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The association between serum adhesion molecules and outcome in acute spontaneous intracerebral hemorrhage

Critical Care volume 15, Article number: R284 (2011) Cite this article

Abstract

Introduction

Serum concentrations of adhesion molecules may be connected to the pathogenesis of secondary brain injury after spontaneous intracerebral hemorrhage (ICH). This study posits the hypothesis that levels of adhesion molecules substantially increase after ICH and are decreased thereafter, and that they can predict treatment outcomes.

Methods

Two hundred and thirty-nine blood samples were collected from 60 consecutive patients admitted within 24 hours after onset of spontaneous ICH and 60 blood samples were collected from 60 volunteers. Additional samples were obtained on Days 4, 7, 10, and 14 after onset of ICH regardless of clinical deterioration.

Results

Upon discharge, the therapeutic outcomes of the 60 spontaneous ICH cases based on the modified Rankin Disability Scale (mMRS) showed that 17 had no disability while 8.3% developed delayed cerebral infarction (DCI). Statistical analysis of adhesion molecules between patient groups with good outcome (mMRS = 0 or 1) and poor outcome (mMRS ≥2) revealed significant differences in diabetes mellitus (P=0.049), hyperlipidemia (P=0.012), mentality change (P=0.043), ICH volume and intraventricular hemorrhage on admission (P=0.036 and 0.006, respectively), Glasgow Coma Scale (GCS) on admission (P≤0.001), neuro-surgical intervention (P=0.003), and sE-selectin and soluble intercellular cell adhesion-molecule-1 (sICAM-1) levels on admission (P=0.036 and 0.019, respectively). Multiple logistic regression analysis of these significant variables showed that GCS on admission, hyperlipidemia, and sICAM-1 (P=0.039, 0.042, and 0.022, respectively) were independently associated with outcome of acute spontaneous ICH.

Conclusion

Increased sICAM-1 and sE-selectin levels may imply poor therapeutic outcomes for the treatment of spontaneous ICH during hospitalization. These early inflammatory responses may cause whole-brain injury immediately after spontaneous ICH and offer a potential therapeutic target for such patients. The importance of these findings is that they offer a potential therapeutic target for patients with spontaneous ICH.

Introduction

Spontaneous intracerebral hemorrhage (ICH) is a fatal stroke subtype that accounts for 10% to 15% of all strokes. Its morbidity and mortality rates are among the highest, leaving individuals who survive with lasting disabilities [1–3]. Although ICH is a relatively common disease, the patho-physiologic mechanisms responsible for the outcome are poorly understood.

The inflammatory response in ICH is characterized by activation of local immune cells like microglial cells. Acute inflammation is observed within 4 hours of ICH in animal models [4] and this local inflammatory reaction is partly responsible for brain damage after injury. Specifically, blood-derived leukocytes are the primary sources of this damage, and infiltration of systemic immune cells results in enhanced disruption of the blood-brain barrier (BBB), leading to increased cerebral edema and subsequent deterioration of neuro-behavioral function [5–7].

The injured endothelium promotes inflammation via upregulation of adhesion molecules such as soluble intercellular cell adhesion molecule-1 (sICAM-1), soluble endothelial selectin (sE-selectin), and soluble platelet selectin (sP-selectin) that bind to circulating leukocytes and facilitate their migration into the cerebral ischemic region [8]. Experimental and clinical data demonstrate significant elevation of blood markers of endothelial cells, platelet activation, and inflammatory cell adhesion molecules in acute ischemic stroke [9–11]. Adhesion molecules sICAM-1 and soluble vascular cell adhesion molecule-1 (sVCAM-1) are pro-inflammatory parameters for the activation of the immune system [12]. Their physiologic role is the regulation of cell-to-cell contacts [13]. Recruitment of activated peripheral blood mononuclear cells across endothelial cells of the BBB seems to be an essential step in the initiation of brain inflammation [14]. This step of immune cell entry into the brain tissue is regulated by adhesion molecules and leads to a complex cascade of events [13, 15]. Moreover, adhesion molecules play a patho-physiologic role in cerebrovascular diseases [11]. One study has demonstrated that sICAM-1 and sVCAM-1 levels in cerebrospinal fluid (CSF) and serum of patients with acute subarachnoid hemorrhage are elevated compared with those of healthy controls [16]. Another study has found that highly elevated levels of sICAM-1 and sVCAM-1 in ventricular CSF are associated with lethal outcome after ICH [17]. This study investigated the relationship of serial inflammatory cell adhesion molecules and neuro-imaging findings and clinical outcome after acute spontaneous ICH.

