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Le HT, Nguyen DPL, Jung GT, Kim E, Yang SH, Lee SM, Lee EA, Jung W, Kim TW, Kim KP. Enrichment and MALDI-TOF MS Analysis of Phosphoinositides in Brain Tissue. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:1069-1075. [PMID: 38603805 DOI: 10.1021/jasms.3c00364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Triazolium cyclodextrin click cluster (+CCC) is an ideal scaffold to specifically bind phosphoinositides (PIPs) via multivalent electrostatic interaction. A new enrichment material, triazolium cyclodextrin click cluster-magnetic agarose bead conjugate (+CCC-MAB), was synthesized and applied to the PIP enrichment of brain tissue. The enriched sample was analyzed using MALDI-TOF MS in negative ion mode without any derivatization. The PIP extract of brain tissue is known to contain abundant lipid interferences. By employing magnetic pull-down separation using +CCC-MAB, we effectively removed the weak-binding interferences in the PIP extract, thereby improving the signal-to-noise ratio (S/N) of the PIPs. Our +CCC-MAB-based PIP enrichment enabled us to analyze 16 PIP species in brain tissue. Six species with high S/N were assigned by MS/MS, while the remaining 10 species with low S/N were characterized by an empirical selection guide based on the biological relevance of PIPs. We conclude that +CCC-MAB-based PIP enrichment is a promising MALDI sample preparation method for specific PIP analysis in brain tissue.
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Affiliation(s)
- Hoa Thi Le
- Department of Applied Chemistry, College of Applied Science, Kyung Hee University, Yongin 17104, Republic of Korea
- Faculty of Chemical Technology, Hanoi University of Industry, 298 Minh Khai, Bac Tu Liem, Ha Noi 143510, Vietnam
| | - Dinh Phi Long Nguyen
- Department of Gerontology (AgeTech-Service Convergence Major), Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Gun Tae Jung
- Department of Biomedical Science and Technology, Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Eunju Kim
- Department of Applied Chemistry, Institute of Natural Science, Global Center for Pharmaceutical Ingredient Materials, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Seon Hee Yang
- Department of Gerontology (AgeTech-Service Convergence Major), Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Sun Min Lee
- Department of Gerontology (AgeTech-Service Convergence Major), Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Eun Ah Lee
- Impedance Imaging Research Center, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Woong Jung
- Department of Emergency Medicine, School of Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Tae Woo Kim
- Department of Gerontology (AgeTech-Service Convergence Major), Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Kwang Pyo Kim
- Department of Applied Chemistry, College of Applied Science, Kyung Hee University, Yongin 17104, Republic of Korea
- Department of Biomedical Science and Technology, Kyung Hee Medical Science Research Institute, Kyung Hee University, Seoul 02447, Republic of Korea
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Blitsman Y, Hollander E, Benafsha C, Yegodayev KM, Hadad U, Goldbart R, Traitel T, Rudich A, Elkabets M, Kost J. The Potential of PIP3 in Enhancing Wound Healing. Int J Mol Sci 2024; 25:1780. [PMID: 38339058 PMCID: PMC10855400 DOI: 10.3390/ijms25031780] [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: 12/14/2023] [Revised: 01/10/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
Given the role of phosphatidylinositol 3,4,5-trisphosphate (PIP3) in modulating cellular processes such as proliferation, survival, and migration, we hypothesized its potential as a novel therapeutic agent for wound closure enhancement. In this study, PIP3 was examined in its free form or as a complex with cationic starch (Q-starch) as a carrier. The intracellular bioactivity and localization of free PIP3 and the Q-starch/PIP3 complexes were examined. Our results present the capability of Q-starch to form complexes with PIP3, facilitate its cellular membrane internalization, and activate intracellular paths leading to enhanced wound healing. Both free PIP3 and Q-starch/PIP3 complexes enhanced monolayer gap closure in scratch assays and induced amplified collagen production within HaCAT and BJ fibroblast cells. Western blot presented enhanced AKT activation by free or complexed PIP3 in BJ fibroblasts in which endogenous PIP3 production was pharmacologically inhibited. Furthermore, both free PIP3 and Q-starch/PIP3 complexes expedited wound closure in mice, after single or daily dermal injections into the wound margins. Free PIP3 and the Q-starch/PIP3 complexes inherently activated the AKT signaling pathway, which is responsible for crucial wound healing processes such as migration; this was also observed in wound assays in mice. PIP3 was identified as a promising molecule for enhancing wound healing, and its ability to circumvent PI3K inhibition suggests possible implications for chronic wound healing.
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Affiliation(s)
- Yossi Blitsman
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (Y.B.); (C.B.); (R.G.); (T.T.)
| | - Etili Hollander
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (Y.B.); (C.B.); (R.G.); (T.T.)
| | - Chen Benafsha
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (Y.B.); (C.B.); (R.G.); (T.T.)
| | - Ksenia M. Yegodayev
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (K.M.Y.); (M.E.)
| | - Uzi Hadad
- The Ilse Katz Institute for Nanoscale Science and Technology, Marcus Campus, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;
| | - Riki Goldbart
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (Y.B.); (C.B.); (R.G.); (T.T.)
| | - Tamar Traitel
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (Y.B.); (C.B.); (R.G.); (T.T.)
| | - Assaf Rudich
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel;
| | - Moshe Elkabets
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (K.M.Y.); (M.E.)
| | - Joseph Kost
- Department of Chemical Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (Y.B.); (C.B.); (R.G.); (T.T.)
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Wijayaratna D, Ratnayake K, Ubeysinghe S, Kankanamge D, Tennakoon M, Karunarathne A. The spatial distribution of GPCR and Gβγ activity across a cell dictates PIP3 dynamics. Sci Rep 2023; 13:2771. [PMID: 36797332 PMCID: PMC9935898 DOI: 10.1038/s41598-023-29639-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 02/08/2023] [Indexed: 02/18/2023] Open
Abstract
Phosphatidylinositol (3,4,5) trisphosphate (PIP3) is a plasma membrane-bound signaling phospholipid involved in many cellular signaling pathways that control crucial cellular processes and behaviors, including cytoskeleton remodeling, metabolism, chemotaxis, and apoptosis. Therefore, defective PIP3 signaling is implicated in various diseases, including cancer, diabetes, obesity, and cardiovascular diseases. Upon activation by G protein-coupled receptors (GPCRs) or receptor tyrosine kinases (RTKs), phosphoinositide-3-kinases (PI3Ks) phosphorylate phosphatidylinositol (4,5) bisphosphate (PIP2), generating PIP3. Though the mechanisms are unclear, PIP3 produced upon GPCR activation attenuates within minutes, indicating a tight temporal regulation. Our data show that subcellular redistributions of G proteins govern this PIP3 attenuation when GPCRs are activated globally, while localized GPCR activation induces sustained subcellular PIP3. Interestingly the observed PIP3 attenuation was Gγ subtype-dependent. Considering distinct cell-tissue-specific Gγ expression profiles, our findings not only demonstrate how the GPCR-induced PIP3 response is regulated depending on the GPCR activity gradient across a cell, but also show how diversely cells respond to spatial and temporal variability of external stimuli.
