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Article ; Online: Green polyaspartic acid as a novel permanganate activator for enhanced degradation of organic contaminants: Role of reactive Mn(III) species.

Yu, Yanghai / Chen, Tiansheng / Guan, Xiaohong / Dong, Hongyu / Qiao, Junlian

2023 Volume 460, Page(s) 132433

Abstract: Attention has been long focused on enhancing permanganate (Mn(VII)) oxidation capacity for eliminating organic contaminants via generating active manganese intermediates (AMnIs). Nevertheless, limited consideration has been given to the unnecessary ... ...

Abstract	Attention has been long focused on enhancing permanganate (Mn(VII)) oxidation capacity for eliminating organic contaminants via generating active manganese intermediates (AMnIs). Nevertheless, limited consideration has been given to the unnecessary consumption of Mn(VII) due to the spontaneous disproportionation of AMnIs during their formation. In this work, we innovatively introduced green polyaspartic acid (PASP) as both reducing and chelating agents to activate Mn(VII) to enhance the oxidation capacity and utilization efficiency of Mn(VII). Multiple lines of evidence suggest that Mn(III), existing as Mn(III)-PASP complex, was generated and dominated the degradation of bisphenol A (BPA) in the Mn(VII)/PASP system. The stabilized Mn(III) species enabled Mn(VII) utilization efficiency in the Mn(VII)/PASP system to be higher than that in Mn(VII) alone. Moreover, the electrophilic Mn(III) species was verified to mainly attack the inclusive benzene ring and isopropyl group to realize BPA oxidation and its toxicity reduction in the Mn(VII)/PASP system. In addition, the Mn(VII)/PASP system showed the potential for selectively oxidizing organic contaminants bearing phenol and aniline moieties in real waters without interference from most of coexisting water matrices. This work brightens an overlooked route to both high oxidation capacity and efficient Mn(VII) utilization in the Mn(VII)-based oxidation processes.
Language	English
Publishing date	2023-08-31
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2023.132433
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Article ; Online: Continuous Flow Electrochemistry Enables Practical and Site-Selective C-H Oxidation.

Chen, Tian-Sheng / Long, Hao / Gao, Yuxing / Xu, Hai-Chao

Angewandte Chemie (International ed. in English)

2023 Volume 62, Issue 40, Page(s) e202310138

Abstract: The selective oxygenation of ubiquitous C( ... ...

Abstract	The selective oxygenation of ubiquitous C(sp
Language	English
Publishing date	2023-08-28
Publishing country	Germany
Document type	Journal Article
ZDB-ID	2011836-3
ISSN	1521-3773 ; 1433-7851
ISSN (online)	1521-3773
ISSN	1433-7851
DOI	10.1002/anie.202310138
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Article ; Online: Unraveling the intrinsic mechanism behind the selective oxidation of sulfonamide antibiotics in the Mn(II)/periodate process: The overlooked surface-mediated electron transfer process.

Yu, Yanghai / Dong, Hongyu / Chen, Tiansheng / Sun, Yuankui / Guan, Xiaohong

Water research

2023 Volume 244, Page(s) 120507

Abstract: Mn(II) exhibits a superb ability in activating periodate (PI) for the efficient degradation of aqueous organic contaminants. Nevertheless, ambiguous conclusions regarding the involved reactive species contributing to the removal of organic contaminants ... ...

Abstract	Mn(II) exhibits a superb ability in activating periodate (PI) for the efficient degradation of aqueous organic contaminants. Nevertheless, ambiguous conclusions regarding the involved reactive species contributing to the removal of organic contaminants remain unresolved. In this work, we found that the Mn(II)/PI process showed outstanding and selective reactivity for oxidizing sulfonamides with the removal ranging from 57.1% to 100% at pH 6.5. Many lines of evidence suggest that the in-situ formed colloidal MnO
MeSH term(s)	Anti-Bacterial Agents ; Manganese Compounds ; Oxides ; Electrons ; Oxidation-Reduction ; Sulfanilamide ; Sulfonamides
Chemical Substances	Anti-Bacterial Agents ; metaperiodate (B45A1BUM4Q) ; Manganese Compounds ; Oxides ; Sulfanilamide (21240MF57M) ; Sulfonamides
Language	English
Publishing date	2023-08-19
Publishing country	England
Document type	Journal Article
ZDB-ID	202613-2
ISSN	1879-2448 ; 0043-1354
ISSN (online)	1879-2448
ISSN	0043-1354
DOI	10.1016/j.watres.2023.120507
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Article ; Online: Medaka (Oryzias latipes) Olpax6.2 acquires maternal inheritance and germ cells expression, but functionally degenerate in the eye

