Dev117887 128..139

نویسندگان

  • Guohua Yuan
  • Guobin Yang
  • Yuqian Zheng
  • Xiaojing Zhu
  • Zhi Chen
  • Zunyi Zhang
  • YiPing Chen
چکیده

BMP and Wnt signaling pathways play a crucial role in organogenesis, including tooth development. Despite extensive studies, the exact functions, as well as if and how these two pathways act coordinately in regulating early tooth development, remain elusive. In this study, we dissected regulatory functions of BMP and Wnt pathways in early tooth development using a transgenic noggin (Nog) overexpression model (K14Cre;pNog). It exhibits early arrested tooth development, accompanied by reduced cell proliferation and loss of odontogenic fate markerPitx2 expression in the dental epithelium.We demonstrated that overexpression ofNog disrupted BMP non-canonical activity, which led to a dramatic reduction of cell proliferation rate but did not affect Pitx2 expression. We further identified a novel function of Nog by inhibiting Wnt/β-catenin signaling, causing loss of Pitx2 expression. Co-immunoprecipitationandTOPflashassays revealeddirect bindingof Nog toWnts to functionally prevent Wnt/β-catenin signaling. In situ PLA and immunohistochemistryonNogmutants confirmed invivo interaction betweenendogenousNogandWntsandmodulationofWntsignalingby Nog in tooth germs. Genetic rescue experiments presented evidence that bothBMPandWntsignalingpathways contribute to cell proliferation regulation in thedentalepithelium,withWntsignalingalsocontrolling the odontogenic fate. Reactivation of both BMP and Wnt signaling pathways, but not of only one of them, rescued tooth developmental defects inK14Cre;pNogmice, inwhichWnt signaling canbe substituted by transgenic activation of Pitx2. Our results reveal the orchestration of non-canonical BMP and Wnt/β-catenin signaling pathways in the regulation of early tooth development.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Development and Application of the Automated Geospatial Watershed Assessment Tool

CONTENTS Introduction __________________________________________________________________________________________________________________ 128 Overview of the AGWA Tool ____________________________________________________________________________ 129 Hydrologic Models ________________________________________________________________________________________ 132 KINEROS2 _____________________________...

متن کامل

Table DP-1. Profile of General Demographic Characteristics: 2000 Geographic area: Pine Crest CDP, Tennessee

Under 5 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 5.8 5 to 9 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155 5.4 10 to 14 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 4.8 15 to 19 years . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169 5.9 20 to 24 years . . . . . . . . . . . . . . . . . . . . ....

متن کامل

Biology, Evolution, and Psychological Development

WHAT IS PSYCHOLOGY? 115 A RELATIONAL DEVELOPMENTAL SYSTEMS APPROACH 117 BIOLOGICAL FACTORS IN BEHAVIORAL DEVELOPMENT: EVOLUTION AND GENETICS 118 Evolution 118 Genetics—The Mechanism of Evolution? 125 BIOLOGICAL FACTORS IN BEHAVIORAL DEVELOPMENT: THE BRAIN AND NERVOUS SYSTEM 127 Brain and Mind 128 Contemporary Neuroscience and Its Problems 130 BIOLOGY AND DEVELOPMENT 135 Role of the Gene in Deve...

متن کامل

Alkaloids as Inhibitors of Monoamine Oxidases and Their Role in the Central Nervous System

Chapter Outline Introduction 123 Therapeutic Potential of Monoamine Oxidase Inhibition in Neurological Disorders 124 Depression 125 Parkinson’s Disease 126 Other Neurodegenerative Diseases 126 Smoke and Alcohol Cessation 127 Alkaloids as Monoamine Oxidase Inhibitors 127 Indole Alkaloids 128 Isoquinoline Alkaloids 134 Piperidine Alkaloids 137 Desoxypeganine 138 Other Alkaloids 139 Conclusion 141...

متن کامل

Analysis of ToxR-dependent transcription activation of ompU, the gene encoding a major envelope protein in Vibrio cholerae.

The membrane proteins ToxR and ToxS regulate a variety of genes associated with the virulence of Vibrio cholerae, the agent of human cholera. One of the ToxRS-regulated genes is the ompU gene, which encodes a porin that may also act as an adhesin. To begin to understand the mechanism of ompU transcription activation by ToxRS, we performed genetic and biochemical studies on the ompU promoter. De...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014