OBJECTIVETo explore biomechanical properties and stress-strain of mucosa scars after cleft palate surgery.

METHODSAfter the model of mucosa scars was made, the mucosa scars and normal mucosa were excised and examined immediately by tensionometry.

RESULTSThe mucosa scars after cleft palate surgery were compared with normal mucosa. The Poisson's ratio of mucosa scars and normal mucosa was 0.5 and 0.49, respectively, showing no significant difference between the two groups. The ultimate Young's modulus of mucosa scars was about 24.22 MPa, however, it declined to 3.32 Mpa in normal mucosa.

CONCLUSIONSThe mucosa scars after cleft palate surgery are biomechanically weaker than normal mucosa. It can be used for further research, such as maxillary orthognathic surgery, distraction osteogenesis, and orthodontic treatment.

Biomechanical Phenomena ; Cicatrix ; physiopathology ; Cleft Palate ; surgery ; Humans ; Mouth Mucosa ; physiopathology ; surgery ; Osteogenesis, Distraction ; Osteotomy, Le Fort

The paper introduces the manipulation and different clinical application examines of the 4 needling methods, oblique needling, horizontal needling, deep needling and transversal needling summarized by Prof. Wu Lian-zhong on the basis of many years's clinical work.
Acupuncture Therapy ; methods ; Adult ; Female ; Humans ; Male ; Middle Aged

OBJECTIVETo optimize formulation of tanshinone II(A)-loaded PLGA nanoparticles and compare the difference of two methods in preparation and quality of nanoparticles.

METHODThe two methods were nanoprecipitation method and emulsion-evaporation method. Single factor experiments and central composite design and response surface method were used to optimize the formulation of nanoparticles. The nanoparticles were characterized at size, morphology, entrapment efficiency, drug loading, drug recovery rate, crystallinity and drug release in vitro.

RESULTThe mean diameters were 225 nm and 183 nm, the entrapment efficiency were 95.49% and 87.99%, the drug loading were 2.03% and 0.16%, and the drug recovery rates were 38.42% and 17.59% respectively for nanoprecipitation method and emulsion-evaporation method.

CONCLUSIONNanoprecipitation method was better than emulsion-evaporation method for preparation of tanshinone II(A)-loaded PLGA nanoparticles.

Chemical Precipitation ; Crystallization ; Diterpenes, Abietane ; Emulsions ; Lactic Acid ; chemistry ; Nanoparticles ; chemistry ; Particle Size ; Phenanthrenes ; chemistry ; isolation & purification ; Plant Roots ; chemistry ; Plants, Medicinal ; chemistry ; Polyglycolic Acid ; chemistry ; Polymers ; chemistry ; Quality Control ; Salvia miltiorrhiza ; chemistry ; Technology, Pharmaceutical ; methods ; Volatilization

OBJECTIVETo provide data on alcohol consumption and drug use among middle-school students aged 13-15 in 4 cities of China, and to provide evidence for developing intervention strategies on adolescents alcohol and drug use.

METHODSStandardized sample selection process of two-stage cluster-sampling was used in middle-school students in Beijing, Hangzhou, Wuhan and Urumchi. A self-administered questionnaire survey was conducted in Sept. 2003 and data was analyzed by Epi Info software.

RESULTSAmong 7344 students from grade 1 to 3, 36.5% had tasted while 14.4% had drunk alcohol in the past 30 days. 9.9% had experienced drunkness, 5.1% had been in trouble because of drinking, and 1.6% had ever used illegal drugs. Significant differences had been found in all the cities. Higher graders, older students and boys had higher rates of alcohol and addictive drug use than low graders, younger students and girls. 51.9% had been taught on take alcohol safety and another 27.6% on skills of rejecting alcohol, during the past school year.

CONCLUSIONSThe current situation of alcohol and addictive drug use among Chinese middle-school students aged 13-15 seemed to be quite critical, suggesting that it is necessary to carry out relevant health education in accordance with different characteristics in area, gender and age of the students.

Adolescent ; Alcohol Drinking ; epidemiology ; China ; epidemiology ; Female ; Humans ; Male ; Students ; Substance-Related Disorders ; epidemiology

OBJECTIVETo investigate the protective effect and mechanism of Shenqi Compound on diabetic angiopathy modeled rats.

METHODSTotally 18 SD rats were randomized into 3 groups, i.e., the normal control group, the diabetic mellitus (DM) group, and Shenqi Compound group, 6 in each group. The DM rat model was established by feeding high-fat diet (to induce hyperlipidemia) +intraperitoneal injection of small dose streptozotocin (STZ). Shenqi Compound was given to rats in the Shenqi Compound group at the daily dose of 2 g/kg. Equal volume of normal saline was given to rats in the model group and the normal control group by gastrogavage. All treatment was lasted for 12 weeks. Then 2-D and ultrasonic integrated backscatter technique were used to evaluate structural and functional changes of abdominal aorta in the progression of diabetic macroangiopathy. The fibrosis degree of the aorta vessel and myocardium capillaries were observed by using HE and Masson trichrome staining. The tension of the aortic vascular ring was determined. The transforming growth factor beta (TGF-beta) mRNA expression was detected by real time PCR (RT-PCR). The protein expression of TGF-beta, collagen I, collagen III, connective tissue growth factor (CTGF), and phosphorylation P38 MAPK were detected by Western blot.

