In Vivo Single-Fiber Recording of Sciatic Nerve C-Fibers in Rats

Protocollo

All procedures involving animal models have been reviewed by the local institutional animal care committee and the JoVE veterinary review board.

1. Animals

1. Divide 24 Sprague-Dawley rats (4-8 weeks old) into two groups. Produce complete Freund's adjuvant (CFA) model by intraplantar injection of 100 μL of CFA in one group of 14 rats and another group of 10 rats by treatment with saline.
   NOTE: All of the animals were acquired from the Animal Center of the Fourth Military Medical University. Adult male and female Sprague-Dawley rats (150-200 g) were used for all procedures, and rats ....

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Materiali

Name	Company	Catalog Number	Comments
Instruments and software used in single fiber recording
Amplifier	Nihon kohden	MEZ-8201	Amplification of the electrophysiological signals
Bioelectric amplifier monitor	ShangHai JiaLong Teaching instrument factory	SZF-1	Monitor firing process via sound which is transformed from physiological discharge signal
Data acquisition and analysis system	CED	Spike-2	Software for data acquisition and analysis
Electrode manipulator	Narishige	SM-21	Contro the movement of the electrode as required
Hairspring tweezers	A.Dumont	5#	Separate the single fiber
Isolator	Nihon kohden	SS-220J
Memory oscilloscope	Nihon kohden	VC-9	Display recorded discharge during
experiment
Stereomicroscope	ZEISS	SV-11	Have clear observation when separate the local tissue and single fiber
Stimulator	Nihon kohden	SEZ-7203	Delivery of the electrical stimuli
Von Frey Hair	Stoelting accompany		Delivery of the mechanical stimuli
Water bath	Scientz biotechnology Co., Ltd.	SC-15	Heating paroline to maintain at 37oC
Origin	Origin lab	Origin 8	Software for drawing picture
Other instruments
Electronic balance	Sartorius	BS 124S	Weighing reagent
pH Modulator	Denver Instrument	UB7	Adjust pH to 7.4
Solutions/perfusion/chemicals
Calcium chloride	Sigma-Aldrich	C5670	Extracellular solution
Chloralose	Shanghai Meryer Chemical Technology Co., Ltd.	M07752	Mixed solution for Anesthesia
D (+) Glucose	Sigma-Aldrich	G7528	Extracellular solution
Liquid Paraffin	TianJin HongYan Reagent Co., Ltd.		Maintain fiber wetting
Magnesium sulfate	Sigma-Aldrich	M7506	Extracellular solution
Potassium chloride	Sigma-Aldrich	P3911	Extracellular solution
Protease	Sigma-Aldrich	62H0351	Enzyme used for clearing the surface of DRG
Sodium bicarbonate	Sigma-Aldrich	S5671	Extracellular solution
Sodium chloride	Sigma-Aldrich	S5886	Extracellular solution
Sodium phosphate monobasic	Sigma-Aldrich	S0751	Extracellular solution
Sucrose	Sigma-Aldrich	S0389	Extracellular solution
Urethane	Sigma-Aldrich	U2500	Mixed solution for Anesthesia