TY - JOUR
T1 - Accumulation of nerve growth factor protein at both rostral and caudal stumps in the transected rat spinal cord
AU - Murakami, Yutaka
AU - Furukawa, Shoei
AU - Nitta, Atsumi
AU - Furukawa, Yoshiko
N1 - Funding Information:
The authors thank Dr. K. Tohyama (Iwate Medical University) for his beneficial advice on spinal injury. This research was supported in part by grants-in-aid for science research (No. 11557111) from the Ministry of Education, Science, and Culture of Japan.
PY - 2002/6/15
Y1 - 2002/6/15
N2 - Changes in the nerve growth factor (NGF) content in the rat spinal cord during development or after traumatic spinal cord injury were examined by using a two-site enzyme immunoassay (EIA) system and an immunohistochemical technique. From embryonic day (E) 14 to postnatal day (P) 70, the spinal cord contained 200-300 pg NGF/g of wet tissue evenly in all regions tested. After complete spinal cord transection of P49 rats, the NGF level started to increase in the rostral and caudal stumps nearest to the injury site at 2 and 4 days, respectively. The NGF level of the caudal side returned to the original level by 2 weeks, but that of the rostral side remained high even 3 weeks, after the injury. At 4 days after the injury, NGF-like immunoreactivity in both stumps was predominantly localized in the axon-like structures of the white matter and in cells morphologically resembling immune cells. These observations suggest that the NGF was transported within the spinal tracts, and that NGF secreted from immune cells that had invaded into the injured spinal cord had accumulated around the transection site. Increased NGF at the injury site may be advantageous for injured neurons and involved in mechanisms directing to axonal regeneration of the injured spinal cord.
AB - Changes in the nerve growth factor (NGF) content in the rat spinal cord during development or after traumatic spinal cord injury were examined by using a two-site enzyme immunoassay (EIA) system and an immunohistochemical technique. From embryonic day (E) 14 to postnatal day (P) 70, the spinal cord contained 200-300 pg NGF/g of wet tissue evenly in all regions tested. After complete spinal cord transection of P49 rats, the NGF level started to increase in the rostral and caudal stumps nearest to the injury site at 2 and 4 days, respectively. The NGF level of the caudal side returned to the original level by 2 weeks, but that of the rostral side remained high even 3 weeks, after the injury. At 4 days after the injury, NGF-like immunoreactivity in both stumps was predominantly localized in the axon-like structures of the white matter and in cells morphologically resembling immune cells. These observations suggest that the NGF was transported within the spinal tracts, and that NGF secreted from immune cells that had invaded into the injured spinal cord had accumulated around the transection site. Increased NGF at the injury site may be advantageous for injured neurons and involved in mechanisms directing to axonal regeneration of the injured spinal cord.
KW - Enzyme immunoassay (EIA)
KW - Immunohistochemistry
KW - Motoneurons
KW - Nerve growth factor (NGF)
KW - Neurotrophin
KW - Spinal cord transection
UR - http://www.scopus.com/inward/record.url?scp=0037098671&partnerID=8YFLogxK
U2 - 10.1016/S0022-510X(02)00080-1
DO - 10.1016/S0022-510X(02)00080-1
M3 - 学術論文
C2 - 12039665
AN - SCOPUS:0037098671
SN - 0022-510X
VL - 198
SP - 63
EP - 69
JO - Journal of the Neurological Sciences
JF - Journal of the Neurological Sciences
IS - 1-2
ER -