201
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Wong DCS, Seinkmane E, Zeng A, Stangherlin A, Rzechorzek NM, Beale AD, Day J, Reed M, Peak‐Chew SY, Styles CT, Edgar RS, Putker M, O’Neill JS. CRYPTOCHROMES promote daily protein homeostasis. EMBO J 2022; 41:e108883. [PMID: 34842284 PMCID: PMC8724739 DOI: 10.15252/embj.2021108883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 11/07/2021] [Accepted: 11/09/2021] [Indexed: 11/29/2022] Open
Abstract
The daily organisation of most mammalian cellular functions is attributed to circadian regulation of clock-controlled protein expression, driven by daily cycles of CRYPTOCHROME-dependent transcriptional feedback repression. To test this, we used quantitative mass spectrometry to compare wild-type and CRY-deficient fibroblasts under constant conditions. In CRY-deficient cells, we found that temporal variation in protein, phosphopeptide, and K+ abundance was at least as great as wild-type controls. Most strikingly, the extent of temporal variation within either genotype was much smaller than overall differences in proteome composition between WT and CRY-deficient cells. This proteome imbalance in CRY-deficient cells and tissues was associated with increased susceptibility to proteotoxic stress, which impairs circadian robustness, and may contribute to the wide-ranging phenotypes of CRY-deficient mice. Rather than generating large-scale daily variation in proteome composition, we suggest it is plausible that the various transcriptional and post-translational functions of CRY proteins ultimately act to maintain protein and osmotic homeostasis against daily perturbation.
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Affiliation(s)
| | | | - Aiwei Zeng
- MRC Laboratory of Molecular BiologyCambridgeUK
| | | | | | | | - Jason Day
- Department of Earth SciencesUniversity of CambridgeCambridgeUK
| | - Martin Reed
- MRC Laboratory of Molecular BiologyCambridgeUK
| | | | | | - Rachel S Edgar
- Department of Infectious DiseasesImperial CollegeLondonUK
| | - Marrit Putker
- MRC Laboratory of Molecular BiologyCambridgeUK
- Present address:
Crown BioscienceUtrechtthe Netherlands
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202
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Zhang S, Hong Y. Measuring Cysteine Exposure in Unfolded Proteins with Tetraphenylethene Maleimide and its Analogs. Methods Mol Biol 2022; 2378:3-18. [PMID: 34985690 DOI: 10.1007/978-1-0716-1732-8_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
When proteostasis is challenged and becomes unbalanced, unfolded proteins can accumulate in the cells. Protein unfolding causes conformational changes and subsequent differentials in side-chain solvent accessibility and reactivity. In particular, when protein unfolds, non-disulfide-bonded cysteines that are usually buried in the native state can become surface exposed and thus accessible. A series of fluorogenic dyes including tetraphenylethene maleimide (TPE-MI) and its analogs were developed to capture cysteine exposure in unfolded proteins as a measure of unfolded protein load and proteostasis capacity in cells. These dyes are inherently non-fluorescent but show fluorescence turn-on effect when conjugated to unfolded proteins via reacting with exposed cysteines on the protein. Reacting with small biothiols such as glutathione does not induce fluorescence of these dyes. Here we describe the routine workflow to characterize unfolded proteins in vitro or unfolded proteomes in cells by TPE-MIs.
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Affiliation(s)
- Shouxiang Zhang
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Yuning Hong
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia.
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203
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Batnasan E, Koivukoski S, Kärkkäinen M, Latonen L. Nuclear Organization in Response to Stress: A Special Focus on Nucleoli. Results Probl Cell Differ 2022; 70:469-494. [PMID: 36348119 DOI: 10.1007/978-3-031-06573-6_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In this chapter, we discuss the nuclear organization and how it responds to different types of stress. A key component in these responses is molecular traffic between the different sub-nucleolar compartments, such as nucleoplasm, chromatin, nucleoli, and various speckle and body compartments. This allows specific repair and response activities in locations where they normally are not active and serve to halt sensitive functions until the stress insult passes and inflicted damage has been repaired. We focus on mammalian cells and their nuclear organization, especially describing the central role of the nucleolus in nuclear stress responses. We describe events after multiple stress types, including DNA damage, various drugs, and toxic compounds, and discuss the involvement of macromolecular traffic between dynamic, phase-separated nuclear organelles and foci. We delineate the key proteins and non-coding RNA in the formation of stress-responsive, non-membranous nuclear organelles, many of which are relevant to the formation of and utilization in cancer treatment.
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Affiliation(s)
- Enkhzaya Batnasan
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Sonja Koivukoski
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Minttu Kärkkäinen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Leena Latonen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland.
- Foundation for the Finnish Cancer Institute, Helsinki, Finland.
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204
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TDP-43 pathology: from noxious assembly to therapeutic removal. Prog Neurobiol 2022; 211:102229. [DOI: 10.1016/j.pneurobio.2022.102229] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 12/08/2021] [Accepted: 01/26/2022] [Indexed: 02/08/2023]
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205
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APP deficiency and HTRA2 modulates PrPc proteostasis in human cancer cells. BBA ADVANCES 2022; 2:100035. [PMID: 37082595 PMCID: PMC10074928 DOI: 10.1016/j.bbadva.2021.100035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 12/09/2021] [Accepted: 12/14/2021] [Indexed: 11/23/2022] Open
Abstract
Cellular protein homeostasis (proteostasis) requires an accurate balance between protein biosynthesis, folding, and degradation, and its instability is causally related to human diseases and cancers. Here, we created numerous engineered cancer cell lines targeting APP (amyloid ß precursor protein) and/or PRNP (cellular prion) genes and we showed that APP knocking-down impaired PRNP mRNA level and vice versa, suggesting a link between their gene regulation. PRNPKD, APPKD and PRNPKD/APPKD HeLa cells encountered major difficulties to grow in a 3D tissue-like environment. Unexpectedly, we found a cytoplasmic accumulation of the PrPc protein without PRNP gene up regulation, in both APPKD and APPKO HeLa cells. Interestingly, APP and/or PRNP gene ablation enhanced the chaperone/serine protease HTRA2 gene expression, which is a protein processing quality factor involved in Alzheimer's disease. Importantly, HTRA2 gene silencing decreased PRNP mRNA level and lowered PrPc protein amounts, and conversely, HTRA2 overexpression increased PRNP gene regulation and enhanced membrane-anchored and cytoplasmic PrPc fractions. PrPc, APP and HTRA2 destabilized membrane-associated CD24 protein, suggesting changes in the lipid raft structure. Our data show for the first time that APP and the dual chaperone/serine protease HTRA2 protein could modulate PrPc proteostasis hampering cancer cell behavior.
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206
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Santiago-Lopez AJ, Berglund K, Gross RE, Gutekunst CAN. Kinetic monitoring of neuronal stress response to proteostasis dysfunction. Mol Cell Neurosci 2022; 118:103682. [PMID: 34800621 PMCID: PMC8770608 DOI: 10.1016/j.mcn.2021.103682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 11/04/2021] [Accepted: 11/06/2021] [Indexed: 01/03/2023] Open
Abstract
Proteostasis dysfunction and activation of the unfolded protein response (UPR) are characteristic of all major neurodegenerative diseases. Nevertheless, although the UPR and proteostasis dysfunction has been studied in great detail in model organisms like yeast and mammalian cell lines, it has not yet been examined in neurons. In this study, we applied a viral vector-mediated expression of a reporter protein based on a UPR transcription factor, ATF4, and time-lapse fluorescent microscopy to elucidate how mouse primary neurons respond to pharmacological and genetic perturbations to neuronal proteostasis. In in vitro models of endoplasmic reticulum (ER) stress and proteasome inhibition, we used the ATF4 reporter to reveal the time course of the neuronal stress response relative to neurite degeneration and asynchronous cell death. We showed how potential neurodegenerative disease co-factors, ER stress and mutant α-synuclein overexpression, impacted neuronal stress response and overall cellular health. This work therefore introduces a viral vector-based reporter that yields a quantifiable readout suitable for non-cell destructive kinetic monitoring of proteostasis dysfunction in neurons by harnessing ATF4 signaling as part of the UPR activation.
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Affiliation(s)
- Angel J Santiago-Lopez
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, United States of America; Interdisciplinary Bioengineering Graduate Program, Georgia Institute of Technology, Atlanta, GA, United States of America; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, United States of America
| | - Ken Berglund
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, United States of America
| | - Robert E Gross
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, United States of America; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States of America
| | - Claire-Anne N Gutekunst
- Department of Neurosurgery, Emory University School of Medicine, Atlanta, GA, United States of America.
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207
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Borgert L, Mishra S, den Brave F. Quality control of cytoplasmic proteins inside the nucleus. Comput Struct Biotechnol J 2022; 20:4618-4625. [PMID: 36090811 PMCID: PMC9440239 DOI: 10.1016/j.csbj.2022.08.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/13/2022] [Accepted: 08/15/2022] [Indexed: 11/03/2022] Open
Abstract
A complex network of molecular chaperones and proteolytic machinery safeguards the proteins which comprise the proteome, from the time they are synthesized on ribosomes to their destruction via proteolysis. Impaired protein quality control results in the accumulation of aberrant proteins, which may undergo unwanted spurious interactions with other proteins, thereby interfering with a broad range of cellular functions. To protect the cellular environment, such proteins are degraded or sequestered into inclusions in different subcellular compartments. Recent findings demonstrate that aberrant or mistargeted proteins from different cytoplasmic compartments are removed from their environment by transporting them into the nucleus. These proteins are degraded by the nuclear ubiquitin–proteasome system or sequestered into intra-nuclear inclusions. Here, we discuss the emerging role of the nucleus as a cellular quality compartment based on recent findings in the yeast Saccharomyces cerevisiae. We describe the current knowledge on cytoplasmic substrates of nuclear protein quality control, the mechanism of nuclear import of such proteins, as well as possible advantages and risks of nuclear sequestration of aberrant proteins.
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208
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Louka XP, Sklirou AD, Le Goff G, Lopes P, Papanagnou ED, Manola MS, Benayahu Y, Ouazzani J, Trougakos IP. Isolation of an Extract from the Soft Coral Symbiotic Microorganism Salinispora arenicola Exerting Cytoprotective and Anti-Aging Effects. Curr Issues Mol Biol 2021; 44:14-30. [PMID: 35723381 PMCID: PMC8928968 DOI: 10.3390/cimb44010002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 12/04/2021] [Accepted: 12/09/2021] [Indexed: 01/10/2023] Open
Abstract
Cells have developed a highly integrated system responsible for proteome stability, namely the proteostasis network (PN). As loss of proteostasis is a hallmark of aging and age-related diseases, the activation of PN modules can likely extend healthspan. Here, we present data on the bioactivity of an extract (SA223-S2BM) purified from the strain Salinispora arenicola TM223-S2 that was isolated from the soft coral Scleronephthya lewinsohni; this coral was collected at a depth of 65 m from the mesophotic Red Sea ecosystem EAPC (south Eilat, Israel). Treatment of human cells with SA223-S2BM activated proteostatic modules, decreased oxidative load, and conferred protection against oxidative and genotoxic stress. Furthermore, SA223-S2BM enhanced proteasome and lysosomal-cathepsins activities in Drosophila flies and exhibited skin protective effects as evidenced by effective inhibition of the skin aging-related enzymes, elastase and tyrosinase. We suggest that the SA223-S2BM extract constitutes a likely promising source for prioritizing molecules with anti-aging properties.
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Affiliation(s)
- Xanthippi P. Louka
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece; (X.P.L.); (A.D.S.); (E.-D.P.); (M.S.M.)
| | - Aimilia D. Sklirou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece; (X.P.L.); (A.D.S.); (E.-D.P.); (M.S.M.)
| | - Géraldine Le Goff
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91190 Gif-sur-Yvette, France; (G.L.G.); (P.L.); (J.O.)
| | - Philippe Lopes
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91190 Gif-sur-Yvette, France; (G.L.G.); (P.L.); (J.O.)
| | - Eleni-Dimitra Papanagnou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece; (X.P.L.); (A.D.S.); (E.-D.P.); (M.S.M.)
| | - Maria S. Manola
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece; (X.P.L.); (A.D.S.); (E.-D.P.); (M.S.M.)
| | - Yehuda Benayahu
- School of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel;
| | - Jamal Ouazzani
- CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91190 Gif-sur-Yvette, France; (G.L.G.); (P.L.); (J.O.)
| | - Ioannis P. Trougakos
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, 15784 Athens, Greece; (X.P.L.); (A.D.S.); (E.-D.P.); (M.S.M.)
