Related Experiment Video
Updated: Feb 13, 2026
Use of the Pyrimidine Analog, 5-Iodo-2′-Deoxyuridine IdU with Cell Cycle Markers to Establish Cell Cycle Phases in a Mass Cytometry Platform
Published on: October 22, 2021
2-Methyl 2-butanol suppresses human retinoblastoma cells through cell cycle arrest and autophagy
Xiangyun Li1, Xiangxiang Zhu2, Chong Xu1
1Department of Fundus, Wuhan Aier Eye Hospital, Wuhan, Hubei Province, China.
Abstract:
2-Methyl-2-butanol (MBT) is a chemical compound from the group of alcohols more specifically pentanols, which has shown an excellent anti-cancer activity in our previous study. However, its mechanism of action remains unclear. The present study was designed to investigate the anti-cancer effect of MBT on human retinoblastoma cells. The results showed that the use of MBT leads to HXO-RB44 cell death but is cytotoxic to normal cells at higher concentrations. It showed a dose- as well as a time-dependent inhibition of HXO-RB44 cells. P27 is a cell cycle inhibitory protein, which plays an important role in cell cycle regulation whereas cyclin-B1 is a regulatory protein involved in mitosis. MBT increased the cell cycle arrest in a dose-dependent manner by augmenting p27 and reducing cyclin B1 expression. Moreover, it also accelerated apoptosis, increased light chain-3 (LC-3) conversion in a dose-dependent manner, and helped to debulk cancerous cells. LC3 is a soluble protein, which helps to engulf cytoplasmic components, including cytosolic proteins and organelles during autophagy from autophagosomes. In order to verify the effect of MBT, bafilomycin A1, an autophagy inhibitor, was used to block the MTB-induced apoptosis and necrosis. Additionally, a specific Akt agonist, SC-79, reversed the MBT-induced cell cycle arrest and autophagy. Thus, from the present study, it was concluded that MBT induced cell cycle arrest, apoptosis and autophagy through the PI3K/Akt pathway in HXO-RB44 cells.
Insights
2-Methyl-2-butanol (MBT) effectively inhibits human retinoblastoma cell growth by inducing cell cycle arrest, apoptosis, and autophagy. This alcohol compound shows promise as an anti-cancer agent, targeting cancerous cells while sparing normal ones at therapeutic doses.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- 2-Methyl-2-butanol (MBT), a pentanol, demonstrated anti-cancer potential in prior research.
- The precise mechanism of MBT's anti-cancer action, particularly in retinoblastoma, requires elucidation.
Purpose of the Study:
- To investigate the anti-cancer effects and underlying mechanisms of MBT on human retinoblastoma cells (HXO-RB44).
Main Methods:
- Assessed MBT's impact on HXO-RB44 cell viability, cell cycle progression, apoptosis, and autophagy.
- Analyzed the expression of cell cycle regulators (p27, cyclin-B1) and autophagy markers (LC-3 conversion).
- Utilized bafilomycin A1 (autophagy inhibitor) and SC-79 (Akt agonist) to validate MBT's mechanism.
Main Results:
- MBT induced dose- and time-dependent HXO-RB44 cell death, with minimal cytotoxicity to normal cells at effective concentrations.
- MBT promoted cell cycle arrest by increasing p27 and decreasing cyclin B1 expression.
- MBT accelerated apoptosis and autophagy, evidenced by increased LC-3 conversion, via the PI3K/Akt pathway.
Conclusions:
- MBT exhibits significant anti-cancer activity against human retinoblastoma cells.
- The anti-cancer effects of MBT are mediated through the induction of cell cycle arrest, apoptosis, and autophagy.
- MBT's mechanism involves the PI3K/Akt signaling pathway, suggesting its therapeutic potential for retinoblastoma.
Related Concept Videos
01:13meta-Directing Deactivators: –NO2, –CN, –CHO, –CO2R, –COR, –CO2H
01:202° Amines to N-Nitrosamines: Reaction with NaNO2
00:56What is the Cell Cycle?
01:04What is the Cell Cycle?
02:14SN2 Reaction: Kinetics
In a chemical reaction, a relationship exists between the concentration of reactants and the rate at which the reaction proceeds. The study to measure this relationship is known as the kinetics of a chemical reaction. Kinetic studies are used to deduce the rate law of a chemical reaction, which provides information about the species involved during the transition state of the rate-determining step. Thus, kinetic studies help to derive the mechanism of a...
02:27SN2 Reaction: Mechanism
The presence of the more electronegative halogen in the substrate creates a polarized carbon-halide bond. The halide pulls the electron cloud generating an electrophilic center at the carbon atom. Thus, the carbon atom carries a partial positive charge while the halide has a...