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Anti-HIV activity in vitro of MGN-3, an activated arabinoxylane from rice bran
1Department of Otolaryngology, Drew University of Medicine and Science, Los Angeles, California 90056, USA.
Abstract:
MGN-3 an arabinoxylane from rice bran that has been enzymatically modified with extract from Hyphomycetes mycelia, was tested for anti-HIV activity in vitro. MGN-3 activity against HIV-1 (SF strain) was examined in primary cultures of peripheral blood mononuclear cells. MGN-3 inhibited HIV-1 replication by: (1) inhibition of HIV-1 p24 antigen production in a dose dependent manner--MGN-3 concentrations of 12.5, 25, 50, and 100 micrograms/ml showed 18.3, 42.8, 59, and 75% reduction in p24 antigen, respectively; and (2) inhibition of syncytia formation maximized (75%) at concentrations of 100 micrograms/ml. Further studies showed that ingestion of MGN-3 at concentration of 15 mg/kg/day resulted in a significant increase in T and B cell mitogen response at 2 months after treatment: 146% for PHA, 140% for Con A, and 136.6% for PWM mitogen. We conclude that MGN-3 possesses potent anti-HIV activity and in the absence of any notable side effects, MGN-3 shows promise as an agent for treating patients with AIDS.
Insights
MGN-3, a modified rice bran arabinoxylane, demonstrates potent in vitro anti-HIV activity by inhibiting viral replication and syncytia formation. This compound also enhances immune cell response, showing promise for AIDS treatment with no observed side effects.
Area of Science:
- Immunology
- Virology
- Biochemistry
Background:
- Human Immunodeficiency Virus (HIV) remains a significant global health challenge.
- Current treatments for Acquired Immunodeficiency Syndrome (AIDS) can have notable side effects.
- There is a continuous need for novel therapeutic agents with improved efficacy and safety profiles.
Purpose of the Study:
- To evaluate the in vitro anti-HIV activity of MGN-3, a modified arabinoxylane derived from rice bran.
- To investigate the impact of MGN-3 on HIV replication markers, including p24 antigen production and syncytia formation.
- To assess the effects of MGN-3 on immune cell function, specifically T and B cell mitogen response.
Main Methods:
- MGN-3, an enzymatically modified arabinoxylane from rice bran, was tested against HIV-1 (SF strain) in primary peripheral blood mononuclear cells.
- HIV-1 replication was assessed by measuring p24 antigen production and syncytia formation at various MGN-3 concentrations.
- Immune cell response was evaluated by measuring T and B cell mitogen response (PHA, Con A, PWM) after oral administration of MGN-3 in vivo.
Main Results:
- MGN-3 exhibited dose-dependent inhibition of HIV-1 p24 antigen production, with up to 75% reduction at 100 micrograms/ml.
- Syncytia formation was inhibited by MGN-3, with maximal inhibition of 75% observed at 100 micrograms/ml.
- Oral administration of MGN-3 (15 mg/kg/day) significantly increased T and B cell mitogen response (136.6-146%) after 2 months.
Conclusions:
- MGN-3 demonstrates potent in vitro anti-HIV activity through inhibition of viral replication.
- MGN-3 enhances immune cell responsiveness, suggesting a potential immunomodulatory effect.
- MGN-3 shows promise as a therapeutic agent for AIDS treatment with a favorable safety profile.