Abstract
Enantioselective determination of aspartic acid (Asp) in the pineal gland of rodents with various melatonin contents was performed using a highly sensitive and selective two-dimensional HPLC system. After derivatization of the amino group with 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F), NBD-Asp was separated using a capillary monolithic ODS column in the first dimension. The fraction of NBD-Asp was automatically collected and transferred to the second dimension, and the D- and L-Asp were separated and determined using a narrowbore enantioselective column. Large amounts of D-Asp were observed in the pineal gland of the rats and specific strains of mice (C3H and CBA) possessing a high concentration of melatonin in their pineal gland. On the other hand, the amounts of D-Asp were small in the pineal gland of mice possessing a trace or no melatonin in their pineal gland (ddY, ICR, C57BL and BALB/c). In other tissues and physiological fluids, no significant strain-dependent changes of the D-Asp amounts were observed. These results indicate that large amounts of D-Asp are present only in the pineal gland containing large amounts of melatonin, and special care should be taken when selecting mouse strains for the investigation of D-Asp.
| Original language | English |
|---|---|
| Pages (from-to) | 2847-2853 |
| Number of pages | 7 |
| Journal | Journal of Separation Science |
| Volume | 34 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - Oct 1 2011 |
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All Science Journal Classification (ASJC) codes
- Analytical Chemistry
- Filtration and Separation
Cite this
Enantioselective micro-2D-HPLC determination of aspartic acid in the pineal glands of rodents with various melatonin contents. / Han, Hai; Miyoshi, Yurika; Oyama, Tsubasa; Konishi, Ryoko; Mita, Masashi; Hamase, Kenji.
In: Journal of Separation Science, Vol. 34, No. 20, 01.10.2011, p. 2847-2853.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Enantioselective micro-2D-HPLC determination of aspartic acid in the pineal glands of rodents with various melatonin contents
AU - Han, Hai
AU - Miyoshi, Yurika
AU - Oyama, Tsubasa
AU - Konishi, Ryoko
AU - Mita, Masashi
AU - Hamase, Kenji
PY - 2011/10/1
Y1 - 2011/10/1
N2 - Enantioselective determination of aspartic acid (Asp) in the pineal gland of rodents with various melatonin contents was performed using a highly sensitive and selective two-dimensional HPLC system. After derivatization of the amino group with 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F), NBD-Asp was separated using a capillary monolithic ODS column in the first dimension. The fraction of NBD-Asp was automatically collected and transferred to the second dimension, and the D- and L-Asp were separated and determined using a narrowbore enantioselective column. Large amounts of D-Asp were observed in the pineal gland of the rats and specific strains of mice (C3H and CBA) possessing a high concentration of melatonin in their pineal gland. On the other hand, the amounts of D-Asp were small in the pineal gland of mice possessing a trace or no melatonin in their pineal gland (ddY, ICR, C57BL and BALB/c). In other tissues and physiological fluids, no significant strain-dependent changes of the D-Asp amounts were observed. These results indicate that large amounts of D-Asp are present only in the pineal gland containing large amounts of melatonin, and special care should be taken when selecting mouse strains for the investigation of D-Asp.
AB - Enantioselective determination of aspartic acid (Asp) in the pineal gland of rodents with various melatonin contents was performed using a highly sensitive and selective two-dimensional HPLC system. After derivatization of the amino group with 4-fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F), NBD-Asp was separated using a capillary monolithic ODS column in the first dimension. The fraction of NBD-Asp was automatically collected and transferred to the second dimension, and the D- and L-Asp were separated and determined using a narrowbore enantioselective column. Large amounts of D-Asp were observed in the pineal gland of the rats and specific strains of mice (C3H and CBA) possessing a high concentration of melatonin in their pineal gland. On the other hand, the amounts of D-Asp were small in the pineal gland of mice possessing a trace or no melatonin in their pineal gland (ddY, ICR, C57BL and BALB/c). In other tissues and physiological fluids, no significant strain-dependent changes of the D-Asp amounts were observed. These results indicate that large amounts of D-Asp are present only in the pineal gland containing large amounts of melatonin, and special care should be taken when selecting mouse strains for the investigation of D-Asp.
UR - http://www.scopus.com/inward/record.url?scp=80054996642&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80054996642&partnerID=8YFLogxK
U2 - 10.1002/jssc.201100609
DO - 10.1002/jssc.201100609
M3 - Article
C2 - 21972206
AN - SCOPUS:80054996642
VL - 34
SP - 2847
EP - 2853
JO - Journal of Separation Science
JF - Journal of Separation Science
SN - 1615-9306
IS - 20
ER -