1
|
Wang D, Li Y, Li G, Liu M, Zhou Z, Wu M, Song S, Bian Y, Dong J, Li X, Du Y, Zhang T, Shi Y. Inhibition of PKC-δ retards kidney fibrosis via inhibiting cGAS-STING signaling pathway in mice. Cell Death Discov 2024; 10:314. [PMID: 38972937 PMCID: PMC11228024 DOI: 10.1038/s41420-024-02087-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 06/17/2024] [Accepted: 07/02/2024] [Indexed: 07/09/2024] Open
Abstract
Kidney fibrosis is considered to be the ultimate aggregation pathway of chronic kidney disease (CKD), but its underlying mechanism remains elusive. Protein kinase C-delta (PKC-δ) plays critical roles in the control of growth, differentiation, and apoptosis. In this study, we found that PKC-δ was highly upregulated in human biopsy samples and mouse kidneys with fibrosis. Rottlerin, a PKC-δ inhibitor, alleviated unilateral ureteral ligation (UUO)-induced kidney fibrosis, inflammation, VDAC1 expression, and cGAS-STING signaling pathway activation. Adeno-associated virus 9 (AAV9)-mediated VDAC1 silencing or VBIT-12, a VDAC1 inhibitor, attenuated renal injury, inflammation, and activation of cGAS-STING signaling pathway in UUO mouse model. Genetic and pharmacologic inhibition of STING relieved renal fibrosis and inflammation in UUO mice. In vitro, hypoxia resulted in PKC-δ phosphorylation, VDAC1 oligomerization, and activation of cGAS-STING signaling pathway in HK-2 cells. Inhibition of PKC-δ, VDAC1 or STING alleviated hypoxia-induced fibrotic and inflammatory responses in HK-2 cells, respectively. Mechanistically, PKC-δ activation induced mitochondrial membrane VDAC1 oligomerization via direct binding VDAC1, followed by the mitochondrial DNA (mtDNA) release into the cytoplasm, and subsequent activated cGAS-STING signaling pathway, which contributed to the inflammation leading to fibrosis. In conclusion, this study has indicated for the first time that PKC-δ is an important regulator in kidney fibrosis by promoting cGAS-STING signaling pathway which mediated by VDAC1. PKC-δ may be useful for treating renal fibrosis and subsequent CKD.
Collapse
Affiliation(s)
- Dongyun Wang
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Yue Li
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
| | - Guiying Li
- Department of Nephrology, Affiliated Hospital of Hebei University of Engineering, Handan, 056000, China
| | - Mengyu Liu
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
| | - Zihui Zhou
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Ming Wu
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Shan Song
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Yawei Bian
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Jiajia Dong
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Xinran Li
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Yunxia Du
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
| | - Tao Zhang
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China
- Department of Nephrology, Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China
| | - Yonghong Shi
- Department of Pathology, Hebei Medical University, Shijiazhuang, 050017, China.
- Hebei Key Laboratory of Kidney Disease, Shijiazhuang, 050017, China.
| |
Collapse
|
2
|
Moin M, Bommineni PR, Tyagi W. Exploration of the pearl millet phospholipase gene family to identify potential candidates for grain quality traits. BMC Genomics 2024; 25:581. [PMID: 38858648 PMCID: PMC11165789 DOI: 10.1186/s12864-024-10504-x] [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: 04/21/2024] [Accepted: 06/06/2024] [Indexed: 06/12/2024] Open
Abstract
BACKGROUND Phospholipases constitute a diverse category of enzymes responsible for the breakdown of phospholipids. Their involvement in signal transduction with a pivotal role in plant development and stress responses is well documented. RESULTS In the present investigation, a thorough genome-wide analysis revealed that the pearl millet genome contains at least 44 phospholipase genes distributed across its 7 chromosomes, with chromosome one harbouring the highest number of these genes. The synteny analysis suggested a close genetic relationship of pearl millet phospholipases with that of foxtail millet and sorghum. All identified genes were examined to unravel their gene structures, protein attributes, cis-regulatory elements, and expression patterns in two pearl millet genotypes contrasting for rancidity. All the phospholipases have a high alpha-helix content and distorted regions within the predicted secondary structures. Moreover, many of these enzymes possess binding sites for both metal and non-metal ligands. Additionally, the putative promoter regions associated with these genes exhibit multiple copies of cis-elements specifically responsive to biotic and abiotic stress factors and signaling molecules. The transcriptional profiling of 44 phospholipase genes in two genotypes contrasting for rancidity across six key tissues during pearl millet growth revealed a predominant expression in grains, followed by seed coat and endosperm. Specifically, the genes PgPLD-alpha1-1, PgPLD-alpha1-5, PgPLD-delta1-7a, PgPLA1-II-1a, and PgPLD-delta1-2a exhibited notable expression in grains of both the genotypes while showing negligible expression in the other five tissues. The sequence alignment of putative promoters revealed several variations including SNPs and InDels. These variations resulted in modifications to the corresponding cis-acting elements, forming distinct transcription factor binding sites suggesting the transcriptional-level regulation for these five genes in pearl millet. CONCLUSIONS The current study utilized a genome-wide computational analysis to characterize the phospholipase gene family in pearl millet. A comprehensive expression profile of 44 phospholipases led to the identification of five grain-specific candidates. This underscores a potential role for at least these five genes in grain quality traits including the regulation of rancidity in pearl millet. Therefore, this study marks the first exploration highlighting the possible impact of phospholipases towards enhancing agronomic traits in pearl millet.
Collapse
Affiliation(s)
- Mazahar Moin
- Cell and Molecular Biology and Trait Engineering, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Patancheru, Telangana, 502324, India
| | - Pradeep Reddy Bommineni
- Cell and Molecular Biology and Trait Engineering, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Patancheru, Telangana, 502324, India
| | - Wricha Tyagi
- Cell and Molecular Biology and Trait Engineering, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, Patancheru, Telangana, 502324, India.
| |
Collapse
|
3
|
Retracted: PKC-delta and PKD activate MAPK signal pathway in mechano-transcription of colonic smooth muscle cells. Neurogastroenterol Motil 2024; 36:e14623. [PMID: 37278189 DOI: 10.1111/nmo.14623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 05/04/2023] [Accepted: 05/19/2023] [Indexed: 06/07/2023]
Abstract
Retraction: [PKC-delta and PKD activate MAPK signal pathway in mechano-transcription of colonic smooth muscle cells, Z. Yang, K. He, T. Wang, et al. Neurogastroenterology & Motility 2023; e14623 (https://onlinelibrary.wiley.com/doi/full/10.1111/nmo.14623)]. The above article, published online on June 6, 2023 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the Journal Editor in Chief, Maura Corsetti, and John Wiley & Sons Ltd. The retraction has been agreed due to unat[1]tributed overlap between this article and the abstract published in Gastroenterology: Li F, Sarna SK and Shi XP. Roles of PKCs and PKD in Mechanotranscription in Colonic Smooth Muscle Cells: Inhibition of Mechanotranscription as a Potential Treatment for Motility Dysfunction in Obstructive Disorders. In: 2012 Digestive Disease Week Abstract Supplement; May 19-22, San Diego, CA. Abstract 120 (https://www.gastrojournal.org/article/S0016-5085(12)60115-2/pdf).
Collapse
|
4
|
Murter BM, Robinson SC, Banerjee H, Lau L, Uche U, Szymczak-Workman AL, Kane LP. Downregulation of PIK3IP1/TrIP on T cells is controlled by TCR signal strength, PKC, and metalloprotease-mediated cleavage. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.29.591680. [PMID: 38746242 PMCID: PMC11092459 DOI: 10.1101/2024.04.29.591680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
The protein known as PI3K-interacting protein (PIK3IP1), or transmembrane inhibitor of PI3K (TrIP), is highly expressed by T cells and can modulate PI3K activity in these cells. Several studies have also revealed that TrIP is rapidly downregulated following T cell activation. However, it is unclear as to how this downregulation is controlled. Using a novel monoclonal antibody that robustly stains cell-surface TrIP, we demonstrate that TrIP is lost from the surface of activated T cells in a manner dependent on the strength of signaling through the T cell receptor (TCR) and specific downstream signaling pathways. In addition, TrIP expression returns after 24 hours, suggesting that it may play a role in resetting TCR signaling at later time points. Finally, by expressing truncated forms of TrIP in cells, we identify the region in the extracellular stalk domain of TrIP that is targeted for proteolytic cleavage by metalloprotease ADAM17.
Collapse
|
5
|
Chen XR, Dixit K, Yang Y, McDermott MI, Imam HT, Bankaitis VA, Igumenova TI. A novel bivalent interaction mode underlies a non-catalytic mechanism for Pin1-mediated protein kinase C regulation. eLife 2024; 13:e92884. [PMID: 38687676 PMCID: PMC11060717 DOI: 10.7554/elife.92884] [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: 09/19/2023] [Accepted: 04/08/2024] [Indexed: 05/02/2024] Open
Abstract
Regulated hydrolysis of the phosphoinositide phosphatidylinositol(4,5)-bis-phosphate to diacylglycerol and inositol-1,4,5-P3 defines a major eukaryotic pathway for translation of extracellular cues to intracellular signaling circuits. Members of the lipid-activated protein kinase C isoenzyme family (PKCs) play central roles in this signaling circuit. One of the regulatory mechanisms employed to downregulate stimulated PKC activity is via a proteasome-dependent degradation pathway that is potentiated by peptidyl-prolyl isomerase Pin1. Here, we show that contrary to prevailing models, Pin1 does not regulate conventional PKC isoforms α and βII via a canonical cis-trans isomerization of the peptidyl-prolyl bond. Rather, Pin1 acts as a PKC binding partner that controls PKC activity via sequestration of the C-terminal tail of the kinase. The high-resolution structure of full-length Pin1 complexed to the C-terminal tail of PKCβII reveals that a novel bivalent interaction mode underlies the non-catalytic mode of Pin1 action. Specifically, Pin1 adopts a conformation in which it uses the WW and PPIase domains to engage two conserved phosphorylated PKC motifs, the turn motif and hydrophobic motif, respectively. Hydrophobic motif is a non-canonical Pin1-interacting element. The structural information combined with the results of extensive binding studies and experiments in cultured cells suggest that non-catalytic mechanisms represent unappreciated modes of Pin1-mediated regulation of AGC kinases and other key enzymes/substrates.
Collapse
Affiliation(s)
- Xiao-Ru Chen
- Department of Biochemistry & Biophysics, Texas A&M UniversityCollege StationUnited States
| | - Karuna Dixit
- Department of Biochemistry & Biophysics, Texas A&M UniversityCollege StationUnited States
| | - Yuan Yang
- Department of Biochemistry & Biophysics, Texas A&M UniversityCollege StationUnited States
| | - Mark I McDermott
- Department of Cell Biology & Genetics, Texas A&M UniversityCollege StationUnited States
| | - Hasan Tanvir Imam
- Department of Biochemistry & Biophysics, Texas A&M UniversityCollege StationUnited States
| | - Vytas A Bankaitis
- Department of Cell Biology & Genetics, Texas A&M UniversityCollege StationUnited States
| | - Tatyana I Igumenova
- Department of Biochemistry & Biophysics, Texas A&M UniversityCollege StationUnited States
- Department of Cell Biology & Genetics, Texas A&M UniversityCollege StationUnited States
| |
Collapse
|
6
|
Nguyen JH, Curtis MA, Imami AS, Ryan WG, Alganem K, Neifer KL, Saferin N, Nawor CN, Kistler BP, Miller GW, Shukla R, McCullumsmith RE, Burkett JP. Developmental pyrethroid exposure disrupts molecular pathways for MAP kinase and circadian rhythms in mouse brain. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.08.28.555113. [PMID: 37745438 PMCID: PMC10515776 DOI: 10.1101/2023.08.28.555113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Neurodevelopmental disorders (NDDs) are a category of pervasive disorders of the developing nervous system with few or no recognized biomarkers. A significant portion of the risk for NDDs, including attention deficit hyperactivity disorder (ADHD), is contributed by the environment, and exposure to pyrethroid pesticides during pregnancy has been identified as a potential risk factor for NDD in the unborn child. We recently showed that low-dose developmental exposure to the pyrethroid pesticide deltamethrin in mice causes male-biased changes to ADHD- and NDD-relevant behaviors as well as the striatal dopamine system. Here, we used an integrated multiomics approach to determine the broadest possible set of biological changes in the mouse brain caused by developmental pyrethroid exposure (DPE). Using a litter-based, split-sample design, we exposed mouse dams during pregnancy and lactation to deltamethrin (3 mg/kg or vehicle every 3 days) at a concentration well below the EPA-determined benchmark dose used for regulatory guidance. We raised male offspring to adulthood, euthanized them, and pulverized and divided whole brain samples for split-sample transcriptomics, kinomics and multiomics integration. Transcriptome analysis revealed alterations to multiple canonical clock genes, and kinome analysis revealed changes in the activity of multiple kinases involved in synaptic plasticity, including the mitogen-activated protein (MAP) kinase ERK. Multiomics integration revealed a dysregulated protein-protein interaction network containing primary clusters for MAP kinase cascades, regulation of apoptosis, and synaptic function. These results demonstrate that DPE causes a multi-modal biophenotype in the brain relevant to ADHD and identifies new potential mechanisms of action. NEW & NOTEWORTHY Here, we provide the first evidence that low-dose developmental exposure to the pyrethroid pesticide, deltamethrin, results in molecular disruptions in the adult mouse brain in pathways regulating circadian rhythms and neuronal growth (MAP kinase). This same exposure causes a neurodevelopmental disorder (NDD) relevant behavioral changes in adult mice, making these findings relevant to the prevention of NDDs.
