Prolonged analgesia by enkephalinase inhibition in rats with spinal cord adrenal medullary transplants

J Sagen, H Wang - European journal of pharmacology, 1990 - Elsevier
Transplants of adrenal medullary tissue or isolated chromaffin cells into the spinal cord
subarachnoid space has been shown to reduce pain sensitivity in rats. This analgesia …

Increased levels of Met-enkephalin-like immunoreactivity in the spinal cord CSF of rats with adrenal medullary transplants

J Sagen, JE Kemmler - Brain research, 1989 - Elsevier
Recent work in our laboratory has demonstrated that the transplantation of adrenal
medullary tissue into the spinal cord subarachnoid space can reduce pain sensitivity …

Adrenal medullary tissue transplants in the rat spinal cord reduce pain sensitivity

J Sagen, GD Pappas, MJ Perlow - Brain research, 1986 - Elsevier
Adrenal chromaffin cells contain and release several neuroactive substances which induce
analgesia when injected directly into the spinal cord (eg opioid peptides and …

Absence of appreciable tolerance and morphine cross-tolerance in rats with adrenal medullary transplants in the spinal cord

H Wang, J Sagen - Neuropharmacology, 1994 - Elsevier
Adrenal medullary transplants in the spinal subarachnoid space may be a means of
achieving sustained local delivery of pain-reducing neuroactive substances on a continually …

Chromaffin cell transplants for alleviation of chronic pain

J Sagen - ASAIO Journal, 1992 - journals.lww.com
Abstract Treatment of intractable pain with parenteral, subarachnoid, or epidural narcotics is
often unsatisfactory due to tolerance and other systemic complications that accompany …

Attenuation of formalin pain responses in the rat by adrenal medullary transplants in the spinal subarachnoid space

JB Siegan, J Sagen - Pain, 1997 - journals.lww.com
Previous reports have indicated that the implantation of adrenal medullary chromaffin cells
into the spinal subarachnoid space can reduce both acute and chronic pain in several …

Antinociception produced by the peptidase inhibitor, RB 101, in rats with adrenal medullary transplant into the spinal cord

A Ortega-Alvaro, AJ Chover-Gonzalez… - European journal of …, 1998 - Elsevier
This study was undertaken to investigate the effects induced by the systemic administration
of RB 101 [N-{(R, S)-2-benzyl-3 [(S)(2-amino-4-methylthio) butyl dithio]-1-oxoprpyl}-l …

Adrenal medullary transplants increase spinal cord cerebrospinal fluid catecholamine levels and reduce pain sensitivity

J Sagen, JE Kemmler, H Wang - Journal of neurochemistry, 1991 - Wiley Online Library
Previous work in this laboratory has shown that adrenal medullary transplants into the spinal
cord subarachnoid space can reduce pain sensitivity. This analgesia most likely results from …

Reduced pain-related behavior by adrenal medullary transplants in rats with experimental painful peripheral neuropathy

AT Hama, J Sagen - Pain, 1993 - Elsevier
Adrenal medullary transplants in the spinal subarachnoid space, by providing a continual
source of opioid peptides and catecholamines, offer a potentially important adjunct in the …

Alterations in nociception following adrenal medullary transplants into the rat periaqueductal gray

J Sagen, GD Pappas, MJ Perlow - Experimental brain research, 1987 - Springer
Adrenal medullary chromaffin cells were transplanted to the midbrain periaqueductal gray, a
region known to play a primary role in the modulation of nociception. Chromaffin cells were …