Biochemical changes in the rat brain associated with dinitrophenol-induced brain edema

Area of Science:

• Biochemistry
• Neuroscience
• Cell Biology

Background:

• Cerebral edema is a critical condition affecting brain function.
• Dinitrophenol is known to induce metabolic disturbances.

Purpose of the Study:

• To investigate the biochemical changes in the brain during dinitrophenol-induced cerebral edema.
• To evaluate the effects of dinitrophenol on lysosomal enzymes, RNA, protein concentration, and synthesis.
• To assess the potential protective role of tris (hydroxymethyl) aminomethane.

Main Methods:

• Induction of cerebral edema via intracarotid infusion of dinitrophenol in experimental models.
• Assay of lysosomal enzymes (acid phosphatase, cathepsin C, beta-glucuronidase) activity.
• Measurement of cerebral RNA and protein concentrations and in vitro synthesis rates.
• Administration of tris (hydroxymethyl) aminomethane as a co-treatment.

Main Results:

• A significant decrease in lysosomal enzyme activities (acid phosphatase, cathepsin C, beta-glucuronidase) was observed.
• Cerebral protein concentration dropped by over 50%, while RNA levels remained unchanged.
• Protein synthesis showed a 75% stimulation, and Na+-K+-ATP-ase levels were unaffected.
• Tris (hydroxymethyl) aminomethane treatment counteracted the observed biochemical alterations.

Conclusions:

• Dinitrophenol-induced cerebral edema causes a marked reduction in lysosomal enzyme activity and protein content but stimulates protein synthesis.
• The antiacidotic agent tris (hydroxymethyl) aminomethane demonstrates a protective effect against these dinitrophenol-induced biochemical changes in the brain.