Materials and methods

Patients

This study on the time course of serum adhesion molecule levels in patients with spontaneous ICH was a post hoc analysis of prospectively collected data and was conducted over a period of 18 months (August 2009 to January 2011). During this period, 60 adult patients (at least 20 years old) were admitted within 24 hours after onset of spontaneous ICH to Kaohsiung Chang Gung Memorial Hospital, which is a 2,482-bed acute-care teaching hospital in southern Taiwan and which provides both primary and tertiary referral care.

The diagnosis of spontaneous ICH was confirmed by patient history, brain computed tomography (CT) scans, or brain magnetic resonance imaging (MRI) or a combination thereof. Patients were excluded if they had (a) imminent death, (b) diffuse atherosclerotic changes on intra- and extra-cranial vessels with or without evidence of old cerebral infarct, (c) central nervous infection during hospitalization, or (d) major systemic disease like end-stage renal disease, liver cirrhosis, or congestive heart failure.

All of the patients or their representatives provided written informed consent. The study was approved by the ethics committee of the Chang Gung Memorial Hospital institutional review board. Patients were under continuous observation and monitored for Glasgow Coma Scale (GCS) score, electrocardiogram, blood pressure, pulse rate, temperature, fluid balance, and laboratory parameters at regular intervals. Outcome was assessed upon discharge by using the modified Rankin Disability Scale (mMRS) [18]. Good outcome was defined as an mMRS score of less than 1, whereas poor outcome was an mMRS score of at least 2 or death.

Data collection

All of the patients underwent brain CT scan soon after arrival at the emergency room as well as serial follow-up brain CT every week during hospitalization. Emergency brain CT scan or MRI was performed if there was clinical deterioration (for example, acute-onset focal neurologic deficits, seizures, status epilepticus, and progressively disturbed consciousness) and as post-neuro-surgical procedures. All of the patients received follow-up brain MRI to identify further cerebral lesions between days 10 and 14 after ICH or before discharge. Cerebral infarction was defined according to the criteria of the World Health Organization [19]. The principal investigator reviewed all available initial and follow-up CT scans and MRIs for the presence of ischemic lesions, and a second observer reviewed cases of equivocal findings. Neither one was aware of the laboratory results at the time of clinical and radiologic assessments.

Blood sampling and laboratory investigations

Two hundred thirty-nine blood samples from 60 patients were taken within 24 hours after onset of ICH. The additional samples were obtained on days 4, 7, 10, and 14 after onset of ICH regardless of clinical deterioration. Sixty samples from 60 volunteers were also obtained. Blood samples were collected by venipuncture into Vacutainer SST tubes (BD, Franklin Lakes, NJ, USA). Blood was allowed to clot at room temperature for a minimum of 30 minutes. The clot was then removed by centrifugation at 3,000 rpm for 10 minutes at 4°C. All serum samples were collected after centrifugation, isolated, and immediately stored at −80°C in multiple aliquots.

Serum sICAM-1, sVCAM-1, sE-selectin, soluble leukocyte selectin (sL-selectin), and sP-selectin levels were assessed with commercially available enzyme-linked immunosorbent assays (R&D Systems, Minneapolis, MN, USA). In the assay, standards, controls, and unknown samples were incubated in micro-titration wells coated with marked (that is, anti-ICAM-1, VCAM-1, P-selectin, E-selectin, and L-selectin) antibodies. After incubation and washing, the wells were treated with another anti-antigen detection antibody labeled with enzyme horseradish peroxidase.

After a second incubation and washing step, the wells were incubated with substrate tetramethylbenzidine. An acidic stopping solution was then added, and the degree of enzymatic turnover of the substrate was determined by a dual-wavelength absorbance measurement at 450 and 620 nm. Absorbance was directly proportional to the concentration of antigens present. A set of standard antigen was used to plot a standard curve of absorbance versus antigen concentration from which the antigen concentrations of the unknowns were calculated.

