Synthetic musks in the natural environment: Sources, occurrence, concentration, and fate-A review of recent developments (2010-2023).

Synthetic musks (SMs) have served as cost-effective substitutes for natural musk compounds in personal care and daily chemical products for decades. Their widespread use has led to their detection in various environmental matrices, raising concerns about potential risks. Despite numerous studies on SM levels in different natural environments, a systematic review of their contemporary presence is lacking. This review aims to address this gap by summarising recent research developments on SMs in diverse natural environments, including river water, lake water, seawater, estuarine water, groundwater, snow, meltwater, sediments, aquatic suspended matter, soils, sands, outdoor air, and atmospheric particulate matter. Covering the period from 2010 to 2023, the review focuses on four SM categories: nitro, polycyclic, macrocyclic, and alicyclic. It systematically examines their sources, occurrences, concentrations, spatial and temporal variations, and fate. The literature reveals widespread detection of SMs in the natural environment (freshwater and sediments in particular), with polycyclic musks being the most studied group. Both direct (e.g., wastewater discharges) and indirect (e.g., human recreational activities) sources contribute to SM presence. Levels of SMs vary greatly among studies with higher levels observed in certain regions, such as sediments in Southeast Asia. Spatial and temporal variations are also evident. The fate of SMs in the environment depends on their physicochemical properties and environmental processes, including bioaccumulation, biodegradation, photodegradation, adsorption, phase exchange, hydro-dilution effects. Biodegradation and photodegradation can decrease SM levels, but may produce more persistent and eco-toxic products. Modelling approaches have been employed to analyse SM fate, especially for indirect processes like photodegradation or long-distance atmospheric transport. Future studies should further investigate the complex fate if SMs and their environmental influence. This review enhances understanding of SM status in the natural environment and supports efforts to control environmental contamination.

Artificial intelligence for detecting and delineating the extent of superficial esophageal squamous cell carcinoma and precancerous lesions under narrow-band imaging (with video).

BACKGROUND AND AIMS: Although narrow-band imaging (NBI) is a useful modality for detecting and delineating esophageal squamous cell carcinoma (ESCC), there is a risk of incorrectly determining the margins of some lesions even with NBI. This study aimed to develop an artificial intelligence (AI) system for detecting superficial ESCC and precancerous lesions and delineating the extent of lesions under NBI. METHODS: Nonmagnified NBI images from 4 hospitals were collected and annotated. Internal and external image test datasets were used to evaluate the detection and delineation performance of the system. The delineation performance of the system was compared with that of endoscopists. Furthermore, the system was directly integrated into the endoscopy equipment, and its real-time diagnostic capability was prospectively estimated. RESULTS: The system was trained and tested using 10,047 still images and 140 videos from 1112 patients and 1183 lesions. In the image testing, the accuracy of the system in detecting lesions in internal and external tests was 92.4% and 89.9%, respectively. The accuracy of the system in delineating extents in internal and external tests was 88.9% and 87.0%, respectively. The delineation performance of the system was superior to that of junior endoscopists and similar to that of senior endoscopists. In the prospective clinical evaluation, the system exhibited satisfactory performance, with an accuracy of 91.4% in detecting lesions and an accuracy of 85.9% in delineating extents. CONCLUSIONS: The proposed AI system could accurately detect superficial ESCC and precancerous lesions and delineate the extent of lesions under NBI.

A semi-supervised material quantitative intelligent imaging algorithm for spectral CT based on prior information perception learning / 南方医科大学学报

