[Sagittal Balance Parameters Correlate with Resorption of the Lumbar Disc Extrusion: Results of a Retrospective Study].

Objective: A retrospective study was designed to explore the relationship between the satittal spinopelvic alignment in patients with lumbar disc extrusion and spontaneous resorption.

Methods: From May 2010 to March 2019, referring to NASS evidence-based clinical guidelines, patients with lumbar disc extrusion were enrolled in this retrospective study, according to the degree of herniation size during the follow-up, the patients were divided into two groups: resorption (group R: the herniated disc completely disappeared or the herniation size was grade 1 according to Michgan State University (MSU) classification) and nonresorption (group N: the herniated disc remain unchanged or the herniation size overpass grade 1), spinopelvic parameters (including the pelvic incidence (PI), sacral slope (SS), pelvic tilt (PT), lumbar lordosis (LL)) were determined on standing profile radiographs of the lumbar spine and pelvis, and mean values were compared using the multi-factor analysis of variance.

Results: This study included 67 patients with lumbar disc extrusion.

[Research on dynamic and synchronous changes of microcirculatory ultrastructure and free radical in rat cerebrum after exhaustive swimming].

This research is designed to detect the dynamic changes of microcirculatory ultrastructure and the MDA content, SOD and GSH-px activity in rat cerebrum immediately, 24h and 48h after exhaustive swimming. The results showed that there were obvious changes of ultrastructure in rat cerebral microcirculation immediately after exhaustive swimming. The changes were resumed in some degree after 24h and recovered almost to the normal after 48h.

[Application of oligo-microarray in an in vitro study of the effects of pulsatile fluid shear stress on gene expression of human smooth muscle cells].

We assessed the effects of pulsatile flow shear stress on the gene expression profiles of human umbilical artery smooth muscle cells (HUASMCs) in vitro using the Express Chip DNA microarray method and investigated the difference between pulsatile and steady shear stress on differentially expressed genes of HUASMCs. In a modified pulsatile flow chamber system, HUASMCs were exposed to pulsatile and steady fluid shear stress (5.52 dyne/cm2) for 6 h respectively, and normal static cultured HUASMCs were selected as a control.

[Mechanism study of muscle injury from high tension (I)--The biomechanical effect of training on muscle injury from downhill running in rats].

In this experiment, we tested the biomechanical characteristics of rat's fast and slow skeletal injury from downhill running at different times. The result indicates that the mechanical properties of fast and slow skeletal muscle, including maximum tensile strength, maximum strain, elasticity and energy absorption, gradually stregthen with extended time (not more than 48 hours) after eccentric exercise-induced injury. On the other hand, the maximum strain of slow muscle is higher than that of fast muscle.

[The study on the anti-osteoporosis effect of clodronate in ovariectomized rats].

To evaluate the anti-osteoporosis effect of clodronate in ovariectomized rats, 44 female Wistar rats, aged 8 months, were divided randomly into 4 groups: the SHAM group (subjected to sham operation); the OVX group (subjected to bilateral ovariectomy); the E3 group (subjected to bilateral ovariectomy and treated after surgery with nilestriol 1 mg/kg BW by gavage once a week for 12 weeks), and the clodronate group (subjected to bilateral ovariectomy and treated after surgery with clodronate 5 mg/kg BW by subcutaneous injection twice a week for 12 weeks). All the animals were sacrificed 12 weeks after the operation. The blood and urine samples were collected for determination of biochemical indices.

[Effect of acupuncture on exercise ability in rabbits].

7 male rabbits were chosen for the experiments. They were tired out on the P20 type table. The blood samples were obtained from the arteria before and after exercise.