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Affiliation(s)
- Dhanushan Wijayaratna
- grid.267337.40000 0001 2184 944XDepartment of Chemistry and Biochemistry, The University of Toledo, Toledo, OH 43606 USA ,grid.262962.b0000 0004 1936 9342Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, Saint Louis, MO 63103 USA
| | - Kasun Ratnayake
- grid.267337.40000 0001 2184 944XDepartment of Chemistry and Biochemistry, The University of Toledo, Toledo, OH 43606 USA
| | - Sithurandi Ubeysinghe
- grid.267337.40000 0001 2184 944XDepartment of Chemistry and Biochemistry, The University of Toledo, Toledo, OH 43606 USA ,grid.262962.b0000 0004 1936 9342Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, Saint Louis, MO 63103 USA
| | - Dinesh Kankanamge
- grid.267337.40000 0001 2184 944XDepartment of Chemistry and Biochemistry, The University of Toledo, Toledo, OH 43606 USA ,grid.4367.60000 0001 2355 7002Department of Anesthesiology, Washington University School of Medicine, Saint Louis, MO 63110 USA
| | - Mithila Tennakoon
- grid.267337.40000 0001 2184 944XDepartment of Chemistry and Biochemistry, The University of Toledo, Toledo, OH 43606 USA ,grid.262962.b0000 0004 1936 9342Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, Saint Louis, MO 63103 USA
| | - Ajith Karunarathne
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, OH, 43606, USA. .,Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, Saint Louis, MO, 63103, USA.
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Shah K, Sanghavi N, Viswanathan A, Kumar A, Kumar N, Kaushik P, Kumari BSA, Appaji L. Optic pathway tumor in an infant with KIAA1109 variants. Pediatr Blood Cancer 2022; 69:e29701. [PMID: 35377517 DOI: 10.1002/pbc.29701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 03/16/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Krunal Shah
- Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Niyati Sanghavi
- Medical Oncology, HealthCare Global Hospital Bangalore, Bangalore, Karnataka, India
| | - Aarthi Viswanathan
- Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Arun Kumar
- Department of Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Nuthan Kumar
- Department of Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - Prakruthi Kaushik
- Department of Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - B S Aruna Kumari
- Department of Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
| | - L Appaji
- Department of Pediatric Oncology, Kidwai Memorial Institute of Oncology, Bangalore, Karnataka, India
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Phosphoinositide 3-Kinases as Potential Targets for Thrombosis Prevention. Int J Mol Sci 2022; 23:ijms23094840. [PMID: 35563228 PMCID: PMC9105564 DOI: 10.3390/ijms23094840] [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: 03/29/2022] [Revised: 04/23/2022] [Accepted: 04/25/2022] [Indexed: 02/01/2023] Open
Abstract
As integral parts of pathological arterial thrombi, platelets are the targets of pharmacological regimens designed to treat and prevent thrombosis. A detailed understanding of platelet biology and function is thus key to design treatments that prevent thrombotic cardiovascular disease without significant disruption of the haemostatic balance. Phosphoinositide 3-kinases (PI3Ks) are a group of lipid kinases critical to various aspects of platelet biology. There are eight PI3K isoforms, grouped into three classes. Our understanding of PI3K biology has recently progressed with the targeting of specific isoforms emerging as an attractive therapeutic strategy in various human diseases, including for thrombosis. This review will focus on the role of PI3K subtypes in platelet function and subsequent thrombus formation. Understanding the mechanisms by which platelet function is regulated by the various PI3Ks edges us closer toward targeting specific PI3K isoforms for anti-thrombotic therapy.
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Wen S, Hu M, Xiong Y. Effect of Eriodictyol on Retinoblastoma via the PI3K/Akt Pathway. JOURNAL OF HEALTHCARE ENGINEERING 2021; 2021:6091585. [PMID: 34804455 PMCID: PMC8601792 DOI: 10.1155/2021/6091585] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 10/22/2021] [Indexed: 12/16/2022]
Abstract
Retinoblastoma (RB) is one of the most common intraocular malignancies in children, which causes vision loss and even threatens life. Eriodictyol is a natural flavonoid with strong anticancer activity. Some studies have shown that eriodictyol exerts anticancer effects in glioma, colon cancer, and lung cancer; however, no studies have reported the anticancer effects of eriodictyol on RB. Therefore, the aim of this study was to investigate the anticancer activity of eriodictyol against the RB Y79 cell line and its potential mechanism of action. Interestingly, we found that eriodictyol inhibited the proliferation, migration, and invasion of Y79 cells in a dose-dependent manner and decreased the expression of MMP-2 and MMP-9 proteins in the cells. In addition, eriodictyol-induced apoptosis in Y79 cells was assessed by flow cytometry and immunoblotting. Here, our study revealed that eriodictyol dose dependently inhibited the activation of the PI3K/Akt signaling pathway. Notably, the effect of eriodictyol on RB apoptosis was reversed by a PI3K agonist 740 Y-P. In conclusion, our study shows that eriodictyol effectively inhibits proliferation, migration, and invasion and induces apoptosis in RB cell lines, which may be the result of blocking the PI3K/Akt signaling pathway. Thus, eriodictyol may provide a new theoretical basis for exploring targeted antitumor natural therapies.
