Objective To investigate the different changes in the regulation and gene expression of mu opioid receptor (MOR) in rat brain after acute and chronic morphine dependence.Methods Forty male SD rats weighing (210?35)g were randomly divided into five equal groups of eight animals each: (1) control; (2) acute dependence: (3) chronic dependence;(4) acute abstinence; (5) chronic abstinence. In acute dependence group rats received eight consecutive subcutaneous injection of morphine 5mg?kg-1 at 2h interval. In chronic dependence group morphine was injected subcutaneously three times a day(8:00, 15: 00, 22:00) for six days. The doses of morphine were 5, 10, 20, 40, 50, 60 mg? kg-1?day-1 from the 1st day to the 6th day respectively. In the two abstinence groups, the withdrawal syndromes were induced by intraperitoneal naloxone 5 mg ? kg-1. The rats in control group received saline. 30 min after the end of all procedures the animals were decapitated on ice. Brain was removed immediately and kept in liquid nitrogen. The Bmax and Kd values of 3H-DAMGO saturation binding to MOR were measured by Scatchard analysis. The gene expression of MOR was appraised by RT-PCR. Results (1) In the acute dependence group the Bmax value(the specific binding capacity of MOR) significantly increased and the affinity decreased. After abstinence the Bmax value returned to normal, but the affinity was still low. In chronic dependence and abstinence groups Bmax value decreased significantly and there was no change in Kd value. (2) The level of MOR mRNA increased significantly in acute dependence group and returned rapidly to normal after abstinence . In chronic dependence and abstinence groups the transcription of MOR was significantly lower than in control group. Conclusions The modulation of MOR in rat brain is different between acute and chronic dependence and there must be similar post-receptor mechnism involved.

BACKGROUND:Orthodontic treatment is a mechanical force for tooth to cause the remodeling of periodontal tissue, produced by the tooth movement. The main aspect of orthodontic periodontal tissue remodeling is the alveolar bone. Insulin-like growth factor is an important factor in the remodeling of periodontal tissue, which plays an important role in the growth, differentiation and growth of the cels. OBJECTIVE:To review the role of insulin-like growth factors in periodontal tissue remodeling. METHODS: A computer-based retrieval of PubMed, CNKI and Guizhou Province Digital Library Database was performed to search articles related to the role of insulin-like growth factors in periodontal tissue remodeling. The keywords were “insulin-like growth factor; periodontal tissue; remodeling” in English and Chinese, respectively. RESULTS AND CONCLUSION: Insulin like growth factor belongs to the insulin family, a kind of peptides, which can promote the migration, proliferation, differentiation, colagen and matrix synthesis and alkaline phosphatase activity of osteoblasts, fibroblasts and mesenchymal cels in the periodontal ligament. It also plays an important role in the repair of injury. During orthodontic treatment, the use of suitable orthodontic force combined with insulin-like growth factor can promote periodontal tissue remodeling, accelerate the orthodontic tooth movement and shorten the treatment time for patients.

ObjectiveTo investigate the clinical efficacy of hydroxyethyl starch 130/0.4 and sodium chloride injection in the treatment of patients with early hemorrhagic shock (HS).MethodsFifty-two cases of early HS were divided into compound sodium chloride injection group(control group,26 cases) and hydroxyethyl starch 130/0.4 sodium chloride injection group (treatment group,26 cases) by random digits table.The clinical effect,mean arterial pressure (MAP),respiratory rate (RR) and heart rate (HR) and serum sodium,serum chloride and prothrombin time(PT) were statistically analyzed before and after treatment for 60 min.ResultsCure rates in treatment group and control group were 84.6％ (22/26) and 38.5％ (10/26),and mortality rates were 15.4％ (4/26) and 61.5％ (16/26),respectively.The difference showed statistical significant(P ＜0.05).MAP,HR and RR in treatment group were obviously improved compared with control group[ (91.5 ± 8.6 )mm Hg( 1 mm Hg =0.133 kPa) vs.(78.5 ± 7.9 )mm H8,( 81.5 ±8.6) times/min vs.( 108.4 ± 10.2) times/min,(21.4 ± 5.3) times/min vs.(25.5 ± 4.6) times/min,P ＜ 0.05 ].Compared with control group,serum sodium,serum chloride and PT in treatment group were no significant difference(P ＞0.05).ConclusionHydroxyethyl starch 130/0.4 and sodium chloride injection could increase the effective circulating blood volume,and improve tissue and organ perfusion and reduce mortality during the patients with early HS.

Objective:To assess whether intrathecal orphanin FQ can develop the antinociceptive effect tolerance,and whether there is a cross tolerance between the antinociceptive effect of intrathecal orphanin FQ and the ? opioid receptor agonist morphine.Methods: Tail flick test was used to observe the change of antinociceptive effect after orphanin FQ/morphine intrathecal microinjection into the rats tolerant to acute or chronic morphine/orphanin FQ.Results:Like morphine,large dosage of continuous intrathecal orphanin FQ microinjection produced tolerance to the antinociceptive effect,but there was no apparent cross tolerance between the orphanin FQ and morphine; Hyperalgesic response was found in morphine tolerant rats,but not in orphanin FQ tolerant rats.Conclusion:Lack of cross tolerance between the antinociceptive effect of intrathecal orphanin FQ and morphine indicates that the mechanism of tolerance to orphanin FQ may differ from that to morphine; The antinociceptive effect of intrathecal orphanin FQ may be largely related with its specific receptor in the spinal cord.

