Abstract
Tissue glucose transporter (GLUT1-3) and cationic amino acid transporter (CAT1-3) mRNA expression was determined in growing broiler chicks posthatch. In two experiments, tissues were either collected on days 1, 3 and 7 or days 1 and 14 posthatch. Heart and liver were the only tissues expressing a GLUT isoform on day 1. All tissues expressed a GLUT isoform on day 7 except for the thymus. Most tissues expressing a CAT isoform on day 1 decreased mRNA levels through day 7 (P<0.05), except for bursa CAT-1 which tended to increase (P=0.05). The thymus and spleen did not express any CAT isoform mRNA until day 7. The liver was the only tissue expressing GLUT-2 mRNA through day 14. On day 14, GLUT-1, CAT-1 and CAT-2 mRNA were differentially expressed across tissues (P<0.05). High-affinity GLUT and CAT mRNA expression was highest in the heart and bursa, respectively (P<0.05). Total CAT mRNA expression was greatest in the bursa (P<0.05). The thymus had the lowest high affinity GLUT and total CAT mRNA expression on day 14 posthatch. Therefore, T lymphocytes within the thymus may be most susceptible to glucose and cationic amino acid supply.
Original language | English (US) |
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Pages (from-to) | 515-525 |
Number of pages | 11 |
Journal | Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology |
Volume | 138 |
Issue number | 4 |
DOIs | |
State | Published - Aug 2004 |
Keywords
- Arginine
- Glucose
- Growth
- Lymphocyte
- Lysine
- Ontogeny
- Transport
ASJC Scopus subject areas
- Biochemistry
- Molecular Biology
- Physiology