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Affiliation(s)
- Shu Wen
- Department of Ophthalmology, Jingmen No. 1 People's Hospital, Xiangshan Road, Jingmen, Hubei, China
| | - Meng Hu
- Department of Ophthalmology, Jingmen No. 1 People's Hospital, Xiangshan Road, Jingmen, Hubei, China
| | - Yan Xiong
- Department of Ophthalmology, Jingmen No. 1 People's Hospital, Xiangshan Road, Jingmen, Hubei, China
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Current Perspective on the Natural Compounds and Drug Delivery Techniques in Glioblastoma Multiforme. Cancers (Basel) 2021; 13:cancers13112765. [PMID: 34199460 PMCID: PMC8199612 DOI: 10.3390/cancers13112765] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/30/2021] [Accepted: 05/31/2021] [Indexed: 12/20/2022] Open
Abstract
Simple Summary Glioblastoma multiforme (GBM) is one of the belligerent neoplasia that metastasize to other brain regions and invade nearby healthy tissues. However, the treatments available are associated with some limitations, such as high variations in solid tumors and deregulation of multiple cellular pathways. The heterogeneity of the GBM tumor and its aggressive infiltration into the nearby tissues makes it difficult to treat. Hence, the development of multimodality therapy that can be more effective, novel, with fewer side effects, improving the prognosis for GBM is highly desired. This review evaluated the use of natural phytoconstituents as an alternative for the development of a new therapeutic strategy. The key aspects of GBM and the potential of drug delivery techniques were also assessed, for tumor site delivery with limited side-effects. These efforts will help to provide better therapeutic options to combat GBM in future. Abstract Glioblastoma multiforme (GBM) is one of the debilitating brain tumors, being associated with extremely poor prognosis and short median patient survival. GBM is associated with complex pathogenesis with alterations in various cellular signaling events, that participate in cell proliferation and survival. The impairment in cellular redox pathways leads to tumorigenesis. The current standard pharmacological regimen available for glioblastomas, such as radiotherapy and surgical resection following treatment with chemotherapeutic drug temozolomide, remains fatal, due to drug resistance, metastasis and tumor recurrence. Thus, the demand for an effective therapeutic strategy for GBM remains elusive. Hopefully, novel products from natural compounds are suggested as possible solutions. They protect glial cells by reducing oxidative stress and neuroinflammation, inhibiting proliferation, inducing apoptosis, inhibiting pro-oncogene events and intensifying the potent anti-tumor therapies. Targeting aberrant cellular pathways in the amelioration of GBM could promote the development of new therapeutic options that improve patient quality of life and extend survival. Consequently, our review emphasizes several natural compounds in GBM treatment. We also assessed the potential of drug delivery techniques such as nanoparticles, Gliadel wafers and drug delivery using cellular carriers which could lead to a novel path for the obliteration of GBM.
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Abstract
The Ras oncogene is notoriously difficult to target with specific therapeutics. Consequently, there is interest to better understand the Ras signaling pathways to identify potential targetable effectors. Recently, the mechanistic target of rapamycin complex 2 (mTORC2) was identified as an evolutionarily conserved Ras effector. mTORC2 regulates essential cellular processes, including metabolism, survival, growth, proliferation and migration. Moreover, increasing evidence implicate mTORC2 in oncogenesis. Little is known about the regulation of mTORC2 activity, but proposed mechanisms include a role for phosphatidylinositol (3,4,5)-trisphosphate - which is produced by class I phosphatidylinositol 3-kinases (PI3Ks), well-characterized Ras effectors. Therefore, the relationship between Ras, PI3K and mTORC2, in both normal physiology and cancer is unclear; moreover, seemingly conflicting observations have been reported. Here, we review the evidence on potential links between Ras, PI3K and mTORC2. Interestingly, data suggest that Ras and PI3K are both direct regulators of mTORC2 but that they act on distinct pools of mTORC2: Ras activates mTORC2 at the plasma membrane, whereas PI3K activates mTORC2 at intracellular compartments. Consequently, we propose a model to explain how Ras and PI3K can differentially regulate mTORC2, and highlight the diversity in the mechanisms of mTORC2 regulation, which appear to be determined by the stimulus, cell type, and the molecularly and spatially distinct mTORC2 pools.
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Elfaki I, Mir R, Abu-Duhier FM, Khan R, Sakran M. Phosphatidylinositol 3-kinase Glu545Lys and His1047Tyr Mutations are not Associated with T2D. Curr Diabetes Rev 2020; 16:881-888. [PMID: 31749428 DOI: 10.2174/1573399815666191015142201] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/24/2019] [Accepted: 09/18/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Insulin resistance initiated in peripheral tissues induces type 2 diabetes (T2D). It occurs when insulin signaling is impaired. INTRODUCTION Phosphatidylinositol 3-kinases (PI3K) are important for insulin signaling. Single nucleotide polymorphisms of the PI3K gene have been associated with T2D. METHODS We have investigated the association of Glu545Lys and His1047Tyr mutations of phosphatidylinositol- 4,5-bisphosphate 3-kinase catalytic subunit alpha (PIK3CA) gene with T2D. We have screened 103 T2D patients and 132 controls for Glu545Lys mutation, and 101 T2D patients and 103 controls for the His1047Tyr mutation from a Saudi cohort using AS-PCR. RESULTS Our results indicated that there is no association between the GA genotype of rs104886003 (Glu545Lys) and T2D, OR= 0.15 (95% CI: 0.007-3.28), RR= 0.29(0.02-3.72), P value= 0.23. The A allele is also not associated with T2D diabetes, OR= 1.01(95% CI: 0.70-1.46), RR=1.00(0.85-1.18), P value=0.91. Results showed that CT genotype of rs121913281 (His1047Tyr) was not associated with T2D, OR=0.94(95% CI: 0.23-3.9), RR= 0.97(0.48-1.97), P-value = 0.94, and T allele was also not associated with T2D, OR=1.06 (95% CI: 0.71-1.56), RR= 1.02(0.84-1.24), P-value =0.76. CONCLUSION We conclude that the A allele of rs104886003 may not be associated with T2D. The T allele of rs121913281 may also not associated with T2D. However, future studies with larger sample sizes and in different populations are recommended.
