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find Keyword "肥大" 27 results
  • 先天性视网膜色素上皮肥大

    报告2列先天性视网膜色素上皮肥大病例。眼底改变为孤立、扁平的圆形色素斑,位于视网膜深层,其内可见斑点状低色素或无色素区。其中一例追踪观察10年,发现病变的大小、形态均有明显变化,提示本病有缓慢发展趋势。 (中华眼底病杂志,1993,9:41-42)

    Release date:2016-09-02 06:35 Export PDF Favorites Scan
  • Negative signaling molecules of human mast cells and allergic diseases

    Release date:2016-09-14 11:57 Export PDF Favorites Scan
  • 先天性视网膜色素上皮肥大

    Release date:2023-11-16 05:57 Export PDF Favorites Scan
  • Application of liposuction technique assisted superomedial pedicle with vertical incision in reduction mammaplasty

    ObjectiveTo explore the effectiveness of liposuction technique assisted superomedial pedicle with a vertical incision in reduction mammaplasty.MethodsBetween March 2014 and March 2019, 65 patients (127 sides) with breast hypertrophy had undergone breast reduction by using liposuction technique assisted superomedial pedicle with a vertical incision. The patients were 21 to 58 years old, with an average of 42.2 years. Body mass index ranged from 18.8 to 26.5 kg/m2, with an average of 21.3 kg/m2. Among them, 62 cases were bilateral operations and 3 cases were unilateral operation. The degree of mastoptosis was rated as degreeⅡ in 73 sides and degree Ⅲ in 54 sides according to the Regnault criteria.ResultsThe unilateral breast removed 432 g on average (range, 228-932 g); the distance of nipple upward was 4.5-9.5 cm (mean, 6.5 cm); the volume of unilateral liposuction was 50-380 mL (mean, 148 mL). There were 2 sides (1.58%) of unilateral intramammary hematomas after operation, 4 sides (3.15%) of bilateral breast vertical incisions slightly split, and 1 side (0.79%) of the nipple-areola epidermis necrosis. All patients were followed up 6 months to 5 years, with an average of 18 months. During the follow-up, there was no evident re-dropping of the breast and no enlargement of the areola. No patient underwent scar excision. At last follow-up, the effectiveness was evaluated by the surgeons. There were 52 cases with very satisfactory, 10 cases with satisfactory, and 3 cases with unsatisfactory for the breast shape and symmetry. There were 51 cases with very satisfactory, 11 cases with satisfactory, and 3 cases with unsatisfactory for the nipple position and areola diameter. The incision scar was obvious in 25 cases and was not obvious in 40 cases. The results of self-assessment showed very satisfactory for the breast shape in 48 cases, satisfactory in 12 cases, and unsatisfactory in 5 cases; very satisfactory for the incision scar in 40 cases, satisfactory in 17 cases, and unsatisfactory in 8 cases. Overall evaluation of the patient was very satisfactory in 52 cases, satisfactory in 7 cases, and unsatisfactory in 6 cases.ConclusionThe liposuction technique assisted superomedial pedicle with a vertical incision in reduction mammaplasty is a safe and reliable surgical method with a satisfactory result.

    Release date:2020-07-07 07:58 Export PDF Favorites Scan
  • RESEARCH PROGRESS OF PATHOLOGY OF ENDOCHONDRAL OSSIFICATION IN OSTEOARTHRITIS

    ObjectiveTo summarize the research progress of pathological manifestations and mechanism of endochondral ossification in osteoarthritis (OA). MethodsThe literature about endochondral ossification, bone-cartilage remodeling in OA, and joints development was reviewed, analyzed, and summarized. ResultsChondrocyte hypertrophy and apoptosis, vascular invasion, replication of the tidemark, thickening calcified cartilage, and thinning superficial cartilage are the characteristics of cartilage degeneration in OA. Articular cartilage and growth plate are similar in structure, and cartilage degeneration in OA is similar to a process of endochondral ossification of the growth plate. ConclusionLoss of stability characterization from resting metabolic balance to a high conversion state of temporary cartilage in stimulation of abnormal mechanical stresses and cytokines would subsequently contributed to continual calcification and remodeling of articular cartilage, which may be the key link of the initiation and development of OA.

    Release date:2016-12-12 09:20 Export PDF Favorites Scan
  • 肥大细胞对肠易激综合征影响的研究进展

    肠易激综合征(irritable bowel syndrome,IBS)是一种常见的功能性肠道疾病。其患病率呈逐年上升趋势,具有病程长,难治愈,易复发等特征,严重影响患者的生活质量。IBS发病机制尚不明确,目前尚无最佳治疗方案,因此,明确 IBS 的病因和发病机制是治疗 IBS 的首要任务。目前学术界研究表明,肥大细胞显著影响 IBS 的发生发展,其释放的活性物质在 IBS 病理生理变化过程中发挥关键性作用。该文对肥大细胞在 IBS 发生发展中的作用研究进展作一综述,为明确 IBS 发病机制,探索新的治疗靶点及开发新型治疗药物提供有价值的参考依据和新思路。