OBJECTIVE@#To propose a semi-supervised material quantitative intelligent imaging algorithm based on prior information perception learning (SLMD-Net) to improve the quality and precision of spectral CT imaging.@*METHODS@#The algorithm includes a supervised and a self- supervised submodule. In the supervised submodule, the mapping relationship between low and high signal-to-noise ratio (SNR) data was constructed through mean square error loss function learning based on a small labeled dataset. In the self- supervised sub-module, an image recovery model was utilized to construct the loss function incorporating the prior information from a large unlabeled low SNR basic material image dataset, and the total variation (TV) model was used to to characterize the prior information of the images. The two submodules were combined to form the SLMD-Net method, and pre-clinical simulation data were used to validate the feasibility and effectiveness of the algorithm.@*RESULTS@#Compared with the traditional model-driven quantitative imaging methods (FBP-DI, PWLS-PCG, and E3DTV), data-driven supervised-learning-based quantitative imaging methods (SUMD-Net and BFCNN), a material quantitative imaging method based on unsupervised learning (UNTV-Net) and semi-supervised learning-based cycle consistent generative adversarial network (Semi-CycleGAN), the proposed SLMD-Net method had better performance in both visual and quantitative assessments. For quantitative imaging of water and bone materials, the SLMD-Net method had the highest PSNR index (31.82 and 29.06), the highest FSIM index (0.95 and 0.90), and the lowest RMSE index (0.03 and 0.02), respectively) and achieved significantly higher image quality scores than the other 7 material decomposition methods (P < 0.05). The material quantitative imaging performance of SLMD-Net was close to that of the supervised network SUMD-Net trained with labeled data with a doubled size.@*CONCLUSIONS@#A small labeled dataset and a large unlabeled low SNR material image dataset can be fully used to suppress noise amplification and artifacts in basic material decomposition in spectral CT and reduce the dependence on labeled data-driven network, which considers more realistic scenario in clinics.

Tumor antigen-loaded dendritic cells combined with cytokine-induced killer (CIK) enhance the killing activity of human esophageal cancer cells by promoting ASK1 activation / 细胞与分子免疫学杂志

Objective To clarify the effect and mechanism of tumor antigen-loaded dendritic cells (Ag-DCs) combined with cytokine-induced killers (CIKs) on the killing of esophageal cancer tumor cells. Methods Peripheral blood DCs and CIKs were induced and cultured, and the DCs were loaded with tumor antigen to obtain Ag-DCs, and Ag-DCs were co-cultured with CIKs. The experiment was divided into CIK group, DC combined with CIK group, Ag-DC combined with CIK group. Flow cytometry was used to detect the phenotype of cells. MTT assay was employed to determine the killing activity against EC9706 cells. Annexin V-FITC/PI double staining was used to detect the apoptosis rate of cells, immunofluorescence staining to detect the expression of phosphorylated apoptotic signal-regulated kinase 1 (p-ASK1) and Western blot analysis to detect the expression of ASK1 pathway related proteins. A nude mouse model of esophageal cancer transplantation tumor was constructed and divided into control group, DC combined with CIK group and Ag-DC combined with CIK group. The corresponding immune cells were injected into the tail vein for treatment and the tumor volume was measured every 2 days. After 21 days, all nude mice were sacrificed with the tumors taken out. HE staining was used to observe the tumor pathological changes and immunohistochemical staining was performed to detect the expression of ki67 and ASK1 in the tumor tissue. Results Comparedwith the CIK group alone and the DC combined with CIK group, the ratio of CD3+ CD8+ and CD3+ CD56+ in the cells significantly increased after Ag-DCs and CIKs co-culture, along with the increased killing rate of EC9706 cells, increased apoptosis rate of EC9706 cells, and the improved activation level of ASK1. Compared with the CIK group and the DC combined with CIK group, the growth of the transplanted tumor in nude mice treated with Ag-DCs combined with CIKs was significantly inhibited, and after 21 days, it was observed that the tumor tissue mass in this group was relatively smaller, with sparsely arranged cells in the tumor tissue and a decline in the positive rate of ki67 in tumor tissue, while the positive rate of ASK1 was significantly increased. Conclusion Co-cultivation of tumor antigen-loaded DCs with CIKs can significantly increase the killing activity of esophageal cancer tumor cells. The mechanism of action may be related to the activation of the ASK1 pathway.

Artificial intelligence for detecting superficial esophageal squamous cell carcinoma under multiple endoscopic imaging modalities: A multicenter study.

