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The pharmacological action of pronase-digested egg albumin upon cerebral hypoxia
Abstract:
The purification of a substance which protects mitochondrial activity against its decay in association with various cerebral pathologies, and the effect of this substance in vitro and in vivo have been mentioned. Defatted egg albumin was hydrolyzed with pronase, and diafiltrated through mesh, to obtain fractions of molecular weight less than 5,000. The diafiltrate was further fractionated using Sephadex G-25 column chromatography, and a fraction which had a protective action against the decay of mitochondrial DNP-ATPase activity was gathered. This digested egg albumin (DEA 5,000 S) showed no immunological reaction and seemingly penetrated well through the cell membrane. DEA 5,000 S prevented the decay of DNP-ATPase activity and swelling of brain mitochondria during aging in vitro. Also, the administration of DEA 5,000 S in vivo shortened the duration of unconsciousness and reduced EEG abnormalities in rats subjected to hypoxia in a special chamber filled with N2 gas. It is suggested that this Digested Egg Albumin has a marked action in restoring the function of metabolically impaired brain.
Insights
This study purified a novel substance, digested egg albumin (DEA 5,000 S), that protects brain mitochondria from decay. In vivo, DEA 5,000 S improved outcomes in rats experiencing hypoxia-induced brain impairment.
Area of Science:
- Biochemistry
- Neuroscience
- Gerontology
Background:
- Mitochondrial dysfunction is linked to cerebral pathologies and aging.
- Brain mitochondria are susceptible to decay, impacting neurological function.
- Developing protective agents for mitochondrial activity is crucial.
Purpose of the Study:
- To purify a substance that protects mitochondrial activity from decay.
- To investigate the in vitro and in vivo effects of this substance on brain mitochondria.
- To evaluate its potential therapeutic applications for metabolically impaired brains.
Main Methods:
- Defatted egg albumin hydrolysis with pronase followed by diafiltration.
- Fractionation using Sephadex G-25 column chromatography to isolate active components.
- In vitro assays measuring DNP-ATPase activity and mitochondrial swelling.
- In vivo studies involving hypoxia-induced brain impairment in rats.
Main Results:
- A low molecular weight fraction, digested egg albumin (DEA 5,000 S), was isolated.
- DEA 5,000 S protected brain mitochondria against decay and swelling in vitro.
- DEA 5,000 S administration reduced unconsciousness duration and EEG abnormalities in hypoxic rats.
- The substance showed no immunological reaction and good cell membrane penetration.
Conclusions:
- Digested egg albumin (DEA 5,000 S) effectively protects mitochondrial function.
- This substance demonstrates therapeutic potential for restoring function in metabolically impaired brains.
- Further research into DEA 5,000 S for neurological disorders is warranted.