Less calcium in cremaster muscles of boys with undescended testis supports a deficiency in sympathetic innervation.

Abstract:

:In addition to an increase in contractility, contracted fibers and small and electron-dense mitochondria have suggested an increase of cytosolic Ca(2+) within the cremaster muscles (CM) associated with undescended testis. Therefore, the Ca(2+) content of CM associated with an undescended testis was determined and compared with the Ca(2+) content associated with inguinal hernia and hydrocele and in internal oblique muscles. CM samples from boys with undescended testis (n = 9), inguinal hernia (n = 15), and hydrocele (n = 7) and from girls with inguinal hernia (n = 8) were obtained. The calcium contents of these samples and of samples from internal oblique muscle (n = 6) were determined by atomic absorption spectrophotometry. While the Ca(2+) contents of CM from boys with undescended testis and from girls with inguinal hernia were similar (p > 0.05), the internal oblique muscle and the CM from boys with inguinal hernia and hydrocele contained more Ca(2+) than CM from boys with undescended testis (p < 0.05). Despite evidence of an increase in cytosolic calcium, the decrease in total calcium content suggests a decrease in the adenylyl cyclase activity, thus inhibition of influx of Ca(2+), but an increase in phospholipase C activity, and generation of more inositol 1,4,5-trisphosphate and mobilization of calcium from internal stores. Since the sympathetic system acts through adenylyl cyclase in striated muscles and is sexually dimorphic, similar Ca(2+) contents as encountered in girls suggest an alteration in the balance of autonomic innervation against the sympathetic system in boys with undescended testis.

journal_name

Urol Int

journal_title

Urologia internationalis

authors

Tanyel FC,Ulusu NN,Tezcan EF,Büyükpamukçu N

doi

10.1159/000065558

subject

Has Abstract

pub_date

2002-01-01 00:00:00

pages

111-5

issue

2

eissn

0042-1138

issn

1423-0399

pii

65558

journal_volume

69

pub_type

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