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Chaiwijit P, Uppakara K, Asavapanumas N, Saengsawang W. The Effects of PP2A Disruption on ER-Mitochondria Contact and Mitochondrial Functions in Neuronal-like Cells. Biomedicines 2023; 11:biomedicines11041011. [PMID: 37189629 DOI: 10.3390/biomedicines11041011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
Mitochondria-associated membranes (MAMs) regulate several cellular processes, including calcium homeostasis and mitochondrial function, and dynamics. While MAMs are upregulated in Alzheimer’s disease (AD), the mechanisms underlying this increase remain unknown. A possible mechanism may include dysregulation of protein phosphatase 2A (PP2A), which is reduced in the AD brain. Furthermore, PP2A has been previously reported to modulate MAM formation in hepatocytes. However, it is unknown whether PP2A and MAMs are linked in neuronal cells. Here, to test the correlation between PP2A and MAMs, we inhibited the activity of PP2A to mimic its low levels in AD brains and observed MAM formation, function, and dynamics. MAMs were significantly increased after PP2A inhibition, which correlated with elevated mitochondrial Ca2+ influx and disrupted mitochondrial membrane potential and mitochondrial fission. This study highlights the essential role PP2A plays in regulating MAM formation and mitochondrial function and dynamics for the first time in neuronal-like cells.
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Chukaew P, Bunmak N, Auampradit N, Siripaiboonkij A, Saengsawang W, Ratta‐apha W. Correlation of
BDNF
,
VEGF
,
TNF
‐α, and
S100B
with cognitive impairments in chronic, medicated schizophrenia patients. Neuropsychopharmacol Rep 2022; 42:281-287. [PMID: 35733332 PMCID: PMC9515706 DOI: 10.1002/npr2.12261] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 04/17/2022] [Accepted: 04/28/2022] [Indexed: 12/02/2022] Open
Abstract
Cognitive impairment is a prominent cause of disability in schizophrenia. Although antipsychotic drugs can rescue the psychotic symptoms, the cognitive impairments persist, with no treatment available. Alterations of BDNF, VEGF, TNF‐α, and S100B have been linked to cognitive impairment in several neurological disorders. However, it remains unclear whether their levels are correlated with the cognitive functions of schizophrenia patients. Forty‐one chronic, medicated schizophrenia patients were included in this study. Enzyme‐linked, immunosorbent assays were used to measure the serum concentrations of BDNF, VEGF, TNF‐α, and S100B. Associations between serum protein levels and various domains of the cognitive functions of the schizophrenia patients were observed. We found significant, positive correlations between serum BDNF and the processing speed and attention levels of the patients. Serum VEGF was also positively correlated with their memory and learning functions. In contrast, serum S100B and TNF‐α were negatively correlated with the processing speed and attention of the schizophrenia patients. The findings warrant further investigation of these molecules as potential prognostic markers or treatment targets for cognitive impairment in schizophrenia patients. Associations between serum protein levels and domains of the cognitive functions of the schizophrenia patients were investigated. The results show 1) positive correlations between serum BDNF and the processing speed and attention levels, 2) positive correlations between serum VEGF and the memory and learning functions, and 3) negative correlation between serum S100B and TNF‐α and the processing speed and attention.![]()
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Affiliation(s)
- Phatcharee Chukaew
- Department of Physiology, Faculty of Science Mahidol University Bangkok Thailand
| | - Nutthaya Bunmak
- Department of Physiology, Faculty of Science Mahidol University Bangkok Thailand
| | - Natchaphon Auampradit
- Department of Psychiatry Faculty of Medicine Siriraj Hospital, Mahidol University Bangkok Thailand
| | - Apinya Siripaiboonkij
- Department of Psychiatry Faculty of Medicine Siriraj Hospital, Mahidol University Bangkok Thailand
| | - Witchuda Saengsawang
- Department of Physiology, Faculty of Science Mahidol University Bangkok Thailand
- Center for Neuroscience, Faculty of Science Mahidol University Bangkok Thailand
| | - Woraphat Ratta‐apha
- Department of Psychiatry Faculty of Medicine Siriraj Hospital, Mahidol University Bangkok Thailand
