OBJECTIVES: To investigate the ethnic origin of Chuanqing people, one of the largest unidentified ethnic groups in Guizhou, China, and analyze its genetic relationships with surrounding populations. METHODS: Based on a self-developed microhaplotype system, we conducted genotyping and analyzed the genetic distribution of microhaplotype loci and their forensic applicability in Chuanqing population in Guizhou Province. Using the microhaplotype data from different intercontinental populations and previously reported data from Han population living in Guizhou Province, we systematically investigated the genetic background of Chuanqing people through population genetic approaches, including genetic distance estimation, principal component analysis, and phylogenetic tree construction. RESULTS: Among the studied population, the number of haplotype per microhaplotype ranged from 6 to 25. The average expected heterozygosity (He), observed heterozygosity (Ho), power of discrimination (PD), and probability of exclusion (PE) were 0.8291, 0.8301, 0.9387, and 0.6593, respectively. The cumulative power of discrimination (CPD) and cumulative probability of exclusion (CPE) for these 33 loci were 1-2.62×10^-41 and 1-7.64×10^-17, respectively. Population genetic analyses revealed that the Chuanqing population had close genetic relationships with the East Asian populations, especially the local Guizhou Han population, Beijing Han population and the Han populations living in southern China. CONCLUSIONS The 33 microhaplotypes exhibit high levels of genetic diversity in the Guizhou Chuanqing population, highlighting their potentials for both forensic identification and parentage testing. The Han populations might have contributed a significant amount of genetic material to the Chuanqing population during the formation and development of the latter.
Humans ; China/ethnology* ; Ethnicity/genetics* ; Forensic Genetics/methods* ; Genetics, Population ; Genotype ; Haplotypes ; Phylogeny ; East Asian People/genetics*

ObjectiveTo study the inhibitory effect of polyphyllin Ⅰ （PPI） on the growth of colorectal cancer cells and its molecular mechanism. MethodRKO cells were cultured and divided into a blank group and PPI treatment groups with concentrations of 0.6， 0.8， 1.0 μmol·L^-1， respectively. HRT18 cells were cultured and divided into a blank group and PPI treatment groups with concentrations of 1.2， 1.4， 1.6 μmol·L^-1， respectively. The effects of PPI on the proliferation and morphology of colorectal cancer were detected by cell proliferation toxicity assay， trypan blue exclusion assay， plate clone formation assay， and confocal high-intension cell imaging analysis system. Flow cytometry was used to detect the apoptosis rate of colorectal cancer cells. The pQCXIP-GFP-LC3 plasmid transfection assay was used to detect the formation of autophagosomes in colorectal cancer cells after PPI treatment. Western blot was used to detect the expression of apoptosis-related proteins Caspase-3， Caspase-8， and poly ADP ribose polymerase （PARP）， the expression of autophagy related protein LC3Ⅱ， and the expression and phosphorylation of Hippo signaling pathway proteins LATS1 and YAP. In the plvx-Flag-YAP plasmid transfection assay， YAP was overexpressed and treated with PPI， and the proliferation of colorectal cancer cells was detected by cytotoxicity assay. The expression of LC3Ⅱ and PARP in colorectal cancer cells was detected by Western blot. SwissADME predicted pharmacokinetic parameters of PPI. ResultAs compared with the blank group， the survival rate and clone formation ability of colorectal cancer cells in the PPI group were significantly decreased （P<0.01）， the cell area of colorectal cancer cells in the PPI group was significantly decreased， and the roundness of colorectal cancer cells was significantly increased （P<0.01）. As compared with the blank group， the apoptosis rate of colorectal cancer cells in PPI treatment groupw was significantly increased （P<0.01）， the expression of apoptotic proteins Caspase-3 and Caspase-8 protein precursor in PPI treatment groups was decreased， and the cleavage of PARP was increased （P<0.01）. As compared with the blank group， the expression level of autophagy-related protein LC3Ⅱ in colorectal cancer cells in PPI treatment groups was significantly increased， and the formation of autophagosomes was promoted （P<0.01）. As compared with the blank group， the expression of YAP protein in colorectal cancer cells in PPI treatment groups was significantly decreased， and the expressions of phosphorylated LATS1 and YAP were significantly increased （P<0.01）. As compared with the blank group， overexpression of YAP could significantly antagonize the effect of PPI on apoptosis， autophagy activation， and proliferation inhibition of colorectal cancer cells. SwissADME simulation results showed that PPI had good drug like activity. ConclusionPPI can induce apoptosis and autophagy of colorectal cancer cells through targeted activation of Hippo signaling pathway， thereby inhibiting their proliferation.

