Study on protective effect of water extract from Sabia parviflora on liver injury in mice induced by acetaminophen / 中国中药杂志

The aim of this study was to observe the protective effect of water extract from Sabia parviflora on mice with acute liver injury induced by acetaminophen, and investigate its possible mechanism. Fifty-eight Kunming mice were divided into 6 groups, 8 in the normal group, 10 in the model group, 10 in the biphenyl diester group, and 10 each in the low, medium and high dose groups. After adaptive feeding for one week, the mice in normal group were intragastrically administered with an equal volume of 0.5% sodium carboxymethylcellulose sodium(CMC-Na), and the mice in other groups were intragastrically administered with corresponding drugs at 20 mL·kg~(-1) once a day. Then acetaminophen(200 mg·kg~(-1)) was administered after the above drug administration except the normal group. The behavior and signs of the experimental animals were observed every day and the samples were taken for experiments on the next day of the final administration. The liver mass and mass index were calculated. The blood was collected from the abdominal aorta and centrifuged to obtain the serum for detecting aspartate aminotransferase(AST) activity and alanine aminotransferase(ALT) activity. The liver tissue homogenate was used to detect superoxide dismutase(SOD) activity, glutathione(glutathione, r-glutamyl cysteingl+glycine, GSH) activity and malondialdehyde(MDA) content. Liver tissue was analyzed for histological analysis. The results showed that S. parviflora could alleviate the lipid peroxidation damage in the liver caused by acetaminophen, reduce the ALT and AST activities in serum, increase the levels of SOD and GSH in liver tissue, decrease the content of MDA in liver tissue, and inhibit the apoptosis. S. parviflora could also improve the live histopathological profile, protect liver cells and restore liver function. Among them, the high dose had the most significant effect and showed dose-effect relationship. This study indicated that S. parviflora had a significant protective effect on acetaminophen-induced liver injury in mice, and its mechanism may be related to its anti-oxidation effect and inhi-bitory effect on apoptosis.

Effect of low-intensity pulsed ultrasound on the enchondral bone formation in posterolateral lumbar fusion in rabbits / 中南大学学报(医学版)

OBJECTIVE@#To observe the effect of daily low-intensity pulsed ultrasound (LIPUs) therapy on improving the enchondral bone formation in lumbar fusion in rabbit models, and to explore its possible mechanism.@*METHODS@#Posterolateral noninstrumented bilateral fusions were performed at the L5 approximately L6 levels in 20 New Zealand rabbits. The autograft iliac bone was implanted on the left side, and the hydroxyapatite bioceramic artificial bone on the right. The rabbits were divided into a treatment group and a control group randomly. One week after the surgery, LIUPs was administered for 20 minutes per day for 4 weeks over the fusion site in the treatment group and false treatment was used in the control group. Post-anterior X-ray photographs were taken to determine the conditions of fusion area, and then, rabbits were killed and the fusion tissues were obtained. Chondrocytes were detected by histological and cytological methods.@*RESULTS@#Compared with the control group, the fusion rate of the treatment group was significantly up-regulated (P0.05).@*CONCLUSION@#Low-intensity pulsed ultrasound therapy improves the endochondral bone formation in the lumbar spine fusion in rabbit models.

Tetramethylpyrazine accelerated spinal cord repair through regulation of caspase-3 and neurofilament protein expression: an acute spinal cord injury model in rats / 中南大学学报(医学版)

