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2017 | 295 | 33-42

Article title

Wstępne badania w kierunku potwierdzenia obecności krwi ludzkiej w śladach biologicznych na podstawie analizy mRNA

Content

Title variants

EN
Preliminary examinations aiming at confirming presence of human blood in biological traces by means of mRNA analysis

Languages of publication

PL EN

Abstracts

PL
Celem projektu było stworzenie specyficznej i zarazem taniej metody służącej do wykrywania ludzkiej krwi w śladach biologicznych opartej na analizie mRNA hemoglobiny z wykorzystaniem reakcji PCR w czasie rzeczywistym, z zastosowaniem niespecyficznego detektora typu SYBR Green. Ostatecznie opracowany test umożliwia jednoczesną analizę krzywych topnienia trzech fragmentów o różnej długości – HBB61, HBA197 i HBB503, oraz dodatkowo genu referencyjnego – mRNA β-aktyny. Jednoznaczna identyfikacja możliwa była już dla 0,1 μl krwi. Metoda jest specyficzna tkankowo i gatunkowo. Analizowane markery mRNA cechują się większą stabilnością w porównaniu do białka hemoglobiny wykrywanego standardowymi metodami. Wynik profilowania mRNA wykazuje wartość predykcyjną odnośnie jakości materiału genetycznego i obecności mieszaniny płynów. Wyniki badań wykonanych w ramach projektu wskazują na potencjalną przydatność markerów HBB i HBA1 w rutynowych badaniach genetyczno-sądowych. Jednak niezbędne jest przeprowadzenie szerszego spektrum eksperymentów walidacyjnych, a szczególnie przeanalizowanie większej liczby rzeczywistych śladów biologicznych, dokładne określenie optymalnej ilości użytego RNA oraz sprawdzenie różnic osobniczych w poziomach ekspresji.
EN
The aim of the project was to develop a specific and at the same time economical method for detecting human blood in biological traces based on analysis of haemoglobin mRNA with use of PCR reaction in real time and non-specific SYBR Green detector. The test, which has eventually been developed enabled simultaneous analysis of melting curves for three fragments of various lengths: HBB61, HBA197 and HBB503, as well as an additional reference gene: mRNA β-actin. A definite identification was possible already for 0,1 μl of blood. The method is tissue and species specific. The analysed mRNA markers are characterized by high stability, as compared to haemoglobin detected by standard methods. The result of mRNA profiling shows the predictive value as regards quality of genetic material and occurrence of mixture of liquids. Results of analyses performed during the project indicate potential usefulness of HBB and HBA1 markers in routine forensic genetic examinations. However, it is necessary to carry out a broader spectrum of validation experiments, and particularly to analyse a larger number of actual biological casework and precisely determining an optimal quantity of RNA and identifying ontogenetic differences in the levels of expression.

Year

Issue

295

Pages

33-42

Physical description

Contributors

  • Katedra Medycyny Sądowej, Collegium Medicum im. Ludwika Rydygiera w Bydgoszczy
  • Uniwersytet Mikołaja Kopernika w Toruniu
  • Katedra Medycyny Sądowej, Collegium Medicum im. Ludwika Rydygiera w Bydgoszczy,
  • Uniwersytet Mikołaja Kopernika w Toruniu
  • Katedra Medycyny Sądowej, Collegium Medicum im. Ludwika Rydygiera w Bydgoszczy
  • Uniwersytet Mikołaja Kopernika w Toruniu

References

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.desklight-0a4f7780-e49a-401f-9283-e99967e100dd
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