ObjectiveTo summarize functions and mechanisms of poly ADP-ribose polymerase (PARP) inhibitors and its application in germline BRCA mutated breast cancer.MethodThe literatures about the PARP inhibitors and their applications in the treatment of germline BRCA mutated breast cancer at home and abroad in recent years were collected to make a review.ResultsAs a DNA repair enzyme, the PARP played an important role in the DNA repair pathway. Based on this mechanism, the PARP inhibitors had been developed and widely used in the clinic. On the other hand, the previous studies had shown that the PARP inhibitors marked the synthetic lethal effect in the cancers with homologous recombination deficiency mechanism. By inhibiting the PARP activity in the tumor cells with BRCA mutation, all the DNA damage repair pathways were blocked, which could induce the cell apoptosis or increase the sensitivity of tumor cells to chemoradiotherapy, resulting in the cell death.ConclusionIn patients with germline BRCA mutated breast cancer, PARP inhibitors can selectively kill breast cancer cells and show a high potential for individualized treatment.
Objective To explore the preventive effectiveness of early physiotherapy on arm lymphedema after modified radical mastectomy for breast cancer. Methods A total of 206 patients who underwent modified radical mastectomy for breast cancer in The First Affiliated Hospital of Henan University from June 2014 to June 2016, enrolled in this randomized controlled clinical trial. Then these patients were randomly divided into intervention group and control group equally. Patients in the control group received routine treatment, and the patients in the intervention group began to use the air pressure pump combined with the microwave physiotherapy on the second day after the radical surgery. The incidences of limb lymphedema in 6 months and 1 year after operation between the 2 groups were compared, and the influencing factors of arm lymphedema were explored. Results The clinical data of 195 patients were analyzed at end, including 99 patients of the intervention group and 96 patients of the control group. ① There were statistical significance in the incidences of arm lymphedema in 6 months and 1 year after operation between the 2 groups (P<0.05), that incidences of arm lymphedema in the intervention group were both lower than those of the control group at the2 time points [6 months after operation: 2.0% (2/99)vs. 9.4% (9/96); 1 year after operation: 5.1% (5/99) vs. 17.7% (17/96)]. ② The results of non-conditional logistic regression analysis shown that, age (OR=1.45, P=0.008), tumor location (OR=1.72, P<0.001), TNM stage (OR=2.01, P=0.033), the number of invasive axillary lymph nodes (OR=1.15, P=0.005), and postoperative radiotherapy (OR=1.23, P=0.016) were the influencing factors of arm lymphedema after modified radical mastectomy for breast cancer, patients with age older than 60 years, tumor position at the outside area, stage Ⅲ of TNM, the number of invasive axillary lymph nodes >5, and patients received radiotherapy after operation had high risk of arm lymphedema. Conclusion Early physiotherapy can effectively prevent the occurrence of arm lymphedema after modified radical mastectomy for breast cancer, and early physiotherapy should be performed for patients with high risk of arm lymphedema.
Objective To study the relationship between metalloproteinases (MMPs) and breast cancer. Methods The literature in recent years on the relationship between the expression of MMPs and breast cancer was reviewed. Results The balance between MMPs and tissue inhibitors of metalloproteinases (TIMPs) is keeping normally kept in human body. Many of the studies showed that the expression of MMPs is increased in breast cancer. Conclusion The growth, invasion and metastasis of breast cancer is closely related with the increased expression of MMPs. This suggests that MMPs is a valuable prognostic marker and TIMPs would be a novel drug against cancer.
Objective To investigate the relationship between skin/pectoral muscle invasion and the prognosis of male breast cancer. Methods Clinical data and follow-up information of 79 male breast cancer patients who received treatment between September 2008 to April 2020 in West China Hospital were retrospectively reviewed, to analyze the clinicopathological features of male breast cancer and prognostic value of skin/pectoral muscle invasion. Results Among 79 male breast cancer patients, a total of 23 patients (29.1%) were with skin/pectoral muscle invasion at diagnosis. All the patients were followed up, with a median follow-up period of 63.3 months (1.0–204.5 months). Within follow-up period, 8 patients (10.1%) suffered from relapse, 19 patients (24.7%, 19/77) suffered from metastasis, and 4 patients (5.1%) died. Multivariate Cox proportional risk regression model suggested that patients with skin/pectoral muscle invaded had poor disease free survival [RR=4.48, 95%CI (1.08, 18.52), P=0.038]. Conclusions Skinor pectoral muscle invasion might be a valuable prognostic factor for male breast cancer patients. However, limited by sample size, the conclusion should be proved by further high-level studies.
