論文 - 詳細
| RRC ID | 6414 |
|---|---|
| 著者 | Nadarajan S, Govindan JA, McGovern M, Hubbard EJ, Greenstein D. |
| タイトル | MSP and GLP-1/Notch signaling coordinately regulate actomyosin-dependent cytoplasmic streaming and oocyte growth in C. elegans. |
| ジャーナル | Development |
| Abstract |
Fertility depends on germline stem cell proliferation, meiosis and gametogenesis, yet how these key transitions are coordinated is unclear. In C. elegans, we show that GLP-1/Notch signaling functions in the germline to modulate oocyte growth when sperm are available for fertilization and the major sperm protein (MSP) hormone is present. Reduction-of-function mutations in glp-1 cause oocytes to grow abnormally large when MSP is present and Galpha(s)-adenylate cyclase signaling in the gonadal sheath cells is active. By contrast, gain-of-function glp-1 mutations lead to the production of small oocytes. Surprisingly, proper oocyte growth depends on distal tip cell signaling involving the redundant function of GLP-1 ligands LAG-2 and APX-1. GLP-1 signaling also affects two cellular oocyte growth processes, actomyosin-dependent cytoplasmic streaming and oocyte cellularization. glp-1 reduction-of-function mutants exhibit elevated rates of cytoplasmic streaming and delayed cellularization. GLP-1 signaling in oocyte growth depends in part on the downstream function of the FBF-1/2 PUF RNA-binding proteins. Furthermore, abnormal oocyte growth in glp-1 mutants, but not the inappropriate differentiation of germline stem cells, requires the function of the cell death pathway. The data support a model in which GLP-1 function in MSP-dependent oocyte growth is separable from its role in the proliferation versus meiotic entry decision. Thus, two major germline signaling centers, distal GLP-1 activation and proximal MSP signaling, coordinate several spatially and temporally distinct processes by which germline stem cells differentiate into functional oocytes. |
| 巻・号 | 136(13) |
| ページ | 2223-34 |
| 公開日 | 2009-7-1 |
| DOI | 10.1242/dev.034603 |
| PII | 136/13/2223 |
| PMID | 19502484 |
| PMC | PMC2729341 |
| MeSH | Actins / metabolism Animals Caenorhabditis elegans / cytology Caenorhabditis elegans / genetics Caenorhabditis elegans / physiology* Caenorhabditis elegans Proteins / genetics Caenorhabditis elegans Proteins / metabolism* Cytoplasmic Streaming / physiology* Genes, Reporter Helminth Proteins / genetics Helminth Proteins / metabolism* Membrane Glycoproteins / genetics Membrane Glycoproteins / metabolism* Myosins / metabolism Oocytes / cytology Oocytes / physiology* Receptors, Notch / genetics Receptors, Notch / metabolism* Signal Transduction / physiology* |
| IF | 5.611 |
| 引用数 | 73 |
| WOS 分野 | DEVELOPMENTAL BIOLOGY |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | F1000Research |
| 各媒体での言及数の合計 | 1 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| 線虫 | tm1661 |