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209
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Charif SE, Vassallu MF, Salvañal L, Igaz LM. Protein synthesis modulation as a therapeutic approach for amyotrophic lateral sclerosis and frontotemporal dementia. Neural Regen Res 2021; 17:1423-1430. [PMID: 34916412 PMCID: PMC8771112 DOI: 10.4103/1673-5374.330593] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Protein synthesis is essential for cells to perform life metabolic processes. Pathological alterations of protein content can lead to particular diseases. Cells have an intrinsic array of mechanisms and pathways that are activated when protein misfolding, accumulation, aggregation or mislocalization occur. Some of them (like the unfolded protein response) represent complex interactions between endoplasmic reticulum sensors and elongation factors that tend to increase expression of chaperone proteins and/or repress translation in order to restore protein homeostasis (also known as proteostasis). This is even more important in neurons, as they are very susceptible to harmful effects associated with protein overload and proteostatic mechanisms are less effective with age. Several neurodegenerative pathologies such as Alzheimer's, Parkinson's, and Huntington's diseases, amyotrophic lateral sclerosis and frontotemporal dementia exhibit a particular molecular signature of distinct, unbalanced protein overload. In amyotrophic lateral sclerosis and frontotemporal dementia, the majority of cases present intracellular inclusions of ubiquitinated transactive response DNA-binding protein of 43 kDa (TDP-43). TDP-43 is an RNA binding protein that participates in RNA metabolism, among other functions. Dysregulation of TDP-43 (e.g. aggregation and mislocalization) can dramatically affect neurons, and this has been linked to disease development. Expression of amyotrophic lateral sclerosis/frontotemporal dementia TDP-43-related mutations in cellular and animal models has been shown to recapitulate key features of the amyotrophic lateral sclerosis/frontotemporal dementia disease spectrum. These variants can be causative of degeneration onset and progression. Most neurodegenerative diseases (including amyotrophic lateral sclerosis and frontotemporal dementia) have no cure at the moment; however, modulating translation has recently emerged as an attractive approach that can be performed at several steps (i.e. regulating activation of initiation and elongation factors, inhibiting unfolded protein response activation or inducing chaperone expression and activity). This review focuses on the features of protein imbalance in neurodegenerative disorders and the relevance of developing therapeutical compounds aiming at restoring proteostasis. We strive to highlight the importance of research on drugs that, not only restore protein imbalance without compromising translational activity of cells, but are also as safe as possible for the patients.
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Affiliation(s)
- Santiago E Charif
- IFIBIO Houssay, Grupo de Neurociencia de Sistemas, Facultad de Medicina, Universidad de Buenos Aires -CONICET, Buenos Aires, Argentina
| | - M Florencia Vassallu
- IFIBIO Houssay, Grupo de Neurociencia de Sistemas, Facultad de Medicina, Universidad de Buenos Aires -CONICET, Buenos Aires, Argentina
| | - Lara Salvañal
- IFIBIO Houssay, Grupo de Neurociencia de Sistemas, Facultad de Medicina, Universidad de Buenos Aires -CONICET, Buenos Aires, Argentina
| | - Lionel M Igaz
- IFIBIO Houssay, Grupo de Neurociencia de Sistemas, Facultad de Medicina, Universidad de Buenos Aires -CONICET, Buenos Aires, Argentina
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210
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Manola MS, Gumeni S, Trougakos IP. Differential Dose- and Tissue-Dependent Effects of foxo on Aging, Metabolic and Proteostatic Pathways. Cells 2021; 10:3577. [PMID: 34944088 PMCID: PMC8700554 DOI: 10.3390/cells10123577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/09/2021] [Accepted: 12/11/2021] [Indexed: 02/07/2023] Open
Abstract
Aging is the gradual deterioration of physiological functions that culminates in death. Several studies across a wide range of model organisms have revealed the involvement of FOXO (forkhead box, class O) transcription factors in orchestrating metabolic homeostasis, as well as in regulating longevity. To study possible dose- or tissue-dependent effects of sustained foxo overexpression, we utilized two different Drosophila transgenic lines expressing high and relatively low foxo levels and overexpressed foxo, either ubiquitously or in a tissue-specific manner. We found that ubiquitous foxo overexpression (OE) accelerated aging, induced the early onset of age-related phenotypes, increased sensitivity to thermal stress, and deregulated metabolic and proteostatic pathways; these phenotypes were more intense in transgenic flies expressing high levels of foxo. Interestingly, there is a defined dosage of foxo OE in muscles and cardiomyocytes that shifts energy resources into longevity pathways and thus ameliorates not only tissue but also organismal age-related defects. Further, we found that foxo OE stimulates in an Nrf2/cncC dependent-manner, counteracting proteostatic pathways, e.g., the ubiquitin-proteasome pathway, which is central in ameliorating the aberrant foxo OE-mediated toxicity. These findings highlight the differential dose- and tissue-dependent effects of foxo on aging, metabolic and proteostatic pathways, along with the foxo-Nrf2/cncC functional crosstalk.
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Affiliation(s)
| | | | - Ioannis P. Trougakos
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece; (M.S.M.); (S.G.)
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211
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Hellinen L, Koskela A, Vattulainen E, Liukkonen M, Wegler C, Treyer A, Handin N, Svensson R, Myöhänen T, Poso A, Kaarniranta K, Artursson P, Urtti A. Inhibition of prolyl oligopeptidase: A promising pathway to prevent the progression of age-related macular degeneration. Biomed Pharmacother 2021; 146:112501. [PMID: 34891119 DOI: 10.1016/j.biopha.2021.112501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/02/2021] [Accepted: 12/02/2021] [Indexed: 01/18/2023] Open
Abstract
Dry age-related macular degeneration (AMD) is a currently untreatable vision threatening disease. Impaired proteasomal clearance and autophagy in the retinal pigment epithelium (RPE) and subsequent photoreceptor damage are connected with dry AMD, but detailed pathophysiology is still unclear. In this paper, we discover inhibition of cytosolic protease, prolyl oligopeptidase (PREP), as a potential pathway to treat dry AMD. We showed that PREP inhibitor exposure induced autophagy in the RPE cells, shown by increased LC3-II levels and decreased p62 levels. PREP inhibitor treatment increased total levels of autophagic vacuoles in the RPE cells. Global proteomics was used to examine the phenotype of a commonly used cell model displaying AMD characteristics, oxidative stress and altered protein metabolism, in vitro. These RPE cells displayed induced protein aggregation and clear alterations in macromolecule metabolism, confirming the relevance of the cell model. Differences in intracellular target engagement of PREP inhibitors were observed with cellular thermal shift assay (CETSA). These differences were explained by intracellular drug exposure (the unbound cellular partition coefficient, Kpuu). Importantly, our data is in line with previous observations regarding the discrepancy between PREP's cleaving activity and outcomes in autophagy. This highlights the need to further explore PREP's role in autophagy so that more effective compounds can be designed to battle diseases in which autophagy induction is needed. The present work is the first report investigating the PREP pathway in the RPE and we predict that the PREP inhibitors can be further optimized for treatment of dry AMD.
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Affiliation(s)
- Laura Hellinen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210 Kuopio, Finland; Department of Pharmacy, Uppsala University, 751 23 Uppsala, Sweden
| | - Ali Koskela
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FIN-70211 , Finland
| | - Elina Vattulainen
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FIN-70211 , Finland
| | - Mikko Liukkonen
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FIN-70211 , Finland
| | - Christine Wegler
- Department of Pharmacy, Uppsala University, 751 23 Uppsala, Sweden; Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Uppsala University, 751 23 Uppsala, Sweden
| | - Andrea Treyer
- Department of Pharmacy, Uppsala University, 751 23 Uppsala, Sweden
| | - Niklas Handin
- Department of Pharmacy, Uppsala University, 751 23 Uppsala, Sweden
| | - Richard Svensson
- Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Uppsala University, 751 23 Uppsala, Sweden
| | - Timo Myöhänen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210 Kuopio, Finland; Division of Pharmacology and Pharmacotherapy, Faculty of Pharmacy, University of Helsinki, Finland
| | - Antti Poso
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210 Kuopio, Finland
| | - Kai Kaarniranta
- Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, P.O. Box 1627, FIN-70211 , Finland; Department of Ophthalmology, Kuopio University Hospital, P.O. Box 1777, FIN-70211 Kuopio, Finland
| | - Per Artursson
- Department of Pharmacy, Uppsala University, 751 23 Uppsala, Sweden; Uppsala University Drug Optimization and Pharmaceutical Profiling Platform, Uppsala University, 751 23 Uppsala, Sweden; Science for Life Laboratory Drug Discovery and Development Platform, Uppsala University, 751 23 Uppsala, Sweden
| | - Arto Urtti
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, 70210 Kuopio, Finland; Drug Research Programme, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland; Laboratory of Biohybrid Technologies, Institute of Chemistry, St. Petersburg State University, Peterhoff, St. Petersburg 198504, Russia.
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212
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Ginsberg SD, Joshi S, Sharma S, Guzman G, Wang T, Arancio O, Chiosis G. The penalty of stress - Epichaperomes negatively reshaping the brain in neurodegenerative disorders. J Neurochem 2021; 159:958-979. [PMID: 34657288 PMCID: PMC8688321 DOI: 10.1111/jnc.15525] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/22/2021] [Accepted: 10/13/2021] [Indexed: 02/06/2023]
Abstract
Adaptation to acute and chronic stress and/or persistent stressors is a subject of wide interest in central nervous system disorders. In this context, stress is an effector of change in organismal homeostasis and the response is generated when the brain perceives a potential threat. Herein, we discuss a nuanced and granular view whereby a wide variety of genotoxic and environmental stressors, including aging, genetic risk factors, environmental exposures, and age- and lifestyle-related changes, act as direct insults to cellular, as opposed to organismal, homeostasis. These two concepts of how stressors impact the central nervous system are not mutually exclusive. We discuss how maladaptive stressor-induced changes in protein connectivity through epichaperomes, disease-associated pathologic scaffolds composed of tightly bound chaperones, co-chaperones, and other factors, impact intracellular protein functionality altering phenotypes, that in turn disrupt and remodel brain networks ranging from intercellular to brain connectome levels. We provide an evidence-based view on how these maladaptive changes ranging from stressor to phenotype provide unique precision medicine opportunities for diagnostic and therapeutic development, especially in the context of neurodegenerative disorders including Alzheimer's disease where treatment options are currently limited.
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Affiliation(s)
- Stephen D. Ginsberg
- Center for Dementia Research, Nathan Kline Institute, Orangeburg, New York, USA
- Departments of Psychiatry, Neuroscience & Physiology, the NYU Neuroscience Institute, New York University Grossman School of Medicine, New York City, New York, USA
| | - Suhasini Joshi
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York City, New York, USA
| | - Sahil Sharma
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York City, New York, USA
| | - Gianny Guzman
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York City, New York, USA
| | - Tai Wang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York City, New York, USA
| | - Ottavio Arancio
- Department of Pathology and Cell Biology, Columbia University, New York City, New York, USA
- Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, Columbia University, New York City, New York, USA
| | - Gabriela Chiosis
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York City, New York, USA
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York City, New York, USA
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213
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Dina E, Sklirou AD, Chatzigeorgiou S, Manola MS, Cheilari A, Louka XP, Argyropoulou A, Xynos N, Skaltsounis AL, Aligiannis N, Trougakos IP. An enriched polyphenolic extract obtained from the by-product of Rosa damascena hydrodistillation activates antioxidant and proteostatic modules. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 93:153757. [PMID: 34619431 DOI: 10.1016/j.phymed.2021.153757] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 07/14/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Prolonged maintenance of proteome stability and functionality (proteostasis) is of emerging significance in aging retardation and healthspan. PURPOSE An enriched polyphenolic extract obtained from the hydrodistillation of rose petals was tested for its capacity to activate the proteostasis network modules, and thus modulate health- and/or lifespan at the cellular and whole organism level. METHODS The aqueous extract that remained after the hydrodistillation of Rosa damascena petals, was processed with a polystyrene-FPX66 adsorption resin and sequentially fractionated by FCPC. NMR and UHPLC-HRMS analyses revealed the presence of 28 metabolites, mainly glycosides of kaempferol and quercetin. RESULTS The extract showed high in vitro antioxidant activity and was not toxic in normal human skin fibroblasts, while it promoted the upregulation of NRF2-induced antioxidant genes and main proteostatic modules. Consistently, supplementation of this extract in Drosophila flies' culture medium induced a cncC/NRF2-mediated upregulation of antioxidant and proteostatic modules. Prolonged administration of the extract in flies' culture medium was not toxic and did not affect food intake rate or fecundity; also, it delayed the age-related decline of stress tolerance and locomotion performance (neuromuscular functionality) and dose-dependently extended flies' lifespan. CONCLUSION Our findings indicate that the enriched polyphenolic extract obtained from the residue of R. damascena hydrodistillation activates cytoprotective cellular modules that, likely, contribute to its potential anti-aging properties.
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Affiliation(s)
- Evanthia Dina
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Aimilia D Sklirou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Sofia Chatzigeorgiou
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Maria S Manola
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Antigoni Cheilari
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Xanthippi P Louka
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15784, Greece
| | - Aikaterini Argyropoulou
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Nikos Xynos
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Alexios-Leandros Skaltsounis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece
| | - Nektarios Aligiannis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece.
| | - Ioannis P Trougakos
- Department of Cell Biology and Biophysics, Faculty of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15784, Greece.
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214
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Oren O, Taube R, Papo N. Amyloid β structural polymorphism, associated toxicity and therapeutic strategies. Cell Mol Life Sci 2021; 78:7185-7198. [PMID: 34643743 PMCID: PMC11072899 DOI: 10.1007/s00018-021-03954-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 08/30/2021] [Accepted: 09/27/2021] [Indexed: 12/14/2022]
Abstract
A review of the multidisciplinary scientific literature reveals a large variety of amyloid-β (Aβ) oligomeric species, differing in molecular weight, conformation and morphology. These species, which may assemble via either on- or off-aggregation pathways, exhibit differences in stability, function and neurotoxicity, according to different experimental settings. The conformations of the different Aβ species are stabilized by intra- and inter-molecular hydrogen bonds and by electrostatic and hydrophobic interactions, all depending on the chemical and physical environment (e.g., solvent, ions, pH) and interactions with other molecules, such as lipids and proteins. This complexity and the lack of a complete understanding of the relationship between the different Aβ species and their toxicity is currently dictating the nature of the inhibitor (or inducer)-based approaches that are under development for interfering with (or inducing) the formation of specific species and Aβ oligomerization, and for interfering with the associated downstream neurotoxic effects. Here, we review the principles that underlie the involvement of different Aβ oligomeric species in neurodegeneration, both in vitro and in preclinical studies. In addition, we provide an overview of the existing inhibitors (or inducers) of Aβ oligomerization that serve as potential therapeutics for neurodegenerative diseases. The review, which covers the exciting studies that have been published in the past few years, comprises three main parts: 1) on- and off-fibrillar assembly mechanisms and Aβ structural polymorphism; 2) interactions of Aβ with other molecules and cell components that dictate the Aβ aggregation pathway; and 3) targeting the on-fibrillar Aβ assembly pathway as a therapeutic approach.