OBJECTIVE@#To investigate the effect of tetramethylpyrazine on spinal cord repair through hypothesized pathways including regulation of caspase-3, neurofilament protein NF-L, NF-H, and NF-M expression.@*METHODS@#Allenos weight drop method was used to establish acute spinal cord injury (SCI) rat model at T10 section and was conducted in 80 adult Sprague Dawley rats that were subsequently divided into pseudo-therapy group (sodium chloride group, n=40) and tetramethylpyrazine group (treatment group, n=40). Eight normal rats were included into the pseudo-surgery normal group (n=1 for each time point). The function of spinal cord was evaluated with animal behavioral scores by measuring modified Rivilin loxotic plate degree and counting BBB score at 1, 3, 7, 14, and 21 d postoperatively. The injured spinal cord tissue samples were harvested at 1 h, 3 h, 6 h, 1 d, 3 d, 7 d, 14 d, and 21 d postoperatively (n=5 for each time point) for the preparation of continuous histological sections that were analyzed the expression of caspase-3,NF-L,NF-H, and NF-M by immunohistochemistry method.@*RESULTS@#At postoperative Day 7, 14, and 21, animal behavioral scores revealed higher modified Rivlin loxotic plate degree and BBB scores in the treatment group when compared with those of the control group (P<0.05). The cells in the injured spinal cord tissue expressed significantly less caspase-3 and significantly more NF (NF-L, NF-H and NF-M) in the treatment group than those in the control group at Day 3, 7, and 14 (P<0.05). There was positive correlation between modified Rivlin loxotic plate degree and NF expression, BBB score and NF expression; and negative correlations between BBB score and caspase-3 expression, caspase-3 expression and NF expression.@*CONCLUSION@#Tetramethylpyrazine improves spinal cord healing through regulation of caspase-3 and neurofilament protein expression.

A controlled clinical trail of perioperative nutritional support of thoracolumbar spinal tuberculosis / 中国骨伤

<p><b>OBJECTIVE</b>To evaluate the influence of perioperative nutritional support on nutritional status of patients with thoracolumbar spinal tuberculosis.</p><p><b>METHODS</b>Forty-eight patients with thoracolumbar spinal tuberculosis (male 25 and female 23, aged from 35 to 60 years, with an average of 48.25 years) were randomized into two groups. Twenty-four patients nutritional support were increased intravenously for 14 days (7 days before and after operation) in experimental group. Twenty-four patients in control group were supplied with routine diet. The body weight, plasma concentrations of albumin and ESR were detected on the 7th day before operation and on the 7th day after operation. The total wound drainage was recorded and compared.</p><p><b>RESULTS</b>Body weight and plasma concentrations of albumin on the 7th day after operation and those on the 7th day before operation were not significantly different in experimental group (P > 0.05). In control group, body weight and plasma concentrations of albumin on the 7th day after operation was lower than those on the 7th day before operation (P < 0.05). The total wound drainage of experimental group was less than that of control group (P < 0.05). ESR on the 7th day after operation was lower than that on the 7th day before operation in two groups (P < 0.05); but the decrease of ESR in experimental group was more than that in control group (P < 0.05).</p><p><b>CONCLUSION</b>Nutritional support is beneficial to alleviating innutrition caused by tubercle bacillus and operation. It can promote the effects of operation and anti-tuberculotic drugs.</p>

Infection of intervertebral space and the interventional therapy / 中南大学学报(医学版)

OBJECTIVE@#To investigate the effect of interventional therapy in the treatment of intervertebral space infection.@*METHODS@#The needle was punctured into the infected intervertebral space from the post-lateral side of the spine monitored by X-rays. The pus was drained, the degenerative disc tissues and necrosis tissues were excised and taken out, and at the end a drainaging catheter was put into the space through the needle. The patient should lie in bed absolutely. The antibiotics was injected into the space through the silicon catheter every day. Three to four weeks later, the catheter was removed.@*RESULTS@#All the 8 patients got good results after the therapy. The low back pain was dramatically alleviated instantly at the day of operation. Erythrocyte sedimental rate gradually descended. After 3 approximately 4 weeks of treatment,the catheter was removed.@*CONCLUSION@#Interventional therapy of the intervertebral space infection has notable advantage over the open operation.