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Sunrat C, Kwanthongdee J, Uppakara K, Chabang N, Munyoo B, Tuchinda P, Saengsawang W. Phyllanthus taxodiifolius Beille Disrupted N-cadherin, Vimentin, Paxillin and Actin Stress Fibers in Glioblastoma. Asian Pac J Cancer Prev 2022; 23:2379-2386. [PMID: 35901345 DOI: 10.31557/apjcp.2022.23.7.2379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Glioblastoma is the most aggressive and lethal brain tumor in adults with highly invasive properties. In this present study, we explored the effects of Phyllanthus taxodiifolius Beille extract on molecules known to be hallmarks of aggressive glioblastoma including N-cadherin and vimentin, mesenchymal markers, as well as paxillin, a major adaptor protein that regulates the linking of focal adhesions to the actin cytoskeleton. METHODS P. taxodiifolius were air-dried, powdered and percolated with methanol, filtered, concentrated and lyophilized to yield a crude methanol extract. C6 glioblastoma cell line was used in this study. The expression of N-cadherin and vimentin, as well as the activation of paxillin was determined using Western blot analysis. The effect of the extract on focal adhesions and actin cytoskeleton were investigated using immunofluorescence staining and confocal imaging. RESULTS In the presence of 40 µg/ml Phyllanthus taxodiifolius Beille extract, the expression of N-cadherin and vimentin were significantly decreased (p<0.001 and p<0.05, respectively). Activation of paxillin was also diminished as indicated by a reduction of phosphorylated-paxillin (p<0.01). Consequently, actin stress fibers in glioblastoma cells were abolished as evidenced by the decrease in focal adhesion (p<0.001) and stress fibers numbers (p<0.001). CONCLUSION Our study demonstrates for the first time that P. taxodiifolius interferes with multiple key molecules related to pathological hallmarks of glioblastoma. These molecules are involved with cell contacts, focal adhesions, and the formation and stabilization of actin stress fibers, which are required for glioblastoma metastatic behavior. These results provide further evidence supporting the potential of P. taxodiifolius and its bioactive compounds as anti-cancer agents.
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Affiliation(s)
- Chotchanit Sunrat
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Jaturon Kwanthongdee
- Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, Thailand
| | - Kwanchanok Uppakara
- Chakri Naruebodindra Medical Institute, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangpla, Bangpli, Samutprakarn, Thailand
| | - Napason Chabang
- School of Bioinnovation and Bio-based Product Intelligence, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Bamroong Munyoo
- Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Patoomratana Tuchinda
- Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Bangkok, Thailand.,6Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Witchuda Saengsawang
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Bangkok, Thailand.,Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok, Thailand
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4
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Wongkaewkhiaw S, Wongrakpanich A, Krobthong S, Saengsawang W, Chairoungdua A, Boonmuen N. Induction of apoptosis in human colorectal cancer cells by nanovesicles from fingerroot (Boesenbergia rotunda (L.) Mansf.). PLoS One 2022; 17:e0266044. [PMID: 35377896 PMCID: PMC8979466 DOI: 10.1371/journal.pone.0266044] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 03/12/2022] [Indexed: 12/12/2022] Open
Abstract
Colorectal cancer is the leading cause of cancer-related deaths worldwide, warranting the urgent need for a new treatment option. Plant-derived nanovesicles containing bioactive compounds represent new therapeutic avenues due to their unique characteristics as natural nanocarriers for bioactive molecules with therapeutic effects. Recent evidence has revealed potential anticancer activity of bioactive compounds from Boesenbergia rotunda (L.) Mansf. (fingerroot). However, the effect and the underlying mechanisms of fingerroot-derived nanovesicles (FDNVs) against colorectal cancer are still unknown. We isolated the nanovesicles from fingerroot and demonstrated their anticancer activity against two colorectal cancer cell lines, HT-29 and HCT116. The IC50 values were 63.9 ± 2.4, 57.8 ± 4.1, 47.8 ± 7.6 μg/ml for HT-29 cells and 57.7 ± 6.6, 47.2 ± 5.2, 34 ± 2.9 μg/ml for HCT116 cells at 24, 48, and 72 h, respectively. Interestingly, FDNVs were not toxic to a normal colon epithelial cell line, CCD 841 CoN. FDNVs exhibited selective uptake by the colorectal cancer cell lines but not the normal colon epithelial cell line. Moreover, dose- and time-dependent FDNV-induced apoptosis was only observed in the colorectal cancer cell lines. In addition, reactive oxygen species levels were substantially increased in colorectal cancer cells, but total glutathione decreased after treatment with FDNVs. Our results show that FDNVs exhibited selective anticancer activity in colorectal cancer cell lines via the disruption of intracellular redox homeostasis and induction of apoptosis, suggesting the utility of FDNVs as a novel intervention for colorectal cancer patients.
