Analysis on the influencing factors for re-positive nucleic acid test result in discharged COVID-19 patients in Chengdu / 中国胸心血管外科临床杂志

@#Objective    To analyze the influencing factors for re-positive nucleic acid test in discharged corona-virus disease 2019 (COVID-19) patients in Chengdu, Sichuan Province, and to provide data support for the epidemics prevention and control. Methods    The clinical data of 660 discharged COVID-19 patients from January 23, 2020 to February 28, 2021 in our center were retrospectively analyzed. The patients were divided into two groups according to the reexamination of virus nucleic acid, including a negative group [549 patients, including 428 males and 121 females with a median age of 33.0 (28.0, 48.0) years] and a positive group [111 patients, including 76 males and 35 females with a median age of 39.0 (28.0, 51.0) years]. The clinical data of the two groups were compared. Results     The re-positive rate of the discharged patients was 16.82%. Univariate analysis showed that the re-positive rate of females was higher than that of males (χ2=4.608, P=0.032). The re-positive rate of confirmed patients was higher than that of asymptomatic infected patients (χ2=8.140, P=0.004). The re-positive rate of domestic patients was higher than that of imported patients (χ2=9.178, P=0.002). The counts of CD3+ (P=0.038), CD4+ (P=0.048) and CD8+ (P=0.040) T lymphocytes in the negative group were higher than those in the positive group. The binary logistic regression analysis showed that the clinical classification and CD8+ T lymphocyte count were independent risk factors affecting the recurrence of virility. Conclusion    The gender, origin, T lymphocyte subsets count and clinical type are the influencing factors for re-positive result, and clinical type and CD8+ T lymphocyte count are the independent influencing factors for re-positive result. Therefore, improving the immunity of infected patients, as well as early detection and timely treatment are effective means to reduce the re-positive occurrence.

Mechanism of Arnebia euchroma Against Melanoma： An Exploration Based on Network Pharmacology and Experimental Verification / 中国实验方剂学杂志

ObjectiveTo preliminarily predict the active components， action targets， and signaling pathways of Arnebia euchroma in the treatment of melanoma based on network pharmacology and molecular docking， and to verify its possible mechanism of action in in vitro experiments. MethodThe active components and related targets of A. euchroma were retrieved from the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform （TCMSP）SwissTargetPrediction and literature， and the targets related to melanoma from the GeneCards， Online Mendelian Inheritance in Man （OMIM）， and Comparative Toxicogenomics Database （CTD）. Following the construction of the protein-protein interaction （PPI） network of active components and related targets of A. euchroma and melanoma-related targets using STRING， Cytoscape 3.8.2 was used for screening and analyzing the nodes in the network of A. euchroma against melanoma. The intersections were subjected to gene ontology （GO） and Kyoto encyclopedia of genes and genomes （KEGG） enrichment analysis using DAVID 6.8. Acetyl alkannin， the active component in A. euchroma， was docked to the target by AutoDock Vina 1.1.2. The in vitro experiments were then carried out to verify the anti-melanoma effect of A. euchroma. ResultA total of 271 common targets of A. euchroma and melanoma were harvested， among which 23 were key targets， including matrix metalloproteinase-9 （MMP-9） and Janus kinase 2 （JAK2）. As revealed by KEGG enrichment analysis， A. euchroma mainly acted on Janus kinase/signal transduction and activator of transcription （JAK/STAT）， tyrosine kinase receptor （ErbB）， and vascular endothelial growth factor （VEGF） signaling pathways to resist melanoma. According to molecular docking， acetyl alkannin exhibited a good docking activity with JAK2， STAT3， VEGF， MMP-9， and E-cadherin receptors. The results of Western blot and Real-time quantitative polymerase chain reaction （Real-time PCR） showed that acetyl alkannin at different doses inhibited the protein and gene expression of JAK2， STAT3， VEGF， MMP-9， and E-cadherin in A375 cells （P<0.05）. ConclusionA. euchroma alleviates melanoma via multiple targets and multiple pathways， and it may exert the therapeutic effects by affecting the expression of such key target proteins as JAK2， STAT3， VEGF， MMP-9， and E-cadherin and inhibiting the invasion and metastasis of melanoma cells. This study has provided an experimental basis for the treatment of tumor with A. euchroma.

