Objective To appraise its value by strengthening spiral CT scanning to the thyroid gland cancer and according to the change. Methods 22 cases of thyroid gland cancer and focus compeytent thin layer(2～5mm) were scanned. The strengthening change dynamically to appraise the method and characteristic of CT strengthening scanning. Results The strengthening density of the various thyroid gland cancer CT images were different which contributed to the diagnosis of pathological change. Conclusion The strengthening CT scanning to thyroid gland cancer can reflect the course of blood pathological change and the strengthening characteristics and contribute to the formulation of the clinical operation scheme.

4.0 mg/L) fluorosis areas in 2008.The fluoride content of the drinking water,the chlidren's dental fluorosis and urinary fluoride were investigated.Results The fluoride in drinking water in the water improved areas was(1.4?0.8)mg/L,which was significantly lower than that in the non-water improved areas(2.6?1.5)mg/L(P

Primary liver cancer is one of the most commonly seen tumors in clinical practice. Due to the stealthiness and fast progress of liver cancer, only 20% of the patients may have chance to receive operation for radical therapy. Patients seldom get benefit from systematic chemotherapy and as a result, local chemotherapy methods such as transarterial chemoembolization (TACE) have become the mainstay in the treatment of liver cancer. Compared with systematic chemotherapy, TACE produces fewer side effects and most of such side effects are caused by postembolization syndrome manifested as nausea and vomiting, abdominal pain, fever, loss of appetite, etc.

Objective To investigate the effect of intrathecal injection (IT) of dexmedetomidine targeting Toll-like receptor 3 (TLR3) on neuropathic pain and spinal cord levels of TLR3 mRNA,interleukin-1β(IL-1β),tumor necrosis factor-alpha (TNF-α) proteins in rat model of chronic constriction injury (CCI).Methods Male Sprague-Dawley rats were randomly divided into five groups(n =10):the sham group(intrathecal normal saline,IT NS),CCI group (CCI + IT NS),DEX-pre group (CCI + IT DEX pre 2ds),DEX-post group (CCl + IT DEX post 7ds) and DEX + ATIP group (CCI + IT DEX + ATIP).The lumbar intrathecal catheters were implanted in L5_6 of rats and CCI models were established as previously described.The thermal and mechanical nociceptive thresholds were assessed by paw withdrawal latency(PWL) to radiant heat and yon Frey filaments.The DEX was administered intrathecally for 7 days starting from 2 day before surgery or 7day after surgery.The spinal cord expression of TLR3 mRNA was assessed by real-time polymerase chain reaction (PCR).Levels of IL-1β,TNF-α in spinal cord were detected by enzyme-linked immunosorbent assay (ELISA).Results Compared with the sham group,animals in CCI group had significandy lower mechanical (F =12.73,P ＜ 0.05) and thermal pain thresholds (F =14.65,P ＜ 0.05),higher expression of TLR3 mRNA (F =11.03,P ＜ 0.05) and levels of IL-1 β (F =9.67,P ＜ 0.05),TNF-α(F =8.78,P ＜ 0.05) in the spinal cord (P ＜ 0.05).Rats in DEX-pre group had significantly higher mechanical (F =11.03,P ＜ 0.05) and thermal pain thresholds (F =15.03,P ＜ 0.05) and significantly lower expression of TLR3 mRNA (F =14.65,P ＜0.05) and levels of IL-1β (F =12.51,P＜0.05,TNF-α (F =9.01,P ＜0.05) in the spinal cord compared with those in the CCI group (at any observed time points after ligation,but most significantly at 7 d).And the effects of DEX-pre group were abated by IT ATIP at the same time or 7days after surgery alone (P ＜ 0.05).Conclusions Intrathecal injection of DEX can decrease the levels of inflammatory factors by decreasing the TLR3 mRNA in the spinal cord of rats and prophylactic relieve the neuropathic pain induced by CCI.

