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In an elegant study in 2022 by Miano et al , they showed that while there was a rise in serum creatinine on day 2 of combined vancomycin and pipercillin-tazobactam therapy, there was no change in cystatin C levels, confirming the pseudo-toxicity theory of decreased renal creatinine secretion without underlying kidney injury or loss of glomerular filtration

10.1016/j.chroma.2025.465663 2 AhmedS

This does not mean injectable GHK-Cu is ineffective in humans -- it means the evidence does not yet exist to confirm or quantify its effects

IFN--secreting-mesenchymal stem cells exert an antitumor effect in vivo via the TRAIL pathway