Collapse
|
7
|
Nadel G, Yao Z, Hacohen-Lev-Ran A, Wainstein E, Maik-Rachline G, Ziv T, Naor Z, Admon A, Seger R. Phosphorylation of PP2Ac by PKC is a key regulatory step in the PP2A-switch-dependent AKT dephosphorylation that leads to apoptosis. Cell Commun Signal 2024; 22:154. [PMID: 38419089 PMCID: PMC10900696 DOI: 10.1186/s12964-024-01536-7] [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: 07/17/2023] [Accepted: 02/17/2024] [Indexed: 03/02/2024] Open
Abstract
BACKGROUND Although GqPCR activation often leads to cell survival by activating the PI3K/AKT pathway, it was previously shown that in several cell types AKT activity is reduced and leads to JNK activation and apoptosis. The mechanism of AKT inactivation in these cells involves an IGBP1-coupled PP2Ac switch that induces the dephosphorylation and inactivation of both PI3K and AKT. However, the machinery involved in the initiation of PP2A switch is not known. METHODS We used phospho-mass spectrometry to identify the phosphorylation site of PP2Ac, and raised specific antibodies to follow the regulation of this phosphorylation. Other phosphorylations were monitored by commercial antibodies. In addition, we used coimmunoprecipitation and proximity ligation assays to follow protein-protein interactions. Apoptosis was detected by a TUNEL assay as well as PARP1 cleavage using SDS-PAGE and Western blotting. RESULTS We identified Ser24 as a phosphorylation site in PP2Ac. The phosphorylation is mediated mainly by classical PKCs (PKCα and PKCβ) but not by novel PKCs (PKCδ and PKCε). By replacing the phosphorylated residue with either unphosphorylatable or phosphomimetic residues (S24A and S24E), we found that this phosphorylation event is necessary and sufficient to mediate the PP2A switch, which ultimately induces AKT inactivation, and a robust JNK-dependent apoptosis. CONCLUSION Our results show that the PP2A switch is induced by PKC-mediated phosphorylation of Ser24-PP2Ac and that this phosphorylation leads to apoptosis upon GqPCR induction of various cells. We propose that this mechanism may provide an unexpected way to treat some cancer types or problems in the endocrine machinery.
Collapse
Affiliation(s)
- Guy Nadel
- Department of Immunology and Regenerative Biology, the Weizmann Institute of Science, Rehovot, Israel
| | - Zhong Yao
- Department of Immunology and Regenerative Biology, the Weizmann Institute of Science, Rehovot, Israel
| | - Avital Hacohen-Lev-Ran
- Department of Immunology and Regenerative Biology, the Weizmann Institute of Science, Rehovot, Israel
| | - Ehud Wainstein
- Department of Immunology and Regenerative Biology, the Weizmann Institute of Science, Rehovot, Israel
| | - Galia Maik-Rachline
- Department of Immunology and Regenerative Biology, the Weizmann Institute of Science, Rehovot, Israel
| | - Tamar Ziv
- Smoler Proteomic Center, Technion-Israel Institute of Technology, Haifa, Israel
| | - Zvi Naor
- Department of Biochemistry and Molecular Biology, Tel Aviv University, Tel Aviv, Israel
| | - Arie Admon
- Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Rony Seger
- Department of Immunology and Regenerative Biology, the Weizmann Institute of Science, Rehovot, Israel.
| |
Collapse
|
8
|
Tarasova E, Bogacheva P, Chernyshev K, Balezina O. Quantal size increase induced by the endocannabinoid 2-arachidonoylglycerol requires activation of CGRP receptors in mouse motor synapses. Synapse 2024; 78:e22281. [PMID: 37694983 DOI: 10.1002/syn.22281] [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: 05/06/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 09/12/2023]
Abstract
In mouse motor synapses, the exogenous application of the endocannabinoid (EC) 2-arachidonoylglycerol (2-AG) increases acetylcholine (ACh) quantal size due to the activation of CB1 receptors and the stimulation of ACh vesicular uptake. In the present study, microelectrode recordings of miniature endplate potentials (MEPP) revealed that this effect of 2-AG is independent of brain-derived neurotrophic factor (BDNF) signaling but involves the activation of calcitonin gene-related peptide (CGRP) receptors along with CB1 receptors. Potentiation of MEPP amplitude in the presence of 2-AG was prevented by blockers of CGRP receptors and ryanodine receptors (RyR) and by inhibitors of phospholipase C (PLC) and Ca2+ /calmodulin-dependent protein kinase II (CaMKII). Therefore, we suggest a hypothetical chain of events, which starts from the activation of presynaptic CB1 receptors, involves PLC, RyR, and CaMKII, and results in CGRP release with the subsequent activation of presynaptic CGRP receptors. Activation of CGRP receptors is probably a part of a complex molecular cascade leading to the 2-AG-induced increase in ACh quantal size and MEPP amplitude. We propose that the same chain of events may also take place if 2-AG is endogenously produced in mouse motor synapses, because the increase in MEPP amplitude that follows after prolonged tetanic muscle contractions (30 Hz, 2 min) was prevented by the blocking of CB1 receptors. This work may help to unveil the previously unknown aspects of the functional interaction between ECs and peptide modulators aimed at the regulation of quantal size and synaptic transmission.
Collapse
Affiliation(s)
- Ekaterina Tarasova
- Department of Human and Animal Physiology, Biological Faculty, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Polina Bogacheva
- Department of Human and Animal Physiology, Biological Faculty, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Kirill Chernyshev
- Department of Human and Animal Physiology, Biological Faculty, Lomonosov Moscow State University, Moscow, Russian Federation
| | - Olga Balezina
- Department of Human and Animal Physiology, Biological Faculty, Lomonosov Moscow State University, Moscow, Russian Federation
| |
Collapse
|
9
|
Qin K, Yu M, Fan J, Wang H, Zhao P, Zhao G, Zeng W, Chen C, Wang Y, Wang A, Schwartz Z, Hong J, Song L, Wagstaff W, Haydon RC, Luu HH, Ho SH, Strelzow J, Reid RR, He TC, Shi LL. Canonical and noncanonical Wnt signaling: Multilayered mediators, signaling mechanisms and major signaling crosstalk. Genes Dis 2024; 11:103-134. [PMID: 37588235 PMCID: PMC10425814 DOI: 10.1016/j.gendis.2023.01.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/01/2022] [Accepted: 01/29/2023] [Indexed: 08/18/2023] Open
Abstract
Wnt signaling plays a major role in regulating cell proliferation and differentiation. The Wnt ligands are a family of 19 secreted glycoproteins that mediate their signaling effects via binding to Frizzled receptors and LRP5/6 coreceptors and transducing the signal either through β-catenin in the canonical pathway or through a series of other proteins in the noncanonical pathway. Many of the individual components of both canonical and noncanonical Wnt signaling have additional functions throughout the body, establishing the complex interplay between Wnt signaling and other signaling pathways. This crosstalk between Wnt signaling and other pathways gives Wnt signaling a vital role in many cellular and organ processes. Dysregulation of this system has been implicated in many diseases affecting a wide array of organ systems, including cancer and embryological defects, and can even cause embryonic lethality. The complexity of this system and its interacting proteins have made Wnt signaling a target for many therapeutic treatments. However, both stimulatory and inhibitory treatments come with potential risks that need to be addressed. This review synthesized much of the current knowledge on the Wnt signaling pathway, beginning with the history of Wnt signaling. It thoroughly described the different variants of Wnt signaling, including canonical, noncanonical Wnt/PCP, and the noncanonical Wnt/Ca2+ pathway. Further description involved each of its components and their involvement in other cellular processes. Finally, this review explained the various other pathways and processes that crosstalk with Wnt signaling.
Collapse
Affiliation(s)
- Kevin Qin
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Michael Yu
- Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, IL 60064, USA
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jiaming Fan
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Ministry of Education Key Laboratory of Diagnostic Medicine, and Department of Clinical Biochemistry, The School of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, China
| | - Hongwei Wang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Piao Zhao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery and Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Guozhi Zhao
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Departments of Orthopaedic Surgery and Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Wei Zeng
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Department of Interventional Neurology, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, Guangdong 523475, China
| | - Connie Chen
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Yonghui Wang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Department of Clinical Laboratory Medicine, Shanghai Jiaotong University School of Medicine, Shanghai 200000, China
| | - Annie Wang
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Laboratory of Craniofacial Biology and Development, Department of Surgery Section of Plastic Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Zander Schwartz
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- School of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, USA
| | - Jeffrey Hong
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Lily Song
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - William Wagstaff
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Rex C. Haydon
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Hue H. Luu
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Sherwin H. Ho
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Jason Strelzow
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Russell R. Reid
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Laboratory of Craniofacial Biology and Development, Department of Surgery Section of Plastic Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Tong-Chuan He
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
- Laboratory of Craniofacial Biology and Development, Department of Surgery Section of Plastic Surgery, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Lewis L. Shi
- Molecular Oncology Laboratory, Department of Orthopaedic Surgery and Rehabilitation Medicine, The University of Chicago Medical Center, Chicago, IL 60637, USA
| |
Collapse
|
10
|
Silnitsky S, Rubin SJS, Zerihun M, Qvit N. An Update on Protein Kinases as Therapeutic Targets-Part I: Protein Kinase C Activation and Its Role in Cancer and Cardiovascular Diseases. Int J Mol Sci 2023; 24:17600. [PMID: 38139428 PMCID: PMC10743896 DOI: 10.3390/ijms242417600] [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: 11/01/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Protein kinases are one of the most significant drug targets in the human proteome, historically harnessed for the treatment of cancer, cardiovascular disease, and a growing number of other conditions, including autoimmune and inflammatory processes. Since the approval of the first kinase inhibitors in the late 1990s and early 2000s, the field has grown exponentially, comprising 98 approved therapeutics to date, 37 of which were approved between 2016 and 2021. While many of these small-molecule protein kinase inhibitors that interact orthosterically with the protein kinase ATP binding pocket have been massively successful for oncological indications, their poor selectively for protein kinase isozymes have limited them due to toxicities in their application to other disease spaces. Thus, recent attention has turned to the use of alternative allosteric binding mechanisms and improved drug platforms such as modified peptides to design protein kinase modulators with enhanced selectivity and other pharmacological properties. Herein we review the role of different protein kinase C (PKC) isoforms in cancer and cardiovascular disease, with particular attention to PKC-family inhibitors. We discuss translational examples and carefully consider the advantages and limitations of each compound (Part I). We also discuss the recent advances in the field of protein kinase modulators, leverage molecular docking to model inhibitor-kinase interactions, and propose mechanisms of action that will aid in the design of next-generation protein kinase modulators (Part II).
Collapse
Affiliation(s)
- Shmuel Silnitsky
- The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Henrietta Szold St. 8, Safed 1311502, Israel; (S.S.); (M.Z.)
| | - Samuel J. S. Rubin
- Department of Medicine, School of Medicine, Stanford University, 300 Pasteur Drive, Stanford, CA 94305, USA;
| | - Mulate Zerihun
- The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Henrietta Szold St. 8, Safed 1311502, Israel; (S.S.); (M.Z.)
| | - Nir Qvit
- The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Henrietta Szold St. 8, Safed 1311502, Israel; (S.S.); (M.Z.)
| |
Collapse
|
11
|
Lim EY, Lee SY, Shin HS, Kim GD. Reactive Oxygen Species and Strategies for Antioxidant Intervention in Acute Respiratory Distress Syndrome. Antioxidants (Basel) 2023; 12:2016. [PMID: 38001869 PMCID: PMC10669909 DOI: 10.3390/antiox12112016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a life-threatening pulmonary condition characterized by the sudden onset of respiratory failure, pulmonary edema, dysfunction of endothelial and epithelial barriers, and the activation of inflammatory cascades. Despite the increasing number of deaths attributed to ARDS, a comprehensive therapeutic approach for managing patients with ARDS remains elusive. To elucidate the pathological mechanisms underlying ARDS, numerous studies have employed various preclinical models, often utilizing lipopolysaccharide as the ARDS inducer. Accumulating evidence emphasizes the pivotal role of reactive oxygen species (ROS) in the pathophysiology of ARDS. Both preclinical and clinical investigations have asserted the potential of antioxidants in ameliorating ARDS. This review focuses on various sources of ROS, including NADPH oxidase, uncoupled endothelial nitric oxide synthase, cytochrome P450, and xanthine oxidase, and provides a comprehensive overview of their roles in ARDS. Additionally, we discuss the potential of using antioxidants as a strategy for treating ARDS.
Collapse
Affiliation(s)
- Eun Yeong Lim
- Division of Food Functionality Research, Korea Food Research Institute (KFRI), Wanju 55365, Republic of Korea; (E.Y.L.); (S.-Y.L.); (H.S.S.)
| | - So-Young Lee
- Division of Food Functionality Research, Korea Food Research Institute (KFRI), Wanju 55365, Republic of Korea; (E.Y.L.); (S.-Y.L.); (H.S.S.)
- Department of Food Biotechnology, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Hee Soon Shin
- Division of Food Functionality Research, Korea Food Research Institute (KFRI), Wanju 55365, Republic of Korea; (E.Y.L.); (S.-Y.L.); (H.S.S.)
- Department of Food Biotechnology, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Gun-Dong Kim
- Division of Food Functionality Research, Korea Food Research Institute (KFRI), Wanju 55365, Republic of Korea; (E.Y.L.); (S.-Y.L.); (H.S.S.)
| |
Collapse
|
12
|
Chen XR, Dixit K, Yang Y, McDermott MI, Imam HT, Bankaitis VA, Igumenova TI. A novel bivalent interaction mode underlies a non-catalytic mechanism for Pin1-mediated Protein Kinase C regulation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.18.558341. [PMID: 37781616 PMCID: PMC10541119 DOI: 10.1101/2023.09.18.558341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Regulated hydrolysis of the phosphoinositide phosphatidylinositol(4,5)-bis-phosphate to diacylglycerol and inositol-1,4,5-P3 defines a major eukaryotic pathway for translation of extracellular cues to intracellular signaling circuits. Members of the lipid-activated protein kinase C isoenzyme family (PKCs) play central roles in this signaling circuit. One of the regulatory mechanisms employed to downregulate stimulated PKC activity is via a proteasome-dependent degradation pathway that is potentiated by peptidyl-prolyl isomerase Pin1. Here, we show that contrary to prevailing models, Pin1 does not regulate conventional PKC isoforms α and βII via a canonical cis-trans isomerization of the peptidyl-prolyl bond. Rather, Pin1 acts as a PKC binding partner that controls PKC activity via sequestration of the C-terminal tail of the kinase. The high-resolution structure of Pin1 complexed to the C-terminal tail of PKCβII reveals that a novel bivalent interaction mode underlies the non-catalytic mode of Pin1 action. Specifically, Pin1 adopts a compact conformation in which it engages two conserved phosphorylated PKC motifs, the turn motif and hydrophobic motif, the latter being a non-canonical Pin1-interacting element. The structural information, combined with the results of extensive binding studies and in vivo experiments suggest that non-catalytic mechanisms represent unappreciated modes of Pin1-mediated regulation of AGC kinases and other key enzymes/substrates.
