Detection of anti-nuclear antibodies from filter paper blood clots using indirect immunoenzyme technique: preliminary experience and results.
Article
in English
| IMSEAR
| ID: sea-95627
ABSTRACT
BACKGROUND:
The facilities to detect antinuclear antibodies (ANA) patterns in patients with systemic rheumatic diseases/connective tissue disorders (CTD) using indirect immunofluorescence (IIF) technique (the gold standard) are sparse; the technique is technically difficult and expensive. A simpler technique, such as the indirect immunoenzyme (IIE) which uses light microscopy, ought to be evaluated for widespread use in our setting.OBJECTIVE:
To study the feasibility and relevance of IIE in demonstrating ANA patterns, both from serum and filter paper blood clots (FPBC), in patients with CTD.METHODS:
In this pilot study, ANA were detected from sera and FPBC of 21 patients with proven CTD using IIE; paired FPBC and serum samples were simultaneously collected in 10 patients. All samples, coded randomly, were tested by IIE and IIF, along with positive and negative controls.RESULTS:
Using IIE, the results of the ANA patterns obtained from FPBC eluates and sera were similar; homogenous (SLE-6, PSS-1, RA-4), speckled (SLE-8, PSS-2, Overlap CTD-1) and centromere (PSS-1). Four SLE patients showed mixed pattern; sensitivity of IIE for lupus was hundred percent. On comparing the results with the serum IIF, the Kappa statistic of agreement was 1 (perfect) and 0.4 (fair) for FPBC-IIF and FPBC-IIE respectively; the results matched between serum IIF and FPBC-IIE in 8 of the 10 paired samples tested.CONCLUSIONS:
IIE can demonstrate ANA both from sera and FPBC. This pilot study besides demonstrating positive trends for further probe also creates an awareness for such a feasible technique. However a larger sample size would be required to carry out its evaluation as an alternative to IIF and as a screening technique.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Arthritis, Rheumatoid
/
Female
/
Humans
/
Male
/
Blood Specimen Collection
/
Child
/
Pilot Projects
/
Feasibility Studies
/
Mass Screening
/
Antibodies, Antinuclear
Type of study:
Diagnostic study
/
Evaluation studies
/
Prognostic study
/
Screening study
Country/Region as subject:
Asia
Language:
English
Year:
2000
Type:
Article
Similar
MEDLINE
...
LILACS
LIS