Transimmortalized mouse intestinal cells (m-ICc12) that maintain a crypt phenotype

Area of Science:

• Cell Biology
• Gastroenterology
• Transgenic Mouse Models

Background:

• Immortalized cell lines are crucial for studying cellular functions and disease mechanisms.
• Developing cell lines that retain differentiated characteristics of primary cells is challenging.
• Transgenic mouse models offer unique opportunities for generating specialized cell lines.

Purpose of the Study:

• To establish and characterize a novel immortalized cell line from the small intestine of transgenic mice.
• To assess the retention of differentiated intestinal crypt cell features in the immortalized cell line.
• To evaluate the utility of the m-ICc12 cell line for biological research.

Main Methods:

• Generation of immortalized cells (m-ICc12) from L-type pyruvate kinase (L-PK)/TAg1 transgenic mouse fetuses.
• Characterization of cell properties including nuclear antigen expression, lifespan, tumorigenicity, and monolayer formation.
• Analysis of differentiated cell markers, tight junction proteins, microvilli, and specific enzyme/receptor expression.

Main Results:

• m-ICc12 cells expressed nuclear large T antigen, were nontumorigenic, and had a prolonged lifespan.
• The cells formed confluent monolayers with tight junctions, developed microvilli, and exhibited dome formation.
• m-ICc12 cells retained expression of key intestinal markers such as cytokeratins, villin, sucrase isomaltase, and polymeric immunoglobulin receptor.

Conclusions:

• The m-ICc12 cell line successfully models intestinal crypt cells, maintaining crucial differentiated functions in culture.
• Targeted oncogenesis in transgenic mice provides an effective strategy for creating relevant cell lines.
• This cell line serves as a valuable tool for investigating intestinal biology and related diseases.