Article
Chemistry, Multidisciplinary
Ruofei Zhang, Lei Chen, Qian Liang, Juqun Xi, Hanqing Zhao, Yiliang Jin, Xingfa Gao, Xiyun Yan, Lizeng Gao, Kelong Fan
Summary: Nanozymes with catalase-like activity, especially ferrihydrite, show potential in relieving tumor hypoxia for adjuvant radiotherapy. The surface iron-associated hydroxyl groups of ferrihydrite dominantly affect its catalytic activity. Moreover, ferrihydrite constantly catalyzes the decomposition of H2O2 to release O-2 in a specific pH range, enhancing the therapeutic effect of radiotherapy in the physiological environment.
Article
Nanoscience & Nanotechnology
Zi-Yang Liao, Wei-Wei Gao, Ning-Ning Shao, Jia-Min Zuo, Tao Wang, Meng-Zhen Xu, Feng-Xiu Zhang, Ya-Mu Xia
Summary: FePO4-HG, a new antibacterial agent, has demonstrated excellent antibacterial ability against antibiotic-resistant pathogens and can promote wound healing.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Food Science & Technology
Alam Zeb
Summary: The review examined the different classes of polyphenolic compounds present in commonly consumed edible oils, finding that the composition of these compounds varied depending on the origin of the oil. Soybean, sunflower, olive, and brassica oils received higher attention in terms of polyphenol composition.
FOOD RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Zhiwei Wang, Wenlong Wang, Jin Wang, Dingsheng Wang, Milan Liu, Qianyuan Wu, Hongying Hu
Summary: This study demonstrates a regulatory mechanism based on the electron filling and orbital energies of metal active centers and provides a rational catalyst design strategy for achieving ultrahigh H2O2-decomposition activity. Among the investigated platinum-group-metal active centers, Ir-N-4 with partially occupied d(x2-y2) and d(xz) orbitals and the highest d-band center shows the strongest interaction with H2O2 and the lowest energy barrier for its decomposition. The single-atom Ir catalyst (Ir-NC) exhibits an ultrahigh H2O2-decomposition capacity, which is 1614 times higher than that of natural catalase, and surface-adsorbed atomic oxygen is identified as the key intermediate for O2 generation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mingchen Liang, Xueluer Mu, Yue Li, Yuanhang Tan, Xiaoying Hao, Ying Tang, Zigeng Wang, Wenbi Feng, Yingxi Lu, Xianfeng Zhou
Summary: A supramolecular strategy is developed to tune the stacking pattern of photosensitizer molecules in their aggregates, optimizing the efficiency of photothermal therapy and photodynamic therapy. The study reveals that BTH-Cy7-TCF, with loose molecular stacks formed by fine-tuning hydrogen bonding and intermolecular pi-pi interactions, exhibits higher singlet oxygen quantum yield and competitive photothermal conversion efficiency compared to IND-Cy7-TCF in their aggregated states, enhancing the synergistic effect of photodynamic therapy/photothermal therapy.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hyung Shik Kim, Sieun Lee, Dong Yun Lee
Summary: Aurozyme, a novel nanomedicine composed of gold nanoparticles and glycyrrhizin, shows promise as a therapeutic strategy for colitis. It converts harmful peroxidase-like activity to beneficial catalase-like activity, effectively scavenging reactive oxygen/reactive nitrogen species and damage-associated molecular patterns. It promotes anti-inflammatory effects, restores intestinal function, and increases beneficial probiotics, highlighting its potential for the treatment of inflammatory diseases.
Editorial Material
Biochemistry & Molecular Biology
Hosni M. Hassan
Summary: This commentary discusses the origin of the concept of using redox cycling compounds to generate partially reduced oxygen species to cause oxidative stress. It describes how this finding revolutionized the field of oxygen free radicals and oxidative stress and its continued relevance and impact in the field.
