Objective To evaluate the clinical effects of endovascular angioplasty and stenting for the treatment of TASC B,C arteriosclerotic occlusion(ASO) of lower extremity.Methods After the identification of the occlusion by angiography via femoral artery access by Seldinger method,the occluded arteries (mean length 7.5cm; range 1~20 cm) in 40 patients(47limbs) were treated by percutaneous transluminal angioplasty and stent placement. Results The primary recanalization was successful in 45 of 47 limbs. The technical successful rate was 96%. Thirty one self-expanding stents were deployed. PTA without stent placememt was performed in 16 limbs(of them,11 were blow knee).The ankle brachial pressure index (ABI) increased from (0.36?0.14) preoperatively to (0.82?0.15) on the 7th postoperative day. All patients were follow-uped for 1 to 48 months. Stents were occluded in 4 patients. Restenosis was observed in 1 limbs. All of the rest remained patent in the follow-up period.Conclusion Endovascular angioplasty and stenting can be an effective method for the treatment of long segmental (including below-knee) arteriosclerotic occlusion of lower extremities.

Three dimensional electrical impedance tomography (3D-EIT) became an important branch of EIT recently. It is important to research imaging and image quality evaluation methods for single targets of different positions and multi-targets in 3D field. Using finite element subdivision method, 3D-EIT field was dispersed into cube unit in the present study for models with single target located in the center of field, middle of field, and near to the edge, respectively. For models with two targets and four targets near to the field edge, Tikhonov-Noser algorithm was adopted in image reconstruction. Imaging error function ER and structure similarity degree function SSIM were introduced to evaluate the reconstructed images. For the models with signal target, with the movement of the target from the center to the edge of the field, the value of ER increased and SSIM decreased, and reconstruction quality decreased. For the models with multi-targets near to the field edge, ER and SSIM increased and decreased respectively with the increase of target number, mage quality also decreased. Tikhonov-Noser algorithm is an effective 3D-EIT algorithm. ER and SSIM are adaptive for the characteristic of 3D-EIT images, and it can quantitatively evaluate the 3D-EIT imaging effect from the two perspective of imaging error and structure quality.
Algorithms ; Electric Impedance ; Image Processing, Computer-Assisted ; Imaging, Three-Dimensional ; Tomography

Objective To explore the effect of stromal cell-derived factor-1 ( SDF-1 ) in combination with transplantation of peripheral blood endothelial progenitor cells (EPCs) for the treatment of nude mice hindlimb ischemia. Methods Hindlimb ischemia model was established in nude mice, mice were then divided into five groups randomly: ischemic control group, peripheral blood EPCs transplantation group, SDF-1 local application group, SDF-1 combined with EPCs group, SDF-1 combined with AMD3100 treated EPCs group. Local CD34+VEGFR+ cells in the hind gastrocnemius were detected at day 3,7 after transplantation. The intensity of neovasculorization were evaluated at day 28. Results The double-positive cells number of control group, EPCs group, SDF-1 group, SDF-1 + EPCs group, SDF-1 + AMD3100 EPCs group were 0.00 ±0.00,5. 30 ±0.65,0.00 ±0.00,10. 31 ±0. 63,1. 86 ±0. 17 at day 3 and 0. 00 ±0. 00, 7.05 ±0. 18,0. 00 ±0. 00,11. 81 ±0. 53,2. 83 ±0. 48 at day 7. The number of new capillaries were 3. 00 ± 0.13,6.15 ± 0. 04,6. 20 ± 0. 10,10. 65 ± 0.08,6. 21 ±0. 08 at day 28. SDF-1 increased the CD34 + VEGFR+ cells (P ＜0. 05) and the number of new vessels (P ＜0.05). SDF-1 combined EPCs further increased the number of new vessels (P ＜ 0. 05 ). Conclusions SDF-1 enhances blood vessel formation and promotes angiogenesis by promoting EPCs homing, which could be blocked by AMD3100.

PURPOSE: Breast cancer has become a major public health threat in the current society. Anthracycline doxorubicin (DOX) is a widely used drug in breast cancer chemotherapy. We aimed to investigate the immunogenic death of breast tumor cells caused by DOX, and detect the effects of combination of DOX and a small molecule inhibitor in tumor engrafted mouse model. METHODS: We used 4T1 breast cancer cells to examine the anthracycline DOX-mediated immunogenic death of breast tumor cells by assessing the calreticulin exposure and adenosine triphosphate and high mobility group box 1 release. Using 4T1 tumor cell-engrafted mouse model, we also detected the expression of indoleamine 2,3-dioxygenase (IDO) in tumor tissues after DOX treatment and further explored whether the specific small molecule IDO1 inhibitor NLG919 combined with DOX, can exhibit better therapeutic effects on breast cancer. RESULTS: DOX induced immunogenic cell death of murine breast cancer cells 4T1 as well as the upregulation of IDO1. We also found that treatment with NLG919 enhanced kynurenine inhibition in a dose-dependent manner. IDO1 inhibition reversed CD8+ T cell suppression mediated by IDO-expressing 4T1 murine breast cancer cells. Compared to the single agent or control, combination of DOX and NLG919 significantly inhibited the tumor growth, indicating that the 2 drugs exhibit synergistic effect. The combination therapy also increased the expression of transforming growth factor-β, while lowering the expressions of interleukin-12p70 and interferon-γ. CONCLUSION: Compared to single agent therapy, combination of NLG919 with DOX demonstrated better therapeutic effects in 4T1 murine breast tumor model. IDO inhibition by NLG919 enhanced the therapeutic efficacy of DOX in breast cancer, achieving synergistic effect.
Adenosine Triphosphate ; Animals ; Breast Neoplasms ; Breast ; Calreticulin ; Cell Death ; Doxorubicin ; Drug Therapy ; Indoleamine-Pyrrole 2,3,-Dioxygenase ; Kynurenine ; Mice ; Public Health ; Therapeutic Uses ; Up-Regulation