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Affiliation(s)
- Imadeldin Elfaki
- Department of Biochemistry, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
| | - Rashid Mir
- Prince Fahd Bin Sultan Research Chair (PFBSRC), Faculty of Applied Medical Sciences, Medical Laboratory Technology Department, University of Tabuk, Tabuk, Saudi Arabia
| | - Faisel M Abu-Duhier
- Prince Fahd Bin Sultan Research Chair (PFBSRC), Faculty of Applied Medical Sciences, Medical Laboratory Technology Department, University of Tabuk, Tabuk, Saudi Arabia
| | - Roaid Khan
- Department of Endocrinology, King Salman Armed Forces Hospital, Tabuk, Saudi Arabia
| | - Mohammed Sakran
- Department of Biochemistry, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
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A network of phosphatidylinositol 4,5-bisphosphate binding sites regulates gating of the Ca 2+-activated Cl - channel ANO1 (TMEM16A). Proc Natl Acad Sci U S A 2019; 116:19952-19962. [PMID: 31515451 DOI: 10.1073/pnas.1904012116] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
ANO1 (TMEM16A) is a Ca2+-activated Cl- channel that regulates diverse cellular functions including fluid secretion, neuronal excitability, and smooth muscle contraction. ANO1 is activated by elevation of cytosolic Ca2+ and modulated by phosphatidylinositol 4,5-bisphosphate [PI(4,5)P2]. Here, we describe a closely concerted experimental and computational study, including electrophysiology, mutagenesis, functional assays, and extended sampling of lipid-protein interactions with molecular dynamics (MD) to characterize PI(4,5)P2 binding modes and sites on ANO1. ANO1 currents in excised inside-out patches activated by 270 nM Ca2+ at +100 mV are increased by exogenous PI(4,5)P2 with an EC50 = 1.24 µM. The effect of PI(4,5)P2 is dependent on membrane voltage and Ca2+ and is explained by a stabilization of the ANO1 Ca2+-bound open state. Unbiased atomistic MD simulations with 1.4 mol% PI(4,5)P2 in a phosphatidylcholine bilayer identified 8 binding sites with significant probability of binding PI(4,5)P2 Three of these sites captured 85% of all ANO1-PI(4,5)P2 interactions. Mutagenesis of basic amino acids near the membrane-cytosol interface found 3 regions of ANO1 critical for PI(4,5)P2 regulation that correspond to the same 3 sites identified by MD. PI(4,5)P2 is stabilized by hydrogen bonding between amino acid side chains and phosphate/hydroxyl groups on PI(4,5)P2 Binding of PI(4,5)P2 alters the position of the cytoplasmic extension of TM6, which plays a crucial role in ANO1 channel gating, and increases the accessibility of the inner vestibule to Cl- ions. We propose a model consisting of a network of 3 PI(4,5)P2 binding sites at the cytoplasmic face of the membrane allosterically regulating ANO1 channel gating.
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Endosomal trafficking defects in patient cells with KIAA1109 biallelic variants. Genes Dis 2019; 6:56-67. [PMID: 30906834 PMCID: PMC6411657 DOI: 10.1016/j.gendis.2018.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 12/27/2018] [Indexed: 02/06/2023] Open
Abstract
The uncharacterized gene KIAA1 109 has recently been associated with a congenital neurological malformation disorder that variably presents with arthrogryposis, craniofacial and/or cardiac abnormalities. We have identified two additional patients with compound heterozygous KIAA1109 variants presenting with the same neurological malformations. The mechanism whereby KIAA1109 loss of function causes this spectrum of disorders was the primary focus of our studies. We hypothesized that KIAA1109 function could be conserved relative to the fly gene tweek and examined endocytosis and endosome recycling in patient fibroblasts. Furthermore, we examined the structure of the cytoskeleton and cilia based on functional overlap with endocytosis and several known etiologies for neuronal migration disorders. Utilizing primary dermal fibroblasts from one patient and a healthy donor, we performed immunofluorescence and endocytosis assays to examine the endosomal, cytoskeletal, and ciliary cellular phenotypes. We found notable abnormalities in endosomal trafficking and endosome recycling pathways. We also observed changes in the actin cytoskeleton and cilia structural dynamics. We conclude that the function of KIAA1109 in humans may indeed overlap with the function of the Drosophila ortholog, resulting in perturbations to endosomal trafficking and the actin cytoskeleton. These alterations have ripple effects, altering many pathways that are critical for proper neuronal migration and embryonic development.
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Ji J, Rong Y, Luo CL, Li S, Jiang X, Weng H, Chen H, Zhang WW, Xie W, Wang FB. Up-Regulation of hsa-miR-210 Promotes Venous Metastasis and Predicts Poor Prognosis in Hepatocellular Carcinoma. Front Oncol 2018; 8:569. [PMID: 30560088 PMCID: PMC6287006 DOI: 10.3389/fonc.2018.00569] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 11/13/2018] [Indexed: 01/29/2023] Open
Abstract
Objective: To investigate the potential biomarkers for venous metastasis of hepatocellular carcinoma (HCC), and briefly discuss their target genes and the signaling pathways they are involved in. Materials and Method: The dataset GSE6857 was downloaded from GEO. Significantly differentially expressed miRNAs were identified using the R package “limma,” After that, the survival analysis was conducted to discover the significance of these up-regulated miRNAs for the prognosis of HCC patients. Additionally, miRNAs which were up-regulated in venous metastasis positive HCC tissues and were significant for the prognosis of HCC patients were further verified in clinical samples using RT-qPCR. The miRNAs were then analyzed for their correlations with clinical characteristics including survival time, AFP level, pathological grade, TNM stage, tumor stage, lymph-node metastasis, distant metastasis, child-pugh score, vascular invasion, liver fibrosis and race using 375 HCC samples downloaded from the TCGA database. The target genes of these miRNAs were obtained using a miRNA target gene prediction database, and their functions were analyzed using the online tool DAVID. Results: 15 miRNAs were differentially expressed in samples with venous metastasis, among which 7 were up-regulated in venous metastasis positive HCC samples. As one of the up-regulated miRNAs, hsa-miR-210 was identified as an independent prognostic factor for HCC. Using RT-qPCR, it was evident that hsa-miR-210 expression was significantly higher in venous metastasis positive HCC samples (p = 0.0036). Further analysis indicated that hsa-miR-210 was positively associated with AFP level, pathological grade, TNM stage, tumor stage and vascular invasion. A total of 168 hsa-miR-210 target genes, which are mainly related to tumor metastasis and tumor signaling pathways, were also predicted in this study. Conclusion: hsa-miR-210 might promote vascular invasion of HCC cells and could be used as a prognostic biomarker.
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Affiliation(s)
- Jia Ji
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China.,Department of Laboratory Medicine, Wuhan Children's Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yuan Rong
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Chang-Liang Luo
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Shuo Li
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xiang Jiang
- Department of Hepatobiliary and Pancreatic Surgery, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Hong Weng
- Center for Evidence-Based and Translational Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Hao Chen
- Department of Pathology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wu-Wen Zhang
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Wen Xie
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Fu-Bing Wang
- Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, China
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13
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Cui P, Ma X, Li H, Lang W, Hao J. Shared Biological Pathways Between Alzheimer's Disease and Ischemic Stroke. Front Neurosci 2018; 12:605. [PMID: 30245614 PMCID: PMC6137293 DOI: 10.3389/fnins.2018.00605] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/10/2018] [Indexed: 12/21/2022] Open
Abstract
Alzheimer's disease (AD) and ischemic stroke (IS) are an immense socioeconomic burden worldwide. There is a possibility that shared genetic factors lead to their links at epidemiological and pathophysiological levels. Although recent genome-wide association studies (GWAS) have provided profound insights into the genetics of AD and IS, no shared genetic variants have been identified to date. This prompted us to initiate this study, which sought to identify shared pathways linking AD and IS. We took advantage of large-scale GWAS summary data of AD (17,008 AD cases and 37,154 controls) and IS (10,307 cases and 19,326 controls) to conduct pathway analyses using genetic pathways from multiple well-studied databases, including GO, KEGG, PANTHER, Reactome, and Wikipathways. Collectively, we discovered that AD and IS shared 179 GO categories (56 biological processes, 95 cellular components, and 28 molecular functions); and the following pathways: six KEGG pathways; two PANTHER pathways; four Reactome pathways; and one in Wikipathways pathway. The more fine-grained GO terms were mainly summarized into different functional categories: transcriptional and post-transcriptional regulation, synapse, endocytic membrane traffic through the endosomal system, signaling transduction, immune process, multi-organism process, protein catabolic metabolism, and cell adhesion. The shared pathways were roughly classified into three categories: immune system; cancer (NSCLC and glioma); and signal transduction pathways involving the cadherin signaling pathway, Wnt signaling pathway, G-protein signaling and downstream signaling mediated by phosphoinositides (PIPs). The majority of these common pathways linked to both AD and IS were supported by convincing evidence from the literature. In conclusion, our findings contribute to a better understanding of common biological mechanisms underlying AD and IS and serve as a guide to direct future research.
