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Li X, Li Y, Xu J, Lu X, Ma S, Sun L, Chang C, Min L, Fan C. Terahertz Wave Desensitizes Ferroptosis by Inhibiting the Binding of Ferric Ions to the Transferrin. ACS NANO 2025; 19:6876-6889. [PMID: 39752147 DOI: 10.1021/acsnano.4c13075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2025]
Abstract
Ferroptosis is a classic type of programmed cell death characterized by iron dependence, which is closely associated with many diseases such as cancer, intestinal ischemic diseases, and nervous system diseases. Transferrin (Tf) is responsible for ferric-ion delivery owing to its natural Fe3+ binding ability and plays a crucial role in ferroptosis. However, Tf is not considered as a classic druggable target for ferroptosis-associated diseases since systemic perturbation of Tf would dramatically disrupt blood iron homeostasis. Here, we reported a nonpharmaceutical, noninvasive, and Tf-targeted electromagnetic intervention technique capable of desensitizing ferroptosis with directivity. First, we revealed that the THz radiation had the ability to significantly decrease binding affinity between the Fe3+ and Tf via molecular dynamics simulations, and the modulation was strongly wavelength-dependent. This result provides theoretical feasibility for the THz modulation-based ferroptosis intervention. Subsequent extracellular and cellular chromogenic activity assays indicated that the THz field at 8.7 μm (i.e., 34.5 THz) inhibited the most Fe3+ bound to the Tf, and the wavelength was in good agreement with the simulated one. Then, functional assays demonstrated that levels of intracellular Fe2+, lipid peroxidation, malondialdehyde (MDA) and cell death were all significantly reduced in cells treated with this 34.5 THz wave. Furthermore, the iron deposition, lipid peroxidation, and MDA in the ferroptosis disease model induced by ischemia-reperfusion injury could be nearly eliminated by the same radiation, validating THz wave-induced desensitization of ferroptosis in vivo. Together, this work provides a preclinical exemplar for electromagnetic irradiation-stimulated desensitization of ferroptosis and predicts an innovative, THz wave-based therapeutic method for ferroptosis-associated diseases in the future.
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Affiliation(s)
- Xiangji Li
- Department of Gastroenterology, State Key Laboratory of Digestive Health, National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P. R. China
| | - Yangmei Li
- Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, P. R. China
| | - Junxuan Xu
- Department of Gastroenterology, State Key Laboratory of Digestive Health, National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P. R. China
| | - Xinlian Lu
- National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing 100094, P. R. China
| | - Shixiang Ma
- Department of Retroperitoneal Tumor Surgery, Peking University International Hospital, Beijing 102206, P. R. China
| | - Lan Sun
- Institute of Basic Research in Clinical Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, P. R. China
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing 100700, P. R. China
| | - Chao Chang
- Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, P. R. China
- School of Physics, Peking University, Beijing 100871, P. R. China
| | - Li Min
- Department of Gastroenterology, State Key Laboratory of Digestive Health, National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, P. R. China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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Kumar P, Dumpala RMR, Telmore VM, Sadhu B, Sundararajan M, Yadav AK, Bhattacharyya D, George JP. Thorium Complexation with Aliphatic and Aromatic Hydroxycarboxylates: A Combined Experimental and Theoretical Study. ACS OMEGA 2024; 9:27289-27299. [PMID: 38947836 PMCID: PMC11209906 DOI: 10.1021/acsomega.4c01581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 05/31/2024] [Accepted: 06/05/2024] [Indexed: 07/02/2024]
Abstract
Hydroxycarboxylic acids, viz., α-hydroxyisobutyric acid (HIBA) and mandelic acid (MA), have been widely employed as eluents for inner transition metal separation studies. Both extractants have identical functional groups (OH and COOH) with different side-chains. Despite their similarities in binding motifs, they show different retention behaviors for thorium and uranium in liquid chromatography. To understand the mechanism behind the trend, a detailed study on the aqueous phase interaction of thorium with both extractants is carried out by speciation, spectroscopy, and density functional theory-based calculations. Potentiometric titration experiments are carried out to reveal the stability and species formed. Electrospray ionization mass spectrometry is performed to identify the formation of different species by Th with both HIBA and MA. It is seen that for Th-HIBA and Th-MA, the dominating species are ML3 and ML4, respectively. A similar pattern observed in potentiometric speciation analysis supports the tendency of Th to form higher stoichiometric species with MA than with HIBA. The difference in the dominating species thus helps in explaining the reversal in the retention behavior of uranium and thorium in the reverse-phase liquid chromatographic separation. The results obtained are corroborated with extended X-ray absorption fine structure spectroscopic measurements and density functional theory (DFT) calculations.