RESULTSCompared with the normal control group, abdominal aortic systolic inner diameter, diastolic inner diameter, Peterson elastic modulus, stiffness index, and backscatter integral significantly increased; the rangeability of integral backscatter and the extension coefficient of cross section significantly decreased in the DM group (all P < 0.05). After 12 weeks aforesaid indices were obviously improved in the Shenqi Compound group (P < 0.05). Results of HE and Masson staining showed that the fibrosis degree of the aorta vessel and myocardium capillaries was obviously alleviated in rats of the Shenqi Compound group (P < 0.05). Results of the aortic vascular ring tension showed that acetylcholine induced vasodilatation and maximum diastolic percent were obviously elevated in the Shenqi Compound group (P < 0.05). Compared with the normal control group, the mRNA expression of TGF-beta, and the protein expression of TGF-beta, collagen I, and collagen III, and phosphorylation of P38 MAPK all significantly increased in the DM group (P < 0.05). Compared with the DM group, the mRNA expression of TGF-beta, and the protein expression of TGF-beta, collagen I, and collagen III, and phosphorylation of P38 MAPK all decreased (P < 0.05).

CONCLUSIONSShenqi Compound could effectively improve the arterial function in diabetic marcoangiopathy and microvascular dysfunction. The mechanism might be due to the down-regulating the expression of TGF-beta, and further suppressing the phosphorylation of P38 MAPK, reducing the synthesis of collagen I and collagen III, therefore, ameliorating arterial and myocardial interstitial fibrosis.

Animals ; Collagen Type I ; metabolism ; Collagen Type III ; metabolism ; Diabetes Mellitus, Experimental ; drug therapy ; Diabetic Angiopathies ; prevention & control ; Drugs, Chinese Herbal ; pharmacology ; Male ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Transforming Growth Factor beta1 ; metabolism ; p38 Mitogen-Activated Protein Kinases ; metabolism

OBJECTIVETo investigate the expression of cyclooxygenase-2 (COX-2) in different prostate cancer (PCa) cell lines and its role in the acquisition of invasive and metastatic potentials of PCa.

METHODSWe detected the expressions of COX-2 in prostate cancer cell lines LNCaP, C4-2, IF11, IA8 and PC-3 with different metastatic potentials by Western blotting and RT-PCR, and analyzed their roles in the invasion and metastasis of different PCa cell lines.

RESULTSWestern blotting and RT-PCR showed that the expression of the COX-2 protein was high in PC-3, but absent in IF11, IA8, LNCaP and C4-2 (P < 0.05), and it was consistent with the expression of COX-2 mRNA.

CONCLUSIONCOX-2 expresses differently in PCa cell lines with different metastatic potentials. The overexpression of COX-2 may be associated with the high invasion and metastasis of PC-3, but not with the metastasis of other cell lines.

Cell Line, Tumor ; Cyclooxygenase 2 ; metabolism ; Humans ; Male ; Neoplasm Metastasis ; Prostatic Neoplasms ; metabolism ; pathology ; RNA, Messenger ; genetics

OBJECTIVETo observe the efficacy differences of acupoints massage for asthenopia of video display terminal (VDT) under different exposure dose.

METHODSOne hundred and two cases (204 eyes) were divided into a low exposure group and a high exposure group, fifty-one cases in each group. The same intervention of acupoints massage on Cuanzhu (BL 2), Jingming (BL 1), Sizhukong (TE 23), Sibai (ST 2) and Taiyang(EX-HN 5) were given to the two groups, one acupoint for 5 min and once everyday, one month of which made a course. The symptom score, tear film break-up time (BUT) and Schirmer I test(SIT) were observed before and after treatment.

RESULTS(1) The correlation coefficient of cubic curve model of the exposure dose was the biggest with symptom improvement index (P = 0.000), which indicated that the lower VDT exposure index was, the more obvious the symptom improved. The symptom improvement indices of low exposure group and high exposure group, which were (52.31 +/- 16.65)% and (28.93 +/- 13.35)% respectively, were statistical significant difference (P = 0.000). (2) Compared to before treatment, the levels of BUT and SIT in the two groups were both significantly higher (P < 0.05). Compared with the high exposure group, the levels of BUT and SIT in the low exposure group were increased by 0.826 s (P = 0.022) and 1.029 mm (P = 0.033), respectively, after the impact of BUT and SIT was corrected before the research.

CONCLUSIONThe acupoints massage can improve the symptoms and ocular physiology for patients with VDT asthenpia, and it is more effective for the low exposure cases.

