Related Experiment Videos
Plasma pyridoxal-5'-phosphate levels in myocardial infarction
Abstract:
In 34 patients with acute myocardial infarction (MI) plasma pyridoxal-5'-phosphate (PLP) levels were significantly lower (5.22 +/- 1.88 ng/ml) than those in an age- and sex-matched control group (11.5 +/- 2.03 ng/ml). In another group of patients who had clinical and angiographic evidence of ischaemic heart disease but had not had an MI plasma PLP levels were not significantly different from those in the control group (10.07 +/- 2.98 ng/ml). However, plasma high-density lipoprotein cholesterol levels in this group (0.75 +/- 0.28 mmol/l) as well as in the MI group (0.76 +/- 0.28 mmol/l) were significantly lower than those in the control group (1.26 +/- 0.23 mmol/l). On follow-up, all of 15 patients who had had an acute MI showed a continuous decrease in plasma PLP levels of approximately 50% during the first 48 hours after admission. Sixteen healthy volunteers subjected to a period of prolonged fasting (+/- 30 hours) displayed a decrease of approximately 43% over this period. We conclude that an acute reduction in plasma PLP levels occurred during the acute phase of MI. Other factors, for example prolonged acute starvation, may also produce a rapid decrease in plasma PLP levels.
Insights
Patients with acute myocardial infarction (MI) have significantly lower plasma pyridoxal-5'-phosphate (PLP) levels. This reduction occurs rapidly during the acute phase of MI, similar to effects seen during prolonged fasting.
Area of Science:
- Biochemistry
- Cardiology
- Nutritional Science
Background:
- Pyridoxal-5 -phosphate (PLP) is the active form of vitamin B6.
- Vitamin B6 plays a crucial role in numerous metabolic processes.
- Low PLP levels have been investigated in relation to cardiovascular health.
Purpose of the Study:
- To investigate plasma PLP levels in patients with acute myocardial infarction (MI).
- To compare PLP levels in MI patients with those in patients with ischaemic heart disease (IHD) but no MI, and healthy controls.
- To examine the temporal changes in plasma PLP levels during the acute phase of MI.
Main Methods:
- Plasma PLP levels were measured in 34 patients with acute MI, 28 patients with IHD, and age- and sex-matched controls.
- Plasma high-density lipoprotein cholesterol (HDL-C) levels were also measured.
- PLP levels were monitored in MI patients for 48 hours post-admission and in healthy volunteers undergoing fasting.
Main Results:
- Acute MI patients exhibited significantly lower plasma PLP levels (5.22 ng/ml) compared to controls (11.5 ng/ml).
- Patients with IHD but no MI had PLP levels not significantly different from controls (10.07 ng/ml), but lower HDL-C.
- Plasma PLP levels decreased by approximately 50% within 48 hours of acute MI admission, and by 43% during 30 hours of fasting.
Conclusions:
- An acute reduction in plasma PLP levels is observed during the acute phase of myocardial infarction.
- Prolonged acute starvation can also induce a rapid decrease in plasma PLP levels.
- These findings suggest that acute conditions, including MI and starvation, impact PLP homeostasis.