BACKGROUND AND AIM: Diagnosis of esophageal squamous cell carcinoma (ESCC) is complicated and requires substantial expertise and experience. This study aimed to develop an artificial intelligence (AI) system for detecting superficial ESCC under multiple endoscopic imaging modalities. METHODS: Endoscopic images were retrospectively collected from West China Hospital, Sichuan University as a training dataset and an independent internal validation dataset. Images from other four hospitals were used as an external validation dataset. The AI system was compared with 11 experienced endoscopists. Furthermore, videos were collected to assess the performance of the AI system. RESULTS: A total of 53 933 images from 2621 patients and 142 videos from 19 patients were used to develop and validate the AI system. In the internal and external validation datasets, the performance of the AI system under all or different endoscopic imaging modalities was satisfactory, with sensitivity of 92.5-99.7%, specificity of 78.5-89.0%, and area under the receiver operating characteristic curves of 0.906-0.989. The AI system achieved comparable performance with experienced endoscopists. Regarding superficial ESCC confined to the epithelium, the AI system was more sensitive than experienced endoscopists on white-light imaging (90.8% vs 82.5%, P = 0.022). Moreover, the AI system exhibited good performance in videos, with sensitivity of 89.5-100% and specificity of 73.7-89.5%. CONCLUSIONS: We developed an AI system that showed comparable performance with experienced endoscopists in detecting superficial ESCC under multiple endoscopic imaging modalities and might provide valuable support for inexperienced endoscopists, despite requiring further evaluation.

Effect of solanine on radiosensitivity of osteosarcoma cells / 中华放射医学与防护杂志

Objective To investigate the effect of solanine on radiosensitivity of osteosarcoma cells. Methods Osteosarcoma cells were treated with solanine, at the same time, radiation treatment was given, cell proliferation was measured by MTT assay, cell apoptosis was measured by flow cytometry, the protein levels of Ki-67, PCNA, Bax and Cleaved Caspase-3 were detected by Western blot and mitochondrial membrane potential was detected by JC-1 method, the ROS level in cells was detected by DCFH-DA method. Radiosensitivity was measured by plate cloning. Results Compared with cells that were not treated with solanine and radiation, the proliferation of osteosarcoma cells and the Ki-67 and PCNA protein levels were decreased after solanine or radiotherapy ( F=55. 165, 50. 667, 23. 389, P<0. 05) ,the apoptotic rate and the level of Bax and Cleaved Caspase-3 protein increased ( F=54. 588, 42. 924, 51. 541, P<0. 05), the mitochondrial membrane potential decreased (F=40. 762, P<0. 05), and the ROS level in the cells increased( F=79. 055, P<0. 05) . Compared with cells treated with solanine or radiotherapy, the proliferation of osteosarcoma cells and the levels of Ki-67 and PCNA proteins were decreased after solanine combined with radiation treatment ( F=55. 165, 50. 667, 23. 389, P<0. 05) , the apoptotic rate and the levels of Bax and Cleaved Caspase-3 were increased ( F=54. 588, 42. 924, 51. 541, P<0. 05), the mitochondrial membrane potential was decreased (F=40. 762, P<0. 05), and the ROS level was increased (F=79. 055, P<0. 05). The radiosensitization ratio of solanine to osteosarcoma cells was 1. 786. Conclusions Solanine inhibits proliferation and induces apoptosis of osteosarcoma cells, and improves radiosensitivity of osteosarcoma cells.

Optical characterization of Chinese hybrid rice using laser-induced fluorescence techniques-laboratory and remote-sensing measurements: publisher's note.

This publisher's note corrects the author listing and a figure caption in Appl. Opt.57, 3481 (2018)APOPAI0003-693510.1364/AO.57.003481.

Exogenous hydrogen sulfide promotes the proliferation, invasion and cisplatin resistance of human ovarian cancer cells through EGFR/PI3K/Akt signaling pathway / 上海交通大学学报（医学版）

Objective·To investigate the effects and mechanisms of exogenous hydrogen sulfide on the proliferation, apoptosis, invasion and cisplatin resistance of human ovarian cancer cells. Methods·The human ovarian cancer cell line SKOV3 cells and human cisplatin resistant cell line SKOV3/DDP cells were studied. The effects of NaHS on cell proliferation, apoptosis and invasion in SKOV3 cells were detected respectively by CCK-8, flow cytometry and Transwell invasion assay. The effect of NaHS on cisplatin resistance in SKOV3 and SKOV3/DDP cells was detected by calculating the IC50 and IR. The phosphorylation levels of EGFR, PI3K and Akt in SKOV3 and SKOV3/DDP cells were assayed by Western blotting. After treated with erlotinib (EGFR inhibitor), LY294002 (PI3K inhibitor) and MK-2206 (Akt inhibitor), the phosphorylation levels of EGFR, PI3K and Akt in SKOV3 and SKOV3/DDP cells, as well as cell proliferation, invasion in SKOV3 cells and cisplatin resistance in SKOV3/DDP cells were detected. Results·Compared with the control group, NaHS could significantly promote the proliferation (P=0.000) and invasion (P=0.033) in SKOV3 cells; increase IC50 (P=0.027, P=0.009) and decrease IR of cisplatin (P=0.001, P=0.009) in SKOV3 and SKOV3/DDP cells. NaHS could activate EGFR (P=0.000, P=0.037), PI3K (P=0.009, P=0.013)and Akt(P=0.000,P=0.023)in SKOV3 and SKOV3/DDP cells.Erlotinib,LY294002 and MK-2206 could block the effects of NaHS on the proliferation (all P=0.000) and invasion (all P<0.01) in SKOV3 cells, and also reverse the effect of NaHS on the cisplatin resistance in SKOV3/DDP cells (all P=0.000). Conclusion·Exogenous hydrogen sulfide can induce the proliferation and invasion in SKOV3 cells, and promote the cisplatin resistance in SKOV3 and SKOV3/DDP cells, which mechanisms are related to activation of EGFR/PI3K/Akt signaling pathway.