OBJECTIVE: To compare the mRNA level of cell proliferation-related genes Twist1, SIRT1, FGF2 and TGF-β3 in placenta mesenchymal stem cells (PA-MSCs), umbilical cord mensenchymals (UC-MSCs) and dental pulp mesenchymal stem cells (DP-MSCs). METHODS: The morphology of various passages of PA-MSCs, UC-MSCs and DP-MSCs were observed by microscopy. Proliferation and promoting ability of the three cell lines were detected with the MTT method. Real-time PCR (RT-PCR) was used to determine the mRNA levels of Twist1, SIRT1, FGF2, TGF-β3. RESULTS: The morphology of UC-MSCs and DP-MSCs was different from that of PA-MSCs. Proliferation ability and promoting ability of the PA-MSCs was superior to that of UC-MSCs and DP-MSCs. In PA-MSCs, expression level of Twist1 and TGF-β3 was the highest and FGF2 was the lowest. SIRT1 was highly expressed in UC-MSCs. With the cell subcultured, different expression levels of Twist1, SIRT1, FGF2, TGF-β3 was observed in PA-MSCs, UC-MSCs and DP-MSCs. CONCLUSION Up-regulated expression of the Twist1, SIRT1 and TGF-β3 genes can promote proliferation of PA-MSCs, UC-MSCs and DP-MSCs, whilst TGF-β3 may inhibit these. The regulatory effect of Twist1, SIRT1, FGF2 and TGF-β3 genes on PA-MSCs, UC-MSCs and DP-MSCs are different.
Cell Differentiation ; Cell Proliferation/genetics* ; Cells, Cultured ; Dental Pulp/cytology* ; Female ; Fibroblast Growth Factor 2/genetics* ; Humans ; Mesenchymal Stem Cells/cytology* ; Nuclear Proteins/genetics* ; Placenta/cytology* ; Pregnancy ; Sirtuin 1/genetics* ; Transforming Growth Factor beta3/genetics* ; Twist-Related Protein 1/genetics* ; Umbilical Cord/cytology*

Objective To explore the distribution and changes of the upper respiratory tract pressure in the human body under circulatory respiration conditions.Methods An oral-secondary bronchus model was established based on CT images.The pressure distribution at various parts of the model during circulatory respiration and the pressure distribution at the moment of maximum inspiration or expiration were simulated under a respiratory flow of 60 L/min.Results The pressure difference in the upper respiratory tract increased with the respiratory flow.Some positions with special structures,such as pharynx,larynx,trachea,etc.,showed pressure gradient changes,especially between edge of epiglottis to the trachea and upon the bifurcation point of tracheal.Conclusions The air flow motion,including pressure distribution and variation,is related to the anatomy morphological structure of the respiratory tract,and they interactively influence the respiration process.The flow field characteristics of pressure cyclic variation can provide basis for exploring the aerosol deposition and the occurrence and treatment of some respiratory tract diseases.

Objective:To examine the feasibility and safety of endoscopic subcutaneous mastectomy and immediate reconstruction via a small skin incision approach without gas and mesh for early breast carcinomas.Methods:We analyzed 7 patients diagnosed with breast cancer who underwent an endoscopic subcutaneous mastectomy and immediate reconstruction from Jun. to Nov. 2021 using a gasless and meshless small skin incision approach at the Department of Thyroid and Breast Surgery, the First Affiliated Hospital of USTC. Mean age was 44.9 (29-63) years. Clinical stage, postoperative complications and other data of patients were collected. Patients were required to fill in BREAST-Q scale anonymously before and during postoperative follow-up. The difference was considered significant for P < 0.05. Results:The tumors were all unilateral and solitary lesions, with a mean diameter of 1.74 (0-5) cm. The average distance of mass from the nipple on imaging was 2.11cm (range 0 to 4) . Postoperative pathological clinical stage,1 patient was in Tis, 3 patients were in stage I, 2 patients were in stage II and a pathological complete response was achieved in one patient (ypT0pN0cM0 CR) . The mean operative time was 245.3 (195-316) min, the mean intraoperative bleeding volume was 37.1ml, the mean postoperative hospital stay was 5.1 d, and the median follow-up time was 8.8 (6-11.2) months. All the 7 patients had incision healing at the first stage, and no complications such as infection, incision complications, capsular contracture, nipple-areola complex or skin flap necrosis, removal or displacement of breast implant occurred. No local recurrence or metastasis was detected during the follow-up period. Compared with preoperative, the scores of postoperative psychosocial status, chest wall status were lower ( P<0.05) , but still ideal, while breast satisfaction and sexual satisfaction scores were not significantly different from preoperative baseline ( P>0.05) . Conclusion:This study indicates that endoscope-assisted breast reconstruction with gasless and meshless is a safe and feasible surgical intervention method for early breast cancer, with good cosmetic effects, and can be promoted as a new type of breast reconstruction.