Collapse
|
13
|
Shete N, Calabrese J, Tonetti DA. Revisiting Estrogen for the Treatment of Endocrine-Resistant Breast Cancer: Novel Therapeutic Approaches. Cancers (Basel) 2023; 15:3647. [PMID: 37509308 PMCID: PMC10377916 DOI: 10.3390/cancers15143647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/10/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Estrogen receptor (ER)-positive breast cancer is the most common subtype, representing 70-75% of all breast cancers. Several ER-targeted drugs commonly used include the selective estrogen receptor modulator (SERM), tamoxifen (TAM), aromatase inhibitors (AIs) and selective estrogen receptor degraders (SERDs). Through different mechanisms of action, all three drug classes reduce estrogen receptor signaling. Inevitably, resistance occurs, resulting in disease progression. The counterintuitive action of estrogen to inhibit ER-positive breast cancer was first observed over 80 years ago. High-dose estrogen and diethylstilbestrol (DES) were used to treat metastatic breast cancer accompanied by harsh side effects until the approval of TAM in the 1970s. After the development of TAM, randomized trials comparing TAM to estrogen found similar or slightly inferior efficacy but much better tolerability. After decades of research, it was learned that estrogen induces tumor regression only after a period of long-term estrogen deprivation, and the mechanisms of tumor regression were described. Despite the long history of breast cancer treatment with estrogen, this therapeutic modality is now revitalized due to the development of novel estrogenic compounds with improved side effect profiles, newly discovered predictive biomarkers, the development of non-estrogen small molecules and new combination therapeutic approaches.
Collapse
Affiliation(s)
- Nivida Shete
- Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Jordan Calabrese
- Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Debra A Tonetti
- Department of Pharmaceutical Sciences, University of Illinois Chicago, Chicago, IL 60612, USA
| |
Collapse
|
14
|
Cui Y, Li C, Zeng X, Wei X, Li P, Cheng J, Xu Q, Yang Y. ATP purinergic receptor signalling promotes Sca-1 + cell proliferation and migration for vascular remodelling. Cell Commun Signal 2023; 21:173. [PMID: 37430253 PMCID: PMC10332060 DOI: 10.1186/s12964-023-01185-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 06/06/2023] [Indexed: 07/12/2023] Open
Abstract
AIMS Vascular resident stem cells expressing stem cell antigen-1 (Sca-1+ cells) promote vascular regeneration and remodelling following injury through migration, proliferation and differentiation. The aim of this study was to examine the contributions of ATP signalling through purinergic receptor type 2 (P2R) isoforms in promoting Sca-1+ cell migration and proliferation after vascular injury and to elucidate the main downstream signalling pathways. METHODS AND RESULTS ATP-evoked changes in isolated Sca-1+ cell migration were examined by transwell assays, proliferation by viable cell counting assays and intracellular Ca2+ signalling by fluorometry, while receptor subtype contributions and downstream signals were examined by pharmacological or genetic inhibition, immunofluorescence, Western blotting and quantitative RT-PCR. These mechanisms were further examined in mice harbouring TdTomato-labelled Sca-1+ cells with and without Sca-1+-targeted P2R knockout following femoral artery guidewire injury. Stimulation with ATP promoted cultured Sca-1+ cell migration, induced intracellular free calcium elevations primarily via P2Y2R stimulation and accelerated proliferation mainly via P2Y6R stimulation. Enhanced migration was inhibited by the ERK blocker PD98059 or P2Y2R-shRNA, while enhanced proliferation was inhibited by the P38 inhibitor SB203580. Femoral artery guidewire injury of the neointima increased the number of TdTomato-labelled Sca-1+ cells, neointimal area and the ratio of neointimal area to media area at 3 weeks post-injury, and all of these responses were reduced by P2Y2R knockdown. CONCLUSIONS ATP induces Sca-1+ cell migration through the P2Y2R-Ca2+-ERK signalling pathway, and enhances proliferation through the P2Y6R-P38-MAPK signalling pathway. Both pathways are essential for vascular remodelling following injury. Video Abstract.
Collapse
Affiliation(s)
- Yiqin Cui
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China
| | - Chunshu Li
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China
| | - Xinyi Zeng
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China
| | - Xiaoyu Wei
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China
| | - Pengyun Li
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China
| | - Jun Cheng
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China
| | - Qingbo Xu
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China.
| | - Yan Yang
- Key Lab of Medical Electrophysiology of Ministry of Education and Medical Electrophysiological, 1-1 Xianglin Road, Luzhou, 646000, China.
| |
Collapse
|
15
|
Salucci S, Aramini B, Bartoletti-Stella A, Versari I, Martinelli G, Blalock W, Stella F, Faenza I. Phospholipase Family Enzymes in Lung Cancer: Looking for Novel Therapeutic Approaches. Cancers (Basel) 2023; 15:3245. [PMID: 37370855 DOI: 10.3390/cancers15123245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/07/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
Lung cancer (LC) is the second most common neoplasm in men and the third most common in women. In the last decade, LC therapies have undergone significant improvements with the advent of immunotherapy. However, the effectiveness of the available treatments remains insufficient due to the presence of therapy-resistant cancer cells. For decades, chemotherapy and radiotherapy have dominated the treatment strategy for LC; however, relapses occur rapidly and result in poor survival. Malignant lung tumors are classified as either small- or non-small-cell lung carcinoma (SCLC and NSCLC). Despite improvements in the treatment of LC in recent decades, the benefits of surgery, radiotherapy, and chemotherapy are limited, although they have improved the prognosis of LC despite the persistent low survival rate due to distant metastasis in the late stage. The identification of novel prognostic molecular markers is crucial to understand the underlying mechanisms of LC initiation and progression. The potential role of phosphatidylinositol in tumor growth and the metastatic process has recently been suggested by some researchers. Phosphatidylinositols are lipid molecules and key players in the inositol signaling pathway that have a pivotal role in cell cycle regulation, proliferation, differentiation, membrane trafficking, and gene expression. In this review, we discuss the current understanding of phosphoinositide-specific phospholipase enzymes and their emerging roles in LC.
Collapse
Affiliation(s)
- Sara Salucci
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy
| | - Beatrice Aramini
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
| | - Anna Bartoletti-Stella
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
| | - Ilaria Versari
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy
| | - Giovanni Martinelli
- Istituto Scientifico Romagnolo per lo Studio e la Cura dei Tumori (IRST) IRCCS, 47014 Meldola, Italy
| | - William Blalock
- "Luigi Luca Cavalli-Sforza'' Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerca (IGM-CNR), 40136 Bologna, Italy
- IRCCS, Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Franco Stella
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy
| | - Irene Faenza
- Department of Biomedical and NeuroMotor Sciences (DIBINEM), University of Bologna, 40126 Bologna, Italy
| |
Collapse
|
16
|
Ge C, Wang X, Wang Y, Lei L, Song G, Qian M, Wang S. PKCε inhibition prevents ischemia‑induced dendritic spine impairment in cultured primary neurons. Exp Ther Med 2023; 25:152. [PMID: 36911376 PMCID: PMC9995843 DOI: 10.3892/etm.2023.11851] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 01/31/2023] [Indexed: 02/18/2023] Open
Abstract
Brain ischemia is an independent risk factor for Alzheimer's disease (AD); however, the mechanisms underlining ischemic stroke and AD remain unclear. The present study aimed to investigate the function of the ε isoform of protein kinase C (PKCε) in brain ischemia-induced dendritic spine dysfunction to elucidate how brain ischemia causes AD. In the present study, primary hippocampus and cortical neurons were cultured while an oxygen-glucose deprivation (OGD) model was used to simulate brain ischemia. In the OGD cell model, in vitro kinase activity assay was performed to investigate whether the PKCε kinase activity changed after OGD treatment. Confocal microscopy was performed to investigate whether inhibiting PKCε kinase activity protects dendritic spine morphology and function. G-LISA was used to investigate whether small GTPases worked downstream of PKCε. The results showed that PKCε kinase activity was significantly increased following OGD treatment in primary neurons, leading to dendritic spine dysfunction. Pre-treatment with PKCε-inhibiting peptide, which blocks PKCε activity, significantly rescued dendritic spine function following OGD treatment. Furthermore, PKCε could activate Ras homolog gene family member A (RhoA) as a downstream molecule, which mediated OGD-induced dendritic spine morphology changes and caused dendritic spine dysfunction. In conclusion, the present study demonstrated that the PKCε/RhoA signalling pathway is a novel mechanism mediating brain ischemia-induced dendritic spine dysfunction. Developing therapeutic targets for this pathway may protect against and prevent brain ischemia-induced cognitive impairment and AD.
Collapse
Affiliation(s)
- Chenjie Ge
- Department of Psychiatry, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, Zhejiang 313000, P.R. China
| | - Xuefeng Wang
- WuXi AppTec Co., Ltd., Shanghai 200131, P.R. China
| | - Yunhong Wang
- WuXi AppTec Co., Ltd., Shanghai 200131, P.R. China
| | - Lilei Lei
- Department of Psychiatry, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, Zhejiang 313000, P.R. China
| | - Guohua Song
- Department of Psychiatry, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, Zhejiang 313000, P.R. China
| | - Mincai Qian
- Department of Psychiatry, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, Zhejiang 313000, P.R. China
| | - Shiliang Wang
- Department of Psychiatry, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, Zhejiang 313000, P.R. China
| |
Collapse
|
17
|
Fanourakis G, Kyrodimos E, Papanikolaou V, Chrysovergis A, Kafiri G, Papanikolaou N, Verykokakis M, Tosios K, Vastardis H. APOBEC3B Is Co-Expressed with PKCα/NF-κB in Oral and Oropharyngeal Squamous Cell Carcinomas. Diagnostics (Basel) 2023; 13:diagnostics13030569. [PMID: 36766673 PMCID: PMC9914863 DOI: 10.3390/diagnostics13030569] [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: 12/19/2022] [Revised: 01/28/2023] [Accepted: 01/29/2023] [Indexed: 02/05/2023] Open
Abstract
The enzymatic activity of APOBEC3B (A3B) has been implicated as a prime source of mutagenesis in head and neck squamous cell carcinoma (HNSCC). The expression of Protein Kinase C α (PKCα) and Nuclear Factor-κΒ p65 (NF-κΒ p65) has been linked to the activation of the classical and the non-canonical NF-κB signaling pathways, respectively, both of which have been shown to lead to the upregulation of A3B. Accordingly, the aim of the present study was to evaluate the expression of PKCα, NF-κΒ p65 and A3B in non-HPV related oral and oropharyngeal squamous cell carcinomas (SCC), by means of immunohistochemistry and in silico methods. PKCα was expressed in 29/36 (80%) cases of oral and oropharyngeal SCCs, with 25 (69%) cases showing a PKCα+/A3B+ phenotype and only 6/36 (17%) cases showing a PKCα-/A3B+ phenotype. Εxpression of NF-κB p65 was seen in 33/35 (94%) cases of oral and oropharyngeal SCCs, with 30/35 (86%) cases showing an NF-κB p65+/A3B+ phenotype and only 2/35 (6%) cases showing an NF-κB p65-/A3B+ phenotype. In addition, mRNA expression analysis, using the UALCAN database, revealed strong expression of all three genes. These findings indicate that the expression of A3B is associated with PKCα/NF-κB p65 expression and suggest a potential role for the PKC/NF-κB signaling pathway in the development of oral and oropharyngeal cancer.
Collapse
Affiliation(s)
- Galinos Fanourakis
- Department of Oral Biology, School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str., 11527 Athens, Greece
- Correspondence:
| | - Efthymios Kyrodimos
- 1st ENT Department, Hippokration Hospital, School of Medicine, National and Kapodistrian University of Athens, 114 Vasilissis Sophias Ave., 11527 Athens, Greece
| | - Vasileios Papanikolaou
- 1st ENT Department, Hippokration Hospital, School of Medicine, National and Kapodistrian University of Athens, 114 Vasilissis Sophias Ave., 11527 Athens, Greece
| | - Aristeidis Chrysovergis
- 1st ENT Department, Hippokration Hospital, School of Medicine, National and Kapodistrian University of Athens, 114 Vasilissis Sophias Ave., 11527 Athens, Greece
| | - Georgia Kafiri
- Department of Pathology, Hippokration Hospital, 114 Vasilissis Sophias Ave., 11527 Athens, Greece
| | - Nikolaos Papanikolaou
- EnzyQuest PC, Science and Technology Park of Crete, 100 Nikolaou Plastira Str., Vassilika Vouton, 70013 Heraklion, Greece
| | - Mihalis Verykokakis
- Institute for Fundamental Biomedical Research, BSRC Alexander Fleming, 34 Fleming Str., 16672 Vari, Greece
| | - Konstantinos Tosios
- Department of Oral Pathology, Medicine and Hospital Dentistry, School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str., 11527 Athens, Greece
| | - Heleni Vastardis
- Department of Orthodontics, School of Dentistry, National and Kapodistrian University of Athens, 2 Thivon Str., 11527 Athens, Greece
| |
Collapse
|
18
|
Wei Y, Awan MUN, Bai L, Bai J. The function of Golgi apparatus in LRRK2-associated Parkinson's disease. Front Mol Neurosci 2023; 16:1097633. [PMID: 36896008 PMCID: PMC9989030 DOI: 10.3389/fnmol.2023.1097633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/06/2023] [Indexed: 02/25/2023] Open
Abstract
Parkinson's disease (PD) is a chronic neurodegenerative disease associated with the intracellular organelles. Leucine-rich repeat kinase 2 (LRRK2) is a large multi-structural domain protein, and mutation in LRRK2 is associated with PD. LRRK2 regulates intracellular vesicle transport and function of organelles, including Golgi and lysosome. LRRK2 phosphorylates a group of Rab GTPases, including Rab29, Rab8, and Rab10. Rab29 acts in a common pathway with LRRK2. Rab29 has been shown to recruit LRRK2 to the Golgi complex (GC) to stimulate LRRK2 activity and alter the Golgi apparatus (GA). Interaction between LRRK2 and Vacuolar protein sorting protein 52 (VPS52), a subunit of the Golgi-associated retrograde protein (GARP) complex, mediates the function of intracellular soma trans-Golgi network (TGN) transport. VPS52 also interacts with Rab29. Knockdown of VPS52 leads to the loss of LRRK2/Rab29 transported to the TGN. Rab29, LRRK2, and VPS52 work together to regulate functions of the GA, which is associated with PD. We highlight recent advances in the roles of LRRK2, Rabs, VPS52, and other molecules, such as Cyclin-dependent kinase 5 (CDK5) and protein kinase C (PKC) in the GA, and discuss their possible association with the pathological mechanisms of PD.