Integrity of lumbar facet joint and curative effect after a lumbar intervertebral disc operation / 中南大学学报(医学版)

OBJECTIVE@#To analyze the relation between the clinical outcome and the integrity of the facets after a lumbar operation,and to provide a reference for choosing operative method and clinical prognosis.@*METHODS@#Forty-three patients with complete data underwent uni-segment discectomy were enrolled. There were 3 surgical interventions: open-window discectomy, full or semi-laminectomy. Groups were divided based on the integrity of the facets after the operation, and the clinical symptoms and signs were evaluated using the Japanese Orthopaedic Association Back (JOA) scores at 24-month follow-up.@*RESULTS@#Preoperative JOA scores were not significantly different among the groups (P>0.05). Compared with the facet intact group at 24-month follow-up,JOA scores were descended statistically in total uni-facetectomy group and total uni-facetectomy plus partial opposite facetectomy group (P<0.01).@*CONCLUSION@#Keeping facets integrated plays an important role in achieving good clinical results,and the damage of facet should be avoided in the lumbar operation.

Diagnosis and treatment of postoperative intervertebral infectio / 中南大学学报(医学版)

OBJECTIVE@#To retrospectively explore the diagnosis and treatment of postoperative lumbar intervertebral disc infection.@*METHODS@#Twelve patients who suffered from postoperative lumbar intervertebral disc infection between April 1995 and September 2004 were confirmed doubtlessly by the diagnosis. They were treated with early immobilization combined with early and sufficient antibiotics and adequate corticosteroid. Patients with severe symptoms were managed by percutaneous puncture and washing discectomy such as rising temperature and perivertebral muscle spasm besides nostalgia, and early debridement of all necrotic tissue was done.@*RESULTS@#Six were healed by non-operation and operation in the other 6. All had gotten locomotion with corset after the operation for 6-8 weeks and were followed-up from 6 months to 3 years. They have achieved excellent outcomes.@*CONCLUSION@#When a postoperative disc space infection occurs, early diagnosis and treatment should be undertaken to achieve excellent outcomes.

Different operation methods for thoracolumbar spinal tuberculosis / 中南大学学报(医学版)

OBJECTIVE@#To compare the advantages and disadvantages among the conventional operative methods with the primary anterior debridement, intercentrum auto grafting, and anterior internal fixation method for the thoracolumbar spinal tuberculosis, and to discuss the applying principle.@*METHODS@#Twenty-seven patients with thoracolumbar spinal tuberculosis were treated by the primary anterior debridement, intercentrum auto grafting, and anterior internal fixation, 8 patients were treated by focus debridement and intercentrum auto grafting operations, and the other 22 patients were treated by focus debridement from Feburary 1998 to July 2003, and we analysed the status of the grafting bone fused, the neural function resumed, the malformation rectified and the whole cure ratio.@*RESULTS@#All patients were cured after the follow-up of 15.2 months averagely. Three thoracic spinal and 1 lumbar spinal tuberculosis patients who suffered local infection were cured by debridement and other managements. The time of beginning active movement postoperatively was shortened, and the degrees of kyphosis correction had increased in the anterior internal fixation group compared with the other two groups (P <0.05). But the cost and the bleeding resulted from operation had increased in the anterior internal fixation group compared with the other two groups (P <0.05).@*CONCLUSION@#The conventional and the modern operation methods of thoracolumbar spinal tuberculosis have respective advantages and disadvantages, so that they can complement rather than replace each other.

Therapeutic effects of intraarticular injection of ligustrazine on knee osteoarthritis / 中南大学学报(医学版)

OBJECTIVE@#To evaluate the therapeutic effects of intraarticular injection of ligustrazine on knee osteoarthritis (OA).@*METHODS@#Seventy-one cases of knee osteoarthritis (82 knees) were randomly divided into ligustrazine (LI) group and sodium hyaluronate (SH) group. The patients were intraarticularly injected ligustrazine or sodium hyaluronate once a week for 5 consecutive weeks, and were followed-up for 3 months. Lequesneos protocol for the evaluation of OA severity and activity was used. The therapeutic effects and changes of Lequesneos index were observed after the treatment.@*RESULTS@#There was significant decrease in Lequesneos index in SH group after the treatment (P0.05). Three weeks later, there was significant decrease in Lequesneos index in both groups after the treatment (P0.05). After the 5-week treatment, the efficacy rate of the LI group was 82.1%, and that of the SH group was 87.2%. No serious toxic or side effect was observed during the treatment and the follow-up.@*CONCLUSION@#Intraarticular injection of ligustrazine has a therapeutic effect on knee OA. No adverse effect is observed, but it needs long time to take effect.

