The basic mechanical properties of a Radial Shock Wave Therapy Equipment (RSWTE) were experimentally studied in this paper. The output energy of the RSWTE working on the operation frequency of 10 Hz was measured by dynamic pressure transducer under the conditions of different operation pressure. The results showed that both operation pressure and operation frequency have effects on the output energy of the equipment. The output energy increases with the increase of operation pressure, and the magnitude of increased energy decreases with higher operation of frequency. With the increase of operation frequency, the output energy rises up in condition of lower operation pressure and drops off in condition of higher operation pressure. The accurate medical treatment should be selected with the optimized energy and condition according to the treatment requirement to different illness in clinical medical applications.
Equipment Design ; High-Energy Shock Waves ; Physical Therapy Modalities ; instrumentation ; Pressure

BACKGROUNDPrevious studies have compared single-photon emission computed tomography (SPECT) and electron beam computed tomography (EBCT) in detection of coronary artery disease (CAD) in patients with myocardial infarction (MI). The purpose of this study was to compare SPECT with EBCT in detection of CAD in patients with no MI.

METHODSOne hundred and forty-seven patients with suspected CAD underwent stress-rest (99)mTc-methoxyisobutylisonitrile ((99)mTc-MIBI) myocardial SPECT, cardiac EBCT and coronary angiography (CAG) within one month. Of them, 73 patients (aged 52.6 +/- 10.6 years old) with no history of MI were included in this study. Coronary artery calcium (CAC) was defined as a CT value >or= 130 HU within the boundary of coronary artery on EBCT.

RESULTSThere were 35 and 38 patients with or without CAD according to CAG. Ninety-six percent of the patients with abnormal SPECT and CAC had a coronary arteries stenosis >or= 50%, and 90.9% patients with normal SPECT and EBCT showed no CAD. The sensitivity of SPECT and EBCT in detection of CAD was comparable, and the specificity of SPECT (92.1%) was significantly higher than that of EBCT (55.3%) (P < 0.005). For the detection of individual coronary artery stenosis, both sensitivity and specificity of SPECT (75.0% and 93.7%) were significantly higher than those of EBCT (53.3% and 76.7%) (P < 0.025 and P < 0.005, respectively). In patients without chest pain, the sensitivity and specificity of SPECT (76.9% and 91.4%) were significantly higher than those of EBCT (23.1% and 69.0%) in detection of a coronary artery stenosis of >or= 50% (P < 0.01 and P < 0.005, respectively). However, in patients with chest pain, both sensitivity and specificity of SPECT were comparable to those of EBCT. In patients or= 50% (P < 0.005), and the specificity of SPECT was comparable to that of EBCT. In patients > 45 years old, the specificity of SPECT (94.3%) was significantly higher than that of EBCT (70.5%) (P < 0.005), and the sensitivity of SPECT was comparable to that of EBCT.

CONCLUSION(99)mTc-MIBI myocardial perfusion SPECT has higher accuracy than that of EBCT in detection of CAD in patients without MI.

Adult ; Age Factors ; Aged ; Calcium ; blood ; Chest Pain ; diagnostic imaging ; Coronary Disease ; diagnostic imaging ; Coronary Vessels ; chemistry ; Heart ; diagnostic imaging ; Humans ; Middle Aged ; Sensitivity and Specificity ; Technetium Tc 99m Sestamibi ; Tomography, Emission-Computed, Single-Photon ; Tomography, X-Ray Computed

Wound combined with total body irradiation (TBI) injury results in impairment of tissue repair and delayed processes of healing, so it has been considered as an important and representative model of impaired wound healing, but the mechanism is not fully clarified. Fibroblasts in wound are the most important cells participating in tissue repair, whereas its radiosensitivity is not high. To understand whether TBI injury has direct damaging effects on fibroblasts in wound, fibroblasts in wound combined with TBI injury and in wound of simple incision injury were isolated and cultured, and parameters associated with tissue repair were determined. The results showed that the abilities of proliferation, attachment and adhesion of fibroblasts isolated from wounds combined with TBI injury significantly decreased as compared with those of simple incision injury, nevertheless, apoptotic ratio of fibroblasts isolated from wounds combined with TBI injury increased significantly. These data suggest that TBI injury may cause direct damaging effects on fibroblasts in wounds, which might be one of the dominant reasons for impairment of wound healing when it is combined with TBI injury.
Animals ; Disease Models, Animal ; Fibroblasts ; metabolism ; physiology ; radiation effects ; Radiation Injuries, Experimental ; metabolism ; Rats ; Rats, Wistar ; Skin ; injuries ; Whole-Body Irradiation ; Wound Healing ; physiology

