Journal of Peking University (Health Sciences) ›› 2024, Vol. 56 ›› Issue (6): 1036-1040. doi: 10.19723/j.issn.1671-167X.2024.06.014

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Clinical significance of antiphospholipid antibodies in Behcet disease with thrombosis

Yukai LI1, Hongyan WANG1, Liang LUO1,2, Yun LI1, Chun LI1,*()   

  1. 1. Department of Rheumatology and Immunology, Peking University People' s Hospital, Beijing 100044, China
    2. Department of Traditional Chinese Medicine, the People' s Hospital of Yubei District of Chongqing, Chongqing 401120, China
  • Received:2024-07-31 Online:2024-12-18 Published:2024-12-18
  • Contact: Chun LI E-mail:13811190098@163.com
  • Supported by:
    the Beijing Natural Science Foundation(7192211)

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Abstract:

Objective: To investigate the distribution and clinical significance of antiphospholipid antibody (aPL) in patients with Behcet disease (BD). Methods: A total of 222 BD patients admitted to the Department of Rheumatology and Immunology in Peking University People' s Hospital from February 2008 to July 2024 were selected retrospectively. General data of the patients including age and gender were collec-ted. Clinical manifestations (including oral ulcers, genital ulcers, and thrombosis) and laboratory indexes (including aPL, human leukocyte antigen-B51, and anti-endothelial cell antibody) were collec-ted. The recurrence of thrombosis in the BD patients with thrombosis was followed up. Chi-square test was used to compare the clinical symptoms and laboratory indicators between aPL positive group and aPL negative group. Log-rank test was used to compare the recurrence rates of the aPL positive group and the aPL negative group, and P correction was performed by Two-stage method. Finally, Graphpad prism was used for plotting. Results: The prevalence of single aPL, double aPL and triple aPL positivity in the BD patients were 22.1%, 0.5% and 1.4%, respectively. The positive rates of anti-cardiolipin antibody, anti-β2 glycoprotein Ⅰ antibody and lupus anticoagulant (LAC) were 10.4%, 1.8% and 13.1%, respectively. The incidence of thrombosis in the aPL positive group was significantly higher than that in the aPL negative group (44.9% vs. 16.9%, P < 0.001). The erythrocyte sedimentation rate [(20.78±4.91) mm/h vs. (15.85±4.29) mm/h, P=0.005], C-reactive protein [(12.97±5.17) mg/L vs. (7.49± 4.22) mg/L, P=0.010] and IgM [(1.55±0.95) g/L vs. (1.12±0.72) g/L, P < 0.001] in the aPL positive group were significantly higher than those in the aPL negative group. LAC positivity was an independent risk factor for thrombosis in the BD patients (OR=8.51, 95%CI: 2.71-26.72, P < 0.001). The recurrence rate of the aPL positive group was higher than that of the aPL negative group, but there was no statistical difference (69.23% vs. 52.17%, P=0.932). Conclusion: Positive LAC and aneurysm are independent risk factors for thrombosis in BD patients. At the same time, positive antiphospholipid antibody can also significantly increase the risk of thrombosis in BD patients, which has important significance for guiding the treatment of BD.

Key words: Antiphospholipid antibody, Behcet disease, Thrombosis, Recurrence, Risk factors

CLC Number: 

  • R593.2

Table 1

Baseline characteristics of patients with BD"

Items BD patients (n=222)
Age/years 41.5±13.1
Gender (female) 112 (50.5)
Thrombosis
    Venous thrombosis 36 (16.2)
    Arterial thrombosis 27 (12.2)
    Both venous and arterial thrombosis 11 (5.0)
aCL (+) 23 (10.4)
aβ2GPI (+) 4 (1.8)
LAC (+) 29 (13.1)
Single aPL positivity 49 (22.1)
Double aPL positivity 1 (0.5)
Triple aPL positivity 3 (1.4)

Table 2

Comparison of clinical manifestations between BD patients with aPL positive and aPL negative"

Items aPL (+) (n=49), n (%) aPL (-) (n=173), n (%) P value
Oral ulcers 46 (93.9) 167 (97.1) 0.288
Vulvar ulcers 21 (42.9) 106 (61.6) 0.019
Articular involvement 5 (10.2) 45 (26.0) 0.019
Neurologic involvement 6 (12.2) 24 (13.9) 0.769
Skin manifestations 13 (26.5) 62 (35.8) 0.224
Ocular involvement 9 (18.4) 47 (27.2) 0.211
Positive pathergy test 5 (16.1) 32 (30.8) 0.109
Thrombosis 22 (44.9) 29 (16.9) < 0.001
Aneurysms 7 (14.3) 23 (13.4) 0.869
Gastrointestinal involvement 3 (6.1) 37 (21.4) 0.014

Table 3

Comparison of laboratory indexes between BD patients with aPL positive and aPL negative"

Items aPL (+)(n=49), ${\bar x}$±s aPL (-)(n=173), ${\bar x}$±s P value
IgA/(g/L) 3.11±1.30 2.79±1.25 0.335
IgG/(g/L) 13.66±1.96 11.84±1.82 0.140
IgM/(g/L) 1.55±0.95 1.12±0.72 < 0.001
CRP/(mg/L) 12.97±5.17 7.49±4.22 0.010
ESR/(mm/h) 20.78±4.91 15.85±4.29 0.005
PT/s 13.75±1.89 13.01±3.24 0.931
Fib/(mg/dL) 308.26±9.76 328.72±13.99 0.538
APTT/s 33.65±2.26 32.65±5.10 0.653
FDP/(mg/L) 1.72±1.16 2.13±1.63 0.085
D-dimer/(μg/L) 182.91±14.64 256.19±21.36 0.082

Figure 1

Comparison of recurrence thrombosis between BD patients with aPL positive and aPL negative BD, Behcet disease; aPL, antiphospholipid antibody."

Table 4

Logistic regression of risk factors of thrombosis in patients with BD"

Items Univariate Multivariate
B SE Z P OR (95%CI) B SE Z P OR (95%CI)
Age/years 0.00 0.01 -0.29 0.770 1.00 (0.97-1.02)
ESR/(mm/h) 0.00 0.01 -0.17 0.868 1.00 (0.98-1.02)
PT/s 0.20 0.08 2.45 0.014 1.22 (1.04-1.43) 0.08 0.09 0.90 0.368 1.09 (0.90-1.31)
Fib/(mg/dL) 0.00 0.00 1.34 0.182 1.00 (1.00-1.00)
APTT/s 0.00 0.01 -0.17 0.868 1.00 (0.98-1.02)
IgA/(g/L) 0.01 0.12 -0.12 0.906 0.99 (0.78-1.25)
IgG/(g/L) 0.05 0.05 0.96 0.337 1.05 (0.95-1.17)
IgM/(g/L) 0.11 0.29 0.39 0.698 1.12 (0.63-1.99)
aβ2GPI (+) 0.25 0.65 -0.39 0.700 0.78 (0.22-2.79)
aCL (+) 2.31 1.24 1.86 0.062 10.06 (0.89-114.09)
LAC (+) 2.20 0.49 4.48 < 0.001 9.06 (3.45-23.76) 2.14 0.58 3.67 < 0.001 8.51 (2.71-26.72)
HLA-B51 (+) 0.59 0.46 1.29 0.196 1.81 (0.74-4.45)
AECA (+) 0.14 0.45 -0.31 0.760 0.87 (0.36-2.11)
Aneurysm 1.05 0.46 2.29 0.022 2.85 (1.16-7.00) 0.99 0.50 1.97 0.049 2.70 (1.01-7.24)
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