Liraglutide protects against nonalcoholic fatty liver disease in ApoE knockout mice with high-fat diet and silenced Acrp30 by increasing AMPK / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate the mechanism of liraglutide-mediated protection against nonalcoholic fatty liver disease (NAFLD) using aApoE knockout (KO) mouse with high-fat diet (HFD) and Acrp30 knockdown.</p><p><b>METHODS</b>Fifty-six male ApoE KO mice were divided into the following six modeling and experimental groups:regular chow fed (ApoE KO, n=10), HFD fed (HF, n=10), HFD+Adenovirus (Ad)-small hairpin (sh) Acrp30 (Ad-shAcrp30, n=10), HFD+Ad-shGreen Fluorescent Protein (GFP) (Ad-shGFP, n=6), HFD+Ad-shAcrp30+liraglutide (liraglutide, n=10), and HFD+Ad-shAcrp30+saline (saline, n=10). Weight-matched C57BL/6 mice on the regular chow diet were used as the control group (WT control, n=10).All mice were fed their assigned diet for 16 weeks.The Ad-shGFP or Ad-shAcrp30 was injected by tail vein at the end of 14 and 15 weeks.Mice in the liraglutide group received 1 mg/kg of the drug, twice daily, intraperitoneally for a total of 8 weeks (from the 9th to 16th week).Fasting blood samples were collected for testing levels of fasting plasma glucose (FPG), triglycerides (TGs), total cholesterol (TC), free fatty acid (FFA), alanine aminotransferase (ALT), Acrp30 and insulin.Liver tissue was procured for histological examination.Expression of mRNA was detected by real-time RT-PC and of protein was detected by western blot analysis.</p><p><b>RESULTS</b>The Ad-shAcrp30 treated mice had reduced expression of Acrp30 at both the mRNA and protein levels in adipose tissues and plasma, as compared with the AdshGFP treated mice (all P < 0.01).Compared to the WT and ApoE KO groups, the HF group showed higher levels of FPG, FFA, TGs and TC (all P < 0.01); furthermore, the Ad-shAcrp30 treatment compounded these changes.The Ad-shAcrp30 treated group had markedly higher hepatic TC and TGs than the HF group (P < 0.01 and P < 0.05).Oil Red O staining showed that there was more lipid droplets in the liver tissue of the Ad-shAcrp30 treated group than in that of the HF group (P < 0.01), and hematoxylin-eosin staining confirmed these results.Liraglutide treatment prevented the increase in body weight, FPG, FFA, TGs, TC and ALT levels, as compared to the saline controls (all P < 0.01), but the plasma Acrp30 levels and the Acrp30 mRNA and protein expression in adipose tissues were elevated (all P < 0.01).Oil-Red O staining indicated that the liraglutide group had a significantly lower hepatic lipid content than the saline group, and total hepatic TG and TC were reduced in the former group (P < 0.01 and P < 0.05).The liraglutide treatment significantly attenuated the mRNA expression of ACC and FAS (both P < 0.01) but increased AMPK phosphorylation (P < 0.01).</p><p><b>CONCLUSION</b>Administration of liraglutide prevented the development of HFD-and hypoadiponectinemia-induced metabolic disturbance and accumulation of hepatic lipids in this mouse model system of NAFLD.</p>