Data analysis

Data were expressed as mean ± standard derivation or as median (interquartile range, or IQR). Categorical variables were compared by using the chi-square test or Fisher exact test, where appropriate. Serum levels of adhesion molecules were logarithmically transformed to improve normality and compared by Student t test. Repeated measures of analysis of variance were used to compare adhesion molecules at five different time points (days 1, 4, 7, 10, and 14), and Scheffé's multiple comparison was used to analyze the intra-individual course of parameters over time and to compare parameters of two different groups (good and poor outcome).

Correlation analysis by Spearman ranking test was used to explore the relationship between age, GCS score on admission, and score on the mMRS upon discharge and variables like soluble intercellular adhesion molecule on admission.

Stepwise logistic regression was used to evaluate the relationship between significant variables and therapeutic outcomes, and adjustments were made for other potential confounding factors. Variables with zero cell count in a two-by-two table were eliminated from logistic analysis, and only variables with strong association with poor outcome (P <0.05) were included in the final model. Lastly, receiver operating characteristic (ROC) curves were generated for soluble adhesion molecule levels on admission. The areas under the ROC curves were calculated for each parameter and compared. All of the statistical analyses were conducted with the SAS software package, version 9.1 (2002; SAS Institute Inc., Cary, NC, USA).

Results

Baseline characteristics of the study patients

The baseline characteristics of the 60 adults with spontaneous ICH and 60 sex- and age-matched volunteers are listed in Table 1. The 60 patients with spontaneous ICH consisted of 42 men (age range of 36 to 75 years and mean age of 57.0 years) and 18 women (age range of 41 to 74 years and mean age of 59.9 years). Nineteen (31.7%) had lobar ICH, and 41 (68.3%) had deep ICH. Of the lobar hemorrhages, four were parietal, three frontal, five temporal, and seven occipital. The deep locations were the basal ganglia (26 patients) and thalamus (15 patients). Nineteen (31.7%) had intraventricular hemorrhage and nine (10%) had acute hydrocephalus at presentation. The median intracerebral hematoma was 10.0 (IQR of 5.7 to 25.8) at presentation. Treatments of ICH included extra-ventricular drainage in five, 10 craniotomy, and three craniectomy. Fifty-five (91.7%) had one or more underlying diseases: 55 had hypertension, 10 diabetes mellitus, two asthma, seven chronic obstructive pulmonary disease, five atrial fibrillation, four coronary artery disease, and 19 hyperlipidemia. Thirty-four were smokers.

Table 1 Demographic data of patients and volunteer subjects at admission
Full size table

In patients with spontaneous ICH, in comparison with the volunteer subjects, sICAM-1 and sVCAM-1 concentrations markedly increased at presentation (205.0 and 709.7 ng/mL, respectively) whereas sL-selectin markedly decreased (759.4 ng/mL) (Table 1). The differences between volunteers and spontaneous ICH patients were statistically significant (P = 0.021, P = 0.015, and P ≤0.000, respectively). The sP-selectin and sE-selectin concentrations did not show any statistically significant difference between the two groups at presentation: 85.1 versus 84.9 ng/mL (P = 0.841) and 39.4 versus 40.9 ng/mL (P = 0.600).

Effect of soluble intercellular adhesion molecule levels on spontaneous intracerebral hemorrhage

Correlation analysis was used to test the influence of soluble intercellular adhesion molecule levels at presentation on age, GCS score, and ICH volume at presentation. The statistical results (correlation coefficient, P value) revealed that age significantly correlated with levels of sICAM-1 (r = −0.422, P = 0.003), sL-selectin (r = −0.422, P = 0.003), and sE-selectin (r = −0.427, P = 0.002). GCS score significantly correlated with sVCAM-1 level (r = −0.304, P = 0.034). ICH volume did not have any significant correlation with these soluble intercellular adhesion molecules, whereas GCS score and ICH volume at presentation had a significant negative correlation with the molecules (r = −0.564, P ≤0.001).