Pan, Qihua / Luo, Junzhi / Jiang, Yuewen / Wang, Zhi / Lu, Ke / Chen, Tiansheng

Gene. 2023 July, v. 872 p.147439-

2023

Abstract: Gene duplication provides raw material for the evolution of genetic and phenotypic complexity. It has remained a long-standing mystery how duplicated genes evolve into new genes by neofunctionalization via the acquisition of new expression and/or ... ...

Abstract	Gene duplication provides raw material for the evolution of genetic and phenotypic complexity. It has remained a long-standing mystery how duplicated genes evolve into new genes by neofunctionalization via the acquisition of new expression and/or activity and simultaneous loss of the old expression and activity. Fishes have many gene duplicates from whole genome duplication, making them excellent for studying the evolution of gene duplicates. In the fish medaka (Oryzias latipes), an ancestral pax6 gene has given rise to Olpax6.1 and Olpax6.2. Here we report that medaka Olpax6.2 is evolving towards neofunctionalization. A chromosomal syntenic analysis indicated that Olpax6.1 and Olpax6.2 are structurally co-homologous to the single pax6 in other organisms. Interestingly, Olpax6.2 maintains all conserved coding exons but loses the non-coding exons of Olpax6.1, and has 4 promoters versus 8 in Olpax6.1. RT-PCR revealed that Olpax6.2 maintains expression in the brain eye, pancreas as Olpax6.1. Surprisingly, Olpax6.2 also exhibits maternal inheritance and gonadal expression by RT-PCR, in situ hybridization and RNA transcriptome analysis. The expression and distribution of Olpax6.2 is not different from Olpax6.1 in the adult brain, eye and pancreas, but exhibited overlapping and distinct expression in early embryogenesis. We show that ovarian Olpax6.2 expression occurs in female germ cells. Olpax6.2 knockout shows no obvious defect in eye development, while Olpax6.1 F0 mutant have severe defects in eye development. Thus, Olpax6.2 acquires maternal inheritance and germ cell expression, but functionally degenerates in the eye, making this gene as an excellent model to study the neofunctionalization of duplicated genes.
Keywords	Oryzias latipes ; RNA ; adults ; brain ; embryogenesis ; evolution ; exons ; eyes ; females ; fish ; gene duplication ; germ cells ; gonads ; hybridization ; models ; mutants ; pancreas ; phenotype ; raw materials ; transcriptomics ; Eye ; Genome duplication ; Germ cell ; Pax6 ; PAX6 ; dpf ; PCR ; RT-PCR ; qRT-PCR ; ISH ; PGC ; WGD ; CRISPR/Cas9 ; lnc4 ; Ng ; DAPI ; PD ; HD ; PST ; NBT/BCIP
Language	English
Dates of publication	2023-07
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	391792-7
ISSN	1879-0038 ; 0378-1119
ISSN (online)	1879-0038
ISSN	0378-1119
DOI	10.1016/j.gene.2023.147439
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Article ; Online: Phthalocyanine blue leaching and exposure effects on Microcystis aeruginosa (cyanobacteria) of photoaged microplastics.

Zeng, Ganning / Dai, Mengzheng / Liu, Peirui / Chen, Tiansheng / Hu, Lingling / Luo, Hongwei / Zhou, Qian / Du, Mingming / Pan, Xiangliang

Journal of hazardous materials

2024 Volume 469, Page(s) 133984

Abstract: Light-stabilizing additives may contribute to the overall pollution load of microplastics (MPs) and potentially enter the food chain, severely threatening aquatic life and human health. This study investigated the variation between polystyrene (PS) MPs ... ...