Effect of rb-bFGF eye drops and hydroxyl indican eye drops on tear film stability and dry eye symptoms after age-related cataract surgery / 国际眼科杂志(Guoji Yanke Zazhi)

AIM:To investigate the effect of recombinant bovine basic fibroblast growth factor (rb-bFGF) eye drops and hydroxyl indican eye drops on tear film stability and dry eye symptoms after age-related cataract surgery.METHODS:Totally 80 patients with 80 affected eyes undergoing age-related cataract surgery in our hospital from January 2015 to October 2016 were selected as study subjects,and they were randomly divided into control group and experimental group with 40 patients (40 affected eyes) in each group.The two groups were treated with hydroxyl indican eye drops and rb-bFGF eye drops,respectively.The clinical curative effect,inflammation related factors [interleukin 6 (IL-6),tumor necrosis factor α (TNF-α)],Schirmer test (S Ⅰ t),break-up time (BUT) of tear film,corneal sodium fluorescein staining (FL) and scores of dry eye symptoms in the two groups were observed.RESULTS:The total treatment effective rate of experimental group after treatment was significantly higher than that of the control group (90.0％ vs 72.5％;x2 =4.021,P＜ 0.05).Before treatment,there was no significant difference in IL-6,TNF-α,S Ⅰ t,BUT,FL score and scores of dry eye symptoms between the two groups (P＞0.05).After treatment,IL-6,TNF-α,S Ⅰ t,FL score and scores of dry eye symptoms in two groups significantly decreased while BUT significantly increased (P＜ 0.05),and changes of the indexes were more significant in the experimental group than the control group (P＜0.05).CONCLUSION:In the treatment of patients after age-related cataract after surgery,rb-bFGF eye drops has more advantages over hydroxyl indican eye drops in regulating the expression of inflammatory factors,improving the tear film stability and relieving dry eye symptoms.

Plumbagin influences the proliferation and apoptosis of esophageal squamous carcinoma cell lines by down-regulation of FoxM1 expression / 药学学报

Plumbagin (Plumbago zeylanica L.) has a wide spectrum of anticancer activity with a relatively lower toxicity. The molecular mechanisms of proliferation inhibition and apoptosis induction by plumbagin on esophageal squamous carcinoma cell lines may be important for the structure modification and clinical application of plumbagin. After treatment of KYSE-30, KYSE-70 and KYSE-140 cells with 0-20 μmol·L-1 of plumbagin for 24, 48, 72 h, CCK8 was used to examine the proliferation, Annexin V and PI immunofluorescence staining for apoptosis, real-time PCR and Western blot for FoxM1 mRNA and protein expression, dual-luciferase reporter gene assay for the transcriptional activity of FoxM1, respectively. In addition, the relationship between anti- tumor effect of plumbagin and FoxM1 was investigated in vivo. Plumbagin significantly inhibited proliferation and induced apoptosis of esophageal squamous carcinoma cell in vitro and in vivo. Moreover, plumbagin down-regulated the expression of FoxM1 through suppression of its gene transcription. Our findings suggest that plumbagin may inhibit the proliferation of esophageal squamous carcinoma cell in vivo and in vitro through down-regulating the expression of FoxM1.

