OBJECTIVETo observe the intestinal movement of transient receptor potential vanilloid 1 or vanilloid receptor 1 (TRPV1) knockout mice after stimulated by electroacupuncture (EA), and to primarily explore the roles of TRPV1 receptor in the jejunal motility regulated by acupuncture.

METHODSNormal wild-type CL57BL/6 and TRPV1 gene knockout mice were recruited in two groups, the B6 group and the TRPV1 group, 15 in each group. The thermal threshold and the mechanical pain threshold were respectively detected using JL-F digital photo thermal analyzer instrument and ALMEMO2450 machine. The difference between the two thresholds were compared. Meanwhile, a self-made pressure head was placed in the jejunum. The internal pressure was monitored. When the pressure was stable, 2 mA 2/15 Hz EA at Quchi (LI11), Tianshu (ST25), Shangjuxu (ST37), and Dachangshu (BL25) to observe the changes of intestinal pressure value between before and after EA. The curve of internal pressures was recorded.

RESULTS(1) The stimulation of light/heat and mechanical stimulation were obviously slowed in the TRPV1 group than in the B6 group (P < 0.01). (2) In the intestinal pressure observation experiment, the bowel movement was not obviously seen in the two groups when acupunctured at Quchi (LI11) and Shangjuxu (ST37) (P > 0.05). (3) Acupuncture at Tianshu (ST25) and Dachangshu (BL25) of TRPV1 knockout mice could lead to intestinal movement (P < 0.05), mainly inhibited bowel movement. The changing degree was equivalent to that of B6 mice.

CONCLUSIONSUnder the physiological condition, TRPV1 might be mediated by thermal and mechanical stimulation. But TRPV1 mediated acupuncture effect was quite complex, indicating TRPV1 mice might be one of intestinal movement mediating factors.

Animals ; Electroacupuncture ; Gastrointestinal Motility ; Jejunum ; physiology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; TRPV Cation Channels ; physiology

This article stated the status,major problems and methods in medical professional English teaching.The effective ways might be by means of training teachers,writing suitable textbooks,providing professional English speaking environment and improving model of teaching.

Differential display-PCR was used to clone the differential expressed genes between Mycobacterium tuberculosis virulence strain H37Rv and its avirulent mutant H37Ra. All of different genes were cloned, sequenced and some were analyzed by Northern-blotting. Two cDNAs that appeared to be expressed in H37Rv, but not in H37Ra, were cloned and sequenced. Rv0170, and Rv1894c, code for proteins with unknown functions. The two gene were present in H37Ra, but not expressed. These results show that mRNA DD methodology can represent a potential tool for investigation of M. tuberculosis gene expression.

Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Lymphohistiocytosis, Hemophagocytic ; Male

Bacterial cellulose (BC) is a natural polymer that has bioactivity, biodegradability and biocompatibility. It displays unique physical, chemical and mechanical properties including high crystallinity, high water holding capacity, nanofibre-network structure, high tensile strength and elastic modulus. Due to its unusual material properties, BC has recently become a kind of attractive biomedical material in the international research.Describes BC's properties, study history and its applications as biomedical materials, especially gives emphasis to introduce the applications of BC on scaffold tissue engineering, artificial blood vessels, artificial skin and the treatment of skin wound, as well as the present study status.

Cholestasis, Intrahepatic ; etiology ; Citrullinemia ; complications ; Humans ; Infant ; Male

Adult ; Aneurysm, Dissecting ; complications ; Aortic Valve Insufficiency ; complications ; Female ; Humans ; Pregnancy ; Pregnancy Complications, Cardiovascular

Animals ; Beryllium ; toxicity ; Cells, Cultured ; DNA Damage ; drug effects ; Lung ; cytology ; Male ; Rats ; Rats, Sprague-Dawley

Adult ; Fluoroscopy ; Foreign Bodies ; therapy ; Humans ; Male ; Trauma, Nervous System ; therapy ; Wounds, Penetrating ; therapy

The information entropy, H = - Pk log Pk, has been proved in this paper to be always positive and invariant for a linear coordinate transformation, so that it can be used as a measuring index. On the contrary, the integral term of the information entropy, H(x) = -f(x) log f(x) dx, is not always positive and invariant for a linear coordinate transformation. Therefore, H(x) can not be used as a measuring index. An example of a probability density function for response of nerve to electric current with different intensities is given to confirm above conclusions.