Comparative Toxicity of Nanomaterials to Air-blood Barrier Permeability Using an In Vitro Model / 生物医学与环境科学（英文）

OBJECTIVE@#To comparatively study the toxicity of four metal-containing nanoparticles (MNPs) and their chemical counterparts to the air-blood barrier (ABB) permeability using an in vitro model.@*METHODS@#ABB model, which was developed via the co-culturing of A549 and pulmonary capillary endothelium, was exposed to spherical CuO-NPs (divided into CuO-40, CuO-80, and CuO-100 based on particle size), nano-Al2O3 (sheet and short-rod-shaped), nano-ZnO, nano-PbS, CuSO4, Al2(SO4)3, Zn(CH3COO)2, and Pb(NO3)2 for 60 min. Every 10 min following exposure, the cumulative cleared volume (ΔTCL) of Lucifer yellow by the model was calculated. A clearance curve was established using linear regression analysis of ΔTCL versus time. Permeability coefficient (P) was calculated based on the slope of the curve to represent the degree of change in the ABB permeability.@*RESULTS@#The results found the increased P values of CuO-40, CuO-80, sheet, and short-rod-shaped nano-Al2O3, Al2(SO4)3, and Pb(NO3)2. Among them, small CuO-40 and CuO-80 were stronger than CuO-100 and CuSO4; no difference was observed between Al2(SO4)3 and sheet and short-rod-shaped nano-Al2O3; and nano-PbS was slightly weaker than Pb(NO3)2. So clearly the MNPs possess diverse toxicity.@*CONCLUSION@#ABB permeability abnormality means pulmonary toxicity potential. More studies are warranted to understand MNPs toxicity and ultimately control the health hazards.

Cardioprotective effect of Danshen injectable powder on pressure overload-induced ventricular remodeling in rats and isoproterenol induced myocardial injury in mice / 中国药理学与毒理学杂志

OBJECTIVE To determine the effects of Danshen injectable powder on myocardial remodeling in pressure overload rats and isoproterenol(ISO)injection mice.METHODS SD Rats were subject to abdominal aortic constriction(AAC)surgery to develop pressure overload.Therapeutic effect of Danshen injectable powder was assessed six weeks after AAC surgery. The lactic dehydrogenase (LDH) and creatine kinase (CK) levels in serum, biometric, echocardiographic parameters, interstitial fibrosis, the expression of DJ-1 and SOD2 were then measured. The myocardial impairment in mice was induced by ISO injection. LDH and CK in serum, biometric, interstitial fibrosis were measured to investigate the cardioprotective effect of Danshen injectable powder. Matrix-assisted laser desorption mass spectrometry imaging(MALDI-MSI)was used to detect the changes of 60-1000 Da molecules in mice heart tissue. RESULTS In AAC rats, we observed compensatory hypertrophy and perivascular fibrosis,however cardiac function had not progressed to deterioration.The levels of LDH and CK were decreased significantly in the Danshen injectable powder groups(P<0.05,P<0.05).Danshen injectable powder could alleviate the perivascular collagen deposits but not cardiac hypertrophy in AAC rats. Furthermore,Danshen injectable powder enhanced the expression levels of SOD2 and DJ-1 in cardio-myocytes (P<0.05, P<0.01). In ISO injection mice, the levels of HWI and LDH were decreased signifi-cantly in drug treatment group compared with model group (P<0.01, P<0.01). In the MALDI-MSI of mice heart section,Danshen injectable powder can improve the reduction of energy metabolism-related substances including adenosine, creatine and ADP induced by ISO impairment. CONCLUSION Danshen injectable powder can attenuate perivascular fibrosis and improve the expression of anti-oxidative stress-related proteins SOD2,DJ-1 in the rats with pressure overload-induced left ventricular remodeling.Danshen injectable powder has cardioprotective effect on ISO impairment in mice which is probably related to improvement of energy metabolism.

