Abstract:
:NPY receptors represent novel molecular therapeutic targets in cancer and obesity. However, the extent of NPY receptor expression in normal human tissues is poorly investigated. Based on the role of NPY in reproductive functions, the NPY receptor expression was studied in 25 normal human testes and, additionally, 24 testicular tumors using NPY receptor autoradiography. In the normal testis, Leydig cells strongly expressed NPY receptor subtype Y2, and small arterial blood vessels Y1. Y2 receptors were found to be functional with agonist-stimulated [(35)S]GTPγS binding autoradiography. Full functional integrity of the NPY system was further suggested by the immunohistochemical detection of NPY peptide in nerve fibers directly adjacent to Leydig cells and arteries. Germ cell tumors expressed Y1 and Y2 on tumor cells in 33% and Y1 on intratumoral blood vessels in 50%. Based on its strong NPY receptor expression in Leydig cells and blood vessels, the normal human testis represents a potentially important physiological and pharmalogical NPY target.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Körner M,Waser B,Thalmann GN,Reubii JCdoi
10.1016/j.mce.2011.01.021subject
Has Abstractpub_date
2011-04-30 00:00:00pages
62-70issue
1-2eissn
0303-7207issn
1872-8057pii
S0303-7207(11)00057-8journal_volume
337pub_type
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