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Affiliation(s)
- Ofek Oren
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, 84105, Beer-Sheva, Israel
- Department of Biotechnology Engineering, Avram and Stella Goldstein-Goren, National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, P.O. Box 653, 84105, Beer-Sheva, Israel
| | - Ran Taube
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, 84105, Beer-Sheva, Israel
| | - Niv Papo
- Department of Biotechnology Engineering, Avram and Stella Goldstein-Goren, National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev, P.O. Box 653, 84105, Beer-Sheva, Israel.
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215
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Abstract
Selective degradation of protein aggregates by macroautophagy/autophagy is an essential homeostatic process of safeguarding cells from the effects of proteotoxicity. Among the ubiquitin-like proteins, NEDD8 conjugation to misfolded proteins is prominent in stress-induced protein aggregates, albeit the function of neddylation in autophagy is unclear. Here, we report that polyneddylation functions as a post-translational modification for autophagic degradation of proteotoxic-stress induced protein aggregates. We also show that HYPK functions as an autophagy receptor in the polyneddylation-dependent aggrephagy. The scaffolding function of HYPK is facilitated by its C-terminal ubiquitin-associated domain and N-terminal tyrosine-type LC3-interacting region which bind to NEDD8 and LC3 respectively. Both NEDD8 and HYPK are positive modulators of basal and proteotoxicity-induced autophagy, leading to protection of cells from protein aggregates, such as aggregates of mutant HTT exon 1. Thus, we propose an indispensable and additive role of neddylation and HYPK in clearance of protein aggregates by autophagy, resulting in cytoprotective effect during proteotoxic stress.Abbreviations: ATG5, autophagy related 5; ATG12, autophagy related 12; ATG14, autophagy related 14; BECN1, beclin 1; CBL, casitas B-lineage lymphoma; CBLB, Cbl proto-oncogene B; GABARAP, GABA type A receptor-associated protein; GABARAPL1, GABA type A receptor associated protein like 1; GABARAPL2, GABA type A receptor associated protein like 2; GFP, green fluorescent protein; HTT, huntingtin; HTT97Q exon 1, huntingtin 97-glutamine exon 1; HUWE1, HECT, UBA and WWE domain containing E3 ubiquitin protein ligase 1; HYPK, huntingtin interacting protein K; IgG, immunoglobulin G; IMR-32, Institute for Medical Research-32; KD, knockdown; Kd, dissociation constant; LAMP1, lysosomal associated membrane protein 1; LIR, LC3 interacting region; MAP1LC3/LC3, microtubule associated protein 1 light chain 3; MAP1LC3A/LC3A, microtubule associated protein 1 light chain 3 alpha; MAP1LC3B/LC3B, microtubule associated protein 1 light chain 3 beta; MARK1, microtubule affinity regulating kinase 1; MARK2, microtubule affinity regulating kinase 2; MARK3, microtubule affinity regulating kinase 3; MARK4, microtubule affinity regulating kinase 4; MCF7, Michigan Cancer Foundation-7; MTOR, mechanistic target of rapamycin kinase; NAE1, NEDD8 activating enzyme E1 subunit 1; NBR1, NBR1 autophagy cargo receptor; NEDD8, NEDD8 ubiquitin like modifier; Ni-NTA, nickel-nitrilotriacetic acid; NUB1, negative regulator of ubiquitin like proteins 1; PIK3C3, phosphatidylinositol 3-kinase catalytic subunit type 3; PolyQ, poly-glutamine; PSMD8, proteasome 26S subunit, non-ATPase 8; RAD23A, RAD23 homolog A, nucleotide excision repair protein; RAD23B, RAD23 homolog B, nucleotide excision repair protein; RFP, red fluorescent protein; RPS27A, ribosomal protein S27a; RSC1A1, regulator of solute carriers 1; SNCA, synuclein alpha; SIK1, salt inducible kinase 1; siRNA, small interfering ribonucleic acid; SOD1, superoxide dismutase 1; SPR, surface plasmon resonance; SQSTM1, sequestosome 1; SUMO1, small ubiquitin like modifier 1; TAX1BP1, Tax1 binding protein 1; TDRD3, tudor domain containing 3; TNRC6C, trinucleotide repeat containing adaptor 6C; TOLLIP, toll interacting protein; TUBA, tubulin alpha; TUBB, tubulin beta class I; UBA, ubiquitin-associated; UBA1, ubiquitin like modifier activating enzyme 1; UBA5, ubiquitin like modifier activating enzyme 5; UBAC1, UBA domain containing 1; UBAC2, UBA domain containing 2; UBAP1, ubiquitin associated protein 1; UBAP2, ubiquitin associated protein 2; UBASH3B, ubiquitin associated and SH3 domain containing B; UBD/FAT10, ubiquitin D; UBE2K, ubiquitin conjugating enzyme E2 K; UBLs, ubiquitin-like proteins; UBL7, ubiquitin like 7; UBQLN1, ubiquilin 1; UBQLN2, ubiquilin 2; UBQLN3, ubiquilin 3; UBQLN4, ubiquilin 4; UBXN1, UBX domain protein 1; ULK1, unc-51 like autophagy activating kinase 1; URM1, ubiquitin related modifier 1; USP5, ubiquitin specific peptidase 5; USP13, ubiquitin specific peptidase 13; VPS13D, vacuolar protein sorting 13 homolog D.
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Affiliation(s)
- Debasish Kumar Ghosh
- Computational and Functional Genomics Group Centre for Dna Fingerprinting and Diagnostics Uppal Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India
| | - Akash Ranjan
- Computational and Functional Genomics Group Centre for Dna Fingerprinting and Diagnostics Uppal Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India
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216
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Yim WWY, Kurikawa Y, Mizushima N. An exploratory text analysis of the autophagy research field. Autophagy 2021; 18:1648-1661. [PMID: 34812110 PMCID: PMC9298454 DOI: 10.1080/15548627.2021.1995151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
After its discovery in the 1950 s, the autophagy research field has seen its annual number of publications climb from tens to thousands. The ever-growing number of autophagy publications is a wealth of information but presents a challenge to researchers, especially those new to the field, who are looking for a general overview of the field to, for example, determine current topics of the field or formulate new hypotheses. Here, we employed text mining tools to extract research trends in the autophagy field, including those of genes, terms, and topics. The publication trend of the field can be separated into three phases. The exponential rise in publication number began in the last phase and is most likely spurred by a series of highly cited research papers published in previous phases. The exponential increase in papers has resulted in a larger variety of research topics, with the majority involving those that are directly physiologically relevant, such as disease and modulating autophagy. Our findings provide researchers a summary of the history of the autophagy research field and perhaps hints of what is to come.Abbreviations: 5Y-IF: 5-year impact factor; AIS: article influence score; EM: electron microscopy; HGNC: HUGO gene nomenclature committee; LDA: latent Dirichlet allocation; MeSH: medical subject headings; ncRNA: non-coding RNA.
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Affiliation(s)
- Willa Wen-You Yim
- Department of Biochemistry and Molecular Biology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshitaka Kurikawa
- Department of Biochemistry and Molecular Biology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Noboru Mizushima
- Department of Biochemistry and Molecular Biology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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217
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Sarkar A, Nazir A. Carrying Excess Baggage Can Slowdown Life: Protein Clearance Machineries That Go Awry During Aging and the Relevance of Maintaining Them. Mol Neurobiol 2021; 59:821-840. [PMID: 34792731 DOI: 10.1007/s12035-021-02640-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 11/05/2021] [Indexed: 01/07/2023]
Abstract
Cellular homeostasis is maintained by rapid and systematic cleansing of aberrant and aggregated proteins within cells. Neurodegenerative diseases (NDs) especially Parkinson's and Alzheimer's disease are known to be associated with multiple factors, most important being impaired clearance of aggregates, resulting in the accumulation of specific aggregated protein in the brain. Protein quality control (PQC) of proteostasis network comprises proteolytic machineries and chaperones along with their regulators to ensure precise operation and maintenance of proteostasis. Such regulatory factors coordinate among each other multiple functional aspects related to proteins, including their synthesis, folding, transport, and degradation. During aging due to inevitable endogenous and external stresses, sustaining a proteome balance is a challenging task. Such stresses decline the capacity of the proteostasis network compromising the proteome integrity, affecting the fundamental physiological processes including reproductive fitness of the organism. This review focuses on highlighting proteome-wide changes during aging and the strategies for proteostasis improvements. The possibility of augmenting the proteostasis network either via genetic or pharmacological interventions may be a promising strategy towards delaying age-associated pathological consequences due to proteome disbalance, thus promoting healthy aging and prolonged longevity.
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Affiliation(s)
- Arunabh Sarkar
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow, UP, 226031, India
| | - Aamir Nazir
- Division of Neuroscience and Ageing Biology, CSIR-Central Drug Research Institute, Lucknow, UP, 226031, India.
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218
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Chinnathambi S, Gorantla NV. Implications of Valosin-containing Protein in Promoting Autophagy to Prevent Tau Aggregation. Neuroscience 2021; 476:125-134. [PMID: 34509548 DOI: 10.1016/j.neuroscience.2021.09.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 08/14/2021] [Accepted: 09/02/2021] [Indexed: 12/20/2022]
Abstract
Chaperones and cellular degradative mechanisms modulate Tau aggregation. During aging and neurodegenerative disorders, the cellular proteostasis is disturbed due to impaired protective mechanisms. This results in accumulation of aberrant Tau aggregates in the neuron that leads to microtubule destabilization and neuronal degeneration. The intricate mechanisms to prevent Tau aggregation involve chaperones, autophagy, and proteasomal system have gained main focus about concerning to therapeutic intervention. However, the thorough understanding of other key proteins, such as Valosin-containing protein (VCP), is limited. In various neurodegenerative diseases, the chaperone-like activity of VCP is involved in preventing protein aggregation and mediating the degradation of aberrant proteins by proteasome and autophagy. In the case of Tau aggregation associated with Alzheimer's disease, the importance of VCP is poorly understood. VCP is known to co-localize with Tau, and alterations in VCP cause aberrant accumulation of Tau. Nevertheless, the direct mechanism of VCP in altering Tau aggregation is not known. Hence, we speculate that VCP might be one of the key modulators in preventing Tau aggregation and can disintegrate Tau aggregates by directing its clearance by autophagy.
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Affiliation(s)
- Subashchandrabose Chinnathambi
- Neurobiology Group, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Nalini Vijay Gorantla
- Neurobiology Group, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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219
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Finger F, Ottens F, Hoppe T. The Argonaute Proteins ALG-1 and ALG-2 Are Linked to Stress Resistance and Proteostasis. MICROPUBLICATION BIOLOGY 2021; 2021. [PMID: 34723149 PMCID: PMC8553546 DOI: 10.17912/micropub.biology.000457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/27/2021] [Accepted: 09/12/2021] [Indexed: 11/06/2022]
Abstract
The conserved Argonaute-family members ALG-1 and ALG-2 are known to regulate processing and maturation of microRNAs to target mRNAs for degradation or translational inhibition (Bouasker and Simard 2012; Meister 2013). Consequently, depletion of alg-1 and alg-2 results in multiple phenotypes. Our data describe a role of microRNA-regulation in stress resistance and proteostasis with special emphasis on ubiquitin-dependent degradation pathways, such as ubiquitin fusion degradation (UFD) and endoplasmic reticulum (ER)-associated protein degradation (ERAD).
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Affiliation(s)
- Fabian Finger
- Institute for Genetics, University of Cologne, 50674 Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany.,Novo Nordisk Foundation Center for Basic Metabolic Research, DK-2200 Copenhagen N, Denmark
| | - Franziska Ottens
- Institute for Genetics, University of Cologne, 50674 Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany
| | - Thorsten Hoppe
- Institute for Genetics, University of Cologne, 50674 Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Response in Aging-Associated Diseases (CECAD), University of Cologne, 50931 Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), Faculty of Medicine and University Hospital of Cologne, 50931 Cologne, Germany
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220
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Pras A, Houben B, Aprile FA, Seinstra R, Gallardo R, Janssen L, Hogewerf W, Gallrein C, De Vleeschouwer M, Mata‐Cabana A, Koopman M, Stroo E, de Vries M, Louise Edwards S, Kirstein J, Vendruscolo M, Falsone SF, Rousseau F, Schymkowitz J, Nollen EAA. The cellular modifier MOAG-4/SERF drives amyloid formation through charge complementation. EMBO J 2021; 40:e107568. [PMID: 34617299 PMCID: PMC8561633 DOI: 10.15252/embj.2020107568] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 08/27/2021] [Accepted: 09/01/2021] [Indexed: 11/09/2022] Open
Abstract
While aggregation-prone proteins are known to accelerate aging and cause age-related diseases, the cellular mechanisms that drive their cytotoxicity remain unresolved. The orthologous proteins MOAG-4, SERF1A, and SERF2 have recently been identified as cellular modifiers of such proteotoxicity. Using a peptide array screening approach on human amyloidogenic proteins, we found that SERF2 interacted with protein segments enriched in negatively charged and hydrophobic, aromatic amino acids. The absence of such segments, or the neutralization of the positive charge in SERF2, prevented these interactions and abolished the amyloid-promoting activity of SERF2. In protein aggregation models in the nematode worm Caenorhabditis elegans, protein aggregation and toxicity were suppressed by mutating the endogenous locus of MOAG-4 to neutralize charge. Our data indicate that MOAG-4 and SERF2 drive protein aggregation and toxicity by interactions with negatively charged segments in aggregation-prone proteins. Such charge interactions might accelerate primary nucleation of amyloid by initiating structural changes and by decreasing colloidal stability. Our study points at charge interactions between cellular modifiers and amyloidogenic proteins as potential targets for interventions to reduce age-related protein toxicity.