Abstract	Light-stabilizing additives may contribute to the overall pollution load of microplastics (MPs) and potentially enter the food chain, severely threatening aquatic life and human health. This study investigated the variation between polystyrene (PS) MPs and phthalocyanine blue (CuPC)-containing MPs before and after photoaging, as well as their effects on Microcystis aeruginosa. The presence of PS-MPs increased cell mortality, antioxidant enzyme activity, and the variation in extracellular components, while the presence of CuPC exacerbated these variations. CuPC-containing MPs caused different increasing trends in superoxide dismutase and malondialdehyde activities due to electron transfer across the membrane. Transcriptomic analysis revealed that the MPs and CuPC affected various cellular processes, with the greatest impact being on cell membranes. Compared with MPs, CuPC negatively affected ribosome and polysaccharide formation. These findings provide insights into the molecular mechanisms underlying the cellular response to MPs and their associated light-stabilizer pollution and imply the necessity for mitigating the pollution of both MPs and light-stabilizers.
MeSH term(s)	Humans ; Microcystis ; Microplastics/toxicity ; Plastics/toxicity ; Cyanobacteria ; Antioxidants ; Polystyrenes ; Water Pollutants, Chemical/toxicity ; Indoles ; Organometallic Compounds
Chemical Substances	copper phthalocyanine (3VEX9T7UT5) ; Microplastics ; Plastics ; Antioxidants ; Polystyrenes ; Water Pollutants, Chemical ; Indoles ; Organometallic Compounds
Language	English
Publishing date	2024-03-07
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	1491302-1
ISSN	1873-3336 ; 0304-3894
ISSN (online)	1873-3336
ISSN	0304-3894
DOI	10.1016/j.jhazmat.2024.133984
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Article ; Online: Neutral Phenolic Contaminants Are Not Necessarily More Resistant to Permanganate Oxidation Than Their Dissociated Counterparts: Importance of Proton-Coupled Electron Transfer.

Chen, Tiansheng / Dong, Hongyu / Yu, Yanghai / Chen, Jie / Xu, Jihong / Sun, Yuankui / Guan, Xiaohong

Environmental science & technology

2023 Volume 57, Issue 45, Page(s) 17620–17628

Abstract: Despite decades of research on phenols oxidation by permanganate, there are still considerable uncertainties regarding the mechanisms accounting for the unexpected parabolic pH-dependent oxidation rate. Herein, the pH effect on phenols oxidation was ... ...

Abstract	Despite decades of research on phenols oxidation by permanganate, there are still considerable uncertainties regarding the mechanisms accounting for the unexpected parabolic pH-dependent oxidation rate. Herein, the pH effect on phenols oxidation was reinvestigated experimentally and theoretically by highlighting the previously unappreciated proton transfer. The results revealed that the oxidation of protonated phenols occurred via proton-coupled electron transfer (PCET) pathways, which can switch from ETPT (electron transfer followed by proton transfer) to CEPT (concerted electron-proton transfer) or PTET (proton transfer followed by electron transfer) with an increase in pH. A PCET-based model was thus established, and it could fit the kinetic data of phenols oxidation by permanganate well. In contrast with what was previously thought, both the simulating results and the density functional theory calculation indicated the rate of CEPT reaction of protonated phenols with OH
MeSH term(s)	Protons ; Electrons ; Hydrogen-Ion Concentration ; Oxidation-Reduction ; Electron Transport ; Phenols ; Kinetics
Chemical Substances	Protons ; permanganic acid (14333-13-2) ; Phenols
Language	English
Publishing date	2023-10-30
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5851
ISSN (online)	1520-5851
DOI	10.1021/acs.est.3c05495
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Article ; Online: A medaka gonad-specific lncRNA may act as pri-miR-202 to regulate testicular endocrine homeostasis and spermatogenesis.