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Affiliation(s)
| | | | - Sucheewin Krobthong
- Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Witchuda Saengsawang
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok, Thailand
- Excellent Center for Drug Discovery (ECDD), Mahidol University, Bangkok, Thailand
| | - Arthit Chairoungdua
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Excellent Center for Drug Discovery (ECDD), Mahidol University, Bangkok, Thailand
- Toxicology Graduate Program, Faculty of Science, Mahidol University, Bangkok, Thailand
- Center of Excellence on Environmental Health and Toxicology, OPS, MHESI, Bangkok, Thailand
| | - Nittaya Boonmuen
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
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5
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Fouquet G, Thongsa-Ad U, Lefevre C, Rousseau A, Tanhuad N, Khongkla E, Saengsawang W, Anurathapan U, Hongeng S, Maciel TT, Hermine O, Bhukhai K. Iron-loaded transferrin potentiates erythropoietin effects on erythroblast proliferation and survival: a novel role through transferrin receptors. Exp Hematol 2021; 99:12-20.e3. [PMID: 34077792 DOI: 10.1016/j.exphem.2021.05.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 05/16/2021] [Accepted: 05/26/2021] [Indexed: 12/21/2022]
Abstract
Red blood cell production, or erythropoiesis, is a proliferative process that requires tight regulation. Erythropoietin (Epo) is a glycoprotein cytokine that plays a major role in erythropoiesis by triggering erythroid progenitors/precursors of varying sensitivity. The concentration of Epo in bone marrow is hypothesized to be suboptimal, and the survival of erythroid cells has been suggested to depend on Epo sensitivity. However, the key factors that control Epo sensitivity remain unknown. Two types of transferrin receptors (TfRs), TfR1 and TfR2, are known to play a role in iron uptake in erythroid cells. Here, we hypothesized that TfRs may additionally modulate Epo sensitivity during erythropoiesis by modulating Epo receptor (EpoR) signaling. Using an Epo-sensitive UT-7 (UT7/Epo) erythroid cell and human erythroid progenitor cell models, we report that iron-loaded transferrin, that is, holo-transferrin (holo-Tf), synergizes with suboptimal Epo levels to improve erythroid cell survival, proliferation, and differentiation. This is accomplished via the major signaling pathways of erythropoiesis, which include signal transducer and activator of transcription 5 (STAT5), mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK), and phosphoinositide-3-kinase (PI3K)/AKT. Furthermore, we found that this cooperation is improved by, but does not require, the internalization of TfR1. Interestingly, we observed that loss of TfR2 stabilizes EpoR levels and abolishes the beneficial effects of holo-Tf. Overall, these data reveal novel signaling properties of TfRs, which involve the regulation of erythropoiesis through EpoR signaling.
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Affiliation(s)
- Guillemette Fouquet
- Institut Hospitalo-Universitaire (IHU) Imagine, Université Sorbonne Paris cité, Assistance Publique-Hôpitaux de Paris, Hôpital Necker, Paris, France; INSERM U1163, Université Paris Descartes, Faculté de Médecine, Hôpital Necker, Paris, France; Laboratory of Excellence GReX, Paris, France
| | | | - Carine Lefevre
- Laboratory of Excellence GReX, Paris, France; INSERM U1016, Institut Cochin, Centre National de la Recherche Scientifique (CNRS) UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Alice Rousseau
- INSERM U1016, Institut Cochin, Centre National de la Recherche Scientifique (CNRS) UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Nopmullee Tanhuad
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Ekkaphot Khongkla
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Witchuda Saengsawang
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Usanarat Anurathapan
- Department of Pediatrics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Suradej Hongeng
- Department of Pediatrics, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Thiago T Maciel
- Institut Hospitalo-Universitaire (IHU) Imagine, Université Sorbonne Paris cité, Assistance Publique-Hôpitaux de Paris, Hôpital Necker, Paris, France; INSERM U1163, Université Paris Descartes, Faculté de Médecine, Hôpital Necker, Paris, France; Laboratory of Excellence GReX, Paris, France
| | - Olivier Hermine
- Institut Hospitalo-Universitaire (IHU) Imagine, Université Sorbonne Paris cité, Assistance Publique-Hôpitaux de Paris, Hôpital Necker, Paris, France; INSERM U1163, Université Paris Descartes, Faculté de Médecine, Hôpital Necker, Paris, France; Laboratory of Excellence GReX, Paris, France; Service d'Hématologie clinique adultes, Assistance Publique-Hôpitaux de Paris, Hôpital Necker, Paris, France
| | - Kanit Bhukhai
- Institut Hospitalo-Universitaire (IHU) Imagine, Université Sorbonne Paris cité, Assistance Publique-Hôpitaux de Paris, Hôpital Necker, Paris, France; INSERM U1163, Université Paris Descartes, Faculté de Médecine, Hôpital Necker, Paris, France; Laboratory of Excellence GReX, Paris, France; Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand.
