International Journal of Legal Medicine最新文献

筛选
英文 中文
A probability model for estimating age in young individuals relative to key legal thresholds: 15, 18 or 21-year 根据关键法律临界值估算年轻人年龄的概率模型:15、18 或 21 岁
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-18 DOI: 10.1007/s00414-024-03324-x
Nina Heldring, Ali-Reza Rezaie, André Larsson, Rebecca Gahn, Brita Zilg, Simon Camilleri, Antoine Saade, Philipp Wesp, Elias Palm, Ola Kvist
{"title":"A probability model for estimating age in young individuals relative to key legal thresholds: 15, 18 or 21-year","authors":"Nina Heldring, Ali-Reza Rezaie, André Larsson, Rebecca Gahn, Brita Zilg, Simon Camilleri, Antoine Saade, Philipp Wesp, Elias Palm, Ola Kvist","doi":"10.1007/s00414-024-03324-x","DOIUrl":"https://doi.org/10.1007/s00414-024-03324-x","url":null,"abstract":"<p>Age estimations are relevant for pre-trial detention, sentencing in criminal cases and as part of the evaluation in asylum processes to protect the rights and privileges of minors. No current method can determine an exact chronological age due to individual variations in biological development. This study seeks to develop a validated statistical model for estimating an age relative to key legal thresholds (15, 18, and 21 years) based on a skeletal (CT-clavicle, radiography-hand/wrist or MR-knee) and tooth (radiography-third molar) developmental stages. The whole model is based on 34 scientific studies, divided into examinations of the hand/wrist (15 studies), clavicle (5 studies), distal femur (4 studies), and third molars (10 studies). In total, data from approximately 27,000 individuals have been incorporated and the model has subsequently been validated with data from 5,000 individuals. The core framework of the model is built upon transition analysis and is further developed by a combination of a type of parametric bootstrapping and Bayesian theory. Validation of the model includes testing the models on independent datasets of individuals with known ages and shows a high precision with separate populations aligning closely with the model’s predictions. The practical use of the complex statistical model requires a user-friendly tool to provide probabilities together with the margin of error. The assessment based on the model forms the medical component for the overall evaluation of an individual’s age.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Age estimation from median palatine suture using computed tomography reconstructed 3D images: a comparison of Northern and Southwestern Chinese populations 使用计算机断层扫描重建的三维图像从腭中缝推测年龄:华北和西南人群的比较
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-17 DOI: 10.1007/s00414-024-03333-w
Ye Xue, Fei Fan, Meng Liu, Shuai Luo, Huikun Yang, Yuxiao Sun, Mengjun Zhan, Zhao Peng, Zhigang Su, Hong Du, Yuchi Zhou, Zhenhua Deng
{"title":"Age estimation from median palatine suture using computed tomography reconstructed 3D images: a comparison of Northern and Southwestern Chinese populations","authors":"Ye Xue, Fei Fan, Meng Liu, Shuai Luo, Huikun Yang, Yuxiao Sun, Mengjun Zhan, Zhao Peng, Zhigang Su, Hong Du, Yuchi Zhou, Zhenhua Deng","doi":"10.1007/s00414-024-03333-w","DOIUrl":"https://doi.org/10.1007/s00414-024-03333-w","url":null,"abstract":"<p>To investigate the potential of computed tomography (CT) images of median palatine suture (MP) for adult age estimation in the Northern and Southwestern Chinese populations. A total of 1110 cranial CT scans from individuals aged 10–79 years, including 557 northern Chinese and 553 southwestern Chinese, were collected for analysis. After volume reformation and multiplanar reconstruction, a total of 20 slices of median palatine suture were selected from each individual. The closure of sutures was analyzed into four stages, and the cumulative scores of 20 slices were recorded as the suture closure score (SCS). The correlations between SCS and age were compared among the two Chinese populations residing in diverse geographic regions. Regression models were established for age estimation. The estimation accuracy was evaluated based on the test set. The mean absolute error (MAE) and the correlation between predicted age and chronological age were calculated to evaluate estimation accuracy. The SCS of MP exhibited a significant correlation with age (0.613, northern male; 0.678, southwestern male; 0.730, northern female; 0.704, Southwestern female; 0.662, total). Furthermore, there were statistically significant differences in SCS among different regions and sex groups (<i>p</i> &lt; 0.001). The cubic regression model had the highest R2 value in all subjects, especially among Northern females and Southwestern males, while the power and quadratic regression models showed the highest R2 value in Northern males and Southwestern females, respectively. In the test set, the Northern cohort demonstrated a lower MAE (9.06 ± 7.32 years, males; 9.17 ± 5.28 years, females) compared to the Southwestern cohort (9.19 ± 7.49 years, male; 10.61 ± 6.83 years, female). Additionally, it was observed that males exhibited a lower MAE than females in both regional groups. This study demonstrated the potential utility of CT images of the MP for age estimation in Chinese populations, emphasizing the significance of incorporating regional and sex factors within this context.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 10-year retrospective analysis of sudden unexpected death in the young investigated at Salt River Mortuary, Cape Town 对开普敦盐河殡仪馆调查的年轻人意外猝死事件进行的 10 年回顾性分析
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-17 DOI: 10.1007/s00414-024-03331-y
Micaela Louise Swart, Yuvika Vandayar, Calvin Gerald Mole, Ogheneochuko Oghenechovwen, Dirk Hamadziripi, Laura Jane Heathfield
{"title":"A 10-year retrospective analysis of sudden unexpected death in the young investigated at Salt River Mortuary, Cape Town","authors":"Micaela Louise Swart, Yuvika Vandayar, Calvin Gerald Mole, Ogheneochuko Oghenechovwen, Dirk Hamadziripi, Laura Jane Heathfield","doi":"10.1007/s00414-024-03331-y","DOIUrl":"https://doi.org/10.1007/s00414-024-03331-y","url":null,"abstract":"<p>Sudden unexpected death in the young (SUDY) is defined as the rapid, unsuspected demise of an apparently healthy individual between the ages of one and 40 years. There is a gap in research pertaining to this population in a South African context. This retrospective study aimed to explore the burden, scope of post-mortem investigation, and risk factors of SUDY admissions to Salt River Mortuary (SRM) in Cape Town between 1 January 2010 and 31 December 2019. Medico-legal case files pertaining to SUDY cases from SRM were reviewed. SRM received a total of 34 601 admissions in the 10-year period; of which 1 997 (5.77%) were SUDY cases. Nearly two-thirds (62.59%) of the SUDY admissions were male. The leading cause of death was pneumonia (17.11%), and the most prevalent organ system implicated in cause of death was the pulmonary system (45.19%). At least 32.46% of SUDY cases were infectious-related, with varying degrees of confidence. A large proportion of cases had no history of acute or chronic illness (45.43%), and no family history of illness (56.66%). In total, 52 potential candidates were identified for a molecular autopsy, of which 47 have stored biological samples for future investigations. This study advocates for the routine performance of post-mortem ancillary microbiological and toxicological testing in cases of SUD, considering the large burden of infectious disease and substance abuse in South Africa. The retention of biological samples in undetermined or non-specific natural cases is also urged, to allow for cause of death determination on a molecular level.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mood disorders and suicide: pilot study on postmortem toxicologic evidence and adherence to psychiatric therapy by determining blood levels of medications 情绪失调与自杀:通过测定血液中的药物浓度,对死后毒物学证据和坚持精神治疗进行试点研究
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-14 DOI: 10.1007/s00414-024-03327-8
Stefano Tambuzzi, Guido Travaini, Orsola Gambini, Federica Collini, Lorenzo Ginepro, Francesco Attanasio, Lorenzo Fregna, Federica Zucca, Domenico Di Candia, Alida Amadeo, Cristina Colombo, Alessio Battistini, Cristina Cattaneo
