Article
Cell Biology
Md Akram Hossain, Yunfeng Lin, Garrett Driscoll, Jia Li, Anne McMahon, Joshua Matos, Haichao Zhao, Daisuke Tsuchimoto, Yusaku Nakabeppu, Jianjun Zhao, Shan Yan
Summary: APE2 is essential for activating the ATR DDR pathway in response to various stressful conditions in Xenopus laevis egg extracts and human pancreatic cancer cells. Inhibition of APE2 leads to increased DNA damage and sensitizes cancer cells to chemotherapy drugs, indicating its crucial role in maintaining genome integrity.
FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
(2021)
Review
Cell Biology
Yulia Mitiagin, Ari Barzilai
Summary: The review summarizes accumulating evidence that ataxia-telangiectasia mutated kinase is crucial for maintaining cellular homeostasis and has both nuclear and cytoplasmic functions. However, the specific functions of ataxia-telangiectasia mutated that lead to cerebellar degeneration when lost are still unknown. The review discusses the role of ataxia-telangiectasia mutated in cerebellar pathology, including its nuclear functions in DNA damage response circuits and its cytoplasmic and mitochondrial functions related to cellular homeostasis.
NEURAL REGENERATION RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Rebekka Kitzinger, Gerhard Fritz, Christian Henninger
Summary: Rho GTPases like RAC1 are molecular switches that trigger signal transduction pathways in response to extracellular stimuli. This study investigates the role of RAC1 in the doxorubicin-induced DNA damage response (DDR). Silencing RAC1 and manipulating its nuclear localization reveal that RAC1 is required for a substantial activation of DDR, and balanced levels of active/inactive RAC1 inside the nucleus are crucial for this response.
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Sarah May, Cordula Hirsch, Alexandra Rippl, Alexander Buerkle, Peter Wick
Summary: This study investigated the genotoxicity of different engineered nanomaterials (ENMs) using two complementary in vitro assays. The results showed that certain ENMs exhibited cytotoxicity and genotoxicity, while others did not have these effects.
Article
Chemistry, Analytical
Bei Yan, Heng Fan, Hanxu Ji, Siqi Li, Hao Hu, Xiuli Gu, Shaotong Jia, Ying Liu, Jing Guo, Zhongzheng Yang, Lili Zhou, Xianjin Xiao, Longjie Li, Zenghui Mao
Summary: A detection system based on terminal deoxynucleotidyl transferase and DNA strand displacement fluorescent probe was developed to quantitatively detect breakpoints at the DNA molecular level. The system showed reasonable correlation and better prediction efficiency compared to the widely accepted SCSA method, and its applicability was proven in assisted reproductive technology procedures.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Kevin M. Wernke, Alina Tirla, Mengzhao Xue, Yulia Surovtseva, Fabian S. Menges, Seth B. Herzon
Summary: Colibactin is a genotoxic metabolite produced by commensal-pathogenic members of the human microbiome, potentially linked to tumorigenesis. Researchers synthesized and studied colibactin 742 (4), finding that it induces DNA interstrand-cross-links and activates DNA repair pathways, providing a new approach to study the genotoxic effects of colibactin.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Sumin Feng, Sai Ma, Kejiao Li, Shengxian Gao, Shaokai Ning, Jinfeng Shang, Ruiyuan Guo, Yingying Chen, Britny Blumenfeld, Itamar Simon, Qing Li, Rong Guo, Dongyi Xu
Summary: The study identifies the histone chaperone ASF1 as a partner of RIF1 in the 53BP1-RIF1 pathway, linking DNA repair and changes in chromatin structure. ASF1 is recruited to chromatin flanking DNA breaks and promotes non-homologous end joining (NHEJ) through its histone chaperone activity. ASF1 acts in the same NHEJ pathway as RIF1, but through a parallel pathway with the shieldin complex. ASF1 deficiency suppresses defects in end resection and homologous recombination in BRCA1-deficient cells. Mechanistically, ASF1 compacts adjacent chromatin to protect DNA ends from resection. The findings reveal the importance of the RIF1-ASF1 complex in stimulating NHEJ for DNA repair.
NATURE COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Genevieve Trombly, Afaf Milad Said, Alexei P. Kudin, Viktoriya Peeva, Janine Altmueller, Kerstin Becker, Karl Koehrer, Gabor Zsurka, Wolfram S. Kunz
Summary: The study investigated the effects of hydrogen peroxide on mitochondrial DNA integrity. The results showed that hydrogen peroxide treatment resulted in DNA breaks, which were then repaired through rapid repair of single-strand breaks and degradation of double-strand breaks-generated linear fragments. Inactivation of mitochondrial DNA degradation resulted in the persistence of linear fragments in mutant cells without affecting the repair of single-strand breaks. These findings highlight the interplay between DNA repair and degradation processes, and the potential generation of somatic mitochondrial DNA deletions.
