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Published on: November 20, 2013
Tissue calcium levels in CaCl2-induced myelopathy
Neuroscience Letters
|August 31, 1984
Summary
Calcium chloride (CaCl2) application to rat spinal cords caused significant calcium (Ca2+) elevation, mirroring injury patterns. This suggests Ca2+ potentiates nerve damage, potentially via proteinase activation.
Area of Science:
- Neuroscience
- Biochemistry
- Pathology
Background:
- Myelopathy, or spinal cord damage, can result from various insults.
- Calcium ions (Ca2+) play critical roles in neuronal function and pathology.
Purpose of the Study:
- To investigate the role of calcium (Ca2+) in CaCl2-induced myelopathy in rats.
- To determine the time course and extent of Ca2+ accumulation in the spinal cord following direct application.
Main Methods:
- Induction of myelopathy in rats via topical application of CaCl2 to the lumbosacral spinal cord.
- Measurement of total Ca2+ concentration in spinal cord tissue using atomic absorption spectrophotometry at various time points.
- Comparison of Ca2+ levels in lumbar cord with cervical cord and control tissues.
Main Results:
- Significantly elevated Ca2+ levels were observed in the lumbar spinal cord within 2 hours of CaCl2 application.
- Peak Ca2+ concentration in the lumbar cord reached 3.9-fold that of controls by 8 hours.
- The time-dependent increase in Ca2+ resembled patterns seen after direct physical trauma to the spinal cord.
Conclusions:
- Direct application of CaCl2 leads to substantial Ca2+ accumulation in the spinal cord.
- These findings support the hypothesis that Ca2+ is involved in potentiating axonal and myelin degeneration.
- Ca2+-activated neutral proteinases may mediate the observed neurodegenerative effects.
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