Atrophy, Sepsis
Conditions
Brief summary
The current project was designed to examine dynamic changes in muscle wasting during sepsis. Researchers will focus the mitochondrial dysfunction of muscle cells and investigate the role of HO-1 in it. Researchers interested in identifying factors involved in the pathology of muscle wasting during sepsis.
Detailed description
Rapid muscle atrophy or muscle wasting occured to septic patients.Sepsis induced muscle wasting has become a severe, frequent, and persistent complication among critically ill patients. Multiple factors including ubiquitin-proteasome system, proinflammatory cytokines and oxidative stress contribute muscle proteolysis. It is known that heme oxygenase-1 (HO-1) possesses a variety of functions like anti-inflammatory, antioxidative and anti-apoptosis effects. In order to investigate the mechanisms under the condition, researchers are going to examine the role of HO-1 in muscle atrophy during sepsis.
Interventions
PROCEDUREtherapy according to SSC guidelines and muscle biopsy
Septic patients will be treated according to the international guidelines for management of severe sepsis and septic shock 2012. Skeletal muscle biopsies, blotted free from blood, are frozen within 30 seconds in liquid nitrogen, and stored in liquid nitrogen until processing.150-300 mg muscle (wet weight) was routinely obtained , which is more than sufficient for the analyses proposed, with some muscle remaining for any additional validation assays that may arise during the course of the research. Muscle will be processed either for isolation of mRNA/microRNA or protein
PROCEDUREstandard surgery for femoral fracture and muscle biopsy
Patients with femoral fracture will under standard surgery for fracture fixation. Percutaneous needle muscle biopsies will be performed. Skeletal muscle biopsies, blotted free from blood, are frozen within 30 seconds in liquid nitrogen, and stored in liquid nitrogen until processing.150-300 mg muscle (wet weight) was routinely obtained , which is more than sufficient for the analyses proposed, with some muscle remaining for any additional validation assays that may arise during the course of the research. Muscle will be processed either for isolation of mRNA/microRNA or protein
Sponsors
Changhai Hospital
Study design
Observational model
CASE_CONTROL
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* sepsis, severe sepsis, septic shock * clinical reason for fixation surgery of femoral fractures
Exclusion criteria
* no informed consent * medical history of myopathy * unintended weight loss before surgery or ICU admission * chronic use of corticosteroids
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| HO-1 mRNA and protein expression, mitochondria function of musculus vastus lateralis | 3 days after diagnosis |
Secondary
| Measure | Time frame |
|---|---|
| length of ICU stay | 60 days |
| length of mechanical ventilation | 60 days |
| muscle myosin content | 3 days after diagnosis |
Countries
China
Outcome results
None listed