Exploring the clinical characters of Shugan Jieyu capsule through text mining / 中国中药杂志

The study was main to explore the clinical characters of Shugan Jieyu capsule through text mining. The data sets of Shugan Jieyu capsule were downloaded from CMCC database by the method of literature retrieved from May 2009 to Jan 2016. Rules of Chinese medical patterns, diseases, symptoms and combination treatment were mined out by data slicing algorithm, and they were demonstrated in frequency tables and two dimension based network. Then totally 190 literature were recruited. The outcomess suggested that SC was most frequently correlated with liver Qi stagnation. Primary depression, depression due to brain disease, concomitant depression followed by physical diseases, concomitant depression followed by schizophrenia and functional dyspepsia were main diseases treated by Shugan Jieyu capsule. Symptoms like low mood, psychic anxiety, somatic anxiety and dysfunction of automatic nerve were mainy relieved bv Shugan Jieyu capsule.For combination treatment. Shugan Jieyu capsule was most commonly used with paroxetine, sertraline and fluoxetine. The research suggested that syndrome types and mining results of Shugan Jieyu capsule were almost the same as its instructions. Syndrome of malnutrition of heart spirit was the potential Chinese medical pattern of Shugan Jieyu capsule. Primary comorbid anxiety and depression, concomitant comorbid anxiety and depression followed by physical diseases, and postpartum depression were potential diseases treated by Shugan Jieyu capsule.For combination treatment, Shugan Jieyu capsule was most commonly used with paroxetine, sertraline and fluoxetine.

Effect of chloroform extracts from Longdan Xiegan decoction in inhibiting hydrolytic enzyme activity of Candida albicans isolated from VVC patients / 中国中药杂志

To investigate the inhibitory effect and mechanism of chloroform extracts from Longdan Xiegan decoction(CELX) against hydrolytic enzymes activity of Candida albicans isolated from vulvovaginal candidiasis(VVC) patients. Secreted aspartyl proteinase(Sap), phospholipase(PL) and lipase(Lip) positive strains were identified from 15 strains of C. albicans with milk culture medium, egg yolk culture medium and tween-80 medium, respectively. Then, the activities of Sap, PL, and Lip were detected in the above media. qRT-PCR was used to detect the changes in gene expressions of aspartic protease(SAP1-7,10), phospholipase B(PLB1-2) and lipase(LIP3-6). Secreted aspartyl proteinase and phospholipase of 15 VVC clinical strains were positive, and lipase of 11 strains were positive. Compared with the blank control group, the drug CELX-containing medium(milk medium, egg yolk culture medium, tween-80 medium) experiment showed that the sedimentation of colonies decreased gradually in each culture medium with the increase of CELX dose. When the concentration of CELX was 256 mg•L⁻¹, the colony almost disappeared, which indicated the enzyme activity was significantly weakened. The results of qRT-PCR showed that SAP1, SAP2, SAP3, SAP4, SAP7, SAP9 and SAP10 were down-regulated by 62%, 55%, 62%, 84%, 61%, 51%, 68%, respectively, except for SAP5 and SAP6; and PLB1, LIP3, LIP4, LIP6 were down-regulated by 67%, 51%, 54%, 55%, respectively. The findings suggested that CELX may inhibit the activities of Sap, PL, and Lip, which are important virulence factors of C. albicans.

Combination of acupressure and magnetic sticker improved the quality of life in patients with advanced gastroenteric tumor: a clinical observation / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To explore the clinical effect of combination of acupressure and magnetic sticker on the quality of life (QOL) including appetite, defecation, and sleep in patients with advanced gastroenteric tumor.</p><p><b>METHODS</b>Totally 147 patients with advanced gastroenteric tumor were assigned to 4 groups according to different treatment methods, i.e., the supportive treatment group (A, 20 cases), the acupressure treatment group (B, 41 cases), the magnetic sticker treatment group (C, 40 cases), and a combination of acupressure and magnetic sticker treatment group (D, 46 cases). They were respectively treated with different methods, supportive treatment for group A, acupressure for group B, magnetic sticker for group C, and a combination of acupressure and magnetic sticker for group D. The scores of food intake, defecation frequency, sleep time, Karnofsky, and QOL were compared before treatment and at day 14 after treatment.</p><p><b>RESULTS</b>After treatment, the scores of food intake, defecation frequency, and sleep time were obviously improved in B, C and D groups (P < 0.01). There was statistical difference between group D and group A (P < 0.01). In addition, in comparison with A group, both Karnofsky score and QOL score increased in B, C and D groups (P < 0.01).</p><p><b>CONCLUSION</b>The assisted therapy of the combination of acupressure and magnetic sticker could ameliorate QOL such as the digestive functions and sleep in patients with advanced gastroenteric tumor.</p>

