Estimating Postmortem Interval by Protein Chip Detection Technology Combined with Multidimensional Statistics / 法医学杂志
Journal of Forensic Medicine
; (6): 660-665, 2020.
Artículo
en Chino
| WPRIM (Pacífico Occidental)
| ID: wpr-985162
Biblioteca responsable:
WPRO
ABSTRACT
Objective To obtain the protein expression profile of rat liver tissue after death by the 2100 bioanalyzer combined with protein chip, and infer the relationship between protein expression profile and postmortem interval. Methods Rats were killed by abdominal anesthesia and placed at 16 ℃. Water-soluble proteins in liver tissues were extracted at 14 time points after death. The expression profile data of proteins with relative molecular weight of 14 000-230 000 were obtained using protein chip, and principal component analysis (PCA), partial least squares-discriminant analysis (PLS-DA) and Fisher discriminant were used to analyze the data. Results According to the changes of protein expression profile, the postmortem interval was divided into group A (0 d), group B (1-9 d), group C (12-30 d) according to the result of PLS-DA. The prediction accuracy of the training set and test set of the model were all 100.0%, and the internal cross-validation of the training set was 100.0% according to Fisher discriminant. The Fisher discriminant model at each time point of group B and C was established to narrow the time window of postmortem interval estimation. The prediction accuracy of the training set and test set were all 100.0%, and the internal cross-validation accuracy of the training set was 100.0% in group B. The prediction accuracy of the training set and test set were respectively 95.2% and 78.6% in group C, and the internal cross-validation of the training set was 88.1%. Conclusion Protein chip detection technology can quickly and easily obtain the expression profile of water-soluble proteins of rat liver tissue with a relative molecular weight of 14 000-230 000 at different time points after death. PLS-DA and Fisher discriminant models are established to classify and predict the postmortem interval, in order to provide new ideas and methods for postmortem interval estimation.
Texto completo:
Disponible
Base de datos:
WPRIM (Pacífico Occidental)
Asunto principal:
Cambios Post Mortem
/
Autopsia
/
Tecnología
/
Análisis Discriminante
/
Análisis de los Mínimos Cuadrados
/
Análisis por Matrices de Proteínas
Límite:
Animales
Idioma:
Chino
Revista:
Journal of Forensic Medicine
Año:
2020
Tipo del documento:
Artículo