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DNA fingerprinting of freeze-dried tissues

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Summary

DNA profiling is usually unproblematic when carried out on material sampled shortly after death. Prolonged postmortem intervals and improper storage cause significant DNA degradation, however there are instances where DNA analysis becomes necessary months after the autopsy. In such cases the investigator may be able to revert to material initially stored for toxicological purposes. In some cases such specimens undergo freeze-drying before storage. We have therefore tested DNA fingerprinting of freeze-dried postmortem material. It was found that freeze-drying is a suitable method for preserving tissue samples for DNA profiling.

Zusammenfassung

DNA-Untersuchungen gestalten sich im allgemeinen unproblematisch, wenn des Untersuchungsmaterial kurzfristig nach dem Tode entnommen wurde. Längere postmortale Intervalle Bowie inadäquate Lagerung können zu entscheidender DNA-Degradierung führen. Es finden sich aber immer wieder Fälle, wo sich die Notwendigkeit des DNA-Printing erst Monate nach der Sektion ergibt. Hier ist der Untersucher u. U. gezwungen, auf Material zurückzugreifen, welches ursprünglich für mögliche chemisch-toxikologische Untersuchungen asserviert worden war. Manchmal werden solche Proben vor der Einlagerung gefriergetrocknet. Aus diesem Grunde testeten wir die Möglichkeit des genetischen Fingerabdruckes an gefriergetrocknetem Leichenmaterial. Es ergab sich, daß die Technik der Gefriertrocknung auch in Hinblick auf DNA-Untersuchungen eine geeignete Probenvorbereitung ist.

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Some contents of this paper were communicated as a poster at the 14th Congress of the International Society of Forensic Haemogenetics (Mainz, September 18–21, 1991)

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Huckenbeck, W., Bonte, W. DNA fingerprinting of freeze-dried tissues. Int J Leg Med 105, 39–41 (1992). https://doi.org/10.1007/BF01371236

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  • DOI: https://doi.org/10.1007/BF01371236

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