Surgical treatment for lumbar discogenic low back pain / 中南大学学报(医学版)

OBJECTIVE@#To explore the curative effect of surgical treatment for lumbar discogenic low back pain.@*METHODS@#Forty-two patients with lumbar discogenic low back pain were treated with disc excision and lumbar interbody fusion: 12 of them were treated with posterior lumbar interbody fusion (PLIF), 30 with afront lumbar interbody fusion (ALIF). The clinical results were evaluated by pre- and post-operative visual analogue scale (VAS), and the fusion rates of the lumbosacral spine were evaluated by X-ray.@*RESULTS@#The average follow-up period was 18 months, ranging from 6 to 36 months. Low back pain basically disappeared in 11 patients treated with PLIF, with mild back pain in one patient; VAS after the operation decreased significantly in comparison with that preoperatively (P<0.01). Low back pain basically disappeared in 28 patients treated with ALIF; VAS after the operation decreased significantly in comparison with that preoperatively (P<0.01). The fusion rate was 90% in patients treated with PLIF, and 93% in patients with ALIF.@*CONCLUSION@#Disc excision and interbody fusion is effective in the treatment of lumbar discogenic low back pain, but the operation indications should be paid attention to.

Mitochondrial DNA deletion mutations in articular chondrocytes of cartilage affected by osteoarthritis / 中南大学学报(医学版)

OBJECTIVE@#To detect the changes of mitochondrion DNA (mtDNA) sequence in articular chondrocytes of cartilage affected by osteoarthritis and to clarified the pathogenetic mechanism of osteoarthritis.@*METHODS@#We analyzed the mtDNA 4,977 bp deletion mutations of articular chondrocytes in 10 patients with osteoarthritis and 3 normal cartilages using the gap-PCR amplification method. We designed a two round PCR detection method, in which total DNA was isolated from articular chondrocytes as the template of the first round PCR reaction and products from the first round were the template in the second round reaction.@*RESULTS@#The results of the first rounds of PCR reaction showed the mtDNA 524 bp amplified products in the osteoarthritis group and in the corresponding peripheral blood samples were not detected, but the 533 bp products were detected. However,the results of the second round reaction revealed that the 524 bp zones were detected in 2 of the 10 osteoarthritis patients and the corresponding peripheral blood samples were not detected. The 533 bp products were detected in all specimens. The mtDNA 524 bp amplified products in all the normal articular chondrocytes and the corresponding peripheral white blood cells contrast were not detected in both rounds PCR.@*CONCLUSION@#This was the first study to evaluate the mtDNA 4799 bp large fragment deletion mutational accumulation between nt8,470 - nt13,447 of articular chondrocytes in osteoarthritic cartilage. Osteoarthritis may be related to mtDNA mutation of articular chondrocytes.

Clinical analysis of the treatment of reserving limb for patients with malignant bone tumor / 中南大学学报(医学版)

OBJECTIVE@#To investigate the curative effect of the treatment of reserving limb for patients with malignant bone tumor.@*METHODS@#Forty patients with bone neoplasms underwent the operation of reserving limbs. The neoadjuvant chemotherapy was given to all the patients before the operation. After the ablation of the tumor we used the artificial prosthetic replacement,tumor tissue deactivation and reimplant, variant bone and joint transplantation to reserve the limb.@*RESULTS@#All the patients were followed up. The average follow-up time was 34.8 months. Eight patients got complications. And the fineness rate was 72.5% according to functional evaluation standard of Enneking after surgical treatment of bone tumor.@*CONCLUSION@#The operation of reserving limb was an ideal method to cure the malignant bone tumor. The proper operative treatment with neoadjuvant chemo-therapy is helpful to extend the life of the patients and increase the quality of life.