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| Name | Class |
|---|---|
| Canadian Institutes of Health Research (CIHR) | OTHER_GOV |
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Chronic obstructive pulmonary disease (COPD) is a leading cause of morbidity and mortality worldwide. Its prevalence is in progression and COPD is expected to become the fourth leading cause of death by 2030. COPD is characterized by periods of stability interspersed with acute infectious/inflammatory flare-ups, also called acute exacerbations, during which patients deteriorate, sometimes to the point of requiring immediate medical assistance. Although most patients eventually recover, repeated episodes of exacerbations may accelerate COPD progression. Exacerbations may further compromise the integrity of limb muscles by promoting further loss in muscle mass and strength.
The overall objective of this substudy is to elucidate how an acute COPD exacerbation may affect limb muscles.
Focusing our attention during exacerbations, a period of aggravated systemic inflammation, should be more rewarding in terms of understanding the link between inflammation burst and muscle disease in COPD. We have recently acquired experimental data supporting a role for the ubiquitin proteasome pathway in the worsening of limb muscle structure and function during an acute exacerbation, providing a solid framework for this investigation. The overall objective of this proposal is to substantiate these preliminary findings and elucidate how systemic inflammation during acute COPD exacerbation may affect limb muscles. Ultimately, our research could open new therapeutic avenues to minimize the systemic consequences of an acute exacerbation.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| COPD exacerbation | No specific intervention for this study |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| No specific intervention for this study | Other | No specific intervention for this study |
|
| Measure | Description | Time Frame |
|---|---|---|
| Increased levels of ubiquitin proteasome pathway proteins in patients experiencing an acute exacerbation of COPD | Our view is that targeting exacerbation is likely to unravel important mechanisms linking systemic inflammatory processes to downstream consequences on remote organs such as limb muscles. Inflammatory burst observed during exacerbation may be associated with upregulation of ubiquitin proteasome pathway (Atrogin-1, MuRF-1, Nedd4, ubiquitin C, poly-Ub), the main proteolytic pathway in this tissue, and thus with the occurrence of atrophying process. | during an acute exacerbation of COPD (first 24-48 hours, before treatment) |
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Inclusion Criteria:
Exclusion Criteria:
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Male and female who are experiencing an acute exacerbation of their COPD.
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Annie Dubé, PhD | Contact | 418-656-8711 | 2673 | annie.dube@criucpq.ulaval.ca |
| Name | Affiliation | Role |
|---|---|---|
| François Maltais, MD, PhD | Institut universitaire de cardiologie et de pneumologie de Québec, University Laval | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Centre de recherche de l'Institut de cardiologie et de pneumologie de Québec | Recruiting | Québec | Quebec | G1V 4G5 | Canada |
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| ID | Term |
|---|---|
| D029424 | Pulmonary Disease, Chronic Obstructive |
| ID | Term |
|---|---|
| D008173 | Lung Diseases, Obstructive |
| D008171 | Lung Diseases |
| D012140 | Respiratory Tract Diseases |
| D002908 | Chronic Disease |
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Blood sample and muscle biopsy of vastus lateralis (quadriceps)
| D020969 |
| Disease Attributes |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |