Marinobufagenin (marinobufagin, MBG) is a cardiotonic bufadienolide steroid. It is secreted by the toad species such as Bufo marinus. It also can be found in the plasma and urine of human subjects with myocardial infarction, kidney failure, heart failure, and preeclampsia. MBG is a vasoconstrictor and a sodium–potassium adenosine triphosphatase (Na/K-ATPase) inhibitor with a high affinity for the alpha-1 isoform of the enzyme, the main isoform in the vascular wall and the kidney.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).