    Release date:2017-09-22 03:44 Export PDF Favorites Scan
  • CLINICAL APPLICATION OF THREE-DIMENSIONAL RECONSTRUCTION OF CT IMAGES IN TREATING MANDIBULAR ANGLE HYPERTROPHY

    Objective To investigate the cl inical directive significance of three-dimensional reconstruction of CT in treating mandibular angle hypertrophy. Methods Between March 2009 and January 2011, 18 patients with mandibular angle hypertrophy were treated using the three-dimensional reconstruction technology of CT. All patients were female, aged20-36 years with an average of 25 years. Eighteen patients included: 14 single mandibular angle hypertrophy, 3 mandibular angle hypertrophy with masseter hypertrophy, and 1 mandibular angle hypertrophy with bilateral asymmetry; 6 cases of ptosis of mandibular angle, 9 cases of prominent mandibular angle, and 3 cases of introversive mandibular angle. According to the types of mandibular angle hypertrophy, the surgical methods could be correctly chosen. The procedure was planned and simulated; the osteotomy l ine was marked and the osteotomy was measured on the workstations of three-dimensional reconstruction. Results No fracture of mandible occurred in the operation. Facial nerve temporary attack occurred in 1 case and recovered at 3 months after operation. All patients were followed up 6-12 months (mean, 7.6 months). After 6 months of operation, the effectiveness was satisfactory in 15 cases, basically satisfactory in 2 cases, and unsatisfactory in 1 case (bilateral asymmetry). Conclusion Based on three-dimensional reconstruction technology of CT, surgical design performed on the model will promote the accuracy of operation. Basically symmetrical appearances can be achieved with satisfactory results.

    Release date:2016-08-31 05:42 Export PDF Favorites Scan
  • Preliminary Investigation into the Mechanism of Cardiomyocyte Hypertrophy Induced by Visfatin

    The aim of the current study is to investigate the effect of visfatin on cardiomyocyte hypertrophy. Cultured H9c2 cardiomyocytes were exposed to visfatin at different concentrations for different periods of time, and the markers of cardiomyocyte hypertrophy were detected. Moreover, pravastatin, the inhibitor of endoplasmic reticulum stress (ERS) or thapsigargin, an ERS agonist was used respectively to pre-treat the cells before visfatin stimulation. F-actin staining was performed to measure the cell surface change. The mRNA expressions of atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP)and ERS markers including glucose-regulated protein 78(GRP78), C/EPB homologous protein (CHOP) and activating transcription factor 6 (ATF6) were assessed by real time RT-PCR. The change of protein level of GRP78 and CHOP was detected by Western blot. The experimental data demonstrated that exposure to 100 or 150 ng/mL concentrations of visfatin for 24 h, or 100 ng/mL of visfatin for 24 or 48 h, significantly increased the expression of markers for cardiomyocyte hypertrophy. Visfatin stimulation provoked ERS in H9c2 cells. Furthermore, pre-treatment with pravastatin partially inhibited the visfatin-induced mRNA expression of ANP and BNP in H9c2 cells, whereas thapsigargin promoted the visfatin-induced expression of cardiomyocyte hypertrophy markers. The results suggest that visfatin might induce cardiomyocyte hypertrophy via ERS -dependent pathways.

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  • 心肌梗死后残存心肌细胞肥大性改变及其IGF1、IGF1R的表达

    目的 观察心肌梗死后残存心肌细胞肥大性改变及其胰岛素样生长因子-1(IGF-1)、胰岛素样生长因子-1受体(IGF-1R)的表达,探讨梗死心肌心肌细胞肥大的机制。 方法 取急性心肌梗死后2周、4周、8周的梗死心肌,制备单心肌细胞悬液,采用激光共聚焦扫描显微镜(Confocal)检测心肌细胞体积,采用免疫组织化学法检测心肌细胞IGF-1、IGF-1R的表达。 结果 〖HTSS〗急性心肌梗死8周梗死区域心肌细胞体积较正常区域心肌细胞增大(37 563.93±6 176.79 μm3 vs. 28 638.61±6 890.89 μm3, t=4.840,P=0.020),细胞肥大以宽度和厚度为主;梗死区域心肌细胞可见IGF1染色阳性颗粒,IGF-1表达高于正常区域心肌细胞(79.58±4.57 vs. 64.12±3.91,t=27.564,P=0.002);IGF-1R主要分布于心肌细胞膜,梗死区域心肌细胞IGF1R表达高于正常区域心肌细胞(67.02±2.56 vs. 66.73±3.49,t=3.845,P=0.042),其中以急性心肌梗死4周IGF-1R表达最高。 结论 心肌梗死后残存心肌细胞分泌IGF-1和IGF-1R,并可能在促使残存心肌细胞肥大中起了积极作用。

    Release date:2016-08-30 05:59 Export PDF Favorites Scan
  • 先天性视网膜色素上皮肥大一例

    Release date:2016-09-02 05:58 Export PDF Favorites Scan
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