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Imran Ozer, George A. Pitoc, Juliana M. Layzer, Angelo Moreno, Lyra B. Olson, Kyle D. Layzer, Angus M. Hucknall, Bruce A. Sullenger, Ashutosh Chilkoti
Summary: RNA aptamers are a promising class of therapeutics, but their poor blood circulation has limited their clinical potential. In this study, researchers address this limitation by conjugating RNA aptamers with a next-generation PEG-like brush polymer. The conjugate retains the therapeutic action of the drug and can be easily reversed, while avoiding the reactivity of pre-existing PEG antibodies. These findings have important implications for rescuing the PEGylation of RNA therapeutics and vaccines from the adverse effects of PEG.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Lili Xu, Jinxing Chen, Qian Ma, Daiyong Chao, Xinyang Zhu, Ling Liu, Jin Wang, Youxing Fang, Shaojun Dong
Summary: Polymer stabilizers greatly influence the structure, size, and activity of gold nanoparticles (Au NPs). Among the polymers tested, polyacrylic acid-stabilized Au NPs exhibit the highest glucose oxidase-like activity due to their small size and weak spatial resistance. However, further tests reveal limitations in selectivity and activity in physiological environments.
Article
Chemistry, Multidisciplinary
Kaiwei Wan, Chang Long, Bing Jiang, Minmin Liang, Zhiyong Tang, Hui Wang, Xinghua Shi
Summary: The decomposition process of hydrogen peroxide on reductive CoP nanoparticles and the pH-regulated peroxidase and catalase-like activities were studied. OH· radical intermediates complexed with TMB via H-bonds were found to be the main oxidants of TMB. The coverage of O*/OH* from the dissociation of H2O2 on CoP nanoparticles at neutral and alkaline pH conditions enhanced the dehydrogenation of H2O2 to O-2, leading to the transition between peroxidase and catalase-like activities.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Rama Alhasan, Guilherme M. Martins, Pedro P. de Castro, Rahman Shah Zaib Saleem, Ali Zaiter, Isabelle Fries-Raeth, Alexandra Kleinclauss, Caroline Perrin-Sarrado, Patrick Chaimbault, Eufranio N. da Silva Junior, Caroline Gaucher, Claus Jacob
Summary: Decreased selenium levels and increased oxidative stress have been linked to chronic diseases. This study synthesized and evaluated a series of organic selenium compounds for their antioxidant activities. The seleno-hydantoin derivatives exhibited glutathione peroxidase-like activity and show potential for treating chronic diseases.
BIOORGANIC & MEDICINAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Boya Sun, Qiongqiong Lu, Kaixuan Chen, Wenhao Zheng, Zhongquan Liao, Nikolaj Lopatik, Dongqi Li, Martin Hantusch, Shengqiang Zhou, Hai Wang, Zdenek Sofer, Eike Brunner, Ehrenfried Zschech, Mischa Bonn, Richard Dronskowski, Daria Mikhailova, Qinglei Liu, Di Zhang, Minghao Yu, Xinliang Feng
Summary: This study reports on the construction of redox-active phosphorus-oxygen terminals as an attractive strategy to significantly enhance the specific capacities of Nb4C3 MXenes for ultrafast Na+ storage. The molecular-level design of MXene terminals provides opportunities for developing high-capacity and fast-charging electrodes, alleviating the energy-power tradeoff typical for energy-storage devices.
ADVANCED MATERIALS
(2022)
Article
Plant Sciences
Hui Xu, Zhen Li, Peng-Fei Jiang, Li Zhao, Chang Qu, Yves Van de Peer, Yan-Jing Liu, Qing-Yin Zeng
Summary: Enzymes are essential for all living systems, and in plants, the glutaredoxin (GRX) family of enzymes plays important roles in development and stress tolerance. This study identified and classified 41 GRX genes in the poplar genome based on differences in gene structure, expression patterns, subcellular localization, enzymatic activity, and substrate specificity. Site-directed mutagenesis revealed that the divergence of active site motifs among different classes of GRX proteins led to substrate switches, providing new insights into the molecular evolution of these important plant enzymes.