Experimental study on the therapeutic effect of C-phycocyanin against pulmonary fibrosis induced by paraquat in rats / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the therapeutic effect of C-phycocyanin (C-PC) from Spirulina platensis on paraquat (PQ)-induced pulmonary fibrosis in rats.</p><p><b>METHODS</b>A total of 90 healthy Wistar rats were randomly and equally divided into normal control group, model group (PQ group), and C-PC treatment group (C-PC group). Each rat in the PQ group and C-PC group were orally administered with a single dose of PQ (50 mg/kg) to establish a rat model of PQ poisoning. Then, the rats in the normal control group and PQ group were orally given saline solution (1 ml/100 g) every day, and the rats in the C-PC group were orally given C-PC (50 mg/kg) every day. Six rats were randomly selected from each group on days 1, 3, 7, 14, and 28. The inferior lobe of each rat's right lung was homogenized for the measurement of hydroxyproline (HYP) and maleic dialdehyde (MDA) levels and superoxide dismutase (SOD) activity. Parts of each rat's left lung were subject to HE staining and Masson staining for pathological observation, and the expression of transforming growth factor-β(1) (TGF-β(1)), nuclear factor-kappa B p65 (NF-κB p65), and tumor necrosis factor-α (TNF-α) in lung tissue was measured by immunohistochemistry.</p><p><b>RESULTS</b>The HYP levels on days 1, 3, 7, 14, and 28 and MDA levels on days 14 and 28 were significantly lower in the C-PC group than in the PQ group (P < 0.05, P < 0.01). The SOD activity was significantly higher in the C-PC group than in the PQ group on days 1, 7, 14, and 28 (P < 0.05, P < 0.01). The protein content of TGF-β(1) and the activities of NF-κB p65 and TNF-α in the PQ group and C-PC group were significantly higher than those in the normal control group, while the indices in the C-PC group were significantly lower than those in the PQ group (P < 0.05, P < 0.01). The pathological observation showed that C-PC could alleviate pulmonary alveolitis and fibrosis in rats with PQ poisoning.</p><p><b>CONCLUSION</b>C-PC can significantly inhibit PQ-induced pulmonary alveolitis and fibrosis in rats.</p>

Association between polymorphism of dopamine β-hydroxylase and neurological dysfunction hereditary susceptibility of electric welders / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the relationship between genetic polymorphism of dopamine β-hydroxylase (DBH) and manganese-induced nerve injury.</p><p><b>METHODS</b>In a cross-sectional study, 402 electric welders who had worked over one year in relatively fixed sites were recruited, and the concentration of manganese in which they worked was stable. These samples was divided into high exposure group (CEI > 1) and low exposure group (CEI < 1) by CEI. Between the two groups, the groups were divided into abnormal group and normal group according to the result of neurologic check (there were 81 workers with abnormal neurological dysfunction in high exposure group and 28 workers in low exposure group, P < 0.05). Polymorphism of DBH gene was analyzed with polymerase chain reaction-restriction fragment length polymorphism.</p><p><b>RESULTS</b>The distribution of A2A2 genotype and A2 allele of DBH was significantly different. In high exposure group, the distribution of A2A2 genotype and A2 allele of DBH in abnormal group was significantly wider than in normal group (A2A2 genotype, OR = 1.248, P < 0.05, A2 allele, OR = 1.103, P < 0.05). In low exposure group, the distribution of A2 allele of DBH in abnormal group was significantly wider than in normal group (OR = 1.176, P < 0.05).</p><p><b>CONCLUSION</b>The individuals who carry A2A2 genotype and A2 allele of DBH have increased risk of neurological dysfunction after explosion to manganese for a certain time, which suggests that polymorphism of DBH (intron 5 Taq I) would play a great role in hereditary susceptibility of neurological dysfunction cause by manganese.</p>