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Affiliation(s)
- Anita Pras
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Bert Houben
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Francesco A Aprile
- Department of ChemistryCentre for Misfolding DiseasesUniversity of CambridgeCambridgeUK
- Present address:
Department of ChemistryMolecular Sciences Research HubImperial College LondonLondonUK
| | - Renée Seinstra
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Rodrigo Gallardo
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
- Present address:
Astbury Centre for Structural Molecular BiologySchool of Molecular and Cellular BiologyUniversity of LeedsLeedsUK
| | - Leen Janssen
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Wytse Hogewerf
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Christian Gallrein
- Department of Molecular Physiology and Cell BiologyLeibniz Research Institute for Molecular Pharmacology im Forschungsverbund Berlin e.V. (FMP)BerlinGermany
| | - Matthias De Vleeschouwer
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Alejandro Mata‐Cabana
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Mandy Koopman
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Esther Stroo
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Minke de Vries
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Samantha Louise Edwards
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Janine Kirstein
- Department of Molecular Physiology and Cell BiologyLeibniz Research Institute for Molecular Pharmacology im Forschungsverbund Berlin e.V. (FMP)BerlinGermany
- Faculty of Biology & ChemistryUniversity of BremenBremenGermany
| | - Michele Vendruscolo
- Department of ChemistryCentre for Misfolding DiseasesUniversity of CambridgeCambridgeUK
| | | | - Frederic Rousseau
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Joost Schymkowitz
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Ellen A A Nollen
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
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221
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Olsen AL, Feany MB. Parkinson's disease risk genes act in glia to control neuronal α-synuclein toxicity. Neurobiol Dis 2021; 159:105482. [PMID: 34390834 PMCID: PMC8502212 DOI: 10.1016/j.nbd.2021.105482] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 08/04/2021] [Accepted: 08/09/2021] [Indexed: 11/18/2022] Open
Abstract
Idiopathic Parkinson's disease is the second most common neurodegenerative disease and is estimated to be approximately 30% heritable. Genome wide association studies have revealed numerous loci associated with risk of development of Parkinson's disease. The majority of genes identified in these studies are expressed in glia at either similar or greater levels than their expression in neurons, suggesting that glia may play a role in Parkinson's disease pathogenesis. The role of individual glial risk genes in Parkinson's disease development or progression is unknown, however. We hypothesized that some Parkinson's disease risk genes exert their effects through glia. We developed a Drosophila model of α-synucleinopathy in which we can independently manipulate gene expression in neurons and glia. Human wild type α-synuclein is expressed in all neurons, and these flies develop the hallmarks of Parkinson's disease, including motor impairment, death of dopaminergic and other neurons, and α-synuclein aggregation. In these flies, we performed a candidate genetic screen, using RNAi to knockdown 14 well-validated Parkinson's disease risk genes in glia and measuring the effect on locomotion in order to identify glial modifiers of the α-synuclein phenotype. We identified 4 modifiers: aux, Lrrk, Ric, and Vps13, orthologs of the human genes GAK, LRRK2, RIT2, and VPS13C, respectively. Knockdown of each gene exacerbated neurodegeneration as measured by total and dopaminergic neuron loss. Knockdown of each modifier also increased α-synuclein oligomerization. These results suggest that some Parkinson's disease risk genes exert their effects in glia and that glia can influence neuronal α-synuclein proteostasis in a non-cell-autonomous fashion. Further, this study provides proof of concept that our novel Drosophila α-synucleinopathy model can be used to study glial modifier genes, paving the way for future large unbiased screens to identify novel glial risk factors that contribute to PD risk and progression.
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Affiliation(s)
- Abby L Olsen
- Department of Neurology, Brigham and Women's Hospital, Massachusetts General Hospital, Harvard Medical School, United States of America; Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, United States of America
| | - Mel B Feany
- Department of Neurology, Brigham and Women's Hospital, Massachusetts General Hospital, Harvard Medical School, United States of America; Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, United States of America.
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222
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Rimal S, Li Y, Vartak R, Geng J, Tantray I, Li S, Huh S, Vogel H, Glabe C, Grinberg LT, Spina S, Seeley WW, Guo S, Lu B. Inefficient quality control of ribosome stalling during APP synthesis generates CAT-tailed species that precipitate hallmarks of Alzheimer's disease. Acta Neuropathol Commun 2021; 9:169. [PMID: 34663454 PMCID: PMC8522249 DOI: 10.1186/s40478-021-01268-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 09/26/2021] [Indexed: 11/25/2022] Open
Abstract
Amyloid precursor protein (APP) metabolism is central to Alzheimer's disease (AD) pathogenesis, but the key etiological driver remains elusive. Recent failures of clinical trials targeting amyloid-β (Aβ) peptides, the proteolytic fragments of amyloid precursor protein (APP) that are the main component of amyloid plaques, suggest that the proteostasis-disrupting, key pathogenic species remain to be identified. Previous studies suggest that APP C-terminal fragment (APP.C99) can cause disease in an Aβ-independent manner. The mechanism of APP.C99 pathogenesis is incompletely understood. We used Drosophila models expressing APP.C99 with the native ER-targeting signal of human APP, expressing full-length human APP only, or co-expressing full-length human APP and β-secretase (BACE), to investigate mechanisms of APP.C99 pathogenesis. Key findings are validated in mammalian cell culture models, mouse 5xFAD model, and postmortem AD patient brain materials. We find that ribosomes stall at the ER membrane during co-translational translocation of APP.C99, activating ribosome-associated quality control (RQC) to resolve ribosome collision and stalled translation. Stalled APP.C99 species with C-terminal extensions (CAT-tails) resulting from inadequate RQC are prone to aggregation, causing endolysosomal and autophagy defects and seeding the aggregation of amyloid β peptides, the main component of amyloid plaques. Genetically removing stalled and CAT-tailed APP.C99 rescued proteostasis failure, endolysosomal/autophagy dysfunction, neuromuscular degeneration, and cognitive deficits in AD models. Our finding of RQC factor deposition at the core of amyloid plaques from AD brains further supports the central role of defective RQC of ribosome collision and stalled translation in AD pathogenesis. These findings demonstrate that amyloid plaque formation is the consequence and manifestation of a deeper level proteostasis failure caused by inadequate RQC of translational stalling and the resultant aberrantly modified APP.C99 species, previously unrecognized etiological drivers of AD and newly discovered therapeutic targets.
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Affiliation(s)
- Suman Rimal
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Yu Li
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Rasika Vartak
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ji Geng
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ishaq Tantray
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Shuangxi Li
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Sungun Huh
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Hannes Vogel
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Charles Glabe
- Department of Molecular Biology and Biochemistry, University of California, Irvine, CA, USA
| | - Lea T Grinberg
- Memory and Aging Center, Department of Neurology and Department of Pathology, University of California, San Francisco, CA, 94158, USA
| | - Salvatore Spina
- Memory and Aging Center, Department of Neurology and Department of Pathology, University of California, San Francisco, CA, 94158, USA
| | - William W Seeley
- Memory and Aging Center, Department of Neurology and Department of Pathology, University of California, San Francisco, CA, 94158, USA
| | - Su Guo
- Department of Bioengineering and Therapeutic Sciences, Programs in Human Genetics and Biological Sciences, Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, CA, USA
| | - Bingwei Lu
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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223
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Ryan KC, Ashkavand Z, Sarasija S, Laboy JT, Samarakoon R, Norman KR. Increased mitochondrial calcium uptake and concomitant mitochondrial activity by presenilin loss promotes mTORC1 signaling to drive neurodegeneration. Aging Cell 2021; 20:e13472. [PMID: 34499406 PMCID: PMC8520713 DOI: 10.1111/acel.13472] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 06/21/2021] [Accepted: 08/05/2021] [Indexed: 12/21/2022] Open
Abstract
Metabolic dysfunction and protein aggregation are common characteristics that occur in age‐related neurodegenerative disease. However, the mechanisms underlying these abnormalities remain poorly understood. We have found that mutations in the gene encoding presenilin in Caenorhabditis elegans, sel‐12, results in elevated mitochondrial activity that drives oxidative stress and neuronal dysfunction. Mutations in the human presenilin genes are the primary cause of familial Alzheimer's disease. Here, we demonstrate that loss of SEL‐12/presenilin results in the hyperactivation of the mTORC1 pathway. This hyperactivation is caused by elevated mitochondrial calcium influx and, likely, the associated increase in mitochondrial activity. Reducing mTORC1 activity improves proteostasis defects and neurodegenerative phenotypes associated with loss of SEL‐12 function. Consistent with high mTORC1 activity, we find that SEL‐12 loss reduces autophagosome formation, and this reduction is prevented by limiting mitochondrial calcium uptake. Moreover, the improvements of proteostasis and neuronal defects in sel‐12 mutants due to mTORC1 inhibition require the induction of autophagy. These results indicate that mTORC1 hyperactivation exacerbates the defects in proteostasis and neuronal function in sel‐12 mutants and demonstrate a critical role of presenilin in promoting neuronal health.
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Affiliation(s)
- Kerry C. Ryan
- Department of Regenerative and Cancer Cell Biology Albany Medical College Albany New York USA
| | - Zahra Ashkavand
- Department of Regenerative and Cancer Cell Biology Albany Medical College Albany New York USA
| | - Shaarika Sarasija
- Department of Regenerative and Cancer Cell Biology Albany Medical College Albany New York USA
| | - Jocelyn T. Laboy
- Department of Regenerative and Cancer Cell Biology Albany Medical College Albany New York USA
| | - Rohan Samarakoon
- Department of Regenerative and Cancer Cell Biology Albany Medical College Albany New York USA
| | - Kenneth R. Norman
- Department of Regenerative and Cancer Cell Biology Albany Medical College Albany New York USA
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224
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Blumenstock S, Schulz-Trieglaff EK, Voelkl K, Bolender AL, Lapios P, Lindner J, Hipp MS, Hartl FU, Klein R, Dudanova I. Fluc-EGFP reporter mice reveal differential alterations of neuronal proteostasis in aging and disease. EMBO J 2021; 40:e107260. [PMID: 34410010 PMCID: PMC8488555 DOI: 10.15252/embj.2020107260] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 07/09/2021] [Accepted: 07/19/2021] [Indexed: 12/22/2022] Open
Abstract
The cellular protein quality control machinery is important for preventing protein misfolding and aggregation. Declining protein homeostasis (proteostasis) is believed to play a crucial role in age‐related neurodegenerative disorders. However, how neuronal proteostasis capacity changes in different diseases is not yet sufficiently understood, and progress in this area has been hampered by the lack of tools to monitor proteostasis in mammalian models. Here, we have developed reporter mice for in vivo analysis of neuronal proteostasis. The mice express EGFP‐fused firefly luciferase (Fluc‐EGFP), a conformationally unstable protein that requires chaperones for proper folding, and that reacts to proteotoxic stress by formation of intracellular Fluc‐EGFP foci and by reduced luciferase activity. Using these mice, we provide evidence for proteostasis decline in the aging brain. Moreover, we find a marked reaction of the Fluc‐EGFP sensor in a mouse model of tauopathy, but not in mouse models of Huntington’s disease. Mechanistic investigations in primary neuronal cultures demonstrate that different types of protein aggregates have distinct effects on the cellular protein quality control. Thus, Fluc‐EGFP reporter mice enable new insights into proteostasis alterations in different diseases.
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Affiliation(s)
- Sonja Blumenstock
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany.,Molecular Neurodegeneration Group, Max Planck Institute of Neurobiology, Martinsried, Germany
| | | | - Kerstin Voelkl
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany.,Molecular Neurodegeneration Group, Max Planck Institute of Neurobiology, Martinsried, Germany
| | - Anna-Lena Bolender
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany.,Molecular Neurodegeneration Group, Max Planck Institute of Neurobiology, Martinsried, Germany
| | - Paul Lapios
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany.,Molecular Neurodegeneration Group, Max Planck Institute of Neurobiology, Martinsried, Germany
| | - Jana Lindner
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany
| | - Mark S Hipp
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany.,Department of Biomedical Sciences of Cells and Systems, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,School of Medicine and Health Sciences, Carl von Ossietzky University Oldenburg, Oldenburg, Germany
| | - F Ulrich Hartl
- Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Rüdiger Klein
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany
| | - Irina Dudanova
- Department of Molecules - Signaling - Development, Max Planck Institute of Neurobiology, Martinsried, Germany.,Molecular Neurodegeneration Group, Max Planck Institute of Neurobiology, Martinsried, Germany
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225
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Small-molecule inhibitor targeting the Hsp70-Bim protein-protein interaction in CML cells overcomes BCR-ABL-independent TKI resistance. Leukemia 2021; 35:2862-2874. [PMID: 34007045 DOI: 10.1038/s41375-021-01283-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 04/21/2021] [Accepted: 05/04/2021] [Indexed: 02/06/2023]
Abstract
Herein, we screened a novel inhibitor of the Hsp70-Bim protein-protein interaction (PPI), S1g-2, from a Bcl-2 inhibitor library; this compound specifically disrupted the Hsp70-Bim PPI by direct binding to an unknown site adjacent to that of an allosteric Hsp70 inhibitor MKT-077, showing binding affinity in sub-μM concentration range. S1g-2 exhibited overall 5-10-fold higher apoptosis-inducing activity in CML cells, primary CML blasts, and BCR-ABL-transformed BaF3 cells than other cancer cells, normal lymphocytes, and BaF3 cells, illustrating Hsp70-Bim PPI driven by BCR-ABL protects CML through oncoclient proteins that enriched in three pathways: eIF2 signaling, the regulation of eIF4E and p70S6K signaling, and the mTOR signaling pathways. Moreover, S1g-2 progressively enhanced lethality along with the increase in BCR-ABL-independent TKI resistance in the K562 cell lines and is more effective in primary samples from BCR-ABL-independent TKI-resistant patients than those from TKI-sensitive patients. By comparing the underlying mechanisms of S1g-2, MKT-077, and an ATP-competitive Hsp70 inhibitor VER-155008, the Hsp70-Bim PPI was identified to be a CML-specific target to protect from TKIs through the above three oncogenic signaling pathways. The in vivo activity against CML and low toxicity endows S1g-2 a first-in-class promising drug candidate for both TKI-sensitive and resistant CML.
