The present study describes the behavior of in vitro grown normal human oral mucosal epithelial cells and that of a tumorigenic epithelial cell line following subcutaneous inoculation into nude mice. A successful recovery of viable human epithelial cell inocula was seen in 25-90% of mice and there was no improvement in recovery rates after addition of fibroblasts. These inocula resulted in cyst formation lined by a 2-6 cell layer unkeratinized squamous epithelium without rete ridges. There was no increase in recovery rate or size of cysts when coinoculated with fibroblasts. The tumorigenic cell inocula were successfully recovered in all cases. Tumors established from these inocula had a low grade of differentiation and were without signs of metastasis. Inocula of tumorigenic cells showed an increased size after addition of fibroblasts to the inocula. The model may be useful in studies of interactions between inoculations of heterologous normal and pathologic cells as well as in studies of differentiation of carcinogen-treated epithelial cells.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1159/000163511 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
The endonuclease activity of MCPIP1 controls the neoplastic transformation of epithelial cells via the c-Met/CD44 axis.
Cell Commun Signal
January 2025
Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.
The RNase activity of MCPIP1 is essential for regulating cellular homeostasis, proliferation, and tumorigenesis. Our study elucidates the effects of downregulation of MCPIP1 expression and an RNase-inactivating mutation (D141N) on normal epithelial kidney cells, indicating that MCPIP1 expression is a key factor that suppresses neoplastic transformation. We observed that either expression downregulation or mutation of MCPIP1 significantly increased its clonogenicity and altered the expression of cancer stem cell (CSC) markers and factors involved in epithelial-to-mesenchymal transition (EMT).
View Article and Find Full Text PDFComprehensive genome-scale CRISPR knockout screening of CHO cells.
Sci Data
January 2025
Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea.
Chinese hamster ovary (CHO) cells play a pivotal role in the production of recombinant therapeutics. In the present study, we conducted a genome-scale pooled CRISPR knockout (KO) screening using a virus-free, recombinase-mediated cassette exchange-based platform in CHO-K1 host and CHO-K1 derived recombinant cells. Genome-wide guide RNA (gRNA) amplicon sequencing data were generated from cell libraries, as well as short- and long-term KO libraries, and validated through phenotypic assessment and gRNA read count distribution.
View Article and Find Full Text PDFElucidating the role of pyrimidine metabolism in prostate cancer and its therapeutic implications.
Sci Rep
January 2025
Department of Emergency Medicine, Hengyang Medical School, The Affiliated Changsha Central Hospital, University of South China, Changsha, Hunan, China.
Our study aims to investigate the role of pyrimidine metabolism in prostate cancer and its associations with the immune microenvironment, drug sensitivity, and tumor mutation burden. Through transcriptomic and single-cell RNA sequencing analyses, we explored metabolic pathway enrichment, immune infiltration patterns, and differential gene expression in prostate cancer samples. The results showed that pyrimidine metabolism-related genes were significantly upregulated in the P2 subgroup compared to the P1 subgroup, with enhanced metabolic activity observed in basal and luminal epithelial cells.
View Article and Find Full Text PDFCytotoxic mechanisms of pemetrexed and HDAC inhibition in non-small cell lung cancer cells involving ribonucleotides in DNA.
Sci Rep
January 2025
Department of Clinical and Molecular Medicine, Norwegian University of Science and Technology, N-7491, Trondheim, Norway.
The cytotoxic mechanisms of thymidylate synthase inhibitors, such as the multitarget antifolate pemetrexed, are not yet fully understood. Emerging evidence indicates that combining pemetrexed with histone deacetylase inhibitors (HDACi) may enhance therapeutic efficacy in non-small cell lung cancer (NSCLC). To explore this further, A549 NSCLC cells were treated with various combinations of pemetrexed and the HDACi MS275 (Entinostat), and subsequently assessed for cell viability, cell cycle changes, and genotoxic markers.
View Article and Find Full Text PDFMutated IL-32θ (A94V) inhibits COX2, GM-CSF and CYP1A1 through AhR/ARNT and MAPKs/NF-κB/AP-1 in keratinocytes exposed to PM.
Sci Rep
January 2025
Department of Bioscience and Biotechnology, Konkuk University, Seoul, 05029, Republic of Korea.
Exposure to particulate matter (PM) in the air harms human health. Most studies on particulate matter's (PM) effects have primarily focused on respiratory and cardiovascular diseases. Recently, IL-32θ, one of the IL-32 isoforms, has been demonstrated to modulate cancer development and inflammatory responses.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!