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Affiliation(s)
- Pranaw Kumar
- Fuel
Chemistry Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
| | - Rama Mohana Rao Dumpala
- Radiochemistry
Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Institute
for Nuclear Waste Disposal, Karlsruhe Institute
of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Vijay M. Telmore
- Fuel
Chemistry Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
| | - Biswajit Sadhu
- Health
Physics Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
| | - Mahesh Sundararajan
- Theoretical
Chemistry Section, Chemistry Division, Bhabha
Atomic Research Centre, Mumbai 400085, India
- Homi
Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Ashok K. Yadav
- Atomic
&
Molecular Physics Division, Bhabha Atomic
Research Centre, Mumbai 400085, India
| | - D. Bhattacharyya
- Atomic
&
Molecular Physics Division, Bhabha Atomic
Research Centre, Mumbai 400085, India
| | - Jaison P. George
- Fuel
Chemistry Division, Bhabha Atomic Research
Centre, Mumbai 400085, India
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Mishra V, Pathak AK, Bandyopadhyay T. Binding of human serum albumin with uranyl ion at various pH: an all atom molecular dynamics study. J Biomol Struct Dyn 2023; 41:7318-7328. [PMID: 36099177 DOI: 10.1080/07391102.2022.2120080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 08/26/2022] [Indexed: 10/14/2022]
Abstract
Uranium is routinely handled in various stages of nuclear fuel cycle and its association with human serum albumin (HSA) has been reported in literature, however, their binding characteristics still remains obscure. The present study aims to understand interaction of uranium with HSA by employing all atom molecular dynamics simulation of the HSA-metal ion complex. His67, His247 and Asp249 residues constitute the major binding site of HSA, which capture the uranyl ion (UO22+). A total of six sets of initial coordinates are used for Zn2+-HSA and UO22+-HSA system at pH = 4, 7.4 and 9, respectively. Enhance sampling method, namely, well-tempered meta-dynamics (WT-MtD) is employed to study the binding and un-binding processes of UO22+ and Zn2+ ions. Potential of mean force (PMF) profiles are generated for all the six sets of complexes from the converged WT-MtD run. Various basins and barriers are observed along the (un)binding pathways. Hydrogen bond dynamics and short-range Coulomb interactions are evaluated from the equilibrium run at each basins and barriers for both the ions at all pH values. The binding of UO22+ ion with HSA is the result of the dynamical balance between UO22+-HSA and UO22+-water short range Coulomb interactions. Zn2+ ion interact more strongly than UO22+ at all pH through short range Coulomb interactions. PMF values further concludes that UO22+ cannot associate to the Zn2+ bound HSA protein but can be captured by free HSA at all pH values i.e. endosomal, alkaline and physiological pH.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Vijayakriti Mishra
- Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
| | - Arup Kumar Pathak
- Homi Bhabha National Institute, Mumbai, India
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Tusar Bandyopadhyay
- Homi Bhabha National Institute, Mumbai, India
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, India
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Kumar R, Sharma D, Kumar N, Kumari B, Kumar S, Kumar R. Substitution of carbonate by non-physiological synergistic anion modulates the stability and iron release kinetics of serum transferrin. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2023; 1871:140856. [PMID: 36252939 DOI: 10.1016/j.bbapap.2022.140856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/26/2022] [Accepted: 10/04/2022] [Indexed: 11/06/2022]
Abstract
Serum transferrin (sTf) is a bi-lobal protein. Each lobe of sTf binds one Fe3+ ion in the presence of a synergistic anion. Physiologically, carbonate is the main synergistic anion but other anions such as oxalate, malonate, glycolate, maleate, glycine, etc. can substitute for carbonate in vitro. The present work provides the possible pathways by which the substitution of carbonate with oxalate affects the structural, kinetic, thermodynamic, and functional properties of blood plasma sTf. Analysis of equilibrium experiments measuring iron release and structural unfolding of carbonate and oxalate bound diferric-sTf (Fe2sTf) as a function of pH, urea concentration, and temperature reveal that the structural and iron-centers stability of Fe2sTf increase by substitution of carbonate with oxalate. Analysis of isothermal titration calorimetry (ITC) scans showed that the affinity of Fe3+ with apo-sTf is enhanced by substituting carbonate with oxalate. Analysis of kinetic and thermodynamic parameters measured for the iron release from the carbonate and oxalate bound monoferric-N-lobe of sTf (FeNsTf) and Fe2sTf at pH 7.4 and pH 5.6 reveals that the substitution of carbonate with oxalate inhibits/retards the iron release via increasing the enthalpic barriers.
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Affiliation(s)
- Rajesh Kumar
- School of Chemistry and Biochemistry, Thapar University, Patiala 147004, India
| | - Deepak Sharma
- Council of Scientific and Industrial Research-Institute of Microbial Technology, Sector 39A, Chandigarh, India
| | - Navinder Kumar
- Council of Scientific and Industrial Research-Institute of Microbial Technology, Sector 39A, Chandigarh, India
| | - Beeta Kumari
- Deparment of Chemistry, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda 151401, India
| | - Sanjeev Kumar
- Deparment of Chemistry, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda 151401, India
| | - Rajesh Kumar
- Deparment of Chemistry, School of Basic Sciences, Central University of Punjab, Ghudda, Bathinda 151401, India; School of Chemistry and Biochemistry, Thapar University, Patiala 147004, India.
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