Effect of combination of sub-MIC sodium houttuyfonate and erythromycin on biofilm of Staphylococcus epidermidis / 中国中药杂志

<p><b>OBJECTIVE</b>To observe the effect of the combination of sub-MIC sodium houttuyfonate and erythromycin on biofilm of Staphylococcus epidermidis.</p><p><b>METHOD</b>The serial dilution method was adopted to determine MIC of the combination of sodium houttuyfonate and erythromycin on S. epidermidis; the checkerboard method was used to evaluate the combination of sodium houttuyfonate and erythromycin on suspended bacteria of S. epidermidis; S. epidermidis biofilm was built in vitro, and XTT reduction assay was used to evaluate the effect of the combination of sub-MIC sodium houttuyfonate and erythromycin on the adhesion of S. epidermidis and bacterial metabolism inside the biofilm. Microscope was applied to observe the impact the single administration and combination of the two medicines under sub-MIC on biofilm morphology of S. epidermidis.</p><p><b>RESULT</b>The MIC of sodium houttuyfonate and erythromycin were 62.5, 7.812 5 mg x L(-1), respectively. The combination of 1/8MIC sodium houttuyfonate and 1/2MIC erythronmycin showed a synergistic effect on S. epidermidis. Sodium houttuyfonate, erythromycin and their combination had an inhibitory effect on the adhesion and metabolism of S. epidermidis biofilm bacteria, and made impact on the morphology of S. epidermidis biofilm.</p><p><b>CONCLUSION</b>The sub-MIC sodium houttuyfonate and erythromycin have an inhibitory effect on S. epidermidis biofilm. The combination of sodium houttuyfonate and erythromycin shows a synergistic effect in inhibiting suspended bacteria and biofilm of S. epidermidis, particularly in inhibiting the metabolism of S. epidermidis biofilm bacteria and impacting the morphology of biofilm.</p>

Inducement effect of ginsenoside Rg3 on apoptosis of human bladder transitional cell carcinoma cell line EJ / 中国中药杂志

<p><b>OBJECTIVE</b>To explore the effect of Rg3 on inhibiting and inducing apoptosis of bladder cancer cells.</p><p><b>METHOD</b>The bladder cancer cell line EJ was treated with Rg3 of various concentrations. Cell proliferation was measured by MTT assay. Morphological changes of cells were observed by fluorescent staining of Hoechst 33258. Cell cycle and apoptosis rate were analyzed by flow cytometry (FCM). The expression of caspase-3 in cells was detected by immunocytochemistry. DNA ladder was showed by agarose gel electrophoresis.</p><p><b>RESULT</b>Rg3 inhibited proliferation of EJ cells in a manner of concentration-dependent relationship, IC50 of Rg3 in 48 h treatment was 125.5 mg x L(-1) to EJ cells. When treated with 150 mg x L(-1) of Rg3 for 24 h and 48 h, the cells showed apoptotic morphological characteristics including the condensed chromatin, the nuclear fragmentation, the apoptotic body and bright fluorescent granules as well as a higher caspase-3 expression. FCM assay indicated that Rg3 regulated cell cycle and induced apoptosis of EJ cells. When treated for 24 h and 48 h with 75 mg x L(-1) of Rg3 as well as for 48 h with 150 mg x L(-1) of Rg3, the percentages of cells in S phase and G2/M phase were increased, whereas the percentage of cells in G0-G1 was decreased. The apoptosis rates were increased from (1.05 +/- 0.17)% in control group cells to (8.41 +/- 0.98)%, (18.57 +/- 2.20)% and (33.98 +/- 1.64)%, respectively. Remarkable DNA ladders were revealed. The effects showed a manner in dose and time dependent of Rg3.</p><p><b>CONCLUSION</b>The results suggest that ginsenoside Rg3 exerts an inhibiting effect on proliferation of EJ cells by inducing apoptosis.</p>