{"title":"Mood disorders and suicide: pilot study on postmortem toxicologic evidence and adherence to psychiatric therapy by determining blood levels of medications","authors":"Stefano Tambuzzi, Guido Travaini, Orsola Gambini, Federica Collini, Lorenzo Ginepro, Francesco Attanasio, Lorenzo Fregna, Federica Zucca, Domenico Di Candia, Alida Amadeo, Cristina Colombo, Alessio Battistini, Cristina Cattaneo","doi":"10.1007/s00414-024-03327-8","DOIUrl":"https://doi.org/10.1007/s00414-024-03327-8","url":null,"abstract":"<p>Suicide is one of the leading causes of death today, and among all mental illness, mood disorders account for one of the main risk factors. It is well known and proven that suicides are very common among people undergoing treatment and prescribed psychiatric medication. So far, however, there have only been a few studies dealing with this particular phenomenon. For this reason, autopsy patients who died by suicide, suffered from a mood disorder, and were known to be taking psychiatric medication at the time of death were selected for this study. The blood and urine samples taken during the autopsy underwent toxicological analysis and the results were compared with the prescribed therapy. A total of 22 people were included in the study: 12 presenting with depression and 10 with bipolar disorder. The toxicological analysis revealed that only 6 cases (27%) showed a qualitative match with the prescribed medication. In 5 cases (22.7%) the medication was only partially complied with and in 11 cases (50%) it was not complied with at all. Furthermore, even when medication was present, the value was often below the therapeutic range. Overall, more than 70% of the test subjects adhered to their medication only partially or not at all. Since treatment adherence is considered as a key factor in reducing the risk of suicide, this inevitably raises relevant clinical and forensic questions. Against this background, prospective monitoring of post-mortem medication levels in suicidal individuals and synergistic collaboration between clinicians and forensic pathologists could help to evaluate the effectiveness of specific medical interventions, highlight existing critical problems and develop new approaches to suicide prevention.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142261198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interpretation of molecular autopsy findings in 45 sudden unexplained death cases: from coding region to untranslated region 45 例不明原因猝死病例的分子尸检结果解读:从编码区到非翻译区
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-13 DOI: 10.1007/s00414-024-03329-6
Shouyu Wang, Jianghua Du, Qi Shen, Cordula Haas, Jacqueline Neubauer
{"title":"Interpretation of molecular autopsy findings in 45 sudden unexplained death cases: from coding region to untranslated region","authors":"Shouyu Wang, Jianghua Du, Qi Shen, Cordula Haas, Jacqueline Neubauer","doi":"10.1007/s00414-024-03329-6","DOIUrl":"https://doi.org/10.1007/s00414-024-03329-6","url":null,"abstract":"<p>Sudden unexplained death (SUD) can affect apparently healthy adolescents and young adults with no prior clinical symptoms and no clear diagnostic findings at autopsy. Although primary cardiac arrhythmias have been shown to be the direct cause of death in the majority of SUD cases, the genetic predisposition contributing to SUD remains incompletely understood. Currently, molecular autopsy is considered to be an effective diagnostic tool in the multidisciplinary management of SUD, but the analysis focuses mainly on the coding region and the significance of many identified variants remains unclear. Recent studies have demonstrated the strong association between human disease and genetic variants in untranslated regions (UTRs), highlighting the potential role of UTR variants in the genetic predisposition to SUD. In this study, we searched for UTR variants with likely functional effects in the exome data of 45 SUD cases. Among 244 genes associated with cardiac diseases, three candidate variants with high confidence of pathogenicity were identified in the UTRs of <i>SCO2</i>, <i>CALM2</i> and <i>TBX3</i> based on a rigorous filtering strategy. A functional assay further validated the effect of these candidate variants on gene transcriptional activity. In addition, the constraint metrics, intolerance indexes, and dosage sensitivity scores of genes affected by the candidate variants were considered when estimating the consequence of aberrant gene expression. In conclusion, our study presents a practical strategy for UTR variant prioritization and functional annotation, which could improve the interpretation of molecular autopsy findings in SUD cohorts.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Age estimation of burnt human remains through DNA methylation analysis 通过 DNA 甲基化分析估算烧焦人类遗骸的年龄