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Affiliation(s)
- Pan Cui
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education and Tianjin City, Tianjin, China
| | - Xiaofeng Ma
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education and Tianjin City, Tianjin, China
| | - He Li
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education and Tianjin City, Tianjin, China
| | - Wenjing Lang
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education and Tianjin City, Tianjin, China
| | - Junwei Hao
- Department of Neurology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, China.,Key Laboratory of Post-neurotrauma Neuro-repair and Regeneration in Central Nervous System, Tianjin Neurological Institute, Ministry of Education and Tianjin City, Tianjin, China
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14
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Tavares MK, dos Reis S, Platt N, Heinrich IA, Wolin IA, Leal RB, Kaster MP, Rodrigues ALS, Freitas AE. Agmatine potentiates neuroprotective effects of subthreshold concentrations of ketamine via mTOR/S6 kinase signaling pathway. Neurochem Int 2018; 118:275-285. [DOI: 10.1016/j.neuint.2018.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 05/08/2018] [Accepted: 05/11/2018] [Indexed: 12/24/2022]
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15
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Feng J, He L, Li Y, Xiao F, Hu G. Modeling of PH Domains and Phosphoinositides Interactions and Beyond. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1111:19-32. [DOI: 10.1007/5584_2018_236] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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PI3K/Akt/mTOR signaling pathway and targeted therapy for glioblastoma. Oncotarget 2017; 7:33440-50. [PMID: 26967052 PMCID: PMC5078108 DOI: 10.18632/oncotarget.7961] [Citation(s) in RCA: 354] [Impact Index Per Article: 50.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 02/24/2016] [Indexed: 12/12/2022] Open
Abstract
Glioblastoma multiform (GBM) is the most common malignant glioma of all the brain tumors and currently effective treatment options are still lacking. GBM is frequently accompanied with overexpression and/or mutation of epidermal growth factor receptor (EGFR), which subsequently leads to activation of many downstream signal pathways such as phosphatidylinositol 3-kinase (PI3K)/Akt/rapamycin-sensitive mTOR-complex (mTOR) pathway. Here we explored the reason why inhibition of the pathway may serve as a compelling therapeutic target for the disease, and provided an update data of EFGR and PI3K/Akt/mTOR inhibitors in clinical trials.
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17
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Hocher B, Adamski J. Metabolomics for clinical use and research in chronic kidney disease. Nat Rev Nephrol 2017; 13:269-284. [PMID: 28262773 DOI: 10.1038/nrneph.2017.30] [Citation(s) in RCA: 214] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Chronic kidney disease (CKD) has a high prevalence in the general population and is associated with high mortality; a need therefore exists for better biomarkers for diagnosis, monitoring of disease progression and therapy stratification. Moreover, very sensitive biomarkers are needed in drug development and clinical research to increase understanding of the efficacy and safety of potential and existing therapies. Metabolomics analyses can identify and quantify all metabolites present in a given sample, covering hundreds to thousands of metabolites. Sample preparation for metabolomics requires a very fast arrest of biochemical processes. Present key technologies for metabolomics are mass spectrometry and proton nuclear magnetic resonance spectroscopy, which require sophisticated biostatistic and bioinformatic data analyses. The use of metabolomics has been instrumental in identifying new biomarkers of CKD such as acylcarnitines, glycerolipids, dimethylarginines and metabolites of tryptophan, the citric acid cycle and the urea cycle. Biomarkers such as c-mannosyl tryptophan and pseudouridine have better performance in CKD stratification than does creatinine. Future challenges in metabolomics analyses are prospective studies and deconvolution of CKD biomarkers from those of other diseases such as metabolic syndrome, diabetes mellitus, inflammatory conditions, stress and cancer.
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Affiliation(s)
- Berthold Hocher
- Department of Basic Medicine, Medical College of Hunan University, 410006 Changsha, China
| | - Jerzy Adamski
- Institute of Experimental Genetics, Genome Analysis Center, Helmholtz Zentrum München, German Research Center for Environmental Health, Ingolstaedter Landstrasse 1, 85764 Neuherberg, Germany
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18
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Ríos-Marco P, Marco C, Gálvez X, Jiménez-López JM, Carrasco MP. Alkylphospholipids: An update on molecular mechanisms and clinical relevance. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:1657-1667. [PMID: 28238819 DOI: 10.1016/j.bbamem.2017.02.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 02/20/2017] [Accepted: 02/21/2017] [Indexed: 11/16/2022]
Abstract
Alkylphospholipids (APLs) represent a new class of drugs which do not interact directly with DNA but act on the cell membrane where they accumulate and interfere with lipid metabolism and signalling pathways. This review summarizes the mode of action at the molecular level of these compounds. In this sense, a diversity of mechanisms has been suggested to explain the actions of clinically-relevant APLs, in particular, in cancer treatment. One consistently reported finding is that APLs reduce the biosynthesis of phosphatidylcholine (PC) by inhibiting the rate-limiting enzyme CTP:phosphocholine cytidylyltransferase (CT). APLs also alter intracellular cholesterol traffic and metabolism in human tumour-cell lines, leading to an accumulation of cholesterol inside the cell. An increase in cholesterol biosynthesis associated with a decrease in the synthesis of choline-containing phospholipids and cholesterol esterification leads to a change in the free-cholesterol:PC ratio in cells exposed to APLs. Akt phosphorylation status after APL exposure shows that this critical regulator for cell survival is modulated by changes in cholesterol levels induced in the plasma membrane by these lipid analogues. Furthermore, APLs produce cell ultrastructural alterations with an abundant autophagic vesicles and autolysosomes in treated cells, indicating an interference of autophagy process after APL exposure. Thus, antitumoural APLs interfere with the proliferation of tumour cells via a complex mechanism involving phospholipid and cholesterol metabolism, interfere with lipid-dependent survival-signalling pathways and autophagy. Although APLs also exert antiparasitic, antibacterial, and antifungal effects, in this review we provide a summary of the antileishmanial activity of these lipid analogues. This article is part of a Special Issue entitled: Membrane Lipid Therapy: Drugs Targeting Biomembranes edited by Pablo V. Escribá.
