We previously reported that Tat-Cu,Zn-superoxide dismutase (Tat-SOD) can be directly transduced into mammalian cells across the lipid membrane barrier. To enhance the therapeutic potential of Tat-SOD for the treatment of various disorders that are related to this antioxidant enzyme, the transduction efficacy of Tat-SOD should be heightened. Therefore, we investigated whether copper ion recovery of the fusion protein could enhance the transduction potential of Tat-SOD in cultured HeLa cells. The results showed that the transduction potential of Tat-SOD was markedly enhanced by copper ions, and moderately increased by zinc ions. Compared with Tat-SOD, the Tat-SOD that recovered the copper ion (CR-Tat-SOD) achieved a significant increase in intracellular concentration and enzymatic activity. Therefore, CR-Tat-SOD was transduced into HeLa cells in a rapid saturation manner, but Tat-SOD was shown in a time-dependent manner. With the higher transduction efficacy of CR-Tat-SOD than that of Tat-SOD, the transduced CR-Tat-SOD significantly increased the viability of HeLa cells that were pretreated with paraquat, an intracellular superoxide anion generator. Although the mechanism of the enhanced transduction of Tat-SOD by copper ions is still unanswered, these results indicate that copper ions facilitate the transduction of SOD. These then significantly increase the biological effectiveness of this antioxidant enzyme.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Edaravone is a Therapeutic Candidate for Doxorubicin-Induced Cardiomyopathy by Activating the Nrf2 Pathway.
Pharmacol Res Perspect
February 2025
Department of Pharmaceutical Health Care and Sciences, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan.
Doxorubicin (DOXO) has long been used clinically and remains a key drug in cancer therapy. DOXO-induced cardiomyopathy (DICM) is a chronic and fatal complication that severely limits the use of DOXO. However, there are very few therapeutic agents for DICM, and there is an urgent need to identify those that can be used for a larger number of patients.
View Article and Find Full Text PDFInducing resistance of postharvest fruits and vegetables through acibenzolar-S-methyl application: A review of implications and mechanisms.
Plant Physiol Biochem
January 2025
College of Food Science and Engineering, Bohai University, 121013, Jinzhou, PR China; National & Local Joint Engineering Research Center of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, 121013, Jinzhou, PR China. Electronic address:
Significant losses of vegetables and fruits occur at multiple stages, including harvest, sorting, storage, and transportation, primarily due to mechanical damage, pathogen invasion, and the natural process of senescence. To mitigate postharvest decay and maintain superior quality of produce, conventional techniques such as low temperature storage and synthetic fungicide treatment are widely employed. Acibenzolar-S-methyl (ASM), an effective plant resistance inducers, has demonstrated its efficacy in protecting against a diverse range of fungal and bacterial pathogens.
View Article and Find Full Text PDFAttributes novel drug candidate: Constitutive GPCR signal bias mediated by purinergic receptors.
Pharmacol Ther
January 2025
School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China; School of Life Science and Technology, China Pharmaceutical University, Nanjing 211198, China.
G protein-coupled receptors (GPCRs) can transmit signals via G protein-dependent or independent pathways due to the conformational changes of receptors and ligands, which is called biased signaling. This concept posits that ligands can selectively activate a specific signaling pathway after receptor activation, facilitating downstream signaling along a preferred pathway. Biased agonism enables the development of ligands that prioritize therapeutic signaling pathways while mitigating on-target undesired effects.
View Article and Find Full Text PDFIntegrated metabolomics and mass spectrometry imaging analysis reveal the efficacy and mechanism of Huangkui capsule on type 2 diabetic nephropathy.
Phytomedicine
January 2025
State key laboratory of Integration and Innovation of Classic Formula and Modern Chinese Medicine, National Chinmedomics Research Center, National TCM Key Laboratory of Serum Pharmacochemistry, Metabolomics Laboratory, Department of Pharmaceutical Analysis, Heilongjiang University of Chinese Medicine, Heping Road 24, Harbin 150040, China; Department of Nephrology, Nephrology Institute of the Chinese People's Liberation Army, National Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China. Electronic address:
Background: Huangkui capsule (HKC), a Chinese patent medicine, is clinically used for treating diabetic nephropathy. However, the core disease-specific biomarkers and targets of type 2 diabetic nephropathy (T2DN) and the therapeutic mechanism of HKC are not fully elucidated.
Purpose: This study aimed to investigate the therapeutic effects and underlying molecular mechanisms of HKC for T2DN.
A novel strategy for the protective effect of ginsenoside Rg1 against ovarian reserve decline by the PINK1 pathway.
Pharm Biol
December 2025
The Affiliated Hospital, Changchun University of Chinese Medicine, Changchun, China.
Context: The decline in ovarian reserve is a major concern in female reproductive health, often associated with oxidative stress and mitochondrial dysfunction. Although ginsenoside Rg1 is known to modulate mitophagy, its effectiveness in mitigating ovarian reserve decline remains unclear.
Objective: To investigate the role of ginsenoside Rg1 in promoting mitophagy to preserve ovarian reserve.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!