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Millán-Pacheco C, Serratos IN, del Rosario Sánchez González S, Galano A. Newly designed melatonin analogues with potential neuroprotective effects. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02907-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Reddy Addi U, Jakhotia S, Reddy SS, Reddy GB. Advanced glycation end products in brain during aging. Chem Biol Interact 2022; 355:109840. [PMID: 35104490 DOI: 10.1016/j.cbi.2022.109840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 01/18/2022] [Accepted: 01/27/2022] [Indexed: 11/03/2022]
Abstract
Aging is a main risk factor for many diseases including neurodegenerative disorders. Numerous theories and mechanisms including accumulation of advanced glycation end products (AGEs) have been put forward in explaining brain aging. However, a focused study on the status of AGEs in the brain during progressive aging in connection with interrelated cellular processes like ubiquitin-proteasome system (UPS), unfolded protein response, autophagy-lysosome system and apoptosis is lacking. Hence, in this study, we investigated the levels of AGEs in the brain of 5-, 10-, 15- and 20-months old WNIN rats. Endoplasmic reticulum (ER) stress response, UPS components, autophagy flux, neurotrophic and presynaptic markers along with cell death markers were analyzed by immunoblotting. The neuronal architecture was analyzed by H&E and Nissl staining. The results demonstrated progressive accumulation of AGEs in the brain during aging. Adaptive ER stress response was observed by 10-months while maladaptive ER stress response was seen at 15- and 20-months of age along with impaired UPS and autophagy, and perturbations in neuronal growth factors. All these disturbances intensify with age to further exaggerate cell death mechanisms. There was a shrinkage of the cell size with aging and Congo-red staining revealed β-amyloid accumulation in higher ages. Together these results suggest that progressive accumulation of AGEs with aging in the brain may lead to neuronal damage by affecting ER homeostasis, UPS, autophagic flux, and neuronal growth factors.
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Affiliation(s)
- Utkarsh Reddy Addi
- Biochemistry Division, ICMR-National Institute of Nutrition, Hyderabad, India
| | - Sneha Jakhotia
- Biochemistry Division, ICMR-National Institute of Nutrition, Hyderabad, India
| | - S Sreenivasa Reddy
- Biochemistry Division, ICMR-National Institute of Nutrition, Hyderabad, India.
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Modeling integrin and plasma-polymerized pyrrole interactions: chemical diversity relevance for cell regeneration. Sci Rep 2019; 9:7009. [PMID: 31065077 PMCID: PMC6504955 DOI: 10.1038/s41598-019-43286-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 04/17/2019] [Indexed: 01/15/2023] Open
Abstract
Protein-engineered biomaterials represent a powerful approach to increase biofunctional activity like tissue repair and celular proliferation. Among these materials, integrins and the development of their specific interactions with plasma-polymerized pyrrole (PPPy) are promising biomaterial for tissue regeneration. In this paper, we studied the molecular recognition in the active site of three integrins (α5β1, αvβ3 and αIIbβ3) with PPPy using the structure proposed by Kumar et al. PPPy molecule has three sites to incorporate different species, we worked mainly with the functional groups, –NH2 and –OH groups according to our IR spectroscopic results. We carried out docking studies to find the better conformational couplings and to determine electrostatic (ΔGelec) and non-electrostatic (ΔGnon-elec) contributions to the binding free energy (ΔGb) of these complexes we used Adaptive Poisson-Bolztmann program (APBS). Our results indicated that when incorporating -1H-azirine, -NH2 or –OH group in PPPy structure, interactions with integrins were favorable, as indicated by correspondent ΔGb values. These interactions were mainly triggered by Coulomb interactions, an important term in the electrostatic component. Furthermore, our studies suggest that some residues of integrins α5β1, αvβ3 and αIIbβ3 like aspartates are important for the binding to PPPy structures. Detailed interactions between integrin α5β1 and PPPy structures were revealed by molecular dynamics simulations. We used this particular integrin structure because of its favorable ΔGb as well as its major cellular receptor for the extracellular matrix protein fibronectin. Clustering analysis allowed us to carry out focused docking studies and to determine the time evolution of the ΔGb values. By incorporating -NH2 into PPPy structure, ΔGb values were very favorable during the course of the dynamics simulations by the establishment of hydrogen bonds with Asn224 and/orAsp227 residues, which are part of the integrin α5β1 pocket. However, for the integrin α5β1-PPPy-1H-azirine complex and the rest of the functional groups, the ΔGb values were less favorable, although PPPy was found at a distance of less than 5 Å from the active site residues. This work is complementary to the previous studies made employing PPPy nanoparticles for a variety of tissue engineering applications, and were done to enlighten the role played by the amino group of the PPPy in its integrin recognition process.
