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Multicenter Study
. 2010;14(3):R96.
doi: 10.1186/cc9031. Epub 2010 May 26.

Early alterations of the innate and adaptive immune statuses in sepsis according to the type of underlying infection

Affiliations
Multicenter Study

Early alterations of the innate and adaptive immune statuses in sepsis according to the type of underlying infection

Charalambos Gogos et al. Crit Care. 2010.

Abstract

Introduction: Although major changes of the immune system have been described in sepsis, it has never been studied whether these may differ in relation to the type of underlying infection or not. This was studied for the first time.

Methods: The statuses of the innate and adaptive immune systems were prospectively compared in 505 patients. Whole blood was sampled within less than 24 hours of advent of sepsis; white blood cells were stained with monoclonal antibodies and analyzed though a flow cytometer.

Results: Expression of HLA-DR was significantly decreased among patients with severe sepsis/shock due to acute pyelonephritis and intraabdominal infections compared with sepsis. The rate of apoptosis of natural killer (NK) cells differed significantly among patients with severe sepsis/shock due to ventilator-associated pneumonia (VAP) and hospital-acquired pneumonia (HAP) compared with sepsis. The rate of apoptosis of NKT cells differed significantly among patients with severe sepsis/shock due to acute pyelonephritis, primary bacteremia and VAP/HAP compared with sepsis. Regarding adaptive immunity, absolute counts of CD4-lymphocytes were significantly decreased among patients with severe sepsis/shock due to community-acquired pneumonia (CAP) and intraabdominal infections compared with sepsis. Absolute counts of B-lymphocytes were significantly decreased among patients with severe sepsis/shock due to CAP compared with sepsis.

Conclusions: Major differences of the early statuses of the innate and adaptive immune systems exist between sepsis and severe sepsis/shock in relation to the underlying type of infection. These results may have a major impact on therapeutics.

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Figures

Figure 1
Figure 1
Expression of HLA-DR on monocytes and rate of apoptosis of monocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the underlying infection. Patients are divided according to sepsis severity. Double asterisks denote statistically significant differences within the same underlying infection between sepsis and severe sepsis/shock after adjustment for multiple comparisons. CAP: community-acquired pneumonia; HAP: hospital-acquired pneumonia; SE: standard error; VAP: ventilator-associated pneumonia.
Figure 2
Figure 2
Absolute counts and rates of apoptosis of NK cells and of NKT lymphocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the underlying infection. Patients are divided according to sepsis severity. Single asterisk denotes a statistically significant difference between underlying infections after adjustment for multiple comparisons. Double asterisks denote statistically significant differences within the same underlying infection between sepsis and severe sepsis/shock after adjustment for multiple comparisons. CAP: community-acquired pneumonia; HAP: hospital-acquired pneumonia; NK: natural killer; SE: standard error; VAP: ventilator-associated pneumonia.
Figure 3
Figure 3
Absolute counts and rates of apoptosis of CD4- and of CD8-lymphocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the underlying infection. Patients are divided according to sepsis severity. Single asterisk denotes statistically a significant difference between underlying infections after adjustment for multiple comparisons. Double asterisks denote statistically significant differences within the same underlying infection between sepsis and severe sepsis/shock after adjustment for multiple comparisons. CAP: community-acquired pneumonia; HAP: hospital-acquired pneumonia; SE: standard error; VAP: ventilator-associated pneumonia.
Figure 4
Figure 4
Absolute counts of B-lymphocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the underlying infection. Patients are divided according to sepsis severity. Double asterisks denote statistically significant differences within the same underlying infection between sepsis and severe sepsis/shock after adjustment for multiple comparisons. CAP: community-acquired pneumonia; HAP: hospital-acquired pneumonia; SE: standard error; VAP: ventilator-associated pneumonia.
Figure 5
Figure 5
Expression of HLA-DR on monocytes and rate of apoptosis of monocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the implicated pathogens. Patients are divided according to sepsis severity. Single asterisk denotes a statistically significant difference between underlying infections after adjustment for multiple comparisons. Double asterisks denote statistically significant differences within the same underlying infection between sepsis and severe sepsis/shock after adjustment for multiple comparisons. SE: standard error.
Figure 6
Figure 6
Absolute counts and rates of apoptosis of NK cells and of NKT lymphocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the implicated pathogens. Patients are divided according to sepsis severity. NK: natural killer; SE: standard error.
Figure 7
Figure 7
Absolute counts and rates of apoptosis of CD4- and of CD8-lymphocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the implicated pathogens. Patients are divided according to sepsis severity. SE: standard error.
Figure 8
Figure 8
Absolute counts of B-lymphocytes within the first 24 hours of diagnosis among patients with sepsis in relation to the implicated pathogens. Patients are divided according to sepsis severity. SE: standard error.

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