BACKGROUND: The mitochondrial DNA with multiple copy number, maternal inheritance, high mutation rate, restructuring and other rare features, has important significance at levels of molecular ecology, molecular genetics, forensic and anthropological research.OBJECTIVE: To comprehensively analyze mitochondrial DNA in the development of research methods, and to explore the application of anthropological research.METHODS: With the key words of mitochondrial DNA, polymorphism, and haplogroup in English, a computer-based online search was conducted in Pubmed database from January 1999 to April 2009. Anthropology relevant articles were included, but animal experiments were excluded.RESULTS AND CONCLUSION: Among the first inspection of 235 documents, 33 met the inclusion criteria. Mitochondrial DNA characterized by multiple copy number, maternal inheritance, high mutation rate, and very few re-occurring features, thus by analyzing the scope and frequency of information, it could be used to infer the relationship between the different populations, as well as the reconstruction of mass incidents. Mitochondrial DNA variation information extraction method had experienced low RFLP, high-resolution RFLP, sequencing and RFLP and sequencing of hypervariable region. Mitochondrial DNA polymorphisms played an important role in interfering phylogenetic relationships, different groups of national origin and migration routes.Mitochondrial DNA database of various groups around the world did not restrict the full application in anthropology. Mathematical statistical model which was used to improve existing, build and enrich various groups of mitochondrial DNA database all over the world is the main direction for future research. Mitochondrial DNA is significance in molecular ecology, molecular genetics, forensic science and anthropology, as well as the study of tissue engineering, especially in the study of human origins and comparative phylogenetic relationships of different populations.

Objective:To determine the mechanism of sunitinib-induced autophagy in renal cell carci-noma cells.Methods:MTS assay was applied to detect the cell viability alteration under the treatment of sunitinib (2,8 μmol /L).The sunitinib-induced autophagy as well as cell apoptosis was measured and compared after knocking down autophagy-related protein Beclin1 and microtubule associated protein 1 light chain 3 fusion protein (LC3)by RNA interference.The transmission electron microscope was used to observe the formation of autophagosomes in ACHN cells.The fluorescence microscope was used to mo-nitor distribution and aggregation of endogenous LC3-Ⅱ.The expressions of protein such as LC3-Ⅱ,the autophagic regulation molecules protein kinase B /mammalian target of rapamycin (Akt/mTOR)and the symbol of apoptosis poly ADP-ribose polymerase (PARP)were capable to be detected by immunoblotting assay.Results:Sunitinib was able to significantly trigger cell viability loss in the renal carcinoma cell ACHN,which was both in a concentration-dependent and time-dependent manner (P <0.05 ).After reducing the autophagy by knocking down Beclin1 and LC3,the number of cleavage of PARP was in-creased remarkably,whereas there was nearly not any cleavage in the mock group.By the transmission electron microscope,there were more autophagic vacuoles in ACHN cells after being administrated with sunitininb compared with the control.And the nuclear-to-cytosol translocation as well as aggregation of LC3-Ⅱ was presented after sunitinib treatment by the fluorescence microscope,which was the proof of the enhanced autophagy.According to the immunoblotting,sunitinib was able to increase the accumula-tion of LC3-Ⅱ.At the same time,the result of sunitinib combined with chloroquine,a drug which blocked the fusion of autophagosomes and lysosomes,demonstrated that the increasing amount of LC3-Ⅱwas due to the enhanced autophagy flux by sunitinib treatment in ACHN cells.However,phosphorylation of Akt as well as mTOR was decreased at the same time.The rapamycin (mTOR inhibitor)or knocking down Akt subunits could change the sunitinib-induced LC3-Ⅱ accumulation,whereas overexpression of Akt subunits decreased the autophagic flux,indicating that Akt/mTOR was the target of sunitinib in auto-phagy.Conclusion:Sunitinib induced autophagy via suppressing Akt/mTOR pathway,and the auto-phagy was involved in apopotosis.