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6
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Uppakara K, Jamornwan S, Duan LX, Yue KR, Sunrat C, Dent EW, Wan SB, Saengsawang W. Novel α-Lipoic Acid/3- n-Butylphthalide Conjugate Enhances Protective Effects against Oxidative Stress and 6-OHDA Induced Neuronal Damage. ACS Chem Neurosci 2020; 11:1634-1642. [PMID: 32374999 DOI: 10.1021/acschemneuro.0c00105] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Neurodegenerative diseases are irreversible conditions that result in progressive degeneration and death of nerve cells. Although the underlying mechanisms may vary, oxidative stress is considered to be one of the major causes of neuronal loss. Importantly, there are still no comprehensive treatments to completely cure these diseases. Therefore, protecting neurons from oxidative damage may be the most effective therapeutic strategy. Here we report a neuroprotective effects of a novel hybrid compound (dlx-23), obtained by conjugating α-lipoic acid (ALA), a natural antioxidant agent, and 3-n-butylphthalide (NBP), a clinical anti-ischemic drug. Dlx-23 protected against neuronal death induced by both H2O2 induced oxidative stress in Cath.-a-differentiated (CAD) cells and 6-OHDA, a toxin model of Parkinson's disease (PD) in SH-SY5Y cells. These activities proved to be more potent than the parent compound (ALA) alone. Dlx-23 scavenged free radicals, increased glutathione levels, and prevented mitochondria damage. In addition, live imaging of primary cortical neurons demonstrated that dlx-23 protected against neuronal growth cone damage induced by H2O2. Taken together these results suggest that dlx-23 has substantial potential to be further developed into a novel neuroprotective agent against oxidative damage and toxin induced neurodegeneration.
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Affiliation(s)
- Kwanchanok Uppakara
- Toxicology Graduate Program; Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Sopana Jamornwan
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Liang-xing Duan
- Qingdao National Laboratory for Marine Science and Technology; School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
| | - Kai-rui Yue
- Qingdao National Laboratory for Marine Science and Technology; School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
| | - Chotchanit Sunrat
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Erik W Dent
- Department of Neuroscience, University of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Sheng-biao Wan
- Qingdao National Laboratory for Marine Science and Technology; School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
| | - Witchuda Saengsawang
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
- Center for Neuroscience, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
- Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Bangkok 10400, Thailand
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7
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Kwanthongdee J, Sunrat C, Munyoo B, Tuchinda P, Chabang N, Saengsawang W. Phyllanthus taxodiifolius Beille suppresses microtubule dynamics and restricts glioblastoma aggressiveness. Biomed Pharmacother 2019; 112:108645. [PMID: 30798125 DOI: 10.1016/j.biopha.2019.108645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/24/2019] [Accepted: 01/29/2019] [Indexed: 11/17/2022] Open
Abstract
Glioblastoma is the most common and the most malignant form of brain tumor. This devastating tumor results in death within a year after diagnosis. Although the tumor mass can be surgically removed, glioma cells invade other areas in the brain leading to tumor recurrence and poor prognosis. Therefore, new agents that can overcome cancer cell invasion are urgently required. Phyllanthus taxodiifolius Beille (P. taxodiifolius), has been reported to have potent anti-cancer activities. However, its effects on glioblastoma cells and its underlying mechanisms have never been revealed. Here we investigated the effect and underlying mechanisms of P. taxodiifolius extract on aggressive properties of the glioblastoma, including adhesion, migration, and invasion. P. taxodiifolius extract disrupted adhesion, delayed migration and interfered with the invasion of glioblastoma cells. In addition, the extract suppressed microtubule dynamics as shown by live imaging of a microtubule plus tip protein and decreased focal adhesion by decreasing focal adhesion kinase activity. Our study is the first evidence showing that P. taxodiifolius extract suppresses invasive properties of glioblastoma cells by disrupting microtubule structure and interfering with microtubule dynamics, suggesting the possibility to further develop P. taxodiifolius and its bioactive compounds as an anti-cancer drug targeting microtubules in glioblastoma.
