrophic thermophiles capable of degrading a broad range of polysaccharides were cultivated. The study revealed new insights into the niches and genomes of microorganisms actively involved in decomposing abundant necromass macromolecules under various thermophilic conditions.
Article
Neurosciences
Jinghao Nicholas Ngiam, Elizabeth Hui-en Thong, Poay Huan Loh, Koo Hui Chan, Mark Y. Chan, Chi-Hang Lee, Adrian F. Low, Huay Cheem Tan, Joshua P. Loh, Hui Wen Sim
Summary: This study found that female patients had a higher risk of cardiac mortality and ischemic stroke after undergoing PPCI for STEMI, even after adjusting for confounders.
JOURNAL OF STROKE & CEREBROVASCULAR DISEASES
(2022)
Article
Cardiac & Cardiovascular Systems
Andie H. Djohan, Jackie Chiu, Ching-Hui Sia, Benjamin W. L. Tung, Zhe Yan Ng, Koo Hui Chan, Mark Chan, William K. F. Kong, Chi-Hang Lee, Gavin Y. Ng, Adrian F. Low, Kian Keong Poh, Huay Cheem Tan, Tiong-Cheng Yeo, Poay Huan Loh
Summary: This study analyzed the clinical characteristics, procedural characteristics, and outcomes of patients with coronary artery ectasia (CAE) undergoing primary percutaneous coronary intervention (PPCI) for ST-elevation myocardial infarction (STEMI). The results showed that despite lower rates of post-PPCI coronary flow recovery, CAE was not associated with unfavorable long-term outcomes.
CARDIOVASCULAR REVASCULARIZATION MEDICINE
(2022)
Article
Cardiac & Cardiovascular Systems
Hui Wen Sim, Elizabeth H. Thong, Andie H. Djohan, Jason Z. Chen, Joon Sin Ser, Poay Huan Loh, Chi-Hang Lee, Mark Y. Chan, Adrian F. Low, Edgar L. Tay, Koo Hui Chan, Huay Cheem Tan, Joshua P. Loh
Summary: Among patients with STEMI who underwent primary PCI, the long-term clinical outcomes of BP-DES and DP-DES implantation were similar.
CARDIOVASCULAR REVASCULARIZATION MEDICINE
(2022)
Article
Cardiac & Cardiovascular Systems
Nicholas W. S. Chew, Chen-Han Ng, Gwyneth Kong, Keng-Siang Lee, Darren J. H. Tan, Oliver Zi-Hern Lim, Yip Han Chin, Bee Choo Tai, Tianyuan Gu, Seung-Jung Park, Duk-Woo Park, Marie-Claude Morice, Theodoros Kofidis, James W. L. Yip, Poay-Huan Loh, Koo-Hui Chan, Adrian F. Low, Chi-Hang Lee, Tiong-Cheng Yeo, Huay-Cheem Tan, Mark Y. Chan
Summary: This study compared percutaneous coronary intervention (PCI) with drug-eluting stents and coronary artery bypass grafting (CABG) in the treatment of left main coronary artery disease (LMCAD) and found no statistically significant difference in cumulative 10-year all-cause mortality between the two groups. However, PCI had a higher rate of unplanned revascularization within 5 years.
AMERICAN JOURNAL OF CARDIOLOGY
(2022)
Article
Cardiac & Cardiovascular Systems
Gwyneth Kong, Nicholas W. S. Chew, Cheng Han Ng, Yip Han Chin, Oliver Z. H. Lim, Anand Ambhore, Gavin Ng, William Kong, Kian-Keong Poh, Roger Foo, James Yip, Tiong-Cheng Yeo, Adrian Fatt-Hoe Low, Chi-Hang Lee, Mark Yan-Yee Chan, Huay-Cheem Tan, Poay-Huan Loh
Summary: A significant proportion of acute myocardial infarction (AMI) patients in Asia do not have standard modifiable risk factors (SMuRFs), and these patients have a higher short-term mortality rate. This highlights the need for greater focus on the management of this high-risk subgroup of patients.
FRONTIERS IN CARDIOVASCULAR MEDICINE
(2022)
Article
Microbiology
Adrian Low, Melissa Soh, Sou Miyake, Henning Seedorf
Summary: The lifelong relationship between microorganisms and hosts has a profound impact on the overall health and physiology of the holobiont. Microbiome composition throughout the life span of a host remains largely understudied. The fecal microbiota of conventionally raised C57BL/6J male mice was characterized throughout almost the entire adult life span. Microbiota changes occur throughout life but are more pronounced in maturing to middle-age mice than in mice later in life. The Bacteroidota-to-Firmicutes ratio shifts in favor of Firmicutes in old and very old mice. More Firmicutes amplicon sequence variants (ASVs) were transient with varying successional patterns than Bacteroidota ASVs. Age-associated compositional differences may have considerable implications for the interpretation and comparability of animal model-based microbiome studies. The sensitivity of the age prediction to dietary perturbations was tested. The predicted age for the western diet-fed animals was older than that of standard diet-fed animals. The study sheds light on the temporal changes within the gut microbiota of laboratory mice over their life span and may inform researchers on the appropriate mouse age for their research.