Objective:To explore the safety of inactivating coronavirus disease 2019(covid-19)vaccine in liver transplantation(LT)recipients.Methods:Retrospective analysis was performed for clinical data of 151 LT recipients from March 2003 to October 2019.They had stable conditions and completed the course of covid-19 vaccine.Frequencies of pain at injection site, fatigue, headache and pruritus after vaccination were recorded.The safety profiles were compared between recipients with and without local and general adverse reactions after vaccination.At the same time, recipients completing two doses of covid-19 vaccines were grouped.According to vaccine companies, they were classified into Sinovac Biotech Ltd and Beijing Biological.Based upon more than or less than 60 years, they were grouped into <60 years and ≥60 years.The safety profiles of inactivating COVID-19 vaccine were compared in subgroups.Results:Among 151 eligible LT recipients, 98 of them were in group of age <60 years and 53 in group of age >60 years.The median period between vaccination and LT was 8.44(4.37, 12.39)years and the median concentration of tacrolimus 2.5(1.8, 3.9)ng/L.Eighty-three cases completed two doses of Sinovac Biotech Ltd(Sinovac Biotech Ltd group)and 40 cases Beijing Biological(Beijing Biological group); 14 cases had combined course of Sinovac Biotech Ltd and Beijing Biological, four recipients were vaccinated with inactivated vaccine from other companies and ten recipients did not know their inactivated vaccine' companies.After immunization, 24/151(15.9%)recipients had a local and general adverse reaction.The prevalence of pain at injection site, fatigue, headache and pruritus was 9.9%( n=15), 5.2%( n=8), 1.3%( n=2)and 0.7%( n=1)respectively.No significant differences existed in age( P=0.602), gender( P=0.752), period after LT( P=0.890), trough concentration of tacrolimus( P=0.377)or versions of covid-19 vaccine( P=0.582)between 24 cases with general adverse reaction and 127 without.Local and general reactions occurred in 16/83(19.3%)in Sinovac group and 5/40(12.5%)in Beijing Biological.There was no significant inter-group difference( P=0.769). There were 98 cases(64.9%)in <60 years group, 17 cases(17.3%)had local and general reaction, 53 cases(35.1%)in ≥60 years group and 7 cases(13.2%)had a local and systemic reaction.There was no significant inter-group difference( P=0.507). Conclusions:Covid-19 vaccine is safe for long-term survival LT recipients with normal liver function.Few participants present with mild fatigue and pain at injection site.

Objective:To study the impact of simultaneous ligation of splenic artery on prognosis of patients with severe hypersplenism in liver transplantation.Methods:A retrospective analysis was performed on the clinical data of 206 patients who underwent liver transplantation in the Fifth Medical Center of PLA General Hospital from December 2016 to February 2019. There were 180 males and 26 females, aged (51.0±9.0) years old. Fifty-one patients underwent splenic artery ligation during liver transplantation and they were enrolled into the observation group, and 155 patients without splenic artery ligation were enrolled into the control group. The changes in white blood cells (WBC), platelets, alanine aminotransferase, total bilirubin and serum creatinine as well as the incidence of postoperative complications were compared between the two groups.Results:The platelet count of the observation group was significantly lower than those of the control group before operation and on days 1, 3, 7, 30 and 90 after operation, (all P<0.05). The WBC counts in the observation group were significantly lower than those in the control group before operation and on days 1 and 3 after operation (all P<0.05). However, there were no significant differences in the WBC counts between the two groups on days 5, 7, 30 and 90 after operation (all P>0.05). There were also no significant differences in alanine aminotransferase and total bilirubin indexes between the two groups after surgery (all P>0.05), but the serum creatinine levels in the observation group were significantly lower than those in the control group on days 3, 5, 7 and 30 after surgery (all P<0.05). There were no significant differences in the rates of infection, severe acute rejection, biliary tract complications, arterial/portal thrombosis and mental complications between the two groups (all P>0.05). The rate of renal replacement therapy for acute kidney injury in the observation group (9.8%, 5/55) was significantly higher than that in the control group (1.3%, 2/155) ( P<0.05). Conclusion:Ligation of splenic artery during liver transplantation was safe and it had a significant advantage in the early postoperative recovery of WBC count and creatinine without increasing the incidence of complications in patients with severe hypersplenism.