Analysis of the short-term and long-term effect of Er-yttrium aluminum garnet laser in stapes surgery / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To analyze the short-term and long-term effect of Er-yttrium aluminum garnet (Er-YAG) laser in stapes surgery.</p><p><b>METHODS</b>There were 86 patients operated by the Er-YAG laser stapedotomy from 2001 to 2007 were analyzed retrospectively, with 23 male, 63 female and 13 double ears and with the average age of 48 years old, ranging from 12 to 78. All of 99 ears suffered deafness of conduction. The average air-bone-gap (ABG) of all patients before surgery was (37.4+/-9.0) dB HL (ranging from 13.7 to 58.7 dB). The patients followed-up over 6 weeks after the surgery was regarded as the short-term result, while over one year follow-up as the long-term effect (according to the standard of the Committee on Hearing and Equilibrium of the American Academy of Otolaryngology-Head and Neck Surgery). The followed-up average time was (26.3+/-15.8) months (range from 14 to 73 months). The pre-post-operation average bone conduction auditory threshold of 2 kHz and 4 kHz were observed. The data of the patient whether or not has the symptoms of tinnitus and dizzy and the lasted days were also recorded.</p><p><b>RESULTS</b>After surgery, short-term ABG of 99 ears was (15.7+/-8.7) dB, matched-pairs t test with the numbers of before surgery, t=22.79, P<0.01. The results of 45 ears (45.5%) with ABG<10 dB or air conduction improved more than 30 dB were regarded as excellence. The air conduction of 88 ears (88.9%) improved more than 15 dB was regarded as utility. With 82 ears (82.8%) followed-up more than 1 year, the average ABG was (11.7+/-6.8) dB, matched-pairs t test with the numbers of before surgery, t=23.37, P<0.01, compared with the short-term visit result [(15.3+/-9.2) dB, 82 ears], t=4.82, P<0.01, both of which were considered statistically extremely significant. Among them, 50 ears (61.0%) have the excellent effect while 74 ears with (90.2%) ABG<20 dB. The average bone conduction auditory threshold in 2 kHz was (34.5+/-15.0) dB before surgery, matched-pairs t test with short-term visit result (33.4+/-15.9) dB, t=1.96, P=0.026 14, with long-term visit result (32.7+/-15.2) dB, t=3.24, P=0.000 87, all of which had the significant difference, manifest that the Cohort's notch had been improved after the surgery. The data of bone conduction auditory threshold of 4 kHz with long-term following-up result matched-pairs t test with that of surgery before, t=0.76 (P>0.05), which showed the change of the bone conduction had no statistics difference. There were 55 ears had the persistent tinnitus before surgery, in which 42 ears (76.4%) with no the tinnitus, 13 ears with same to that of preoperative, and 3 ears (3.0%) with remaining tinnitus after surgery but who had not it preoperation and all disappeared after 2 - 3 days. There were 12 ears (12.1%) with light dizzy after surgery, but their live could deal with himself and the average dizzy lasted 2.3 days.</p><p><b>CONCLUSIONS</b>Er-YAG laser stapes surgery is safe to the inner ear, and it primal free from the imminent risk in stapes surgery, so the effect can be affirmed.</p>

Effect of multi-technique of intact canal and scute rebuilding in treatment of middle ear cholesteatoma / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To assess the results of multi-technique with intact canal and scute rebuild operation for middle ear cholesteatoma.</p><p><b>METHODS</b>Analysis of 113 cases (males 60, females 53, with mean 42.7 years old), of which with double ears of 11 cases, and totally 124 ears (11 ears for one review, an ear for third time review, and totally 137 operations) was retrospectively performed. Ten cases less than 19 years old were operated from September 2001 to January 2006 for middle ear cholesteatoma as well as ossiculoplasty with intact canal and scute rebuild etc multi-technique. All cases were followed up for a mean (36.58 +/- 20.47) months.</p><p><b>RESULTS</b>There were 118 ears (95.2%) without cholesteatoma recurrence. Six ears were found cholesteatoma recurrence. Other 6 post-operation ears with drum re-perforation and hearing drop were re-operated. The pre-operation air-bone gap (ABG, average of 0.5, 1, 2 kHz) of 124 ears, with in initial 112 ears, was (33. 61 +/- 12.35) dB, while that of post-operation ABG was (13.58 +/- 9. 27) dB, by partnership t test, t = 18.35, P < 0.01. The pre-operation ABG in reviewed 12 ears at the first pre-operation was (38.83 +/- 12.43) dB, but post-operation ABG (10.38 +/- 8.99) dB, by partnership t test, t = 5.38, P = 0.00022. The ABG closure to within 20 dB was tested in 100 ears while ABG over 20 dB but air conduct (AC) in 40 dB was in 6 ears, and then as succeed was in 106 ears (85.5%). ABG closure within 10 dB was in 50 ears and though ABG over 10 dB but ABG reduced over 30 dB was in 9 ears (59/124, 47.6%) as which as best result. Bone conduct (BC) threshold was tested of 21 ears (16.93%) with raise 1-9 dB, of 42 ears (33.9%) with no change and of 61 ears (49.2%) with descend 1-28 dB. Of 10 cases less than 19 years old post-operation ABG was (8.80 +/- 5.27) dB, which indicated that all cases was as succeed.</p><p><b>CONCLUSIONS</b>Using intact canal and scute rebuild etc multi-technique a normal canal, hearing improvement and very low recurrent could be gained for middle ear cholesteatoma, especially in juvenile and children. The multi-technique should be almost no damage for hearing bone conduct.</p>

