Related Experiment Videos
Serum pyridoxal in patients with rheumatoid arthritis
Abstract:
Abnormalities of tryptophan metabolism have been reported in patients with rheumatoid arthritis (RA) and it has been suggested that these abnormalities are the result of disordered vitamin B6 metabolism. Fasting serum pyridoxal, assayed by an automated microbiological system, was found to be below normal in 35 out of 42 patients with RA while a similar abnormality was found in 8 out of 35 patients with osteoarthrosis (OA). Within the RA group the abnormality could not be related to the age, sex, or drug therapy of individuals but of the 8 patients with OA and a low serum pyridoxal, 7 were receiving indomethacin either alone or in conjunction with aspirin.
Insights
Patients with rheumatoid arthritis (RA) often show abnormal tryptophan metabolism linked to vitamin B6 deficiency. Low serum pyridoxal levels were common in RA patients, and some osteoarthrosis (OA) patients on indomethacin also had this deficiency.
Area of Science:
- Biochemistry
- Rheumatology
- Nutritional Science
Background:
- Tryptophan metabolism abnormalities are observed in rheumatoid arthritis (RA).
- These metabolic changes are hypothesized to stem from vitamin B6 (pyridoxine) metabolism dysregulation.
- Vitamin B6 is crucial for numerous enzymatic reactions, including those in the tryptophan pathway.
Purpose of the Study:
- To investigate serum pyridoxal levels in patients with rheumatoid arthritis (RA) and osteoarthrosis (OA).
- To explore potential links between vitamin B6 status and these joint diseases.
- To examine if drug therapies influence vitamin B6 levels in OA patients.
Main Methods:
- Fasting serum pyridoxal was measured using an automated microbiological assay.
- Serum pyridoxal levels were compared between RA patients, OA patients, and presumably healthy controls (implied).
- Data were analyzed concerning patient demographics, disease characteristics, and medication use (specifically indomethacin and aspirin in OA).
Main Results:
- Low serum pyridoxal levels were detected in a significant majority (35/42) of RA patients.
- A similar vitamin B6 deficiency was noted in 8 out of 35 osteoarthrosis (OA) patients.
- In OA patients with low serum pyridoxal, 7 out of 8 were concurrently treated with indomethacin, alone or with aspirin.
Conclusions:
- Patients with rheumatoid arthritis frequently exhibit low serum pyridoxal, suggesting a widespread vitamin B6 deficiency.
- Osteoarthrosis patients, particularly those on indomethacin, may also present with vitamin B6 deficiency.
- Disordered vitamin B6 metabolism could be a contributing factor to the pathophysiology or symptoms in RA and potentially in OA patients using specific NSAIDs.