Sixteen (27%) of 60 patients received neuro-surgical treatments: nine within 24 hours, four between 24 and 48 hours, and three within 4 days after ICH. When the effect of neuro-surgical intervention on sICAM-1 and sE-selectin levels in patients with ICH was compared, both had increased trends on days 1 and 4. However, only sICAM-1 level had a statistically significant difference on day 4 (P = 0.025).

Outcome and prognostic factors

Upon discharge, the therapeutic outcomes of 60 spontaneous ICH cases as determined by mMRS score showed that 17 had no disability, eight had slight disability, 10 had moderated disability, and 25 had severe disability, including five who became vegetative. There were no mortalities. Five (8.3%) of 60 patients had delayed cerebral infarction during the acute stage of spontaneous ICH: two in the basal ganglion and one each in the frontal, temporal, and parietal lobes. The median duration of delayed cerebral infarction was 4 days (IQR of 1.5 to 8.0 days).

The clinical features, neuro-imaging findings, and laboratory data between the two patient groups of good outcome (mMRS score of 0 or 1) and poor outcome (mMRS of at least 2) were compared, and statistical analysis revealed significant difference in diabetes mellitus (P = 0.049), hyperlipidemia (P = 0.012), mentality change (P = 0.043), ICH volume and intraventricular hemorrhage on admission (P = 0.036 and 0.006, respectively), GCS score on admission (P ≤0.001), neuro-surgical intervention (P = 0.003), and sE-selectin and sICAM-1 levels on admission (P = 0.036 and 0.019, respectively). The median lengths of hospitalization were 15 days (IQR of 13 to 23 days) and 11 days (IQR of 7 to 13 days) for those with poor and good outcome, respectively (P ≤0.001) (Table 2).

Table 2 Prognostic factors of patients with spontaneous intracerebral hemorrhage
Full size table

Time course of soluble intercellular adhesion molecule levels

Compared with volunteers, plasma sICAM-1 and sVCAM-1 levels were elevated significantly after onset of ICH and peaked on days 10 (sICAM-1) and 4 (sVCAM-1) and then slightly decreased thereafter (Figure 1a,b). Plasma sL-selectin levels decreased significantly after ICH onset and reached the lowest level on day 4 and then increased thereafter (Figure 1d). Plasma sP-selectin levels decreased after onset of ICH, then increased gradually thereafter, and had a significant difference on day 14 only (Figure 1c). With the volunteers, there was no significant difference in plasma sE-selectin levels, which increased after ICH onset, peaked on day 4, and decreased thereafter (Figure 1e).

Figure 1
figure 1

Serum levels of sICAM-1 (a), sVCAM-1 (b), sP-selectin (c), sL-selectin (d), and sE-selectin (e) on various days (days 1, 4, 7, 10, and 14) in patients with ICH and controls. *P < 0.05, **P < 0.01, ***P < 0.001, ICH patients versus controls. ICH, intracerebral hemorrhage; sE-selectin, soluble endothelial selectin; sICAM-1, soluble intercellular cell adhesion molecule-1; sL-selectin, soluble leukocyte selectin; sP-selectin, soluble platelet selectin; sVCAM-1, soluble vascular cell adhesion molecule-1.

Full size image

When the therapeutic outcomes in the 60 spontaneous ICH cases as determined by mMRS score were compared, the sICAM-1 and sE-selectin concentration levels increased significantly from days 1 to 4 in patients with poor outcome (Figure 2a,e). Otherwise, the levels of sVCAM-1, sP-selectin, and sL-selectin were not significantly different during the first 14 days (Figure 2b,c,d).

Figure 2
figure 2

Serum levels of sICAM-1 (a), sVCAM-1 (b), sP-selectin (c), sL-selectin (d), and sE-selectin (e) on various days (days 1, 4, 7, 10, and 14) in patients with intracerebral hemorrhage. *P < 0.05, good outcome versus poor outcome. sE-selectin, soluble endothelial selectin; sICAM-1, soluble intercellular cell adhesion molecule-1; sL-selectin, soluble leukocyte selectin; sP-selectin, soluble platelet selectin; sVCAM-1, soluble vascular cell adhesion molecule-1.

