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Erythropoietin deficiency and anaemia in multiple system atrophy
A S Winkler1, J Marsden, M Parton
1Regional Movement Disorders, and Dystonia Unit, University Department of Clinical Neurosciences, King's College Hospital, London, United Kingdom.
Abstract:
Serum erythropoietin (EPO) levels are partially controlled by the sympathetic outflow to the kidney. We have studied whether patients with multiple system atrophy (MSA), known to be associated with dysautonomia, are EPO-deficient. Eighteen MSA patients were studied along with 32 idiopathic Parkinson's disease (PD) patients, 23 controls with iron-deficiency anaemia, and 18 healthy individuals. Serum creatinine was normal in all groups. Mean haemoglobin (Hb) concentration in MSA patients was 13.7 +/- 1.7 g/dL. Four MSA patients had unexplained anaemia (minimum Hb: 10.5 g/dL) and abnormal autonomic function tests including significant postural hypotension, whereas none of the PD patients was anaemic. Serum EPO levels were suppressed in relation to anaemia in MSA patients compared to elevated EPO levels in iron-deficiency anaemia patients (difference of regression lines P < 0.001), indicating EPO deficiency in the anaemic MSA patients. Serum EPO levels in PD patients were within normal range. A subset of MSA patients has anaemia and postural hypotension, which may be associated with EPO deficiency. This may have therapeutic implications.
Insights
Patients with multiple system atrophy (MSA) and anemia may have erythropoietin (EPO) deficiency, unlike Parkinson's disease patients. This finding suggests potential new treatments for MSA-related anemia.
Area of Science:
- Nephrology
- Neurology
- Endocrinology
Background:
- Serum erythropoietin (EPO) production is influenced by renal sympathetic nerve activity.
- Multiple system atrophy (MSA) is a neurodegenerative disorder characterized by autonomic dysfunction (dysautonomia).
- Dysautonomia in MSA can affect various bodily functions, potentially including hormonal regulation.
Purpose of the Study:
- To investigate whether patients with multiple system atrophy (MSA) exhibit erythropoietin (EPO) deficiency.
- To compare EPO levels in MSA patients with those in idiopathic Parkinson's disease (PD) patients and control groups.
- To explore the relationship between anemia, autonomic dysfunction, and EPO levels in MSA.
Main Methods:
- Studied serum EPO levels in 18 MSA patients, 32 PD patients, 23 iron-deficiency anemia controls, and 18 healthy controls.
- Assessed hemoglobin (Hb) concentration and serum creatinine in all groups.
- Evaluated autonomic function, including postural hypotension, in MSA and PD patients.
Main Results:
- Four MSA patients presented with unexplained anemia and abnormal autonomic function tests, including postural hypotension.
- Anemic MSA patients showed suppressed serum EPO levels relative to their anemia.
- Serum EPO levels in PD patients were within the normal range, and no PD patients were anemic.
Conclusions:
- A subset of MSA patients experiences anemia and postural hypotension, potentially linked to erythropoietin (EPO) deficiency.
- The findings suggest a distinct pattern of EPO regulation in MSA compared to other conditions.
- This EPO deficiency in anemic MSA patients may hold significant therapeutic implications for managing their anemia.