【摘要】 目的 探討老年性乳腺癌術前內分泌治療效果及降期后手術優點。 方法 2004年5月－2010年12月19例老年性局部晚期乳腺癌患者，術前給予口服芳香化酶抑制劑（aromatase inhibitors，AI）2～10個月，進行療效觀察，降期后手術及術后同一有效內分泌藥物繼續治療并隨訪，時間1～66個月。 結果 自AI治療開始至手術時，臨床完全緩解2例，部分緩解11例，穩定3例，進展3例；手術14例，另5例由于全身狀況差、基礎疾病嚴重不能耐受手術或局部進展而放棄手術，5年總生存率68%，無瘤生存率47%。 結論 術前內分泌治療療效可靠，不良反應輕，特別適應老年伴有內科疾病不適應化學療法的患者，可以增加保乳手術率和手術切除率。【Abstract】 Objective To investigate the clinical value of neo-adjuvant endocrine therapy for locally advanced breast cancer in elderly patients and the advantages of operation after down-staging of breast cancer. Methods From May 2004 to December 2010, 19 patients with locally advanced breast cancer were treated with Aromatase inhibitor (AI) neo-adjuvant endocrine therapy for 2 to 10 months before operation. The clinical efficacy was observed. Operation was performed after down-staging of the cancer. After the operation, patients continued taking the same effective drug and were followed-up for 1 to 66 months. Results From AI treatment to the time of operation, there were 2 cases of clinical complete response, 11 cases of clinical partial response, 3 cases of stable disease, and 3 cases of progressive disease. A total of 14 patients were operated, and 5 other patients could not have the operation for bad body conditions, serious basic-diseases or local progress of the disease. The 5-year overall survival rate was 68%, and the disease-free survival rate was 47%. Conclusion Neo-adjuvant endocrine therapy has a reliable clinical effect and low side-effects. It is especially suitable for elderly patients excluded from chemotherapy because of internal medical diseases. It can also increase the rate of breast-conserving and surgical excision.
Objective To understand pathogenesis, clinical manifestations, diagnosis, treatment, and prognosis of metaplastic breast cancer (MBC), and to provide some new ideas for clinical diagnosis and treatment, and exploration of scientific research for it. Method The relevant literatures of the latest research on MBC were reviewed and analyzed. Results At present, the pathogenesis of the MBC was still uncertain. The incidence of the MBC was lower, and it’s clinical manifestations were not specific. Compared with the invasive breast cancer, the tumor diameter was larger, the growth was faster, the differentiation degree was lower, the risks of the local and distant metastases were higher, while the lymph node metastasis was rare. Because of the clinical manifestation, auxiliary examination, and imaging examinations were lack of specificity, the diagnosis was difficult. Although the preoperative puncture could provide a reliable diagnosis evidence, it was difficult for distinguishing and accurate diagnosis due to it’s more subtypings. Some of the specific molecular targets could provide a help for it. At present, the modified radical mastectomy was often performed, the axillary lymph node metastasis was relatively rare in the MBC, so the sentinel lymph node biopsy was more important in the treatment of the MBC. The therapeutic effect was limited by the endocrine therapy, targeted therapy, or neoadjuvant chemotherapy and was poor by the systemic chemotherapy. Although the radiotherapy and chemotherapy could improve the overall survival and prolong the disease-free survival and control the local recurrence, the difference of it’s therapeutic effect was great due to the complex MBC typing. Conclusions MBC is a highly malignant and strongly invasive tumor, and it has more subtypings. Clinical manifestation and preoperative examination are lack of specificity, hence it is easy for misdiagnosis or missed diagnosis. Unified treatment guideline is lack of, prognosis is poor. So, it needs to explore some new treatment methods and formulate standardized treatment guidelines in order to achieve a better therapeutic effect.