Abstract
Aim
Stable gastric pentadecapeptide BPC 157, administered before a high-dose magnesium injection in rats, might be a useful peptide therapy against magnesium toxicity and the magnesium-induced effect on cell depolarization. Moreover, this might be an NO-system-related effect. Previously, BPC 157 counteracts paralysis, arrhythmias and hyperkalaemia, extreme muscle weakness; parasympathetic and neuromuscular blockade; injured muscle healing and interacts with the NOS-blocker and NOS-substrate effects.
Main methods
Assessment included magnesium sulfate (560 mg/kg intraperitoneally)-induced muscle weakness, muscle and brain lesions, hypermagnesemia, hyperkalaemia, increased serum enzyme values assessed in rats during and at the end of a 30-min period and medication (given intraperitoneally/kg at 15 min before magnesium) [BPC 157 (10 µg, 10 ng), l-NAME (5 mg), l-arginine (100 mg), alone and/or together]. In HEK293 cells, the increasing magnesium concentration from 1 to 5 mM could depolarize the cells at 1.75 ± 0.44 mV.
Key findings
l-NAME + magnesium-rats and l-arginine + magnesium-rats exhibited worsened severe muscle weakness and lesions, brain lesions, hypermagnesemia and serum enzymes values, with emerging hyperkalaemia. However, l-NAME + l-arginine + magnesium-rats exhibited all control values and normokalaemia. BPC 157 abrogated hypermagnesemia and counteracted all of the magnesium-induced disturbances (including those aggravated by l-NAME or l-arginine). Thus, cell depolarization due to increasing magnesium concentration was inhibited in the presence of BPC 157 (1 µM) in vitro.
Significance
BPC 157 likely counteracts the initial event leading to hypermagnesemia and the life-threatening actions after a magnesium overdose. In contrast, a worsened clinical course, higher hypermagnesemia, and emerging hyperkalaemia might cause both l-NAME and l-arginine to affect the same events adversely. These events were also opposed by BPC 157.
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Acknowledgements
This research was supported by the Ministry of Science, Education and Sports, Republic of Croatia (Grant Number 108-1083570-3635).
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Medvidovic-Grubisic, M., Stambolija, V., Kolenc, D. et al. Hypermagnesemia disturbances in rats, NO-related: pentadecapeptide BPC 157 abrogates, l-NAME and l-arginine worsen. Inflammopharmacol 25, 439–449 (2017). https://doi.org/10.1007/s10787-017-0323-6
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DOI: https://doi.org/10.1007/s10787-017-0323-6