Estimation of Chronological Age from Postmortem Tissues Based on Amino Acid Racemization†
Corresponding Author
Sıtkı Tiplamaz M.D.
Department of Forensic Medicine, School of Medicine, Marmara University, Istanbul, 34899 Turkey
Additional information and reprint requests:
Sıtkı Tiplamaz, M.D.
Marmara Üniversitesi Tıp Fakültesi Adli Tıp Anabilim Dalı
Fevzi Çakmak Mah
Muhsin Yazıcıoğlu Cad. No: 10 Üst Kaynarca/Pendik
Istanbul
Turkey
E-mail: [email protected]
Search for more papers by this authorMehmet Zafer Gören Ph.D., M.D.
Department of Medical Pharmacology, School of Medicine, Marmara University, Istanbul, 34899 Turkey
Search for more papers by this authorNurşen Turan Yurtsever Ph.D., M.D.
Department of Forensic Medicine, School of Medicine, Marmara University, Istanbul, 34899 Turkey
Search for more papers by this authorCorresponding Author
Sıtkı Tiplamaz M.D.
Department of Forensic Medicine, School of Medicine, Marmara University, Istanbul, 34899 Turkey
Additional information and reprint requests:
Sıtkı Tiplamaz, M.D.
Marmara Üniversitesi Tıp Fakültesi Adli Tıp Anabilim Dalı
Fevzi Çakmak Mah
Muhsin Yazıcıoğlu Cad. No: 10 Üst Kaynarca/Pendik
Istanbul
Turkey
E-mail: [email protected]
Search for more papers by this authorMehmet Zafer Gören Ph.D., M.D.
Department of Medical Pharmacology, School of Medicine, Marmara University, Istanbul, 34899 Turkey
Search for more papers by this authorNurşen Turan Yurtsever Ph.D., M.D.
Department of Forensic Medicine, School of Medicine, Marmara University, Istanbul, 34899 Turkey
Search for more papers by this authorAbstract
Skin and cartilage tissue specimens from 32 male and 13 female corpses aged between 17 and 50 years were collected within 24 h after the death. Each specimen was analyzed for the composition of dextro (D) and levo (L) forms of aspartate, glutamate, and alanine. Linear regression models were constructed using ln [(1 + D/L)/(1 − D/L] equation to define the relationship between the extent of racemization and the chronological age. Aspartate D/L rates from cartilage showed high correlation (r = 0.779, p < 0.001, n = 45). Aspartate D/L rates from skin showed very low correlation (r = 0.356, p < 0.002, n = 44). The multilinear regression model of both aspartate D/L rates of cartilage and skin tissues in 44 cases yielded a coefficient of r = 0.828 (p < 0.001). In conclusion, only racemization rate of Aspartate both in the skin and the cartilage tissues correlated with the chronological age. Our results may imply that the age can be estimated more precisely if two different tissue specimens are obtained from one corpse.
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