Fire-vejs Olfactometer Assay: En metode til at vurdere Lugt-Cued Svar i Drosophila
Published: April 30, 2023
Abstract
Kilde: Lin, C.C., et al. Olfactory Behaviors analyseret af Computer Tracking af Drosophila i en fire-kvadrant Olfactometer. J. Vis. Exp. (2016).
Frugtfluer har et komplekst olfaktorisk system, kan diskriminere hundreder af lugtstoffer og bruge deres lugtesans til direkte adfærdsmæssige beslutninger. Denne video beskriver de fire-vejs olfactometer assay, en metode til at studere olfaktoriske adfærdsmæssige reaktioner i fluer. Det fremhævede protokolklip viser, hvordan man håndterer testfluer, og hvad der er kritiske trin, mens du udfører analysen.
Protocol
Denne protokol er et uddrag fra Lin et al., Olfactory Behaviors analyseret af Computer Tracking Of Drosophila i et firekvadrant Olfactometer, J. Vis. Exp. (2016). 1. Adfærdsmæssige reaktioner på attraktive og frastødende lugtstoffer Tænd for temperaturregulatoren, og sæt den til 25 °C. Tilslut lugtkamrene (kontrol og test lugtstoffer) ved at indsætte slangen til udløbet af lugtkammeret og til push-to-connect-monteringen på adfærdsboksen…
Representative Results
Figur 1: Eksempeldata genereret ved hjælp af en olfaktorisk analyse med fire felter. (A)Skematisk over arenaen med fire felter. (B) Neutrale reaktioner observeres, når alle fire kvadranter kun indeholder tør luftperfusion. (C) Attraction svar på en 6,25% fortynding af æble cider eddike perfunderes fra venstre øvre kvadrant. (D) Frastødning adfærd …
Materials
| Air delivery system | (Quantity needed) | ||
| Tubing and connectors | |||
| Thermoplastic NPT(F) Manifolds | Cole-Parmer, IL, USA | R-31522-31 | 1 |
| Hex reducing nipple (1/4MNPT->1/8MNPT) | McMaster-Carr, IL, USA | 5232T314 | 1 |
| Tubing (ID:1/8) | McMaster-Carr, IL, USA | 5108K43 | 50 Ft |
| Tubing (ID:1/16) | McMaster-Carr, IL, USA | 52355K41 | 100 Ft |
| Barbed tube fittings | McMaster-Carr, IL, USA | 5117K71 | 1 pack |
| Push-to-connect tube fittings | McMaster-Carr, IL, USA | 5779K102 | 4 |
| Barbed Tube Fittings (1/4MNPT->1/8BF) | McMaster-Carr, IL, USA | 5463K439 | 1 pack (10) |
| Barbed Tube Fittings (1/8MNPT->1/8BF) | McMaster-Carr, IL, USA | 5463K438 | 2 pack (10) |
| Barbed Tube Fittings (1/8MNPT->1/16BF) | McMaster-Carr, IL, USA | 5463K4 | 2 pack (10) |
| Barbed Tube Fittings (1/4MNPT->1/4BF) | McMaster-Carr, IL, USA | 5670K84 | 1 |
| Hex head plug | McMaster-Carr, IL, USA | 48335K152 | 1 |
| Air pressure regulator, air filter and flowmeters | (Quantity needed) | ||
| Labatory gas drying unit | W A HAMMOND DRIERITE CO LTD, OH, USA | Model: L68-NP-303; stock #26840 | 1 |
| Multitube frames for 150 mm flowtubes | Cole-Parmer, IL, USA | R03215-30 | 1 |
| Multitube frames for 150 mm flowtubes | Cole-Parmer, IL, USA | R03215-76 | 1 |
| 150 mm flowtubes | Cole-Parmer, IL, USA | R-03217-15 | 9 |
| Valve Cartridge | Cole-Parmer, IL, USA | R-03218-72 | 9 |
| Precision Air regulator | McMaster-Carr, IL, USA | 6162K13 | 1 |
| Soleniod valves | Automate Scientific, Berkeley, CA | 02-10i | 4 |
