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2017 ; 7
(1
): 15606
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Proteomic study revealed cellular assembly and lipid metabolism dysregulation in
sepsis secondary to community-acquired pneumonia
#MMPMID29142235
Sharma NK
; Tashima AK
; Brunialti MKC
; Ferreira ER
; Torquato RJS
; Mortara RA
; Machado FR
; Assuncao M
; Rigato O
; Salomao R
Sci Rep
2017[Nov]; 7
(1
): 15606
PMID29142235
show ga
Sepsis is a life-threatening disorder characterized by organ dysfunction and a
major cause of mortality worldwide. The major challenge in studying sepsis is its
diversity in such factors as age, source of infection and etiology. Recently,
genomic and proteomic approaches have improved our understanding of its complex
pathogenesis. In the present study, we use quantitative proteomics to evaluate
the host proteome response in septic patients secondary to community-acquired
pneumonia (CAP). Samples obtained at admission and after 7 days of follow-up were
analyzed according to the outcomes of septic patients. The patients' proteome
profiles were compared with age- and gender-matched healthy volunteers.
Bioinformatic analyses of differentially expressed proteins showed alteration in
the cytoskeleton, cellular assembly, movement, lipid metabolism and immune
responses in septic patients. Actin and gelsolin changes were assessed in
mononuclear cells using immunofluorescence, and a higher expression of gelsolin
and depletion of actin were observed in survivor patients. Regarding lipid
metabolism, changes in cholesterol, HDL and apolipoproteins were confirmed using
enzymatic colorimetric methods in plasma. Transcriptomic studies revealed a
massive change in gene expression in sepsis. Our proteomic results stressed
important changes in cellular structure and metabolism, which are possible
targets for future interventions of sepsis.