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Objective:To explore the characteristics of multimodal ultrasound before neoadjuvant chemotherapy (NAC) and the degree of postoperative pathological remission and B-cell lymphoma-2 (BCL-2) .Methods:From Jan. 2018 to Dec. 2020, female breast cancer patients who underwent breast-conserving or total mastectomy surgery at Shaanxi Hospital of traditional Chinese Medicine were selected as the research objects. Routine ultrasound, automatic breast full-volume imaging, and contrast-enhanced ultrasound were performed before chemotherapy. The postoperative pathological remission was evaluated according to Miller and Payne’s modified pathological response grading standard. The expression of BCL-2 in breast cancer tissue was detected by immunohistochemistry. Univariate analysis was performed on the characteristics of MHR, NMHR and bcl-2 with different expression status. Then, binary Logistic regression was used to analyze the significant variables in univariate analysis.Results:Among 186 patients, 84 patients (45.2%) were in MHR group and 102 patients (54.8%) in NMHR group after NAC surgery. The maximum diameter of mass in NMRH group was > 4 cm. The proportion of CM, irregular shape of mass, microcalcification, high enhancement of CEUS and perfusion defect (62.7%, 62.7%, 70.6%, 62.7%, 66.7%) was significantly higher than that of MRH group (38.1%, 40.5%, 39.3%, 41.7%, 31.0%, P<0.05) . The proportion of irregular shape, microcalcification, Alder blood flow grade 2-3, hyperenhancement and peripheral radiation enhancement in low bcl-2 expression patients (65.1%, 69.8%, 65.1%, 71.7%, 72.6%, respectively) was significantly higher than that in high Bcl-2 expression patients (36.2%, 38.7%, 27.5%, 28.7%, 38.8% respectively) (all P<0.05) . Multivariate Logistic analysis showed that irregular masses, with microcalcifications, and high CEUS performance were independent risk factors for NMHR (all P<0.05) ; irregular masses, with microcalcifications, and CEUS manifestations of peripheral radial enhancement were independent risk factors for low expression of BCL-2 (all P<0.05) . Conclusion:Multimodal ultrasound features can be used to predict the degree of pathological remission and the expression of BCL-2 in breast cancer patients with NAC, which helps to select treatment options and predict the prognosis of patients.
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Objective To investigate the effect of inhibiting tumor suppressor gene phosphatase and tensin homology deleted on chromosome ten (PTEN) on growth of neurons cultured in inhibitive microenvironment.Methods Primary cortical neurons were separated from fetal rats and cultured with adult rat brain-derived myelin membrane proteins as inhibitory substrate.Cells were divided into 3 groups:normal control group,inhibitory control group (myelin membrane proteins as inhibitory substrate) and bpv treatment group (200 nmol/L bpv+myelin membrane proteins).Real-time quantitative-PCR was performed to detect the expressions of PTEN and mammalian target ofrapamycin (mTOR) genes,and immunofluorescence staining was used to observe the growth ofneurites 24,48 and 72 h,and 5 d after inoculation.Results Immunofluorescence staining revealed that significant differences of the growth of neurites at the four observation time points existed among the 3 groups (P＜0.05); during the early days of culture (24,48 and 72 h),cells in normal control group had the longest neurite (43.5±12.2,94.9±23.6 and 154.3±35.4 μm),those in the bpv treatment group enjoyed the second prize (28.8±10.2,75.4±22.5 and 136.8±40.8 μm) and those in the inhibitory control group was obviously inhibited (17.4±5.8,46.3± 13.7 and 78.4 ±29.8 μm).But the difference on the 5th d of cultivation changed into bpv treatment group＞normal control group＞inhibitory control group with the neurite length of (225.9±50.6),(218.4±58.1) and (173.6±48.7) μm,respectively (P＜0.05).PCR revealed no significant difference in expressions of PTEN and mTOR genes of the three groups between each two time points (P＞0.05); while at the same time point,significantly increased expressions ofmTOR and PTEN in the bpv treatment group were noted as compared with those in the normal control group and inhibitory control group (P＜0.05).Conclusions Growth of neurons in inhibitive microenvironment is improved on condition that the tumor suppressor gene PTEN is inhibited,which is probably related to the activation of PI3K/AKT/MTOR pathway.