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Affiliation(s)
- Jaturon Kwanthongdee
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand
| | - Chotchanit Sunrat
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand
| | - Bamroong Munyoo
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand; Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand
| | - Patoomratana Tuchinda
- Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand; Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand
| | - Napason Chabang
- School of Bioinnovation and Bio-Based Product Intelligence, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand
| | - Witchuda Saengsawang
- Department of Physiology, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand; Excellent Center for Drug Discovery (ECDD), Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand; Center for Neuroscience, Faculty of Science, Mahidol University, Rama VI Rd, Bangkok, Thailand.
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8
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Reabroi S, Chairoungdua A, Saeeng R, Kasemsuk T, Saengsawang W, Zhu W, Piyachaturawat P. A silyl andrographolide analogue suppresses Wnt/β-catenin signaling pathway in colon cancer. Biomed Pharmacother 2018; 101:414-421. [DOI: 10.1016/j.biopha.2018.02.119] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/16/2018] [Accepted: 02/23/2018] [Indexed: 11/16/2022] Open
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9
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Luo DD, Peng K, Yang JY, Piyachaturawat P, Saengsawang W, Ao L, Zhao WZ, Tang Y, Wan SB. Structural modification of oridonin via DAST induced rearrangement. RSC Adv 2018; 8:29548-29554. [PMID: 35547324 PMCID: PMC9085272 DOI: 10.1039/c8ra05728a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 08/10/2018] [Indexed: 01/05/2023] Open
Abstract
A novel and concise synthetic approach for the preparation of 6,20-epoxy ent-kaurane diterpenoid from oridonin was established.
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Affiliation(s)
- Dong-Dong Luo
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | - Kai Peng
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | - Jia-Yu Yang
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | | | - Witchuda Saengsawang
- Department of Physiology
- Faculty of Science
- Mahidol University
- Bangkok 10400
- Thailand
| | - Lei Ao
- The Nanjing Han & Zaenker Cancer Institute (NHZCI)
- Nanjing OGpharma Co. Ltd
- Nanjing 210036
- China
| | - Wan-Zhou Zhao
- The Nanjing Han & Zaenker Cancer Institute (NHZCI)
- Nanjing OGpharma Co. Ltd
- Nanjing 210036
- China
| | - Yu Tang
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
| | - Sheng-Biao Wan
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology
- Key Laboratory of Marine Drugs
- Ministry of Education
- School of Medicine and Pharmacy
- Ocean University of China
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10
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Monger A, Boonmuen N, Suksen K, Saeeng R, Kasemsuk T, Piyachaturawat P, Saengsawang W, Chairoungdua A. Inhibition of Topoisomerase IIα and Induction of Apoptosis in Gastric Cancer Cells by 19-Triisopropyl Andrographolide. Asian Pac J Cancer Prev 2017; 18:2845-2851. [PMID: 29072435 PMCID: PMC5747413 DOI: 10.22034/apjcp.2017.18.10.2845] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Gastric cancer is the most common cancer in Eastern Asia. Increasing chemoresistance and general systemic
toxicities have complicated the current chemotherapy leading to an urgent need of more effective agents. The present
study reported a potent DNA topoisomerase IIα inhibitory activity of an andrographolide analogue (19-triisopropyl
andrographolide, analogue-6) in gastric cancer cells; MKN-45, and AGS cells. The analogue was potently cytotoxic to
both gastric cancer cell lines with the half maximal inhibitory concentration (IC50 values) of 6.3±0.7 μM, and 1.7±0.05
μM at 48 h for MKN-45, and AGS cells, respectively. It was more potent than the parent andrographolide and the
clinically used, etoposide with the IC50 values of >50 μM in MKN-45 and 11.3±2.9 μM in AGS cells for andrographolide
and 28.5±4.4 μM in MKN-45 and 4.08±0.5 μM in AGS cells for etoposide. Analogue-6 at 2 μM significantly inhibited
DNA topoisomerase IIα enzyme in AGS cells, induced DNA damage, activated cleaved PARP-1, and Caspase3 leading
to late cellular apoptosis. Interestingly, the expression of tumor suppressor p53 was not activated. These results show
the importance of 19-triisopropyl-andrographolide in its emerging selectivity to primary target on topoisomerase IIα
enzyme, inducing DNA damage and apoptosis by p53- independent mechanism. Thereby, the results provide insights of
the potential of 19-triisopropyl andrographolide as an anticancer agent for gastric cancer. The chemical transformation
of andrographolide is a promising strategy in drug discovery of a novel class of anticancer drugs from bioactive natural
products.
