INTESTINAL INVERTASE: PRECOCIOUS DEVELOPMENT OF ACTIVITY AFTER INJECTION OF HYDROCORTISONE

Area of Science:

• Biochemistry
• Developmental Biology
• Pharmacology

Background:

• Intestinal enzyme development is a complex, age-dependent process.
• Hormonal regulation plays a crucial role in mammalian development.
• Hydrocortisone is a key corticosteroid hormone influencing various physiological processes.

Purpose of the Study:

• To investigate the effect of hydrocortisone on the precocious development of invertase activity in the rat small intestine.
• To determine the time course of hydrocortisone-induced invertase maturation.
• To assess whether hydrocortisone affects other intestinal enzymes like lactase.

Main Methods:

• Intraperitoneal injection of hydrocortisone to neonatal rats (3-9 days old).
• Organ culture of rat intestine (5-6 days old) with added hydrocortisone.
• Assay of invertase and lactase enzyme activities in intestinal tissue.

Main Results:

• Hydrocortisone injection significantly accelerated the development of invertase activity.
• Peak invertase activity was observed approximately 72 hours post-injection.
• Hydrocortisone exposure in organ culture also induced invertase activity.
• Lactase activity was not significantly affected by hydrocortisone treatment.

Conclusions:

• Hydrocortisone administration can induce precocious development of invertase in the rat small intestine.
• The mechanism of action appears specific to invertase and does not broadly hasten overall intestinal maturation.
• These findings highlight the role of corticosteroids in regulating specific enzyme ontogeny in the developing gut.