Professor Zhang Yonghong thinks that the deficiency of lung qi always exists in advanced lung cancer cases. Pathogen infection, phlegm and blood stasis are key factors to the occurrence and development of lung cancer. Clinical treatment in advanced lung cancer should emphasize on the benefiting of qi and supplementing the lung as well as reducing phlegm, removing blood stasis and disintoxication. Attention should be paid to both syndrome differentiation and disease differentiation with the combination of strengthening the body resistance and eliminating evil factors according to different stages of lung cancer.

AIM: To observe the expression of COX-2 in rat corneal neovascularization (CNV) and its relationship to CNV, and to explore the inhibition of Celecoxib, a COX-2 inhibitor, to CNV.METHODS: The distribution and quantification of COX-2and VEGF was detected by immunohistochemistry. Expression of COX-2 and VEGF mRNA was quantified by RT-PCR.The difference in protein and mRNA expressions of COX-2and VEGF was analyzed to find the correlation between them.RESULTS: Expression of activated COX-2 and VEGF protein and mRNA in CNV had a dynamic change. VEGF and COX-2co-localized. Compared with the control group, expression of both protein, mRNA of COX-2 and VEGF in experimental group Ⅱ and Ⅲ had significant difference (P＜0.05), indicating the correlation between COX-2 and VEGF, while that in experimental group I had no statistical difference (P＞0.05).CONCLUSION: COX-2 expression was up-regulated in inflammatory CNV. COX-2 modulates the expression of VEGF,playing a very important role in CNV. Celecoxib inhibit COX-2expression so as to hold back the CNV.

Abstract: Objective To collect the cases of laboratory-acquired infections (LAI) reported in literatures in China, summarize the infection routes and causes of LAI in China, in order to improve laboratory staff's understanding of its occupational health and safety risks. Methods　The cases of laboratory-acquired infection reported in domestic literatures were collected from PubMed, CNKI, Wanfang Database, CBM China Biomedical Literature Database up to April 11, 2022, retrospectively analyze the number and causes of LAI reports, the main risk factors of LAI and its harm to society, the consequences of LAI or the leakage of pathogenic microorganisms, and put forward the relevant countermeasures of biological safety. Results　A total of 22 LAI reports were collected, reviewed and integrated into 21 reports. There were 7 kinds of pathogenic microorganisms. The main pathogenic microorganisms were hantavirus (42.86%, n=9) and Brucella (33.33%, n=7). There were 122 cases and 3 deaths in the laboratory. Most of the reports came from research laboratories (66.67%, n=14). The main route of infection was inhalation of aerosol (42.86%, n=9), followed by transdermal route (38.09%, n=8). Conclusions Failure to report LAI events will increase the risk of pathogenic microorganisms spreading to people outside the laboratory and the environment through infected laboratory staff. Local health institutions and laboratories should be encouraged to report LAI cases as a powerful tool for monitoring accidental leakage of pathogenic microorganisms and further improving laboratory biosafety. The laboratory needs strong biosafety measures to protect staff's health and prevent environmental pollution caused by accidental leakage of pathogenic microorganisms.

Objective To evaluate the subject's absorbed dose,equivalent dose and effective dose.Methods The CBCT unit was Implagraphy and three scan projections were selected such as mandible,maxilla and temporamandibular joint (TMJ).Thermoluminescent dosimeter tubes were used to record the absorbed dose at special positions in the head and neck region of an adult skull and tissue-equivalent phantom.16 interested organs included pituitary,lens,parotid glands,submandibular glands,sublingual glands、diploe,spongy bone of the chin and cervical vertebra,skins of cheeks and nuchal region,thyroid and esophagus.The absorbed dose was measured in these organs,and then the effective dose(E1990,E2007)were calculated according to different ICRP tissue weighting factors.Results The absorbed dose of mandible,maxilla and TMJ scan varied from (0.99 ±0.09) to (12.85 ±0.09)mGy,(0.93 ±0.01) to (13.07 ±0.02) mGy and (0.68 ±0.01) to (10.18 ± 0.04)mGy.There was significant difference among the three scan projections (F =19.61-30992.27,p ＜ 0.05).The equivalent doses of lens and skin were (1.11± 0.07)-(5.76 ± 0.06) mSv and (6.96 ± 0.06)-(10.64 ± 0.07) mSv.There was significant difference among the three scan projections(F =4473.02,9385.50,P ＜0.05).The effective dose(E1990,E2oo7) was [(191.35±1.53),(325.17 ±2.58) μSv] for mandible scan,[(106.62 ±2.17),(226.28 ±2.81)μSv] for maxilla scan,[(104.21 ± 1.02),(142.36 ± 1.90) μSv]for TMJ scan,respectively.Conclusions The valid measurement should be taken to reduce the subject' s dose such as a careful history and clinical examination before the performance of CBCT,the latest risk/benefit assessment,precise scan position,the shielding of thyroid as well as brain and the smaller volume size as well.