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226
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Silva NSM, Rodrigues LFDC, Dores-Silva PR, Montanari CA, Ramos CHI, Barbosa LRS, Borges JC. Structural, thermodynamic and functional studies of human 71 kDa heat shock cognate protein (HSPA8/hHsc70). BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2021; 1869:140719. [PMID: 34571256 DOI: 10.1016/j.bbapap.2021.140719] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/29/2021] [Accepted: 09/21/2021] [Indexed: 01/14/2023]
Abstract
Human 71 kDa heat shock cognate protein (HSPA8, also known as Hsc70, Hsp70-8, Hsc71, Hsp71 or Hsp73) is a constitutively expressed chaperone that is critical for cell proteostasis. In the cytosol, HSPA8 plays a pivotal role in folding and refolding, facilitates protein trafficking across membranes and targets proteins for degradation, among other functions. Here, we report an in solution study of recombinant HSPA8 (rHSPA8) using a variety of biophysical and biochemical approaches. rHSPA8 shares several structural and functional similarities with others human Hsp70s. It has two domains with different stabilities and interacts with adenosine nucleotides with dissociation constants in the low micromolar range, which were higher in the presence of Mg2+. rHSPA8 showed lower ATPase activity than its homolog HSPA5/hGrp78/hBiP, but it was 4-fold greater than that of recombinant HSPA1A/hHsp70-1A, with which it is 86% identical. Small angle X-ray scattering indicated that rHSPA8 behaved as an elongated monomeric protein in solution with dimensions similar to those observed for HSPA1A. In addition, rHSPA8 showed structural flexibility between its compacted and extended conformations. The data also indicated that HSPA8 has capacity in preventing the aggregation of model client proteins. The present study expands the understanding of the structure and activity of this chaperone and aligns with the idea that human homologous Hsp70s have divergent functions.
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Affiliation(s)
| | | | - Paulo Roberto Dores-Silva
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, Brazil; Division of Trauma, Critical Care, Burns and Acute Care Surgery, Department of Surgery School of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | | | | | - Leandro Ramos Souza Barbosa
- Institute of Physics, University of São Paulo, São Paulo, SP, Brazil; Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Júlio César Borges
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, SP, Brazil.
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227
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Tundo GR, Sbardella D, Oddone F, Kudriaeva AA, Lacal PM, Belogurov AA, Graziani G, Marini S. At the Cutting Edge against Cancer: A Perspective on Immunoproteasome and Immune Checkpoints Modulation as a Potential Therapeutic Intervention. Cancers (Basel) 2021; 13:4852. [PMID: 34638337 PMCID: PMC8507813 DOI: 10.3390/cancers13194852] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 01/22/2023] Open
Abstract
Immunoproteasome is a noncanonical form of proteasome with enzymological properties optimized for the generation of antigenic peptides presented in complex with class I MHC molecules. This enzymatic property makes the modulation of its activity a promising area of research. Nevertheless, immunotherapy has emerged as a front-line treatment of advanced/metastatic tumors providing outstanding improvement of life expectancy, even though not all patients achieve a long-lasting clinical benefit. To enhance the efficacy of the currently available immunotherapies and enable the development of new strategies, a broader knowledge of the dynamics of antigen repertoire processing by cancer cells is needed. Therefore, a better understanding of the role of immunoproteasome in antigen processing and of the therapeutic implication of its modulation is mandatory. Studies on the potential crosstalk between proteasome modulators and immune checkpoint inhibitors could provide novel perspectives and an unexplored treatment option for a variety of cancers.
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Affiliation(s)
| | | | | | - Anna A. Kudriaeva
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; (A.A.K.)
| | - Pedro M. Lacal
- Laboratory of Molecular Oncology, IDI-IRCCS, 00167 Rome, Italy;
| | - Alexey A. Belogurov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; (A.A.K.)
- Lomonosov Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - Grazia Graziani
- Laboratory of Molecular Oncology, IDI-IRCCS, 00167 Rome, Italy;
- Department of Systems Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Stefano Marini
- Department of Clinical Sciences and Translational Medicine, University of Rome Tor Vergata, 00133 Rome, Italy;
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228
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Bach DM, Holzman MA, Wague F, Miranda JL, Lopatkin AJ, Mansfield JH, Snow JW. Thermal stress induces tissue damage and a broad shift in regenerative signaling pathways in the honey bee digestive tract. J Exp Biol 2021; 224:272039. [PMID: 34477881 DOI: 10.1242/jeb.242262] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 08/19/2021] [Indexed: 11/20/2022]
Abstract
Honey bee colonies in the USA have suffered from increased die-off in the last few years with a complex set of interacting stresses playing a key role. With changing climate, an increase in the frequency of severe weather events, such as heat waves, is anticipated. Understanding how these changes may contribute to stress in honey bees is crucial. Individual honey bees appear to have a high capacity to endure thermal stress. One reason for this high-level endurance is likely their robust heat shock response (HSR), which contributes to thermotolerance at the cellular level. However, less is known about other mechanisms of thermotolerance, especially those operating at the tissue level. To elucidate other determinants of resilience in this species, we used thermal stress coupled with RNAseq and identified broad transcriptional remodeling of a number of key signaling pathways in the honey bee, including those pathways known to be involved in digestive tract regeneration in the fruit fly such as the Hippo and JAK/STAT pathways. We also observed cell death and shedding of epithelial cells, which likely leads to induction of this regenerative transcriptional program. We found that thermal stress affects many of these pathways in other tissues, suggesting a shared program of damage response. This study provides important foundational characterization of the tissue damage response program in this key pollinating species. In addition, our data suggest that a robust regeneration program may also be a critical contributor to thermotolerance at the tissue level, a possibility which warrants further exploration in this and other species.
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Affiliation(s)
- Dunay M Bach
- Biology Department, Barnard College, New York, NY 10027, USA
| | | | - Fatoumata Wague
- Biology Department, Barnard College, New York, NY 10027, USA
| | - Jj L Miranda
- Biology Department, Barnard College, New York, NY 10027, USA
| | - Allison J Lopatkin
- Biology Department, Barnard College, New York, NY 10027, USA.,Department of Ecology, Evolution, and Environmental Biology, Columbia University, New York, NY 10027, USA.,Data Science Institute , Columbia University, New York, NY 10027, USA
| | | | - Jonathan W Snow
- Biology Department, Barnard College, New York, NY 10027, USA
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229
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Verma K, Verma M, Chaphalkar A, Chakraborty K. Recent advances in understanding the role of proteostasis. Fac Rev 2021; 10:72. [PMID: 34632458 PMCID: PMC8483240 DOI: 10.12703/r/10-72] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Maintenance of a functional proteome is achieved through the mechanism of proteostasis that involves precise coordination between molecular machineries assisting a protein from its conception to demise. Although each organelle within a cell has its own set of proteostasis machinery, inter-organellar communication and cell non-autonomous signaling bring forth the multidimensional nature of the proteostasis network. Exposure to extrinsic and intrinsic stressors can challenge the proteostasis network, leading to the accumulation of aberrant proteins or a decline in the proteostasis components, as seen during aging and in several diseases. Here, we summarize recent advances in understanding the role of proteostasis and its regulation in aging and disease, including monogenetic and infectious diseases. We highlight some of the emerging as well as unresolved questions in proteostasis that need to be addressed to overcome pathologies associated with damaged proteins and to promote healthy aging.
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Affiliation(s)
- Kanika Verma
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, Delhi, India
- Academy of Scientific and Innovative Research, CSIR-HRDC, Ghaziabad, Uttar Pradesh, India
| | - Monika Verma
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, Delhi, India
- Academy of Scientific and Innovative Research, CSIR-HRDC, Ghaziabad, Uttar Pradesh, India
| | - Aseem Chaphalkar
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, Delhi, India
- Academy of Scientific and Innovative Research, CSIR-HRDC, Ghaziabad, Uttar Pradesh, India
| | - Kausik Chakraborty
- CSIR-Institute of Genomics and Integrative Biology, Mathura Road, Delhi, India
- Academy of Scientific and Innovative Research, CSIR-HRDC, Ghaziabad, Uttar Pradesh, India
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230
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Pandey A, Shah SJ, Butler J, Kellogg DL, Lewis GD, Forman DE, Mentz RJ, Borlaug BA, Simon MA, Chirinos JA, Fielding RA, Volpi E, Molina AJA, Haykowsky MJ, Sam F, Goodpaster BH, Bertoni AG, Justice JN, White JP, Ding J, Hummel SL, LeBrasseur NK, Taffet GE, Pipinos II, Kitzman D. Exercise Intolerance in Older Adults With Heart Failure With Preserved Ejection Fraction: JACC State-of-the-Art Review. J Am Coll Cardiol 2021; 78:1166-1187. [PMID: 34503685 PMCID: PMC8525886 DOI: 10.1016/j.jacc.2021.07.014] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 12/16/2022]
Abstract
Exercise intolerance (EI) is the primary manifestation of chronic heart failure with preserved ejection fraction (HFpEF), the most common form of heart failure among older individuals. The recent recognition that HFpEF is likely a systemic, multiorgan disorder that shares characteristics with other common, difficult-to-treat, aging-related disorders suggests that novel insights may be gained from combining knowledge and concepts from aging and cardiovascular disease disciplines. This state-of-the-art review is based on the outcomes of a National Institute of Aging-sponsored working group meeting on aging and EI in HFpEF. We discuss aging-related and extracardiac contributors to EI in HFpEF and provide the rationale for a transdisciplinary, "gero-centric" approach to advance our understanding of EI in HFpEF and identify promising new therapeutic targets. We also provide a framework for prioritizing future research, including developing a uniform, comprehensive approach to phenotypic characterization of HFpEF, elucidating key geroscience targets for treatment, and conducting proof-of-concept trials to modify these targets.
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Affiliation(s)
- Ambarish Pandey
- University of Texas Southwestern Medical Center, Dallas, Texas, USA. https://twitter.com/ambarish4786
| | - Sanjiv J Shah
- Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Javed Butler
- University of Mississippi Medical Center, Jackson, Mississippi, USA
| | - Dean L Kellogg
- University of Texas Health Science Center and GRECC, South Texas Veterans Affairs Health System, San Antonio, Texas, USA
| | | | - Daniel E Forman
- University of Pittsburgh and VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA
| | - Robert J Mentz
- Duke Clinical Research Center, Durham, North Carolina, USA
| | | | - Marc A Simon
- University of Pittsburgh and VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, USA
| | | | | | - Elena Volpi
- University of Texas Medical Branch at Galveston, Galveston, Texas, USA
| | | | | | - Flora Sam
- Boston University School of Medicine, Boston, Massachusetts, USA
| | - Bret H Goodpaster
- Advent Health Translational Research Institute, Orlando, Florida, USA
| | - Alain G Bertoni
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Jamie N Justice
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | | | - Jingzhone Ding
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Scott L Hummel
- University of Michigan and the VA Ann Arbor Health System, Ann Arbor, Michigan, USA
| | | | | | | | - Dalane Kitzman
- Wake Forest School of Medicine, Winston-Salem, North Carolina, USA.
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231
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Matei IV, Samukange VNC, Bunu G, Toren D, Ghenea S, Tacutu R. Knock-down of odr-3 and ife-2 additively extends lifespan and healthspan in C. elegans. Aging (Albany NY) 2021; 13:21040-21065. [PMID: 34506301 PMCID: PMC8457566 DOI: 10.18632/aging.203518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/24/2021] [Indexed: 01/04/2023]
Abstract
Genetic manipulations can ameliorate the aging process and extend the lifespan of model organisms. The aim of this research was to identify novel genetic interventions that promote both lifespan and healthspan, by combining the effects of multiple longevity-associated gene inactivations in C. elegans. For this, the individual and combined effects of the odr-3 mutation and of ife-2 and cku-70 knock-downs were studied, both in the wild type and daf-16 mutant backgrounds. We found that besides increasing the lifespan of wild type animals, the knock-down of ife-2 (starting at L4) also extends the lifespan and healthspan of long-lived odr-3 mutants. In the daf-16 background, ife-2 and odr-3 impairment exert opposing effects individually, while the daf-16; odr-3; ife-2 deficient animals show a similar lifespan and healthspan as daf-16, suggesting that the odr-3 and ife-2 effector outcomes converge downstream of DAF-16. By contrast, cku-70 knock-down did not extend the lifespan of single or double odr-3; ife-2 inactivated animals, and was slightly deleterious to healthspan. In conclusion, we report that impairment of odr-3 and ife-2 increases lifespan and healthspan in an additive and synergistic manner, respectively, and that this result is not improved by further knocking-down cku-70.