Results of surgical treatment for advanced otosclerosis / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To assess the effect of stapes surgery on advanced otosclerosis (AO).</p><p><b>METHODS</b>In 300 cases randomly collected of otosclerosis in 1970 to 1999, 68 cases (77ears) were selected for retrospective analysis, which met the criteria of advanced otosclerosis (mixed deafness, with bone-conduction levels exceeding 40 dB and air-conduction levels exceeding 70 dB in 500 - 2000 Hz).</p><p><b>RESULTS</b>The air-conduction of sixty-eight cases (77 ears) were from 77.32 dB to 53.7 dB (500-2000 Hz) after operation, mean decreased 23.62 dB. Of 71 ears (92.21%) obtained air-conduction improved over 10 dB, of 46 ears (59.74%) gained A-B Gap closure in 10 dB. Air-conduction were from 79.01 dB to 58.23 dB (500 - 4000 Hz) after operation and mean decreased 20.78 dB. Of 68 ears (88.31%) obtained air-conduction improved over 10 dB, of 32 ears (41.56%) gained A-B gap closure in 10 dB. After followed up 5-25 years, of 67 ears were retained stabilization, of 28 ears obtained more improve than postoperation. But 4 ears had drop (all was stapes-elevation and re-improvement after them was reviewed).</p><p><b>CONCLUSION</b>Stapes surgery is effective operation to cured otosclerosis, advanced otosclerosis or far-advanced otosclerosis had greater help to improved hearing.</p>

Betamethasone injection in chronic hypertrophic laryngitis / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To evaluate the curative effects of Betamethasone for treatment of voice hoarseness of chronic hypertrophic laryngitis.</p><p><b>METHODS</b>From July, 2001 to December, 2002, 48 cases of the chronic hypertrophic laryngitis had been treated by injected of Betamethasone at vocal cords. Fundamental frequency (FO), jitter, shimmer, normalized noise energy (NNE) acoustics' parameters were tested and paired t test were calculated. The voice quality of 1 month and 6 months after treatment were synthetically graded, one-way ANOVA and the DANCAN test were conducted.</p><p><b>RESULTS</b>Eight cases were injected under surface anesthesia with indirect laryngoscopy at the clinic service. Thirty-eight cases were injected under general anesthesias with micro-laryngoscopes. After six months following up, the voice hoarseness was obviously improved, the congestion or oedema of vocal cord was lessened, and the voice quality was improved as well. The results of F0, jitter, shimmer, NNE acoustics' parameters after treatment 6 months showed: 8 of 48 cases (17.39%) had treatment effect, 22 out of 48 cases (47.83%) had obviously effect, 10 out of 48 cases (21.74%) had cured. The total effectiveness had reached 86.96% (40 of 48 cases). Six of 48 cases (13.04%) was failure.</p><p><b>CONCLUSION</b>Vocal cord injection of Betamethasone for the hoarseness of chronic hypertrophic laryngitis is an effective treatment method.</p>

Observation of adhering otitis media operation result / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To assessment result with multi-measures operation for adhering otitis media.</p><p><b>METHODS</b>A retrospective review of 108 cases (male 45, female 63), double ears 12, all was 120 ears. Of 20 ears had been radical operated for cholesteatoma some years ago. Of 46 ears had incorporate cholesteatoma now. Of 54 ears had only adhering in middle ear but no had been radical or incorporate cholesteatoma who underwent operation from January 1999 to May 2003 for chronic ear disease as well as ossiculoplasty with multi-technique measures (for example auto-bone cup-pole or gung-pole as total and partial ossicular replacement prostheses; scute rebuild by auto-bone; absorbable Metrogel; tympanic chorda nerve as a spring press prostheses etc) were used in operation, and were followed up mean (26.11 +/- 11.31) months (range 12 approximately 53 months).</p><p><b>RESULTS</b>One hundred and twenty ears mean AB gap was (38.60 +/- 12.70) dB pre-operation. It was (15.28 +/- 11.69) dB post-operation. Partnership t test, t = 21.24, t 0.01 = 2.60 < 21.24, P < 0.01. The air-bone gap (AB gap) closure to within 20 dB as succeed achieved in 70% (84 ears). AB gap closure in 10 dB as best result in 40% (48 ears). Air conduction was under 40 dB in 70% (83 ears). AB gap closure not enough 10 dB and Air conduction over 40 dB as no effect was 6% (7 ears) .</p><p><b>CONCLUSIONS</b>As long as technique measures is right, even though adhering middle ear had much difficult in operation, it still can gain succeed to 70%. But had still 30% no succeed, more study is necessary.</p>