Article
Chemistry, Analytical
Nicolas E. Holubowitch, Ayesha Jabbar
Summary: This study reports the spectroelectrochemistry of five active electrolyte species from different classes of compounds in aqueous redox flow batteries. UV-vis absorbance spectra were used to monitor the redox transformations of the electrolytes during cyclic voltammetry and chronoamperometry experiments. The findings provide insights into the performance and degradation of the electrolyte chemistry in redox flow batteries.
MICROCHEMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Valentina Abramenko, Regina A. Suleymanova, Anastasija Zhukova
Summary: Data from 3046 solar active regions observed over a period of 25 years were used to study the magnetic fluxes of regions with different complexity during the solar cycle. The study found that the fluxes from different classes of regions evolve synchronously and correlate strongly with each other. The deepest solar minimum occurs simultaneously for all classes, and only the simplest regions are observed during this period. The overall shape of the solar cycle is determined by regular regions, while the fine structures of the solar maximum are influenced by the most complex irregular regions. Approximately equal amounts of flux are contributed by A-class and B-class regions during the solar maximum.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Oncology
Takuya Osada, Erika J. Crosby, Kensuke Kaneko, Joshua C. Snyder, Joshua D. Ginzel, Chaitanya R. Acharya, Xiao-Yi Yang, Thomas J. Polascik, Ivan Spasojevic, Rendon C. Nelson, Amy Hobeika, Zachary C. Hartman, Leonard M. Neckers, Andre Rogatko, Philip F. Hughes, Jiaoti Huang, Michael A. Morse, Timothy Haystead, H. Kim Lyerly
Summary: A noninvasive test utilizing the activity of Hsp90 has been developed to differentiate aggressive prostate cancer from less harmful types. In a human study, systemically administered HS196 was able to detect malignant nodules and showed greater uptake in secretory cells.
MOLECULAR CANCER THERAPEUTICS
(2022)
Article
Chemistry, Multidisciplinary
Qingyu Zhou, Justin Doherty, Antonina Akk, Luke E. Springer, Ping Fan, Ivan Spasojevic, Ganesh V. Halade, Huanghe Yang, Christine T. N. Pham, Samuel A. Wickline, Hua Pan
Summary: In this study, the potential of rapamycin perfluorocarbon (PFC) nanoparticles to mitigate cisplatin-induced acute kidney injury was demonstrated with a single preventative dose. The pharmacokinetics and biodistribution of rapamycin were improved by the PFC nanoparticle delivery system. The safety of rapamycin PFC nanoparticles was also confirmed in both in vitro and in vivo experiments.
Article
Chemistry, Analytical
Tin Weitner, Tomislav Friganovic, Davor Sakic
Summary: The study proposes a method for correcting the inner filter effect by changing the position of the optical element, allowing for a linear relationship between fluorescence signals and sample concentration. The results show that the corrected fluorescence signal exhibits a linear response within the concentration range, with minimal calibration slope deviation, effectively eliminating the need for sample dilution or separate absorbance measurements.
ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Sebastian F. Villar, Joaquin Dalla-Rizza, Matias N. Moller, Gerardo Ferrer-Sueta, Leonel Malacrida, David M. Jameson, Ana Denicola
Summary: Protein self-assembly is a common feature in biology, and a new method utilizing intrinsic fluorescence lifetime with phasors is presented to study protein associations. The method was successfully applied to determine the equilibrium dissociation constant (K-D) of hPrx1 and identify its oligomeric states. The phasor approach is highly sensitive and quantitative, offering a valuable tool for assessing protein oligomerization.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Cell Biology
Luksana Chaiswing, Chontida Yarana, William St Clair, Artak Tovmasyan, Ines Batinic-Haberle, Ivan Spasojevic, Daret St Clair
Summary: This study used a redox-active MnP compound to investigate the redox status of ovarian cancer cells. The results showed that chemotherapy-resistant cells were under higher oxidative stress and had increased glycolysis activity and mitochondrial respiration. Altering the redox state could effectively inhibit the growth and metabolic activity of these cells.
