PSMA & Thyroid Cancer.: New study below... - Advanced Prostate...

Advanced Prostate Cancer

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PSMA & Thyroid Cancer.

pjoshea13 profile image
4 Replies

New study below.

PSMA is prostate-specific membrane antigen. A cautionary naming tale is that of prostaglandins. Discovered in prostate tissue in 1935 - & later, wherever researchers looked. Nevertheless, we later have prostate-specific antigen [PSA], which is not even gender-specific, & then, prostate-specific membrane antigen.

"Currently, the findings of imaging procedures used for detection or staging of prostate cancer depend on morphology of lymph nodes or bone metabolism and do not always meet diagnostic needs. Prostate-specific membrane antigen (PSMA), a transmembrane protein that has considerable overexpression on most prostate cancer cells, has gained increasing interest as a target molecule for imaging. To date, several small compounds for labelling PSMA have been developed and are currently being investigated as imaging probes for PET ..." [2]

Intro. to the new paper:

"Prostate-specific membrane antigen (PSMA), a type II transmembrane glycoprotein receptor, is highly expressed in prostate cancer and in the tumor neovasculature of colon, breast, and adrenocortical tumors."

"PSMA is significantly overexpressed in the neovasculature of {primary differentiated thyroid cancers [TCa]} compared with normal and benign thyroid nodules ..."

Thyroid cancer is of interest because a PCa diagnosis increases the probability of a TCa diagnosis - & vice versa.

Both cancer types have been described as being over-diagnosed, & men with both as being victims of over-screening.

I wonder how PSMA-PET imaging for PCa will affect TCa detection?

-Patrick

[1] ncbi.nlm.nih.gov/pubmed/288...

[2] ncbi.nlm.nih.gov/pubmed/269...

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pjoshea13
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4 Replies

I wonder why these two molecules are called antigens? Does that not mean that they evoke antibodies when they enter circulation? Do they? It does not make sense that PSA would, since they test for it.

I am referring to PSA and PSMA. Different macromolecules I presume.

ctarleton profile image
ctarleton in reply to

More descriptive Outline info here:

en.wikipedia.org/wiki/Prost...

en.wikipedia.org/wiki/Gluta...

in reply to ctarleton

Wikipedia does repeat that PSA is an antigen, and specifies the antibody: MAb 5D3D11. Not sure whether this answers the question or makes it more puzzling.

The PSMA article does not address the issue.

(Thanks)

MyDad76 profile image
MyDad76

Interesting! My uncle (dad's brother) had first thyroid cancer and than years latter prostate cancer. Now my father has prostate cancer.

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