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-13 DOI: 10.1007/s00414-024-03320-1
Pierangela Grignani, Barbara Bertoglio, Maria Cristina Monti, Riccardo Cuoghi Costantini, Ugo Ricci, Martina Onofri, Paolo Fattorini, Carlo Previderè
{"title":"Age estimation of burnt human remains through DNA methylation analysis","authors":"Pierangela Grignani, Barbara Bertoglio, Maria Cristina Monti, Riccardo Cuoghi Costantini, Ugo Ricci, Martina Onofri, Paolo Fattorini, Carlo Previderè","doi":"10.1007/s00414-024-03320-1","DOIUrl":"https://doi.org/10.1007/s00414-024-03320-1","url":null,"abstract":"<p>The identification of human fire victims is a challenging task in forensic medicine. The heat-induced alterations of biological tissues can make the conventional anthropological analyses difficult. Even if the DNA profile of the victim is achieved, it is possible that no match can be found in a forensic DNA database, thus hindering positive identification. In such cases, any information useful to nail down a possible identity should be collected, such as DNA methylation analysis which could provide useful investigative leads. In the present study, five age-related epigenetic markers (ELOVL2, FHL2, KLF14, C1orf132, and TRIM59) were initially analysed in blood samples of 72 living Italian individuals of known age, using a Single Base Extension (SBE) assay. An age prediction model was built by multiple linear regression including all the markers (Mean Absolute Error, MAE: 3.15 years). This model was tested on 29 blood samples collected during autopsies from burnt human remains, already identified through DNA analysis, providing a MAE of 6.92 years. The model allowed a correct prediction in 79.3% of the cases (95% prediction interval), while six cases were associated with inaccurate predictions (min-max prediction error: 9.8–37.3 years). Among the different sample variables considered to explain these results, only the DNA degradation index was a relevant factor affecting the reliability of the predictions. In conclusion, the SBE typing of blood from burnt remains proved to be a reliable tool to estimate chronological age of most of the samples, also in consideration of its cost-effectiveness and the availability of CE sequencers in every forensic genetics laboratory.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A calcification subtraction method for postmortem coronary computed tomography angiography 死后冠状动脉计算机断层扫描血管造影的钙化减影法
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-12 DOI: 10.1007/s00414-024-03321-0
Go Inokuchi, Masatoshi Kojima, Fumiko Chiba, Yumi Hoshioka, Maiko Yoshida, Shigeki Tsuneya, Hirotaro Iwase
{"title":"A calcification subtraction method for postmortem coronary computed tomography angiography","authors":"Go Inokuchi, Masatoshi Kojima, Fumiko Chiba, Yumi Hoshioka, Maiko Yoshida, Shigeki Tsuneya, Hirotaro Iwase","doi":"10.1007/s00414-024-03321-0","DOIUrl":"https://doi.org/10.1007/s00414-024-03321-0","url":null,"abstract":"<p>Although coronary computed tomography (CT) angiography is a useful tool for evaluating coronary artery lesions both ante- and postmortem, accurate evaluation of the lumen is difficult when highly calcified lesions are present, owing to overestimation of stenosis caused by blooming and partial volume artifacts. In clinical practice, to overcome this diagnostic problem, a subtraction method has been devised to remove calcification by subtracting the precontrast image from the contrast image. In this report, we describe a calcification subtraction method using image analysis software for postmortem coronary CT angiography. This method was devised based on preliminary experimental results showing that the most accurate subtraction was achieved using images reconstructed with a narrower field of view and bone kernel, resulting in higher spatial resolution. This subtraction method allowed evaluation of lumen patency and the degree of stenosis on contrast-enhanced images in a verification using actual specimens where evaluation of the lumen had been difficult because of high calcification. The results were morphologically similar to the macroscopic findings. This method allows more rapid and reliable lesion retrieval and is expected to be useful for postmortem coronary angiography in forensic practice.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Post-mortem utility of Neuron Specific Enolase (NSE) and Calcium Binding Protein B (S100B) for differentiating traumatic brain injury from other causes of death 死后神经元特异性烯醇化酶(NSE)和钙结合蛋白 B(S100B)在区分创伤性脑损伤和其他死亡原因方面的作用
