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Objective To study the postmortem distribution of Bromadiolone and its metabolite-Benzylideneacetone in dogs and provide an experimental evidence for the sampling of Bromadiolone poisoning cases. Methods The dogs were given 2LD50 and 4LD50 Bromadiolone by intragastric administration. Anatomy was conducted immediately after death and samples of body fluids and viscera (heart blood; peripheral blood, bile, urine, heart, liver, spleen, lung, kidney, brain, urinary bladder, left leg muscle, stomach, stomach contents, pancreas) were collected and detected after the dogs poisoning death. The Bromadiolon and its metabolite-Benzylideneacetone contents in samples were analyzed by GC/MS. Results Hemorrhagic symptoms came out at 3d after Bromadiolone delivery and deaths occurred at (178.40±20.94)h after intoxication. The postmortem distribution of Bromadiolon and its metabolite-Benzylideneacetone in dogs was as following: 2LD50 Bromadiolon: bile>urine, liver, heart, kidney>heart blood, peripheral blood, spleen, lung and so on. Benzylideneacetone: the content in bile, urine, heart blood, peripheral blood, lung, stomach contents are higher. 4LD50 Bromadiolon: bile, urine>liver, peripheral blood>heart blood, stomach contents and others. Benzylideneacetone:contents in bile, urine and lung are higher. Conclusion The postmortem distribution of Bromadiolon and its metabolite-Benzylideneacetone in dogs is uneven, contents in bile, urine, liver, heart blood and peripheral blood are higher, whichare suggested for forensic toxicological analysis in Bromadiolon poisonig case.
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Objective To develop a method of support liquid-liquid extraction (SLE) and simultaneous determination of 4 components in somedon and its 8 metabolites by GC–MS/MS. Methods Somedon and its metabolites were extracted by SLE and determined by GC-MS/MS in MRM mode. The qualitative analysis was based on retention time and ratio of ions. The quantitative analysis was based on internal standard method and calibration curve. Results After SLE and determination of 4 components in somedon and its 8 metabolites, the extraction rate were 37.57%~95.87%, the linear range were 0.12μg/mL~16.00μg/mL, the correlation coefficient(r)were 0.989 6~0.999 7, LOD were 0.08ng/mL~14.48ng/mL, the accuracy were 79.63%~122.90%, the interday and intraday precision were 0.99%~7.43% and 2.19%~10.60% respectively. Conclusion Simultaneous determination of somedon and its metabolites by GC–MS/MS in biological samples, which was rapid, simple, accurate and was high precision and recovery, can be used for qualitative and quantitative analysis in forensic cases.
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Objective Study on the stability of carbofuran and its metabolite carbofuran phenol in blood preserved at different conditions,in order to provide a scientific evidence for forensic identification of carbofuran poisoning death. Methods The dogs were given intragastric administration with 4LD50(13.5mg/kg) of carbofuran, the blood were collected and divided into five equally groups preserved at 20℃(NC2.5mg/mL), 20℃(1%NaF), 20℃, 4℃ and -20℃, respectively. The concentrations of carbofuran and carbofuran phenol in above samples were detected by GC-MS/MS with MRM at 0d、5d、7d、15d、40d、83d and 150d. Results The concentration of carbofuran in preserved blood were found to be significant decrease at 7d(P < 0.05), then a steady decline. In each condition, the concentration of carbofuran phenol in preserved blood showed an increasing trend firstly, then a declined tendency. The concentration of carbofuran and carbofuran phenol descending fast in blood at 20 ℃ (NC) and 20 ℃ (1%NaF).Conclusion Carbofuran and carbofuran phenol in preserved specimens are found to be decomposed. The decomposition is quick at 20℃ and slow at -20℃. Citrate sodium and sodium fluoride are not suit for anticoagulation and antiputrefactiva. Biological specimens used for forensic identification of the carbofuran poisoning should be stored at refriferated or freezed, and be analyzed as soon as possible.
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Objective To explore the clinical application value of three-dimensional reconstruction of maxillary canine pulp volume /tooth volume (PV/TV)in individual gender determination.Methods There were 103 patients (51 males and 52 females) with CBCT imaging data from September 2015 to August 2016, Shanxi Medical University, department of radiology, Mimics 17.0 software was used to measure pulp volume of maxillary canines and tooth volume, and to calculate the ratio of pulp volume/tooth volume.The data were processed by SPSS16.0 statistical software and Fisher discriminant method. The gender determination function was obtained and Cross -Validated method for performance evaluation. Results When gender determination was determined by tooth volume (TV) and pulp volume/tooth volume (PV / TV) as the study index, the gender discriminant function was Y=0.009(TV)+28.896(PV/TV) - 6.962, Cross-validated method for the effect of evaluation, to determine the compliance rate: 51 males, the correct rate of 64.7%;52 female, the correct rate of 78.8%. Conclusion The tooth volume (TV) and pulp volume/tooth volume (PV/TV)can be used as a research indicator of gender inference, it provides a new method and avenue for the gender determination in forensic medicine.