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Affiliation(s)
- Ioan Valentin Matei
- Systems Biology of Aging Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | | | - Gabriela Bunu
- Systems Biology of Aging Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Dmitri Toren
- Systems Biology of Aging Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Center for Multidisciplinary Research on Aging, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Simona Ghenea
- Systems Biology of Aging Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
| | - Robi Tacutu
- Systems Biology of Aging Group, Institute of Biochemistry of the Romanian Academy, Bucharest, Romania
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232
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Cooper JF, Guasp RJ, Arnold ML, Grant BD, Driscoll M. Stress increases in exopher-mediated neuronal extrusion require lipid biosynthesis, FGF, and EGF RAS/MAPK signaling. Proc Natl Acad Sci U S A 2021; 118:e2101410118. [PMID: 34475208 PMCID: PMC8433523 DOI: 10.1073/pnas.2101410118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 06/23/2021] [Indexed: 01/08/2023] Open
Abstract
In human neurodegenerative diseases, neurons can transfer toxic protein aggregates to surrounding cells, promoting pathology via poorly understood mechanisms. In Caenorhabditis elegans, proteostressed neurons can expel neurotoxic proteins in large, membrane-bound vesicles called exophers. We investigated how specific stresses impact neuronal trash expulsion to show that neuronal exopher production can be markedly elevated by oxidative and osmotic stress. Unexpectedly, we also found that fasting dramatically increases exophergenesis. Mechanistic dissection focused on identifying nonautonomous factors that sense and activate the fasting-induced exopher response revealed that DAF16/FOXO-dependent and -independent processes are engaged. Fasting-induced exopher elevation requires the intestinal peptide transporter PEPT-1, lipid synthesis transcription factors Mediator complex MDT-15 and SBP-1/SREPB1, and fatty acid synthase FASN-1, implicating remotely initiated lipid signaling in neuronal trash elimination. A conserved fibroblast growth factor (FGF)/RAS/MAPK signaling pathway that acts downstream of, or in parallel to, lipid signaling also promotes fasting-induced neuronal exopher elevation. A germline-based epidermal growth factor (EGF) signal that acts through neurons is also required for exopher production. Our data define a nonautonomous network that links food availability changes to remote, and extreme, neuronal homeostasis responses relevant to aggregate transfer biology.
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Affiliation(s)
- Jason F Cooper
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854
| | - Ryan J Guasp
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854
| | - Meghan Lee Arnold
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854
| | - Barth D Grant
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854
- Rutgers Center for Lipid Research, Rutgers University, New Brunswick, NJ 08901
| | - Monica Driscoll
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, NJ 08854;
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233
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Campos J, Silva NA, Salgado AJ. Nutritional interventions for spinal cord injury: preclinical efficacy and molecular mechanisms. Nutr Rev 2021; 80:1206-1221. [PMID: 34472615 DOI: 10.1093/nutrit/nuab068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Spinal cord injury (SCI) is a debilitating condition that leads to motor, sensory, and autonomic impairments. Its intrinsic pathophysiological complexity has hindered the establishment of effective treatments for decades. Nutritional interventions (NIs) for SCI have been proposed as a route to circumvent some of the problems associated with this condition. Results obtained in animal models point to a more holistic effect, rather than to specific modulation, of several relevant SCI pathophysiological processes. Indeed, published data have shown NI improves energetic imbalance, oxidative damage, and inflammation, which are promoters of improved proteostasis and neurotrophic signaling, leading ultimately to neuroprotection and neuroplasticity. This review focuses on the most well-documented Nis. The mechanistic implications and their translational potential for SCI are discussed.
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Affiliation(s)
- Jonas Campos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno A Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - António J Salgado
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
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234
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Feng X, Hong X, Fan Q, Chen L, Li J, Deng J, Gong S, Hou FF, Zhang F. dCubilin- or dAMN-mediated protein reabsorption in Drosophila nephrocytes modulates longevity. Dis Model Mech 2021; 14:271950. [PMID: 34437681 PMCID: PMC8476815 DOI: 10.1242/dmm.047464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 08/16/2021] [Indexed: 11/20/2022] Open
Abstract
Aging is a multifaceted process regulated by multiple cellular pathways, including the proteostasis network. Pharmacological or genetic enhancement of the intracellular proteostasis network extends lifespan and prevents age-related diseases. However, how proteostasis is regulated in different tissues throughout the aging process remains unclear. Here, we show that Drosophila homologs of Cubilin- and Amnionless (dCubilin and dAMN, respectively)-mediated protein reabsorption (CAMPR) from hemolymph insect blood by nephrocytes modulate longevity through regulating proteostasis in muscle and brain tissues. We find that overexpression of dAMN receptor in nephrocytes extends lifespan, whereas nephrocyte-specific dCubilin or dAMN RNAi knockdown shortens lifespan. We also show that CAMPR in nephrocytes regulates proteostasis in hemolymph and improves healthspan. In addition, we show that enhanced CAMPR in nephrocytes slows down the aging process in muscle and brain by maintaining the proteostasis network in these tissues. Altogether, our work has revealed an inter-organ communication network across nephrocytes and muscle/neuronal tissue that is essential for maintaining proteostasis, and to delay senescence in these organs. These findings provide insight into the role of renal protein reabsorption in the aging process via this tele-proteostasis network. Summary: dCubilin- or dAMN-mediated protein reabsorption in nephrocytes from hemolymph modulates Drosophila lifespan through regulating proteostasis and aging in muscle and brain tissues via the tele-proteostasis mechanism.
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Affiliation(s)
- Xiaoming Feng
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,North China University of Science and Technology Affiliated Hospital, Tangshan, Hebei 063000, China
| | - Xizhen Hong
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Qiuxia Fan
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, China
| | - Liting Chen
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Jing Li
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Juan Deng
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Siqiao Gong
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Fan Fan Hou
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou 510320, China
| | - Fujian Zhang
- State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Diseases, Division of Nephrology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.,Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou 510320, China
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235
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Derisbourg MJ, Hartman MD, Denzel MS. Perspective: Modulating the integrated stress response to slow aging and ameliorate age-related pathology. NATURE AGING 2021; 1:760-768. [PMID: 35146440 PMCID: PMC7612338 DOI: 10.1038/s43587-021-00112-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 08/05/2021] [Indexed: 12/19/2022]
Abstract
Healthy aging requires the coordination of numerous stress signaling pathways that converge on the protein homeostasis network. The Integrated Stress Response (ISR) is activated by diverse stimuli, leading to phosphorylation of the eukaryotic translation initiation factor elF2 in its α-subunit. Under replete conditions, elF2 orchestrates 5' cap-dependent mRNA translation and is thus responsible for general protein synthesis. elF2α phosphorylation, the key event of the ISR, reduces global mRNA translation while enhancing the expression of a signature set of stress response genes. Despite the critical role of protein quality control in healthy aging and in numerous longevity pathways, the role of the ISR in longevity remains largely unexplored. ISR activity increases with age, suggesting a potential link with the aging process. Although decreased protein biosynthesis, which occurs during ISR activation, have been linked to lifespan extension, recent data show that lifespan is limited by the ISR as its inhibition extends survival in nematodes and enhances cognitive function in aged mice. Here we survey how aging affects the ISR, the role of the ISR in modulating aging, and pharmacological interventions to tune the ISR. Finally, we will explore the ISR as a plausible target for clinical interventions in aging and age-related disease.
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Affiliation(s)
| | | | - Martin S Denzel
- Max Planck Institute for Biology of Ageing, Cologne, Germany.
- CECAD - Cluster of Excellence, University of Cologne, Cologne, Germany.
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany.
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236
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Sierra-Fonseca JA, Hamdan JN, Cohen AA, Cardenas SM, Saucedo S, Lodoza GA, Gosselink KL. Neonatal Maternal Separation Modifies Proteostasis Marker Expression in the Adult Hippocampus. Front Mol Neurosci 2021; 14:661993. [PMID: 34447296 PMCID: PMC8383781 DOI: 10.3389/fnmol.2021.661993] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 07/05/2021] [Indexed: 01/01/2023] Open
Abstract
Exposure to early-life stress (ELS) can persistently modify neuronal circuits and functions, and contribute to the expression of misfolded and aggregated proteins that are hallmarks of several neurodegenerative diseases. The healthy brain is able to clear dysfunctional proteins through the ubiquitin-proteasome system (UPS) and the autophagy-lysosomal pathway (ALP). Accumulating evidence indicates that impairment of these pathways contributes to enhanced protein aggregation and neurodegeneration. While stress is a known precipitant of neurological decline, few specific mechanistic links underlying this relationship have been identified. We hypothesized that neonatal maternal separation (MatSep), a well-established model of ELS, has the ability to alter the levels of UPS and ALP components in the brain, and thus has the potential to disrupt proteostasis. The expression of proteostasis-associated protein markers was evaluated by immunoblotting in the hippocampus and cortex of adult Wistar rats that were previously subjected to MatSep. We observed multiple sex- and MatSep-specific changes in the expression of proteins in the ALP, mitophagy, and UPS pathways, particularly in the hippocampus of adult animals. In contrast, MatSep had limited influence on proteostasis marker expression in the cortex of adult animals. Our results indicate that MatSep can selectively modify the intracellular protein degradation machinery in ways that may impact the development and progression of neurodegenerative disease.
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Affiliation(s)
- Jorge A Sierra-Fonseca
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States
| | - Jameel N Hamdan
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States
| | - Alexis A Cohen
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States.,Neuroscience Program, Smith College, Northampton, MA, United States
| | - Sonia M Cardenas
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States
| | - Sigifredo Saucedo
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States
| | - Gabriel A Lodoza
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States
| | - Kristin L Gosselink
- Department of Biological Sciences and Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX, United States.,Department of Physiology and Pathology, Burrell College of Osteopathic Medicine, Las Cruces, NM, United States
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237
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Gonçalves CC, Sharon I, Schmeing TM, Ramos CHI, Young JC. The chaperone HSPB1 prepares protein aggregates for resolubilization by HSP70. Sci Rep 2021; 11:17139. [PMID: 34429462 PMCID: PMC8384840 DOI: 10.1038/s41598-021-96518-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 08/11/2021] [Indexed: 01/22/2023] Open
Abstract
In human cells under stress conditions, misfolded polypeptides can form potentially cytotoxic insoluble aggregates. To eliminate aggregates, the HSP70 chaperone machinery extracts and resolubilizes polypeptides for triage to refolding or degradation. Yeast and bacterial chaperones of the small heat-shock protein (sHSP) family can bind substrates at early stages of misfolding, during the aggregation process. The co-aggregated sHSPs then facilitate downstream disaggregation by HSP70. Because it is unknown whether a human sHSP has this activity, we investigated the disaggregation role of human HSPB1. HSPB1 co-aggregated with unfolded protein substrates, firefly luciferase and mammalian lactate dehydrogenase. The co-aggregates formed with HSPB1 were smaller and more regularly shaped than those formed in its absence. Importantly, co-aggregation promoted the efficient disaggregation and refolding of the substrates, led by HSP70. HSPB1 itself was also extracted during disaggregation, and its homo-oligomerization ability was not required. Therefore, we propose that a human sHSP is an integral part of the chaperone network for protein disaggregation.
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Affiliation(s)
- Conrado C Gonçalves
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Room 900, Montreal, QC, H3G 1Y6, Canada
| | - Itai Sharon
- Department of Biochemistry, McGill University, 3649 Promenade Sir William Osler, Room 457, Montreal, QC, H3G 0B1, Canada
| | - T Martin Schmeing
- Department of Biochemistry, McGill University, 3649 Promenade Sir William Osler, Room 457, Montreal, QC, H3G 0B1, Canada
| | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas (UNICAMP), Campinas, SP, 13083-970, Brazil
| | - Jason C Young
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Room 900, Montreal, QC, H3G 1Y6, Canada.
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238
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Sierra-Fonseca JA, Rodriguez M, Themann A, Lira O, Flores-Ramirez FJ, Vargas-Medrano J, Gadad BS, Iñiguez SD. Autophagy Induction and Accumulation of Phosphorylated Tau in the Hippocampus and Prefrontal Cortex of Adult C57BL/6 Mice Subjected to Adolescent Fluoxetine Treatment. J Alzheimers Dis 2021; 83:1691-1702. [PMID: 34420960 DOI: 10.3233/jad-210475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND Fluoxetine (FLX) represents the antidepressant of choice for the management of pediatric mood-related illnesses. Accumulating preclinical evidence suggests that ontogenic FLX exposure leads to deregulated affect-related phenotypes in adulthood. Mood-related symptomatology constitutes a risk-factor for various neurological disorders, including Alzheimer's disease (AD), making it possible for juvenile FLX history to exacerbate the development of neurodegenerative diseases. OBJECTIVE Because AD is characterized by the pathological accumulation of hyperphosphorylated tau, which can result from impaired function of protein degradation pathways, such as autophagy and the ubiquitin-proteasome system (UPS), we evaluated the long-term effects of adolescent FLX exposure on these pathways, using mice as a model system. METHODS We subjected C57BL/6 adolescent male mice to FLX (20 mg/kg/day) from postnatal day (PD) 35 to PD49. Twenty-one days after the last FLX injection (i.e., adulthood; PD70), mice were euthanized and, using immunoblotting analysis, we evaluated protein markers of autophagy (Beclin-1, LC3-II, p62) and the UPS (K48-pUb), as well as AD-associated forms of phosphorylated tau, within the hippocampus and prefrontal cortex. RESULTS Juvenile FLX pre-exposure mediated long-term changes in the expression of protein markers (increased LC3-II and decreased p62) that is consistent with autophagy activation, particularly in the prefrontal cortex. Furthermore, FLX history induced persistent accumulation of AD-associated variants of tau in both the hippocampus and prefrontal cortexConclusion: Adolescent FLX treatment may have enduring effects in the neuronal protein degradation machinery, which could adversely influence clearance of abnormal proteins, potentially predisposing individuals to developing AD in later life.