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-11 DOI: 10.1007/s00414-024-03332-x
Ramaswamy Nagappan, Siddhartha Das, Vinod Ashok Chaudhari, Prashant Shankarrao Adole, SreeRekha Jinkala, Harichandrakumar Kottyen Thazhath
{"title":"Post-mortem utility of Neuron Specific Enolase (NSE) and Calcium Binding Protein B (S100B) for differentiating traumatic brain injury from other causes of death","authors":"Ramaswamy Nagappan, Siddhartha Das, Vinod Ashok Chaudhari, Prashant Shankarrao Adole, SreeRekha Jinkala, Harichandrakumar Kottyen Thazhath","doi":"10.1007/s00414-024-03332-x","DOIUrl":"https://doi.org/10.1007/s00414-024-03332-x","url":null,"abstract":"<p>In forensic pathology, identifying causes of death in traumatic brain injuries (TBIs) devoid of observable signs presents a significant challenge. Post-mortem biochemistry plays a crucial role in forensic medicine, particularly in determining causes of death in TBIs that lack macroscopic or histopathological evidence. This study aimed to evaluate the utility of Neuron Specific Enolase (NSE) and S100 Calcium Binding Protein B (S100B) in post-mortem serum and cerebrospinal fluid (CSF) as markers for TBI. The relationship of these biochemical markers with survival time and post-mortem interval was also studied. The study sample consisted of 63 cases each from the TBI and the Non-TBI (NTBI) group. The NTBI group comprised of deaths due to mechanical asphyxia, myocardial infarction and isolated trunk trauma. While serum S100B and CSF NSE emerged as a promising marker for TBI, CSF S100B failed to differentiate TBI from the other causes of death. The absence of an association between the level of markers and survival time or post-mortem interval in TBIs highlights the limitations of these biomarkers in such contexts. This study underscores the potential of biochemical markers like serum S100B and CSF NSE in identifying TBI deaths, aiding forensic diagnoses where there are evidentiary limitations in traditional methods. Further research exploring additional markers and body fluids could enhance diagnostic precision in forensic neuropathology.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular age prediction using skull bone samples from individuals with and without signs of decomposition: a multivariate approach combining analysis of posttranslational protein modifications and DNA methylation 利用有腐烂迹象和无腐烂迹象个体的头骨样本进行分子年龄预测:结合翻译后蛋白质修饰和 DNA 甲基化分析的多元方法
IF 2.1 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-11 DOI: 10.1007/s00414-024-03314-z
J. Becker, V. Bühren, L. Schmelzer, A. Reckert, S. B. Eickhoff, S. Ritz, J. Naue
{"title":"Molecular age prediction using skull bone samples from individuals with and without signs of decomposition: a multivariate approach combining analysis of posttranslational protein modifications and DNA methylation","authors":"J. Becker, V. Bühren, L. Schmelzer, A. Reckert, S. B. Eickhoff, S. Ritz, J. Naue","doi":"10.1007/s00414-024-03314-z","DOIUrl":"https://doi.org/10.1007/s00414-024-03314-z","url":null,"abstract":"<p>The prediction of the chronological age of a deceased individual at time of death can provide important information in case of unidentified bodies. The methodological possibilities in these cases depend on the availability of tissues, whereby bones are preserved for a long time due to their mineralization under normal environmental conditions. Age-dependent changes in DNA methylation (DNAm) as well as the accumulation of pentosidine (Pen) and D-aspartic acid (D-Asp) could be useful molecular markers for age prediction. A combination of such molecular clocks into one age prediction model seems favorable to minimize inter- and intra-individual variation. We therefore developed (I) age prediction models based on the three molecular clocks, (II) examined the improvement of age prediction by