Full size image

Multiple logistic regression analysis of significant variables, including diabetes mellitus (P = 0.049), hyperlipidemia (P = 0.012), mentality change (P = 0.043), ICH volume and intraventricular hemorrhage on admission (P = 0.036 and 0.006, respectively), GCS score on admission (P ≤0.001), neuro-surgical intervention (P = 0.003), and time course of sE-selectin and sICAM-1, showed that GCS score on admission, hyperlipidemia, and sICAM-1 (P = 0.039, 0.042, and 0.022, respectively) were independently associated with outcome of acute spontaneous ICH. Furthermore, the ROC curves revealed that the cutoff point of sICAM-1 on admission was 194.61 ng/mL (sensitivity of 68.8%, specificity of 71.4%, area of 0.717, and 95% confidence interval of 0.553 to 0.880).

Discussion

The present study examines the corrections between outcome and endothelial cell activation markers following spontaneous ICH and produces the following major findings. First, sICAM-1 and sVCAM-1 concentrations markedly increased in patients with spontaneous ICH at presentation (205.0 and 709.7 ng/mL, respectively), whereas sL-selectin markedly decreased (759.4 ng/mL) (Table 1). Second, plasma concentrations of sICAM-1 and sVCAM-1 elevated significantly after ICH onset, peaked on day 10 (sICAM-1) and day 4 (sVCAM-1), and then slightly decreased thereafter (Figure 1a,b). Furthermore, plasma sL-selectin levels decreased significantly after onset of ICH, reached its lowest level on day 4, and then increased thereafter (Figure 1d). Third, when the therapeutic outcomes of the 60 spontaneous ICH cases as determined by mMRS score were compared, sICAM and sE-selectin concentration levels increased significantly from days 1 to 14 in patients with poor outcome (Figure 2a,e). Fourth, GCS score on admission, hyperlipidemia as the underlying disease, and sICAM-1 (P = 0.039, 0.042, and 0.022, respectively) were independently associated with outcome of acute spontaneous ICH.

Adhesion molecules

Several studies have shown that adhesion molecules play a patho-physiologic role in cerebrovascular diseases [11, 16, 17, 20]. One study has demonstrated that sICAM-1 and sVCAM-1 levels in CSF and sera of patients with acute subarachnoid hemorrhage are elevated compared with those of healthy controls [16]. Two studies by Kraus and colleagues [17, 20] have found that highly elevated levels of sICAM-1 and sVCAM-1 in ventricular CSF, but not in serum, are associated with lethal outcome after ICH. Only sICAM-1 and sVCAM-1 levels in CSF, not in serum, are significantly correlated with basal ganglia hemorrhage volume and edema volume. However, there is no significant correlation with outcome at day 8 or at 6 months later [20].

In the former study by Kraus and colleagues [17], patients were categorized into one of two groups (patients who survived and patients who died). In the former study by Kraus and colleagues [17],there were no normal subjects for comparison that may mask the true difference in adhesion molecules in different disease severities. Furthermore, the two studies have relatively small groups of patients (n = 10 and 11, respectively). The present study shows increased concentration levels of sICAM-1 and sVCAM-1 in patients with acute spontaneous ICH. This activation persists for at least 14 days after ICH onset and suggests that the activation of adhesion molecules, especially sICAM-1 and sVCAM-1, plays a patho-physiologic role in the acute phases after spontaneous ICH.

The inflammatory response in ICH is characterized by the activation of local immune cells such as microglial cells. This local inflammatory reaction is partly responsible for damages to the brain after injury. Mounting evidence also suggests that systemic immune cells, specifically blood-derived leukocytes, are the primary sources of this damage [4]. In focal ischemic stroke models, systemic immune cell recruitment is mediated in part by the increase in adhesion molecule expression along the endothelial cell walls [8]. As a result, these systemic immune cells propagate local immune response by releasing pro-inflammatory cytokines at the site of injury, increasing cerebral edema, and worsening neuro-behavioral function [5, 9, 10].