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Affiliation(s)
- Adeep Monger
- Toxicology Graduate Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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Saengsawang W, Taylor KL, Lumbard DC, Mitok K, Price A, Pietila L, Gomez TM, Dent EW. CIP4 coordinates with phospholipids and actin-associated proteins to localize to the protruding edge and produce actin ribs and veils. J Cell Sci 2013; 126:2411-23. [PMID: 23572514 DOI: 10.1242/jcs.117473] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Cdc42-interacting protein 4 (CIP4), a member of the F-BAR family of proteins, plays important roles in a variety of cellular events by regulating both membrane and actin dynamics. In many cell types, CIP4 functions in vesicle formation, endocytosis and membrane tubulation. However, recent data indicate that CIP4 is also involved in protrusion in some cell types, including cancer cells (lamellipodia and invadopodia) and neurons (ribbed lamellipodia and veils). In neurons, CIP4 localizes specifically to extending protrusions and functions to limit neurite outgrowth early in development. The mechanism by which CIP4 localizes to the protruding edge membrane and induces lamellipodial/veil protrusion and actin rib formation is not known. Here, we show that CIP4 localization to the protruding edge of neurons is dependent on both the phospholipid content of the plasma membrane and the underlying organization of actin filaments. Inhibiting phosphatidylinositol (3,4,5)-trisphosphate (PIP3) production decreases CIP4 at the membrane. CIP4 localization to the protruding edge is also dependent on Rac1/WAVE1, rather than Cdc42/N-WASP. Capping actin filaments with low concentrations of cytochalasin D or by overexpressing capping protein dramatically decreases CIP4 at the protruding edge, whereas inactivating Arp2/3 drives CIP4 to the protruding edge. We also demonstrate that CIP4 dynamically colocalizes with Ena/VASP and DAAM1, two proteins known to induce unbranched actin filament arrays and play important roles in neuronal development. Together, this is the first study to show that the localization of an F-BAR protein depends on both actin filament architecture and phospholipids at the protruding edge of developing neurons.
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Affiliation(s)
- Witchuda Saengsawang
- University of Wisconsin-Madison, Department of Neuroscience, Madison, WI 53706, USA
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Davé RH, Saengsawang W, Lopus M, Davé S, Wilson L, Rasenick MM. A molecular and structural mechanism for G protein-mediated microtubule destabilization. J Biol Chem 2010; 286:4319-28. [PMID: 21112971 DOI: 10.1074/jbc.m110.196436] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The heterotrimeric, G protein-coupled receptor-associated G protein, Gα(s), binds tubulin with nanomolar affinity and disrupts microtubules in cells and in vitro. Here we determine that the activated form of Gα(s) binds tubulin with a K(D) of 100 nm, stimulates tubulin GTPase, and promotes microtubule dynamic instability. Moreover, the data reveal that the α3-β5 region of Gα(s) is a functionally important motif in the Gα(s)-mediated microtubule destabilization. Indeed, peptides corresponding to that region of Gα(s) mimic Gα(s) protein in activating tubulin GTPase and increase microtubule dynamic instability. We have identified specific mutations in peptides or proteins that interfere with this process. The data allow for a model of the Gα(s)/tubulin interface in which Gα(s) binds to the microtubule plus-end and activates the intrinsic tubulin GTPase. This model illuminates both the role of tubulin as an "effector" (e.g. adenylyl cyclase) for Gα(s) and the role of Gα(s) as a GTPase activator for tubulin. Given the ability of Gα(s) to translocate intracellularly in response to agonist activation, Gα(s) may play a role in hormone- or neurotransmitter-induced regulation of cellular morphology.
