Analysis of the Development Trend in Forensic Odontology Based on CiteSpace / 法医学杂志

OBJECTIVES@#To realize the dynamic visualization of forensic odontology based on the bibliometrics methods, and capture the research hotspots and identify the future development trend.@*METHODS@#Literature articles published from January 1995 to December 2020 were searched according to specific subject words in the core data set of Web of Science. The visualization analysis of publishing country, institution, discipline, author, co-cited journal and keywords was performed by CiteSpace 5.7.R5W software.@*RESULTS@#The annual analysis of publications showed an upward trend of forensic odontology research literature year by year, with the number of annual publications more than 110 in the last five years. Developed countries were the main source of contributions and the average centrality was greater than 0.2. The research of forensic odontology involved multiple disciplines, including stomatology, biology, computer science and medical imaging, with a distinct interdisciplinary feature. A total of 115 nodes were obtained by keyword cluster analysis. The principal line of forensic odontology mainly included individual identification and age estimation and the emergence of hotspots was closely related to new technologies. Population-based odontology investigation, improvement of traditional dental age estimation method and dental age estimation based on new technology were popular research in forensic odontology.@*CONCLUSIONS@#Developing countries urgently need to increase the focus on related research. It may be an important direction for the development of forensic odontology to establish and enrich the regional dental database, develop new odontology identification technology combined with frontier and high-end technology, and develop the identification program based on advanced information technology.

Genetic polymorphisms and application of 9 STR loci of 5 ethnic groups in Gansu and Qinghai / 中南大学学报(医学版)

OBJECTIVE@#To examine the genetic polymorphism of 9 STR loci in 5 ethnic groups (including Tu, Sala, Dongxiang, Baoan and Yugu) in Gansu and Qinghai, and to evaluate its application.@*METHODS@#Nine STR loci (D3S1358, FGA, TH01, D7S820, VWA, CSF1PO, D5S818, D13S317 and TPOX) were selected as genetic markers. With STR compound amplification and genescan methods, in which STR loci were marked by fluorescence, the genotype of 5 ethnic groups were examined in 606 unrelated individuals by ABI 377 sequencer. These parameters, such as polymorphism information content (PIC), heterozygosity (H), discrimination power (DP) and probability of paternity exclusion (PPE) were calculated.@*RESULTS@#The genotype frequencies of the 9 STR loci were in accordance with Hardy-Weinberg equilibrium. PIC was within 0.6054 - 0.8735, H was within 0.6158 - 0.8736, DP was within 0.7964 - 0.9691, and PPE was within 0.4610 - 0.8838. Cluster analysis based on allele frequencies in genesis showed Tu, Sala, Dongxiang and Baoan ethnic groups were very close, but Yugu was a little bit far. There were obvious gene exchanges among the populations in north and south of China.@*CONCLUSION@#All the 9 STR loci are highly polymorphic in the 5 ethnic groups, which can be useful genetic markers in forensic medicine and population genetics.

The genetic polymorphism of 9 short tandem repeat loci in Yi ethnic group of Yunnan in China / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To study the short teadem repeat(STR) genetics structure of a Chinese Yunnan Yi racial group.</p><p><b>METHODS</b>Genetic distributions for nine STR loci were determined based on STR gene scan marked by fluorescence.</p><p><b>RESULTS</b>Sixty-nine alleles and 164 kinds of genotypes were detected and identified from 84 unrelated Yi racial individuals. The corresponding gene and genotype frequencies were in 0.0060-0.5060 or 0.0119-0.4167 respectively. The expected and observed genotype frequencies of nine STR loci were in accordance with the Hardy-Weinberg equilibrium(P>0.05). The statistical analyses of nine STR loci showed that PIC was distributed in 0.5804-0.8777, H was in 0.6507-0.8002, DP was in 0.7976-0.9558, EPP was in 0.5207-0.8386, except TPOX and THO1 loci.</p><p><b>CONCLUSION</b>Above research data enrich the Chinese genetic database, and play an important role in Chinese genetic study and in forensic application.</p>

Analysis of allele frequencies of 6 short tandem repeat loci on chromosome 12 in patients with Kashing-Beck disease / 南方医科大学学报