Therapeutic effect of all trans retinoic acid for lupus nephritis in mice / 新乡医学院学报

Objective To investigate the therapeutic effect of all-trans retinoic acid (ATRA) for lupus nephritis(LN) in mice.Methods Eighteen MRL/lpr mice were randomly divided into control group,cyclophosphamide treatment group and ATRA treatment group,with 6 rats in each group.The mice in control group were administered saline (10 mg· kg-1 · d-1) by intragastric administration for 8 weeks;the mice in ATRA treatment group were administered ATRA (10 mg · kg-1 · d-1) by intragastric administration for 8 weeks;the mice in cyclophosphamide treatment group were given cyclophosphamide (100 mg · kg-1 · d-1) by intraperitoneal injection for 2 days.Blood samples and kidney specimens were collected at the end of the experiment.The levels of blood urea nitrogen (BUN),serum creatinine (Scr) and urine creatinine (Ucr) were detected by full automatic biochemical analyzer;the changes of renal tissue structure was observed by periodic acid schiff;the expression of transforming growth factor-β1 (TGF-β1) and monocyte chemotactic protein-1 (MCP-1) was detected by immunohistochemistry.Results The levels of Scr and BUN of mice in ATRA treatment group and cyclophosphamide treatment group were significantly lower than those in the control group,and the Ucr level was significantly higher than that in the control group (P ＜ 0.01);the BUN level of mice in ATRA treatment group was significantly higher than that in the cyclophosphamide treatment group,but the Ucr level was significantly lower than that in the cyclophosphamide treatment group (P ＜ 0.01);there was no statistic difference in the Scr level of mice between the ATRA treatment group and cyclophosphamide treatment group (P ＞ 0.05).In control group,the glomerular basement nembrane and renal tubular basement membrane of mice was thicken,the mesangial of mice was proliferated;the thicken glomerular basement membrane,renal tubular basement membrane and proliferated mesangial were also seen in ATRA treatment group and cyclophosphamide treatment group which was lighten than control group,and cyclophosphamide treatment group was lighten than ATRA treatment group.The expression of MCP-1,TGF-β1 of mice in cyclophosphamide treatment group and ATRA treatment group were significantly lower than those in the control group (P ＜ 0.05);the expression of MCP-1,TGF-β1 of mice in ATRA treatment group were significantly higher than those in cyclophosphamide treatment group(P ＜ 0.05).Conclusion Both cyclophosphamide and ATRA can reduce the levels of Scr and BUN,lighten the pathological changes of renal and decrease the expression of TGF-β1 and MCP-1 in LN mice;but the effect of cyclophosphamide is better than ATRA.

Effects of Two Placement Ways for Storage of Blood Bag on Biochemical Indexes of Leukodepleted Red Blood Cells / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the effects of 2 different ways of storage bag placement on some biochemical indexes of leukodepleted red blood cells (LD-RBC) to as to ensure the efficacy and safety of clinical blood transfusion.</p><p><b>METHODS</b>The whole blood samples of 20 donors (400 ml/donor) were selected for preparating the LP-RBC, which were divided evenly into 10 bags. The 10 bags were randomly divided into 2 groups; the bags in 1 group were placed uprightly, while the bags in another group were placed horizontally. The bags of 2 groups were stored in the same conditions. One storage bag from each group was taken randomly on day 7, 14, 21, 28, 35 respectively, and then the biochemical indexes of samples were detected and analyzed.</p><p><b>RESULTS</b>The values of K(+) and LAC on day 14, the value of LDH on day 28 in the uprightly placed group were higher than those in the horizontally placed group (P < 0.05), the value of Na(+) on day 28, and the value of Glu on day 35 in the uprightly placed group were lower than those in horizontally placed group (P < 0.05), but there was no significant difference in Cl(-) level between 2 groups (P > 0.05).</p><p><b>CONCLUSION</b>The storage bags placed by different ways during the storage show different influence on some biochemical indexes of LD-RBC in the storage period.</p>

Peptide toxin components of Amanita exitialis basidiocarps.

Eight peptide toxins were isolated and purified from basidiocarps of Amanita exitialis with high performance liquid chromatography and were subjected to ultraviolet, nuclear magnetic resonance and mass spectrometry. We identified seven peptide toxins, α-amanitin, ß-amanitin, amaninamide, phallacin, phallacidin, phallisacin and desoxoviroidin. The molecular weight (729.5 Da) of the eighth compound did not match that of any reported Amanita toxins and, although the UV absorption spectrum indicated it to be a phallotoxin, further studies are required to identify this component. This is the first report of amaninamide, phallacin, phallisacin and desoxoviroidin in this lethal mushroom species.

