ObjectiveTo investigate role and mechanism of protein tyrosine phosphatase 1B (PTP1B) in jejunoileal bypass to treating rats with type 2 diabetes mellitus (T2DM). MethodsTwenty-four T2DM SD rats and 24 normal SD rats were selected randomly by using random number table, then the SD rats with T2DM were randomly divided into jejunoileal bypass operation (DJBO, n=12) group and sham operation (DSO, n=12) group, the SD rats with normal food diet were randomly divided into jejunoileal bypass operation (NJBO, n=12) group and sham operation (NSO, n=12) group. Subsequently, fasting body weight (FBW), fasting plasma glucose (FPG), fasting insulin (FINS), and homeostasis model-insulin resistant (HOMA-IR) index of rats in each group were tested at different time points (before operation, on week 4 and 8 after operation). In addition, expression of PTP1B protein in skeletal muscle was determined by immunohistochemical staining and Western blot method respectively. Results① The FBW before making T2DM model had no significant difference between the rats with high-fat diet and with normal diet (P > 0.05), which on week 4 or 8 after making T2DM model in the rats with high-fat diet was significantly heavier than that in the rats with normal diet (P < 0.05). ② Before jejunoileal bypass operation, the FBW, FPG, FINS, and HOMA-IR index in the DJBO group and the DSO group were significantly higher than those in the NJBO group and the NSO group (P < 0.05), respectively, which had no significant differences between the DJBO group and the DSO group (P > 0.05) and between the NJBO group and the NSO group (P > 0.05). ③ Compared with the values before jejunoileal bypass operation, the FBW, FPG, FINS, and HOMA-IR index on week 4 or 8 after jejunoileal bypass operation were significantly decreased in the DJBO group (P < 0.05); the FBW was significantly increased on week 4 or 8 after jejunoileal bypass operation in the DSO group and the NSO group (P < 0.05), and on week 8 after jejunoileal bypass operation in the NJBO group (P < 0.05). The other indexes had no significant differences between before and after jejunoileal bypass operation in the DSO group, the NSO group, or the NJBO group (P > 0.05). ④ On week 8 after jejunoileal bypass operation, the expression of PTP1B protein in the DSO group was significantly higher than that in the DJBO group, the NSO group or the NJBO group (P < 0.05), which in the DJBO group was significantly higher than that in the NSO group (P < 0.05) or the NJBO group (P < 0.05), which had no significant difference between the NJBO group and the NSO group (P > 0.05). ConclusionJejunoileal bypass could effectively improve insulin resistance and decrease FPG level and FBW of T2DM rats through inhibiting expression of PTP1B protein in skeletal muscle of rat with T2DM.
ObjectiveTo investigate the clinical application value of immediate breast reconstruction using silicon implant after skin-sparing modified radical mastectomy for patients with breast cancer. MethodsA total of 28 patients with breast cancer undergoing immediate breast reconstruction using silicon implant after skin-sparing modified radical mastectomy from January 2006 to December 2009 were included in this study. The perioperative results, breast appearance evaluation and followup results were analyzed. ResultsAll 28 patients received axillary lymph node dissection and the number of lymph node dissected was 14-32 (median 21). The operation time was 117-140 min (mean 126 min), blood loss was 82-124 ml (mean 98 ml), and the time to drainage tube removal was 3-5 d. No wound infection, skin necrosis, and foreign body reaction occurred in all the patients, especially in 22 patients underwent nippleareola complex-sparing mastectomy, no ischemia or necrosis occurred in nippleareola complex. For evaluation of breast appearance, excellent was in ten cases and good in 18 cases, thus, the excellent and good rate was 100%. All patients were followed up for 12-48 months (median 24 months) after operation, and distant metastasis, local recurrence, upper extremity edema, and dysfunction were not found. No fiber kystis contracture was found and all patients were satisfied with breast appearance and good handfeels. ConclusionsImmediate breast reconstruction using silicon implant after skinsparing modified radical mastectomy has the advantage of minimal invasion, safety, simple operation, and quick postoperative recovery for patients with breast cancer and the appearance of reconstructed breast is excellent, which can be clinically used widely.
目的 评价术前立体超选择性动脉灌注化疗在ⅡB～ⅢA期乳腺癌保留乳房手术中的价值。方法 36例乳腺癌患者，其中ⅡB期10例、ⅢA期26，术前采用立体超选择性动脉灌注丝裂霉素、表阿霉素和5-氟尿嘧啶，化疗后再进行手术。结果 36例患者灌注化疗后病灶缓解32例，好转3例，无明显变化1例; 缓解率达88.9%（32/36），该32例患者肿瘤直径均缩小到2 cm以下，获得保乳手术机会。结论 术前立体超选择性动脉灌注化疗可使局部晚期乳腺癌降期获得保乳机会。