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Wojciuk B, Bogucka A, Czaplewska P, Okulewicz P, Wojciechowska‐Koszko I, Ciechanowski K, Kabat‐Koperska J. Proteomic study on the lymphocytes from pregnant Wistar rat females treated with immunosuppressive regimen. Clin Transl Sci 2022; 16:118-127. [PMID: 36366854 PMCID: PMC9841302 DOI: 10.1111/cts.13432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 09/15/2022] [Accepted: 09/17/2022] [Indexed: 11/13/2022] Open
Abstract
Kidney transplantation remains the therapeutic option for patients with end-stage kidney disease. Current immunosuppressive regimens are efficient in combating acute kidney rejection. However, insights into chronic kidney allograft injury remains limited. Simultaneously, pregnancy is more common after kidney transplantation than during dialysis treatment. Due to ethical issues, comprehensive studies on the impact of immunosuppressive regimens on pregnancy are challenging. The study aimed to investigate the proteomic status of lymphocytes obtained from pregnant female rats under immunosuppressive treatment. The experiment involved a group of 10 female, pregnant Wistar rats, five of which were treated with tacrolimus, mofetil mycophenolate, and glucocorticosteroids; five were used as control. The lymphocytes were obtained and analyzed with mass spectrometry. Measurements were processed by a database search in the ProteinPilot software with a cutoff of 1% false discovery rate. The outcomes were verified statistically by a t-test (p value < 0.05) regarding proteins up- and downregulation. A total of 2082 proteins were identified in all experiments. Eight hundred five proteins were quantified in an absolute manner in a data-independent acquisition-total protein approach analysis. Ninety-five proteins were recognized as present at different concentrations in analyzed groups and were annotated to intracellular pathways. The proteins involved in nonsense-mediated decay and L13a-mediated translational silencing of ceruloplasmin expression were recognized as downregulated. The set of proteins clinically identified as acute phase proteins was upregulated. Despite the blockade of adaptive cellular immunity, the lymphocytes in the analyzed group reveal sustained proinflammatory status with decreased ability to regulate translation. This potentially affects pregnancy and immunity.
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Affiliation(s)
- Bartosz Wojciuk
- Department of Diagnostic ImmunologyPomeranian Medical University in SzczecinSzczecinPoland
| | - Aleksandra Bogucka
- Laboratory of Biopolymers Structure, Intercollegiate Faculty of BiotechnologyMedical University of Gdańsk and University of GdańskGdańskPoland
| | - Paulina Czaplewska
- Laboratory of Mass Spectrometry, Intercollegiate Faculty of BiotechnologyMedical University of Gdańsk and University of GdańskGdańskPoland
| | - Patrycja Okulewicz
- Department of Diagnostic ImmunologyPomeranian Medical University in SzczecinSzczecinPoland
| | | | - Kazimierz Ciechanowski
- Clinic of Internal Medicine, Nephrology and TransplantationPomeranian Medical University in SzczecinSzczecinPoland
| | - Joanna Kabat‐Koperska
- Clinic of Internal Medicine, Nephrology and TransplantationPomeranian Medical University in SzczecinSzczecinPoland
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Serine/Threonine Phosphatases in LTP: Two B or Not to Be the Protein Synthesis Blocker-Induced Impairment of Early Phase. Int J Mol Sci 2021; 22:ijms22094857. [PMID: 34064311 PMCID: PMC8125358 DOI: 10.3390/ijms22094857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/27/2021] [Accepted: 04/30/2021] [Indexed: 11/25/2022] Open
Abstract
Dephosphorylation of target proteins at serine/threonine residues is one of the most crucial mechanisms regulating their activity and, consequently, the cellular functions. The role of phosphatases in synaptic plasticity, especially in long-term depression or depotentiation, has been reported. We studied serine/threonine phosphatase activity during the protein synthesis blocker (PSB)-induced impairment of long-term potentiation (LTP). Established protein phosphatase 2B (PP2B, calcineurin) inhibitor cyclosporin A prevented the LTP early phase (E-LTP) decline produced by pretreatment of hippocampal slices with cycloheximide or anisomycin. For the first time, we directly measured serine/threonine phosphatase activity during E-LTP, and its significant increase in PSB-treated slices was demonstrated. Nitric oxide (NO) donor SNAP also heightened phosphatase activity in the same manner as PSB, and simultaneous application of anisomycin + SNAP had no synergistic effect. Direct measurement of the NO production in hippocampal slices by the NO-specific fluorescent probe DAF-FM revealed that PSBs strongly stimulate the NO concentration in all studied brain areas: CA1, CA3, and dentate gyrus (DG). Cyclosporin A fully abolished the PSB-induced NO production in the hippocampus, suggesting a close relationship between nNOS and PP2B activity. Surprisingly, cyclosporin A alone impaired short-term plasticity in CA1 by decreasing paired-pulse facilitation, which suggests bi-directionality of the influences of PP2B in the hippocampus. In conclusion, we proposed a minimal model of signaling events that occur during LTP induction in normal conditions and the PSB-treated slices.
