Objective To validate if the continuous passive motion instrument we developed is practical and sta- ble for animal experiment.Methods Ten New Zealand male rabbits were used to establish the animal model of full- thickness defect of articular cartilage in the facies patellaris of femur with their both knees.The rabbits were then randomly divided into groups A and B(10 in each group).The rabbits in group A were administered with CPM of both knees daily for 4 weeks,while those in group B remained normal cage activity only.At the end of the treatment,all the animals were sacrificed,and their articular cartilage was harvested for HE staining and observation.Results It was found that group A had a significantly better repair of the full-thickness defects of articular cartilage than that of the group B,as reflected by the range of motion and morphological observation of the knees(P

Objective To evaluate the efifcacy and safety of hemostatics of injected gelatin matrix (HIGM) under the guidance of contrast-enhanced ultrasound (CEUS) for treating splenic trauma in canine model. Methods A total of 24 commercial hybrid dogs underwent celiotomy with creation of uniformly blunt splenic trauma lesion of 4.0 cm×4.0 cm×2.5 cm (length, width and depth, respectively) by hemostatic clamp. Subjects were prospectively randomized into two groups. The treatment group was treated with HIGM under the guidance of CEUS and the positive control group received thrombin solution. Conventional ultrasound and CEUS were performed to record the ascites and the splenic lesion areas at 1st, 3rd, 7th, 14th and 21st day. The ifne needle biopsy and splenectomy were performed for histopathologic examination. The weight, free intraperitoneal lfuid and injury site were compared with t test between HIGM and postive group. Results All animals in two groups survived. All dogs stopped hemorrhage after injection of HIGM under CEUS guidance. The area of injury site was (12.91±0.89) cm2, (4.45±0.75) cm2 and (1.38±0.23) cm2 at 1st, 3rd and 7th day and splenic lesions were not found at 14th and 21st day in all dogs (n=12) of HIGM group. The splenic lesion was (16.74±0.91) cm2, (11.26±0.99) cm2, (8.02±0.82) cm2 and (1.58±0.36) cm2 in the postive group at 1st, 3rd, 7th and 14th day and splenic lesions were not found at 21st day in all dogs (n=12). At 7th and 14th day post-injection, lesion areas were statistically significant between two groups (t=27.162, P=0.008;t=15.129, P=0.001). Free intraperitoneal lfuid was (0.91±0.05) cm at 1st day detected by conventional ultrasound and free intraperitoneal fluid was not found at 3rd, 7th, 14th and 21st day in all dogs (n=12) of HIGM group. The free intraperitoneal fluid in thepositive group was (1.96±0.17) cm, (1.30±0.11) cm and (0.81±0.12) cm at 1st, 3rd and 7th day and free intraperitoneal lfuid was not found at 14th and 21st day in all dogs (n=12). At 1st, 3rd and 7th day post-injection, free intraperatitoneal lfuid was statistically significant between two groups (t=20.934, P=0.003; t=41.310, P=0.000; t=22.520, P=0.000). Histopathological examination showed that there was no foreign body and foreign body granuloma and the structure of red pulp was recovered at 7th, 14th and 21st day. Gross anatomy showed that the splenic injury site was recovered completely without complications. Conclusion This study explored the value of HIGM for splenic trauma and provided a preliminary experimental evidence for clinical treatment.

AlM:To investigate the effects of pirfenidone ( PFD) on the proliferation and transfomring growth factor-β1 ( TGF-β1 ) expression in vitro culture rat corneal stromal cells.METHODS: Corneal stromal cells from 8 to 10wk SD rats were isolated, cultured and treated with different concentrations of PFD 0mg/mL (control group), 0. 15mg/mL (experimental group▏), 0. 3mg/mL (experimental group‖), 1mg/mL (experimental group Ⅲ) for 48h. CCK-8 assay was performed to assess cell proliferation, while immunocytochemistry and Western Blot were used to detect the expression of ki-67 and TGF-β1 expression, respectively. RESULTS: Compared with control group, PFD significantly inhibited the proliferation in a dose -dependent manner ( all P < 0. 05 ), so was protein expression of ki-67. PFD significantly down-regulated the expression of TGF-β1 in a dose-dependent manner (P<0. 05).CONCLUSlON: Pirfenidone can significantly inhibit the proliferation of rat corneal stromal cell by down regulating TGF-β1 expression, therefore, it has potential prospect in lightening the corneal wound healing reaction.

OBJECTIVETo investigate the protective effects of minocycline against hair follicle damage induced by cytosine arabinoside (Ara-c).

METHODSAn in vitro organ culture of mouse vibrissa follicles was used and different concentrations of Ara-c and minocycline were added in the culture media. The total growth length, growth speed and growth period of hair were observed with invert microscopy and the survival of hair bulb cells was measured by MTT method.