| Solenoid valve controller | ValveLink 8.2, Automate Scientific, Berkeley, CA | 18-Jan | 1 |
| Electronic flow meter | Honeywell | AWM3100V | 1 |
| DAQ (NI USB-6009, National Instruments) and a | National Instruments | NI USB-6009 | 1 |
| Power supply | Extech Instruments | 382200 | 1 |
| Odor chambers | |||
| Polypropylene Wide Mouth jar 2 oz; 60 ml | Nalgene | 562118-0002 | At least 5 are required per experiment, but a separate chamber is required for each dillution of each odorant. Available at Container Store, part #635114) |
| Glass odor chamber, 0.25 oz | Sunburst Bottle | LB4B | At least 5 are required per experiment |
| "In" valve for odor chamber | Smart Products, Inc., CA, USA | 214224PB-0011S000-4074 | 1 of these parts is used per odor chamber but they need to be replaced frequently |
| "Out" valve for odor chamber | Smart Products, Inc., CA, USA | 224214PB-0011S000-4074 | 1 of these parts is used per odor chamber but they need to be replaced frequently |
| O ring | RT Dygert International, MN, USA | AS568-029 Buna-N O-R | 1 pack (100) |
| Fly arena, camera and behavior boxes | (Quantity needed) | ||
| Behavior and camera box material | Interstate plastics, CA, USA | ABS black extruded (https://www.interstateplastics.com/Abs-Black-Extruded-Sheet-ABSBE~~ST.php) | 1803 sq inch |
| Teflon for fly arena and odor chamber inserts, 3/8" thick, 12" x 12" | McMaster-Carr, IL, USA | 8545K27 | 1 |
| Glass plates, 1/8" Thick, 9" x 9" | McMaster-Carr, IL, USA | 8476K191 | 2 |
| Dual action thermoelectric controller | WAtronix Inc, CA, USA | DA12V-K-0 | 1 |
| IR LED array | Advanced Illumination, Rochester, VT, USA | AL4554-88024, PS24-TL | 2 LED arrays and one power supply |
| Air conditioner Unit | Melcor Store | MAA280T-12 | 1 |
| Imaging system | (Quantity needed) | ||
| Cosmicar/Pentax C21211TH (12.5 mm F/1.4) C-mount Lens | B AND H PHOTO AND ELECTRONICS CORP, NY, USA | PEC21211 KP | 1 |
| CCXC-12P05N Interconnect Cable | B AND H PHOTO AND ELECTRONICS CORP, NY, USA | SOCCXC12P05N | 1 |
| DC-700 Camera Adapter | B AND H PHOTO AND ELECTRONICS CORP, NY, USA | SODC700 | 1 |
| B+W 40,5 093 IR filter | B AND H PHOTO AND ELECTRONICS CORP, NY, USA | 65-072442 | 1 |
| TiFFEN 40.5 mm Circular polarizer | Amazon | 1 | |
| IR Videocamera | Industrial Vision Source, FL, USA | Sony XC-EI50 (SY-XC-E150) | 1 |
| USB video converter | The Imagingsource, NC, USA | DFG/USB2-It | 1 |
| iFlySpy2 (fly tracking software) | Julian Brown, Stanford, Calfornia: julianrbrown@gmail.com | iFlySpy2 | 1 |
| IC Capture software | The Imagingsource, NC, USA | (http://www.theimagingsource.com/) | |
| Miscellaneous | (Quantity needed) | ||
| Dremel rotary tool | Dremel, Racine, WI, USA | Dremel 8000-03 | 1 |
| Diamond-coated drill bits for glass cutting | Available from various suppliers; MSC industrial Supply Co, Melville, NY | 90606328 | 1 |
Citer Cet Article
Four-Way Olfactometer Assay: A Method to Assess Odorant-Cued Responses in Drosophila. J. Vis. Exp. (Pending Publication), e20140, doi: (2023).