TY - JOUR
T1 - Evidence for prostaglandin E2 receptor expression in the intramural ganglia of the guinea pig urinary bladder
AU - Rahnama'i, Mohammad S.
AU - Hohnen, Ramona
AU - van Kerrebroeck, Philip E. V.
AU - van Koeveringe, Gommert A.
PY - 2015
Y1 - 2015
N2 - Intramural ganglia are present in the bladder wall of several species including human, pig, and guinea-pig. It has been suggested that there is a network of intramural ganglia in the bladder of these species that may be part of a motor-sensory system and receive afferent input. Prostaglandins (PG) have been suggested to play a role in this afferent signalling mechanism. To investigate the distribution of the prostaglandin E-2 receptors EP1 and EP2 in and around intramural ganglia of the guinea pig, bladders of 6 guinea pigs were dissected, and processed for immunohistochemistry. Sections were examined for prostaglandin E-2 receptor EP1- and EP2-immuno-reactivity and co-stained for vimentin, a marker for interstitial cells (IC) and cyclo-oxygenase I (COX I), the enzyme responsible for PG synthesis. Immunoreactivities for EP1 and EP2 were found in intramural ganglion cells. These cells were observed in between muscle bundles and on, or close to the serosal surface of the bladder. Furthermore, COX I was present in interstitial cells close to ganglion cells, indicating the possibility of a local synthesis of prostaglandins near the ganglia. The co-staining of EP1 or EP2 with vimentin showed that processes of interstitial cells run through the ganglia, often encircling or ensheathing cells. Therefore, it can be concluded that there is a close relationship between the intramural ganglia and the network of interstitial cells in the muscular layers of the bladder. EP1 and EP2 receptors are expressed on the ganglia and this arrangement suggests that intramural ganglia are involved in (pre)processing afferent information.
AB - Intramural ganglia are present in the bladder wall of several species including human, pig, and guinea-pig. It has been suggested that there is a network of intramural ganglia in the bladder of these species that may be part of a motor-sensory system and receive afferent input. Prostaglandins (PG) have been suggested to play a role in this afferent signalling mechanism. To investigate the distribution of the prostaglandin E-2 receptors EP1 and EP2 in and around intramural ganglia of the guinea pig, bladders of 6 guinea pigs were dissected, and processed for immunohistochemistry. Sections were examined for prostaglandin E-2 receptor EP1- and EP2-immuno-reactivity and co-stained for vimentin, a marker for interstitial cells (IC) and cyclo-oxygenase I (COX I), the enzyme responsible for PG synthesis. Immunoreactivities for EP1 and EP2 were found in intramural ganglion cells. These cells were observed in between muscle bundles and on, or close to the serosal surface of the bladder. Furthermore, COX I was present in interstitial cells close to ganglion cells, indicating the possibility of a local synthesis of prostaglandins near the ganglia. The co-staining of EP1 or EP2 with vimentin showed that processes of interstitial cells run through the ganglia, often encircling or ensheathing cells. Therefore, it can be concluded that there is a close relationship between the intramural ganglia and the network of interstitial cells in the muscular layers of the bladder. EP1 and EP2 receptors are expressed on the ganglia and this arrangement suggests that intramural ganglia are involved in (pre)processing afferent information.
KW - Bladder
KW - Ganglion
KW - Prostaglandin
KW - EP1
KW - EP2
KW - Neuromodulation
U2 - 10.1016/j.jchemneu.2015.03.001
DO - 10.1016/j.jchemneu.2015.03.001
M3 - Article
C2 - 25813425
SN - 0891-0618
VL - 64-65
SP - 43
EP - 47
JO - Journal of Chemical Neuroanatomy
JF - Journal of Chemical Neuroanatomy
ER -