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Caraveo G, Soste M, Cappelleti V, Fanning S, van Rossum DB, Whitesell L, Huang Y, Chung CY, Baru V, Zaichick S, Picotti P, Lindquist S. FKBP12 contributes to α-synuclein toxicity by regulating the calcineurin-dependent phosphoproteome. Proc Natl Acad Sci U S A 2017; 114:E11313-E11322. [PMID: 29229832 PMCID: PMC5748183 DOI: 10.1073/pnas.1711926115] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Calcineurin is an essential Ca2+-dependent phosphatase. Increased calcineurin activity is associated with α-synuclein (α-syn) toxicity, a protein implicated in Parkinson's Disease (PD) and other neurodegenerative diseases. Calcineurin can be inhibited with Tacrolimus through the recruitment and inhibition of the 12-kDa cis-trans proline isomerase FK506-binding protein (FKBP12). Whether calcineurin/FKBP12 represents a native physiologically relevant assembly that occurs in the absence of pharmacological perturbation has remained elusive. We leveraged α-syn as a model to interrogate whether FKBP12 plays a role in regulating calcineurin activity in the absence of Tacrolimus. We show that FKBP12 profoundly affects the calcineurin-dependent phosphoproteome, promoting the dephosphorylation of a subset of proteins that contributes to α-syn toxicity. Using a rat model of PD, partial elimination of the functional interaction between FKBP12 and calcineurin, with low doses of the Food and Drug Administration (FDA)-approved compound Tacrolimus, blocks calcineurin's activity toward those proteins and protects against the toxic hallmarks of α-syn pathology. Thus, FKBP12 can endogenously regulate calcineurin activity with therapeutic implications for the treatment of PD.
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Affiliation(s)
- Gabriela Caraveo
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142;
| | - Martin Soste
- Department of Biology, Institute of Biochemistry, Eidgenössische Technische Hochschule Zurich, 8092 Zurich, Switzerland
| | - Valentina Cappelleti
- Department of Biology, Institute of Biochemistry, Eidgenössische Technische Hochschule Zurich, 8092 Zurich, Switzerland
- Department of Computational Biology, Research and Innovation Centre, Foundation Edmund Mach, 38010 San Michele, Italy
| | - Saranna Fanning
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142
| | - Damian B van Rossum
- Department of Pathology, Penn State College of Medicine, Hershey, PA 17033
- The Jake Gittlen Laboratories for Cancer Research, Penn State College of Medicine, Hershey, PA 17033
| | - Luke Whitesell
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142
| | - Yanmei Huang
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142
| | - Chee Yeun Chung
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142
| | - Valeriya Baru
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142
| | - Sofia Zaichick
- Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Paola Picotti
- Department of Biology, Institute of Biochemistry, Eidgenössische Technische Hochschule Zurich, 8092 Zurich, Switzerland
| | - Susan Lindquist
- Whitehead Institute for Biomedical Research, Cambridge, MA 02142
- Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA 02139
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139
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Wang YL, Zhang CX. Putting a brake on synaptic vesicle endocytosis. Cell Mol Life Sci 2017; 74:2917-2927. [PMID: 28361181 PMCID: PMC11107501 DOI: 10.1007/s00018-017-2506-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 02/14/2017] [Accepted: 03/14/2017] [Indexed: 01/16/2023]
Abstract
In chemical synapses, action potentials evoke synaptic vesicle fusion with the presynaptic membrane at the active zone to release neurotransmitter. Synaptic vesicle endocytosis (SVE) then follows exocytosis to recapture vesicle proteins and lipid components for recycling and the maintenance of membrane homeostasis. Therefore, SVE plays an essential role during neurotransmission and is one of the most precisely regulated biological processes. Four modes of SVE have been characterized and both positive and negative regulators have been identified. However, our understanding of SVE regulation remains unclear, especially the identity of negative regulators and their mechanisms of action. Here, we review the current knowledge of proteins that function as inhibitors of SVE and their modes of action in different forms of endocytosis. We also propose possible physiological roles of such negative regulation. We believe that a better understanding of SVE regulation, especially the inhibitory mechanisms, will shed light on neurotransmission in health and disease.
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Affiliation(s)
- Ya-Long Wang
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Capital Medical University, Key Laboratory for the Neurodegenerative Disorders of the Chinese Ministry of Education, Beijing, China
| | - Claire Xi Zhang
- Center of Parkinson's Disease, Beijing Institute for Brain Disorders, Capital Medical University, Key Laboratory for the Neurodegenerative Disorders of the Chinese Ministry of Education, Beijing, China.