Objective The tissue-engineered composite graft was formed with induced marrow-derived stromal cells (MSCs)and PLGA double-layer scaffold. The effectiveness of this graft for the repair of osteochondral defects in the knee of rabbits was investigated. Methods MSCs were isolated from 20 adult rabbits with density gradient centrifugation and was divided into two groups. In group A, the MSCs were cultivated with regular medium. In group B they were cultivated with chondrogenic differentiation medium. The mRNA of MSCs and articular cartilage cells were extracted, and the expression of mRNA for type Ⅰ and Ⅱ collagen was tested by RT-PCR. The distribution and compound of MSCs with PLGA double-layer scaffold was examined with scanning electron microscopy. 28 adult rabbits were divided into 3 groups, osteochondral defect of 3.5 mm in diameter and 3 to 4 mm in depth were created in the patellar groove. Group A (10 rabbits), the MSCs cultivated with regular medium was grafted into the defects. In group B (10 rabbits), the MSCs cultivated with chondrogenic differentiation medium was grafted into the defects. In group C (8 rabbits), the defects were repaired with autologous osteochondral grafts as control. Specimens were harvested at 4th, 8th, 16th and 24th week post operation respectively, histological examination was performed and graded. Results For the MSCs cultivated with regular medium, the expression of mRNA for type Ⅰ collagen was found with RT-PCR, but no expression for Ⅱ collagen was found. For the induced MSCs, the expression of mRNA both for type Ⅰ and type Ⅱ collagen were found. The adhesion and growth of MSCs on the PLGA double-layer scaffold were well visualized with scanning electron microscopy, and some cells were found in the deep porotic area. For the specimens of group B, no significant difference was found comparing with normal cartilage at 24th week, and the specimens were defined as matured hyaline-like cartilage(4/6)with histological examination, superior to those specimens of group A (1/4). Conclusion The MSCs have osteogenic and chondrogenic potentiality. Combined with PLGA double-layer scaffold, it can be served as seeded cell to form tissue-engineered composite grafts, which can be used to repair osteochondral defects in rabbit models.

Objective:To explore the effects of double circumferential fibrotomy(CF)in the improvement of periodontal attachment of the teeth with periodontal disease.Methods:22 migrated incisors of 4 adults were randomly assigned to one-time CF group (T1 )and double CF group(T2)by center line.Periapical intraoral radiographic examination was performed using paralleling technique at pre-and post-leveling-alignment stage of the teeth.Root length,crown-root ratio and the distance of CEJ-AC were measured.The periodontal in-dicators were also recorded during the orthodontic treatment.Data were statistically analysed by comparative t-test.Results:CEJ-AC and crown root ratio reduction was greater in T2 group than those in T1 group(P <0.01 ),but the periodontal indices did not show sig-nificant difference between the 2 groups(P >0.05).Conclusion:Double circumferential fibrotomy can improve periodontal attachment, reasonable orthodontic force does not lead to remarkable root resorption of the periodontitis inflicted teeth.

AIM: To establish HPLC for determination of 2,3,5,4′tetrahydroxystilbene-?-O-?-D-glucoside in Radix polygoni multiflori preparata. METHODS: The column was diamonsil C_(18)(5 ?m,4.6 mm?250 mm).The mobile phase was CH_3CN-CH_3OH-H_2O(10∶20∶70) and ?=320 nm.The flow rate was 1.5 ml/min. RESULTS: The linearity was in the range of 0.0253-0.3542 ?g.The average recovery and RSD were 99.34% and 0.49%,respectively. CONCLUSION: The method is simple,precise and reproduciable and can be used for determination of 2,3,5,4′-tetrahydroxystilbene-?-O-?-D-glucoside in Radix polygoni multiflori preparata effectively.

Sleep disorders are common diseases with various dys-function during sleep-wake process, including difficulty falling or staying asleep, falling asleep at inappropriate times, excessive total sleep time, or abnormal behaviors associated with sleep. Sleep disorders can lead to the deposition of amyloid beta protein ( Aβ) by affecting the normal metabolism of amyloid beta protein in the brain. Patients with Alzheimer’s disease ( AD) often suffer from sleep disorders, and its pathology always results in more se-vere sleep disorders, which leads to a risk of cognitive impair-ment and hypofunction. Sleep disorders could interact closely with AD, forming a positive feedback loop, which causes serious damage to the body health. This review summarized the current research about sleep disorder in the onset of AD and the current status of medication.

OBJECTIVE:To establish a method for simultaneous determination of notoginsenoside R1,ginsenoside Rg1 and gin-senoside Rb1 in Shenqi xinshu capsule. METHODS:HPLC was performed on the column of Zorbax SB-C18(150 × 4.6 mm,5 μm) with mobile phase of acetonitrile-water at a flow rate of 1.0 ml/min,detection wavelength was 203 nm,column temperature was 30℃,and the injection volume was 10 μl. RESULTS:The linear range was 0.199 8-3.996 0 μg for notoginsenoside R1,0.842 8-10.143 0 μg for ginsenoside Rg1 and 0.823 4-9.978 0 μg for ginsenoside Rb1;RSDs of precision,stability and reproducibility tests were low-er than 2%;recoveries were 95.17%-100.17%(RSD=1.81%,n=9),97.32%-101.18%(RSD=1.44%,n=9)and 95.22%-98.89%(RSD=1.22%,n=9). CONCLUSIONS:The method is simple,accurate and reproducible,and can be used for the simultaneous contents determination of notoginsenoside R1,ginsenoside Rg1 and ginsenoside Rb1 in Shenqi xinshu capsule.

Objective To explore achillis tendon-sliding procedure and subtalar joint capsula release by the same cut and individualization treatment used in the correction of congenital clubfoot.Methods Forty eight cases (76 feet) of congenital clubfoot who were first visit were treated by achillis tendon-sliding procedure and subtalar joint capsula release by the same cut,meantime,footplate fascia release and transfer of the anterior tibial tenden were made by individualization.Results All cases were followed-up,the average time follow-up was 1 year and 6 months,excellent were 71% and good were 15.7%.Five cases were recurrence and its rate was 6.94%.Conclusions Achillis tendon-sliding procedure and subtalar joint capsula release by the same cut can solve rotation of displacement between calcaneus and talus and individualization treatment can also solve high arch deformity and adduction of foot.This technique is a simple,safe and effective treatment for congenital clubfoot.