Influence of Fibroblasts on Mammary Gland Development, Breast Cancer Microenvironment Remodeling, and Cancer Cell Dissemination

The authors review the latest literature describing the structure of the mammary gland and the breast cancer microenvironment (BCM) and summarize the influence of epithelial-mesenchymal transition and autophagy in breast cancer dissemination.
[Cancers]
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Oncolytics Biotech® Announces Investigator Sponsored Phase II Trial Evaluating Pelareorep-anti-PD-1 Combination Treatment in Triple-Negative Breast Cancer

Oncolytics Biotech® Inc announced a new investigator-sponsored triple-negative breast cancer study to be managed by Rutgers Cancer Institute of New Jersey. The phase II trial, known as IRENE, will investigate the use of pelareorep in combination with Incyte’s anti-PD-1 checkpoint inhibitor retifanlimab in patients with unresectable locally advanced or metastatic TNBC.
[Oncolytics Biotech]
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A Novel Mitochondrial Targeted Hybrid Peptide Modified HPMA Copolymers for Breast Cancer Metastasis Suppression

Researchers designed a mitochondrial targeted drug delivery system based on N-(2-hydroxypropyl) methacrylamide copolymers to simultaneously inhibit breast cancer progression and metastasis.
[Journal of Controlled Release]
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A Novel 4-Aminoquinazoline Derivative, DHW-208, Suppresses the Growth of Human Breast Cancer Cells by Targeting the PI3K/AKT/mTOR Pathway

Researchers report for the first time that DHW-208 suppressed the growth of human breast cancer cells by inhibiting the PI3K/AKT/mTOR-signaling pathway both in vivo and in vitro.
[Cell Death & Disease]
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Breast Cancer Colonization by Fusobacterium nucleatum Accelerates Tumor Growth and Metastatic Progression

Investigators showed that Gal-GalNAc levels increased as human breast cancer progressed, and that occurrence of F. nucleatum gDNA in breast cancer samples correlated with high Gal-GalNAc levels.
[Nature Communications]
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PRKCQ Inhibition Enhances Chemosensitivity of Triple-negative Breast Cancer by Regulating Bim

Scientists showed that Protein kinase C theta regulated the sensitivity of TNBC cells to apoptosis triggered by standard-of-care chemotherapy by regulating levels of pro-apoptotic Bim.
[Breast Cancer Research]
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NIH’s New Sexual-Harassment Rules Are Still Too Weak, Say Critics

On 24 June, the US National Institutes of Health (NIH) described the actions it will take when alerted to reports of unsafe behavior, including restricting scientists from peer-review panels, holding back pending grants and refusing university requests to transfer funding to other institutions in cases where a harasser changes jobs.
[Nature News]
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Manumycin Polyketides Act as Molecular Glues between UBR7 and P53

Using chemoproteomic platforms, investigators showed that members of the manumycin family of polyketides, which bore multiple potentially reactive sites, targetted C374 of the putative E3 ligase UBR7 in breast cancer cells, and engaged in molecular glue interactions with the neosubstrate tumor-suppressor TP53, leading to p53 transcriptional activation and cell death.
[Nature Chemical Biology]
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Mechanical Strain Induces Phenotypic Changes in Breast Cancer Cells and Promotes Immunosuppression in the Tumor Microenvironment

Researchers demonstrated that exposure to mechanical strain promoted invasive and pro-tumorigenic phenotypes in breast cancer cells, indicating that mechanical strain could impact the growth and proliferation of cancer cell, alter exosome production by breast cancer, and induce immunosuppression in the tumor microenvironment by dampening anti-tumor immunity.
[Laboratory investigation]
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Genentech’s Tecentriq in Combination With Chemotherapy (including Abraxane) Meets Primary Endpoint of Improved Pathological Complete Response, Regardless of PD-L1 Status, as Initial Treatment for People with Early Triple-Negative Breast Cancer

Genentech announced that the Phase III IMpassion031 study, evaluating Tecentriq® in combination with chemotherapy in comparison to placebo plus chemotherapy, met its primary endpoint by demonstrating a statistically significant and clinically meaningful improvement in pathological complete response for the treatment of people with early triple-negative breast cancer, regardless of PD-L1 expression.
[Genetech]
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YES1 Amplification Confers Trastuzumab–Emtansine (T-DM1) Resistance in HER2-Positive Cancer

The authors revealed that YES1 amplification conferred resistance to HER2-targeted drugs.
[British Journal of Cancer]
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