Collapse
Affiliation(s)
- Yonghang Wei
- Laboratory of Molecular Neurobiology, Medical School, Kunming University of Science and Technology, Kunming, China
| | - Maher Un Nisa Awan
- Laboratory of Molecular Neurobiology, Medical School, Kunming University of Science and Technology, Kunming, China
| | - Liping Bai
- Laboratory of Molecular Neurobiology, Medical School, Kunming University of Science and Technology, Kunming, China
| | - Jie Bai
- Laboratory of Molecular Neurobiology, Medical School, Kunming University of Science and Technology, Kunming, China
| |
Collapse
|
19
|
The Effect of A2E on the Ca2+-PKC Signaling Pathway in Human RPE Cells Exposed to Blue Light. J Ophthalmol 2022; 2022:2233223. [PMID: 36304713 PMCID: PMC9596233 DOI: 10.1155/2022/2233223] [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: 03/02/2022] [Accepted: 08/30/2022] [Indexed: 11/17/2022] Open
Abstract
Aims In a model of blue light-induced damage in N-retinylidene-N-retinylethanolamine (A2E)-loaded human retinal pigment epithelial (RPE) cells, we examined the effect of A2E on the calcium (Ca2+)-protein kinase C (PKC) signaling pathway. Methods Primary human RPE cells were cultured, and the cells in the 4th–6th passages were used in this study. The cells were divided into 5 groups: control cells (no A2E, no blue light), blue light-treated cells, blue light + chloroquine-treated cells, blue light + A2E-treated cells, and blue light + A2E + chloroquine-treated cells. The cells were first treated with chloroquine (15 μM for 12 h) and then loaded with A2E (25 μM for 2 h).The blue light intensity was 2000 ± 500 lux, and the duration was 6 h. After blue light exposure, the cells were cultured for 24 h. Fluo-3/AM staining was used to determine the level of cytoplasmic Ca2+, and the cells were photographed using a laser scanning confocal microscope to analyze the fluorescence intensity. The intracellular levels of inositol triphosphate (IP3) and diacylglycerol (DAG) were measured by enzyme-linked immunosorbent assay (ELISA). Intracellular PKC activity was measured with a nonradioactive nuclide assay. Results Among all cell groups, the levels of Ca2+, DAG, and IP3 were lowest in the control cells (P < 0.05). The Ca2+, DAG, and IP3 levels in the blue light + A2E-treated cells and blue light + chloroquine-treated cells were higher than those in the blue light-treated cells (P < 0.05). The Ca2+, DAG, and IP3 levels were highest in the blue light + A2E + chloroquine-treated group (P < 0.05). PKC activity was lowest in the control cells (P < 0.05). The PKC activity of the blue light + A2E-treated cells and blue light + chloroquine-treated cells was higher than that of the blue light-treated cells (P < 0.05), and the PKC activity of the blue light + A2E + chloroquine-treated cells was the highest (P < 0.05). Conclusion Blue light and A2E increased the levels of Ca2+, IP3, and DAG in human RPE cells and enhanced PKC activity, and blue light and A2E had a synergistic effect. Chloroquine further increased the levels of Ca2+, IP3, and DAG and PKC activity in RPE cells or A2E-loaded RPE cells exposed to blue light.
Collapse
|
20
|
Heinonen S, Lautala S, Koivuniemi A, Bunker A. Insights into the behavior of unsaturated diacylglycerols in mixed lipid bilayers in relation to protein kinase C activation-A molecular dynamics simulation study. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183961. [PMID: 35568204 DOI: 10.1016/j.bbamem.2022.183961] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
The lipid second messenger diacylglycerol (DAG) is known for its involvement in many types of cellular signaling, especially as an endogenous agonist for protein kinase C (PKC). Evidence has emerged that the degree of saturation of the DAG molecules can affect PKC activation. DAG molecules with different acyl chain saturation have not only been observed to induce varying extents of PKC activation, but also to express selectivity towards different PKC isozymes. Both qualities are important for precise therapeutic activation of PKC; understanding DAG behavior at the molecular level in different environments has much potential in the development of drugs to target PKC. We used molecular dynamics simulations to study the behavior of two different unsaturated DAG species in lipid environments with varying degrees of unsaturation. We focus on phosphatidylethanolamine (PE) instead of phosphatidylcholine (PC) to more accurately model the relevant biomembranes. The effect of cholesterol (CHOL) on these systems was also explored. We found that both high level of unsaturation in the acyl chains of the DAG species and presence of CHOL in the surrounding membrane increase DAG molecule availability at the lipid-water interface. This can partially explain the previously observed differences in PKC activation strength and specificity, the complete mechanism is, however, likely to be more complex. Our simulations coupled with the current understanding of lipids highlight the need for more simulations of biologically accurate lipid environments in order to determine the correct correlations between molecular mechanisms and biological behavior when studying PKC activation.
Collapse
Affiliation(s)
- Suvi Heinonen
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland
| | - Saara Lautala
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland.
| | - Artturi Koivuniemi
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland
| | - Alex Bunker
- Drug Research Program, Division of Pharmaceutical Biosciences, University of Helsinki, FI-00014, Helsinki, Finland
| |
Collapse
|
21
|
Jubaidi FF, Zainalabidin S, Taib IS, Abdul Hamid Z, Mohamad Anuar NN, Jalil J, Mohd Nor NA, Budin SB. The Role of PKC-MAPK Signalling Pathways in the Development of Hyperglycemia-Induced Cardiovascular Complications. Int J Mol Sci 2022; 23:ijms23158582. [PMID: 35955714 PMCID: PMC9369123 DOI: 10.3390/ijms23158582] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/24/2022] [Accepted: 07/30/2022] [Indexed: 02/05/2023] Open
Abstract
Cardiovascular disease is the most common cause of death among diabetic patients worldwide. Hence, cardiovascular wellbeing in diabetic patients requires utmost importance in disease management. Recent studies have demonstrated that protein kinase C activation plays a vital role in the development of cardiovascular complications via its activation of mitogen-activated protein kinase (MAPK) cascades, also known as PKC-MAPK pathways. In fact, persistent hyperglycaemia in diabetic conditions contribute to preserved PKC activation mediated by excessive production of diacylglycerol (DAG) and oxidative stress. PKC-MAPK pathways are involved in several cellular responses, including enhancing oxidative stress and activating signalling pathways that lead to uncontrolled cardiac and vascular remodelling and their subsequent dysfunction. In this review, we discuss the recent discovery on the role of PKC-MAPK pathways, the mechanisms involved in the development and progression of diabetic cardiovascular complications, and their potential as therapeutic targets for cardiovascular management in diabetic patients.
Collapse
Affiliation(s)
- Fatin Farhana Jubaidi
- Center for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (I.S.T.); (Z.A.H.); (N.A.M.N.)
- Correspondence: (F.F.J.); (S.B.B.); Tel.: +603-9289-7645 (S.S.B.)
| | - Satirah Zainalabidin
- Center for Toxicology and Health Risk Research, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (S.Z.); (N.N.M.A.)
| | - Izatus Shima Taib
- Center for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (I.S.T.); (Z.A.H.); (N.A.M.N.)
| | - Zariyantey Abdul Hamid
- Center for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (I.S.T.); (Z.A.H.); (N.A.M.N.)
| | - Nur Najmi Mohamad Anuar
- Center for Toxicology and Health Risk Research, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (S.Z.); (N.N.M.A.)
| | - Juriyati Jalil
- Center for Drug and Herbal Development, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia;
| | - Nor Anizah Mohd Nor
- Center for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (I.S.T.); (Z.A.H.); (N.A.M.N.)
- Faculty of Health Sciences, University College MAIWP International, Kuala Lumpur 68100, Malaysia
| | - Siti Balkis Budin
- Center for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia; (I.S.T.); (Z.A.H.); (N.A.M.N.)
- Correspondence: (F.F.J.); (S.B.B.); Tel.: +603-9289-7645 (S.S.B.)
| |
Collapse
|
22
|
Nomura W, Ng SP, Takahara T, Maeda T, Kawada T, Goto T, Inoue Y. Roles of phosphatidylserine and phospholipase C in the activation of TOR complex 2 signaling in Saccharomyces cerevisiae. J Cell Sci 2022; 135:276172. [PMID: 35912799 DOI: 10.1242/jcs.259988] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 07/22/2022] [Indexed: 11/20/2022] Open
Abstract
The target of rapamycin (TOR) forms two distinct complexes, TORC1 and TORC2, to exert its functions essential for cellular growth and homeostasis. TORC1 signaling is regulated in response to nutrients such as amino acids and glucose; however, the mechanisms underlying the activation of TORC2 signaling are still poorly understood compared to TORC1 signaling. In the budding yeast Saccharomyces cerevisiae, TORC2 targets protein kinases Ypk1, Ypk2, and Pkc1 for phosphorylation. Plasma membrane stress is known to activate the TORC2-Ypk1/2 signaling. We have previously reported that methylglyoxal (MG), a metabolite derived from glycolysis, activates TORC2-Pkc1 signaling. In this study, we found that MG activates the TORC2-Ypk1/2 and TORC2-Pkc1 signaling, and that phosphatidylserine is involved in the activation of both signaling pathways. We also demonstrated that the Rho-family GTPase Cdc42 contributes to the plasma membrane stress-induced activation of TORC2-Ypk1/2 signaling. Furthermore, we revealed that phosphatidylinositol-specific phospholipase C, Plc1, contributes to the activation of both TORC2-Ypk1/2 and TORC2-Pkc1 signaling.
Collapse
Affiliation(s)
- Wataru Nomura
- Laboratory of Molecular Microbiology, Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Su-Ping Ng
- Laboratory of Molecular Functions of Food, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Terunao Takahara
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa-ku, Nagoya 464-8601, Japan
| | - Tatsuya Maeda
- Department of Biology, Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Teruo Kawada
- Laboratory of Molecular Functions of Food, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Tsuyoshi Goto
- Laboratory of Molecular Functions of Food, Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yoshiharu Inoue
- Laboratory of Molecular Microbiology, Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Uji, Kyoto 611-0011, Japan
| |
Collapse
|
23
|
Li S, Zhang X, Yao Y, Zhu Y, Zheng X, Liu F, Feng W. Inducible miR-150 Inhibits Porcine Reproductive and Respiratory Syndrome Virus Replication by Targeting Viral Genome and Suppressor of Cytokine Signaling 1. Viruses 2022; 14:v14071485. [PMID: 35891465 PMCID: PMC9318191 DOI: 10.3390/v14071485] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 07/04/2022] [Accepted: 07/04/2022] [Indexed: 12/11/2022] Open
Abstract
Hosts exploit various approaches to defend against porcine reproductive and respiratory syndrome virus (PRRSV) infection. microRNAs (miRNAs) have emerged as key negative post-transcriptional regulators of gene expression and have been reported to play important roles in regulating virus infection. Here, we identified that miR-150 was differentially expressed in virus permissive and non-permissive cells. Subsequently, we demonstrated that PRRSV induced the expression of miR-150 via activating the protein kinase C (PKC)/c-Jun amino-terminal kinases (JNK)/c-Jun pathway, and overexpression of miR-150 suppressed PRRSV replication. Further analysis revealed that miR-150 not only directly targeted the PRRSV genome, but also facilitated type I IFN signaling. RNA immunoprecipitation assay demonstrated that miR-150 targeted the suppressor of cytokine signaling 1 (SOCS1), which is a negative regulator of Janus activated kinase (JAK)/signal transducer and activator of the transcription (STAT) signaling pathway. The inverse correlation between miR-150 and SOCS1 expression implies that miR-150 plays a role in regulating ISG expression. In conclusion, miR-150 expression is upregulated upon PRRSV infection. miR-150 feedback positively targets the PRRSV genome and promotes type I IFN signaling, which can be seen as a host defensive strategy.
Collapse
Affiliation(s)
- Sihan Li
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xuan Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yao Yao
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yingqi Zhu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xiaojie Zheng
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Fang Liu
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Wenhai Feng
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China; (S.L.); (X.Z.); (Y.Y.); (Y.Z.); (X.Z.); (F.L.)
- Frontiers Science Center for Molecular Design Breeding, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Ministry of Agriculture Key Laboratory of Soil Microbiology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
- Correspondence: ; Tel.: +86-10-62733335; Fax: +86-10-62732012
| |
Collapse
|
24
|
Black JD, Affandi T, Black AR, Reyland ME. PKCα and PKCδ: Friends and Rivals. J Biol Chem 2022; 298:102194. [PMID: 35760100 PMCID: PMC9352922 DOI: 10.1016/j.jbc.2022.102194] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/13/2022] [Accepted: 06/21/2022] [Indexed: 01/06/2023] Open
Abstract
PKC comprises a large family of serine/threonine kinases that share a requirement for allosteric activation by lipids. While PKC isoforms have significant homology, functional divergence is evident among subfamilies and between individual PKC isoforms within a subfamily. Here, we highlight these differences by comparing the regulation and function of representative PKC isoforms from the conventional (PKCα) and novel (PKCδ) subfamilies. We discuss how unique structural features of PKCα and PKCδ underlie differences in activation and highlight the similar, divergent, and even opposing biological functions of these kinases. We also consider how PKCα and PKCδ can contribute to pathophysiological conditions and discuss challenges to targeting these kinases therapeutically.