Objective To study the effect of glutamine on hypermetabolism reaction and hormone secretion after severe burn injury. Methods Eighty-eight Wistar rats were inflicted with 30% total body surface area full thickness burns and randomly divided into two groups: namely burned control (B) and glutamine treatment(GLN) group. There was isonitrogenous and isocaloric intake in both groups, and rats of GLN and B groups were given glutamine and glycine at 1 0g/kg d, respectively. The following indices including the resting energy expenditure (REE), the levels of plasma cortisol, insulin and glucagon were determined. Results After burn injury, the REE, plasma cortisol,insulin and glucagons levels were significant increased in both groups. Compared with B group, the level of REE decreased and the ratio of insulin/glucagons increased in GLN group. Correlation analyses showed that REE had a negative correlation with insulin/glucagons ratio (r=-0 78,P

OBJECTIVE: To investigate the pharmacokinetics of 10 mg adefovir dipivoxil tablet formulations in 12 Chinese healthy subjects after a single dose and multiple doses. METHODS: A single dose and multiple doses of the formulations of adefovir dipivoxil tablets were given to each of 12 healthy male subjects. The concentrations of adefovir in plasma were determined by LC-MS/MS. The pharmacokinetic parameters were calculated by DAS2.0 programme. RESULTS: The obtained pharmacokinetic parameters of adefovir following adefovir dipivoxil tablets in a single dose and multiple doses group were as follows: ρmax were (24 ± 9), (24 ± 8) μg · L-1; AUC0-24 h were (210 ± 54), (213 ± 73) μg · h · L-1; AUC0-∞ were(236 ± 64), (250 ± 90) μg · h · L-1; t1/2 were (7.4 ± 1.2), (8.5 ± 2.1)h; tmax were (1.3 ± 0.7), (1.5 ± 0.6) h, respectively. Other main parameters in multiple doses group were ρavss (8.90 ± 3.06) μg · L-1 and DF (2.52 ± 0.66). CONCLUSION: There was no significant difference in pharmacokinetic parameters between single dose and multi-dose group. There is no accumulation following multiple doses of adefovir dipivoxil. Adefovir dipivoxil tablets were safe and well tolerated in Chinese subjects. Copyright 2012 by the Chinese Pharmaceutical Association.

Objective To explore the effect of immunogenicity of freeze-dried bone allograft on different in vitro experimental models. Methods The lymphocytes were obtained respectively from 10 healthy young human volunteers, 10 Balb/c and 10 C57 mice and 10 New Zealand rabbits. The experiment was carried out in 6 groups: positive control group (PHA/ConA+lymphocyte), negative control group (Hydroxyapatite powder + lymphocyte), allogeneic bone group A (Freeze-dried bone powder 2. 0 g/L + lym-phocyte), allogeneic bone group B (Freeze-dried bone powder 1.0 g/L + lymphocyte), allogeneic bone group C (Freeze-dried bone powder 0.5 g/L + lymphocyte), and negative control group (culture solution + lym-phocyte). Lymphocyte transformation test (Alamarblue) was conducted to culture the 6 kinds of experimental materials in vitro. After 72 hours, samples were scanned with ELISA muhiscan at wave lengths 570 nm and 600 nm to fetal the light absorption value. Pearson analyses were performed 10 determine the relationships a-mong the 3 animals and 1 human groups and find out which animal would be highly correlated to human. Results In the human and Balb/c mice lymphocyte transformation tests, there was no significant difference (P > 0.05) between allogeneic bone groups A, B, C and negative control group (HA) ; but there was sig-nificant difference (P < 0.001) between allogeneic bone groups A, B, C and positive control group (PHA/ConA); there was no significant difference between the 3 allogeneic bone groups (P > 0.05). There was no significant difference among the 6 groups of C57 mice and New Zealand rabbits (P > 0.05). The coefficient r between Balb/c mice and human groups was 0.959, P = 0.003, showing a highly positive correlation. The coefficient r between C57 mice and human groups was 0.527, P = 0.283, while the coefficient r between New Zealand rabbits and human groups was 0.866, P =0.026. Conclusions The immunogenicity of freeze-dried bone powder in this experiment may not be sufficient enough to induce significanrt immunologic response. Balb/c mice may be preferable for immunogenicity related experiments.