combination, and (III) investigated if samples with signs of decomposition can also be examined using these three molecular clocks. Skull bone from deceased individuals was collected to obtain a training dataset (<i>n</i> = 86), and two independent test sets (without signs of decomposition: <i>n</i> = 44, with signs of decomposition: <i>n</i> = 48). DNAm of 6 CpG sites in <i>ELOVL2</i>,<i> KLF14</i>,<i> PDE4C</i>,<i> RPA2</i>,<i> TRIM59</i> and <i>ZYG11A</i> was analyzed using massive parallel sequencing (MPS). The D-Asp and Pen contents were analyzed by high performance liquid chromatography (HPLC). Age prediction models based on ridge regression were developed resulting in mean absolute errors (MAEs)/root mean square errors (RMSE) of 5.5years /6.6 years (DNAm), 7.7 years /9.3 years (Pen) and 11.7 years /14.6 years (D-Asp) in the test set. Unsurprisingly, a general lower accuracy for the DNAm, D-Asp, and Pen models was observed in samples from decomposed bodies (MAE: 7.4–11.8 years, RMSE: 10.4–15.4 years). This reduced accuracy could be caused by multiple factors with different impact on each molecular clock. To acknowledge general changes due to decomposition, a pilot model for a possible age prediction based on the decomposed samples as training set improved the accuracy evaluated by leave-one-out-cross validation (MAE: 6.6–12 years, RMSE: 8.1–15.9 years). The combination of all three molecular age clocks did reveal comparable MAE and RMSE results to the pure analysis of the DNA methylation for the test set without signs of decomposition. However, an improvement by the combination of all three clocks was possible for the decomposed samples, reducing especially the deviation in case of outliers in samples with very high decomposition and low DNA content. The results demonstrate the general potential in a combined analysis of different molecular clocks in specific cases.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142191034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation into temporal changes in the human bloodstain lipidome. 人类血迹脂质体的时间变化研究。
IF 2.2 3区 医学
International Journal of Legal Medicine Pub Date : 2024-09-09 DOI: 10.1007/s00414-024-03330-z
Weifen Sun, Ao Huang, Shubo Wen, Qianqian Kong, Xiling Liu
{"title":"Investigation into temporal changes in the human bloodstain lipidome.","authors":"Weifen Sun, Ao Huang, Shubo Wen, Qianqian Kong, Xiling Liu","doi":"10.1007/s00414-024-03330-z","DOIUrl":"https://doi.org/10.1007/s00414-024-03330-z","url":null,"abstract":"<p><p>Bloodstains are crucial pieces of physical evidences found at violent crime scenes, providing valuable information for reconstructing forensic cases. However, there is limited data on how bloodstain lipidomes change over time after deposition. Hence, we deployed a high-throughput high-performance liquid chromatography-mass spectrometry (HPLC-MS) approach to construct lipidomic atlases of bloodstains, whole blood, plasma, and blood cells from 15 healthy adults. A time-course analysis was also performed on bloodstains deposited for up to 6 months at room temperature (~ 25°C). The molecular levels of 60 out of 400 detected lipid species differed dramatically between bloodstain and whole blood samples, with major disturbances observed in membrane glycerophospholipids. More than half of these lipids were prevalent in the cellular and plasmic fractions; approximately 27% and 10% of the identified lipids were uniquely derived from blood cells and plasma, respectively. Furthermore, a subset of 65 temporally dynamic lipid species arose across the 6-month room-temperature deposition period, with decreased triacylglycerols (TAGs) and increased lysophosphatidylcholines (LPCs) as representatives, accounting for approximately 8% of the total investigated lipids. The instability of lipids increased linearly with time, with the most variability observed in the first 10 days. This study sheds light on the impact of air-drying bloodstains on blood components at room temperature and provides a list of potential bloodstain lipid markers for determining the age of bloodstains.</p>","PeriodicalId":14071,"journal":{"name":"International Journal of Legal Medicine","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142153977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信