RESULTMinocycline (0.3 x 10(-6) approximately 10(-5) mol/L) improved hair follicle total growth length, growth speed and hair growth period and also improved survival of hair bulb cells in vitro organ culture, which were inhibited by Ara-c.

CONCLUSIONMinocycline can protect hair follicle directly from damage induced by Ara-c.

Animals ; Cytarabine ; toxicity ; Dose-Response Relationship, Drug ; Female ; Hair Follicle ; drug effects ; growth & development ; Male ; Mice ; Mice, Inbred C57BL ; Minocycline ; pharmacology

Animals ; Bone Morphogenetic Protein Receptors ; Bone Morphogenetic Proteins ; genetics ; physiology ; Cell Differentiation ; Gene Expression Regulation ; Hair Follicle ; cytology ; embryology ; physiology ; Humans ; Receptors, Growth Factor ; analysis ; Stem Cells ; cytology

OBJECTIVETo investigate the effect of water soluble extracts of traditional Chinese herbs on growth of mouse hair follicles and hair bulb cells in vitro.

METHODSMouse hair follicles and hair bulb cells were cultured in Williams E medium with (experimental groups) or without (control group) water soluble extracts of Chinese herbs; the experimental group was further divided into mixture and single herb groups. Hair growth was observed by microscopy and growth activity of hair bulb cells was detected by MTT colorimetric assay.

RESULTOn day 7 of culture, the hair growth in the mixture groups was faster than that in the control group (P<0.05). On day 3 and 5 of culture, the cell growth activity in the mixture groups was greater than that in the control group (P<0.05). While the hair growth and the cell growth activity between the single herb groups and the control group were not significantly different.

CONCLUSIONThe water soluble extracts of mixed traditional Chinese medicines can promote the growth of mouse hair in vitro and stimulate the proliferation of hair bulb cells; while those of the single traditional Chinese herb have no effect.

Angelica sinensis ; Animals ; Animals, Newborn ; Cell Proliferation ; drug effects ; Cells, Cultured ; Drugs, Chinese Herbal ; pharmacology ; Hair ; drug effects ; growth & development ; Hair Cells, Auditory ; cytology ; drug effects ; Hair Follicle ; drug effects ; Mice ; Mice, Inbred C57BL ; Organ Culture Techniques

To investigate the molecular genetics basis for one para-Bombay phenotype, the red blood cell phenotype of the proband was characterized by standard serological techniques. Exon 6 and 7 of ABO gene, the entire coding region of FUT1 gene and FUT2 gene were amplified by polymerase chain reaction from genomic DNA of the proband respectively. The PCR products were purified by agarose gels and directly sequenced. The PCR-SSP and genescan were performed to confirm the mutations detected by sequencing. The results showed that the proband ABO genotype was A(102)A(102). Two heterozygous mutations of FUT1 gene, an A to G transition at position 682 and AG deletion at position 547-552 were detected in the proband. A682G could cause transition of Met-->Val at amino acid position 228, AG deletion at position 547-552 caused a reading frame shift and a premature stop codon. The FUT2 genotype was heterozygous for a functional allele Se(357) and a weakly functional allele Se(357), 385 (T/T homozygous at position 357 and A/T heterozygous at 385 position). It is concluded that the compound heterozygous mutation--a novel A682G missense mutation and a 547-552 del AG is the molecular mechanism of this para-Bombay phenotype.
ABO Blood-Group System ; genetics ; China ; DNA Mutational Analysis ; Female ; Fucosyltransferases ; genetics ; Genotype ; Humans ; Male ; Mutation ; Mutation, Missense ; Pedigree ; Phenotype ; Sequence Deletion

OBJECTIVETo study the genotype of swines isolated from humans and their relationships with hepatitis E virus (HEV) in the rural areas of southern China.

METHODSSpecimens collected from normal people with HEV-IgM positive, acute hepatitis E patients and from swine in the same area were detected for HEV RNA using RT-nPCR with ORF2 primers. The positive PCR products were cloned and sequenced.

RESULTS13 out of the 132 samples from swine stool, 4 of 26 HEV-IgM positive sera of normal people and 1 of 4 acute hepatitis E patients' stool sample and sera were tested positive for HEV RNA. Data from sequence analysis showed that the identity at nucleotide level was 89.3%-100.0% among the 10 isolates which shared 78.7% - 84.7%, 83.3% - 85.3%, 76.0% - 80.0% and 84.7% - 95.3% nucleotide sequence identity with HEV genotype I, II, III and IV respectively in the region (nt6317- 6466).

CONCLUSIONHEV circulating in humans and swine in the area belonged to genotype IV.

