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Table 3 Autoantibodies profile in various series

From: An unprecedented COPA gene mutation in two patients in the same family: comparative clinical analysis of newly reported patients with other known COPA gene mutations

Group

ANCA n (%)

PR3 n (%)

MPO n(%)

RF n(%)

Anti CCP n(%)

ANA n(%)

ENA n(%)

Treatment experience

Watkin LB. et al., 2015 [3] (n = 21)

15 (71)

NA

NA

9 (43)

NA

14 (67).

0/0

(100%)

Symptomatic partial response to immunosuppression 21 (100)

Jensson BO.]et al. 2017 [4] (n = 3)

2 (67)

NA

NA

3 (100)

1 (33%)

3 (100) Titers up to 1:1280

NA

Partial response to immunosuppression

Responded to MMF, Hydroxychloroquine, and steroids.

Brennan MA. et al.2017 [8] (n = 1)

NA

NA

NA

NA

NA

1/1 (100%)

1/1 (100%)

Pulse and oral steroids, Monthly-six doses of Cyclophosphamide, MTX, Rituximab. Currently on combination therapy: MMF, Hydroxychloroquine, steroids.

Comorbidities: GERD, Cystic Fibrosis, SLE. Developed MAS.

Volpi S. et.al. 2018 [7] (n = 1)

0/1 (0%)

NA

NA

1/1 (100%)

NA

Yes

(but not at the presentation)

NA

Partial response to immunosuppression

Tsui JL. et.al. 2018 [2] (n = 14)

9/12 (64%)

3/9 (33%)

2/9 (22%)

10/14 (71%)

3/14 (21%)

12/14 (86%)

titers 1:40 to 1:320

0/14 (100%)

Partial response to immunosuppression Most patients with diffuse alveolar hemorrhage (DAH) responded to pulse methylprednisolone and monthly-six doses of cyclophosphamide, but few subsequently needed rituximab. Poor response to Methotrexate, AZA, and Etanercept. Most patients are doing better on low dose prednisone+ MMF+ Hydroxychloroquine.

2/14 (14%) needed a bilateral lung transplant.

Patwardhan A. et.al. (n = 2)

2/2 (100%)

Index case: Negative Father of the index case: NA

Index case: Negative Father of the index case: NA

0/2 (0%)

Index case: Negative Father of the index case: NA

2/2 (100%) Titers up to 1:1280

Index case: Negative Father of the index case: Negative

IC had a partial response to immunosuppression (no response to Methotrexate, AZA). Good response to pulse steroids followed by

MMF+ low dose oral steroids.

C2-was treated with repeated pulse steroids, oral high and low dose steroids and now with adalimumab and methotrexate for arthritis.

  1. NB: c-ANCA Cytoplasmic antineutrophil cytoplasmic antibodies. p-ANCA Perinuclear antineutrophil cytoplasmic antibodies. PR3 antibody against proteinase 3 of neutrophils and monocytes. MPO Antibody against myeloperoxidase enzyme expressed in neutrophils. RF Rheumatoid factor. Anti CCP Anti-Cyclic Citrullinated Peptide. ANA Antinuclear Antibodies. ENA Extractable Nuclear Antigen antibodies panel. NA Not available, MMF Mycophenolate Mofetil. AZA Azathioprine. Tsui JL.et al. group has common patients with Levi B Watkin et.al group but had more detailed information on pulmonary symptoms