Objective: To observe the effects of OFQ on endomorphin-1 in pain modulation. Methods: OFQ and endomorphin-1 were microinjected intracerebroventricularly or intrathecally in rats. The pain thresholds were measured by tail-flick test and acetic-acid induced twitching test, and the changes of antinociceptive effects induced by endomorphin-1 were observed. Results: OFQ antagonizing endomorphin-1 antinociception at the supraspinal level, while enhancing at the spinal level were observed. Conclusion: OFQ has functional effects on endomorphin-1 in pain modulation,both in the brain and the spinal cord. The mechanisms of its effect may be different.

Objective: To select the prescription of Harmine HCl ointment. Methods: The orthogonal design was used for selecting the prescription with transdermal absorption rate constant (K) and flow energy of activition (E ?) as selecting standard. Results: The optimum prescription is as follows: Azone (2.0%), Span-80 ( 0.2%), Tweens-80 (0.4%), Glycerylmonostearate (2.5%), Vaselin (4.0%), Liquid (11%). Conclusion: The prescription design is available, and the ointment has a good stability.

This paper reviewed the researches of TCM syndromes of rheumatoid arthritis in the past four years.The author believed that more and deeper epidemiological surveys are needed for studying rheumatoid arthritis and hence to improve its clinical effects.

Endemic dental fluorosis has been reported in some regions of the world. China seemed to have high prevalence of endemic dental fluorosis, especially in southwest China. It is now most likely that excessive fluoride intake during enamel development play a key role in the pathogenesis of dental fluorosis. However, excessive intake of fluoride-induced cellular and molecular mechanisms of dental fluorosis are not entirely conclusive. Scholars at home and abroad have made a lot of research on pathogenesis of enamel fluorosis by using various experimental techniques. More recent studies mainly suggest that endoplasmic reticulum stress and calcium overload-associated apoptotic pathway may participate in fluoride excess-evoked pathogenesis of dental fluorosis. Furthermore, the functional changes of enamel matrix protein and protease activity may be involved in the pathological event. This paper summarized the recent research progress on this topic.

BACKGROUND:Orthodontic tooth movement is based on the periodontal tissue remodeling. In the exogenous factors accelerating orthodontic tooth movement, Chinese herbal medicine has become a research hotspot because of its wide resources, low cost, easy to extract, mild effect, smal toxic, less side effects and drug resistance. OBJECTIVE: To summarize the role of Chinese herbal medicine in the periodontal tissue remodeling during orthodontic tooth movement. METHODS:A computer-based retrieval of CNKI, Wanfang and PubMed databases was performed for articles related to Chinese herbal medicine for improving orthodontic tooth movement published before 2014. The keywords were “Chinese herbal medicine, orthodontic tooth movement, periodontal tissue remodeling” in Chinese and English, respectively. RESULTS AND CONCLUSION:Erigeron breviscapus, Salvia, teasel, Drynaria, baicalin, evening primrose oil as Chinese herbs are most widely used in the promotion of periodontal tissue remodeling, characterized as wide resources, low cost, easy to extract, mild effect, low toxicity, less drug resistance. In the clinical orthodontic treatment, it is hoped to accelerate orthodontic tooth movement and shorten the treatment time. Therefore, under the appropriate corrective force, Chinese herbs can be used properly to improve periodontal tissue repair and remodeling, which can improve the microcirculation of periodontal tissue, increase the local blood flow, promote bone formation and repress bone resorption.

Objective To observe the clinical efficacy of Yaoyi-Shenhuojiu combined with synthetic rehabilitation therapy on shoulder-hand syndrome after stroke (SHSAS). Methods 100 SHSAS patients were randomly divided into an observation group and a control group, with 50 patients in each group. Patients in the observation group were treated with Yaoyi-Shenhuojiu on the basis of comprehensive rehabilitation training of the control group. After treated for 2 consecutive weeks, the pain, motor function, activities of daily living in patients of both groups were compared and improvement of the constitution according to VAS, FMA, MBI was also compared. Results After treatment, the decrease of VAS score in the observation group (3.43 ± 1.76 vs. 5.21 ± 2.15, t=4.530) and the increase of FMA score (55.66 ± 4.33 vs. 40.45 ± 3.75, t=18.776) was significantly better than the control group (P<0.01); Physiological function in SF-36 health survey questionnaire (95.78 ± 7.68 vs. 87.88 ± 7.21, Z=5.042), physiological functions of (50.78 ± 21.44 vs. 36.89 ± 18.42, Z=7.241), body pain (83.22 ± 13.45 vs. 75.52 ± 13.23, Z=4.055), overall health (50.25 ± 18.45 vs. 39.01 ± 18.63, Z=8.043), vigor (79.28 ± 11.92 vs. 70.22 ± 10.69, Z=3.216), social function (85.78 ± 20.12 vs. 74.71 ± 19.22, Z=4.128), emotional function (36.66 ± 23.79 vs. 28.11 ± 18.21, Z=6.052) and mental health (81.17 ± 9.72 vs. 74.61 ± 11.25, Z=5.367) eight dimensions of higher score in the observation group were also significantly better than the control group (P<0.05). The total effective rate (94.0% vs. 76.0%) in the observation group was significantly better than the control group (χ2=5.020, P=5.020). Conclusion Yaoyi-Shenhuojiu combined with comprehensive rehabilitation therapy can effectively improve limb movement function in patients with SHSAS, besides its improving the life self-care ability and life quality.