Equipment Design ; Facial Injuries ; therapy ; First Aid ; instrumentation

Adenomatous Polyposis Coli Protein ; genetics ; Chromatography, High Pressure Liquid ; methods ; Codon ; genetics ; DNA Mutational Analysis ; Fibromatosis, Aggressive ; genetics ; pathology ; Humans ; Mutation ; Polymerase Chain Reaction ; beta Catenin ; genetics

0.05).Conclusion The result suggests that T1 locus genetic polymorphism is weakly associated with asthma.

Cartilage ; diagnostic imaging ; Ectodermal Dysplasia ; diagnosis ; Humans ; Radiography

OBJECTIVETo explore the role of abnormalities of chromosome 8, APC and beta-catenin genes in tumorigenesis of aggressive fibromatosis.

METHODSTrisomy 8 was detected by interphase fluorescence in situ hybridization (FISH). The APC gene and beta-catenin gene mutations were detected by denaturing high performance liquid chromatography (DHPLC) and direct sequence analysis after the PCR transition.

RESULTSThe rate of trisomy 8 in recurrent tumors (62.5%, 5/8) was significantly higher than that in the primary tumors (8.3%, 1/12). Somatic substitution of APC gene was found in 18 of 69 (26.1%) aggressive fibrometases. Somatic transition of beta-catenin gene was detected in 13 of 69 (18.8%) and mutation at codon 41 in exon 3 involving threonine residues implicated in the degradation of beta-catenin. The abnormal expression of beta-catenin had no significant correlation with the mutation of APC or beta-catenin gene. The group with positively expressed beta-catenin protein showed a significant higher c-myc protein expression than those without (P = 0.001). The Ki-67 index was extremely low in all the lesions. The apoptosis index (AI) of the groups with positively expressed c-myc and cyclin D1 showed significantly lower AI than those without.

CONCLUSIONTrisomy 8 may serve as a useful predictor of recurrence in aggressive fibromatosis. There are somatic mutations of the APC and beta-catenin genes in the aggressive fibromatosis, and there are abnormalities in the Wnt signaling pathway. These abnormalities may result in the aberrances of cell proliferation and apoptosis, which are likely to be import factors in the tumorigenesis.

Adenomatous Polyposis Coli Protein ; genetics ; metabolism ; Apoptosis ; Chromosomes, Human, Pair 8 ; Cyclin D1 ; metabolism ; Fibromatosis, Aggressive ; genetics ; metabolism ; pathology ; Genes, APC ; Humans ; Ki-67 Antigen ; metabolism ; Neoplasm Recurrence, Local ; Point Mutation ; Proto-Oncogene Proteins c-myc ; metabolism ; Signal Transduction ; Trisomy ; Wnt Proteins ; metabolism ; beta Catenin ; genetics ; metabolism

Mycoplasma hyopneumoniae (M .hyopneumoniae) and Mycoplasma hyorhinis (M .hyorhinis) infections are common in China .To investigate the prevalence of M .hyorhinis and M .hyopneumoniae in Jiangsu Province of China ,a mo-lecular epidemiological survey was conducted from 399 nasal swab samples of unvaccinated pigs using nested Polymerase Chain Reaction (nested PCR) .Nasal swab samples were collected from Jiangquhai porcine lean (JQHPL) strain pigs and other West-ern breeds .Clinical samples were taken from each pig and divided into different groups based on ages of pigs (7 ,14 ,21 ,28 , and 35 days) .Results indicated that the prevalence of M .hyorhinis was 70 .9% from different herds in Jiangsu Province in China ,while the prevalence of M .hyopneumoniae was 13 .5% .M .hyorhinis infection was more common in pigs for less than 5 weeks of age compared to M .hyopneumoniae infection .Co-infection was also observed in 30 samples (7 .5% ) in which both M .hyorhinis and M .hyopneumoniae were detected .The M .hyorhinis infection increased as the animals grew from 7 to 35 days .The M .hyopneumoniae infection did not change significantly as the pigs grew older .Significant difference of M .hyorhi-nis infection was observed between other Western breeds and JQHPL pigs (P<0 .001) .JQHPL pigs appear to be more sensi-tive to the M .hyorhinis infection as compared to the other Western breeds .However ,there is no obvious relationship between the breed type and M .hyopneumoniae infection (P>0 .05) .

OBJECTIVETo investigate the effects of hydroquinone (HQ) on expression of Polymerase eta (Pol eta) and DNA damage in human hepatic cells (L-02), and to explore the role and possible mechanism of Pol eta involved in the process of DNA damage-tolerance.

METHODSAfter L-02 hepatic cells were exposed to HQ with various concentrations (0, 5, 10, 20, 40, 80 and 160 micromol/L) for 24 h, cell survival rate was detected by MTT assay; DNA impairment was detected by single cell gel electrophoresis (SCGE); Real-time fluorescent quantitative PCR and Western blotting methods were used to measure the expression of Pol eta at the mRNA and protein level in L-02 hepatic cells exposed to HQ with various concentrations (0, 5, 10, 20, 40, 80 and 160 micromol/L).