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Affiliation(s)
| | - Minerva Rodriguez
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, USA
| | - Anapaula Themann
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, USA
| | - Omar Lira
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, USA
| | | | - Javier Vargas-Medrano
- Department of Psychiatry, Paul L. Foster School of Medicine, Texas Tech University Health Science Center, El Paso, TX, USA
| | - Bharathi S Gadad
- Department of Psychiatry, Paul L. Foster School of Medicine, Texas Tech University Health Science Center, El Paso, TX, USA
| | - Sergio D Iñiguez
- Department of Psychology, The University of Texas at El Paso, El Paso, TX, USA
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239
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Narayan V, McMahon M, O'Brien JJ, McAllister F, Buffenstein R. Insights into the Molecular Basis of Genome Stability and Pristine Proteostasis in Naked Mole-Rats. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1319:287-314. [PMID: 34424521 DOI: 10.1007/978-3-030-65943-1_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The naked mole-rat (Heterocephalus glaber) is the longest-lived rodent, with a maximal reported lifespan of 37 years. In addition to its long lifespan - which is much greater than predicted based on its small body size (longevity quotient of ~4.2) - naked mole-rats are also remarkably healthy well into old age. This is reflected in a striking resistance to tumorigenesis and minimal declines in cardiovascular, neurological and reproductive function in older animals. Over the past two decades, researchers have been investigating the molecular mechanisms regulating the extended life- and health- span of this animal, and since the sequencing and assembly of the naked mole-rat genome in 2011, progress has been rapid. Here, we summarize findings from published studies exploring the unique molecular biology of the naked mole-rat, with a focus on mechanisms and pathways contributing to genome stability and maintenance of proteostasis during aging. We also present new data from our laboratory relevant to the topic and discuss our findings in the context of the published literature.
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Affiliation(s)
| | - Mary McMahon
- Calico Life Sciences, LLC, South San Francisco, CA, USA
| | | | | | - Rochelle Buffenstein
- Calico Life Sciences, LLC, South San Francisco, CA, USA. .,Department of Pharmacology, University of Texas Health at San Antonio, San Antonio, TX, USA.
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240
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Tong Y, Mukhamejanova Z, Zheng Y, Wen T, Xu F, Pang J. Marine-Derived Xyloketal Compound Ameliorates MPP +-Induced Neuronal Injury through Regulating of the IRE1/XBP1 Signaling Pathway. ACS Chem Neurosci 2021; 12:3101-3111. [PMID: 34338497 DOI: 10.1021/acschemneuro.1c00362] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The IRE1/XBP1 signaling pathway is the most conserved component of the endoplasmic reticulum unfolded protein response (UPRER). Activating this branch to correct defects in ER proteostasis is regarded as a promising anti-Parkinson's disease (PD) strategy. P-53 is a marine-derived xyloketal B analog which exhibited potential neuroprotective activities in previous research studies; however, the molecular mechanism underneath its protective effect remains unknown. Herein, a transcriptomic approach was introduced to explore the protective mechanism of P-53. RNA microarray profiling was conducted based on an MPP+-induced C. elegans PD model, and bioinformatics analyses including GO enrichment and PPI network analysis were subsequently performed. In particular, the recovery of the impaired UPRER was highlighted as a main physiological change caused by P-53, and a cluster of genes including abu and hsp family genes which are involved in the IRE1/XBP1 branch of the UPRER were identified as the key genes related to its neuroprotective effect. The transcription levels of these key genes were validated by RT-qPCR assays. Further results showed that P-53 enhanced the phosphorylation of IRE1, the splicing of xbp-1 mRNA, and the translation of XBP1S and boosted the expression level of the downstream targets of the IRE1/XBP1 signaling pathway. Moreover, it was also demonstrated that P-53 accelerated the scavenging of misfolded α-synuclein and attenuated the correlative mitochondrial dysfunction. Finally, the protective effect of P-53 against MPP+-induced dopaminergic neuronal loss was assessed. Taken together, these results revealed that P-53 plays its neuroprotective role through regulating of the IRE1/XBP1 signaling pathway and laid the foundation for its further development as an ER proteostasis-regulating agent.
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Affiliation(s)
- Yichen Tong
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | | | - Yinglin Zheng
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Tianzhi Wen
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
| | - Fang Xu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE), Guangzhou City Key Laboratory of Precision Chemical Drug Development, School of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Jiyan Pang
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China
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241
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Oliveira D, Morales-Vicente DA, Amaral MS, Luz L, Sertié AL, Leite FS, Navarro C, Kaid C, Esposito J, Goulart E, Caires L, Alves LM, Melo US, Figueiredo T, Mitne-Neto M, Okamoto OK, Verjovski-Almeida S, Zatz M. Different gene expression profiles in iPSC-derived motor neurons from ALS8 patients with variable clinical courses suggest mitigating pathways for neurodegeneration. Hum Mol Genet 2021; 29:1465-1475. [PMID: 32280986 DOI: 10.1093/hmg/ddaa069] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 04/04/2020] [Accepted: 04/09/2020] [Indexed: 12/14/2022] Open
Abstract
Amyotrophic lateral sclerosis type 8 (ALS8) is an autosomal dominant form of ALS, which is caused by pathogenic variants in the VAPB gene. Here we investigated five ALS8 patients, classified as 'severe' and 'mild' from a gigantic Brazilian kindred, carrying the same VAPB mutation but displaying different clinical courses. Copy number variation and whole exome sequencing analyses in such individuals ruled out previously described genetic modifiers of pathogenicity. After deriving induced pluripotent stem cells (iPSCs) for each patient (N = 5) and controls (N = 3), motor neurons were differentiated, and high-throughput RNA-Seq gene expression measurements were performed. Functional cell death and oxidative metabolism assays were also carried out in patients' iPSC-derived motor neurons. The degree of cell death and mitochondrial oxidative metabolism were similar in iPSC-derived motor neurons from mild patients and controls and were distinct from those of severe patients. Similar findings were obtained when RNA-Seq from such cells was performed. Overall, 43 genes were upregulated and 66 downregulated in the two mild ALS8 patients when compared with severe ALS8 individuals and controls. Interestingly, significantly enriched pathways found among differentially expressed genes, such as protein translation and protein targeting to the endoplasmic reticulum (ER), are known to be associated with neurodegenerative processes. Taken together, the mitigating mechanisms here presented appear to maintain motor neuron survival by keeping translational activity and protein targeting to the ER in such cells. As ALS8 physiopathology has been associated with proteostasis mechanisms in ER-mitochondria contact sites, such differentially expressed genes appear to relate to the bypass of VAPB deficiency.
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Affiliation(s)
- Danyllo Oliveira
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - David A Morales-Vicente
- Laboratory of Gene Expression in Eukaryotes, Instituto Butantan, São Paulo 05503-900, Brazil.,Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-000, Brazil
| | - Murilo S Amaral
- Laboratory of Gene Expression in Eukaryotes, Instituto Butantan, São Paulo 05503-900, Brazil
| | - Livia Luz
- Laboratory of DNA Repair, Institute of Biomedical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | | | - Felipe S Leite
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Claudia Navarro
- Department of Clinical Pathology, Faculty of Medical Sciences, University of Campinas, Campinas 13083-887, Brazil
| | - Carolini Kaid
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Joyce Esposito
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Ernesto Goulart
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Luiz Caires
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Luciana M Alves
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Uirá S Melo
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Thalita Figueiredo
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil.,Faculty of Medicine, Federal University of Alagoas, Maceió 57972-900, Brazil
| | - Miguel Mitne-Neto
- Fleury Group, Research and Development. São Paulo, São Paulo 04344-070, Brazil
| | - Oswaldo K Okamoto
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - Sergio Verjovski-Almeida
- Laboratory of Gene Expression in Eukaryotes, Instituto Butantan, São Paulo 05503-900, Brazil.,Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-000, Brazil
| | - Mayana Zatz
- Department of Genetics and Evolutionary Biology, Human Genome and Stem Cell Research Center, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
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242
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Ramasamy TS, Yee YM, Khan IM. Chondrocyte Aging: The Molecular Determinants and Therapeutic Opportunities. Front Cell Dev Biol 2021; 9:625497. [PMID: 34336816 PMCID: PMC8318388 DOI: 10.3389/fcell.2021.625497] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 04/28/2021] [Indexed: 12/17/2022] Open
Abstract
Osteoarthritis (OA) is a joint degenerative disease that is an exceedingly common problem associated with aging. Aging is the principal risk factor for OA, but damage-related physiopathology of articular chondrocytes probably drives the mechanisms of joint degeneration by a progressive decline in the homeostatic and regenerative capacity of cells. Cellular aging is the manifestation of a complex interplay of cellular and molecular pathways underpinned by transcriptional, translational, and epigenetic mechanisms and niche factors, and unraveling this complexity will improve our understanding of underlying molecular changes that affect the ability of the articular cartilage to maintain or regenerate itself. This insight is imperative for developing new cell and drug therapies for OA disease that will target the specific causes of age-related functional decline. This review explores the key age-related changes within articular chondrocytes and discusses the molecular mechanisms that are commonly perturbed as cartilage ages and degenerates. Current efforts and emerging potential therapies in treating OA that are being employed to halt or decelerate the aging processes are also discussed.
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Affiliation(s)
- Thamil Selvee Ramasamy
- Stem Cell Biology Laboratory, Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia.,Cell and Molecular Biology Laboratory, The Dean's Office, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Yong Mei Yee
- Stem Cell Biology Laboratory, Department of Molecular Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Ilyas M Khan
- Centre of NanoHealth, Swansea University Medical School, Swansea, United Kingdom
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de Castro Fonseca M, de Oliveira JF, Araujo BHS, Canateli C, do Prado PFV, Amorim Neto DP, Bosque BP, Rodrigues PV, de Godoy JVP, Tostes K, Filho HVR, Nascimento AFZ, Saito A, Tonoli CCC, Batista FAH, de Oliveira PSL, Figueira AC, Souza da Costa S, Krepischi ACV, Rosenberg C, Westfahl H, da Silva AJR, Franchini KG. Molecular and cellular basis of hyperassembly and protein aggregation driven by a rare pathogenic mutation in DDX3X. iScience 2021; 24:102841. [PMID: 34381968 PMCID: PMC8335631 DOI: 10.1016/j.isci.2021.102841] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 05/21/2021] [Accepted: 07/08/2021] [Indexed: 12/30/2022] Open
Abstract
Current studies estimate that 1–3% of females with unexplained intellectual disability (ID) present de novo splice site, nonsense, frameshift, or missense mutations in the DDX3X protein (DEAD-Box Helicase 3 X-Linked). However, the cellular and molecular mechanisms by which DDX3X mutations impair brain development are not fully comprehended. Here, we show that the ID-linked missense mutation L556S renders DDX3X prone to aggregation. By using a combination of biophysical assays and imaging approaches, we demonstrate that this mutant assembles solid-like condensates and amyloid-like fibrils. Although we observed greatly reduced expression of the mutant allele in a patient who exhibits skewed X inactivation, this appears to be enough to sequestrate healthy proteins into solid-like ectopic granules, compromising cell function. Therefore, our data suggest ID-linked DDX3X L556S mutation as a disorder arising from protein misfolding and aggregation. DDX3X mutations skew X-inactivation and are found in 1-3% of unexplained ID in females DDX3X mutant proteins assemble solid-like condensates and amyloid-like fibrils Aberrant granules formed by DDX3X mutants sequestrate healthy DDX3X protein ID-linked DDX3X L556S mutation decreases cell viability and induces apoptosis
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Affiliation(s)
- Matheus de Castro Fonseca
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Juliana Ferreira de Oliveira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Bruno Henrique Silva Araujo
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Camila Canateli
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Paula Favoretti Vital do Prado
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Dionísio Pedro Amorim Neto
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Beatriz Pelegrini Bosque
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Paulla Vieira Rodrigues
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - João Vitor Pereira de Godoy
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Structural and Functional Biology, State University of Campinas, Campinas, Brazil
| | - Katiane Tostes
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Helder Veras Ribeiro Filho
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Andrey Fabricio Ziem Nascimento
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Angela Saito
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Celisa Caldana Costa Tonoli
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Fernanda Aparecida Heleno Batista
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Paulo Sergio Lopes de Oliveira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Ana Carolina Figueira
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil
| | - Silvia Souza da Costa
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Ana Cristina Victorino Krepischi
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Carla Rosenberg
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Harry Westfahl
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Antônio José Roque da Silva
- Brazilian Synchrotron Light National Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Kleber Gomes Franchini
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM), 10000 Giuseppe Maximo Scolfaro St., Campinas, São Paulo 13083-100, Brazil.,Department of Internal Medicine, School of Medicine, University of Campinas, Campinas, Brazil
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244
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Brown JL, Lawrence MM, Borowik A, Oliver L, Peelor FF, Van Remmen H, Miller BF. Tumor burden negatively impacts protein turnover as a proteostatic process in noncancerous liver, heart, and muscle, but not brain. J Appl Physiol (1985) 2021; 131:72-82. [PMID: 34013745 PMCID: PMC8325617 DOI: 10.1152/japplphysiol.01026.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/28/2021] [Accepted: 05/17/2021] [Indexed: 12/24/2022] Open
Abstract
Cancer survivors are more susceptible to pathologies such as hypertension, liver disease, depression, and coronary artery disease when compared with individuals who have never been diagnosed with cancer. Therefore, it is important to understand how tumor burden negatively impacts nontumor-bearing tissues that may impact future disease susceptibility. We hypothesized that the energetic costs of a tumor would compromise proteostatic maintenance in other tissues. Therefore, the purpose of this study was to determine if tumor burden changes protein synthesis and proliferation rates in heart, brain, and liver. One million Lewis lung carcinoma (LLC) cells or phosphate-buffered saline (PBS, sham) were injected into the hind flank of female mice at ∼4.5 mo of age, and the tumor developed for 3 wk. Rates of proliferation and protein synthesis were measured in heart, brain, liver, and tumor tissue. Compared with sham, rates of protein synthesis (structural/nuclear, cytosolic, mitochondrial, and collagen) relative to proliferation were lower in the heart and liver of LLC mice, but higher in the brain of LLC mice. In the tumor tissue, the ratio of protein synthesis to DNA synthesis was approximately 1.0 showing that protein synthesis in the tumor was used for proliferation with little proteostatic maintenance. We further provide evidence that the differences in tissue responses may be due to energetic stress. We concluded that the decrease in proteostatic maintenance in liver, heart, and muscle might contribute to the increased risk of disease in cancer survivors.NEW & NOTEWORTHY We present data showing that simultaneously measuring protein synthesis and cell proliferation can help in the understanding of protein turnover as a proteostatic process in response to tumor burden. In some tissues, like hepatic, cardiac, and skeletal muscle, there was a decrease in the protein to DNA synthesis ratio indicating less proteostatic maintenance. In contrast, the brain maintained or even increased this protein to DNA synthesis ratio indicating more proteostatic maintenance.