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Azzi JR, Sayegh MH, Mallat SG. Calcineurin inhibitors: 40 years later, can't live without ... THE JOURNAL OF IMMUNOLOGY 2014; 191:5785-91. [PMID: 24319282 DOI: 10.4049/jimmunol.1390055] [Citation(s) in RCA: 201] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Calcineurin inhibitors (CNIs) revolutionized the field of organ transplantation and remain the standard of care 40 years after the discovery of cyclosporine. The early impressive results of cyclosporine in kidney transplant recipients led to its subsequent use in other organ transplant recipients and for treatment of a variety of autoimmune diseases as well. In this review, we examine the discovery of CNIs, their mechanism of action, preclinical and clinical studies with CNIs, and the usage of CNIs in nontransplant recipients. We review the mechanisms of renal toxicity associated with CNIs and the recent efforts to avoid or reduce usage of these drugs. Although minimization strategies are possible, safe, and of potential long-term benefit, complete avoidance of CNIs has proven to be more challenging than initially thought.
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Affiliation(s)
- Jamil R Azzi
- Renal Division, Transplantation Research Center, Brigham and Women's Hospital and Boston Children's Hospital, Harvard Medical School, Boston, MA 02115
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Aramburu J, Rao A, Klee CB. Calcineurin: from structure to function. CURRENT TOPICS IN CELLULAR REGULATION 2000; 36:237-95. [PMID: 10842755 DOI: 10.1016/s0070-2137(01)80011-x] [Citation(s) in RCA: 248] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- J Aramburu
- Department of Pathology, Harvard Medical School, Boston, Massachusetts, USA
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Nevalainen LT, Aoyama T, Ikura M, Crivici A, Yan H, Chua NH, Nairn AC. Characterization of novel calmodulin-binding peptides with distinct inhibitory effects on calmodulin-dependent enzymes. Biochem J 1997; 321 ( Pt 1):107-15. [PMID: 9003408 PMCID: PMC1218043 DOI: 10.1042/bj3210107] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We describe the isolation and interaction with calmodulin (CaM) of two 10-amino-acid peptides (termed peptides 1 and 2; AWDTVRISFG and AWPSLQAIRG respectively) derived from a phage random peptide display library. Both peptides are shorter than previously described CaM-binding peptides and lack certain features found in the sequences of CaM-binding domains present in CaM-activated enzymes. However, 1H NMR spectroscopy and fluorimetry indicate that both peptides interact with CaM in the presence of Ca2+. The two peptides differentially inhibited CaM-dependent kinases I and II (CaM kinases I and II) but did not affect CaM-dependent phosphodiesterase. Peptide 1 inhibited CaM kinase I but not CaM kinase II, whereas peptide 2 inhibited CaM kinase II, but only partially inhibited CaM kinase I at a more than 10-fold higher concentration. Peptide 1 also inhibited a plant calcium-dependent protein kinase, whereas peptide 2 did not. The ability of peptides 1 and 2 to differentially inhibit CaM-dependent kinases and CaM-dependent phosphodiesterase suggests that they may bind to distinct regions of CaM that are specifically responsible for activation of different CaM-dependent enzymes.
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Affiliation(s)
- L T Nevalainen
- Laboratory of Plant Molecular Biology, Rocketeller University, New York, NY 10021, USA
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Sacks DB, Mazus B, Joyal JL. The activity of calmodulin is altered by phosphorylation: modulation of calmodulin function by the site of phosphate incorporation. Biochem J 1995; 312 ( Pt 1):197-204. [PMID: 7492313 PMCID: PMC1136245 DOI: 10.1042/bj3120197] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Calmodulin transduces Ca2+ signals by binding to and activating essential regulatory enzymes. The large number of intracellular targets for calmodulin raises the possibility that mechanisms in addition to Ca2+ may modulate calmodulin activity. Phosphocalmodulin is found in cells and tissues, and calmodulin phosphorylation is enhanced by several mitogens. Phosphorylation of calmodulin on serine/threonine residues by casein kinase II decreased its ability to activate Ca2+/calmodulin-dependent protein kinase II (CaM-kinase II). The major effect was a 2.5-fold increase in the concentration at which half-maximal velocity (K0.5) was attained, with no apparent alteration in the Vmax, or the K0.5 for Ca2+. In contrast, calmodulin phosphorylated on tyrosine residues by the insulin receptor kinase produced an increase in the Vmax, with no alteration in the affinity for CaM-kinase II or the K0.5 for Ca2+. Direct determination by surface plasmon resonance of the dissociation constants with a synthetic peptide corresponding to the calmodulin-binding domain of CaM-kinase II revealed that phosphorylation on serine/threonine residues of calmodulin significantly decreased its affinity for the peptide, while tyrosine phosphorylation had no effect on binding. In contrast to CaM-kinase II, neither serine/threonine nor tyrosine phosphorylation of calmodulin altered its ability to activate calcineurin. These data indicate that phosphorylation of calmodulin differentially modifies its interaction with individual target enzymes. Moreover, the amino acid residues phosphorylated provide an additional level of control. These results demonstrate that phosphorylation is an in vitro regulatory mechanism in the targeting of calmodulin responses and, coupled with the stoichiometric phosphorylation of calmodulin in rat hepatocytes, suggest that it may be relevant in intact cells.
