{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T01:40:55Z","timestamp":1792201255354,"version":"4.4.0"},"reference-count":42,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:sec>\n                    <jats:title>OBJECTIVE<\/jats:title>\n                    <jats:p>Neuropathic pain caused by traumatic neuromas is an extremely intractable clinical problem. Disorderly scar tissue accumulation and irregular and immature axon regeneration around the injury site mainly contribute to traumatic painful neuroma formation. Therefore, successfully preventing traumatic painful neuroma formation requires the effective inhibition of irregular axon regeneration and disorderly accumulation of scar tissue. Considering that chondroitin sulfate proteoglycans (CSPGs) can act on the growth cone and effectively inhibit axon regeneration, the authors designed and manufactured a CSPG-gelatin blocker to regulate the CSPGs\u2019 spatial distribution artificially and applied it in a rat model after sciatic nerve neurectomy to evaluate its effects in preventing traumatic painful neuroma formation.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS<\/jats:title>\n                    <jats:p>Sixty female Sprague Dawley rats were randomly divided into three groups (positive group: no covering; blank group: covering with gelatin blocker; and CSPG group: covering with the CSPG-gelatin blocker). Pain-related factors were evaluated 2 and 8 weeks postoperatively (n = 30). Neuroma growth, autotomy behavior, and histological features of the neuromas were assessed 8 weeks postoperatively (n = 30).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS<\/jats:title>\n                    <jats:p>Eight weeks postoperatively, typical bulb-shaped neuromas did not form in the CSPG group, and autotomy behavior was obviously better in the CSPG group (p &lt; 0.01) than in the other two groups. Also, in the CSPG group the regenerated axons showed a lower density and more regular and improved myelination (p &lt; 0.01). Additionally, the distribution and density of collagenous fibers and the expression of \u03b1\u2013smooth muscle actin were significantly lower in the CSPG group than in the positive group (p &lt; 0.01). Regarding pain-related factors, c-fos, substance P, interleukin (IL)\u201317, and IL-1\u03b2 levels were significantly lower in the CSPG group than those in the positive and blank groups 2 weeks postoperatively (p &lt; 0.05), while substance P and IL-17 remained lower in the CSPG group 8 weeks postoperatively (p &lt; 0.05).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS<\/jats:title>\n                    <jats:p>The authors found that CSPGs loaded in a gelatin blocker can prevent traumatic neuroma formation and effectively relieve pain symptoms after sciatic nerve neurotomy by blocking irregular axon regeneration and disorderly collagenous fiber accumulation in the proximal nerve stump. These results indicate that covering the proximal nerve stump with CSPGs may be a new and promising strategy to prevent traumatic painful neuroma formation in the clinical setting.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3171\/2020.3.jns193202","type":"journal-article","created":{"date-parts":[[2020,5,29]],"date-time":"2020-05-29T03:37:59Z","timestamp":1590723479000},"page":"1599-1609","source":"Crossref","is-referenced-by-count":25,"title":["Covering the proximal nerve stump with chondroitin sulfate proteoglycans prevents traumatic painful neuroma formation by blocking axon regeneration after neurotomy in Sprague Dawley rats"],"prefix":"10.3171","volume":"134","author":[{"given":"Fu-Lin","family":"He","sequence":"first","affiliation":[{"name":"Department of Microsurgery and Orthopedic Trauma, First Affiliated Hospital of Sun Yat-sen University, Guangzhou;"},{"name":"Center for Peripheral Nerve Tissue Engineering and Technology 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