TY - JOUR
T1 - The expression of activity-dependent neuroprotective protein (ADNP) is regulated by brain damage and treatment of mice with the ADNP derived peptide, NAP, reduces the severity of traumatic head injury
AU - Gozes, Illana
AU - Zaltzman, Roy
AU - Hauser, Janet
AU - Brenneman, Douglas E.
AU - Shohami, Esther
AU - Hill, Joanna M.
PY - 2005/4
Y1 - 2005/4
N2 - NAP is a short octapeptide sequence (single letter code, NAPVSIPQ) that protects neurons against a wide variety of insults. The NAP sequence was identified by peptide structure/function scanning of activity-dependent neuroprotective protein (ADNP), a gene product essential for brain formation. To further evaluate the in vivo efficacy of NAP neuroprotection we used a mouse model of head trauma; a condition that presents a risk factor for the development of Alzheimer's disease in injured patients. In the mouse model, NAP treatment (prophylactic or curative) indicated improvement in longitudinal clinical, biochemical and anatomical outcomes. Furthermore, closed head injury was associated with a delayed increase in the expression of the immune cell surface glycoprotein Mac-1 (CD11B antigen) at the injury site that was decreased in NAP-treated mice. Additional experiments with Mac-1-deficient mice suggested partial protection against death related to severe head injury. NAP protection in Mac-1-deficient mice against adverse clinical outcome was concomitant with the time period when increases in Mac-1 transcripts were observed in the Mac-1 expressing mice (∼four weeks after the injury). The expression of ADNP (the NAP parent protein) was also increased at the injured brain site four weeks after the traumatic event, only in Mac-1 expressing mice. Here, using immunocytochemistry, we localized the increase in ADNP to microglia and astrocyte-like cells. The increase in ADNP in injured brains is now suggested to be a part of an endogenous compensatory mechanism and NAP treatment provides an additional protection. Toxicology studies suggest NAP as safe for further clinical development.
AB - NAP is a short octapeptide sequence (single letter code, NAPVSIPQ) that protects neurons against a wide variety of insults. The NAP sequence was identified by peptide structure/function scanning of activity-dependent neuroprotective protein (ADNP), a gene product essential for brain formation. To further evaluate the in vivo efficacy of NAP neuroprotection we used a mouse model of head trauma; a condition that presents a risk factor for the development of Alzheimer's disease in injured patients. In the mouse model, NAP treatment (prophylactic or curative) indicated improvement in longitudinal clinical, biochemical and anatomical outcomes. Furthermore, closed head injury was associated with a delayed increase in the expression of the immune cell surface glycoprotein Mac-1 (CD11B antigen) at the injury site that was decreased in NAP-treated mice. Additional experiments with Mac-1-deficient mice suggested partial protection against death related to severe head injury. NAP protection in Mac-1-deficient mice against adverse clinical outcome was concomitant with the time period when increases in Mac-1 transcripts were observed in the Mac-1 expressing mice (∼four weeks after the injury). The expression of ADNP (the NAP parent protein) was also increased at the injured brain site four weeks after the traumatic event, only in Mac-1 expressing mice. Here, using immunocytochemistry, we localized the increase in ADNP to microglia and astrocyte-like cells. The increase in ADNP in injured brains is now suggested to be a part of an endogenous compensatory mechanism and NAP treatment provides an additional protection. Toxicology studies suggest NAP as safe for further clinical development.
UR - http://www.scopus.com/inward/record.url?scp=20844438514&partnerID=8YFLogxK
U2 - 10.2174/1567205053585873
DO - 10.2174/1567205053585873
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C2 - 15974912
AN - SCOPUS:20844438514
SN - 1567-2050
VL - 2
SP - 149
EP - 153
JO - Current Alzheimer Research
JF - Current Alzheimer Research
IS - 2
ER -