Review
Chemistry, Medicinal
Stephen T. Sonis
Summary: Toxicities associated with radiation therapy can be effectively mitigated through interventions aimed at disrupting the biological cascade of toxicity development, with oxidative stress being a key initiator of normal tissue injury. Attempts to supplement endogenous superoxide dismutases or develop synthetic dismutase mimetics have shown some potential, with avasopasem manganese emerging as a promising dismutase mimetic in clinical trials for reducing severe oral mucositis in head and neck cancer patients undergoing chemoradiation.
DRUG DESIGN DEVELOPMENT AND THERAPY
(2021)
Article
Chemistry, Multidisciplinary
Ruomei Li, Zhiyu Zhu, Bolin Zhang, Ting Jiang, Cheng Zhu, Peng Mei, Yu Jin, Ruiqing Wang, Yixin Li, Weiming Guo, Chengxiao Liu, Lunguo Xia, Bing Fang
Summary: Manganese doping is used to enhance bone regeneration by regulating adaptive immunity. It leads to increased recruitment of CD4+ T cells and promotes Th2 cell polarization while inhibiting Th1 cell polarization. This immune environment facilitates the osteogenic ability of bone marrow stromal cells and achieves consequential regeneration of mandibular bone defect.
Article
Chemistry, Multidisciplinary
M. Dolores Garrido, Jamal El Haskouri, Maria D. Marcos, Francisco Perez-Pla, Jose Vicente Ros-Lis, Pedro Amoros
Summary: This study reports the preparation of a novel nanocomposite with enzyme-like activity for decomposing reactive oxygen species (ROS). The nanocomposite, consisting of MnOx needles covered with SiO2 porous material, was synthesized using a two-step procedure. The material was characterized, and its bimodal porosity and efficient enzyme activities were observed. The study also proposed reaction mechanisms and demonstrated the role of silica in catalase activity.
Article
Biochemistry & Molecular Biology
Rachel Aruldas, Laura Buczek Orenstein, Sade Spencer
Summary: Repeated cocaine exposure induces changes in AMPK and pAMPK in different brain regions and cellular compartments, with some differences between acute withdrawal and ongoing cocaine treatment. Pretreatment with metformin, an indirect AMPK activator, enhances acute cocaine-induced locomotor activity but blocks the development of sensitization. These findings provide insights into the dynamics of AMPK activation in subcellular compartments and support the potential use of metformin for the treatment of cocaine use disorder.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Biochemistry & Molecular Biology
Xu Zhang, Depei Zhang, Li Xiang, Qiying Wang
Summary: Manganese superoxide dismutase exhibits rapid product inhibition at high temperatures but is less inhibited at lower temperatures. The temperature-dependent kinetics can be explained by changes in coordination of manganese superoxide dismutase. Cold activation of the enzyme is an adaptive response to low temperatures and plays a role in cold stress signaling and physiological responses.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Visarut Buranasudja, Dolly Rani, Ashwini Malla, Khwanlada Kobtrakul, Sornkanok Vimolmangkang
Summary: Formation of oxidative stress in dermal fibroblasts is crucial for skin aging, and using phytochemicals to enhance the cells' ability to combat oxidative stress is a promising strategy to prevent skin aging. Callus culture of Centella asiatica produces unique antioxidant compounds that exhibit anti-skin-aging activities, including upregulation of cellular antioxidant enzymes and inhibition of matrix metalloprotease-9 induction. This highlights the potential of C. asiatica callus extract as an effective anti-skin-aging agent in cosmeceutical preparations.
SCIENTIFIC REPORTS
(2021)
Article
Gastroenterology & Hepatology
Gangarao Davuluri, Nicole Welch, Jinendiran Sekar, Mahesha Gangadhariah, Khaled Alsabbagh Alchirazi, Maradumane L. Mohan, Avinash Kumar, Sashi Kant, Samjhana Thapaliya, McKenzie Stine, Megan R. McMullen, Rebecca L. McCullough, George R. Stark, Laura E. Nagy, Sathyamangla V. Naga Prasad, Srinivasan Dasarathy
Summary: Despite the high clinical significance of sarcopenia in alcohol-associated cirrhosis, the mechanisms of ethanol-induced impaired protein homeostasis are poorly understood. This study identified PP2A as a key mediator in ethanol-induced dysregulation of protein balance, suggesting potential therapeutic approaches targeting the PI3K gamma-PP2A axis.