RESULTSMTT assay showed that HQ with concentrations from 0 to 80 micromol/L had little effect on the survival rate of L-02 (P>0.05); whereas the survival rate of the group of 160 micromol/Lwas significantly higher than that of the control (P<0.01) after being treated with HQ for 24 h; the higher dose of HQ presented, the more degrees of DNA damage were produced. It was found that HQ in a low concentration (1-80 micromol/L) could induce the expression of Pol eta which was in proportion to the increasements of HQ concentration; the expression levels of mRNA and protein were reached to the maximum when treated with 80 micromol/L; the expression of Pol eta decreased (the relative quantity values were 2.32 +/- 0.16 and 1.20 respectively) once the concentration of HQ exceeded 160 micromol/L as compared with the group of 80 micromol/L, but it was higher than that of the control.

CONCLUSIONThis study suggested that Pol eta might involve in the process of DNA damage-tolerance induced by HQ in the hepatic cells.

Cell Survival ; drug effects ; Cells, Cultured ; DNA Damage ; drug effects ; DNA Repair ; DNA-Directed DNA Polymerase ; metabolism ; Hepatocytes ; drug effects ; metabolism ; Humans ; Hydroquinones ; adverse effects ; Mutagens

Adolescent ; Adult ; Aged ; Aged, 80 and over ; Chromosome Aberrations ; Chromosomes, Human, Pair 8 ; Female ; Fibromatosis, Aggressive ; genetics ; Humans ; In Situ Hybridization, Fluorescence ; Male ; Middle Aged

OBJECTIVETo study the clinicopathological and genetic features of desmoid-type fibromatosis, and to investigate the feasibility of detecting trisomy 8 in formalin fixed, paraffin embedded (FFPE) tissue by fluorescence in-situ hybridization (FISH).

METHODSA total of 96 cases were included in this study. All patients had clinical information. Histopathologic and immunohistochemical evaluations were available in 69 cases, and ultrastructural evaluation was done in 2 cases of desmoid-type fibromatosis. FFPE tissue sections were available in 20 tumors for the trisomy 8 detection by FISH.

RESULTSThere were 20 male and 76 female patients with ages ranging from 8 to 86 years (mean 35.3 years). Clinically, there were 44 extra-abdominal tumors, 28 abdominal wall tumors and 23 intra-abdominal lesions mostly involving the mesentery. Most cases presented with nodular or funicular masses with white firm cut surfaces, measuring 0.6 to 24.0 cm (mean 8.4 cm) in size. Histologically, desmoid-type fibromatoses showed longitudinal fascicles of spindle fibroblasts and myofibroblasts in a predominantly collagenous background. The tumor cells stained positive for vimentin, alpha-smooth muscle actin, desmin, and beta-catenin (47.8%, 33/69). Ultrastructurally, most tumor cells had features of fibroblasts, including rich endoplasmic reticulum and Golgi apparatus. Some tumor cells were myofibroblast-like cells exhibiting intercellular junctions, fibronexous junctions and stress fibers. Trisomy 8 was detected in 6 of 20 cases of desmoid-type fibromatosis including 5 of the 8 recurrent tumors but only one of the 12 primary tumors. The latter tumor also recurred three years later.

CONCLUSIONSDesmoid-type fibromatosis is an intermediate (locally aggressive) tumor that occurs predominantly in young females. The lesion consists of fibroblasts and myofibroblasts with the latter showing characteristic features including stress fibers and fibronexous junctions. Trisomy 8 can be detected in FFPE tissue by FISH, and its presence serves as a useful predictor of tumor recurrence and may define a subtype of desmoid-type fibromatosis with high recurrence rate.

Actins ; analysis ; Adult ; Aged ; Aged, 80 and over ; Child ; Chromosomes, Human, Pair 8 ; genetics ; Desmin ; analysis ; Feasibility Studies ; Female ; Fibromatosis, Abdominal ; genetics ; metabolism ; pathology ; Fibromatosis, Aggressive ; genetics ; metabolism ; pathology ; Humans ; Immunohistochemistry ; In Situ Hybridization, Fluorescence ; Male ; Mesentery ; Middle Aged ; Muscle, Smooth ; chemistry ; Neoplasm Recurrence, Local ; Peritoneal Neoplasms ; genetics ; metabolism ; pathology ; Trisomy ; Vimentin ; metabolism ; beta Catenin ; analysis

Adult ; Aged ; Female ; Hemangiosarcoma ; diagnostic imaging ; Humans ; Liver Neoplasms ; diagnostic imaging ; Male ; Middle Aged ; Tomography, X-Ray Computed