<p><b>OBJECTIVE</b>To analyze the allele frequencies of 6 STR loci (D12S358, D12S1675, D12S1663, D12S1697, D12S16725 and D12S1613) on chromosome 12 among KBD patients and residents in the KBD and non-KBD areas.</p><p><b>METHODS</b>EDTA-blood samples were collected from 146 unrelated Chinese Han individuals in Shaanxi Province including 57 KBD patients, 48 control subjects living in the Kashing-Beck disease(KBD) area and 48 in the non-KBD area. The DNA samples were extracted and amplified by PCR, and the PCR products were analyzed by ABI 3100 Genetic Analyzer.</p><p><b>RESULTS</b>In KBD patients, the allele number for the 6 STR loci (D12S358, D12S1675, D12S1663, D12S1697, D12S16725 and D12S1613) was 7, 7, 7, 10, 12 and 8, and the genotype number were 13, 12, 9, 17, 19 and 10, respectively; in the residents in KBD area, the allele number was 7, 5, 7, 9, 13 and 9, and the genotype number 12, 10, 12, 19, 16 and 8; in residents in non-KBD area, the allele number was 7, 5, 5, 12, 8 and 9, and the genotype number 17, 16, 8, 22, 14 and 8. There were significant differences in the allele frequencies in the D12S1725 loci between KBD patients and residents living in KBD area (P=0.0119) and the non-KBD area (P=0.0050), but no significant difference in other 5 loci among the 3 groups.</p><p><b>CONCLUSION</b>KBD patients have significantly different allele distribution patterns in the D12S1725 loci from the control subjects.</p>

Analysis on HLA haplotypes of loci HLA-A, -B, and -DRB1 in northwest Chinese Han population / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To investigate HLA-A, -B and -DRB1 allele and HLA-A-B, B-DRB1, A-B-DRB1 haplotype frequencies in the northwest Chinese Han population.</p><p><b>METHODS</b>The authors investigated the HLA-A, -B, -DRB1 allele and haplotype in a northwest Chinese Han population based on 62 families and 101 individuals by use of PCR-sequence specific oligonucleotide probes(PCR-SSOP) DNA typing methods.</p><p><b>RESULTS</b>Fifteen alleles for the locus HLA-A, 28 alleles for the HLA-B locus and 13 alleles for the HLA-DRB1 were detected. The results showed that the most frequent HLA alleles found were A02 (0.3244), B13 (0.1200), and DRB1*15 (0.1400). Allele frequencies of more than 10% for HLA antigens were A02, A11, A24, B13, B15, B40, DRB1*04, DRB1*07, DRB1*09, DRB1*15. In the analysis of HLA haplotypes, 122 kinds of HLA-A-B haplotypes and 147 kinds HLA-B-DRB1 haplotypes were found. Two hundred and seventy-eight kinds of HLA-A-B-DRB1 haplotypes were found, comprising 61.78%(278/450) of total theoretical haplotypes. Eighty-three kinds of HLA-A-B-DRB1 haplotypes were shown to have at least two same haplotypes, comprising 18.44%(83/450) of total theoretical haplotypes. The most common HLA-A-B-DRB1 haplotypes were A30-B13-DRB1*07, A02-B46-DRB1*09, A01-B37-DRB1*10, A24-B15-DRB1*15, A02-B46-DRB1*08, A33-B58-DRB1*03.</p><p><b>CONCLUSION</b>The data can be used for the estimation of the probability of finding haplotypically identical, related or unrelated bone marrow donor for an individual patient, and forensic and paternity tests to estimate the frequency of a DNA profile or anthropologic research.</p>

The study on HLA-Cw polymorphism from Xi'an Han population by PCR-sequence specific oligonucleotide probe / 法医学杂志

OBJECTIVE@#To determine the HLA-Cw allele and genotype frequencies from Xi'an Han population and obtain genetic data.@*METHODS@#The results of HLA-Cw typing for 130 randomly selected from Xi'an Han population were obtained by using the PCR-Sequence Specific Oligonucleotide Probes (SSOP).@*RESULTS@#In this investigation, 16 alleles were detected among 130 unrelated individuals with frequencies from 0.0077 to 0.1588 and HLA-Cw*01,03,07 were the most common HLA-Cw alleles. We have made a survey of HLA-Cw alleles frequencies in Xi'an Han Population, with blank frequency being lowered to 0.018 2.@*CONCLUSION@#The distribution of genotype frequencies met the law of Hardy-Weinberg equilibrium by Hi-square test. The frequency data can be used in forensic and paternity tests, transplant matching and anthropology.