As I wrote last week, I recently was very fortunate to attend two memorable donation-related events in New York City. Between the National Kidney Registry Awards Gala and the National Kidney Donation Organization‘s living kidney donation symposium, I heard fascinating research updates, applauded impressive awards and presentations by dedicated donation advocates, and learned so much.

I met and talked with people I admire and felt an immediate bond with. That held true from the first person I met when I sat down to breakfast at the NKDO symposium, held at the New York City Bar Association–a woman in a Kidney Donor Athletes tee shirt, who said she knew me from this website(!)–to the last person I met, after they’d closed the building and people were lingering outside: a donor/writer who started a nonprofit, Rock1Kidney, and was clearly moved when I talked about being at the Guinness Records gathering of living donors at the Bean.

It always takes time to digest all the new information and remarks, and invariably one or two strong takeaways emerge. This time it was a single word and dramatic new concept for me: eplets. They’re the key to what NKR calls the “Kidney for Life Initiative.”

It turns out that compatibility is way more nuanced than I ever imagined. You may have heard about HLA antigens (you know, the 6-out-of-6 match being the so-called “perfect match”?) . Well, apparently, “matching” antigens may look the same, but they differ by their eplet pattern (think of them as “immunologic hot spots”).

Fair warning: I am not a transplant surgeon, a scientist, or a medical writer, so please do not quote me on this. Rather, use the occasion to go ask someone who is–or, better yet, google Kidney for Life.

I’d seen the word eplet on charts and even heard it referenced at the NKR Gala presentations. I got the basic gist from the context, but it wasn’t until Dorry Segev, transplant surgeon at NYU Langone, explained it so well at the symposium that I “got it.” From what I understand, it’s time that potential donors and transplant recipients started using the term, as in “Do you test for eplets?”

Yup, Dr. Segev says “everyone should ask” that before a donation/transplant, so be sure to add it to your list of questions. Not all transplant centers do the necessary “high-resolution typing” that can see how many eplets are in the antigens. The number of eplet mismatches can make the difference between a kidney transplant that starts to deteriorate months later, and leads to rejection, and one that can conceivably last “for life,” requiring a lower level of immunosuppressants.

Wow–what a potential game changer! Though “eplets” are new to me, and probably to you, they’re hardly new to transplant professionals, who have been studying this “latest generation in DNA sequencing technology” (per the NKR website) for years. Dr. Segev thinks that within about five years, we’ll all be talking about eplets. I know I will and I hope you will too.

For related posts, resources, and information on The Insider’s Guide to Living Kidney Donation, be sure to explore the rest of my website.