ICAP
AC-26 - NuMA-like
Previous Nomenclature Mitotic Spindle Apparatus, MSA-1, centrophilin
Description Nuclear speckled staining with spindle fibers
Antigen Association NuMA (nuclear mitotic apparatus protein 1) [1]. Specific immunoassays for autoantibodies to NuMA are currently not commercially available
Clinical Relevance
First level information
About Clinical Relevance & List of Abbreviations
Found very infrequently in a routine diagnostic setting [2].
Approximately one-half of the patients with the AC-26 pattern have clinical features of a systemic autoimmune rheumatic disease; the AC-26 pattern is also observed in patients with organ-specific autoimmune diseases and less frequently in non-autoimmune conditions, especially when in low titer [2-7].
First level information references
Second level information
None
Second level information references
1.
Compton DA, Szilak I, Cleveland DW. Primary structure of NuMA, an intranuclear protein that defines a novel pathway for segregation of proteins at mitosis. J Cell Biol. 1992;116:1395-408.
2.
Mozo L, Gutierrez C, Gomez J. Antibodies to mitotic spindle apparatus: clinical significance of NuMA and HsEg5 autoantibodies. J Clin Immunol. 2008;28:285-90.
3.
Szalat R, Ghillani-Dalbin P, Jallouli M, Amoura Z, Musset L, Cacoub P, Sene D. Anti-NuMA1 and anti-NuMA2 (anti-HsEg5) antibodies: Clinical and immunological features: A propos of 40 new cases and review of the literature. Autoimmun Rev. 2010;9:652-6.
4.
Grypiotis P, Ruffatti A, Tonello M, Winzler C, Radu C, Zampieri S, Favaro M, Calligaro A, et al. [Clinical significance of fluoroscopic patterns specific for the mitotic spindle in patients with rheumatic diseases]. Reumatismo. 2002;54:232-7.
5.
Price CM, McCarty GA, Pettijohn DE. NuMA protein is a human autoantigen. Arthritis Rheum. 1984;27:774-9.
6.
Bonaci-Nikolic B, Andrejevic S, Bukilica M, Urosevic I, Nikolic M. Autoantibodies to mitotic apparatus: association with other autoantibodies and their clinical significance. J Clin Immunol. 2006;26:438-46.
7.
Arcani R, Bertin D, Bardin N, Mazodier K, Jean R, Suchon P, Venton G, Daumas A, et al. Anti-NuMA antibodies: clinical associations and significance in patients with primary Sjogren's syndrome or systemic lupus erythematosus. Rheumatology (Oxford). 2021;60:4074-84.
Last updated in August 2025
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Online since 19 May 2015