MICROBIOLOGY SPECTRUM
(2022)
Article
Microbiology
Adrian Low, Jolie Kar Yi Lee, Jean-Sebastien Gounot, Aarthi Ravikrishnan, Yichen Ding, Woei-Yuh Saw, Linda Wei Lin Tan, Don Kyin Nwe Moong, Yik Ying Teo, Niranjan Nagarajan, Henning Seedorf
Summary: This study investigated the abundance and diversity of gut methanogenic Archaea in a multi-ethnic cohort of healthy Singaporeans. The results revealed that Methanobrevibacter smithii is the most prevalent and abundant methanogen in the local population, while Candidatus Methanobrevibacter intestini is the abundant methanogen in a minority of individuals. The observed potential mutual exclusion of M. smithii and Ca. M. intestini supports the hypothesis that these two physiologically similar strains may belong to different Methanobrevibacter species.
MICROBIOLOGY SPECTRUM
(2022)
Article
Cardiac & Cardiovascular Systems
Kai Yi Tay, Kan Xing Wu, Florence Wen Jing Chioh, Matias Ilmari Autio, Nicole Min Qian Pek, Balakrishnan Chakrapani Narmada, Sock-Hwee Tan, Adrian Fatt-Hoe Low, Michelle Mulan Lian, Elaine Guo Yan Chew, Hwee Hui Lau, Shih Ling Kao, Adrian Kee Keong Teo, Jia Nee Foo, Roger Sik Yin Foo, Chew Kiat Heng, Mark Yan Yee Chan, Christine Cheung
Summary: The study highlights the importance of the 6p24.1 locus in endothelial cell function and abnormal vascular physiology, revealing a previously unknown interaction between 6p24.1 and 10q11.21 in the development of CAD. This sheds light on a new area in understanding the mechanisms of CAD progression.
Article
Cardiac & Cardiovascular Systems
Gwyneth Kong, Nicholas W. S. Chew, Cheng Han Ng, Yip Han Chin, Rebecca Zeng, Roger Foo, Koo Hui Chan, Adrian Fatt-Hoe Low, Chi-Hang Lee, Mark Yan-Yee Chan, Tiong-Cheng Yeo, Huay-Cheem Tan, Poay-Huan Loh
Summary: A considerable number of ACS patients without standard modifiable cardiovascular risk factors have higher mortality in the short-term, but this difference attenuates over time.
JOURNAL OF THROMBOSIS AND THROMBOLYSIS
(2022)
Article
Endocrinology & Metabolism
YipHan Chin, Jieyu Lim, Gwyneth Kong, Cheng Han Ng, Rachel Goh, Mark Muthiah, Anurag Mehta, Bryan Chong, Chaoxing Lin, Kai En Chan, William Kong, Kian Keong Poh, Roger Foo, Ping Chai, Tiong-Cheng Yeo, Adrian F. Low, Chi Hang Lee, Huay Cheem Tan, Mark Yan-Yee Chan, Poay-Huan Richards, Poay-Huan Loh, Nicholas W. S. Chew
Summary: This study examined the prevalence and prognosis of hepatic steatosis and fibrosis in patients with post-acute myocardial infarction (AMI). The results showed that both hepatic steatosis and fibrosis are common in AMI patients and are associated with mortality. Hepatic steatosis and fibrosis could help stratify the risk of AMI patients.
DIABETES OBESITY & METABOLISM
(2023)
Article
Health Care Sciences & Services
Nicholas W. S. Chew, Bryan Chong, Si Min Kuo, Jayanth Jayabaskaran, Mingshi Cai, Huili Zheng, Rachel Goh, Gwyneth Kong, Yip Han Chin, Syed Saqib Imran, Michael Liang, Patrick Lim, Thon Hon Yong, Boon Wah Liew, Pow Li Chia, Hee Hwa Ho, David Foo, Deanna Khoo, Zijuan Huang, Terrance Chua, Jack Wei Chieh Tan, Khung Keong Yeo, Derek Hausenloy, Hui Wen Sim, Jieli Kua, Koo Hui Chan, Poay Huan Loh, Toon Wei Lim, Adrian F. Low, Ping Chai, Chi Hang Lee, Tiong Cheng Yeo, James Yip, Huay Cheem Tan, Mamas A. Mamas, Stephen J. Nicholls, Mark Y. Chan
Summary: The incidence of AMI is projected to continue rising, with overweight/obesity emerging as the fastest-growing metabolic risk factor and the leading risk factor for AMI-related mortality. Individuals of Indian and Malay descent bear a disproportionate burden of overweight/obesity incidence and AMI-related mortality.
LANCET REGIONAL HEALTH-WESTERN PACIFIC
(2023)
Article
Microbiology
Adrian Low, Xiu Qi Koh, Yichen Ding, Henning Seedorf
Summary: The complete genome of Paramuribaculum intestinale type strain DSM 100749(T)(=JCM 33114(T)) is presented, which is a recently described species of Muribaculaceae and was isolated from the gut of C57BL/6 laboratory mice. The genome can serve as an important resource for comparative genomics approaches.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2023)
Article
Microbiology
Adrian Low, Maxim Sheludchenko, Huay Ee Cheng, Xiu Qi Koh, Jonathan Wei Jie Lee
Summary: Anaerostipes hadrus strains BA1 and GIF7 were isolated from a healthy man. Their complete genomes' sizes are 2,946,270 bp and 2,907,308 bp respectively. They have high similarity with each other, but low similarity with A. hadrus ATCC 29173T.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2023)
