20180718: ICC CNTN1 an NF155 IgG AND IgM in CMT patients

Objectives: To test CMT patients for IgG/IgM positivity towards NF155 and CNTN1.

Samples:

For NF155 IgM:

CODERESULTS
9-
10-
11-
12-
13-
48-
49-
50-
51-
52-
53NO REALIZADO
54-
55-
56-
57-

For NF155 IgG: 

CODERESULTS
23+
34-
49-
50-
51-
52-
53-
54-
55-
56-
57-
CTRL ++
CTRL --

For CNTN1 IgM:

CODERESULTS
12-
24-
49-
50-
51-
52-
53-
54-
55-
56-
57-
CTRL ++
CTRL --

For CNTN1 IgG: 

CODERESULTS
9-
10-
11-
12-
13-
14-
15-
16-
17-
18UNCERTAIN (REPEAT)
19-
20-
21-
22-
23-
24-
25-
26-
27-
28-
29-
30-
31-
32-
33-
34-
48-
49-
50-
51-
52-
53-
54-
55-
56-
57-
CTRL --

NF155 ICC:

  • HEKs 293 Cells Transfection: 2018.01.16
  • Blocking solution: 5% goat serum in PBS.
  • Patient’s sera diluted 1/40 for IgM and 1/100 for IgG with 5% goat serum in PBS.
  • Primary antibody: AF3235 diluted 1/1000.
  • Secondary antibodies:
    • For IgG: GAC 488 (1/1000) + GAH 594 IgG (1/1000)
    • For IgM: GAC 488 (1/1000) + GAH 594 IgM (1/1000)
  • Vectashield mounting medium.

CNTN1 ICC:

  • HEKs 293 Cells Transfection: 30.05.2018
  • Blocking solution: Rabbit serum diluted 1/40 in PBS.
  • Patient’s sera diluted 1/100 for IgG with rabbit serum 1/40.
  • Primary antibody: AF904 diluted 1/1000.
  • Secondary antibodies: RAG 488 + RAH 594 IgM (1/1000)
  • Vectashield mounting medium.

Results: The sample 23 is positive for IgG towards NF155. However, it was positive for IgG towards NF140 too and we suspect than the staining can be inespecific. We can make a ICC with no transfected NEK cells to see if the staining is inespecific. The rest of the samples were negative for IgM or IgG towards NF155.

We have a problem with the primary antibody AF904 and we can’t co-localize a sample that was uncertain: sample 18 for IgM; so we are going to repeat it. There is an inespecific staining in sample 24 for IgG. The rest of the samples were negative.

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