Collapse
Affiliation(s)
- Jennifer D Black
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE.
| | - Trisiani Affandi
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus
| | - Adrian R Black
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE
| | - Mary E Reyland
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Anschutz Medical Campus.
| |
Collapse
|
25
|
Ho JI, Ng EY, Chiew Y, Koay YY, Chuar PF, Phang SCW, Ahmad B, Kadir KA. The effects of vitamin E on non-proliferative diabetic retinopathy in type 2 diabetes mellitus: Are they sustainable with 12 months of therapy. SAGE Open Med 2022; 10:20503121221095324. [PMID: 35652036 PMCID: PMC9150238 DOI: 10.1177/20503121221095324] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/24/2022] [Indexed: 11/20/2022] Open
Abstract
Introduction: Prolonged uncontrolled hyperglycaemia has shown to cause oxidative stress, inflammation, thrombosis and upregulation of angiogenesis in diabetics, which all contributes to diabetic retinopathy development and progression. Vitamin E is found to have anti-inflammatory, anti-oxidative, anti-thrombogenic and anti-angiogenesis which could play an important role in early treatment of diabetic retinopathy. This study aims to investigate the effect of Tocotrienol-rich vitamin E (Tocovid) on the progression of retinal microhaemorrhages and diabetic macular oedema in patients with diabetic retinopathy. Method: This is a multi-centred, randomized, double-blinded, placebo-controlled trial which involved 55 eligible participants. The participants in the treatment group (n = 22) received Tocovid 200 mg twice daily while those in the placebo group (n = 23) would receive placebo twice daily. Both groups will be on the treatment for a total duration of 12 months. Both retinal signs will be assessed at baseline, 2 months, 6 months and 12 months of treatment to determine the progression of diabetic retinopathy. Serum vascular endothelial growth factor which reflects on the angiogenesis process in the eye was analysed as well at similar time points as the retinal findings. Results: After 12 months of treatment, the placebo group had a significant increase of 23.42% in retinal microhaemorrhages (p < 0.05), but the Tocovid group had no significant changes. Moreover, the Tocovid group showed a significant decrease of 48.38% in area of diabetic macular oedema over the 12 months period (p < 0.05), but the placebo group had no significant changes. Meanwhile, there was no significant difference in serum vascular endothelial growth factor level when comparing between both groups. Conclusion: These findings could indicate that Tocovid has an important role in preventing early diabetic retinopathy progression.
Collapse
Affiliation(s)
- J-Ian Ho
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - En Yng Ng
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - Yilynn Chiew
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - Yan Yi Koay
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - Pei Fen Chuar
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - Sonia Chew Wen Phang
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - Badariah Ahmad
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| | - Khalid Abdul Kadir
- School of Medicine and Health Sciences, Monash University Malaysia, Subang Jaya, Malaysia
| |
Collapse
|
26
|
Moonwiriyakit A, Pathomthongtaweechai N, Steinhagen PR, Chantawichitwong P, Satianrapapong W, Pongkorpsakol P. Tight junctions: from molecules to gastrointestinal diseases. Tissue Barriers 2022; 11:2077620. [PMID: 35621376 PMCID: PMC10161963 DOI: 10.1080/21688370.2022.2077620] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Intestinal epithelium functions as a tissue barrier to prevent interaction between the internal compartment and the external milieu. Intestinal barrier function also determines epithelial polarity for the absorption of nutrients and the secretion of waste products. These vital functions require strong integrity of tight junction proteins. In fact, intestinal tight junctions that seal the paracellular space can restrict mucosal-to-serosal transport of hostile luminal contents. Tight junctions can form both an absolute barrier and a paracellular ion channel. Although defective tight junctions potentially lead to compromised intestinal barrier and the development and progression of gastrointestinal (GI) diseases, no FDA-approved therapies that recover the epithelial tight junction barrier are currently available in clinical practice. Here, we discuss the impacts and regulatory mechanisms of tight junction disruption in the gut and related diseases. We also provide an overview of potential therapeutic targets to restore the epithelial tight junction barrier in the GI tract.
Collapse
Affiliation(s)
- Aekkacha Moonwiriyakit
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, Thailand
| | - Nutthapoom Pathomthongtaweechai
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Samut Prakan, Thailand
| | - Peter R Steinhagen
- Department of Hepatology and Gastroenterology, Charité Medical School, Berlin, Germany
| | | | | | - Pawin Pongkorpsakol
- Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, Thailand
| |
Collapse
|
27
|
Katti SS, Krieger IV, Ann J, Lee J, Sacchettini JC, Igumenova TI. Structural anatomy of Protein Kinase C C1 domain interactions with diacylglycerol and other agonists. Nat Commun 2022; 13:2695. [PMID: 35577811 PMCID: PMC9110374 DOI: 10.1038/s41467-022-30389-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 04/28/2022] [Indexed: 11/22/2022] Open
Abstract
Diacylglycerol (DAG) is a versatile lipid whose 1,2-sn-stereoisomer serves both as second messenger in signal transduction pathways that control vital cellular processes, and as metabolic precursor for downstream signaling lipids such as phosphatidic acid. Effector proteins translocate to available DAG pools in the membranes by using conserved homology 1 (C1) domains as DAG-sensing modules. Yet, how C1 domains recognize and capture DAG in the complex environment of a biological membrane has remained unresolved for the 40 years since the discovery of Protein Kinase C (PKC) as the first member of the DAG effector cohort. Herein, we report the high-resolution crystal structures of a C1 domain (C1B from PKCδ) complexed to DAG and to each of four potent PKC agonists that produce different biological readouts and that command intense therapeutic interest. This structural information details the mechanisms of stereospecific recognition of DAG by the C1 domains, the functional properties of the lipid-binding site, and the identities of the key residues required for the recognition and capture of DAG and exogenous agonists. Moreover, the structures of the five C1 domain complexes provide the high-resolution guides for the design of agents that modulate the activities of DAG effector proteins.
Collapse
Affiliation(s)
- Sachin S. Katti
- grid.264756.40000 0004 4687 2082Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77840 USA
| | - Inna V. Krieger
- grid.264756.40000 0004 4687 2082Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77840 USA
| | - Jihyae Ann
- grid.31501.360000 0004 0470 5905College of Pharmacy, Seoul National University, Seoul, 08826 Republic of Korea
| | - Jeewoo Lee
- grid.31501.360000 0004 0470 5905College of Pharmacy, Seoul National University, Seoul, 08826 Republic of Korea
| | - James C. Sacchettini
- grid.264756.40000 0004 4687 2082Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77840 USA
| | - Tatyana I. Igumenova
- grid.264756.40000 0004 4687 2082Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77840 USA
| |
Collapse
|
28
|
Cooke M, Kazanietz MG. Overarching roles of diacylglycerol signaling in cancer development and antitumor immunity. Sci Signal 2022; 15:eabo0264. [PMID: 35412850 DOI: 10.1126/scisignal.abo0264] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Diacylglycerol (DAG) is a lipid second messenger that is generated in response to extracellular stimuli and channels intracellular signals that affect mammalian cell proliferation, survival, and motility. DAG exerts a myriad of biological functions through protein kinase C (PKC) and other effectors, such as protein kinase D (PKD) isozymes and small GTPase-regulating proteins (such as RasGRPs). Imbalances in the fine-tuned homeostasis between DAG generation by phospholipase C (PLC) enzymes and termination by DAG kinases (DGKs), as well as dysregulation in the activity or abundance of DAG effectors, have been widely associated with tumor initiation, progression, and metastasis. DAG is also a key orchestrator of T cell function and thus plays a major role in tumor immunosurveillance. In addition, DAG pathways shape the tumor ecosystem by arbitrating the complex, dynamic interaction between cancer cells and the immune landscape, hence representing powerful modifiers of immune checkpoint and adoptive T cell-directed immunotherapy. Exploiting the wide spectrum of DAG signals from an integrated perspective could underscore meaningful advances in targeted cancer therapy.
Collapse
Affiliation(s)
- Mariana Cooke
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.,Department of Medicine, Einstein Medical Center Philadelphia, Philadelphia, PA 19141, USA
| | - Marcelo G Kazanietz
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| |
Collapse
|
29
|
Zhou B, Lu Y, Zhao Z, Shi T, Wu H, Chen W, Zhang L, Zhang X. B7-H4 expression is upregulated by PKCδ activation and contributes to PKCδ-induced cell motility in colorectal cancer. Cancer Cell Int 2022; 22:147. [PMID: 35410218 PMCID: PMC8996430 DOI: 10.1186/s12935-022-02567-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 03/31/2022] [Indexed: 12/24/2022] Open
Abstract
Introduction B7-H4 is overexpressed in colorectal cancer (CRC) and plays an important role in tumor growth and immunosuppression. However, the exact mechanism that regulates B7-H4 expression remains largely unknown. Here, we investigated whether protein kinase C δ (PKCδ) regulates the expression of B7-H4 in CRC. Methods By using immunohistochemical (IHC) and immunofluorescence (IF) staining, we analyzed the expression of B7-H4 and phospho-PKCδ (p-PKCδ) in 225 colorectal tumor samples and determined the clinical significance of the expression patterns. In vitro experiments were performed with the CRC cell lines HCT116 and SW620 to detect the effect of PKCδ activation on B7-H4 expression, and xenograft-bearing mice were treated with rottlerin to monitor the expression of B7-H4 and tumor metastasis. Results The B7-H4 expression level was significantly correlated with the p-PKCδ level (r = 0.378, P < 0.001) in tumor tissues. Coexpression of p-PKCδ and B7-H4 was significantly associated with moderate/poor differentiation (P = 0.024), lymph node metastasis (P = 0.001) and advanced Dukes’ stage (P = 0.002). Western blot analysis showed that Phorbol-12-Myristate-13-Acetate (TPA) increased B7-H4 expression in a concentration-dependent manner and that rottlerin abrogated the TPA-induced increase in B7-H4 expression. The protein levels of B7-H4 and p-STAT3 were significantly reduced by a PKCδ-specific siRNA. Moreover, the STAT3 inhibitor cryptotanshinone significantly decreased the B7-H4 protein level in CRC cells. Knockdown of B7-H4 or PKCδ suppressed cell migration and motility. Rottlerin also inhibited B7-H4 expression and tumor metastasis in vivo. Conclusion The B7-H4 expression level is significantly correlated with the p-PKCδ level and tumor metastasis in CRC samples. B7-H4 expression is upregulated by STAT3 activation via PKCδ and plays roles in PKCδ-induced cancer cell motility and metastasis, suggesting that the PKCδ/STAT3/B7-H4 axis may be a potential therapeutic target for CRC. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-022-02567-1.
Collapse
Affiliation(s)
- Bin Zhou
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Gastrointestinal Tumor Immunology, Soochow University, Suzhou, Jiangsu, China
| | - Youwei Lu
- College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, China
| | - Zhiming Zhao
- College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, China
| | - Tongguo Shi
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Gastrointestinal Tumor Immunology, Soochow University, Suzhou, Jiangsu, China
| | - Hongya Wu
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Gastrointestinal Tumor Immunology, Soochow University, Suzhou, Jiangsu, China
| | - Weichang Chen
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou, Jiangsu, China.,Jiangsu Key Laboratory of Gastrointestinal Tumor Immunology, Soochow University, Suzhou, Jiangsu, China
| | - Liang Zhang
- Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou, Jiangsu, China. .,Jiangsu Key Laboratory of Gastrointestinal Tumor Immunology, Soochow University, Suzhou, Jiangsu, China. .,College of Pharmaceutical Sciences, Soochow University, Suzhou, Jiangsu, China.
| | - Xueguang Zhang
- Jiangsu Institute of Clinical Immunology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China. .,Jiangsu Key Laboratory of Clinical Immunology, Soochow University, Suzhou, Jiangsu, China. .,Jiangsu Key Laboratory of Gastrointestinal Tumor Immunology, Soochow University, Suzhou, Jiangsu, China.
| |
Collapse
|
30
|
Chaib M, Sipe LM, Yarbro JR, Bohm MS, Counts BR, Tanveer U, Pingili AK, Daria D, Marion TN, Carson JA, Thomas PG, Makowski L. PKC agonism restricts innate immune suppression, promotes antigen cross-presentation and synergizes with agonistic CD40 antibody therapy to activate CD8 + T cells in breast cancer. Cancer Lett 2022; 531:98-108. [PMID: 35074498 PMCID: PMC9867936 DOI: 10.1016/j.canlet.2022.01.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 01/01/2022] [Accepted: 01/13/2022] [Indexed: 01/26/2023]
Abstract
Myeloid-derived suppressor cells (MDSCs) are an immature innate cell population that expands in pathological conditions such as cancer and suppresses T cells via production of immunosuppressive factors. Conversely, efficient cytotoxic T cell priming is dependent on the ability of antigen-presenting cells (APCs) to cross-present tumor antigens to CD8+ T cells, a process that requires a specific subtype of dendritic cells (DCs) called conventional DC1 (cDC1) which are often dysfunctional in cancer. One way to activate cDC1 is ligation of CD40 which is abundantly expressed by myeloid cells and its agonism leads to myeloid cell activation. Thus, targeting MDSCs while simultaneously expanding cross-presenting DCs represents a promising strategy that, when combined with agonistic CD40, may result in long-lasting protective immunity. In this study, we investigated the effect of PKC agonists PEP005 and prostratin on MDSC expansion, differentiation, and recruitment to the tumor microenvironment. Our findings demonstrate that PKC agonists decreased MDSC expansion from hematopoietic progenitors and induced M-MDSC differentiation to an APC-like phenotype that expresses cDC1-related markers via activation of the p38 mitogen-activated protein kinase (MAPK) pathway. Simultaneously, PKC agonists favored cDC1 expansion at the expense of cDC2 and plasmacytoid DCs (pDC). Functionally, PKC agonists blunted MDSC suppressive activity and enhanced MDSC cross-priming capacity both in vitro and in vivo. Finally, combination of PKC agonism with agonistic CD40 mAb resulted in a marked reduction in tumor growth with a significant increase in intratumoral activated CD8+ T cells and tissue-resident memory CD8+ T cells in a syngeneic breast cancer mouse model. In sum, this work proposes a novel promising strategy to simultaneously target MDSCs and promote APC function that may have highly impactful clinical relevance in cancer patients.
