Surfactin, a negatively charged amphiphilic lipopeptide biosurfactant, is synthesized by the bacterium . It consists of a cyclic heptapeptide and an 11-15C β-hydroxy fatty acid. To probe how the modification of the molecular skeleton of surfactin influences its selectivity and activity against breast cancer, six synthetic surfactins were generated. Modifications were accomplished by conjugating amine-functionalized molecules to the Glu and Asp carboxyl moieties of the heptapeptide. The resulting synthetic surfactins provided a diverse series of molecules with differences in charge, size, and hydrophilicity. After purification and structural analysis, insights into biological activity and specificity were generated for each compound. Dose-dependent growth inhibition was determined for four tumorigenic breast cancer cell lines in monolayer and spheroid morphologies, as well as nontumorigenic fibroblasts and sheep erythrocytes, which were utilized to determine selectivity indices. Results indicated that two compounds, which have amplified anionic charge, had increased activity on breast cancer, with reduced activity on nontumorigenic fibroblasts and erythrocytes. Cationic derivative surf-ethylenediamine has increased activity on all cell lines tested. Novel correlations between dose-response activities and physicochemical properties of all compounds determined that there is a significant correlation between the critical micelle concentration and activity against multiple cell lines.
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http://dx.doi.org/10.1021/acsomega.3c00454 | DOI Listing |
BMC Pregnancy Childbirth
December 2024
Vali-e-Asr Reproductive Health Research Center, Family Health Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
Background: Early identification of gestational diabetes mellitus is essential for improving maternal and neonatal outcomes. While risk factors such as advanced maternal age, elevated pre-pregnancy body mass index, multiparity, and a history of gestational diabetes have been recognized, the role of serum biomarkers remains uncertain. This study explores the predictive value of early-pregnancy laboratory findings in conjunction with maternal demographic and clinical characteristics for gestational diabetes mellitus.
View Article and Find Full Text PDFBMC Cancer
December 2024
Department of Radiation Oncology, Cancer Center, West China Hospital, No. 37, Guoxue Alley, Chengdu, 610041, China.
Background: This study aimed to assess combined supraclavicular lymph node dissection (SLND) and radiotherapy (RT) versus standalone radiotherapy for efficacy in newly diagnosed breast cancer patients with ipsilateral supraclavicular lymph node metastasis (ISLNM).
Methods: Totally 143 ISLNM patients treated between 2014 and 2021 in two medical institutions were examined retrospectively. Patients were divided into two groups to undergo combined SLND and radiotherapy (surgery + RT, n = 73) or radiotherapy alone (RT, n = 70).
Mol Med
December 2024
Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, P.R. China.
Background: ADAM19 (ADAM Metallopeptidase Domain 19) is known to be involved in extracellular matrix (ECM) remodeling, yet its specific function in systemic sclerosis (SSc) fibrosis remains unclear.
Objectives: This study sought to clarify the role and underlying mechanism of ADAM19 in SSc skin fibrosis.
Methods: The expression of ADAM19 was assessed in skin tissues of SSc and wound healing using publicly available transcriptome datasets.
Ann Surg Oncol
December 2024
Department of Plastic and Reconstructive Surgery, The Ohio State University, Columbus, OH, USA.
Background: Prophylactic lymphovenous bypass (pLVB) is a microsurgical technique aimed to prevent breast cancer-related lymphedema (BCRL) after axillary lymph node dissection (ALND) by redirecting lymphatic flow from the ligated lymphatics into neighboring veins. This report describes the authors' 9-year institutional experience of pLVB in patients undergoing ALND to prevent BCRL.
Methods: Patients who underwent ALND were reviewed.
Discov Oncol
December 2024
Laboratory of Integrative Oncology, National Cancer Center Research Institute, Tokyo, Japan.
Nuclear receptors, a group of 48 transcription factors that regulate a multitude of processes within our body, have long been employed as diagnostic markers or therapeutic targets in breast cancer, prostate cancer, and acute promyelocytic leukemia. Unfortunately, no comprehensive investigation has been conducted on their significance in other cancer types. The current study aimed to explore novel diagnostic markers by classifying nuclear receptors according to their expression patterns based on transcriptome data from The Cancer Genome Atlas on 10,071 tumor samples across 33 cancer types and investigating their association with genetic mutations, histological types, and prognosis.
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