Wang, Qian / Deng, Jiajie / Jiang, Yuewen / Wang, Zhi / Xia, Bilin / Chen, Tiansheng

Theriogenology

2023 Volume 214, Page(s) 273–285

Abstract: A large number of long non-coding RNAs (lncRNAs) are expressed in animal gonads, but their functions are poorly understood. In this study, a gonad-specific lncRNA, termed lnc4, was identified and characterized in the model fish medaka (Oryzias latipes). ... ...

Abstract	A large number of long non-coding RNAs (lncRNAs) are expressed in animal gonads, but their functions are poorly understood. In this study, a gonad-specific lncRNA, termed lnc4, was identified and characterized in the model fish medaka (Oryzias latipes). The expression pattern and in vitro functional analyses indicated that lnc4 was likely to be a primary transcript of miR-202 (pri-miR-202). Results of single-molecule fluorescence in situ hybridization demonstrated that the precursor miR-202 (pre-miR-202) was highly expressed in the nuclei of testicular somatic cells, including Leydig and Sertoli cells, whereas only a small amount of lnc4 molecules could be detected co-expressed with pre-miR-202 in Sertoli cells due to its low expression level. Deletion of the lnc4 locus led to a significant reduction in testis size and a dramatic decrease in the number of male germ cells, as well as a reduction in sperm viability. Moreover, lnc4 knockout resulted in enhanced synthesis and secretion of testicular somatic cells and accelerated differentiation of immature male germ cells. Taken together, functional studies of lnc4 and its mature transcript miR-202 will contribute to the understanding of the important role of non-coding RNAs in animal or human reproductive disorders.
MeSH term(s)	Male ; Humans ; Animals ; Testis/metabolism ; Oryzias/genetics ; Oryzias/metabolism ; RNA, Long Noncoding/genetics ; RNA, Long Noncoding/metabolism ; In Situ Hybridization, Fluorescence/veterinary ; Semen ; Gonads ; Spermatogenesis/genetics ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Homeostasis
Chemical Substances	RNA, Long Noncoding ; MicroRNAs ; MIRN202 microRNA, human
Language	English
Publishing date	2023-10-24
Publishing country	United States
Document type	Journal Article
ZDB-ID	189232-0
ISSN	1879-3231 ; 0093-691X
ISSN (online)	1879-3231
ISSN	0093-691X
DOI	10.1016/j.theriogenology.2023.10.020
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Article ; Online: Medaka (Oryzias latipes) Olpax6.2 acquires maternal inheritance and germ cells expression, but functionally degenerate in the eye.

Pan, Qihua / Luo, Junzhi / Jiang, Yuewen / Wang, Zhi / Lu, Ke / Chen, Tiansheng

Gene

2023 Volume 872, Page(s) 147439

Abstract	Gene duplication provides raw material for the evolution of genetic and phenotypic complexity. It has remained a long-standing mystery how duplicated genes evolve into new genes by neofunctionalization via the acquisition of new expression and/or activity and simultaneous loss of the old expression and activity. Fishes have many gene duplicates from whole genome duplication, making them excellent for studying the evolution of gene duplicates. In the fish medaka (Oryzias latipes), an ancestral pax6 gene has given rise to Olpax6.1 and Olpax6.2. Here we report that medaka Olpax6.2 is evolving towards neofunctionalization. A chromosomal syntenic analysis indicated that Olpax6.1 and Olpax6.2 are structurally co-homologous to the single pax6 in other organisms. Interestingly, Olpax6.2 maintains all conserved coding exons but loses the non-coding exons of Olpax6.1, and has 4 promoters versus 8 in Olpax6.1. RT-PCR revealed that Olpax6.2 maintains expression in the brain eye, pancreas as Olpax6.1. Surprisingly, Olpax6.2 also exhibits maternal inheritance and gonadal expression by RT-PCR, in situ hybridization and RNA transcriptome analysis. The expression and distribution of Olpax6.2 is not different from Olpax6.1 in the adult brain, eye and pancreas, but exhibited overlapping and distinct expression in early embryogenesis. We show that ovarian Olpax6.2 expression occurs in female germ cells. Olpax6.2 knockout shows no obvious defect in eye development, while Olpax6.1 F0 mutant have severe defects in eye development. Thus, Olpax6.2 acquires maternal inheritance and germ cell expression, but functionally degenerates in the eye, making this gene as an excellent model to study the neofunctionalization of duplicated genes.
MeSH term(s)	Animals ; Female ; Oryzias/genetics ; Oryzias/metabolism ; Maternal Inheritance ; RNA/genetics ; In Situ Hybridization ; Germ Cells
Chemical Substances	RNA (63231-63-0)
Language	English
Publishing date	2023-04-22
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	391792-7
ISSN	1879-0038 ; 0378-1119
ISSN (online)	1879-0038
ISSN	0378-1119
DOI	10.1016/j.gene.2023.147439
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Article: Understanding the Importance of Periodate Species in the pH-Dependent Degradation of Organic Contaminants in the H₂O₂/Periodate Process