Collapse
Affiliation(s)
- Mehdi Chaib
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Laura M. Sipe
- Department of Medicine, Division of Hematology and Oncology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Johnathan R. Yarbro
- Department of Medicine, Division of Hematology and Oncology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Margaret S. Bohm
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Brittany R. Counts
- Division of Regenerative and Rehabilitation Sciences, College of Health Professions, UTHSC Memphis, USA
| | - Ubaid Tanveer
- Department of Medicine, Division of Hematology and Oncology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Ajeeth K. Pingili
- Department of Medicine, Division of Hematology and Oncology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Deidre Daria
- Office of Vice Chancellor for Research, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Tony N. Marion
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA,Office of Vice Chancellor for Research, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - James A. Carson
- Division of Regenerative and Rehabilitation Sciences, College of Health Professions, UTHSC Memphis, USA,UTHSC Center for Cancer Research, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Paul G. Thomas
- Department of Microbiology, Immunology, and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA,Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN, 38105, USA,UTHSC Center for Cancer Research, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA
| | - Liza Makowski
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA,Department of Medicine, Division of Hematology and Oncology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA,Department of Microbiology, Immunology, and Biochemistry, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA,UTHSC Center for Cancer Research, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, 38163, USA,Corresponding author. Cancer Research Building Room 322, UTHSC Center for Cancer Research, University of Tennessee Health Science Center, 19 South Manassas, Memphis, TN, 38163, USA. (L. Makowski)
| |
Collapse
|
31
|
Aghanoori MR, Agarwal P, Gauvin E, Nagalingam RS, Bonomo R, Yathindranath V, Smith DR, Hai Y, Lee S, Jolivalt CG, Calcutt NA, Jones MJ, Czubryt MP, Miller DW, Dolinsky VW, Mansuy-Aubert V, Fernyhough P. CEBPβ regulation of endogenous IGF-1 in adult sensory neurons can be mobilized to overcome diabetes-induced deficits in bioenergetics and axonal outgrowth. Cell Mol Life Sci 2022; 79:193. [PMID: 35298717 PMCID: PMC8930798 DOI: 10.1007/s00018-022-04201-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/28/2022] [Accepted: 02/08/2022] [Indexed: 11/26/2022]
Abstract
Aberrant insulin-like growth factor 1 (IGF-1) signaling has been proposed as a contributing factor to the development of neurodegenerative disorders including diabetic neuropathy, and delivery of exogenous IGF-1 has been explored as a treatment for Alzheimer's disease and amyotrophic lateral sclerosis. However, the role of autocrine/paracrine IGF-1 in neuroprotection has not been well established. We therefore used in vitro cell culture systems and animal models of diabetic neuropathy to characterize endogenous IGF-1 in sensory neurons and determine the factors regulating IGF-1 expression and/or affecting neuronal health. Single-cell RNA sequencing (scRNA-Seq) and in situ hybridization analyses revealed high expression of endogenous IGF-1 in non-peptidergic neurons and satellite glial cells (SGCs) of dorsal root ganglia (DRG). Brain cortex and DRG had higher IGF-1 gene expression than sciatic nerve. Bidirectional transport of IGF-1 along sensory nerves was observed. Despite no difference in IGF-1 receptor levels, IGF-1 gene expression was significantly (P < 0.05) reduced in liver and DRG from streptozotocin (STZ)-induced type 1 diabetic rats, Zucker diabetic fatty (ZDF) rats, mice on a high-fat/ high-sugar diet and db/db type 2 diabetic mice. Hyperglycemia suppressed IGF-1 gene expression in cultured DRG neurons and this was reversed by exogenous IGF-1 or the aldose reductase inhibitor sorbinil. Transcription factors, such as NFAT1 and CEBPβ, were also less enriched at the IGF-1 promoter in DRG from diabetic rats vs control rats. CEBPβ overexpression promoted neurite outgrowth and mitochondrial respiration, both of which were blunted by knocking down or blocking IGF-1. Suppression of endogenous IGF-1 in diabetes may contribute to neuropathy and its upregulation at the transcriptional level by CEBPβ can be a promising therapeutic approach.
Collapse
MESH Headings
- Aging/metabolism
- Animals
- Antibodies, Neutralizing/pharmacology
- Axons/drug effects
- Axons/metabolism
- Axons/pathology
- Base Sequence
- CCAAT-Enhancer-Binding Protein-beta/genetics
- CCAAT-Enhancer-Binding Protein-beta/metabolism
- Cell Respiration/drug effects
- Cells, Cultured
- Diabetes Mellitus, Experimental/genetics
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Type 1/genetics
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 2/genetics
- Diabetes Mellitus, Type 2/pathology
- Energy Metabolism/drug effects
- Ganglia, Spinal/drug effects
- Ganglia, Spinal/metabolism
- Gene Expression Regulation/drug effects
- Glycolysis/drug effects
- HEK293 Cells
- Humans
- Insulin-Like Growth Factor I/genetics
- Insulin-Like Growth Factor I/metabolism
- Liver/metabolism
- Male
- Mitochondria/drug effects
- Mitochondria/metabolism
- NFATC Transcription Factors/metabolism
- Neuronal Outgrowth/drug effects
- Polymers/metabolism
- Promoter Regions, Genetic/genetics
- Protein Transport/drug effects
- Rats, Sprague-Dawley
- Sensory Receptor Cells/metabolism
- Sensory Receptor Cells/pathology
- Signal Transduction/drug effects
- Rats
Collapse
Affiliation(s)
- Mohamad-Reza Aghanoori
- Division of Neurodegenerative Disorders, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada.
- Dept of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB, Canada.
- Dept of Medical Genetics, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N2, Canada.
| | - Prasoon Agarwal
- Dept of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB, Canada
- Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada
- School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Evan Gauvin
- Division of Neurodegenerative Disorders, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
| | - Raghu S Nagalingam
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
| | - Raiza Bonomo
- Cellular and Molecular Department, Stritch School of Medicine, Loyola University Chicago, Chicago, USA
| | - Vinith Yathindranath
- Kleysen Institute for Advanced Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Darrell R Smith
- Division of Neurodegenerative Disorders, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
| | - Yan Hai
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Samantha Lee
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | | | | | - Meaghan J Jones
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Michael P Czubryt
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
| | - Donald W Miller
- Kleysen Institute for Advanced Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Vernon W Dolinsky
- Dept of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB, Canada
- Children's Hospital Research Institute of Manitoba, University of Manitoba, Winnipeg, MB, Canada
| | - Virginie Mansuy-Aubert
- Cellular and Molecular Department, Stritch School of Medicine, Loyola University Chicago, Chicago, USA
| | - Paul Fernyhough
- Division of Neurodegenerative Disorders, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB, Canada
- Dept of Pharmacology and Therapeutics, University of Manitoba, Winnipeg, MB, Canada
| |
Collapse
|
32
|
Gu SH, Chen CH, Lin PL. Protein kinase C signalling involved in prothoracicotropic hormone-stimulated prothoracic glands in the silkworm, Bombyx mori. INSECT MOLECULAR BIOLOGY 2022; 31:115-126. [PMID: 34709697 DOI: 10.1111/imb.12744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 09/27/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
In the present study, the participation of protein kinase C (PKC) signalling in prothoracicotropic hormone (PTTH)-stimulated ecdysteroidogenesis in Bombyx prothoracic glands (PGs) is demonstrated and characterized. PTTH stimulated phosphorylation of a 37-kDa protein in Bombyx PGs both in vitro and in vivo, as recognized by a PKC substrate antibody. Treatment with either A23187 or thapsigargin also stimulated this 37-kDa protein phosphorylation. PTTH-stimulated phosphorylation of the 37-kDa protein was markedly attenuated in the absence of Ca2+ . The phospholipase C (PLC) inhibitor, U73122, greatly inhibited PTTH-stimulated phosphorylation of this protein, indicating the involvement of Ca2+ and PLC. A mitogen-activated protein kinase/extracellular signal-regulated kinase (ERK) kinase (MEK) inhibitor (U0126), a phosphoinositide 3-kinase (PI3K) inhibitor (LY294002) and a chemical activator of adenosine 5'-monophosphate-activated protein kinase (AMPK) (5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside) did not affect PTTH-stimulated phosphorylation of the 37-kDa protein, implying that ERK and PI3K/AMPK are not the upstream signalling pathways for PKC-dependent protein phosphorylation. The mitochondrial oxidative phosphorylation inhibitors (the uncoupler carbonyl cyanide p-trifluoromethoxyphenylhydrazone and diphenylene iodonium) inhibited PTTH-stimulated phosphorylation of the 37-kDa protein, indicating its redox regulation. Treatment with PKC inhibitors (either calphostin C, chelerythrine C or rottlerin) reduced PTTH-stimulated phosphorylation of the 37-kDa protein. PTTH-stimulated ecdysteroidogenesis was also inhibited by treatment with rottlerin, thus further confirming participation of PKC-dependent phosphorylation in PTTH signalling. From these results, we demonstrated that redox-regulated PTTH-stimulated PKC signalling is involved in ecdysteroid secretion in Bombyx PGs.
Collapse
Affiliation(s)
- S-H Gu
- Department of Biology, National Museum of Natural Science, Taichung, Taiwan
| | - C-H Chen
- Chung Hwa University of Medical Technology, Tainan, Taiwan
| | - P-L Lin
- Department of Biology, National Museum of Natural Science, Taichung, Taiwan
| |
Collapse
|
33
|
Viet NM, Wang T, Tran-Anh K, Sugihara I. Heterogeneity of intrinsic plasticity in cerebellar Purkinje cells linked with cortical molecular zones. iScience 2022; 25:103705. [PMID: 35059609 PMCID: PMC8760437 DOI: 10.1016/j.isci.2021.103705] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/26/2021] [Accepted: 12/23/2021] [Indexed: 11/28/2022] Open
Abstract
In the cerebellar cortex, heterogeneous populations of Purkinje cells (PCs), classified into zebrin (aldolase C)-positive (Z+) and -negative (Z-) types, are arranged into separate longitudinal zones. They have different topographic neuronal connections and show different patterns of activity in behavior tasks. However, whether the zebrin type of PCs directly links with the physiological properties of the PC has not been well clarified. Therefore, we applied in vitro whole-cell patch-clamp recording in Z+ and Z- PCs in vermal and hemispheric neighboring zebrin zones in zebrin-visualized mice. Intrinsic excitability is significantly higher in Z- PCs than in Z+ PCs. Furthermore, intrinsic plasticity and synaptic long-term potentiation are enhanced more in Z- PCs than in Z+ PCs. The difference was mediated by different modulation of SK channel activities between Z+ and Z- PCs. The results indicate that cellular physiology differentially tunes to the functional compartmentalization of heterogeneous PCs.
Collapse
Affiliation(s)
- Nguyen-Minh Viet
- Department of Systems Neurophysiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Tianzhuo Wang
- Department of Systems Neurophysiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Khoa Tran-Anh
- Department of Systems Neurophysiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Izumi Sugihara
- Department of Systems Neurophysiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Center for Brain Integration Research, Tokyo Medical and Dental University, Tokyo, Japan
| |
Collapse
|
34
|
Vietri Rudan M, Watt FM. Mammalian Epidermis: A Compendium of Lipid Functionality. Front Physiol 2022; 12:804824. [PMID: 35095565 PMCID: PMC8791442 DOI: 10.3389/fphys.2021.804824] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/13/2021] [Indexed: 11/13/2022] Open
Abstract
Mammalian epidermis is a striking example of the role of lipids in tissue biology. In this stratified epithelium, highly specialized structures are formed that leverage the hydrophobic properties of lipids to form an impermeable barrier and protect the humid internal environment of the body from the dry outside. This is achieved through tightly regulated lipid synthesis that generates the molecular species unique to the tissue. Beyond their fundamental structural role, lipids are involved in the active protection of the body from external insults. Lipid species present on the surface of the body possess antimicrobial activity and directly contribute to shaping the commensal microbiota. Lipids belonging to a variety of classes are also involved in the signaling events that modulate the immune responses to environmental stress as well as differentiation of the epidermal keratinocytes themselves. Recently, high-resolution methods are beginning to provide evidence for the involvement of newly identified specific lipid molecules in the regulation of epidermal homeostasis. In this review we give an overview of the wide range of biological functions of mammalian epidermal lipids.
Collapse
|
35
|
Ghareghomi S, Rahban M, Moosavi-Movahedi Z, Habibi-Rezaei M, Saso L, Moosavi-Movahedi AA. The Potential Role of Curcumin in Modulating the Master Antioxidant Pathway in Diabetic Hypoxia-Induced Complications. Molecules 2021; 26:molecules26247658. [PMID: 34946740 PMCID: PMC8706440 DOI: 10.3390/molecules26247658] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/09/2021] [Accepted: 12/13/2021] [Indexed: 12/13/2022] Open
Abstract
Oxidative stress is the leading player in the onset and development of various diseases. The Keap1-Nrf2 pathway is a pivotal antioxidant system that preserves the cells' redox balance. It decreases inflammation in which the nuclear trans-localization of Nrf2 as a transcription factor promotes various antioxidant responses in cells. Through some other directions and regulatory proteins, this pathway plays a fundamental role in preventing several diseases and reducing their complications. Regulation of the Nrf2 pathway occurs on transcriptional and post-transcriptional levels, and these regulations play a significant role in its activity. There is a subtle correlation between the Nrf2 pathway and the pivotal signaling pathways, including PI3 kinase/AKT/mTOR, NF-κB and HIF-1 factors. This demonstrates its role in the development of various diseases. Curcumin is a yellow polyphenolic compound from Curcuma longa with multiple bioactivities, including antioxidant, anti-inflammatory, anti-tumor, and anti-viral activities. Since hyperglycemia and increased reactive oxygen species (ROS) are the leading causes of common diabetic complications, reducing the generation of ROS can be a fundamental approach to dealing with these complications. Curcumin can be considered a potential treatment option by creating an efficient therapeutic to counteract ROS and reduce its detrimental effects. This review discusses Nrf2 pathway regulation at different levels and its correlation with other important pathways and proteins in the cell involved in the progression of diabetic complications and targeting these pathways by curcumin.
Collapse
Affiliation(s)
- Somayyeh Ghareghomi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417466191, Iran; (S.G.); (M.R.)
| | - Mahdie Rahban
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417466191, Iran; (S.G.); (M.R.)
| | | | - Mehran Habibi-Rezaei
- School of Biology, College of Science, University of Tehran, Tehran 1417466191, Iran
- Center of Excellence in NanoBiomedicine, University of Tehran, Tehran 1417466191, Iran
- Correspondence: (M.H.-R.); (A.A.M.-M.); Tel.: +98-21-6111-3214 (M.H.-R.); +98-21-6111-3381 (A.A.M.-M.); Fax: +98-21-6697-1941 (M.H.-R.); +98-21-6640-4680 (A.A.M.-M.)
| | - Luciano Saso
- Department of Physiology and Pharmacology “Vittorio Erspamer,” Sapienza University of Rome, 00185 Rome, Italy;
| | - Ali Akbar Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417466191, Iran; (S.G.); (M.R.)
