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      The Emerging Role of Sperm-Associated Antigen 6 Gene in the Microtubule Function of Cells and Cancer

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          Abstract

          Accumulated evidence shows that sperm-associated antigen 6 (SPAG6) gene has multiple biological functions. It maintains the normal function of a variety of cells including ciliary/flagellar biogenesis and polarization, neurogenesis, and neuronal migration. Moreover, SPAG6 is found to be critically involved in auditory transduction and the fibroblast life cycle. Furthermore, SPAG6 plays an essential role in immuno-regulation. Notably, SPAG6 has been demonstrated to participate in the occurrence and progression of a variety of human cancers. New evidence shows that SPAG6 gene regulates tumor cell proliferation, apoptosis, invasion, and metastasis. Therefore, in this review, we describe the physiological function and mechanism of SPAG6 in human normal cells and cancer cells. We also highlight that SPAG6 gene may be an effective biomarker for the diagnosis of human cancer. Taken together, targeting SPAG6 could be a novel strategy for the treatment of human diseases including cancer.

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          Most cited references52

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          Extrinsic versus intrinsic apoptosis pathways in anticancer chemotherapy.

          Apoptosis or programmed cell death is a key regulator of physiological growth control and regulation of tissue homeostasis. One of the most important advances in cancer research in recent years is the recognition that cell death mostly by apoptosis is crucially involved in the regulation of tumor formation and also critically determines treatment response. Killing of tumor cells by most anticancer strategies currently used in clinical oncology, for example, chemotherapy, gamma-irradiation, suicide gene therapy or immunotherapy, has been linked to activation of apoptosis signal transduction pathways in cancer cells such as the intrinsic and/or extrinsic pathway. Thus, failure to undergo apoptosis may result in treatment resistance. Understanding the molecular events that regulate apoptosis in response to anticancer chemotherapy, and how cancer cells evade apoptotic death, provides novel opportunities for a more rational approach to develop molecular-targeted therapies for combating cancer.
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            Prestin is the motor protein of cochlear outer hair cells.

            The outer and inner hair cells of the mammalian cochlea perform different functions. In response to changes in membrane potential, the cylindrical outer hair cell rapidly alters its length and stiffness. These mechanical changes, driven by putative molecular motors, are assumed to produce amplification of vibrations in the cochlea that are transduced by inner hair cells. Here we have identified an abundant complementary DNA from a gene, designated Prestin, which is specifically expressed in outer hair cells. Regions of the encoded protein show moderate sequence similarity to pendrin and related sulphate/anion transport proteins. Voltage-induced shape changes can be elicited in cultured human kidney cells that express prestin. The mechanical response of outer hair cells to voltage change is accompanied by a 'gating current', which is manifested as nonlinear capacitance. We also demonstrate this nonlinear capacitance in transfected kidney cells. We conclude that prestin is the motor protein of the cochlear outer hair cell.
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              Dishevelled controls apical docking and planar polarization of basal bodies in ciliated epithelial cells.

              The planar cell polarity (PCP) signaling system governs many aspects of polarized cell behavior. Here, we use an in vivo model of vertebrate mucociliary epithelial development to show that Dishevelled (Dvl) is essential for the apical positioning of basal bodies. We find that Dvl and Inturned mediate the activation of the Rho GTPase specifically at basal bodies, and that these three proteins together mediate the docking of basal bodies to the apical plasma membrane. Moreover, we find that this docking involves a Dvl-dependent association of basal bodies with membrane-bound vesicles and the vesicle-trafficking protein, Sec8. Once docked, basal bodies again require Dvl and Rho for the planar polarization that underlies directional beating of cilia. These results demonstrate previously undescribed functions for PCP signaling components and suggest that a common signaling apparatus governs both apical docking and planar polarization of basal bodies.
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                Author and article information

                Contributors
                Journal
                Mol Ther Oncolytics
                Mol Ther Oncolytics
                Molecular Therapy Oncolytics
                American Society of Gene & Cell Therapy
                2372-7705
                10 September 2019
                20 December 2019
                10 September 2019
                : 15
                : 101-107
                Affiliations
                [1 ]Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, China
                [2 ]Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui 233030, China
                [3 ]Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
                Author notes
                []Corresponding author: Yi-Sheng Tao, Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, China. taoyishengbbyxy@ 123456163.com
                [∗∗ ]Corresponding author: Da-Min Chai, Department of Pathology, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233030, China. msautumn@ 123456163.com
                [∗∗∗ ]Corresponding author: Z. Peter Wang, Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA. zwang6@ 123456bidmc.harvard.edu
                [4]

                These authors contributed equally to this work.

                Article
                S2372-7705(19)30082-8
                10.1016/j.omto.2019.08.011
                6807308
                31660426
                3bf4aef2-e0b1-4669-9722-077312095038
                © 2019 The Author(s)

                This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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                Article

                spag6,microtubule,apoptosis,cancer,proliferation
                spag6, microtubule, apoptosis, cancer, proliferation

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