Article
Oncology
Qunsong Tan, Kaifeng Niu, Yuqi Zhu, Zixiang Chen, Yueyang Li, Mengge Li, Di Wei, Adayabalam S. Balajee, Hongbo Fang, Yongliang Zhao
Summary: The study demonstrates that RNF8 ubiquitinates RecQL4 protein, facilitating its dissociation from DSB sites and hindering the recruitment of downstream DSB repair proteins. RecQL4 also interacts with WRAP53 beta, which enhances its association with RNF8. Overall, the ubiquitination event mediated by RNF8 is essential for RecQL4's function in DSB repair.
Article
Environmental Sciences
Wen Ji, Charbel Abou Khalil, Michel Boufadel, Gina Coelho, Cosan Daskiran, Brian Robinson, Thomas King, Kenneth Lee, Michal Galus
Summary: This study investigated the effects of various factors on droplet size distribution and accommodated oil concentration in WAF and CEWAF experiments. The results showed that the DSD of WAFs and CEWAFs differed at different oil loading concentrations, with high concentration CEWAFs requiring longer mixing and resting time.
Article
Biochemistry & Molecular Biology
Kyle B. Vrtis, James M. Dewar, Gheorghe Chistol, R. Alex Wu, Thomas G. W. Graham, Johannes C. Walter
Summary: Research has shown that collisions between the replicative CMG helicase and nicks in DNA templates can lead to different forms of double-strand breaks, causing replisome disassembly.
Article
Biochemistry & Molecular Biology
Shaolong Zhang, Pengzhao Shang, Kun Gao, Guomeng Zhao, Jingping Zhou, Rong Chen, Xiaoju Ning, Changying Guo
Summary: The DNA repair machinery plays a role in estrogen-dependent transactivation. The study reveals that mechanisms underlying estrogen-induced DNA damage are complex. It is found that the process of 17 beta-estradiol (E2)-induced ROS production can be divided into two phases, and oxidative DNA damage occurs at different temporal and spatial locations due to intracellular Ca2+ fluctuation and ER alpha-dependent transcription. The study also shows that DNA oxidation is not necessary for estrogen-responsive gene expression, while topoisomerase-mediated DNA strand breaks are essential in estrogen signaling.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2022)
Article
Immunology
Daniel de Oliveira Patricio, Greicy Brisa Malaquias Dias, Lucilene Wildner Granella, Ben Trigg, Helena Claire Teague, Dina Bittencourt, Andre Bafica, Alfeu Zanotto-Filho, Brian Ferguson, Daniel Santos Mansur
Summary: DNA-PKcs plays a role in restricting the spread of Zika virus infection in human cells by influencing the transcription of interferons and related genes. This mechanism is independent of DNA breaks.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Biology
Erwan Goy, Maxime Tomezak, Caterina Facchin, Nathalie Martin, Emmanuel Bouchaert, Jerome Benoit, Clementine de Schutter, Joe Nassour, Laure Saas, Claire Drullion, Priscille M. Brodin, Alexandre Vandeputte, Olivier Molendi-Coste, Laurent Pineau, Gautier Goormachtigh, Olivier Pluquet, Albin Pourtier, Fabrizio Cleri, Eric Lartigau, Nicolas Penel, Corinne Abbadie
Summary: Induction of second primary cancers is a rare but severe complication of curative-intent radiation therapy. Research shows that normal human or mouse dermal fibroblasts exposed to out-of-field radiation dose at the margin of the target volume do not die, but enter a long-lived senescent state, leading to the accumulation of unrepaired DNA single-strand breaks. Some of these senescent cells eventually escape cell cycle arrest and give rise to daughter cells with mutations and invasive properties. This discovery highlights the role of single-strand break-induced senescence as the mechanism of second primary cancer initiation, with potential implications for prevention.
Article
Biochemistry & Molecular Biology
Sijie Liu, Yu Hua, Jingna Wang, Lingyan Li, Junjie Yuan, Bo Zhang, Ziyang Wang, Jianguo Ji, Daochun Kong
Summary: Protection of 30 overhangs in DNA double-strand breaks (DSBs) repair is achieved through the transient formation of RNA-DNA hybrids, with RNA polymerase III (RNAPIII) responsible for synthesizing the RNA strand. CtIP and MRN nuclease activity are required for initiating RNAPIII-mediated RNA synthesis at DSBs. Reduced RNAPIII levels suppress homologous recombination (HR) and lead to genetic loss > 30 bp at DSBs.
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.