Clinical value of 24-hour ambulatory electrocardiography in childhood myocarditis / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To investigate the characteristics of 24-hr ambulatory electrocardiography (DCG) of children with myocarditis and to study the clinical value of DCG in the diagnosis of childhood myocarditis.</p><p><b>METHODS</b>24-hr DCG findings, including abnormal DCG rate, and number, grade and distribution of ventricular premature beat (PVC), as well as heart rate variability, from 59 children with myocarditis were retrospectively reviewed and compared with those detected in 41 children without heart disease.</p><p><b>RESULTS</b>86.4% of patients with myocarditis showed abnormal DCG, and compound arrhythmia was commonly seen, but only 46.3% showed abnormal DCG (P < 0.01) and single arrhythmia was predominant in the control group. The number and grade of PVC/24 hrs were not significantly different between the two groups. Compared with the control group, the average pattern PVC was predominant in the myocarditis group (84.6% vs 48.7%; P < 0.05). Monopeak pattern PVC was mostly seen (64.4%), followed by multiple-peak pattern (25.4%) and bi-peak pattern (8.4%) in the myocarditis group, which were significantly different from the control group: monopeak pattern 53.6%, bi-peak pattern 36.6% and multiple-peak pattern 7.3% (P < 0.01).</p><p><b>CONCLUSIONS</b>The 24-hr DCG characteristics of children with myocarditis are different from the normal controls, suggesting 24-hr DCG monitoring is useful to the diagnosis of childhood myocaditis.</p>

The histological research between the mode of invasion and cervical lymph node metastasis in squamous cell carcinoma of the oral cavity / 华西口腔医学杂志

<p><b>OBJECTIVE</b>The relationship between the mode of tumor invasion in the tumor-host borderline and the frequency of cervical lymph node metastasis was investigated in squamous cell carcinoma of the oral cavity.</p><p><b>METHODS</b>200 cases with histologically proven squamous cell carcinoma of the oral cavity were studied by histological method with HE stained. The mode of invasion in the tumor-host relationship was classified into five grades by Yamamoto's criteria.</p><p><b>RESULTS</b>With regard to the relationship between the mode of invasion and metastasis, the more invasive the tumor tissue was, the more frequent the metastasis formed (P < 0.001). The frequency of metastasis in grades 1 and 2 was low (0 and 5.9%, respectively), The frequency of metastasis in grades 3 was moderate (14.3%), and that in grades 4c and 4d was highly rapid (63.0% and 82.9%, respectively). Single node metastases were frequent in grade 3 and grade 4c (66.7% and 58.8%, respectively), while plural node metastases were frequent in grade 4d (70.6%, P < 0.05). Moreover, the distribution of metastasized lymph nodes was focused on level 1 (41.2%) or level 1 and 2 (79.4%) in grade 4c and was dispersed from level 1 to 4 in grade 4d (P < 0.05). In the present study, the degree of differentiation did not correlate well with the frequency of metastasis.</p><p><b>CONCLUSION</b>These results indicate that the more invasive the tumor cells were to the host, the more frequent the metastasis formed. The different mode of invasion would accompany with different frequency of metastasis, different number and distribution of metastasized lymph nodes.</p>

