Samples:
- 20002
- 20001
- Holand 19202
- CIDP 1
- CIDP 2
- CIDP 4
- CIDP 7
- CIDP 8
- MRVM Titration (5ug)
- MRVM Titration (1ug)
MATERIALS:
- ELISA plates NUNC ref: 442404 Thermoscientific
- ELISA plate ref. 1581
- Coating buffer: sodium carbonate (pH 9.6)
- Recombinant Human Caspr1 His-tag Protein ( 2418-CR R&d Systems)
- RAH-HRP IgG secondary antibody DAKO (P0214)
- TMB solution (BioLegend)
- Non-fat dry milk
- H2SO4
- PBS-Tween 0.1%
PROCEDURE:
- Coat ELISA plate with Caspr1 protein (5ug/ml or 1ug/ml for titration MRVM sample to compare with 5ug/ml) in carbonate/bicarbonate buffer (pH 9.6) and incubate O/N at 4ºC rocking.
- The day after, wash plate 3xPBS-Tween 0.1%
- Block with milk 5% in PBS-Tween for 1 hour, 200uL per well).
- Add patients sera diluted 1/100 (200uL/well)
- **Dilutions for titration (MRVM): Make serial dilutions 1:3 of the samples in a ELISA plate ref. 1581 (8 wells). In the first well, add 200uL of the sample (diluted at 1/100), in the other wells add 140uL of milk 5% in PBS-Tween and 70uL of the previous well (serial dilutions). Add the dilutions in the blocked ELISA plate
- Incubate 1h at RT.
- Wash 3xPBS-Tween 0.1%
- Add secondary antibody RAH-HRP IgG 1/2000 in milk 5% in PBS-Tween 0.1% and incubate 1h at RT.
- Wash 3xPBS-Tween
- Add TMB solution 10′
- Stop reaction with H2SO4
- Lecture at 450-620 nm.
RESULTS:
20002 and 20001 were postive.
seroengative CIDP samples were negative
MRVM titers: 1/8100 (1/2700 CNTN1 1ug/ml)
ELISA CNTN1 y prueba titualción Caspr1.30.01.20