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Objective To study the toxicokinetics of Cymermethrin and its metabolites in dog bile and provide evidence for forensic cases of identification of Cymermethrin poisoning. Methods 1/4LD50 doses of Cymermethrin were given to 6 male dogs by oral perfusion after the gallbladder fistula surgery on them,and their bile were collected at different time, in which Cymermethrin and its metabolites were extracted by Liquid-liquid extraction with dichloromethane and detected by HPLC-MS-MS. The qualitative analysis was based on retention time and MRM ions. The quantitative analysis was based on an internal standard method and calibration curve. Toxicokinetics equations of Cymermethrin and its metabolites in the bile were established from the c-t curves which were fitted by the WinNonlin toxicokinetics software meanwhie toxicokinetics parameters were obtained. Results The toxicokinetics of Cymermethrin met first-order dynamic equation. The Tmax of Cymermethrin(CYM), 3-phenoxybenzoic acid (3-PBA), 3-(2,2-Dichloroethenyl)-2,2-dimethyl-cyclopropanecarboxylate (DCVA) respectively were 1.52±0.30,1.29±0.04,0.93±0.41 h ; The Cmax of CYM, 3-PBA, DCVA respectively were 0.38±0.03,7.9±1.32,30.9±16.24 μg/mL ; The T1/2 of CYM, 3-PBA, DCVA respectively were3.93±0.71,1.36±0.11,4.49±2.81 h; Conclusion The toxicokinetics of Cymermethrin in dog bile met first-order dynamic equation ; The toxicokinetics model and parameters of Cymermethrin can provide evidence for forensic identification of Cymermethrin poisoning cases.
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Objective To investigate the effect of conventional preseratives on the stability of carboxyhemoglobin(HbCO)in the stored blood samples.Methods Blood samples with 30%～40% and 60%～70% of HbCO were established,respectiviely.The samples were stored with the commomly used preseratives including formaldehyde,sodium fluoride,EDTA-Na_2,sodium nitrite,potassium oxalate,heparin sodium,sodium citrate and the mixture of sodium fluoride and sodium citrate(1:3).Saturation of HbCO in the preserved blood samples were determined at 0h,2h,8h,24h,3d,and 7d after treatment with the addictives,respectively.The data were evaluated statistically.Results The stability of HbCO was significantly affected in the formaldehyde and sodium nitrite-treated samples,but no significant effects of the other preseratives on the blood samples were detected.Conclusion The stability of HbCO in the blood samples conserved varies with the type of the preseratives used.The samples taken from cases with suspected death from carbon monoxide poisoning should be kept with proper preseratives.Blood samples preserved with formaldehyde and sodium nitrite are not suitable for HbCO determination.
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AIM: To investigate the effect of LPS on phagocytosis of Kupffer cells in vitro. METHODS: Isolated Kupffer cells were treated with LPS in vitro . The phagocytosis, microfilament, microtubules and apoptosis of Kupffer cells were determined by the beads phagocytosis test, fluorescence staining, fluorometry and flow cytometric analysis. RESULTS: LPS enhances the phagocytosis, actin content, microtubules fluorescence density of Kupffer cells in vitro , while at a large dose or for a long time, it lessened the phagocytosis increasing or phagocytosis, inhibites the microfilament and microtubules expression, and induced apoptosis. CONCLUSION: LPS enhances the phagocytosis of Kupffer cells in vitro , but in large amount, it inhibites the phagocytosis of Kupffer cells, which is probably related to LPS -induced microfilament, microtubules expression changes and apoptosis in Kupffer cells.
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The pharmacokinetics of morphine in rats was studied after treatment with morphine, as well as morphine and lofexidine. The results showed that in lofexidine group the T 1/2ka and CL of morphine was significantly increased, while the C max ,AUC and T 1/2k of morphine were significantly decreased. Our results indicate that the lofcxidine can reduce the absorption rate of the morphine and the concentration of morphine in blood, and then can increase the total clearance rate of morphine in rats.
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A qualitative and quantitative analysis of alprazolam in biological samples by TLC scan is described in this paper. The distribution of alprazolam in poisoned rabbits was studied. It is showed that 4 hours after a dose of 21mg/kg, the concentration of the drug in liver, spleen, kidney; lungs, heart,brain, blood,bile and urine of poisoned rabbits were 19. 6 ? 6. 1, 3.31?0. 5, 3. 5? 0. 3, 0. 4? 0.1, 0. 4 ?0. 1, 1. 6 ? 1. 8, 4. 0 ? 1. 3, 20. 4 ? 8.0 and 8. 6 ? 2. 4ug/ml. Alprazolam is not well-distributed in poisoned rabbits. Blood, bile, urine and liver are better samples for analysis of alprazolam poisoning victim.