La3+-promoted proliferation is interconnected with apoptosis in NIH 3T3 cells

Area of Science:

• Cell Biology
• Biochemistry
• Toxicology

Background:

• Lanthanum ion (La3+) is known to influence cellular processes.
• Previous studies suggest La3+ affects cell proliferation and apoptosis.
• The precise mechanisms of La3+ on cell cycle regulation remain under investigation.

Purpose of the Study:

• To investigate the effects of lanthanum ion (La3+) on NIH 3T3 cell proliferation and apoptosis.
• To elucidate the role of cell cycle alterations and extracellular signal-regulated kinase (ERK) signaling in La3+-induced cellular responses.
• To explore the potential interconnection between proliferation and apoptosis induced by La3+.

Main Methods:

• Treatment of NIH 3T3 cells with varying concentrations of La3+.
• Cell cycle analysis using flow cytometry.
• Western blot analysis to detect phosphorylated extracellular signal-regulated kinase (p-ERK).
• Inhibition of ERK phosphorylation using PD98059.

Main Results:

• La3+ promoted both proliferation and apoptosis of NIH 3T3 cells at identical concentrations.
• La3+ facilitated cell cycle progression from G1 to S phase, but these proliferating cells eventually underwent apoptosis.
• La3+ induced ERK phosphorylation, and inhibiting this phosphorylation with PD98059 suppressed both proliferation and apoptosis.
• La3+-induced proliferation and apoptosis were correlated with cell cycle alterations.

Conclusions:

• Lanthanum ion (La3+) exhibits a dual role in NIH 3T3 cells, promoting both proliferation and apoptosis.
• The observed effects are linked to cell cycle modulation and are dependent on extracellular signal-regulated kinase (ERK) signaling.
• These findings support the hypothesis that cell proliferation and apoptosis are intrinsically coordinated processes.