Previous studies on ICH indicate that brain edema increases progressively in the first 24 hours and remains elevated for several days because of an inflammatory response characterized by the infiltration of neutrophils and macrophages as well as the activation of microglia [6]. The cause of secondary brain injury and edema formation is uncertain. The results of the present study show that an inflammatory response occurs after ICH and that adhesion molecules, especially sICAM-1 and sE-selectin, may play an important role in the inflammatory response, contributing to secondary brain injury and worsened neuro-behavioral function.

Delayed cerebral infarction

Five (8.3%) of 60 patients in the present study had delayed cerebral infarction during hospitalization, and this incidence is similar to that of a previous report [21]. However, these adhesion molecules are not correlated with the occurrence of delayed cerebral infarction, and patients who had delayed cerebral infarction do not account for the outcome in this study. Several mechanisms are implicated in the development of cerebral infarctions following spontaneous ICH. One is the massive release of blood and blood breakdown products into the CSF and subsequent inflammatory changes in the smooth muscle of the large cerebral arteries as well as released vasoactive substances involving inflammatory host reactions [22–24]. As the disease progresses, inflammatory changes result in endothelial dysfunction with consequences that include loss of cerebrovascular autoregulation and increased permeability of the BBB. Decreased cerebral blood flow becomes apparent and leads to cerebral ischemia [25, 26]. The possible reasons that delayed cerebral infarction does not significantly correlate with adhesion molecules in the present study are that the conditions of the ICH patient population are mild at admission: median GCS score of 14.5 (IQR of 10.3 to 15.0) and median ICH volume of 10.0 mL (IQR of 5.7 to 25.8 mL). Therefore, the inflammatory condition in the patient population may be less severe and does not cause worse outcome.

Of the 60 patients enrolled in this study, 42 (70%) were mild, eight (13.3%) were moderate, and 10 (16.7%) were severe in their initial GCS score. The hematoma volume was relatively small: the median volume of intracerebral hematoma was 10.0 mL (IQR of 5.7 to 25.8 mL) at presentation. The small hematoma volume will cause less volume effect, and this may explain why the intracerebral hematoma volume is not an independent factor associated with the outcome.

In this study, underlying disease with hyperlipidemia is independently associated with outcome of acute spontaneous ICH. At the moment of acute spontaneous ICH, the patients were all being treated for hyperlipidemia with statin drugs. Previous studies reveal that pre-treatment with intense low-density lipoprotein cholesterol-reducing drugs improves the clinical outcome in patients with ischemic and hemorrhagic stroke [27–29]. Previous reports demonstrate an induction of apoptosis, inflammation, and excitotoxic cascades after ICH [30]. There is also increasing evidence that statins have anti-inflammatory and anti-thrombotic effects, aside from their cholesterol-lowering effect [31, 32].

In the patient population here, neuro-surgical intervention is significantly associated with poor outcome. It is reasonable to postulate that surgical intervention can affect the serum levels of various adhesion molecules. All of the neuro-surgical treatments were done within 4 days after ICH. However, only the level of sICAM-1 had a statistically significant difference on day 4 (P = 0.025) between patients with neuro-surgical intervention and those without it. Furthermore, when included in the multiple logistic regression analysis, neuro-surgical intervention is not an independent factor associated with outcome of acute spontaneous ICH. Thus, neuro-surgical intervention may affect the serum levels of various adhesion molecules but does not confound the major findings of the study.

This study has several limitations. First, patients who were deeply comatose or those with imminent death were excluded. There is uncertainty in assessing the expression of these adhesion molecules in critically ill and high-risk patients. Second, sICAM-1, sVCAM-1, sP-selectin, sL-selectin, and sE-selectin are only part of the endothelium-leukocyte-platelet adherent molecules expressed after cerebrovascular diseases. Therefore, increased levels of these markers may not necessarily be reflected in the actual patho-physiologic function. Third, serial changes of adhesion molecules may be influenced by the expression of platelet adhesion molecules (CD62P, CD63, and CD40L), platelet-leukocyte interaction, and several drugs (for example, statins and calcium channel blockers), which are commonly used in patients with ICH. Lastly, the case numbers are small and the follow-up period is short. Large-scale studies with longer follow-up periods to evaluate the association between clinical outcome and the expression of adhesion molecules are warranted.

