TY - JOUR
T1 - Differences in the total lipid and lipid class composition of larvae and metamorphosing sea lampreys, Petromyzon marinus
AU - Kao, Yung Hsi
AU - Youson, John H.
AU - Sheridan, Mark A.
N1 - Funding Information:
This work was supported by grants from the National Science Foundation, USA (IBN 9406707) to M.A.S. and from the Great Lakes Fishery Commission to J.H.Y.
PY - 1997
Y1 - 1997
N2 - This study compared the alterations in total lipid and lipid class composition of kidney, liver, and intestine from sea lamprey, Petromyzon marinus, during their nontrophic metamorphosis with these parameters in unmetamorphosed larvae. Total lipid in kidney and liver initially was higher by 104 and 66%, respectively, in the earliest metamorphic stage (3) examined compared to larvae and then decreased by 73 and 37%, respectively, from stage 3 to stage 7. Total lipid in intestine, on the other hand, was 53% lower at stage 3 compared to larvae and then significantly increased by 260% from stage 3 to stage 7. Large amounts of triacylglycerol (TG) in kidney and liver implicate these organs as lipid depots; much of the change in total lipid content of kidney and liver could be explained by alterations in TG, although significant variations in other lipid classes (e.g., phospholipid, cholesterol) also were noted. These results suggest that lamprey metamorphosis may proceed in two metabolic phases in a tissue-specific manner and that lipid depletion results from specific catabolism of stored TG reserves.
AB - This study compared the alterations in total lipid and lipid class composition of kidney, liver, and intestine from sea lamprey, Petromyzon marinus, during their nontrophic metamorphosis with these parameters in unmetamorphosed larvae. Total lipid in kidney and liver initially was higher by 104 and 66%, respectively, in the earliest metamorphic stage (3) examined compared to larvae and then decreased by 73 and 37%, respectively, from stage 3 to stage 7. Total lipid in intestine, on the other hand, was 53% lower at stage 3 compared to larvae and then significantly increased by 260% from stage 3 to stage 7. Large amounts of triacylglycerol (TG) in kidney and liver implicate these organs as lipid depots; much of the change in total lipid content of kidney and liver could be explained by alterations in TG, although significant variations in other lipid classes (e.g., phospholipid, cholesterol) also were noted. These results suggest that lamprey metamorphosis may proceed in two metabolic phases in a tissue-specific manner and that lipid depletion results from specific catabolism of stored TG reserves.
KW - Lamprey
KW - Larvae
KW - Lipid composition
KW - Metamorphosis
KW - Petromyzon marinus
UR - http://www.scopus.com/inward/record.url?scp=0000457264&partnerID=8YFLogxK
U2 - 10.1023/A:1007799028951
DO - 10.1023/A:1007799028951
M3 - Article
AN - SCOPUS:0000457264
SN - 0920-1742
VL - 16
SP - 281
EP - 290
JO - Fish Physiology and Biochemistry
JF - Fish Physiology and Biochemistry
IS - 4
ER -