Rank ectopic expression in the presence of Neu and PyMT oncogenes alters mammary epithelial cell populations and their tumorigenic potential
In this study, we aimed to decipher whether Rank expression in the presence of PyMT and Neu oncogenes might affect the cell of origin of mammary gland tumors. We observed that Rank expression in PyMT+/ − and Neu+/ − mammary glands alters the basal and luminal mammary cell populations already in preneoplasic tissue, which may interfere with the tumor cell of origin restricting their tumorigenesis ability upon transplantation assays. In spite of this, Rank expression eventually promotes tumor aggressiveness once tumorigenesis is established. (Source: Journal of Mammary Gland Biology and Neoplasia)
Source: Journal of Mammary Gland Biology and Neoplasia - February 18, 2023 Category: Cancer & Oncology Source Type: research

Valine Treatment Enhances Antimicrobial Component Production in Mammary Epithelial Cells and the Milk of Lactating Goats Without Influencing the Tight Junction Barrier
AbstractThe production of antimicrobial components and the formation of less-permeable tight junctions (TJs) are important in the defense system of lactating mammary glands and for safe dairy production. Valine is a branched-chain amino acid that is actively consumed in the mammary glands and promotes the production of major milk components like β-casein; additionally, branched-chain amino acids stimulate antimicrobial component production in the intestines. Therefore, we hypothesized that valine strengthens the mammary gland defense system without influencing milk production. We investigated the effects of valine in vitr...
Source: Journal of Mammary Gland Biology and Neoplasia - February 18, 2023 Category: Cancer & Oncology Source Type: research

Rank ectopic expression in the presence of Neu and MMTV oncogenes alters mammary epithelial cell populations and their tumorigenic potential
In this study, we aimed to decipher whether Rank expression in the presence of PyMT and Neu oncogenes might affect the cell of origin of mammary gland tumors. We observed that Rank expression in PyMT+/ − and Neu+/ − mammary glands alters the basal and luminal mammary cell populations already in preneoplasic tissue, which may interfere with the tumor cell of origin restricting their tumorigenesis ability upon transplantation assays. In spite of this, Rank expression eventually promotes tumor aggressiveness once tumorigenesis is established. (Source: Journal of Mammary Gland Biology and Neoplasia)
Source: Journal of Mammary Gland Biology and Neoplasia - February 18, 2023 Category: Cancer & Oncology Source Type: research

Characterization of Hyaluronan Localization in the Developing Mammary Gland and Mammary Tumors
AbstractThe extracellular matrix (ECM) is biochemically and biomechanically important for the structure and function of the mammary gland, which undergoes vast structural changes throughout pubertal and reproductive development. Although hyaluronan (HA) is a ubiquitous glycosaminoglycan (GAG) of the mammary gland ECM, extensive characterization of HA deposition in the mammary gland is lacking. Understanding physiologic HA metabolism is critical as this tightly controlled system is often hijacked in cancer. In the current studies, we characterize HA regulation throughout mammary gland development to better understand subseq...
Source: Journal of Mammary Gland Biology and Neoplasia - January 27, 2023 Category: Cancer & Oncology Source Type: research

Protein Expression of PI3K/AKT/mTOR Pathway Targets Validated by Gene Expression and its Correlation with Prognosis in Canine Mammary Cancer
In conclusion, the data observed in this work are promising in the study of new molecular prognostic markers such asPI3K,ZEB2 andPARP1 for canine mammary cancer. (Source: Journal of Mammary Gland Biology and Neoplasia)
Source: Journal of Mammary Gland Biology and Neoplasia - November 2, 2022 Category: Cancer & Oncology Source Type: research

Thirteenth Annual ENBDC Workshop: Methods in Mammary Gland Biology and Breast Cancer
AbstractThe thirteenth annual workshop of the European Network for Breast Development and Cancer (ENBDC) Laboratories Annual Workshop took place on the 28 –30 April 2022 in Weggis, Switzerland and focused on methods in mammary gland biology and breast cancer. Sixty scientists participated in the ENBDC annual workshop which had not been held in person since 2019 due to the global COVID-19 pandemic. Topics spanned the mammary gland biology field, rang ing from lactation biology and embryonic development, single cell sequencing of the human breast, and stunning cutting-edge imaging of the mouse mammary gland and human breas...
Source: Journal of Mammary Gland Biology and Neoplasia - October 15, 2022 Category: Cancer & Oncology Source Type: research

Comparative Analysis of microRNAs that Stratify in vitro Mammary stem and Progenitor Activity Reveals Functionality of Human miR-92b-3p
This study is the first to perform small RNA sequencing in MDECs from various mammals and highlights that conserved miRNAs can have different functions in mammary stem/progenitor cells across species. (Source: Journal of Mammary Gland Biology and Neoplasia)
Source: Journal of Mammary Gland Biology and Neoplasia - October 3, 2022 Category: Cancer & Oncology Source Type: research

Comparative analysis of the molecular subtype landscape in canine and human mammary gland tumors
AbstractBreast cancers in humans belong to one of several intrinsic molecular subtypes each with different tumor biology and different clinical impact. Mammary gland tumors in dogs are proposed as a relevant comparative model for human breast cancer; however, it is still unclear whether the intrinsic molecular subtypes have the same significance in dogs and humans. Using publicly available data, we analyzed gene expression and whole-exome sequencing data from 158 canine mammary gland tumors. We performed molecular subtyping using the PAM50 method followed by subtype-specific comparisons of gene expression characteristics, ...
Source: Journal of Mammary Gland Biology and Neoplasia - August 6, 2022 Category: Cancer & Oncology Source Type: research

Induced mammary cancer in rat models: pathogenesis, genetics, and relevance to female breast cancer
AbstractMammary cancer, or breast cancer in women, is a polygenic disease with a complex etiopathogenesis. While much remains elusive regarding its origin, it is well established that chemical carcinogens and endogenous estrogens contribute significantly to the initiation and progression of this disease. Rats have been useful models to study induced mammary cancer. They develop mammary tumors with comparable histopathology to humans and exhibit differences in resistance or susceptibility to mammary cancer depending on strain. While some rat strains (e.g., Sprague-Dawley) readily form mammary tumors following treatment with...
Source: Journal of Mammary Gland Biology and Neoplasia - July 29, 2022 Category: Cancer & Oncology Source Type: research