Background Leber hereditary optic neuropathy (LHON)is a common inherited eye disease,which generally affects young adults with bilateral loss of central vision.Mutation frequency of Leber hereditary has not been fully clarified. Objective This study was to investigate the mutation frequency of mitochondrial NDI gene associated with LHON in Chinese population. Methods The proposal of the study was approved by Ethic Committee of Wenzhou Medical College.Written informed consent was obtained from each subject initial of this trial.Eight hundred and ninety-four LHON patients and 134 normal subjects were collected.Genomic DNA was extracted from peripheral blood leukocytes of the all participants.Polymerase chain reaction (PCR) was used to amplify and sequence analysis of the mitochondrial ND1 gene was performed and aligned with revised Cambridge Reference Sequence(rCRS) of mitochondrial DNA.Then mutated gene frequency was screened and analyzed. Results Mutational analysis of mitochondrial ND1 gene in 894 LHON patients revealed the presence of G3316A,T3394C,G3460A,C3497T,G3635A,G3733A,and T4216C.11.19％ LHON patients (100/894 ) were found to be associated with the gene mutations mentioned above,and 3.24％ patients (29/894) showed the co-occurrence of three primary mutations.Mutation frequencies in LHON patients were 2.57％,2.23％,1.45％,3.80％,0.67％,0.11％,0.34％,respectively,and G3316A,T3394C,C3497T and T4216C also were detected in 134 normal controls with the mutation frequencies of 4.48％,2.99％,4.48％ and 1.49％,respectively.Mutation frequency analysis showed an insignificant difference in the mutations of G3316A,T3394C,C3497T and T4216C between LHON patients and normal controls (x2 =0.926,P=0.336;x2 =0.052,P=0.820; x2 =0.142,P=0.707;P=0.129).G3376A,G3496T,G3700A,A4136G,T4160C and C4171A were absent in Chinese LHON patients. Conclusions Mitoehondrial ND1 gene in LHON is a mutational hotspot in Chinese population,11.19％ (100/894)associated with LHON was caused by ND1 gene mutation.G3635A,G3733A may be rare pathological mutation in Chinese population.However,G3316A,T3394C,C3497T and T4216C are insufficient to produce the clinical phenotype,but they may play a synergic role for penetrance and phenotypic manifestation in LHON.

Objective To study the variants of S gene of hepatitis B virus among the breakthrough infection children immunized with hepatitis B vaccine in Huzhou city.Methods HBV DNA S gene regions were amplified and sequenced in 29 children with HBsAg-positive/HBV DNA-positive after immunized with hepatitis B vaccine.Results The sequencing results showed that 26 cases were B genotypes,3 were C genotypes.The amino acids mutations were presented in 9 children serum HBV DNA.The major amino acid mutations were in the "a" determinant of HBV DNA S gene.Conclusion Different S gene variants maybe cause HBV vaccination failure in some children in Huzhou city.No predominant variant was found.

ABSTRACT:OBJECTIVE To investigate the effect of peiminine on MEK1/2,ERK1/2 and the phosphorylatioin of bleomycin-induced pulmonary fibrosis in rats.METHODS Bleomycin of 5 mg/kg was instilled into the rats with a microliter injector to induce the acute lung injury.Sham-operated group and control group were given distilled water of 1 mL/100 g.Dexamethasone group was given equal volume of dexamethasone distilled water solution.Peiminine A and B group were given equal volume of peiminine distilled water solution of 5 mg/kg and 2.5 mg/kg,respectively.After consecutive daily gavage for 28 d,the rats were anesthetized and killed by carotid exsanguination.Lungs were fixed and embedded,and 4 μm sections were prepared. MEK1/2 and ERK1/2 in the lung tissues were detected by immunohistochemistry.The p-MEK1/2 and p-ERK1/2 were detec-ted by Western blot.RESULTS Peiminine significantly reduced the levels of ERK1/2 and MEK1/2 in lung tissues of rats with bleomycin-induced pulmonary fibrosis(P <0.01),and the effects was similar to dexamethasone (P > 0.05).No significant difference was observed between peimine A group and B group(P >0.05).Compared to the model group and dexamethasone group,peiminine significantly reduced the level of p-MEK1/2 and p-ERK1/2 in lung tissue of bleomycin-induced pulmonary fi-brosis rats(P <0.01).Compared to peimine A group,the B group displayed more significant efficacy(P <0.01).CONCLU-SION Peiminine attenuates the level of MEK1,ERK1 / 2 and the phosphorylation in lung tissues of bleomycin-induced pul-monary fibrosis rats,which may be one of the mechanism of anti-fibrosis.