- UNESCO Chair on Interdisciplinary Research in Diabetes, University of Tehran, Tehran 1417466191, Iran
- Correspondence: (M.H.-R.); (A.A.M.-M.); Tel.: +98-21-6111-3214 (M.H.-R.); +98-21-6111-3381 (A.A.M.-M.); Fax: +98-21-6697-1941 (M.H.-R.); +98-21-6640-4680 (A.A.M.-M.)
| |
Collapse
|
36
|
Unraveling the hidden role of a uORF-encoded peptide as a kinase inhibitor of PKCs. Proc Natl Acad Sci U S A 2021; 118:2018899118. [PMID: 34593629 PMCID: PMC8501901 DOI: 10.1073/pnas.2018899118] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2021] [Indexed: 02/01/2023] Open
Abstract
Approximately 40% of human messenger RNAs (mRNAs) contain upstream open reading frames (uORFs) in their 5' untranslated regions. Some of these uORF sequences, thought to attenuate scanning ribosomes or lead to mRNA degradation, were recently shown to be translated, although the function of the encoded peptides remains unknown. Here, we show a uORF-encoded peptide that exhibits kinase inhibitory functions. This uORF, upstream of the protein kinase C-eta (PKC-η) main ORF, encodes a peptide (uPEP2) containing the typical PKC pseudosubstrate motif present in all PKCs that autoinhibits their kinase activity. We show that uPEP2 directly binds to and selectively inhibits the catalytic activity of novel PKCs but not of classical or atypical PKCs. The endogenous deletion of uORF2 or its overexpression in MCF-7 cells revealed that the endogenously translated uPEP2 reduces the protein levels of PKC-η and other novel PKCs and restricts cell proliferation. Functionally, treatment of breast cancer cells with uPEP2 diminished cell survival and their migration and synergized with chemotherapy by interfering with the response to DNA damage. Furthermore, in a xenograft of MDA-MB-231 breast cancer tumor in mice models, uPEP2 suppressed tumor progression, invasion, and metastasis. Tumor histology showed reduced proliferation, enhanced cell death, and lower protein expression levels of novel PKCs along with diminished phosphorylation of PKC substrates. Hence, our study demonstrates that uORFs may encode biologically active peptides beyond their role as translation regulators of their downstream ORFs. Together, we point to a unique function of a uORF-encoded peptide as a kinase inhibitor, pertinent to cancer therapy.
Collapse
|
37
|
Zhang M, Otsuki K, Kikuchi T, Bai ZS, Zhou D, Huang L, Chen CH, Morris-Natschke SL, Lee KH, Li N, Koike K, Li W. LC-MS Identification, Isolation, and Structural Elucidation of Anti-HIV Tigliane Diterpenoids from Wikstroemia lamatsoensis. JOURNAL OF NATURAL PRODUCTS 2021; 84:2366-2373. [PMID: 34445872 DOI: 10.1021/acs.jnatprod.1c00570] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Structurally diverse tigliane diterpenoids have drawn significant research interest for drug discovery over many decades. Using LC-MS-guided fractionation and separation, the first phytochemical investigation on Wikstroemia lamatsoensis led to the isolation of eight tiglianes (1-8), including two new compounds, wikstrocin D (1) and wikstrocin E (2). The new structures were elucidated based on extensive physicochemical and spectroscopic analyses. The characteristic ESIMS/MS fragmentations of tiglianes 1-8 were also summarized. Among the isolated tiglianes, three compounds (8, 5, and 7) showed the most potent anti-HIV activity, with IC50 values of 0.18, 3.8, and 12.8 nM, respectively.
Collapse
Affiliation(s)
- Mi Zhang
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan
| | - Kouharu Otsuki
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan
| | - Takashi Kikuchi
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan
| | - Zi-Song Bai
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Di Zhou
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Li Huang
- Surgical Science, Department of Surgery, Duke University Medical Center, Durham, North Carolina 27710, United States
| | - Chin-Ho Chen
- Surgical Science, Department of Surgery, Duke University Medical Center, Durham, North Carolina 27710, United States
| | - Susan L Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
- Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung 404, Taiwan
| | - Ning Li
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, People's Republic of China
| | - Kazuo Koike
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan
| | - Wei Li
- Faculty of Pharmaceutical Sciences, Toho University, Miyama 2-2-1, Funabashi, Chiba 274-8510, Japan
| |
Collapse
|
38
|
Papa P, Whitefield B, Mortensen DS, Cashion D, Huang D, Torres E, Parnes J, Sapienza J, Hansen J, Correa M, Delgado M, Harris R, Hegde S, Norris S, Bahmanyar S, Plantevin-Krenitsky V, Liu Z, Leftheris K, Kulkarni A, Bennett B, Hur EM, Ringheim G, Khambatta G, Chan H, Muir J, Blease K, Burnett K, LeBrun L, Morrison L, Celeridad M, Khattri R, Cathers BE. Discovery of the Selective Protein Kinase C-θ Kinase Inhibitor, CC-90005. J Med Chem 2021; 64:11886-11903. [PMID: 34355886 DOI: 10.1021/acs.jmedchem.1c00388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The PKC-θ isoform of protein kinase C is selectively expressed in T lymphocytes and plays an important role in the T cell antigen receptor (TCR)-triggered activation of mature T cells, T cell proliferation, and the subsequent release of cytokines such as interleukin-2 (IL-2). Herein, we report the synthesis and structure-activity relationship (SAR) of a novel series of PKC-θ inhibitors. Through a combination of structure-guided design and exploratory SAR, suitable replacements for the basic C4 amine of the original lead (3) were identified. Property-guided design enabled the identification of appropriately substituted C2 groups to afford potent analogs with metabolic stability and permeability to support in vivo testing. With exquisite general kinase selectivity, cellular inhibition of T cell activation as assessed by IL-2 expression, a favorable safety profile, and demonstrated in vivo efficacy in models of acute and chronic T cell activation with oral dosing, CC-90005 (57) was selected for clinical development.
Collapse
Affiliation(s)
- Patrick Papa
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Brandon Whitefield
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Deborah S Mortensen
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Dan Cashion
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Dehua Huang
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Eduardo Torres
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Jason Parnes
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - John Sapienza
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Joshua Hansen
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Matthew Correa
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Mercedes Delgado
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Roy Harris
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Sayee Hegde
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Stephen Norris
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Sogole Bahmanyar
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | | | - Zheng Liu
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Katerina Leftheris
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Ashutosh Kulkarni
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Brydon Bennett
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Eun Mi Hur
- Bristol Myers Squibb, 86 Morris Avenue, Summit, New Jersey 07901, United States
| | - Garth Ringheim
- Bristol Myers Squibb, 86 Morris Avenue, Summit, New Jersey 07901, United States
| | - Godrej Khambatta
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Henry Chan
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Jeffrey Muir
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Kate Blease
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Kelven Burnett
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Laurie LeBrun
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Lisa Morrison
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Maria Celeridad
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Roli Khattri
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| | - Brian E Cathers
- Bristol Myers Squibb, 10300 Campus Point Drive, Suite 100, San Diego, California 92121, United States
| |
Collapse
|
39
|
Ochoa ELM. Lithium as a Neuroprotective Agent for Bipolar Disorder: An Overview. Cell Mol Neurobiol 2021; 42:85-97. [PMID: 34357564 DOI: 10.1007/s10571-021-01129-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 07/14/2021] [Indexed: 11/28/2022]
Abstract
Lithium (Li+) is a first option treatment for adult acute episodes of Bipolar Disorder (BD) and for the prophylaxis of new depressed or manic episodes. It is also the preferred choice as maintenance treatment. Numerous studies have shown morphological abnormalities in the brains of BD patients, suggesting that this highly heritable disorder may exhibit progressive and deleterious changes in brain structure. Since treatment with Li+ ameliorates these abnormalities, it has been postulated that Li+ is a neuroprotective agent in the same way atypical antipsychotics are neuroprotective in patients diagnosed with schizophrenia spectrum disorders. Li+'s neuroprotective properties are related to its modulation of nerve growth factors, inflammation, mitochondrial function, oxidative stress, and programmed cell death mechanisms such as autophagy and apoptosis. Notwithstanding, it is not known whether Li+-induced neuroprotection is related to the inhibition of its putative molecular targets in a BD episode: the enzymes inositol-monophosphatase, (IMPase), glycogen-synthase-kinase 3β (GSK3), and Protein kinase C (PKC). Furthermore, it is uncertain whether these neuroprotective mechanisms are correlated with Li+'s clinical efficacy in maintaining mood stability. It is expected that in a nearby future, precision medicine approaches will improve diagnosis and expand treatment options. This will certainly contribute to ameliorating the medical and economic burden created by this devastating mood disorder.
Collapse
Affiliation(s)
- Enrique L M Ochoa
- Department of Psychiatry and Behavioral Sciences, Volunteer Clinical Faculty, University of California at Davis, 2230 Stockton Boulevard, Sacramento, CA, 95817, USA.
| |
Collapse
|
40
|
Abstract
Phospholipase C γ1 (PLCγ1) is a member of the PLC family that functions as signal transducer by hydrolyzing membrane lipid to generate second messengers. The unique protein structure of PLCγ1 confers a critical role as a direct effector of VEGFR2 and signaling mediated by other receptor tyrosine kinases. The distinct vascular phenotypes in PLCγ1-deficient animal models and the gain-of-function mutations of PLCγ1 found in human endothelial cancers point to a major physiological role of PLCγ1 in the endothelial system. In this review, we discuss aspects of physiological and molecular function centering around PLCγ1 in the context of endothelial cells and provide a perspective for future investigation.
Collapse
Affiliation(s)
- Dongying Chen
- Yale Cardiovascular Research Center, Departments of Internal Medicine and Cell Biology, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Michael Simons
- Yale Cardiovascular Research Center, Departments of Internal Medicine and Cell Biology, Yale University School of Medicine, New Haven, CT 06511, USA.
| |
Collapse
|
41
|
Garcia-Concejo A, Larhammar D. Protein kinase C family evolution in jawed vertebrates. Dev Biol 2021; 479:77-90. [PMID: 34329618 DOI: 10.1016/j.ydbio.2021.07.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 07/02/2021] [Accepted: 07/22/2021] [Indexed: 11/18/2022]
Abstract
Protein kinase C (PKC) was one of the first kinases identified in human cells. It is now known to constitute a family of kinases that respond to diacylglycerol, phosphatidylserine and for some family members, Ca2+. They have a plethora of different functions, such as cell cycle regulation, immune response and memory formation. In mammals, 12 PKC family members have been described, usually divided into 4 different subfamilies. We present here a comprehensive evolutionary analysis of the PKC genes in jawed vertebrates with special focus on the impact of the two tetraploidizations (1R and 2R) before the radiation of jawed vertebrates and the teleost tetraploidization (3R), as illuminated by synteny and paralogon analysis including many neighboring gene families. We conclude that the vertebrate predecessor had five PKC genes, as tunicates and lancelets still do, and that the PKC family should therefore ideally be organized into five subfamilies. The 1R and 2R events led to a total of 12 genes distributed among these five subfamilies. All 12 genes are still present in some of the major lineages of jawed vertebrates, including mammals, whereas birds and cartilaginous fishes have lost one member. The 3R event added another nine genes in teleosts, bringing the total to 21 genes. The zebrafish, a common experimental model animal, has retained 19. We have found no independent gene duplications. Thus, the genome doublings completely account for the complexity of this gene family in jawed vertebrates and have thereby had a huge impact on their evolution.
Collapse
Affiliation(s)
- Adrian Garcia-Concejo
- Department of Neuroscience, Unit of Pharmacology, Science for Life Laboratory, Uppsala University, Box 593, SE-751 24, Uppsala, Sweden.
| | - Dan Larhammar
- Department of Neuroscience, Unit of Pharmacology, Science for Life Laboratory, Uppsala University, Box 593, SE-751 24, Uppsala, Sweden
| |
Collapse
|
42
|
Chen L, Shi D, Guo M. The roles of PKC-δ and PKC-ε in myocardial ischemia/reperfusion injury. Pharmacol Res 2021; 170:105716. [PMID: 34102229 DOI: 10.1016/j.phrs.2021.105716] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 05/01/2021] [Accepted: 06/03/2021] [Indexed: 01/14/2023]
Abstract
Ischemia and reperfusion (I/R) cause a reduction in arterial blood supply to tissues, followed by the restoration of perfusion and consequent reoxygenation. The reestablishment of blood flow triggers further damage to ischemic tissue through reactive oxygen species (ROS) accumulation, interference with cellular ion homeostasis, opening of mitochondrial permeability transition pores (mPTPs) and promotion of cell death (apoptosis or necrosis). PKC-δ and PKC-ε, belonging to a family of serine/threonine kinases, have been demonstrated to play important roles during I/R injury in cardiovascular diseases. However, the cardioprotective mechanisms of PKC-δ and PKC-ε in I/R injury have not been elaborated until now. This article discusses the roles of PKC-δ and PKC-ε during myocardial I/R in redox regulation (redox signaling and oxidative stress), cell death (apoptosis and necrosis), Ca2+ overload, and mitochondrial dysfunction.
Collapse
Affiliation(s)
- Li Chen
- Peking University Traditional Chinese Medicine Clinical Medical School (Xi yuan), Beijing, China; National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Dazhuo Shi
- National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.
| | - Ming Guo
- National Clinical Research Center for Chinese Medicine Cardiology, Xiyuan Hospital, China Academy of Chinese Medical Sciences, Beijing, China.
| |
Collapse
|
43
|
mGluR1 signaling in cerebellar Purkinje cells: Subcellular organization and involvement in cerebellar function and disease. Neuropharmacology 2021; 194:108629. [PMID: 34089728 DOI: 10.1016/j.neuropharm.2021.108629] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 11/20/2022]
Abstract
The cerebellum is essential for the control, coordination, and learning of movements, and for certain aspects of cognitive function. Purkinje cells are the sole output neurons in the cerebellar cortex and therefore play crucial roles in the diverse functions of the cerebellum. The type 1 metabotropic glutamate receptor (mGluR1) is prominently enriched in Purkinje cells and triggers downstream signaling pathways that are required for functional and structural plasticity, and for synaptic responses. To understand how mGluR1 contributes to cerebellar functions, it is important to consider not only the operational properties of this receptor, but also its spatial organization and the molecular interactions that enable its proper functioning. In this review, we highlight how mGluR1 and its related signaling molecules are organized into tightly coupled microdomains to fulfill physiological functions. We also describe emerging evidence that altered mGluR1 signaling in Purkinje cells underlies cerebellar dysfunction in ataxias of human patients and mouse models.
