{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T15:33:23Z","timestamp":1791905603089,"version":"4.3.4"},"reference-count":82,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[1999,1,1]],"date-time":"1999-01-01T00:00:00Z","timestamp":915148800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cell Transplant"],"published-print":{"date-parts":[[1999,1]]},"abstract":"<jats:p>\n                    The use of cell lines utilized as biologic \u201cminipumps\u201d to provide antinociceptive molecules, such as GABA, in animal models of pain is a newly developing area in transplantation biology. The neuronal cell line, RN33B, derived from E13 brain stem raphe and immortalized with the SV40 temperature-sensitive allele of large T antigen (tsTag), was transfected with rat GAD\n                    <jats:sub>67<\/jats:sub>\n                    cDNA (glutamate decarboxylase, the synthetic enzyme for GABA), and the GABAergic cell line, 33G10.17, was isolated. The 33G10.17 cells transfected with the GAD\n                    <jats:sub>67<\/jats:sub>\n                    gene expressed GAD\n                    <jats:sub>67<\/jats:sub>\n                    protein and synthesized low levels of GABA at permissive temperature (33\u00b0C), when the cells were proliferating, and increased GAD\n                    <jats:sub>67<\/jats:sub>\n                    and GABA during differentiation at nonpermissive temperature (39\u00b0C) in vitro, because GAD\n                    <jats:sub>67<\/jats:sub>\n                    protein expression was upregulated with differentiation. A control cell line, 33V1, transfected with the vector alone, contained no GAD\n                    <jats:sub>67<\/jats:sub>\n                    or GABA at either temperature. These cell lines were used as grafts in a model of chronic neuropathic pain induced by unilateral chronic constriction injury (CCI) of the sciatic nerve. Pain-related behaviors, including cold and tactile allodynia and thermal and tactile hyperalgesia, were evaluated after CCI in the affected hind paw. When 33G10.17 and 33V1 cells were transplanted in the lumbar subarachnoid space of the spinal cord 1 week after CCI, they survived greater than 7 weeks on the pia mater around the spinal cord. Furthermore, the tactile and cold allodynia and tactile and thermal hyperalgesia induced by CCI was significantly reduced during the 2\u20137-week period after grafts of 33G10.17 cells. The maximal effect on chronic pain behaviors with the GABAergic grafts occurred 2\u20133 weeks after transplantation. Transplants of 33V1 control cells had no effect on the allodynia and hyperalgesia induced by CCI. These data suggest that a chronically applied, low local dose of GABA presumably supplied by transplanted cells near the spinal dorsal horn was able to reverse the development of chronic neuropathic pain following CCI. The use of neural cell lines that are able to deliver inhibitory neurotransmitters, such as GABA, in a model of chronic pain offers a novel approach to pain management.\n                  <\/jats:p>","DOI":"10.1177\/096368979900800102","type":"journal-article","created":{"date-parts":[[2017,6,22]],"date-time":"2017-06-22T15:17:28Z","timestamp":1498144648000},"page":"87-101","source":"Crossref","is-referenced-by-count":90,"title":["Article Commentary: Transplants of Neuronal Cells Bioengineered to Synthesize GABA Alleviate Chronic Neuropathic Pain"],"prefix":"10.1177","volume":"8","author":[{"given":"M. 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