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Affiliation(s)
- Rahul H Davé
- Department of Physiology and Biophysics, University of Illinois, Chicago, Illinois 60612, USA
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Dave RH, Saengsawang W, Yu JZ, Donati R, Rasenick MM. Heterotrimeric G-proteins interact directly with cytoskeletal components to modify microtubule-dependent cellular processes. Neurosignals 2009; 17:100-8. [PMID: 19212143 DOI: 10.1159/000186693] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2008] [Accepted: 11/05/2008] [Indexed: 01/07/2023] Open
Abstract
A large percentage of current drugs target G-protein-coupled receptors, which couple to well-known signaling pathways involving cAMP or calcium. G-proteins themselves may subserve a second messenger function. Here, we review the role of tubulin and microtubules in directly mediating effects of heterotrimeric G-proteins on neuronal outgrowth, shape and differentiation. G-protein-tubulin interactions appear to be regulated by neurotransmitter activity, and, in turn, regulate the location of Galpha in membrane microdomains (such as lipid rafts) or the cytosol. Tubulin binds with nanomolar affinity to Gsalpha, Gialpha1 and Gqalpha (but not other Galpha subunits) as well as Gbeta(1)gamma(2) subunits. Galpha subunits destabilize microtubules by stimulating tubulin's GTPase, while Gbetagamma subunits promote microtubule stability. The same region on Gsalpha that binds adenylyl cyclase and Gbetagamma also interacts with tubulin, suggesting that cytoskeletal proteins are novel Galpha effectors. Additionally, intracellular Gialpha-GDP, in concert with other GTPase proteins and Gbetagamma, regulates the position of the mitotic spindle in mitosis. Thus, G-protein activation modulates cell growth and differentiation by directly altering microtubule stability. Further studies are needed to fully establish a structural mechanism of this interaction and its role in synaptic plasticity.
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Affiliation(s)
- Rahul H Dave
- Department of Physiology and Biophysics, University of Illinois Chicago, Chicago, Il 60612-7342, USA
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Layden BT, Saengsawang W, Donati RJ, Yang S, Mulhearn DC, Johnson ME, Rasenick MM. Structural model of a complex between the heterotrimeric G protein, Gsalpha, and tubulin. Biochim Biophys Acta 2008; 1783:964-73. [PMID: 18373982 DOI: 10.1016/j.bbamcr.2008.02.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2007] [Revised: 02/11/2008] [Accepted: 02/13/2008] [Indexed: 11/17/2022]
Abstract
A number of studies have demonstrated interplay between the cytoskeleton and G protein signaling. Many of these studies have determined a specific interaction between tubulin, the building block of microtubules, and G proteins. The alpha subunits of some heterotrimeric G proteins, including Gsalpha, have been shown to interact strongly with tubulin. Binding of Galpha to tubulin results in increased dynamicity of microtubules due to activation of GTPase of tubulin. Tubulin also activates Gsalpha via a direct transfer of GTP between these molecules. Structural insight into the interaction between tubulin and Gsalpha was required, and was determined, in this report, through biochemical and molecular docking techniques. Solid phase peptide arrays suggested that a portion of the amino terminus, alpha2-beta4 (the region between switch II and switch III) and alpha3-beta5 (just distal to the switch III region) domains of Gsalpha are important for interaction with tubulin. Molecular docking studies revealed the best-fit models based on the biochemical data, showing an interface between the two molecules that includes the adenylyl cyclase/Gbetagamma interaction regions of Gsalpha and the exchangeable nucleotide-binding site of tubulin. These structural models explain the ability of tubulin to facilitate GTP exchange on Galpha and the ability of Galpha to activate tubulin GTPase.
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Affiliation(s)
- Brian T Layden
- Department of Physiology and Biophysics, University of Illinois at Chicago, Chicago, Illinois 60612, USA
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