Objective To investigate the effects of intrathecal injection (IT) of agonist and antagonist of N-methyl-D-aspartate receptor subunit 1 (NMDA NR1) on pain threshold and spinal levels of glutamate and glutamate transporter-1 (GLT-1) in rat model of chronic constriction injury (CCI) induced neuropathic pain.Methods Sprague-Dawley (SD) rats were randomly divided into 4 groups (Sham,CCI,NM-DA,and Humanin).The CCI model was established by right sciatic nerve constriction.The thermal and mechanical thresholds were assessed by paw withdrawal latency (PWL) to radiant heat and yon Frey filaments at 1,3,5,7,10 and 14 days as well as behavior after CCI.The NMDA and Humanin groups were administered intrathecally for 3 days before surgery.Spinal expression of GLT-1 assessed by Weston blotting and levels of glutamate were measured by enzyme-linked immunosorbent assay (ELISA).Results Compared to Sham group,the rats in CCI group gradually appeared the symptoms of toe close together,foot valgus and repeated licking to the operative side of the hind legs after surgery,and the paw withdrawal threshold (PWT),and PWL were greatly decreased,reaching the lowest level on the 7th day.Meanwhile,the glutamate content was increased,and the GLT-1 expression was decreased in spinal cord (P ＜ 0.05).Compared to CCI group,the rats in NMDA group were observed with further decrease in PWT,PWL and GLT-1 expressions at all observed timepoints (P ＜ 0.05),but increase in glutamate content in spine cord (P ＜0.05).Compared to CCI group,the rats in Humanin group were observed with increase in PWT,PWL and GLT-1 expressions at all observed timepoint (P ＜ 0.05),but decrease in glutamate content in spine cord (P ＜ 0.05).Conclusions NMDA receptor NR1 subunit participated in regulating neuropathic pain,inhibiting NMDA receptor NR1 subunit can alleviate neuropathic pain by down-regulating of glutamate and GLT-1.

Adrenal medullary hyperplasia (AMH) is a rare cause of secondary hypertension. Herein we analysed clinical manifestation of 4 cases. The clinical and biochemical features of AMH were similar to those of pheochromocytoma. 131 I MIBG scintigram and CT scanning were helpful to make differential diagnosis. Etiology, diagnosis and treatment of AMH were discussed.

In the view of the idea that the utilization of wild plants and animals in traditional Chinese medicine is destroying the biodiversity, this article discusses the relationship between traditional Chinese medicine and the biodiversity from a new point of view. The authors consider that reasonable utilization of the wildlife in traditional Chinese herbal medicine is beneficial to the protection of wildlife under proper management and guidance. However, there is still a long way to go to balance the relationship between the wildlife protection and exploration. In view of this, some propositions are put forward, including enforcing the relative laws and rules for herbal resources protection, carrying out the research work of the background data, formulating the standard for the classification of the rare and endangered species, accelerating the investigation of the substitute resources of extinctive wildlife for medical use, enforcing the citizens' consciousness of wildlife protection and developing the industrial and artificial cultivation of traditional Chinese herbal medicinal plants and animals.

Objective To investigate the efficacy of high-dose ambroxol in elderly patients with aspiration pneumonias. Methods Totally 62 patients aged 65 years and over with aspiration pneumonia were enrolled into 2 groups:conventional-dose group intravenously given ambroxol 60 mg/d (n=30) and high-dose group received 270 mg/d (n=32).The times of remission and fever disappearance,rate of adverse effects,average duration of hospitalization,rates of mortality and recurrence within 2 months were observed. Results There were no significant differences in clinical charecteristics between the two groups.The times of remission and fever disappear ance and average duration of hospitalization were lower in high-dose group than in conventional-dose group [(3.2±0.6)d,(54.2±19.5)h,(12.7±4.1) d vs.(3.8±1.1)d,(66.5±18.4)h,(13.5±3.1)d,t=2.11,2.36,2.04,all P＜0.05].No differences were found in rates of mortality and recurrence within 2 months between the two groups (6.3％,3.1％ vs.10.0％,13.3％,x2=0.01,0.87,both P＞0.05).Adverse effects did not appear in the two dose groups. Conclusions High-dose ambroxol is efficient and safe for aspiration pneumonia in elderly patients.

