A study of neurotransmitters in human inner ear. Preservation of human temporal bone and value of organ donation for inner ear research
| Autor: | G. Egg, Michaela Seyr, Burkhard Hussl, Anneliese Schrott-Fischer, Weijia Kong |
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| Rok vydání: | 1994 |
| Předmět: |
Adult
Male Pathology medicine.medical_specialty Biology Efferent nerve Temporal bone medicine Cadaver Humans Inner ear Organ donation Cochlea gamma-Aminobutyric Acid Aged Aged 80 and over Neurotransmitter Agents Research Temporal Bone General Medicine Anatomy Organ Preservation Middle Aged Choline acetyltransferase Tissue Donors medicine.anatomical_structure Otorhinolaryngology Cytoarchitecture Vestibule Ear Inner Female sense organs |
| Zdroj: | Acta oto-laryngologica. 114(3) |
| ISSN: | 0001-6489 |
| Popis: | Twenty-nine human temporal bones (TBs) from 3 different groups of patients were used to investigate an effective preservation method of the inner ear and to study the suitability of TBs from organ donors for human inner ear research. Inner ears were fixed by perilymphatic perfusion and immersion fixation. Choline acetyltransferase (ChAT) and gamma-aminobutyric acid (GABA) activities were detected either by an indirect immunostaining method or by the peroxidase-anti-peroxidase (PAP) technique. The results show that the cytoarchitecture of the sensory epithelia is excellently preserved in specimens fixed within 2 h after death. ChAT- and GABA-immunoreactivities were revealed in the efferent nerve endings and fibers of the cochlea. Morphological preservation of the sensory epithelia was also good in specimens fixed within 5 h after death. However, inner ear sensory epithelia of organ donors that had died from head trauma and were in the definite brain death state for at least 7 1/2 h were severely damaged and showed cellular debris due to autolysis, although they were fixed within 2 1/2 h after death. The mechanisms underlying this damage of the sensory epithelia are discussed. |
| Databáze: | OpenAIRE |
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