Article
Biochemistry & Molecular Biology
Debbie S. Retnoningrum, Hiromi Yoshida, Ismiana Pajatiwi, Rahmat Muliadi, Ratna A. Utami, Anita Artarini, Wangsa T. Ismaya
Summary: The manganese superoxide dismutase from Staphylococcus equorum (MnSODSeq) has shown robust activity under various conditions. Strengthening the interactions between the monomers is crucial for improving the enzyme stability. A new strategy using K38R-A121E/Y double substitutions has been proposed, resulting in mutants with similar enzyme activity and enhanced thermal stability. The structure of the L169W mutant was also elucidated, revealing the impact of intramolecular modification on enzyme stability.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2023)
Article
Pharmacology & Pharmacy
Anand Ramalingam, Norsyahida Mohd Fauzi, Siti Balkis Budin, Satirah Zainalabidin
Summary: This study found that prolonged nicotine administration increases myocardial susceptibility to I/R injury in rats, which is associated with increased mitochondrial permeability transition driven by ROS.
BASIC & CLINICAL PHARMACOLOGY & TOXICOLOGY
(2021)
Article
Oncology
Merce Juliachs, Mireia Pujals, Chiara Bellio, Nathalie Meo-Evoli, Juan M. Duran, Esther Zamora, Mireia Pares, Anna Sunol, Olga Mendez, Alex Sanchez-Pla, Francesc Canals, Cristina Saura, Josep Villanueva
Summary: This study aims to find circulating biomarkers for monitoring the response to cancer therapy. The research found that the release of SOD2 protein during chemotherapy treatment is associated with tumor cell death, and the increase in its circulating levels correlates with treatment response, which can be used for non-invasive monitoring of breast cancer patients.
Article
Biochemistry & Molecular Biology
Shylesh Bhaskaran, Gaurav Kumar, Nidheesh Thadathil, Katarzyna M. Piekarz, Sabira Mohammed, Sergio Dominguez Lopez, Rizwan Qaisar, Dorothy Walton, Jacob L. Brown, Ashley Murphy, Nataliya Smith, Debra Saunders, Michael J. Beckstead, Scott Plafker, Tommy L. Lewis, Rheal Towner, Sathyaseelan S. Deepa, Arlan Richardson, Robert C. Axtellb, Holly Van Remmen
Summary: This study investigates the effects of elevated oxidative stress induced in the mouse spinal cord through the deletion of Mn-Superoxide dismutase (MnSOD). The results show that the deletion of Sod2 in spinal cord neurons leads to mitochondrial alterations and peroxide generation. This phenotype is characterized by demyelination, inflammation, and progressive paralysis that mimic the symptoms of progressive multiple sclerosis.
Article
Biochemistry & Molecular Biology
Lara Rouco, Rebeca Alvarino, Amparo Alfonso, Maria J. Romero, Rosa Pedrido, Marcelino Maneiro
Summary: This study investigates the antioxidant properties of four manganese(II) complexes with fluorescent dyes and their protective effects on SH-SY5Y neuroblastoma cells. The complexes showed significant antioxidant activity and improved cell survival by reducing reactive oxygen species release. The incorporation of the fluorescent label allowed the study of their cellular uptake in the neuroblastoma cells.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Immunology
Hangeun Kim, Hyeoung-Eun Kim, Dae Kyun Chung, Kyoung Ok Jang
Summary: Lipoteichoic acid (aLTA) from Staphylococcus aureus regulates cytokine production through multiple signaling pathways, with MnSOD playing a crucial role in this regulation.
JOURNAL OF MICROBIOLOGY IMMUNOLOGY AND INFECTION
(2022)
Article
Medicine, General & Internal
Teresa Cunha-Oliveira, Daniela Franco Silva, Luis Segura, Ines Baldeiras, Ricardo Marques, Tatiana Rosenstock, Paulo J. Oliveira, Filomena S. G. Silva
Summary: Distinct redox signatures were found in lymphoblasts from mutSOD1, undSOD1, and healthy controls, which can serve as therapeutic targets for ALS drug development. High heterogeneity in redox profiles between cohorts was observed, but clustering analysis successfully segregated healthy controls from ALS samples based on specific parameters. These findings provide valuable insights for understanding oxidative stress profiles in different forms of ALS and potential treatment strategies.
EUROPEAN JOURNAL OF CLINICAL INVESTIGATION
(2022)
Article
Nutrition & Dietetics
Malgorzata M. Brzoska, Malgorzata Galazyn-Sidorczuk, Magdalena Kozlowska, Nazar M. Smereczanski
Summary: The study found that the extract from Aronia melanocarpa L. berries can protect the body's manganese status and improve the antioxidant capacity of cells under exposure to cadmium. These findings confirm the protective impact of aronia berries against cadmium toxicity.