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Affiliation(s)
- Pablo Ríos-Marco
- Department of Biochemistry and Molecular Biology I, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, Granada 18001, Spain
| | - Carmen Marco
- Department of Biochemistry and Molecular Biology I, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, Granada 18001, Spain
| | - Xiomara Gálvez
- Department of Biochemistry and Molecular Biology I, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, Granada 18001, Spain
| | - José M Jiménez-López
- Department of Biochemistry and Molecular Biology I, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, Granada 18001, Spain.
| | - María P Carrasco
- Department of Biochemistry and Molecular Biology I, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, Granada 18001, Spain.
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19
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Thomas MP, Erneux C, Potter BVL. SHIP2: Structure, Function and Inhibition. Chembiochem 2017; 18:233-247. [DOI: 10.1002/cbic.201600541] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Mark P. Thomas
- Department of Pharmacy and Pharmacology; University of Bath; Claverton Down Bath BA2 7AY UK
| | - Christophe Erneux
- I.R.I.B.H.M.; Université Libre de Bruxelles; Campus Erasme 808 Route de Lennik 1070 Brussels Belgium
| | - Barry V. L. Potter
- Drug Discovery and Medicinal Chemistry; Department of Pharmacology; University of Oxford; Mansfield Road Oxford OX1 3QT UK
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20
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Van Aelst B, Devloo R, Zachée P, t'Kindt R, Sandra K, Vandekerckhove P, Compernolle V, Feys HB. Psoralen and Ultraviolet A Light Treatment Directly Affects Phosphatidylinositol 3-Kinase Signal Transduction by Altering Plasma Membrane Packing. J Biol Chem 2016; 291:24364-24376. [PMID: 27687726 DOI: 10.1074/jbc.m116.735126] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 09/17/2016] [Indexed: 01/15/2023] Open
Abstract
Psoralen and ultraviolet A light (PUVA) are used to kill pathogens in blood products and as a treatment of aberrant cell proliferation in dermatitis, cutaneous T-cell lymphoma, and graft-versus-host disease. DNA damage is well described, but the direct effects of PUVA on cell signal transduction are poorly understood. Because platelets are anucleate and contain archetypal signal transduction machinery, they are ideally suited to address this. Lipidomics on platelet membrane extracts showed that psoralen forms adducts with unsaturated carbon bonds of fatty acyls in all major phospholipid classes after PUVA. Such adducts increased lipid packing as measured by a blue shift of an environment-sensitive fluorescent probe in model liposomes. Furthermore, the interaction of these liposomes with lipid order-sensitive proteins like amphipathic lipid-packing sensor and α-synuclein was inhibited by PUVA. In platelets, PUVA caused poor membrane binding of Akt and Bruton's tyrosine kinase effectors following activation of the collagen glycoprotein VI and thrombin protease-activated receptor (PAR) 1. This resulted in defective Akt phosphorylation despite unaltered phosphatidylinositol 3,4,5-trisphosphate levels. Downstream integrin activation was furthermore affected similarly by PUVA following PAR1 (effective half-maximal concentration (EC50), 8.4 ± 1.1 versus 4.3 ± 1.1 μm) and glycoprotein VI (EC50, 1.61 ± 0.85 versus 0.26 ± 0.21 μg/ml) but not PAR4 (EC50, 50 ± 1 versus 58 ± 1 μm) signal transduction. Our findings were confirmed in T-cells from graft-versus-host disease patients treated with extracorporeal photopheresis, a form of systemic PUVA. In conclusion, PUVA increases the order of lipid phases by covalent modification of phospholipids, thereby inhibiting membrane recruitment of effector kinases.
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Affiliation(s)
- Britt Van Aelst
- From the Transfusion Research Center, Belgian Red Cross-Flanders, 9000 Ghent, Belgium
| | - Rosalie Devloo
- From the Transfusion Research Center, Belgian Red Cross-Flanders, 9000 Ghent, Belgium
| | - Pierre Zachée
- the Department of Hematology, Hospital Network Antwerp, 2000 Antwerp, Belgium
| | - Ruben t'Kindt
- the Research Institute for Chromatography, 8500 Kortrijk, Belgium
| | - Koen Sandra
- the Research Institute for Chromatography, 8500 Kortrijk, Belgium
| | - Philippe Vandekerckhove
- the Blood Service of the Belgian Red Cross-Flanders, 2800 Mechelen, Belgium,; the Department of Public Health and Primary Care, KULeuven, 3000 Leuven, Belgium, and; the Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Veerle Compernolle
- From the Transfusion Research Center, Belgian Red Cross-Flanders, 9000 Ghent, Belgium,; the Blood Service of the Belgian Red Cross-Flanders, 2800 Mechelen, Belgium,; the Faculty of Medicine and Health Sciences, Ghent University, 9000 Ghent, Belgium
| | - Hendrik B Feys
- From the Transfusion Research Center, Belgian Red Cross-Flanders, 9000 Ghent, Belgium,.
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21
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Riehle R, Pattni B, Jhaveri A, Kulkarni A, Thakur G, Degterev A, Torchilin V. Combination Nanopreparations of a Novel Proapoptotic Drug - NCL-240, TRAIL and siRNA. Pharm Res 2016; 33:1587-601. [PMID: 26951567 DOI: 10.1007/s11095-016-1899-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 03/01/2016] [Indexed: 12/21/2022]
Abstract
PURPOSE To develop a multifunctional nanoparticle system carrying a combination of pro-apoptotic drug, NCL-240, TRAIL [tumor necrosis factor-α (TNF-α)-related apoptosis-inducing ligand] and anti-survivin siRNA and to test the combination preparation for anti-cancer effects in different cancer cells. METHODS Polyethylene glycol-phosphoethanolamine (PEG-PE) - based polymeric micelles were prepared carrying NCL-240. These micelles were used in combination with TRAIL-conjugated micelles and anti-survivin siRNA-S-S-PE containing micelles. All the micelles were characterized for size, zeta potential, and drug encapsulation efficiency. Different cancer cells were used to study the cytotoxicity potential of the individual as well as the combination formulations. Other cell based assays included cellular association studies of transferrin-targeted NCL-240 micelles and study of cellular survivin protein downregulation by anti-survivin siRNA-S-S-PE containing micelles. RESULTS NCL-240 micelles and the combination NCL-240/TRAIL micelles significantly increased cytotoxicity in the resistant strains of SKOV-3, MCF-7 and A549 as compared to free drugs or single drug formulations. The NCL-240/TRAIL micelles were also more effective in NCI/ADR-RES cancer cell spheroids. Anti-survivin siRNA micelles alone displayed a dose-dependent reduction in survivin protein levels in A2780 cells. Treatment with NCL-240/TRAIL after pre-incubation with anti-survivin siRNA inhibited cancer cell proliferation. Additionally, a single multifunctional system composed of NCL-240/TRAIL/siRNA PM also had significant cytotoxic effects in vitro in multiple cell lines. CONCLUSION These results demonstrate the efficacy of a combination of small-molecule PI3K inhibitors, TRAIL, and siRNA delivered by micellar preparations in multiple cancer cell lines.