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Affiliation(s)
- D B Sacks
- Department of Pathology, Brigham and Women's Hospital, Boston, MA, USA
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Cunningham KW, Fink GR. Calcineurin-dependent growth control in Saccharomyces cerevisiae mutants lacking PMC1, a homolog of plasma membrane Ca2+ ATPases. J Cell Biol 1994; 124:351-63. [PMID: 7507493 PMCID: PMC2119937 DOI: 10.1083/jcb.124.3.351] [Citation(s) in RCA: 353] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Ca2+ ATPases deplete the cytosol of Ca2+ ions and are crucial to cellular Ca2+ homeostasis. The PMC1 gene of Saccharomyces cerevisiae encodes a vacuole membrane protein that is 40% identical to the plasma membrane Ca2+ ATPases (PMCAs) of mammalian cells. Mutants lacking PMC1 grow well in standard media, but sequester Ca2+ into the vacuole at 20% of the wild-type levels. pmc1 null mutants fail to grow in media containing high levels of Ca2+, suggesting a role of PMC1 in Ca2+ tolerance. The growth inhibitory effect of added Ca2+ requires activation of calcineurin, a Ca2+ and calmodulin-dependent protein phosphatase. Mutations in calcineurin A or B subunits or the inhibitory compounds FK506 and cyclosporin A restore growth of pmc1 mutants in high Ca2+ media. Also, growth is restored by recessive mutations that inactivate the high-affinity Ca(2+)-binding sites in calmodulin. This mutant calmodulin has apparently lost the ability to activate calcineurin in vivo. These results suggest that activation of calcineurin by Ca2+ and calmodulin can negatively affect yeast growth. A second Ca2+ ATPase homolog encoded by the PMR1 gene acts together with PMC1 to prevent lethal activation of calcineurin even in standard (low Ca2+) conditions. We propose that these Ca2+ ATPase homologs are essential in yeast to deplete the cytosol of Ca2+ ions which, at elevated concentrations, inhibits yeast growth through inappropriate activation of calcineurin.
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Affiliation(s)
- K W Cunningham
- Whitehead Institute, Massachusetts Institute of Technology, Cambridge 02142
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Regulation of the erythrocyte Ca(2+)-ATPase by mutant calmodulins with Glu—-Ala substitutions in the Ca(2+)-binding domains. J Biol Chem 1992. [DOI: 10.1016/s0021-9258(18)42848-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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George SE, VanBerkum MF, Ono T, Cook R, Hanley RM, Putkey JA, Means AR. Chimeric calmodulin-cardiac troponin C proteins differentially activate calmodulin target enzymes. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(19)38836-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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VanBerkum MF, George SE, Means AR. Calmodulin activation of target enzymes. Consequences of deletions in the central helix. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(19)39658-9] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Haiech J, Kilhoffer MC, Craig TA, Lukas TJ, Wilson E, Guerra-Santos L, Watterson DM. Mutant analysis approaches to understanding calcium signal transduction through calmodulin and calmodulin regulated enzymes. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1990; 269:43-56. [PMID: 2191562 DOI: 10.1007/978-1-4684-5754-4_7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
An example set of site-specific mutagenesis studies of calmodulin has been discussed in terms of strategy and how the results can provide insight into the functioning of calmodulin. A set of common examples for the study of calcium binding and enzyme activation were discussed. Essentially, site-specific mutagenesis in these initial studies is a perturbation approach. From these perturbation studies, structural features can be correlated in future studies with function and mechanisms of action proposed. More importantly, the approach allows efficient testing of proposed mechanisms and further probing of the molecular aspects of the signal transduction pathways. Clearly, the key functional feature that must be addressed in future studies is how the calcium binding steps in the mechanism are coupled to the enzyme activation step, which is the final step of the calmodulin-enzyme binding mechanism.
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Chin D, Brew K. Effects of modifying individual amino or carboxyl groups on the affinity of calmodulin for calcineurin. J Biol Chem 1989. [DOI: 10.1016/s0021-9258(19)84837-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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