Anthracosis ; complications ; Bacterial Proteins ; genetics ; Humans ; Methicillin Resistance ; genetics ; Methicillin-Resistant Staphylococcus aureus ; drug effects ; genetics ; Penicillin-Binding Proteins ; Respiratory Tract Infections ; complications ; microbiology ; Sputum ; microbiology

0.05).However,metabolic acidosis and hyperchloremia were observed with feeding arginine hydrochloride for 7 days in severe burned rabbits,and no such significant changes were found in arginine acetate group.CONCLUSION:Arginine acetate is safer than arginine hydrochloride in severe burned rabbits.

Objective To explore the risk factors for intracranial hemorrhage caused by late vitamin K deficiency bleeding(VKDB),in order to prevent and reduce the incidence of intracranial hemorrhage caused by late VKDB.Methods A retrospective analysis of the risk factors of late VKDB and intracranial hemorrhage was applied to 2 groups of patients in PICU and department of neurology of Beijing children's Hospital from Jan.2002 to Dec.2007.In group Ⅰ,there were 90 patients suffering from intracranial hemorrhage caused by late VKDB;while in group Ⅱ,there were 23 patients of late VKDB without intracranial hemorrhage.Within 12 hours of hospitalization,the following 9 items were checked:the cranial CT,blood calcium concentration,liver function,serum sodium,blood glucose,prothrombin time,partial thromboplastin time,fibrinogen concentration,and platelet.Ten possible relevant risk factors of gender,age,birth situation,feeding patterns,recent diarrhea,cytomegalovirus(CMV)infection,hypocalcemia,dysglycemia,hyponatremia,and abnormal liver function were analyzed by the method of non-conditional Logistic regression analysis.Results Statistically significant difference had been found in the 3 factors of hypocalcaemia,recent diarrhea,abnormal liver function(Pa

Objective:To compare and analyze the ultrasonic images between intestinal involvement in Kawasaki disease (IIKD) and abdominal type allergic purpura (ATAP), so as to improve the understanding of IIKD.Methods:From July 2014 to January 2020, the ultrasonographic images of 21 children with IIKD and 24 children with ATAP in Tianjin Children′s Hospital were collected and analyzed.Results:Univariate analysis showed that there were significant differences between IIKD group and ATAP group in non stratified thickening of intestinal wall, decreased echo of serosa and adjacent mesentery (irregular shape), thickening of peripheral fat tissue and abnormal shape of adjacent lymph nodes (all P<0.05); Multivariate analysis showed that decreased echo of serosa and adjacent mesentery (irregular shape) were independent influencing factors of IIKD. The area under ROC curve was 0.914(95% CI=0.819-1.000, P<0.001). The sensitivity and specificity of IIKD were 95.2% and 87.5%, respectively. Conclusions:The ultrasonographic images of intestinal involvement in IIKD and ATAP have certain specificity. Decreased echo of serosa and adjacent mesentery (irregular shape) can effectively distinguish IIKD and ATAP.

Nipple discharge is one of main symptoms about breast disease.Furthermore,the haematodes nipple discharge is earlier clinical manifestation of breast duct cancer.How to make diagnosis about the dis-ease of nipple discharge better,especially the early diagnosis of breast duct cancer,is the responsibility of breast specialists.There are several usual examinations about breast,but they are below the mark about some breast disease which have no lump or have minimal changes.Whole breast ultrasonic scanning and breast ultrasound computer-assisted diagnose system make the diagnosis of the disease of nipple discharge better than before in recent years.3D-reestablishment of this diagnose system can make doctor conveniently observe the disease in spatial position and know the relationgshep between disease and peripheric tissue.In this way,doctor can definit the property of disease more exactly and make early diagnosis of breast tumor more easier.