Conclusions

An increase in sICAM-1 and sE-selectin levels implies a danger of poor therapeutic outcome for the treatment of spontaneous ICH during hospitalization. These early inflammatory responses may cause whole-brain injury immediately after spontaneous ICH. The importance of these findings is that they offer a potential therapeutic target for such patients. Further large-scale studies are needed to elucidate the relevance of serum concentrations of adhesion molecules and secondary brain injury after spontaneous ICH.

Key messages

  • Increased levels of soluble intercellular cell adhesion molecule-1 (sICAM-1) and soluble endothelial selectin (sE-selectin) imply a danger of poor therapeutic outcome for the treatment of acute spontaneous intracerebral hemorrhage (ICH).

  • Early inflammatory responses may cause whole-brain injury immediately after spontaneous ICH.

  • These findings are important because they offer a potential therapeutic target for patients with spontaneous ICH.

Abbreviations

BBB:

blood-brain barrier

CSF:

cerebrospinal fluid

CT:

computed tomography

GCS:

Glasgow Coma Scale

ICH:

intracerebral hemorrhage

IQR:

interquartile range

mMRS:

modified Rankin Disability Scale

MRI:

magnetic resonance imaging

ROC:

receiver operating characteristic

sE-selectin:

soluble endothelial selectin

sICAM-1:

soluble intercellular cell adhesion molecule-1

sL-selectin:

soluble leukocyte selectin

sP-selectin:

soluble platelet selectin

sVCAM-1:

soluble vascular cell adhesion molecule-1.

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Acknowledgements

This study was supported by grants from Chang Gung Memorial Hospital Research Project CMRPG880921. None of the authors has any commercial association, such as consultancies, stock ownership, or other equity interests or patent-licensing arrangements. The authors thank Yi-Fang Chiang for her excellent enzyme-linked immunosorbent assay measurement technique.

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Authors and Affiliations

  1. Department of Neurosurgery, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123, Ta-Pei Road, Niao Sung district, Kaohsiung, 83304, Taiwan

    Hung-Chen Wang, Yu-Jun Lin, Cheng-Shyuan Rau & Tsung-Han Lee

  2. Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, 100, Shi-Chuan 1st Road, Kaohsiung, 807, Taiwan

    Hung-Chen Wang

  3. Department of Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123, Ta-Pei Road, Niao Sung district, Kaohsiung, 83304, Taiwan

    Wei-Che Lin

  4. Department of Biological Science, National Sun Yat-Sen University, 70 Lienhai Road, Kaohsiung, 80424, Taiwan

    Yu-Jun Lin, Ben-Chung Cheng & Cheng-Hsien Lu

  5. Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123, Ta-Pei Road, Niao Sung district, Kaohsiung, 83304, Taiwan

    Wen-Neng Chang, Nai-Wen Tsai & Cheng-Hsien Lu

  6. Department of Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123, Ta-Pei Road, Niao Sung district, Kaohsiung, 83304, Taiwan

    Ben-Chung Cheng

  7. Department of Emergency Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, 123, Ta-Pei Road, Niao Sung district, Kaohsiung, 83304, Taiwan

    Chia-Te Kung

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  1. Hung-Chen Wang
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  2. Wei-Che Lin
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  3. Yu-Jun Lin
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  8. Ben-Chung Cheng
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  9. Chia-Te Kung
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  10. Cheng-Hsien Lu
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Correspondence to Cheng-Hsien Lu.

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Competing interests

The authors declare that they have no competing interests.

Authors' contributions

H-CW and Y-JL participated in the design of the study and drafted the manuscript. C-SR, T-HL, B-CC, and C-TK participated in the sequence alignment and clinical evaluation of patients. W-CL interpreted the neuro-imaging studies. W-NC and N-WT performed the statistical analysis. C-HL conceived the study, participated in its design and coordination, and helped draft the manuscript. All authors read and approved the final manuscript.

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Wang, HC., Lin, WC., Lin, YJ. et al. The association between serum adhesion molecules and outcome in acute spontaneous intracerebral hemorrhage. Crit Care 15, R284 (2011). https://doi.org/10.1186/cc10568

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  • DOI: https://doi.org/10.1186/cc10568

Keywords

Critical Care

ISSN: 1364-8535