Objective To study the possible mechanisms,efficacy and safety of acetaminophen and platelet-rich plasma (PRP) on promoting the closure of ductus arteriosus in preterm infants.Method From January 2016 to May 2018,preterm infants (gestational age＜34 weeks) with symptomatic patent ductus arteriosus (sPDA) admitted to our neonatal intensive care unitwere enrolled prospectively.15 mg/kg of acetaminophen was orally given every 6 hours for three days (acetaminophen group).If acetaminophen was contraindicated (PRP group) or acetaminophen therapy failed (PRP rescue group),PRP transfusion was given at a single dose of 20 ml/kg.Echocardiogram,platelet-derived growth factors (PDGF) and urinary prostaglandin E2 (PGE2) were examined before and 72 hours after treatment.The data were analyzed using ANOVA,student's t test,Kruskal-Wallis H method and chi-square test.Result A total of 70 cases were enrolled.61 cases were treated with acetaminophen.The success rate (67.2％,41/61) was similar to PRP group (6/9) (P=1.000),and significantly higher than PRP rescue group (6/17) (P=0.017).The complications in acetaminophen group included 22 cases of hyperbilirubinemia (36.1％),5 cases of upper gastrointestinal hemorrhage (8.2％),4 cases of positive fecal occult blood test (6.6％),3 cases of oliguria (4.9％),1 case of Grade Ⅲ ～ Ⅳ intraventricular hemorrhage (IVH) (1.6％),and 1 case of≥ Ⅱ stage necrotizing enterocolitis (NEC) (1.6％).A total of 3 cases of hyperbilirubinemia were in PRP group.One case of hyperbilirubinemia,one oliguria,one Grade Ⅲ～ Ⅳ IVH and one ≥ Ⅱ stage NEC were in PRP rescue group.The urinary PGE2 level in post-treatment was lower than pre-treatment in acetaminophen group (t=6.878,P＜0.001).The blood platelet count and PDGF level in post-treatment were higher than pre-treatment in PRP group (t=-2.496,-8.906;P=-0.037,＜0.001) and PRP rescue group (t=-3.374,-2.503;P=0.004,0.024).Conclusion Oral acetaminophen and PRP transfusion had similar efficacy in promoting the closure of ductus arteriosus in preterm infants.If oral acetaminophen was contraindicated or failed,PRP transfusion could be one of the candidates for rescue therapy to promote the closure of ductus arteriosus in preterm infants.

AIM To study the phenols from Plantaginis Semen.METHODS The 65％ and 95％ ethanol extracts of Plantaginis Semen were isolated and purified by macroporous resin,silica,ODS,Sephadex and preparative column,then the structures of obtained compounds were identified by physicochemical properties and spectral data.RESULTS Nine compounds were isolated and identified as (+)-(7R,7'R,8S,8'S)-neo-olivil (1),erythro-guaiacylglycerol-β-ferulic acid ether (2),eriodictyol (3),luteolin (4),chrysoeriol (5),hydroxytyrosol (6),4-(3,4-dihydroxyphenyl)-(E)-3-buten-2-one (7),ferulic acid (8),5,7-dihydroxychromone (9).CONCLUSION Compounds 2-3,6-7 and 9 are isolated from genus Plantago for the first time,compound 5 is first obtained from this plant.

