ABSTRACT
Triple-negative breast cancer is considered to be the most aggressive subtype of breast cancer. Due to its lack of expression of estrogen receptor (ER) , progesterone receptor (PR) and HER-2, there is still a lack of clear prognostic judgments and biomarkers that guide treatment. With the development of tumor immunology, the relationship between tumor immune microenvironment and tumor occurrence and development has gradually gained attention. More and more evidence suggests that the higher the level of tumor-infiltrating lymphocytes (TIL) infiltration in triple-negative breast cancer lesions, the better the prognosis of patients. However, TIL is not a single type of cell, and its different lymphocyte subpopulations have different prognostic effects in patients with triple-negative breast cancer. This article summarizes the relationship between different immune cell subgroups in the tumor immune microenvironment and the prognosis of TNBC patients.
ABSTRACT
Surfactin has great potential applications in enhancing oil recovery, agriculture, pharmaceuticals, foods and beverages, and cosmetics due to its extraordinary surface activity, biodegradability, anti-bacterial activity and biocompatibility. Enhancing surfactin production by engineering surfactin-producer and optimizing culture conditions is the key of its industrial production and subsequent applications. In this study, the effect of fatty acid synthesis pathway on surfactin synthesis was investigated, and Bacillus subtilis THBS-2 and THBS-8 with high surfactin titer were constructed by overexpressing key genes involved in the fatty acid synthesis pathway. To optimize culture condition, the amount and adding time of isopropyl-beta-D-thiogalactopyranoside (IPTG) and amino acids were studied, and a two-stage culture method was obtained: IPTG (final concentration: 1.25 mmol/L) and leucine (final concentration: 5 g/L) were added at 3 h, leucine (final concentration 5 g/L) and condensed culture medium (5 mL) were added at 24 h. Applying this strategy, the surfactin titer of B. subtilis THBS-2 reached to 24 g/L in shake flask at 48 h and up to 34 g/L after 68 h fermentation in a 30-L fermentor. The results provide basis for large-scale production and broad application of surfactin.
Subject(s)
Amino Acids , Bacillus subtilis/metabolism , Culture Media , Fermentation , Lipopeptides , Peptides, CyclicABSTRACT
OBJECTIVE:To investigate the effects of aerosol inhalation of budesonide combined with Compound ipratropium bromide on therapeutic efficacy and safety of patients with pneumoconiosis during perioperative period of massive whole-lung la-vage (WLL). METHODS:One hundred and fifty male patients with pneumoconiosis receiving WLL under general anesthesia se-lected from our hospital during Dec. 2014-May 2016 were divided into treatment group and control group in accordance with ran-dom number table,with 75 cases in each group. Both groups received WLL under general anesthesia as well as pure-oxygen manu-al positive pressure ventilation alternating with negative pressure drainage keeping interval and respiratory rate of ventilator synchro-nization. Treatment group was given Budesonide suspension 2 mL,bid+ Compound ipratropium bromide solution 2.5 mL,tid,by aerosol inhalation from 3 d before surgery to 3 d after surgery. The levels of arterial blood gas indexes(pH,PaO2,PaCO2,BE)at different lavage stages,lung function indexes (FVC,MVV,FEV1/FVC),blood gas indexes and clinical symptom score 3 d be-fore surgery and 7 d after surgery were observed in 2 groups,and the occurrence of ADR was recorded. RESULTS:After two-lung ventilation for 20 min following unilateral/bilateral lung lavage,PaO2 of 2 groups were all increased significantly compared to be-fore surgery,with statistical significance (P0.05). three days after surgery,FVC,MVV,FEV1/FVC and PaO2 of 2 groups were all increased significantly,PaCO2 and clinical symptom score were all decreased significantly. FVC,FEV1/FVC,PaO2 and clinical symptom score of treatment group were significantly bet-ter than those of control group,with statistical significance(P<0.05). The incidence of airway spasm,hypoxemia and airway pres-sure increasing in treatment group were significantly lower than in control group,with statistical significance(P<0.05). CONCLU-SIONS:During perioperative period of WLL,the aerosol inhalation of budesonide combined with Compound ipratropium bromide for patients with pneumoconiosis can improve clinical efficacy of WLL and reduce the occurrence of ADR during surgery.