Collapse
|
44
|
Ryota H, Ishida M, Ebisu Y, Yanagimoto H, Yamamoto T, Kosaka H, Hirooka S, Yamaki S, Kotsuka M, Matsui Y, Tsuta K, Satoi S. Clinicopathological characteristics of pancreatic ductal adenocarcinoma with invasive micropapillary carcinoma component with emphasis on the usefulness of PKCζ immunostaining for detection of reverse polarity. Oncol Lett 2021; 22:525. [PMID: 34055090 PMCID: PMC8138900 DOI: 10.3892/ol.2021.12786] [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: 02/01/2019] [Accepted: 02/17/2020] [Indexed: 11/21/2022] Open
Abstract
Invasive micropapillary carcinoma (IMPC) is a rare distinct histopathological subtype, characterized by the presence of carcinoma cells displaying reverse polarity. Only limited clinicopathological information is available regarding pancreatic IMPC. The aim of the present study was to clarify the clinicopathological features of pancreatic IMPC and the usefulness of protein kinase C (PKC)ζ immunostaining for the detection of reverse polarity. We reviewed 242 consecutive surgically resected specimens of pancreatic ductal adenocarcinoma and selected samples with an IMPC component. Clinicopathological characteristics were compared between the IMPC and non-IMPC groups. Immunohistochemical staining for PKCζ was performed using an autostainer. In total, 14 cases had an IMPC component (5.8%). The extent of IMPC component ranged from 5 to 20%. There were no significant differences in tumor location, T category, lymph node metastatic status, preoperative carbohydrate antigen 19-9 level, resection status and overall survival between the IMPC and non-IMPC groups. Immunostaining for PKCζ clearly showed reverse polarity of the neoplastic cells of IMPC. Although previous reports have shown that the presence of an IMPC component (>20% of the tumor) indicated poor prognosis, the present study demonstrated that presence of IMPC <20% did not suggest a worse prognosis.
Collapse
Affiliation(s)
- Hironori Ryota
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Mitsuaki Ishida
- Department of Pathology and Laboratory Medicine, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Yusuke Ebisu
- Department of Pathology and Laboratory Medicine, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Hiroaki Yanagimoto
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Tomohisa Yamamoto
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Hisashi Kosaka
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Satoshi Hirooka
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - So Yamaki
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Masaya Kotsuka
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Yoichi Matsui
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Koji Tsuta
- Department of Pathology and Laboratory Medicine, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| | - Sohei Satoi
- Department of Surgery, Kansai Medical University, Hirakata, Osaka 573-1010, Japan
| |
Collapse
|
45
|
Camblor-Perujo S, Kononenko NL. Brain-specific functions of the endocytic machinery. FEBS J 2021; 289:2219-2246. [PMID: 33896112 DOI: 10.1111/febs.15897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/29/2021] [Indexed: 12/12/2022]
Abstract
Endocytosis is an essential cellular process required for multiple physiological functions, including communication with the extracellular environment, nutrient uptake, and signaling by the cell surface receptors. In a broad sense, endocytosis is accomplished through either constitutive or ligand-induced invagination of the plasma membrane, which results in the formation of the plasma membrane-retrieved endocytic vesicles, which can either be sent for degradation to the lysosomes or recycled back to the PM. This additional function of endocytosis in membrane retrieval has been adopted by excitable cells, such as neurons, for membrane equilibrium maintenance at synapses. The last two decades were especially productive with respect to the identification of brain-specific functions of the endocytic machinery, which additionally include but not limited to regulation of neuronal differentiation and migration, maintenance of neuron morphology and synaptic plasticity, and prevention of neurotoxic aggregates spreading. In this review, we highlight the current knowledge of brain-specific functions of endocytic machinery with a specific focus on three brain cell types, neuronal progenitor cells, neurons, and glial cells.
Collapse
Affiliation(s)
| | - Natalia L Kononenko
- CECAD Cluster of Excellence, University of Cologne, Germany.,Center for Physiology & Pathophysiology, Medical Faculty, University of Cologne, Germany
| |
Collapse
|
46
|
Targeting Protein Kinase C in Glioblastoma Treatment. Biomedicines 2021; 9:biomedicines9040381. [PMID: 33916593 PMCID: PMC8067000 DOI: 10.3390/biomedicines9040381] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/29/2021] [Accepted: 03/31/2021] [Indexed: 12/24/2022] Open
Abstract
Glioblastoma (GBM) is the most frequent and aggressive primary brain tumor and is associated with a poor prognosis. Despite the use of combined treatment approaches, recurrence is almost inevitable and survival longer than 14 or 15 months after diagnosis is low. It is therefore necessary to identify new therapeutic targets to fight GBM progression and recurrence. Some publications have pointed out the role of glioma stem cells (GSCs) as the origin of GBM. These cells, with characteristics of neural stem cells (NSC) present in physiological neurogenic niches, have been proposed as being responsible for the high resistance of GBM to current treatments such as temozolomide (TMZ). The protein Kinase C (PKC) family members play an essential role in transducing signals related with cell cycle entrance, differentiation and apoptosis in NSC and participate in distinct signaling cascades that determine NSC and GSC dynamics. Thus, PKC could be a suitable druggable target to treat recurrent GBM. Clinical trials have tested the efficacy of PKCβ inhibitors, and preclinical studies have focused on other PKC isozymes. Here, we discuss the idea that other PKC isozymes may also be involved in GBM progression and that the development of a new generation of effective drugs should consider the balance between the activation of different PKC subtypes.
Collapse
|
47
|
Ottolini M, Sonkusare SK. The Calcium Signaling Mechanisms in Arterial Smooth Muscle and Endothelial Cells. Compr Physiol 2021; 11:1831-1869. [PMID: 33792900 PMCID: PMC10388069 DOI: 10.1002/cphy.c200030] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The contractile state of resistance arteries and arterioles is a crucial determinant of blood pressure and blood flow. Physiological regulation of arterial contractility requires constant communication between endothelial and smooth muscle cells. Various Ca2+ signals and Ca2+ -sensitive targets ensure dynamic control of intercellular communications in the vascular wall. The functional effect of a Ca2+ signal on arterial contractility depends on the type of Ca2+ -sensitive target engaged by that signal. Recent studies using advanced imaging methods have identified the spatiotemporal signatures of individual Ca2+ signals that control arterial and arteriolar contractility. Broadly speaking, intracellular Ca2+ is increased by ion channels and transporters on the plasma membrane and endoplasmic reticular membrane. Physiological roles for many vascular Ca2+ signals have already been confirmed, while further investigation is needed for other Ca2+ signals. This article focuses on endothelial and smooth muscle Ca2+ signaling mechanisms in resistance arteries and arterioles. We discuss the Ca2+ entry pathways at the plasma membrane, Ca2+ release signals from the intracellular stores, the functional and physiological relevance of Ca2+ signals, and their regulatory mechanisms. Finally, we describe the contribution of abnormal endothelial and smooth muscle Ca2+ signals to the pathogenesis of vascular disorders. © 2021 American Physiological Society. Compr Physiol 11:1831-1869, 2021.
Collapse
Affiliation(s)
- Matteo Ottolini
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia, USA
| | - Swapnil K Sonkusare
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia, USA.,Department of Molecular Physiology & Biological Physics, University of Virginia, Charlottesville, Virginia, USA.,Robert M. Berne Cardiovascular Research Center, University of Virginia, Charlottesville, Virginia, USA
| |
Collapse
|
48
|
Tan YA, Zhao XD, Sun HJ, Zhao J, Xiao LB, Hao DJ, Jiang YP. Phospholipase C gamma (PLCγ) regulates soluble trehalase in the 20E-induced fecundity of Apolygus lucorum. INSECT SCIENCE 2021; 28:430-444. [PMID: 32108427 DOI: 10.1111/1744-7917.12772] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/03/2020] [Accepted: 02/09/2020] [Indexed: 06/10/2023]
Abstract
Apolygus lucorum is the dominant pathogenic insect attacking Bacillus thuringiensis (Bt) cotton in China. Additionally, 20-hydroxyecdysone (20E) has important functions in many biological processes, including insect reproduction. Phospholipase C (PLC), which is an essential enzyme for phosphoinositide metabolism, is involved in 20E signal transduction, but its function in 20E-mediated reproduction in A. lucorum remains unclear. In this study, 20E increased AlPLCγ transcription as well as the abundance and activity of the encoded protein during molting and metamorphosis. The 20E treatment also induced the considerable accumulation of two second messengers, inositol triphosphate and diacylglycerol. The expression levels of genes encoding vitellogenin (AlVg) and soluble trehalase (AlTre-1) were similar to those of AlPLCγ, and were upregulated in response to 20E. The silencing of AlPLCγ resulted in downregulated expression of AlTre-1 and AlVg. However, the silencing of AlTre-1 and AlVg did not affect AlPLCγ expression. Moreover, the silencing of AlVg did not alter AlTre-1 expression. Furthermore, an examination of the insect specimens indicated that AlPLCγ is required for female adult reproduction, and that downregulated expression of this gene is associated with decreases in fecundity, adult longevity, and egg hatching rate as well as delayed oocyte maturation. We propose that 20E regulates AlTre-1 expression via AlPLCγ and affects Vg expression as well as ovary development to facilitate the reproductive activities of A. lucorum females.
Collapse
Affiliation(s)
- Yong-An Tan
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Xu-Dong Zhao
- College of Forestry, Nanjing Forestry University, Nanjing, China
| | - Hou-Jun Sun
- Jiangsu Xuzhou Sweet Potato Research Center, Xuzhou, Jiangsu Province, China
| | - Jing Zhao
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Liu-Bin Xiao
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - De-Jun Hao
- College of Forestry, Nanjing Forestry University, Nanjing, China
| | - Yi-Pin Jiang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| |
Collapse
|
49
|
Dong W, Lu J, Zhang X, Wu Y, Lettieri K, Hammond GR, Hong Y. A polybasic domain in aPKC mediates Par6-dependent control of membrane targeting and kinase activity. J Cell Biol 2021; 219:151883. [PMID: 32580209 PMCID: PMC7337507 DOI: 10.1083/jcb.201903031] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 03/04/2020] [Accepted: 04/19/2020] [Indexed: 12/14/2022] Open
Abstract
Mechanisms coupling the atypical PKC (aPKC) kinase activity to its subcellular localization are essential for cell polarization. Unlike other members of the PKC family, aPKC has no well-defined plasma membrane (PM) or calcium binding domains, leading to the assumption that its subcellular localization relies exclusively on protein–protein interactions. Here we show that in both Drosophila and mammalian cells, the pseudosubstrate region (PSr) of aPKC acts as a polybasic domain capable of targeting aPKC to the PM via electrostatic binding to PM PI4P and PI(4,5)P2. However, physical interaction between aPKC and Par-6 is required for the PM-targeting of aPKC, likely by allosterically exposing the PSr to bind PM. Binding of Par-6 also inhibits aPKC kinase activity, and such inhibition can be relieved through Par-6 interaction with apical polarity protein Crumbs. Our data suggest a potential mechanism in which allosteric regulation of polybasic PSr by Par-6 couples the control of both aPKC subcellular localization and spatial activation of its kinase activity.
Collapse
Affiliation(s)
- Wei Dong
- Department of Cell Biology, University of Pittsburgh Medical School, Pittsburgh, PA
| | - Juan Lu
- Department of Cell Biology, University of Pittsburgh Medical School, Pittsburgh, PA
| | - Xuejing Zhang
- Department of Cell Biology, University of Pittsburgh Medical School, Pittsburgh, PA
| | - Yan Wu
- Jiangsu University, Zhengjiang, Jiangsu, People's Republic of China
| | - Kaela Lettieri
- First Experience in Research Program, University of Pittsburgh, Pittsburgh, PA
| | - Gerald R Hammond
- Department of Cell Biology, University of Pittsburgh Medical School, Pittsburgh, PA
| | - Yang Hong
- Department of Cell Biology, University of Pittsburgh Medical School, Pittsburgh, PA
| |
Collapse
|
50
|
Zhang J, Zhang L, Xie B, Duan Y, Wang Y, Shen L. PKCα is a Potentially Useful Marker for Planning Individualized Radiotherapy for Nasopharyngeal Carcinoma. Cancer Manag Res 2021; 13:2557-2566. [PMID: 33762847 PMCID: PMC7982553 DOI: 10.2147/cmar.s289421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 03/03/2021] [Indexed: 01/08/2023] Open
Abstract
Purpose To examine the expression of protein kinase C alpha (PKCα) in nasopharyngeal carcinoma (NPC) and determine its relationship to the radio-sensitivity of NPC in order to evaluate its potential as a molecular marker for the guidance of individualized radiation therapy for NPC. Materials and Methods PKCα expression levels were detected in tumor samples from patients and in NPC cell lines with varying degrees of radio-sensitivity. A survival analysis was performed to analyze the association of PKCα expression with the 5-year overall survival (OS), progression-free survival (PFS), locoregional recurrence-free survival (LRFS), and distant metastasis-free survival (DMFS) in patients. In vitro and in vivo experiments using NPC cell lines were performed to study the effects of down-regulation of PKCα by short hairpin RNA treatment on the radio-sensitivity of NPC. Results PKCα expression was up-regulated in the well-differentiated NPC tissues of patients and in the more radio-resistant NPC cell lines. Moreover, high PKCα expression was associated with a worse 5-year PFS and LRFS of patients. shRNA-mediated knockdown of PKCα led to an increase in the sensitivity of NPC cells to radiation therapy, both in vitro as cultured cells and in vivo as tumor xenografts. Conclusion The elevated expression of PKCα in NPC and its association with patient PFS indicates that PKCα is a potential molecular marker for guiding precision radiotherapy in NPC patients. Also, the increased radiosensitivity of NPC cells after loss of PKCα identifies PKCα as a promising therapeutic target for enhancing the radio-sensitivity of NPC.
Collapse
Affiliation(s)
- Jing Zhang
- Department of Oncology, Xiangya Hospital, Central South University (CSU), Changsha, 410008, People's Republic of China
| | - Lu Zhang
- Key Laboratory of Molecular Radiation Oncology, Changsha, Hunan Province, 410008, People's Republic of China
| | - Bowen Xie
- Key Laboratory of Molecular Radiation Oncology, Changsha, Hunan Province, 410008, People's Republic of China
| | - Yumei Duan
- Department of Pathology, Xiangya Hospital, CSU, Changsha, 410008, People's Republic of China
| | - Ying Wang
- Department of Radiology, Xiangya Hospital, CSU, Changsha, 410008, People's Republic of China
| | - Liangfang Shen
- Department of Oncology, Xiangya Hospital, Central South University (CSU), Changsha, 410008, People's Republic of China
| |
Collapse
|