OBJECTIVE To study the cardiotoxicity of ophiopogonin D′(OPD′) for rat H9c2 cardio? myocytes. METHODS H9c2 cells were exposed to OPD′ 0.1, 1, 5, 10, 20, 25 and 50 μmol·L-1 for 24 h. Cell viability was examined by MTS assay, and the morphological changes in H9c2 cells were quanti? fied. The cell nucleus injury was examined by high content immune fluorescence screening and the morphological changes were observed under a fluorescence microscope. After treatment with OPD′ 0.1, 1, 5 and 10 μmol·L- 1 for 24 h, the effect on reactive oxygen species (ROS), mitochondrial mem? brane potential(MMP) and apoptosis was detected by flow cytometry. RESULTS The viability was sig? nificantly reduced following exposure to OPD′ 0.1, 1, 5, 10, 20, 25 and 50 μmol·L- 1 (P<0.05,P<0.01). The IC50 value was 9.9 μmol ·L- 1 and cell shrinkage and apoptosis occurred. The levels of ROS and apoptosis rate of H9c2 cells were significantly increased after exposure to OPD′ 0.1, 1, 5 and 10 μmol·L-1 for 24 h (P<0.05,P<0.01) and MMP markedly declined (P<0.05,P<0.01). CONCLUSION OPD′ has significent cytotoxicity on H9c2 cells. It may be related to inducing apopotsis pathways.

OBJECTIVE:To investigate the clinical efficacy of alprostadil combined with edaravone in the treatment of unsta-ble angina pectoris(UAP),and their effects on serum oxidative stress indexes,the levels of MMP-2 and MMP-9. METHODS:Be-sides conventional treatment,control group was treated with Alprostadil injection 2 ml added into 0.9% Sodium chloride injection (NS)100 ml,ivgtt,qd;while observation group was additionally treated with Edaravone injection 15 ml added into NS 100 ml, ivgtt,qd. Treatment courses of 2 groups lasted for 2 weeks. The frequency and duration of UAP attack,serum levels of MDA, SOD,TAC,MMP-2 and MMP-9 levels were observed 2 groups;the occurrence of ADR was also observed. RESULTS:There was no statistical significance in frequency of angina pectoris attack,duration,MDA,SOD,TAC,MMP-2 and MMP-9 between 2 groups before treatment (P>0.05). After treatment,the total effective rate of observation group (94.3%) was significantly higher than that of control group(81.4%). The frequency of angina pectoris attack and the level of MDA,were significantly reduced,and the duration of angina pectoris was significantly shortened SOD and TAC increased significantly;the change of observation group was more significant than that of control group with statistical significance(P<0.05). ADR was mild in 2 groups;there was no statisti-cal significance in the incidence of ADR(P>0.05). CONCLUSIONS:Alprostadil combined with edaravone is significantly effec-tive for UAP,reduces the frequency of angina,shortens the duration of angina pectoris,alleviates oxidative stress and reduces se-rum levels of MMP-2 and MMP-9 with good safety.

Objective:To observe the effects of genistein on proliferation and apoptosis of human non -small cell lung cancer cell line A549/DDP.Methods:①MTT assay was applied to evaluate the resistance index of A 549/DDP cell line to cisplatin and half in-hibitory concentration ( IC50 ) .②Inhibition rate of A549/DDP cell proliferation and IC 50 value were evaluated by MTT assay after treat-ment with 0, 1.25, 2.5, 5.0, 10, 20, 40, 60, 80 μg/ml genistein for 48 hour respectively.③A549/DDP cell cycle and apoptosis were evaluated by flow cytometry after treatment with 6.25, 12.5, 25 μg/ml genistein for 24 hours respectively.Results:①In expo-sing to cisplatin, the IC50 of A549 and A549/DDP was 33.6 μmol/L and 76.9 μmol/L respectively.The resistance index was 2.3. Cell growth inhibition rate increased following the cisplatin concentration increasing gradually .②A549/DDP growth inhibition rate in-creased at first and later decreased gradually following treatment with the genistein dose increased .The IC50 of A549 and A549/DDP was about 85.1 μg/ml and 80.2μg/ml respectively.③After treatment with 6.25, 12.5, 25μg/ml genistein for 24 hours, there were more A549/DDP cells arresting and showing apoptosis along with the genistein dose increased .Conclusion: Genistein can inhibit A549/DDP proliferation, cause A549/DDP arresting in G2/M phase and induce A549/DDP cell apoptosis with dose dependently .