Animals ; China ; Cloning, Molecular ; Feces ; virology ; Genes, Viral ; Genotype ; Hepatitis E ; veterinary ; virology ; Hepatitis E virus ; genetics ; isolation & purification ; Humans ; Immunoglobulin M ; blood ; RNA, Viral ; blood ; Reverse Transcriptase Polymerase Chain Reaction ; Rural Health ; Swine ; Swine Diseases ; virology

OBJECTIVETo detect the expression level of asparagine synthetase (ASNS) in patients with relapsed or refractory extranodal NK/T cell lymphoma and explore its clinical significance.

METHODSTen patients with relapsed or refractory extranodal NK/T cell lymphoma admitted in our department from January, 2013 to January, 2016 were analyzed. The diagnoses were confirmed by pathological and immunohistochemical examination following failed chemotherapies in all cases. Branched DNA-liquidchip technique (bDNA-LCT) was used for detecting ASNS mRNA expression in paraffin-embedded tissue sections in the 10 cases of relapsed or refractory extranodal NK/T cell lymphoma and in 5 cases of chronic rhinitis. The correlations were analyzed between ASNS expression and the clinicopathological features and outcomes of the patients with failed chemotherapy regimens containing asparaginasum.

RESULTSSix out of the 10 patients with relapsed or refractory extranodal NK/T cell lymphoma died due to diseaseprogression. The expression level of ASNS was significantly higher in the lymphoma tissues than in tissue specimens of chronic rhinitis (P<0.05). The expression level of ASNS was associated with the International Prognostic Index (P=0.023) in patients with relapsed or refractory extranodal NK/T cell lymphoma, and Kaplan-Meier curve showed that a high ASNS expression was correlated with a reduced overall survival and progression-free survival of the patients.

CONCLUSIONAsparaginasum-based chemotherapy regimens are recommended for treatment of relapsed or refractory extranodal NK/T cell lymphoma with low ASNS expressions.

Aspartate-Ammonia Ligase ; metabolism ; Disease-Free Survival ; Humans ; Lymphoma, Extranodal NK-T-Cell ; enzymology ; Recurrence

BACKGROUND:An orthodontist can gain all comprehensive data about the tooth and jaw based on a model measurement.With the development of CAD/CAM,a three-dimensional (3D) digital model shows more accurate information than a traditional model.OBJECTIVE:To explore the characteristics of dental arch and basal bone in permanent dentition Angle Class Ⅱ malocclusion based on 3D digital models.METHODS:Thirty cases of normal occlusionin permanent dentition were selected as control group,and 30 cases of Angel Ⅱ1 and 30 cases of Angel Ⅱ2 malocclusion were enrolled,respectively.Three kinds of 3D digital models were established using a 3shape R700 scanner and measured with Orthoanalyzer 2013.The data of individual normal occlusion and Angel Ⅱ1 and Angel Ⅱ2 data were analyzed statistically with SPSS 19.0 software respectively.Intergroup comparison was analyzed by the least significant difference test method.RESULTS AND CONCLUSION:Maxillary and mandibular dental arch length and maxillary dental arch width of front section (3-3) and middle section (4-4)/maxillary basal bone length and mandibular basal bone width of middle section (4-4):Ⅱ2 ＞ normal occlusion ＞ Ⅱ1 (P ＜ 0.05).Mandibular dental arch front width of section (3-3)/maxillary and mandibular basal bone length:normal occlusion ＞ Ⅱ1＞ Ⅱ2 (P ＜ 0.05).Maxillary dental arch width of behind section (6-6)/maxillary basal bone width of front section (3-3) and middle section (4-4)/mandibular basal bone width of front section (3-3):normal occlusion ＞ Ⅱ2 ＞ Ⅱ1 (P ＜ 0.05).The angle of tooth long axis and plane:there was significant difference in the Angel Ⅱ1,Ⅱ2 and normal occlusion (P ＜ 0.05).Maxillary posterior-teeth area (coronary):Ⅱ1 ＞ Ⅱ2 ＞ normal occlusion (P ＜ 0.05).Mandibular posterior-teeth area (coronary):Ⅱ2 ＞ normal occlusion ＞ Ⅱ1 (P＜ 0.05).The dental arch of Angel Ⅱ1 was narrow and long in shpape,and the dental arch of Angel Ⅱ2 was wide and short in shape.Sagittal discordant existed in the anterior of Angel Ⅱ1,such as lip-side incline of maxilla and mandible.Coronal discordant existed in the median and posteior of Angel Ⅱ1,such as palatine-side incline of the maxillary dental arch,and buccal-side incline of the mandible.Sagittal discordant existed in the anterior of Angel Ⅱ2,e.g.lingual-side incline of the maxilla and mandible.No discordant existed in the posterior section of Angel Ⅱ2.