OXIDATIVE MEDICINE AND CELLULAR LONGEVITY
(2022)
Article
Endocrinology & Metabolism
Tian Zhang, Julie Kephart, Elizabeth Bronson, Monika Anand, Christine Daly, Ivan Spasojevic, Subha Bakthavatsalam, Katherine Franz, Hannah Berg, Georgia S. Karachaliou, Olga G. James, Lauren Howard, Susan Halabi, Michael R. Harrison, Andrew J. Armstrong, Daniel J. George
Summary: In a phase 1b clinical trial, concurrent administration of disulfiram (DSF) with copper (Cu) was assessed in patients with metastatic castration-resistant prostate cancer (mCRPC). The trial showed that oral DSF as monotherapy was not effective in treating mCRPC due to rapid metabolism into an inactive metabolite, Me-DDC.
Article
Microbiology
Sueden O. Souza, Bruno L. Raposo, Jose F. Sarmento-Neto, Julio S. Reboucas, Danielle P. C. Macedo, Regina C. B. Q. Figueiredo, Beate S. Santos, Anderson Z. Freitas, Paulo E. Cabral Filho, Martha S. Ribeiro, Adriana Fontes
Summary: The study found that the tetracationic metalloporphyrin Zn(II) meso-tetrakis(N-n-hexylpyridinium-2-yl)porphyrin is a promising photosensitizer for antimicrobial photodynamic inactivation of Candida albicans. The results demonstrated effective eradication of yeast and biofilm forms of C. albicans with minimal toxicity to mammalian cells.
Article
Chemistry, Multidisciplinary
Soumen Saha, Samagya Banskota, Jianqiao Liu, Nikita Zakharov, Michael Dzuricky, Xinghai Li, Ping Fan, Sonal Deshpande, Ivan Spasojevic, Kedar Sharma, Mario Juan Borgnia, Jeffrey L. Schaal, Ashutosh Raman, Sarah Kim, Jayanta Bhattacharyya, Ashutosh Chilkoti
Summary: Loading Pt(IV) into genetically engineered nanoparticles can enhance the therapeutic efficacy of platinum drugs, potentially yielding more effective platinum-drug nanoformulations.
Article
Chemistry, Physical
Caio Vinicius de Lima, Julian Juan, Ricardo Faccio, Estela A. Gonzalez, Carolina Pistonesi, Marcelo F. Pistonesi, Julio S. Reboucas
Summary: Nanoscale zero-valent iron/reduced graphene oxide composites show good adsorption performance for arsenic, with the best adsorption effect under acidic conditions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Biomedical
Imran Ozer, Anna Slezak, Parul Sirohi, Xinghai Li, Nikita Zakharov, Yunxin Yao, Jeffrey I. Everitt, Ivan Spasojevic, Stephen L. Craig, Joel H. Collier, Jonathan E. Campbell, David A. D'Alessio, Ashutosh Chilkoti
Summary: In order to solve the problem of the short half-life of biologics, researchers developed an injectable PEG-like conjugate that forms a subcutaneous depot, providing sustained delivery of the drugs. This conjugate showed better pharmacokinetic and pharmacodynamic properties compared to PEG conjugates and branched PEG, and it also remained effective and safe for long-term management of type 2 diabetes without causing an immune response.
Article
Nanoscience & Nanotechnology
Bruno L. Raposo, Sueden Souza, Gleyciane S. Santana, Max T. A. Lima, Jose F. Sarmento-Neto, Julio S. Reboucas, Goreti Pereira, Beate S. Santos, Paulo E. Cabral Filho, Martha S. Ribeiro, Adriana Fontes
Summary: Researchers proposed a novel method of using polyvinylpyrro-lidone (PVP) coated silver nanoparticles (AgNPs) in combination with cationic Zn(II) porphyrins (ZnPs) for photodynamic inactivation (PDI) of Candida albicans infections. The AgNPs-ZnPs system achieved complete eradication of Candida albicans at lower porphyrin concentrations, reducing the risk of antifungal drug resistance.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2023)
Article
Cell Biology
Jinshi Zhao, C. Skyler Cochrane, Javaria Najeeb, David Gooden, Carly Sciandra, Ping Fan, Nadine Lemaitre, Kate Newns, Robert A. Nicholas, Ziqiang Guan, Joshua T. Thaden, Vance G. G. Fowler Jr, Ivan Spasojevic, Florent Sebbane, Eric J. Toone, Clayton Duncan, Richard Gammans, Pei Zhou
Summary: This article reports the preclinical characterization of a slow, tight-binding LpxC inhibitor, LPC-233, with low picomolar affinity. The compound is a rapid bactericidal antibiotic, unaffected by established resistance mechanisms to commercial antibiotics, and displays outstanding activity against a wide range of Gram-negative clinical isolates in vitro. It is orally bioavailable and efficiently eliminates infections caused by susceptible and multidrug-resistant Gram-negative bacterial pathogens in murine soft tissue, sepsis, and urinary tract infection models.