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Chaudhuri J, Bains Y, Guha S, Kahn A, Hall D, Bose N, Gugliucci A, Kapahi P. The Role of Advanced Glycation End Products in Aging and Metabolic Diseases: Bridging Association and Causality. Cell Metab 2018; 28:337-352. [PMID: 30184484 PMCID: PMC6355252 DOI: 10.1016/j.cmet.2018.08.014] [Citation(s) in RCA: 353] [Impact Index Per Article: 58.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Accumulation of advanced glycation end products (AGEs) on nucleotides, lipids, and peptides/proteins are an inevitable component of the aging process in all eukaryotic organisms, including humans. To date, a substantial body of evidence shows that AGEs and their functionally compromised adducts are linked to and perhaps responsible for changes seen during aging and for the development of many age-related morbidities. However, much remains to be learned about the biology of AGE formation, causal nature of these associations, and whether new interventions might be developed that will prevent or reduce the negative impact of AGEs-related damage. To facilitate achieving these latter ends, we show how invertebrate models, notably Drosophila melanogaster and Caenorhabditis elegans, can be used to explore AGE-related pathways in depth and to identify and assess drugs that will mitigate against the detrimental effects of AGE-adduct development.
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Affiliation(s)
- Jyotiska Chaudhuri
- The Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA.
| | - Yasmin Bains
- Touro University College of Osteopathic Medicine, Glycation Oxidation and Research laboratory, Vallejo, CA, 94592, USA
| | - Sanjib Guha
- The Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA
| | - Arnold Kahn
- The Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA; University of California, Department of Urology, 400 Parnassus Avenue, San Francisco, CA 94143, USA
| | - David Hall
- The Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA
| | - Neelanjan Bose
- The Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA; University of California, Department of Urology, 400 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Alejandro Gugliucci
- Touro University College of Osteopathic Medicine, Glycation Oxidation and Research laboratory, Vallejo, CA, 94592, USA.
| | - Pankaj Kapahi
- The Buck Institute for Research on Aging, 8001 Redwood Boulevard, Novato, CA 94945, USA; University of California, Department of Urology, 400 Parnassus Avenue, San Francisco, CA 94143, USA.
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Colonnello A, Kotlar I, de Lima ME, Ortíz-Plata A, García-Contreras R, Soares FAA, Aschner M, Santamaría A. Comparing the Effects of Ferulic Acid and Sugarcane Aqueous Extract in In Vitro and In Vivo Neurotoxic Models. Neurotox Res 2018; 34:640-648. [DOI: 10.1007/s12640-018-9926-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/06/2018] [Accepted: 06/07/2018] [Indexed: 02/07/2023]
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Pinkas A, Lee KH, Chen P, Aschner M. A C. elegans Model for the Study of RAGE-Related Neurodegeneration. Neurotox Res 2018; 35:19-28. [PMID: 29869225 DOI: 10.1007/s12640-018-9918-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/23/2018] [Accepted: 05/25/2018] [Indexed: 01/15/2023]
Abstract
The receptor for advanced glycation products (RAGE) is a cell surface, multi-ligand receptor belonging to the immunoglobulin superfamily; this receptor is implicated in a variety of maladies, via inflammatory pathways and induction of oxidative stress. Currently, RAGE is being studied using a limited number of mammalian in vivo, and some complementary in vitro, models. Here, we present a Caenorhabditis elegans model for the study of RAGE-related pathology: a transgenic strain, expressing RAGE in all neurons, was generated and subsequently tested behaviorally, developmentally, and morphologically. In addition to RAGE expression being associated with a significantly shorter lifespan, the following behavioral observations were made when RAGE-expressing worms were compared to the wild type: RAGE-expressing worms showed an impaired dopaminergic system, evaluated by measuring the fluorescent signal of GFP tagging; these worms exhibited decreased locomotion-both general and following ethanol exposure-as measured by counting body bends in adult worms; RAGE expression was also associated with impaired recovery of quiescence and pharyngeal pumping secondary to heat shock, as a significantly smaller fraction of RAGE-expressing worms engaged in these behaviors in the 2 h immediately following the heat shock. Finally, significant developmental differences were also found between the two strains: RAGE expression leads to a significantly smaller fraction of hatched eggs 24 h after laying and also to a significantly slower developmental speed overall. As evidence for the role of RAGE in a variety of neuropathologies accumulates, the use of this novel and expedient model should facilitate the elucidation of relevant underlying mechanisms and also the development of efficient therapeutic strategies.
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Affiliation(s)
- Adi Pinkas
- Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, 1300 Morris Park Avenue, Forchheimer Building, Room 209, Bronx, NY, 10461, USA.
| | - Kun He Lee
- Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, 1300 Morris Park Avenue, Forchheimer Building, Room 209, Bronx, NY, 10461, USA
| | - Pan Chen
- Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, 1300 Morris Park Avenue, Forchheimer Building, Room 209, Bronx, NY, 10461, USA
| | - Michael Aschner
- Albert Einstein College of Medicine, Jack and Pearl Resnick Campus, 1300 Morris Park Avenue, Forchheimer Building, Room 209, Bronx, NY, 10461, USA
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