The regulation of nm23-H1/NDPK-A in different processes of regional lymph node metastases of oral squamous cell carcinomas / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To study the regulation and effect of the expression of nm23-H1 gene in different processes of regional lymph node metastases of oral squamous cell carcinomas(OSCC).</p><p><b>METHODS</b>By immunohistochemical analysis in 200 paraffin-embedded tissues of OSCC and Western Blot in 9 fresh tissues of OSCC using a monoclonal antibody, the expression of nm23-H1/NDPK-A were detected in dividing groups accompanied with the clinical and pathological data of cervical lymph node metastases and modes of invasion.</p><p><b>RESULTS</b>The rates of negative expression of nm23-H1/NDPK-A had significant differences between metastatic cases(34/81) and non-metastatic cases(15/119). The nm23-H1/NDPK-A negative group showed higher frequency of lymph node metasteses (P < 0.01). In the different metastatic processes, There were significantly differential expressions of nm23-H1/NDPK-A among stage N0, N1 and N2(P < 0.01), distinct involved quantities of lymph nodes (P < 0.01), dissimilar metastatic involved levels(P < 0.05), definite modes of invasion(P < 0.01) and different cell differentiations(P < 0.01). There were much higher negative expressions in those cases of N1 stage(23/38), only one lymph node to be involved(23/39), metastasized to submandibular nodes or/and superior deep cervical nodes(17/28 and 12/29, respectively), IV c types of invasion(33/54) and poor differentiations(9/19).</p><p><b>CONCLUSION</b>The results indicated that nm23-H1/NDPK-A played an more important role in switching the initial metastases formation than in influencing the later metastases spread because the negative expressions of nm23-H1/NDPK-A in solid tumors of OSCC would induce the formation of high metastatic cellular subpopulations. It was also confirmed that nm23-H1 gene might be a metastatic suppressor and may be useful in predicting the initial lymph node metastases in OSCC.</p>

The aquation of oxaliplatin and the effect of acid / 药学学报

<p><b>AIM</b>To investigate the aquation of oxaliplatin in aqueous solution at different temperatures and gain the kinetic data.</p><p><b>METHODS</b>Electronic conductometry and high performance liquid chromatography (HPLC) were used to measure the oxaliplatin content in the reaction systems at different time.</p><p><b>RESULTS</b>The aquation of oxaliplatin followed a pseudo-first-order rate law. In the absence of H+, the observed rate constant kobs was 7.76 x 10(-6).min-1 and the half life t1/2 was 62 days at 25 degrees C. In the presence of H+, the aquation could be accelerated by H+ according to the equation kobs = (2.61 + 21.9 [H+]) x 10(-4).min-1. The mechanism of aquation has also been proposed in this paper. From the mechanism, the rate of aquation following to r = (k1 k2) [l-OHP]/k-1 in the absence of H+ and r = (k1 + K0k3 [H+]) [l-OHP] in the presence of H+ have been deduced, which were in perfect agreement with the experimental results.</p><p><b>CONCLUSION</b>In the absence of H+, the aqueous solution of oxaliplatin is stable, which meets to the request of clinical.</p>

Clinical application of stereotactic radiotherapy in treatment of lung cancer / 第三军医大学学报

Objective　To study the indication, contraindication and short-term clinical effects of stereotactic radiotherapy (X-knife) in lung cancer. Methods　A total of 56 cases (Treatment group) of lung cancer were treated with X-knife composing of the modern 3-D treatment planning system and the stereotactic body frame, and SL-75 accelerator. And another 53 cases only treated with routine external radiation served as the control. In treatment group, 42 cases received 50 Gy radiation, at 2 Gy per day, 5 d per week in the upper mediastinum, hilus of lung, below the primary focus first and then underwent X-knife for the primary focuses, and other 14 recurrent and metastatic cases received irradiation of 8-12 Gy per day, 5 d by X-knife alone. Results　The actually reexamination rate for 1, 3, 6, and 12 months after X-knife treatment in 78 focuses from 56 cases was 79.5% (62/78), 89.8% (70/78), 87.2% (68/78) and 78.2% (61/78) respectively. The focuses reappeared in 3 months after the treatment and the growth rates of focus in 3, 6, and 12 month after the treatment were 2.6% (2/78), 5.1% and 9% (7/78) respectively. There were 2 focuses received a second treatment with X-knife because no change after the first one. Both the 1-and 2-year survival rates of 36 cases of the primary lung cancer in the treatment group were higher than that of control group (89.1%, 53.9% and 77.4%, 39.6%). Conclusion　The stereotactic radiotherapy is of applicable and prospective in the treatment of lung cancer. The indications include: ①As a boost dose in case when primary focus is less than 5 cm after the first external radiotherapy may reduce the exposure of lung tissue to x-ray and the occurrence of radiation pneumonia; ②Treatment for the recurrence after radiotherapy and operation; ③Radical treatment for the metastatic focus less than 5 cm. Attention must be paid to when multiple treatment is carried on the volume of the focus, the Karnofsky scores and the general condition when stereotactic radiotherapy combined with X-knife for lung cancer.