Study of viral infections on changes of Th1/Th2 in patients with chronic obstructive pulmonary disease / 中国综合临床

Objective To study the relationship between viral infection and chronic obstructive pulmonary disease (COPD),and the effect of viral infections on the changes of Th1/Th2 in COPD patients. Methods The se-ra from 81 patients with acute exacerbations of COPD,25 patients with stable COPD and 22 healthy subjects were tested for specific IgM of respiratary syncytial virus(RSV) ,herpes simplex virus type 1 (HSV-1), parainfluenza vi-rus (PIV), adenovirus (ADV) and cytomegalovirus (CMV) by indirect enzyme-linked immunosorbent assay (ELISA). Supernatant INF-γ and IL-4 cultured with PHA were determined. Results The positive rates of IgM in patients with acute exacerbations of COPD compared with those in patients with stable COPD and healthy subjects were significantly different(P <0.001 ). The level of INF-γ, and IL-4 in patients with acute exacerbations of COPD and stable COPD compared with normal control group;the level of INF-γ (242±43) and the of IL-4(42±9) in pa-tients with acute exacerbations of COPD was not significantly different as compared with the level of INF-γ( 198±32) and the level of IL-4(56±11 ) in patients with stable COPD (P<0.05), but the level of INF-γ was increased (90±18)and IL-4 was decreased (141±24) in control group (P<0.05). Compared with those in IgM negative group, the levels of INF-γ were significantly higher and the levels of IL-4 were significantly lowerIL-4 in lgM positive group( P<0.01 ). Conclusion Virus infection is a rather important factor in acute exacerbations of COPD, and COPD is characterized by a predominance of Th1-type response,and there is more significant Th1 response predomi-nance in COPD with virus infection.

Investigation of serum thyroxine in obstructive sleep apnea-hypopnea syndrome patients / 中国综合临床

Objective To investigate the changes of serum thyroxine level in obstructive sleep apnea-hy-popnea syndrome(OSAHS) patients and to assess the role of serum thyroxine in the development of OSAHS. Meth-ods Polysomnography was used to examine the patients with OSAHS and fasting plasma serum thyroxine level were higher in obese OSAHS patients than in obese controls[ (43.56±3.48)cm vs (38.33±3.08)cm,t =4. 258,P < 0.05 ], in non-obese OSAHS patients than in non-obese control group [ (40.50±1.05 )cm vs (36.17±3.13 )cm, t = 3. 146 ,P < 0.05 ] . The levels of FT3 was (6.35±3.15 ) pmol/L in obese OSAHS patients and ( 4.08±2.37 ) pmol/L in control subjects ( t = 2.203 ,P < 0.05 ). That was ( 3.42±0.57 ) pmol/L in non-obese OSAHS patients related with AHI and microarousal index (r = 0. 500, P < 0.05;r = 0.561, P < 0.05 ), and FT4 was also positively with neck circumference( t = 0.489, P < 0.05 ), TSH level was negatively correlated with neck circumference ( t = - 0.500, P < 0.05 ) and was positively correlated with the percentage of body fat ( r = 0.498, P < 0.05 ). Conclu-sions The FT3 levels are significantly higher in the OSAHS patients than that in control subjects, though all FT3 lev-els are normal, suggesting that there are possibility to have abnormal metabolism. At the same time, FT3 level is posi-tively correlated with neck circumference ,suggesting that the OSAHS patients' higher neck circumference is correla-ted with thyroxine.

Endosomatic transference of transplanted bone marrow mesenchymal stem cells in rat of ulcerative colitis / 重庆医科大学学报

Objective:To investigate the transference of transplanted bone marrow mesenchymal stem cells (BMSCs)in rat of ulcerative colitis. Methods:SD rats were randomly distributed into group A colitis induced by immune-combined TNBS/ethanol and group B as control. All rats received caudal vein injection with 1 ml of fluorescence marked BMSCs,then 5 rats were sacrificed at day 3,7 and 14 respectively in each group. Cryostat sections of bone marrow,lung,liver,spleen and gut were made to observe the distribution of BMSCs in these organs,and the fluorimetric integral optical density(IOD)were analyzed. Results:BMSCs were mainly distributed in organs which richs vessels. The highest IOD level of BMSCs in lung was on the 7th day,and was on the 14th day in bone marrow. On the 14th day,the IOD level of BMSCs in colon of group A were higher than those of other segments of digestive tube and also higher than those in group B (P

