Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Observational Study
. 2019 Jun 28;6(5):e583.
doi: 10.1212/NXI.0000000000000583. eCollection 2019 Sep.

Collaborative International Research in Clinical and Longitudinal Experience Study in NMOSD

Collaborators, Affiliations
Observational Study

Collaborative International Research in Clinical and Longitudinal Experience Study in NMOSD

Lawrence J Cook et al. Neurol Neuroimmunol Neuroinflamm. .

Abstract

Objective: To develop a resource of systematically collected, longitudinal clinical data and biospecimens for assisting in the investigation into neuromyelitis optica spectrum disorder (NMOSD) epidemiology, pathogenesis, and treatment.

Methods: To illustrate its research-enabling purpose, epidemiologic patterns and disease phenotypes were assessed among enrolled subjects, including age at disease onset, annualized relapse rate (ARR), and time between the first and second attacks.

Results: As of December 2017, the Collaborative International Research in Clinical and Longitudinal Experience Study (CIRCLES) had enrolled more than 1,000 participants, of whom 77.5% of the NMOSD cases and 71.7% of the controls continue in active follow-up. Consanguineous relatives of patients with NMOSD represented 43.6% of the control cohort. Of the 599 active cases with complete data, 84% were female, and 76% were anti-AQP4 seropositive. The majority were white/Caucasian (52.6%), whereas blacks/African Americans accounted for 23.5%, Hispanics/Latinos 12.4%, and Asians accounted for 9.0%. The median age at disease onset was 38.4 years, with a median ARR of 0.5. Seropositive cases were older at disease onset, more likely to be black/African American or Hispanic/Latino, and more likely to be female.

Conclusions: Collectively, the CIRCLES experience to date demonstrates this study to be a useful and readily accessible resource to facilitate accelerating solutions for patients with NMOSD.

PubMed Disclaimer

Figures

Figure 1
Figure 1. Geographic location of CIRCLES clinical sites
Figure 2
Figure 2. Age at onset by serostatus and gender

References

    1. Akaishi T, Nakashima I, Sato DK, Takahashi T, Fujihara K. Neuromyelitis optica spectrum disorders. Neuroimaging Clin N Am 2017;27:251–265. - PubMed
    1. Marignier R, Cobo Calvo A, Vukusic S. Neuromyelitis optica and neuromyelitis optica spectrum disorders. Curr Opin Neurol 2017;30:208–215. - PubMed
    1. Weinshenker BG, Wingerchuk DM. Neuromyelitis spectrum disorders. Mayo Clin Proc 2017;92:663–679. - PubMed
    1. Whittam D, Wilson M, Hamid S, Keir G, Bhojak M, Jacob A. What's new in neuromyelitis optica? A short review for the clinical neurologist. J Neurol 2017;264:2330–2344. - PubMed
    1. Flanagan EP, Cabre P, Weinshenker BG, et al. . Epidemiology of aquaporin-4 autoimmunity and neuromyelitis optica spectrum. Ann Neurol 2016;79:775–783. - PMC - PubMed

Publication types