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Affiliation(s)
- Robert Riehle
- Center for Pharmaceutical Biotechnology and Nanomedicine, Department of Pharmaceutical Sciences, Northeastern University, 140 The Fenway, Room 236, 360 Huntington Avenue, Boston, Massachusetts, 02115, USA
| | - Bhushan Pattni
- Center for Pharmaceutical Biotechnology and Nanomedicine, Department of Pharmaceutical Sciences, Northeastern University, 140 The Fenway, Room 236, 360 Huntington Avenue, Boston, Massachusetts, 02115, USA
| | - Aditi Jhaveri
- Center for Pharmaceutical Biotechnology and Nanomedicine, Department of Pharmaceutical Sciences, Northeastern University, 140 The Fenway, Room 236, 360 Huntington Avenue, Boston, Massachusetts, 02115, USA
| | - Abhijit Kulkarni
- Center for Pharmaceutical Biotechnology and Nanomedicine, Department of Pharmaceutical Sciences, Northeastern University, 140 The Fenway, Room 236, 360 Huntington Avenue, Boston, Massachusetts, 02115, USA
| | - Ganesh Thakur
- Center for Pharmaceutical Biotechnology and Nanomedicine, Department of Pharmaceutical Sciences, Northeastern University, 140 The Fenway, Room 236, 360 Huntington Avenue, Boston, Massachusetts, 02115, USA
| | - Alexei Degterev
- Department of Biochemistry, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Vladimir Torchilin
- Center for Pharmaceutical Biotechnology and Nanomedicine, Department of Pharmaceutical Sciences, Northeastern University, 140 The Fenway, Room 236, 360 Huntington Avenue, Boston, Massachusetts, 02115, USA. .,Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
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22
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Mazereeuw G, Herrmann N, Ma DWL, Hillyer LM, Oh PI, Lanctôt KL. Omega-3/omega-6 fatty acid ratios in different phospholipid classes and depressive symptoms in coronary artery disease patients. Brain Behav Immun 2016; 53:54-58. [PMID: 26697998 DOI: 10.1016/j.bbi.2015.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/19/2015] [Accepted: 12/13/2015] [Indexed: 12/13/2022] Open
Abstract
Depressive symptoms are highly incident among coronary artery disease (CAD) patients and increase mortality. Reduced ratios of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) (omega-3 fatty acids) to arachidonic acid (AA, omega-6 fatty acid) concentrations have been linked with depressive symptoms in CAD. It remains unclear whether depressive symptoms are differentially associated with that ratio in different phospholipid classes, and this may have mechanistic implications. This study investigated associations between depressive symptoms in CAD patients and the EPA+DHA to AA ratio in the major phospholipid classes. This was a cross-sectional study of stable CAD patients. Sociodemographic, medical, medication, and cardiopulmonary fitness data were collected from each patient. Each patient was assessed for depressive symptoms using the 17-item Hamilton Depression Rating Scale (HAM-D). The percentage of EPA, DHA, and AA in each erythrocyte phospholipid class was determined using gas chromatography from fasting blood. Relationships between EPA+DHA to AA ratios and depressive symptoms were assessed using linear regression and were corrected for multiple comparisons. Seventy-six CAD patients were included (age=61.9 ± 8.5, 74% male, HAM-D=7.2 ± 5.9). In a backward elimination linear regression model, lower EPA+DHA to AA in erythrocyte phosphatidylinositol (B=-12.71, β=-0.33, p<.01) and sphingomyelin (B=-2.52, β=-0.37, p<.01) was associated with greater depressive symptom severity, independently of other known predictors. Other phospholipid classes were not associated with depressive symptoms. In conclusion, the relationship between EPA+DHA to AA ratios and depressive symptoms in CAD may not be consistent across phospholipid classes. Continued investigation of these potentially differential relationships may clarify underlying disease mechanisms.
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Affiliation(s)
- Graham Mazereeuw
- Sunnybrook Research Institute, Toronto, Ontario, Canada; Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Nathan Herrmann
- Sunnybrook Research Institute, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada
| | - David W L Ma
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Lyn M Hillyer
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Paul I Oh
- Sunnybrook Research Institute, Toronto, Ontario, Canada; University Health Network at Toronto Rehabilitation Institute, Toronto, Ontario, Canada
| | - Krista L Lanctôt
- Sunnybrook Research Institute, Toronto, Ontario, Canada; Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada; University Health Network at Toronto Rehabilitation Institute, Toronto, Ontario, Canada; Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada.
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23
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Cao L, Liu P, Gill K, Reece EA, Cheema AK, Zhao Z. Identification of novel cell survival regulation in diabetic embryopathy via phospholipidomic profiling. Biochem Biophys Res Commun 2016; 470:599-605. [PMID: 26797275 PMCID: PMC4756589 DOI: 10.1016/j.bbrc.2016.01.098] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 01/15/2016] [Indexed: 01/01/2023]
Abstract
Diabetes mellitus in early pregnancy causes birth defects by disturbing metabolic homeostasis and increasing programmed cell death in the embryo. Over-activation of phospholipase Cβ3 and γ1 suggests disturbed phospholipid metabolism, which is an important in regulation of cell signaling and activity. Metabolomic examinations reveal significant changes in the profile of phospholipid metabolism. Among the metabolites, levels of phosphatidylinositol bisphosphate (PIP2) are increased. PIP2 effector PTEN (phosphatase and tensin homolog deleted on chromosome 10) is activated. Activation of protein kinase Bα (PKBα, or AKT1) and mTOR (mechanistic target of rapamycin) is decreased. Inhibition of PLCs and PTEN suppresses over-generation of reactive oxygen species and inhibition of PLCs prevents fragmentation of mitochondria in neural stem cells cultured in high glucose. These observations suggest that maternal hyperglycemia disrupts phospholipid metabolism, leading to perturbation of mitochondrial dynamics and redox homeostasis and suppression of the PKB-mTOR cell survival signaling in the embryos.
