Acute effects of different Tai Chi practice protocols on cardiac autonomic modulation.

Tai Chi serves as an effective exercise modality for enhancing autonomic regulation. However, a majority of existing studies have employed the single routine (SR) protocol as the basis for health interventions. The extent to which the gong routine application (GRA) protocol achieves similar levels of exercise load stimulation as traditional single practice routines remains uncertain. Therefore, this study the distinct characteristics of autonomic load stimulation in these different protocols, thus providing a biological foundation to support the development of Tai Chi health promotion intervention programs. we recruited a cohort of forty-five university students to participate in the 15 min GRA protocol and SR protocol. We collected heart rate and heart rate variability indicators during periods of rest, GRA protocol, and SR protocol utilizing the Polar Scale. Additionally, we assessed the mental state of the participants using the BFS State of Mind Scale. In summary, the autonomic load is lower in the GRA protocol compared to the SR protocol, with lower sympathetic activity but higher parasympathetic activity in the former. Results are specific to college students, additional research is necessary to extend support for frail older adults. It is advised to incorporate GRA protocol alongside SR protocol in Tai Chi instruction. This approach is likely to enhance Tai Chi skills and yield greater health benefits.

Involvement of cAMP receptor protein in biofilm formation, fimbria production, capsular polysaccharide biosynthesis and lethality in mouse of Klebsiella pneumoniae serotype K1 causing pyogenic liver abscess.

The global regulator cAMP receptor protein (CRP) has been shown to be required for the full virulence and/or for the expression of virulence determinants in a wide set of bacterial pathogens. In this work, the crp mutant as well as the complemented mutant was constructed from a wild-type Klebsiella pneumoniae capsular serotype K1 strain causing the primary pyogenic liver abscess. The phenotypes of wild-type strain, crp mutant and complemented mutant were characterized systematically. It was disclosed that K. pneumoniae CRP was required for the in vitro growth, fimbria production, biofilm formation and lethality in mouse, but it inhibited the capsular polysaccharide biosynthesis. These indicated the important roles of CRP in regulating the expression of virulence and biofilm genes in K. pneumoniae.

[Purification and identification of recombinant varicella-zoster virus glycoprotein E].

OBJECTIVE: To purify and identify recombinant Varicella-Zoster Virus Glycoprotein E. METHODS: The recombinant plasmid pGEX-VZVgE was induced by isopropyl-beta-D-thiogalactoside (IPTG), the fusion protein was purified with affinity chromatography column; then the purified fusion protein was cleaved by thrombin, and the product's antigenicity was examined by Western blot. RESULTS: The product of pGEX-VZVgE induced by IPTG was separated from the mixture proteins by the affinity chromatography column, the expressed fusion protein's relative molecular mass was about 98 x 10(3). After cleavage, the obtained VZV Glycoprotein E's relative molecular mass was about 72 x 10(3); the purified fusion protein and VZV Glycoprotein E were single band by SDS-PAGE. The available antigenicity of Glycoprotein E was confirmed by Western blot. CONCLUSION: Purification of VZV Glycoprotein E with affinity chromatography is an effective method. It provides a foreground for studies on the application of VZV gE.