Sep 11, 2026 · 44 min · 11 segments
!https://netrf.org/wp-content/uploads/2026/09/2_EP-56_ARTWORK-HORIZONTAL-1024x576.webp ## What Do We Know? GLP-1 medications have transformed the treatment of diabetes and obesity, with millions…
Jessica ThomasHost
Amr WahbaGuest
Meghan LaszloGuest
Po-Hien EarGuest
Udhayvir Singh GrewalGuest
Because GLP-1 receptor expression wasn't evenly distributed across net types, some were much more likely to express the receptor than others.

We only found five types of the 13 types that we tested that actually expressed the receptors.

Afterward, I think it was the gastric net, and it's only 17% of the gastric nets that we tested actually score positive.

And so this is an important group because usually, in terms of incident, pancreatic neuroendocrine tumor covers probably 20, 30% of our patient population.

And so knowing that only 13% out of this big population that we have to be careful is actually good news to us.

There's the two other category that we found was the pheochromocytoma, which is only 9% positive.

Across 576 tumors, only 7% expressed the GLP-1 receptor, but that 7% wasn't evenly distributed.

In this study, receptor expression was found most often in the duodenal nets, followed by gastric and pancreatic nets, with much lower percentages in pheochromocytoma and lung nets.

That begins to move the conversation away from a broad question like, are GLP-1 safe for net patients, towards more specific questions, including, what type of neuroendocrine tumor does this patient have? And what do we know about GLP-1 receptor expression in that tumor type? But there's an important limitation here.

Right now, testing a patient's tumor for the GLP-1 receptor is not a part of standard clinical care.

And we don't yet have the evidence telling doctors how to use such a result to make medication decisions.

And then we'll focus on subsets that do express the receptor to better understand their biology.

Our biggest hurdle at the moment is to try to get other clinical labs to set up this assay so that clinicians can order the test.

That said, so at least we, our study basically flagged these five types so that at least, you know, I feel like my clinician colleagues are a little bit more comfortable with like when they see other types of tumor and they know like, oh, well, this is probably not a big concern or at least, you know, it's most likely it's negative for the receptor.

Because GLP-1 receptor expression wasn't evenly distributed across net types, some were much more likely to express the receptor than others.

We only found five types of the 13 types that we tested that actually expressed the receptors.

Afterward, I think it was the gastric net, and it's only 17% of the gastric nets that we tested actually score positive.

And so this is an important group because usually, in terms of incident, pancreatic neuroendocrine tumor covers probably 20, 30% of our patient population.

And so knowing that only 13% out of this big population that we have to be careful is actually good news to us.

There's the two other category that we found was the pheochromocytoma, which is only 9% positive.

Across 576 tumors, only 7% expressed the GLP-1 receptor, but that 7% wasn't evenly distributed.

In this study, receptor expression was found most often in the duodenal nets, followed by gastric and pancreatic nets, with much lower percentages in pheochromocytoma and lung nets.

That begins to move the conversation away from a broad question like, are GLP-1 safe for net patients, towards more specific questions, including, what type of neuroendocrine tumor does this patient have? And what do we know about GLP-1 receptor expression in that tumor type? But there's an important limitation here.

Right now, testing a patient's tumor for the GLP-1 receptor is not a part of standard clinical care.

And we don't yet have the evidence telling doctors how to use such a result to make medication decisions.

And then we'll focus on subsets that do express the receptor to better understand their biology.

Our biggest hurdle at the moment is to try to get other clinical labs to set up this assay so that clinicians can order the test.

That said, so at least we, our study basically flagged these five types so that at least, you know, I feel like my clinician colleagues are a little bit more comfortable with like when they see other types of tumor and they know like, oh, well, this is probably not a big concern or at least, you know, it's most likely it's negative for the receptor.
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