CNS induced neurogenic cystitis is associated with bladder mast cell degranulation in the rat.
OBJECTIVE
To determine if bladder mast cell degranulation is involved in the genesis of neurogenic cystitis induced by pseudorabies virus (PRV) invasion of the central nervous system (CNS).


METHODS
Rats received a total of 4 x 106 plaque forming units (pfu) of PRV-Bartha in the abductor caudalis dorsalis (ACD) muscle. Granulated bladder mast cells per mm2 of bladder tissue and urine histamine content were monitored as the cystitis developed over the next few days. In a subgroup of rats, intravesical resiniferatoxin was used to remove capsaicin-sensitive sensory bladder afferents, while another subgroup was pretreated with a mast cell degranulator.


RESULTS
PRV injection into the ACD muscle leads to neurogenic cystitis. Histamine levels were elevated in the urine of virus injected rats before any behavioral or microscopical signs of cystitis were present. When the cystitis became clinically manifest, urine histamine returned to control levels, and the number of granulated mast cells dropped significantly. Rats in which capsaicin-sensitive afferents had been removed did not show any signs of cystitis, or increase in urine histamine, or change in the number of granulated mast cells. Pretreatment of animals with a mast cell degranulator completely prevented the appearance of cystitis without altering the CNS disease.


CONCLUSIONS
These results provide further evidence that mast cells are involved in neurogenic cystitis induced by changes in CNS activity.
Jasmin
L
L
Departments of Neurosurgery, Cell Biology, Microbiology & Immunology, Georgetown University Medical Center, Washington, DC, USA.
Janni
G
G
Ohara
P T
PT
Rabkin
S D
SD
D000283:Administration, Intravesical; D000704:Analysis of Variance; D000818:Animals; D002211:Capsaicin / Q000494:pharmacology; D015550:Cell Degranulation / Q000187:drug effects / Q000502:physiology*; D020805:Central Nervous System Viral Diseases / Q000150:complications*; D003556:Cystitis / Q000473:pathology / Q000652:urine / Q000821:virology*; D003714:Denervation; D004195:Disease Models, Animal; D004224:Diterpenes / Q000008:administration & dosage / Q000494:pharmacology; D006632:Histamine / Q000652:urine; D008297:Male; D008407:Mast Cells / Q000187:drug effects / Q000502:physiology*; D020078:Neurogenic Inflammation / Q000473:pathology / Q000652:urine / Q000821:virology*; D009475:Neurons, Afferent / Q000187:drug effects; D009498:Neurotoxins / Q000008:administration & dosage / Q000494:pharmacology; D011557:Pseudorabies / Q000150:complications*; D051381:Rats; D017207:Rats, Sprague-Dawley; D001743:Urinary Bladder / Q000187:drug effects / Q000294:innervation / Q000473:pathology*
D004224:Diterpenes; D009498:Neurotoxins; D006632:Histamine; C024353:resiniferatoxin; D002211:Capsaicin