Chen, Tiansheng / Sun, Yuankui / Dong, Hongyu / Chen, Jie / Yu, Yanghai / Ao, Zhimin / Guan, Xiaohong

Environmental science & technology. 2022 July 07, v. 56, no. 14

2022

Abstract: Although periodate-based advanced oxidation processes have been proven to be efficient in abating organic contaminants, the activation properties of different periodate species remain largely unclear. Herein, by highlighting the role of H₄IO₆–, we ... ...

Abstract	Although periodate-based advanced oxidation processes have been proven to be efficient in abating organic contaminants, the activation properties of different periodate species remain largely unclear. Herein, by highlighting the role of H₄IO₆–, we reinvestigated the pH effect on the decontamination performance of the H₂O₂/periodate process. Results revealed that elevating pH from 2.0 to 10.0 could markedly accelerate the rates of organic contaminant decay but decrease the amounts of organic contaminant removal. This pH-dependent trend of organic contaminant degradation corresponded well with the HO· yield and the variation of periodate species. Specifically, although ¹O₂ could be detected at pH 9.0, HO· was determined to be the major reactive oxidizing species in the H₂O₂/periodate process under all the tested pH levels. Furthermore, it was suggested that only H₄IO₆– and H₂I₂O₁₀⁴– could serve as the precursors of HO·. The second-order rate constant for the reaction of H₂I₂O₁₀⁴– species with H₂O₂ was determined to be ∼1199.5 M–¹ s–¹ at pH 9.0, which was two orders of magnitude greater than that of H₄IO₆– (∼2.2 M–¹ s–¹ at pH 3.0). Taken together, the reaction pathways of H₂O₂ with different periodate species were proposed. These fundamental findings could improve our understanding of the periodate-based advanced oxidation processes.
Keywords	decontamination ; environmental science ; oxidation ; pH
Language	English
Dates of publication	2022-0707
Size	p. 10372-10380.
Publishing place	American Chemical Society
Document type	Article
ISSN	1520-5851
DOI	10.1021/acs.est.2c02446
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Article ; Online: Efficient gene editing in a medaka (

Pan, Qihua / Luo, Junzhi / Jiang, Yuewen / Wang, Zhi / Lu, Ke / Chen, Tiansheng

Journal of Zhejiang University. Science. B

2022 Volume 23, Issue 1, Page(s) 74–83

Abstract: Generation of mutants with clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) is commonly carried out in fish species by co-injecting a mixture ... ...

Abstract	Generation of mutants with clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) is commonly carried out in fish species by co-injecting a mixture of
MeSH term(s)	Animals ; CRISPR-Cas Systems ; Cell Line ; Gene Editing ; Oryzias/genetics ; RNA, Guide, CRISPR-Cas Systems/genetics ; RNA, Transfer/genetics
Chemical Substances	RNA, Guide, CRISPR-Cas Systems ; RNA, Transfer (9014-25-9)
Language	English
Publishing date	2022-01-10
Publishing country	China
Document type	Journal Article
ZDB-ID	2247290-3
ISSN	1862-1783 ; 1673-1581
ISSN (online)	1862-1783
ISSN	1673-1581
DOI	10.1631/jzus.B2100343
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