Differentiation of fetal-bone mesenchymal stem cells induced by three kinds of connective tissue in vitro / 基础医学与临床

Objective To compare the inducing effect of three kinds of connective tissue from amnion,fetal mesentery and intestinal submucosa on the differentiation of fetal BMSCs in vitro.Methods The epithelium on three kinds of connective tissue were sampled and EGF and IGF-1 in these tissue clumpes were detected.DAPI-P3-BMSCs were planted on the surface of three kinds of connective tissue to culture.There were connective tissue induced groups,connective tissue and EGF and IGF-1 induced groups,EGF and IGF-1 induced as control group.The tissue clump was collected at 8 d、10 d、12 d,to compare their inducing effect on the differentiation of BMSCs.Results All of BMSCs induced by three kinds of connective tissue and growth factors expressed CK or EMA.The effect of unite-induced groups was stronger than those groups induced by only connective tissue,P

Effect of survivin on the apoptosis of non-small lung cancer induced by celecoxib / 基础医学与临床

Objective To investigate the inhibitory effect of celecoxib on non-small cell lung cancer in vitro and the role of survivin.Methods The inhibitory effect of celecoxib was detected by MTT.Flow cytometry and electron microscope were used for evaluation of apoptosis.The expression of survivin was detected by RT-PCR and Western blot.Results ①Celecoxib inhibited cell survives in a time-dependent and concentration-depended manner,and the effect of celecoxib was more significant in NCI-H520 than in A549.②Celecoxib caused apoptosis in concentration-depended manner.3.Celecoxib decreased the expression of survivin.Conclusion The decrease of the expression of survivin may play a critical role in the apoptosis of NSLLC in vitro induced by celecoxib.

The inhibitory effect of celebrex on non-small cell lung cancer / 解放军医学杂志

Objective To investigate the inhibitory effect of celebrex on non-small cell lung cancer and its mechanisms.Methods the inhibitory effect of celebrex on NSCLC were detected by MTT Flow cytometry, electron microscope were used for evaluation of apoptosis and cell cycle block. The expression of P27 KIP1, XIAP were detected by reverse transcription-polymerase chain reaction.Results 1. celebrex inhibited cell survival of NSCLC in a time-dependent and concentration-depended manner, and the effect of celebrex were more pronounced in NCI-H520 than in A549.2.Flow cytometry show that celebrex induced a G0/G1 cell arrest in NSCLC. 3. The result of these apoptosis test' indicate that celebrex caused apoptosis in concentration-depended manner. 4.celebrex increased the expression of P27 KIP1,and decreased the expression of XIAP.Conclusions celebrex inhibited cell survival of NSCLC.Its mechanisms involved in cell cycle arrest and apoptosis.

Comparison of two experimental ulcerative colitis models in rat / 重庆医科大学学报

Objective:To compare the rat models of ulcerative colitis induced by 2,4,6-trinitro-benzene-sulfonic acid(TNBS) and immune-comb method.Methods:SD rats were randomly distributed into groupⅠ(immune-comb method),groupⅡ(TNBS/ethanol),groupⅢ(50% ethanol) and groupⅣ(control).The rats in groupⅠwere sensitized 2 times by antigen made of rabbit colon mucosa in 2-week intervals.After abrosia for 24 hours,each rat in four groups received enema of 0.65 ml different fluids,which were:TNBS 100mg/kg +50%ethanol for groupⅠand Ⅱ,50%ethanol for group Ⅲ,and normal sodium for control group.Rats were sacrificed on day 1,21 and week 8,12 after enema to observe the macroscopical focus of infection in bowels and the microscopical changes.Results:The typical erosion and ulcer changes appeared in groupⅠandⅡ,and there was accompanying pathological changes in the end piece of ileum in groupⅠ.The pathological changes for groupⅠcould keep for 8 weeks,while those for group Ⅱtrended to heal 3 weeks later.The pathological changes in groupⅢonly were hyperemia,oedema and a few anabrosis or superficial ulcer,keeped for 21days.There was no tissue damage in group Ⅳ.Conclusion:Immune-comb method is comparatively the ideal method to establish the model,,because it has a good reproducibility,a long persistence time,and the pathological changes resemble more to those of man..