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Affiliation(s)
- Jacob L Brown
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Marcus M Lawrence
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
- Department of Kinesiology and Outdoor Recreation, Southern Utah University, Cedar City, Utah
| | - Agnieszka Borowik
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Lauren Oliver
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
- Oklahoma University Health Science Center, Oklahoma City, Oklahoma
| | - Fredrick F Peelor
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
| | - Holly Van Remmen
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
- Oklahoma City VA Medical Center, Oklahoma City, Oklahoma
| | - Benjamin F Miller
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
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245
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Dores-Silva PR, Cauvi DM, Coto ALS, Silva NSM, Borges JC, De Maio A. Human heat shock cognate protein (HSC70/HSPA8) interacts with negatively charged phospholipids by a different mechanism than other HSP70s and brings HSP90 into membranes. Cell Stress Chaperones 2021; 26:671-684. [PMID: 34003451 PMCID: PMC8129608 DOI: 10.1007/s12192-021-01210-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/28/2021] [Accepted: 05/01/2021] [Indexed: 12/15/2022] Open
Abstract
Heat shock proteins (HSP) are critical elements for the preservation of cellular homeostasis by participating in an array of biological processes. In addition, HSP play an important role in cellular protection from various environmental stresses. HSP are part of a large family of different molecular mass polypeptides, displaying various expression patterns, subcellular localizations, and diversity functions. An unexpected observation was the detection of HSP on the cell surface. Subsequent studies have demonstrated that HSP have the ability to interact and penetrate lipid bilayers by a process initiated by the recognition of phospholipid heads, followed by conformational changes, membrane insertion, and oligomerization. In the present study, we described the interaction of HSPA8 (HSC70), the constitutive cytosolic member of the HSP70 family, with lipid membranes. HSPA8 showed high selectivity for negatively charged phospholipids, such as phosphatidylserine and cardiolipin, and low affinity for phosphatidylcholine. Membrane insertion was mediated by a spontaneous process driven by increases in entropy and diminished by the presence of ADP or ATP. Finally, HSPA8 was capable of driving into the lipid bilayer HSP90 that does not display any lipid biding capacity by itself. This observation suggests that HSPA8 may act as a membrane chaperone.
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Affiliation(s)
- Paulo R Dores-Silva
- Department of Surgery, School of Medicine, Division of Trauma, Critical Care, Burns and Acute Care Surgery, University of California, San Diego, La Jolla, CA, 92093, USA
- São Carlos Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - David M Cauvi
- Department of Surgery, School of Medicine, Division of Trauma, Critical Care, Burns and Acute Care Surgery, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Amanda L S Coto
- São Carlos Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Noeli S M Silva
- São Carlos Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Júlio C Borges
- São Carlos Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Antonio De Maio
- Department of Surgery, School of Medicine, Division of Trauma, Critical Care, Burns and Acute Care Surgery, University of California, San Diego, La Jolla, CA, 92093, USA.
- Department of Neurosciences, School of Medicine, University of California San Diego, La Jolla, CA, 92093, USA.
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246
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1,4-dihydropyridine derivatives increase mRNA expression of Psma3, Psmb5, and Psmc6 in rats. ACTA ACUST UNITED AC 2021; 72:148-156. [PMID: 34187104 PMCID: PMC8265202 DOI: 10.2478/aiht-2021-72-3422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/01/2021] [Indexed: 11/21/2022]
Abstract
The ubiquitin-proteasome system modifies different cellular and protein functions. Its dysregulation may lead to disrupted proteostasis associated with multiple pathologies and aging. Pharmacological regulation of proteasome functions is already an important part of the treatment of several diseases. 1,4-dihydropyridine (1,4-DHP) derivatives possess different pharmacological activities, including antiaging and neuroprotective. The aim of this study was to investigate the effects of several 1,4-DHP derivatives on mRNA expression levels of proteasomal genes Psma3, Psmb5, and Psmc6 in several organs of rats. Rats were treated with metcarbatone, etcarbatone, glutapyrone, styrylcarbatone, AV-153-Na, or AV-153-Ca per os for three days. mRNA expression levels were determined with real-time polymerase chain reaction (PCR). For AV-153-Na and AV-153-Ca, we also determined the expression of the Psma6 gene. In the kidney, metcarbatone, etcarbatone, styrylcarbatone, and AV-153-Na increased the expression of all analysed genes. Glutapyrone increased the expression of Psmb5 and Psmc6 but did not affect the expression of Psma3. In the blood, glutapyrone increased Psmb5 expression. In the liver, AV-153-Na increased the expression of Psma6 and Psmc6 but lowered the expression of Psmb5, while AV-153-Ca only increased Psma6 expression. The ability of 1,4-DHP derivatives to increase the expression of proteasome subunit genes might hold a therapeutic potential in conditions associated with impaired proteasomal functions, but further research is needed.
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247
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Kovács Z, Brunner B, Ari C. Beneficial Effects of Exogenous Ketogenic Supplements on Aging Processes and Age-Related Neurodegenerative Diseases. Nutrients 2021; 13:nu13072197. [PMID: 34206738 PMCID: PMC8308443 DOI: 10.3390/nu13072197] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 12/20/2022] Open
Abstract
Life expectancy of humans has increased continuously up to the present days, but their health status (healthspan) was not enhanced by similar extent. To decrease enormous medical, economical and psychological burden that arise from this discrepancy, improvement of healthspan is needed that leads to delaying both aging processes and development of age-related diseases, thereby extending lifespan. Thus, development of new therapeutic tools to alleviate aging processes and related diseases and to increase life expectancy is a topic of increasing interest. It is widely accepted that ketosis (increased blood ketone body levels, e.g., β-hydroxybutyrate) can generate neuroprotective effects. Ketosis-evoked neuroprotective effects may lead to improvement in health status and delay both aging and the development of related diseases through improving mitochondrial function, antioxidant and anti-inflammatory effects, histone and non-histone acetylation, β-hydroxybutyrylation of histones, modulation of neurotransmitter systems and RNA functions. Administration of exogenous ketogenic supplements was proven to be an effective method to induce and maintain a healthy state of nutritional ketosis. Consequently, exogenous ketogenic supplements, such as ketone salts and ketone esters, may mitigate aging processes, delay the onset of age-associated diseases and extend lifespan through ketosis. The aim of this review is to summarize the main hallmarks of aging processes and certain signaling pathways in association with (putative) beneficial influences of exogenous ketogenic supplements-evoked ketosis on lifespan, aging processes, the most common age-related neurodegenerative diseases (Alzheimer’s disease, Parkinson’s disease and amyotrophic lateral sclerosis), as well as impaired learning and memory functions.
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Affiliation(s)
- Zsolt Kovács
- Department of Biology, Savaria University Centre, ELTE Eötvös Loránd University, Károlyi Gáspár tér 4., 9700 Szombathely, Hungary; (Z.K.); (B.B.)
| | - Brigitta Brunner
- Department of Biology, Savaria University Centre, ELTE Eötvös Loránd University, Károlyi Gáspár tér 4., 9700 Szombathely, Hungary; (Z.K.); (B.B.)
- Faculty of Sciences, Institute of Biology, University of Pécs, Ifjúság Str. 6, 7624 Pécs, Hungary
| | - Csilla Ari
- Behavioral Neuroscience Research Laboratory, Department of Psychology, University of South Florida, 4202 E. Fowler Ave, PCD 3127, Tampa, FL 33620, USA
- Ketone Technologies LLC, 2780 E. Fowler Ave. #226, Tampa, FL 33612, USA
- Correspondence: ; Tel.: +1-(813)-2409925
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248
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Barghout SH. Targeted Protein Degradation: An Emerging Therapeutic Strategy in Cancer. Anticancer Agents Med Chem 2021; 21:214-230. [PMID: 32275492 DOI: 10.2174/1871520620666200410082652] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/20/2020] [Accepted: 02/19/2020] [Indexed: 11/22/2022]
Abstract
Drug discovery in the scope of cancer therapy has been focused on conventional agents that nonselectively induce DNA damage or selectively inhibit the activity of key oncogenic molecules without affecting their protein levels. An emerging therapeutic strategy that garnered attention in recent years is the induction of Targeted Protein Degradation (TPD) of cellular targets by hijacking the intracellular proteolysis machinery. This novel approach offers several advantages over conventional inhibitors and introduces a paradigm shift in several pharmacological aspects of drug therapy. While TPD has been found to be the major mode of action of clinically approved anticancer agents such as fulvestrant and thalidomide, recent years have witnessed systematic endeavors to expand the repertoire of proteins amenable to therapeutic ablation by TPD. Such endeavors have led to three major classes of agents that induce protein degradation, including molecular glues, Proteolysis Targeting Chimeras (PROTACs) and Hydrophobic Tag (HyT)-based degraders. Here, we briefly highlight agents in these classes and key advances made in the field with a focus on clinical translation in cancer therapy.
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Affiliation(s)
- Samir H Barghout
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tanta University, Tanta, Egypt
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249
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Zhang H, Guo Z, Guo Y, Wang Z, Tang Y, Song T, Zhang Z. Bim transfer between Bcl-2-like protein and Hsp70 underlines Bcl-2/Hsp70 crosstalk to regulate apoptosis. Biochem Pharmacol 2021; 190:114660. [PMID: 34153292 DOI: 10.1016/j.bcp.2021.114660] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/29/2021] [Accepted: 06/16/2021] [Indexed: 10/21/2022]
Abstract
The chaperone heat shock protein 70 (Hsp70) is crucial for avoiding protein misfolding under stress, but it is also upregulated in many kinds of cancers, where its ability to buffer cellular stress prevents apoptosis. Previous research has suggested that Bim, a BH3-only member of the Bcl-2 family proteins, also serves as a cochaperone for Hsp70, which modulates the folding and stabilization of many Hsp70 oncogenic substrates in tumor cells. However, a definitive demonstration of crosstalk between Bcl-2 and Hsp70 family proteins and molecular mechanism remain unclear. Herein, we examined the effects of pan-Bcl-2 inhibitor S1, Hsp70 inhibitor S1g-6 on the K562, U937, H23, HL-60 cell lines and these inhibitors synergistically induce mitochondrial apoptosis in cancer cell lines. Moreover, we identified that Bim transfer between Bcl-2-like protein and Hsp70 underlines Bcl-2/Hsp70 crosstalk in mitochondrial apoptosis pathway. Thus, the synergy of S1 and S1g-6 to induce a panel of cancer cell lines apoptosis by inhibiting free Bim and facilitating oncogenic client AKT folding and activation. Together, our results demonstrated the combination of Bcl-2 inhibitor and Hsp70 inhibitor showed synergistic effect in cancer cells and the potential to decrease tumor regression.
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Affiliation(s)
- Hong Zhang
- State Key Laboratory of Fine Chemicals, School of Life Science and Technology, Dalian University of Technology, Dalian, Liaoning, China
| | - Zongwei Guo
- State Key Laboratory of Fine Chemicals, School of Life Science and Technology, Dalian University of Technology, Dalian, Liaoning, China
| | - Yafei Guo
- State Key Laboratory of Fine Chemicals, School of Life Science and Technology, Dalian University of Technology, Dalian, Liaoning, China
| | - Ziqian Wang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China
| | - Yao Tang
- State Key Laboratory of Fine Chemicals, School of Life Science and Technology, Dalian University of Technology, Dalian, Liaoning, China
| | - Ting Song
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China.
| | - Zhichao Zhang
- State Key Laboratory of Fine Chemicals, Zhang Dayu School of Chemistry, Dalian University of Technology, Dalian, Liaoning, China.
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250
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Reversible protein aggregation as cytoprotective mechanism against heat stress. Curr Genet 2021; 67:849-855. [PMID: 34091720 PMCID: PMC8592950 DOI: 10.1007/s00294-021-01191-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/24/2021] [Accepted: 04/27/2021] [Indexed: 01/01/2023]
Abstract
Temperature fluctuation is one of the most frequent threats to which organisms are exposed in nature. The activation of gene expression programs that trigger the transcription of heat stress-protective genes is the main cellular response to resist high temperatures. In addition, reversible accumulation and compartmentalization of thermosensitive proteins in high-order molecular assemblies are emerging as critical mechanisms to ensure cellular protection upon heat stress. Here, we summarize representative examples of membrane-less intracellular bodies formed upon heat stress in yeasts and human cells and highlight how protein aggregation can be turned into a cytoprotective mechanism.
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