Clinical application of stereotactic radiotherapy in treatment of lung cancer / 第三军医大学学报

Objective　To study the indication, contraindication and short-term clinical effects of stereotactic radiotherapy (X-knife) in lung cancer. Methods　A total of 56 cases (Treatment group) of lung cancer were treated with X-knife composing of the modern 3-D treatment planning system and the stereotactic body frame, and SL-75 accelerator. And another 53 cases only treated with routine external radiation served as the control. In treatment group, 42 cases received 50 Gy radiation, at 2 Gy per day, 5 d per week in the upper mediastinum, hilus of lung, below the primary focus first and then underwent X-knife for the primary focuses, and other 14 recurrent and metastatic cases received irradiation of 8-12 Gy per day, 5 d by X-knife alone. Results　The actually reexamination rate for 1, 3, 6, and 12 months after X-knife treatment in 78 focuses from 56 cases was 79.5% (62/78), 89.8% (70/78), 87.2% (68/78) and 78.2% (61/78) respectively. The focuses reappeared in 3 months after the treatment and the growth rates of focus in 3, 6, and 12 month after the treatment were 2.6% (2/78), 5.1% and 9% (7/78) respectively. There were 2 focuses received a second treatment with X-knife because no change after the first one. Both the 1-and 2-year survival rates of 36 cases of the primary lung cancer in the treatment group were higher than that of control group (89.1%, 53.9% and 77.4%, 39.6%). Conclusion　The stereotactic radiotherapy is of applicable and prospective in the treatment of lung cancer. The indications include: ①As a boost dose in case when primary focus is less than 5 cm after the first external radiotherapy may reduce the exposure of lung tissue to x-ray and the occurrence of radiation pneumonia; ②Treatment for the recurrence after radiotherapy and operation; ③Radical treatment for the metastatic focus less than 5 cm. Attention must be paid to when multiple treatment is carried on the volume of the focus, the Karnofsky scores and the general condition when stereotactic radiotherapy combined with X-knife for lung cancer.

Clinical application of stereotactic radiotherapy in treatment of lung cancer / 第三军医大学学报

Objective　To study the indication, contraindication and short-term clinical effects of stereotactic radiotherapy (X-knife) in lung cancer. Methods　A total of 56 cases (Treatment group) of lung cancer were treated with X-knife composing of the modern 3-D treatment planning system and the stereotactic body frame, and SL-75 accelerator. And another 53 cases only treated with routine external radiation served as the control. In treatment group, 42 cases received 50 Gy radiation, at 2 Gy per day, 5 d per week in the upper mediastinum, hilus of lung, below the primary focus first and then underwent X-knife for the primary focuses, and other 14 recurrent and metastatic cases received irradiation of 8-12 Gy per day, 5 d by X-knife alone. Results　The actually reexamination rate for 1, 3, 6, and 12 months after X-knife treatment in 78 focuses from 56 cases was 79.5% (62/78), 89.8% (70/78), 87.2% (68/78) and 78.2% (61/78) respectively. The focuses reappeared in 3 months after the treatment and the growth rates of focus in 3, 6, and 12 month after the treatment were 2.6% (2/78), 5.1% and 9% (7/78) respectively. There were 2 focuses received a second treatment with X-knife because no change after the first one. Both the 1-and 2-year survival rates of 36 cases of the primary lung cancer in the treatment group were higher than that of control group (89.1%, 53.9% and 77.4%, 39.6%). Conclusion　The stereotactic radiotherapy is of applicable and prospective in the treatment of lung cancer. The indications include: ①As a boost dose in case when primary focus is less than 5 cm after the first external radiotherapy may reduce the exposure of lung tissue to x-ray and the occurrence of radiation pneumonia; ②Treatment for the recurrence after radiotherapy and operation; ③Radical treatment for the metastatic focus less than 5 cm. Attention must be paid to when multiple treatment is carried on the volume of the focus, the Karnofsky scores and the general condition when stereotactic radiotherapy combined with X-knife for lung cancer.