SCIENCE TRANSLATIONAL MEDICINE
(2023)
Article
Biochemistry & Molecular Biology
Sebastian F. Villar, Laura Corrales-Gonzalez, Belen Marquez de los Santos, Joaquin Dalla Rizza, Ari Zeida, Ana Denicola, Gerardo Ferrer-Sueta
Summary: The reduction reactions of cytosolic human peroxiredoxins (Prx) in their disulfide form by thioredoxins (Trx) were studied. The reactivity of the nucleophilic cysteine in Trx was found to be greatly affected by the formation of the Prx-Trx complex. This activation mechanism helps understand the reduction of Prx by alternative reductants involved in redox signaling.
Article
Chemistry, Analytical
Valentina Borko, Tomislav Friganovic, Tin Weitner
Summary: The study presents a detailed procedure for the accurate determination of FeNTA concentration and suggests that the stability of FeNTA solutions may be affected by the Fe: NTA ratio and total concentrations.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Inorganic & Nuclear
Diego S. Vazquez, William A. Agudelo, Gerardo Ferrer-Sueta, Laura Giraudo, Mariano C. Gonzalez C. Lebrero, Martin Aran, Javier Santos
Summary: This study involved the design and generation of a Fe(iii)-binding protein with thiol oxidoreductase activity, and investigated its metal interactions and binding abilities. Results showed that the designed protein retained its functional properties, bound Ga(iii) and Al(iii), and could stably bind two equivalents of Fe(iii) per molecule. Additionally, the study highlighted the importance of reorganizing the electrostatic network for designing functional proteins with both oxidoreductase activity and metal-ion binding ability.
DALTON TRANSACTIONS
(2022)
Correction
Biochemistry & Molecular Biology
Siew Chin Chan, Chih-Wei Tung, Chia-Wei Lin, Yun-Shiuan Tung, Po-Min Wu, Pei-Hsun Cheng, Chuan-Mu Chen, Shang-Hsun Yang
FREE RADICAL BIOLOGY AND MEDICINE
(2024)
Article
Biochemistry & Molecular Biology
Suyuan Liu, Meiling Tan, Jiangxue Cai, Chenxuan Li, Miaoxin Yang, Xiaoxiao Sun, Bin He
Summary: This study reveals that the antibiotic doxycycline effectively inhibits NLRP3 inflammasome activation by targeting mitochondrial translation and mtDNA synthesis, offering potential for the treatment of NLRP3-related diseases.
FREE RADICAL BIOLOGY AND MEDICINE
(2024)
Article
Biochemistry & Molecular Biology
Hao Liu, Nana Li, Ge Kuang, Xia Gong, Ting Wang, Jun Hu, Hui Du, Minxuan Zhong, Jiashi Guo, Yao Xie, Yang Xiang, Shengwang Wu, Yiling Yuan, Xinru Yin, Jingyuan Wan, Ke Li
Summary: Protectin D1 (PTD1) improves hepatic steatosis, inflammation and fibrosis in a NASH mouse model by inhibiting the activation of TLR4 downstream signaling pathway, possibly through upregulation of IRAK-M expression, suggesting a potential new treatment for NASH.
FREE RADICAL BIOLOGY AND MEDICINE
(2024)