論文 - 詳細
| RRC ID | 59522 |
|---|---|
| 著者 | Kozlova AA, Lotfi M, Okkema PG. |
| タイトル | Cross Talk with the GAR-3 Receptor Contributes to Feeding Defects in Caenorhabditis elegans eat-2 Mutants. |
| ジャーナル | Genetics |
| Abstract |
Precise signaling at the neuromuscular junction (NMJ) is essential for proper muscle contraction. In the Caenorhabditis elegans pharynx, acetylcholine (ACh) released from the MC and M4 motor neurons stimulates two different types of contractions in adjacent muscle cells, termed pumping and isthmus peristalsis. MC stimulates rapid pumping through the nicotinic ACh receptor EAT-2, which is tightly localized at the MC NMJ, and eat-2 mutants exhibit a slow pump rate. Surprisingly, we found that eat-2 mutants also hyperstimulated peristaltic contractions, and that they were characterized by increased and prolonged Ca2+ transients in the isthmus muscles. This hyperstimulation depends on cross talk with the GAR-3 muscarinic ACh receptor as gar-3 mutation specifically suppressed the prolonged contraction and increased Ca2+ observed in eat-2 mutant peristalses. Similar GAR-3-dependent hyperstimulation was also observed in mutants lacking the ace-3 acetylcholinesterase, and we suggest that NMJ defects in eat-2 and ace-3 mutants result in ACh stimulation of extrasynaptic GAR-3 receptors in isthmus muscles. gar-3 mutation also suppressed slow larval growth and prolonged life span phenotypes that result from dietary restriction in eat-2 mutants, indicating that cross talk with the GAR-3 receptor has a long-term impact on feeding behavior and eat-2 mutant phenotypes. |
| 巻・号 | 212(1) |
| ページ | 231-243 |
| 公開日 | 2019-5-1 |
| DOI | 10.1534/genetics.119.302053 |
| PII | genetics.119.302053 |
| PMID | 30898771 |
| PMC | PMC6499512 |
| MeSH | Animals Animals, Genetically Modified Caenorhabditis elegans / metabolism* Caenorhabditis elegans / physiology Caenorhabditis elegans Proteins / metabolism* Caenorhabditis elegans Proteins / physiology Motor Neurons Muscle Contraction* Muscles / metabolism* Muscles / physiology Neuromuscular Junction / metabolism* Pharynx / metabolism Pharynx / physiology Receptors, Muscarinic / metabolism* Receptors, Muscarinic / physiology Receptors, Nicotinic / metabolism* Receptors, Nicotinic / physiology Signal Transduction |
| IF | 3.564 |
| 引用数 | 0 |
| 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 | X(Twitter) |
| 各媒体での言及数の合計 | 3 |
| 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 | tm863 |