Acupuncture Points ; Adult ; Asthenopia ; physiopathology ; therapy ; Computer Terminals ; utilization ; Female ; Humans ; Male ; Massage ; Middle Aged ; Occupational Diseases ; physiopathology ; therapy ; Tears ; secretion ; Treatment Outcome ; Young Adult

OBJECTIVETo explore the effective therapeutic method in the treatment of idiopathic sudden hearing loss (ISHL).

METHODSOne hundred and eighty-eight cases of ISHL were randomized into a warming-promoting needling group (74 cases), a conventional acupuncture group (56 cases) and a medication group (58 cases). In the conventional acupuncture group, the conventional needling technique was applied to Baihui (GV 20), Fengchi (GB 20), Yifeng (TE 17), Tinggong (SI 19), Touqiaoyin (GB 11) and Zhigou (TE 6) on the affected side. The treatment was given 5 times each week. Totally, the treatment of 6 weeks was required. In the warming-promoting needling group, on the basic treatment as the conventional acupuncture group, the warming-promoting needling technique was applied to Fengchi (GB 20). In the medication group, the intravenous drop with salvia injectio and mecobalamin was prescribed, once per day, for 10 days totally. Meanwhile, Erlong Zuoci Wan was prescribed for oral administration, 8 pills each time, three times a day for 30 days continuously.

RESULTSAll of the three therapeutic methods achieved the effect on ISHL. The total effective rate was 89.2% (66/74) in the warming-promoting needling group, which was better than 62.5% (35/56) in the conventional acupuncture group and 53.4% (31/58) in the medication group (both P<0.01).

CONCLUSIONThe warming-promoting needling techinque achieves the significant efficacy on ISHL. The hearing improvement is superior to that treated with either the conventional needling technique or medication.

Acupuncture Points ; Acupuncture Therapy ; instrumentation ; Adult ; Female ; Hearing Loss, Sudden ; therapy ; Humans ; Male ; Middle Aged ; Needles ; Treatment Outcome

Objective Type 1 diabetes mice model was established to investigate the changes of key enzymes involved in testosterone synthesis in testes of early diabetic mice.Methods Tatolly 20 male C57 mice were randomly divided into two groups:control and diabetic groups,and the diabetes mice were ip administered with a single dose of 150 mg/kg Streptozotocin.Four weeks after confirmation of diabetic model,the serum and testis were collected for further study.The qRT-PCR method was used to measure the expression of LHR and steroidogenesis synthetase StAR,P450scc,3β-HSD6,P450c17a1,and 17β-HSD3 mRNA.ELISA assay was performed to measure the levels of testosterone and luteinizing hormone (LH) in serum,and the enzymatic activities of 3β-HSD1,1P450c17 and 17β-HSD3 in testis tissue.Results Compared to control group,the levels of testosterone and LH of diabetic group declined significantly (P ＜ 0.05) after four weeks.The mRNA levels of LHR,StAR,CYP11a1,Hsd3b6,CYP17a1 and Hsd17b3,and enzymatic activities of 3β-HSD6,P450c17 and 17β-HSD3 were also decreased significantly compared with control group (P ＜ 0.05,0.01 and 0.001).Conclusion Expression of key enzymes of testosterone synthesis in testis of early diabetic mice decreases significantly.

OBJECTIVETo establish of acute respiratory distress syndrome (ARDS) model in canine after inhalation of perfluoroisobutylene (PFIB), and to observe the progressing of lung injury, and to study the mechanisms of injury.

METHODSA device of inhalation of PFIB for canine was made. The concentration of PFIB was 0.30 - 0.32 mg/L. Serum IL-6 and IL-8 were dynamically measured. Clinical manifestations, pathology of organs in canine were observed.

RESULTS(1) During inhalation, the concentration of PFIB remained stable; (2) After inhalation, blood arterial oxygen partial pressure fell gradually, and eventually met the criteria for diagnosing ARDS; (3) The level of IL-8 in serum rises significantly after inhalation (P < 0.05), whereas that of IL-6 was not obviously altered (P > 0.05); (4) Within 6 hours after inhalation, no abnormality in canine was observed, but afterwards symptoms gradually appeared, and typical breath of ARDS, such as high frequency and lower level could be seen in later phase; (5) Pathological examination showed severe congestion, edema and atelectasis in most part of both lungs, and signs of anoxia in other organs.

CONCLUSIONS(1) The device designed is capable of ensuring control of inhalation of PFIB; (2) Exposure to PFIB for 30 mins, canines all met the criteria for diagnosing ARDS 22 hours after inhalation, therefore the modeling is successful; (3) PFIB specifically damages the lung by causing excessive inflammation.

Administration, Inhalation ; Animals ; Disease Models, Animal ; Dogs ; Female ; Fluorocarbons ; toxicity ; Interleukin-6 ; blood ; Interleukin-8 ; blood ; Lung ; drug effects ; pathology ; Male ; Random Allocation ; Respiratory Distress Syndrome, Adult ; blood ; chemically induced