Objective To obtain eukaryotic expression vectors containing coding region of nephroblastoma over-expression gene (NOV) and detect its expression in dermal multipotent stem cells(DMSCs). Methods A 1 178 bp cDNA fragment was amplified from the total RNA of normal rat brain tissue by RT-PCR and cloned into eukaryotic expression vector pEGFP-N1. The cloned insert was identified by double digestion of the recombinant plasmid with restriction enzymes Hind Ⅲ and BamH Ⅰ.The recombinant plasmid was transfected into DMSCs with liposome. The expression of NOV gene was detected by RT-PCR. Results Eukaryotic expression vectors containing 1 178-bp coding region of NOV gene were successfully constructed. DMSCs transfected with the recombinant plasmid expressed NOV gene. Conclusions That eukaryotic expression vector containing coding region of NOV gene is constructed and expressed in DMSCs can provide a strong molecular tool for the studies on the NOV gene and DMSCs.

To combine fingerprint and drug release rate in vitro, in order to study in vitro release of complex components of Chuanping sustained tablets, compound traditional Chinese medicine preparation. A qualitative determination of the characteristic peaks of the compound preparations were conducted by the fingerprint. The results of the dissolution rate determination under different release conditions showed that the release of three index components (methamphetamine, pseudoephedrine and scopolamine) of Chuanping sustained tablets was less affected by gastrointestinal factors, with similarity factors being more than 80 with unknown component release curves of three major characteristic peaks in the fingerprint. The qualitative determination proved that multiple components of the compound traditional Chinese medicine preparation was dissolved in vitro at similar rates, realizing the balanced release of complex components of the compound traditional Chinese medicine preparation. This study layed a theoretical and experimental basis for quality evaluation for the compound traditional Chinese medicine preparation.
Drugs, Chinese Herbal ; chemistry ; Tablets

OBJECTIVETo explore clinical, genetic and molecular features of two Chinese Han families with Leber's hereditary optic neuropathy (LHON).

METHODSOphthalmologic examinations revealed variable severity and age-at-onset of visual loss among probands and other matrilineal relatives of both families. The families exhibited extremely low penetrance of visual impairment. The entire mitochondrial genome of two probands was amplified by PCR in 24 overlapping fragments using sets of oligonucleotide primers.

RESULTSSequence analysis of complete mitochondrial genome in the pedigrees excluded three common LHON associated mutations G11778A, G3460A and T14484C, but revealed the presence of a known homoplasmic tRNA(Thr) A15951G mutation. It also showed distinct sets of mtDNA polymorphisms belonging to Eastern Asian haplogroup D4b1. The A15951G mutation is located at the extremely conserved nucleotide (conventional position 71) of tRNA(Thr). Thus, this mutation may alter the structure and stability of mitochondrial tRNA(Thr), thereby leading to a failure in the tRNA metabolism and mitochondrial dysfunction, causing visual impairment.

CONCLUSIONThe results suggested that the A15951G mutation might be involved in the pathogenesis of Leber's hereditary optic neuropathy in the two families.

Adolescent ; Asian Continental Ancestry Group ; genetics ; Base Sequence ; Child ; Humans ; Male ; Mitochondria ; genetics ; Molecular Sequence Data ; Mutation ; genetics ; Optic Atrophy, Hereditary, Leber ; genetics ; Pedigree ; RNA, Transfer, Thr ; genetics ; Sequence Alignment

OBJECTIVETo investigate the role of MT-ND1 m.3635G>A mutation in the pathogenesis of Leber's hereditary optic neuropathy (LHON).

METHODSBiochemical characteristics including the activity of complex Ⅰ, ATP production and oxygen consumption rate among lymphoblastoid cell lines derived from 3 carriers, 3 affected matrilineal relatives of the families and 3 controls were compared.

RESULTSComparison of mitochondrial functions in lymphoblastoid cell lines of the carriers, patients and controls showed a 51.0% decrease in the activity of complex Ⅰ in patients compared with controls (P<0.05). The m.3635G>A mutation has resulted in decreased efficiency of ATP synthesis (P<0.05). Comparison of oxygen consumption rate showed that the basal OCR (P<0.05), ATP-linked OCR (P<0.05) and the maximum OCR (P<0.05) have all reduced to some extent compared with the controls.

CONCLUSIONThese results showed that m.3635G>A, as a LHON-associated mutation, can lead to mitochondrial dysfunction.

Adenosine Triphosphate ; genetics ; Asian Continental Ancestry Group ; genetics ; Female ; Humans ; Male ; Mitochondria ; genetics ; Mutation ; genetics ; NADH Dehydrogenase ; genetics ; Optic Atrophy, Hereditary, Leber ; genetics ; Pedigree