嗅神経細胞の繊毛のケージド化合物のフラッシュフォトリシス
Summary
ケージド化合物の光分解は、様々な生理活性化合物の濃度の急激かつローカライズされた増加の生産を可能にする。ここでは、解離マウス嗅神経細胞における嗅覚情報伝達の研究のためのケージドcAMPまたはケージのCaの光分解を組み合わせたパッチクランプ記録を取得する方法を示します。
Abstract
ケージド化合物の光分解は、様々な生理活性化合物1の濃度の急激かつローカライズされた増加の生産を可能にする。ケージド化合物は紫外光のフラッシュと壊れる可能性の化学ケージで生理的に非アクティブに分子である。ここでは、解離マウス嗅神経細胞における嗅覚情報伝達の研究のためのケージド化合物の光分解を組み合わせたパッチクランプ記録を取得する方法を示します。嗅覚情報伝達のプロセス（図1）の受容体に結合する嗅覚は、環状ヌクレオチド依存性（CNG）チャネル2を開くcAMPの増加につながる嗅神経細胞の繊毛で行われます。 CNGチャネルを通じて、CAエントリは、Ca活性化塩素チャネルを活性化する。我々は、マウス嗅上皮3、どのようにケージキャンプ4の光分解またはCa 5をケージでCNGチャネルまたはCa活性化塩素チャネルを活性化するから神経細胞を分離する方法を示しています</>のSup。我々は、パッチクランプ記録をホールセル電圧クランプの設定8-11の電流を測定するために取られている間、おりから出すのcAMPやCaに毛様体部分に紫外線が点滅を適用するにはフラッシュランプ6,7を使用してください。
Protocol
1. Instrumentation To measure the response of olfactory sensory neurons to photolysis of caged compounds we use a flash lamp in combination with a typical patch-clamp recording system including: a patch-clamp amplifier, a recording electrode and a reference electrode connected to the head-stage of a patch-clamp amplifier, a digitizer, a computer, software for data acquisition, micro-manipulators, an epifluorescence microscope, a perfusion system, an anti-vibration table and a Faraday cage (Figure 2). <li…
Discussion
パッチクランプ記録と組み合わせケージド化合物のフラッシュの光分解は、生理活性分子の濃度の内側と外側の細胞の両方の急激かつ局所ジャンプを取得するために便利なテクニックです。ケージcompounds1のいくつかの種類が合成され、そしてこの技術は、アクティブまたは利用可能なケージド化合物11のいくつかの光分解によって変調することができるイオンチャネルを発現する培?…
Divulgaciones
The authors have nothing to disclose.
Materials
| Equipment | Company | Catalogue number | Comments |
|---|---|---|---|
| Adapter module flash lamp to microscope | Rapp OptoElectronic | FlashCube 70 | |
| Air table | TMC | MICRO-g 63-534 | |
| Digitizer | Axon Instruments | Digidata 1322A | |
| Data Acquisition Software | Axon Instruments | pClamp 8 | |
| Data Analysis Software | WaveMetrics | Igor | |
| Mirror for adapter module | Rapp OptoElectronic | M70/100 | |
| Electrode holder | Axon Instruments | 1-HL-U | |
| Faraday’s cage | Custom made | ||
| Filter cube | Olympus | U-MWU | Excitation filter removed |
| Flash lamp | Rapp OptoElectronic | JML-C2 | |
| Forceps Dumont #55 | World Precision Instruments | 14099 | |
| Glass capillaries | World Precision Instruments | PG10165-4 | |
| Glass bottom dish | World Precision Instruments | FD35-100 | |
| Illuminator | Olympus | Highlight 3100 | |
| Inverted microscope | Olympus | IX70 | |
| Micromanipulators | Luigs & Neumann | SM I | |
| Micropipette Puller | Narishige | PP-830 | |
| Monitor | HesaVision | MTB-01 | |
| Neutral density filters | Omega Optical | varies | |
| Objective 100X | Zeiss | Fluar 440285 | Either Zeiss or Olympus |
| Objective 100X | Olympus | UPLFLN 100XOI2 | Either Zeiss or Olympus |
| Optical UV shortpass filter | Rapp OptoElectronic | SP400 | |
| Patch-clamp amplifier | Axon Instruments | Axopatch 200B | |
| Photo Diode Assembly | Rapp OptoElectronic | PDA | |
| Quartz light guide | Rapp OptoElectronic | varies | We use 600 μm diameter |
| Silver wire | World Precision Instruments | AGT1025 | |
| Silver ground pellet | Warner instruments | 64-1309 | |
| Xenon arc lamp | Rapp OptoElectronic | XBL-JML |
| Reagent | Company | Catalogue number |
|---|---|---|
| BCMCM-caged cAMP | BioLog | B016 |
| Bovine serum albumin (BSA) | Sigma | A8806 |
| CaCl2 standard solution 0.1 M | Fluka | 21059 |
| Caged Ca: DMNP-EDTA | Invitrogen | D6814 |
| Cysteine | Sigma | C9768 |
| Concanavalin A type V (ConA) | Sigma | C7275 |
| CsCl | Sigma | C4036 |
| DMSO | Sigma | D8418 |
| DNAse I | Sigma | D4527 |
| EDTA | Sigma | E9884 |
| EGTA | Sigma | E4378 |
| Glucose | Sigma | G5767 |
| HEPES | Sigma | H3375 |
| KCl | Sigma | P3911 |
| KOH | Sigma | P1767 |
| Leupeptin | Sigma | L0649 |
| MgCl2 | Fluka | 63020 |
| Papain | Sigma | P3125 |
| Poly-L-lysine | Sigma | P1274 |
| NaCl | Sigma | S9888 |
| NaOH | Sigma | S5881 |
| NaPyruvate | Sigma | P2256 |
Referencias
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Tags
Flash PhotolysisCaged CompoundsOlfactory Sensory NeuronsPatch-clamp RecordingsPhotolysis Of Caged CompoundsOlfactory TransductionDissociated Mouse Olfactory Sensory NeuronsCiliaOdorant BindingReceptorsCAMPCyclic Nucleotide-gated (CNG) ChannelsCa EntryCa-activated Cl ChannelsMouse Olfactory EpitheliumFlash LampUltraviolet FlashesWhole-cell Voltage-clamp Configuration
Citar este artículo
Boccaccio, A., Sagheddu, C., Menini, A. Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons. J. Vis. Exp. (55), e3195, doi:10.3791/3195 (2011).