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Cyclosporine necklace | sterling silver
An eleven-amino-acid cyclic peptide from a Norwegian soil fungus, brought back from a 1969 holiday by a Sandoz scientist sampling soil. The molecule that turned organ transplantation from an experimental procedure with poor odds into a routine clinical intervention. Worn here as a 30 mm sterling silver pendant.
The Science Behind Cyclosporine
Cyclosporine binds to cyclophilin to form a complex that inhibits calcineurin, the phosphatase responsible for dephosphorylating NFAT (nuclear factor of activated T cells). Without dephosphorylation, NFAT cannot enter the nucleus and trigger the gene expression programme that activates T cells. The transplant rejection cascade halts at its earliest step, and immunosuppression is achieved without the broad toxicity of earlier agents. The molecule itself is unusual: a cyclic undecapeptide containing several N-methylated amino acids that make it lipophilic and membrane-permeable despite its size, plus two D-amino acids, which is uncommon in natural products. Calcineurin as the molecular target was identified after the drug had already entered clinical use, a useful reminder that pharmacological effect often precedes mechanistic understanding.
Who Will Recognise It
- transplant physicians and transplant surgeons
- immunologists working on T-cell signalling or calcineurin inhibition
- pharmacologists and natural-product chemists
- transplant patients and their families carrying the molecule's significance
A cyclic peptide from a Norwegian soil sample, worn as a quiet acknowledgment of the field that grew out of it.
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FAQ
Why is cyclosporine the transplant pendant?
Because before cyclosporine entered clinical use in the late 1970s, organ transplantation outside identical-twin pairs was experimental, with low survival. Cyclosporine made selective immunosuppression possible, suppressing T-cell activation enough to prevent rejection while preserving the rest of the immune response. The kidney, liver, heart, and lung transplant programmes that exist today are built on it. Tacrolimus and other agents have come along since, but the door cyclosporine opened is the one transplant medicine still walks through.
Why are D-amino acids in the molecule unusual?
Because most ribosomally synthesised peptides and proteins use exclusively L-amino acids. D-amino acids appear mostly in non-ribosomal peptide synthesis, the route that fungi and bacteria use to assemble small bioactive molecules outside the ribosome. The presence of two D-amino acids in cyclosporine is a structural fingerprint of its non-ribosomal origin, and part of what makes it resistant to ordinary peptide-degrading enzymes in the gut and bloodstream.
What size is the pendant and what chain comes with it?
925 sterling silver, 30 mm pendant on a 45 cm sterling silver chain with a 5 cm extender. Nickel-free and hypoallergenic. Free worldwide DHL Express in 1-5 business days, with all import duties and taxes covered. 30-day “Love It or Return It” returns.
Is there a gold version?
Yes. The same cyclosporine pendant is available in 18K gold vermeil. Same molecule, different metal, different occasion.
Molecules
Delve into the hidden elegance of science with our meticulously crafted jewelry, inspired by the intricate structures of chemical molecules. Each piece serves as a tactile tribute to the building blocks of life and matter, capturing the allure of atoms and bonds in precious metals. A harmonious fusion of art and science, these creations are more than mere accessories; they're a celebration of the enigmatic beauty that underpins our universe.
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