Objective To investigate the beneficial effects and possible mechanisms of intrathecal injection of dexmedetomidine (DEX) in protection of spinal cord ischemia-reperfusion injury.Methods Spinal cord ischemia-reperfusion injury was induced in rabbits by infrarenal aortic occlusion for 30 minutes.Twenty-four rabbits were randomly divided into four groups:sham group,I/R group,DEX group (1 μg/kg dexmedetomidine by intrathecal injection),DEX + ATIP group (1 μg/kg dexmedetomidine and 0.5 μg/kg atipamezole (ATIP) by intrathecal injection).Physiological indices were assessed and motor neurons in the ventral gray matter were counted by histological examination.The expression of total extracellular signal-related kinase (t-ERK),phospho-extracellular signal-related kinase (p-ERK),and caspase 3 were assessed by Western blotting and real-time polymerase chain reaction (RT-PCR).The water content in spines was also measured.Results Intrathecal injection of dexmedetomidine minimized the neuromotor dysfunction and histopathological deficits(F =14.32,P ＜ 0.05) and attenuated the influences of peroxidation at 24 hours after spinal cord ischemia-reperfusion injury.The physical indices during experiment were comparable among all groups.In addition,intrathecal injection of dexmedetomidine reduced the excessive expression of caspase 3 mediated by ERK signal pathway(F =15.45,P ＜ 0.05).Conclusions Pre-emptive intrathecal injection of dexmedetomidine produced beneficial effects on spinal cord after spinal cord ischemia-reperfusion injury in a rabbit model of transient aortic occlusion.This beneficial effect was partly attributed to the inhibition of caspase 3 mediated by ERK signal pathway,which represents a potential therapeutic approach to mitigate spinal cord injury after aortic occlusion.

Objective:To compare the extent and time course of alveolar bone loss and osteoclast activation in two murine models of periodontal disease:molar ligation and Porphyromonas gingivalis (P.gingivalis) oral inoculation.Methods:A split-mouth design was applied to two groups of mice (C57BL6,6-8 weeks old,n =24 in both groups),resulting in four treatment groups:(1) Control group:unligated upper right 2nd molars receiving CMC only,(2)Ligature group:ligation of a 9-0 suture around the upper left 2nd molar,(3) P.gingivalis group:unligated upper right 2nd molar receiving P.gingivalis challenge only,(4)Ligature ± P.gingivalis group:ligation of the upper left 2nd molar in combination with oral inoculation with 109 colony-forming units(CFU) P.gingivalis.Alveolar bone loss was measured as the cementoenamel junction and alveolar bone crest (CEJ-ABC) distance.In the study,48 C57BL6 mice were designed and treated as described above,and osteoclasts were counted on histological sections following tartrate-resistant acid phosphatase (TRAP) staining and counts were normalized to alveolar bone surface distance.Then 36 C57BL6 mice were investigated,of which 30 were ligated a 940 silk ligature around the 2nd molar in the left maxillary quadrant and 6 were not ligated.After ligation for 1 week,the ligatures in 12 mice were taken off for either 1 week or 2 weeks.The CEJ-ABC distance of the 6 mice without ligation was baseline.The CEJ-ABC distances were measured and analyzed.The data were analyzed with one-way ANOVA.Results:Molar ligation induced marked alveolar bone loss after 3,6,9 and 12 weeks [(0.16 ±0.04) mm,(0.16 ±0.02) mm,(0.18 ±0.03) mm,(0.17 ±0.02) mm],vs.corresponding controls [(0.09 ± 0.03) mm,(0.10 ± 0.01) mm,(0.12 ± 0.04) mm,(0.12 ± 0.01) mm] andP.gingivalisgroup [(0.09±0.03)mm、(0.12±0.01)mm,(0.12±0.02)mm,(0.10± 0.01) mm],P ＜ 0.05.Combined treatment with molar ligation and P.gingivalis did not further increase the CEJ-ABC distance.Evidence for osteoclast activation was found one day after molar ligation,and TRAP-positive cell numbers peaked on day 3 (12 ±4 vs.control 2 ±2,P ＜0.01).After taking off ligature following ligation for 2 weeks,it showed significantly regrowth of alveolar bone compared with that before removal of the ligature on day 7 [(0.07 ±0.02) mm vs.(0.13 ± 0.01) mm,P ＜ 0.01].Conclusion:Molar ligation is a rapid and effective way to induce periodontal bone loss in mice.Osteoclast activation occurs within 24 hours of ligature placement,and the extent of bone loss well exceeds that of the P.gingivalis-induced bone loss.Removing ligature after periodontal disease might help bone regeneration by regrowth of the alveolar bone.