Journal List > Korean J Lab Med > v.27(2) > 1011446

Seo, Kim, Lee, and Cho: Clinical Usefulness of Plasma Interleukin-6 and Interleukin-10 in Disseminated Intravascular Coagulation

Abstract

Background

Disseminated intravascular coagulation (DIC) is a syndrome characterized by a systemic activation of coagulation leading to the intravascular deposition of fibrin and the simultaneous consumption of coagulation factors and platelets. Inflammatory cytokines can activate the coagulation system. This study investigated the diagnostic and prognostic usefulness of the plasma level of interleukin-6 (IL-6) and interleukin-10 (IL-10) for predicting DIC.

Methods

The study populations were 15 healthy controls and 81 patients who were clinically suspected of having DIC and were requested to perform DIC battery tests. The presence of overt DIC was defined by the International Society on Thrombosis and Haemostasis Subcommittee cumulative score of 5 or above. The 28 day mortality was used to assess the prognostic outcome. The plasma levels of the cytokines were measured by ELISA.

Results

The plasma levels of IL-6 and IL-10 in patients (N=81) were higher than those of control (N=15). IL-6 and IL-10 levels of overt DIC group (N=31) were 3 times and 1.5 times higher than those, respectively, of non-overt DIC group (N=50). In infection group (N=48), IL-6 and IL-10 levels of overt DIC group (N=18) were 5 times and 3 times higher than those, respectively, of non-overt DIC group (N=30). The diagnostic efficiency of IL-6 (optimal cut off >40.4 pg/mL) and IL-10 (>9.7 pg/mL) for the diagnosis of overt DIC were 67% and 69%, respectively, which were similar to that of D-dimer. Plasma levels of IL-6 and IL-10 were also higher in non-survivors than in survivors. The patients with higher levels of IL-6 and IL-10 showed a poorer prognosis.

Conclusions

The proinflammatory cytokine, IL-6 and anti-inflammatory cytokine, IL-10 were useful for the diagnosis of overt DIC and the prediction of its prognosis. These results also showed the evidence of a close interaction between coagulation and inflammation.

References

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Fig. 1.
Survival curves for patients subdivided by plasma concentrations of IL-6 (A) and IL-10 (B).
kjlm-27-83f1.tif
Table 1.
Characteristics of the study population
  Control (N=15) Patients (N=81) Patients
Overt DIC (N=31) Non-overt DIC (N=50)
Age (yr)* 38 (29–47) 55 (35–68) 50 (35–67) 58 (36–69)
Sex of male, N (%) 9 (60) 47 (58) 21 (68) 26 (52)
WBC (×109/L) 6.07 (4.77–7.41) 7.39 (3.57–13.54) 5.24 (2.39–13.48) 9.3 (5.82–13.65)
Hb (g/L)*,§ 140 (136–150) 97 (86–114) 90 (83–104) 98 (92–117)
Platelet (× 10 9 /L)*, 275 (229–306) 82 (37–172) 35 (20–69) 132 (83–272)
Positive FDP, N (%)   78 (96) 30 (97) 48 (96)
D-dimer (μg/mL)   3.54 (2.39–8.41) 4.59 (2.70–14.16) 3.33 (2.10–5.45)
Fibrinogen (mg/dL)   364 (217–629) 198 (174–295) 541 (364–668)
PT (sec),, 13.4 (13.2–14.0) 16.1 (14.0–19.9) 20.3 (18.2–22.5) 14.4 (13.0–15.8)
aPTT (sec),, 38.0 (34.1–40.5) 47.1 (38.8–55.7) 52.1 (43.9–60.2) 42.7 (37.8–54.4)
CRP (mg/dL)   5.73 (1.66–14.55) 4.86 (1.10–11.44) 6.36 (1.83–15.91)
IL-6 (pg/mL)*, 1.00 (1.00–3.48) 52.10 (12.04–179.25) 105.50 (50.48–379.6) 31.83 (6.42–109.80)
IL-10 (pg/mL)*, 2.70 (2.29–11.80) 10.52 (6.16–23.36) 13.16 (10.25–46.35) 8.35 (4.88–20.81)

Data are expressed as median (interquartile range).

* Control vs. Patients, P<0.01;

Control vs. Patients, P<0.05;

Overt DIC vs. non-overt DIC, P<0.01;

§ Overt DIC vs. non-overt DIC, P<0.05;

Data were missing in 5 controls;

Data were missing in 19 patients (13 overt DIC & 6 non-overt DIC).

Abbreviations: DIC, disseminated intravascular coagulation; FDP, fibrin degradation products; PT, prothrombin time; aPTT, activated partial thromboplastin time; CRP, C-reactive protein.

Table 2.
Comparison of plasma IL-6 and IL-10 levels in patients with or without infection
  Infection
Non-infection
Overt DIC (N=18) Non-overt DIC (N=30) Overt DIC (N=13) Non-overt DIC (N=20)
IL-6 (pg/mL) 206.63 (66.50–387.54)* 45.20 (22.95–112.55) 51.98 (9.00–183.00) 11.15 (1.00–93.12)
IL-10 (pg/mL) 24.95 (10.13–66.40)‘ 8.59 (5.02–22.26) 12.58 (9.83–17.02)‘ 7.78 (3.95–11.67)

Data are expressed as median (interquartile range).

* P<0.01;

P<0.05.

Abbreviation: DIC, disseminated intravascular coagulation.

Table 3.
Diagnostic performance of various parameters for the diagnosis of overt DIC (N=81)
  AUC (95% CI) Optimal cut off Sensitivity (%) Specificity (%) Efficiency (%)
IL-6 (pg/mL) 0.72 (0.61–0.82) >40.4 77.4 60.0 67
IL-10 (pg/mL) 0.71 (0.60–0.81) >9.7 80.6 62.0 69
Platelet (×109/L) 0.88 (0.79–0.94) <79 93.5 78.0 84
CRP (mg/dL) 0.61 (0.47–0.73) <14.2 88.9 38.6 48
PT (sec) 0.93 (0.86–0.98) >17.2 93.5 92.0 93
aPTT (sec) 0.70 (0.59–0.80) >42.9 87.1 52.0 67
D-dimer (μg/mL) 0.67 (0.56–0.77) >3.88 61.3 70.0 68
Fibrinogen (mg/dL) 0.88 (0.78–0.94) <358 90.3 78.0 83

Abbreviations: DIC, disseminated intravascular coagulation; AUC, area under the ROC curve; ROC, receiver operating characteristic; CI, confidence interval; CRP, C-reactive protein; PT, prothrombin time; aPTT, activated partial thromboplastin time.

Table 4.
Comparison of plasma IL-6 and IL-10 levels between survivors and non-survivors
  Overt DIC
Non-overt DIC
Survivors (N=18) Non-survivors (N=10) Survivors (N=38) Non-survivors (N=10)
IL-6 (pg/mL) 64.40 (20.87–119.41) 319.46 (152.13–391.40) 22.15 (4.75–67.25)* 146.70 (57.50–288.05)
IL-10 (pg/mL) 11.31 (9.01–23.72) 33.76 (14.50–70.91) 8.06 (4.54–16.94) 21.13 (5.58–33.72)

Data are expressed as median (interquartile range).

* P<0.01;

P<0.05.

Abbreviation: DIC, disseminated intravascular coagulation.

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