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Affiliation(s)
- Lixue Cao
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Peiyan Liu
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kirandeep Gill
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA
| | - E A Reece
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Amrita K Cheema
- Department of Oncology, Georgetown University Medical Center, Washington, DC, USA; Department of Biochemistry, Molecular and Cellular Biology, Georgetown University Medical Center, Washington, DC, USA
| | - Zhiyong Zhao
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD, USA; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, USA.
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24
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Sriraman SK, Geraldo V, Luther E, Degterev A, Torchilin V. Cytotoxicity of PEGylated liposomes co-loaded with novel pro-apoptotic drug NCL-240 and the MEK inhibitor cobimetinib against colon carcinoma in vitro. J Control Release 2015; 220:160-168. [PMID: 26497930 DOI: 10.1016/j.jconrel.2015.10.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 10/08/2015] [Accepted: 10/19/2015] [Indexed: 01/21/2023]
Abstract
The overactivation of signaling pathways, such as the PI3K and MAPK, which are crucial to cell growth and survival, is a common feature in many cancer types. Though a number of advances have been made in the development of molecular agents targeting these pathways, their application as monotherapies has not significantly improved clinical outcome. A novel liposomal preparation was developed, co-loaded with NCL-240, a small-molecule inhibitor of the PI3K/mTOR pathway, along with cobimetinib, a MEK/ERK pathway inhibitor. This combination drug-loaded nanocarrier, (N+C)-LP, was able to significantly enhance the cytotoxicity of these drugs against colon carcinoma cells in vitro demonstrating a clear synergistic effect (combination index of 0.79). The (N+C)-LP was also able to induce cell cycle arrest of the cells, specifically in the G1 phase thereby preventing their progression to the S-phase, typical of the action of MEK inhibitors. Analyzing the apoptotic events, it was found that this effect on cell cycle regulation is followed by the induction of apoptosis. The quantified distribution of apoptotic events showed that the (N+C)-LP induced apoptosis significantly by over 3-4 fold (P<0.001) compared to other treatment groups. The co-loaded liposomal preparation was also targeted to the transferrin receptor of cancer cells by modifying the surface of the liposome with transferrin. FACS analysis showed that transferrin-mediated targeting enhanced the association of liposomes to HCT 116 cells by almost 5-fold. This could potentially allow for cancer cell-specific effects in vivo thereby minimizing any non-specific interactions of the liposomes with non-cancerous cells. Taken together, this study clearly shows that the combined inhibition of the PI3K and MEK pathways correlates with a significant anti-proliferative effect, due to cell-cycle regulation leading to the induction of apoptosis.
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Affiliation(s)
- Shravan Kumar Sriraman
- Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, MA 02115, USA
| | - Vananelia Geraldo
- Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, MA 02115, USA; São Carlos Institute of Physics, University of São Paulo, São Carlos, SP 13566-590, Brazil
| | - Ed Luther
- Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, MA 02115, USA
| | - Alexei Degterev
- Department of Biochemistry, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Vladimir Torchilin
- Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, MA 02115, USA; Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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25
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Lee H, Nevarez L, Lachman RS, Wilcox WR, Krakow D, Cohn DH. A second locus for Schneckenbecken dysplasia identified by a mutation in the gene encoding inositol polyphosphate phosphatase-like 1 (INPPL1). Am J Med Genet A 2015; 167A:2470-3. [PMID: 25997753 DOI: 10.1002/ajmg.a.37173] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 05/06/2015] [Indexed: 02/04/2023]
Affiliation(s)
- Hane Lee
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| | - Lisette Nevarez
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California
| | - Ralph S Lachman
- International Skeletal Dysplasia Registry, University of California Los Angeles, Los Angeles, California
| | - William R Wilcox
- Division of Medical Genetics, Department of Human Genetics, Emory University, Decatur, Georgia
| | - Deborah Krakow
- International Skeletal Dysplasia Registry, University of California Los Angeles, Los Angeles, California.,Departments of Orthopaedic Surgery, Los Angeles, California.,Human Genetics, Los Angeles, California.,Obstetrics and Gynecology, University of California Los Angeles, Los Angeles, California
| | - Daniel H Cohn
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California.,International Skeletal Dysplasia Registry, University of California Los Angeles, Los Angeles, California.,Departments of Orthopaedic Surgery, Los Angeles, California
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Manna P, Jain SK. Phosphatidylinositol-3,4,5-triphosphate and cellular signaling: implications for obesity and diabetes. Cell Physiol Biochem 2015; 35:1253-75. [PMID: 25721445 DOI: 10.1159/000373949] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2015] [Indexed: 12/26/2022] Open
Abstract
Phosphatidylinositol-3,4,5-triphosphate (PtdIns(3,4,5)P₃) is one of the most important phosphoinositides and is capable of activating a wide range of proteins through its interaction with their specific binding domains. Localization and activation of these effector proteins regulate a number of cellular functions, including cell survival, proliferation, cytoskeletal rearrangement, intracellular vesicle trafficking, and cell metabolism. Phosphoinositides have been investigated as an important agonist-dependent second messenger in the regulation of diverse physiological events depending upon the phosphorylation status of their inositol group. Dysregulation in formation as well as metabolism of phosphoinositides is associated with various pathophysiological disorders such as inflammation, allergy, cardiovascular diseases, cancer, and metabolic diseases. Recent studies have demonstrated that the impaired metabolism of PtdIns(3,4,5)P₃ is a prime mediator of insulin resistance associated with various metabolic diseases including obesity and diabetes. This review examines the current status of the role of PtdIns(3,4,5)P₃ signaling in the regulation of various cellular functions and the implications of dysregulated PtdIns(3,4,5)P₃ signaling in obesity, diabetes, and their associated complications.
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Affiliation(s)
- Prasenjit Manna
- Department of Pediatrics, Louisiana State University Health Sciences Center, Shreveport, LA, USA
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Li B, Krakow D, Nickerson DA, Bamshad MJ, Chang Y, Lachman RS, Yilmaz A, Kayserili H, Cohn DH. Opsismodysplasia resulting from an insertion mutation in the SH2 domain, which destabilizes INPPL1. Am J Med Genet A 2014; 164A:2407-11. [PMID: 24953221 DOI: 10.1002/ajmg.a.36640] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 05/08/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Bing Li
- Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, California
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