Nrf2 (Nuclear factor erythroid 2-related factor 2) is a master transcription factor that regulates cellular antioxidant defense and tissue homeostasis. Dysregulation of Nrf2 has been implicated in a wide range of diseases, including cancer, neurodegenerative, cardiovascular, metabolic, and inflammatory disorders, making Nrf2 pathway an important focus for disease research and therapeutic development.

arigo offers comprehensive research tools supporting the investigation of Nrf2 signaling, antioxidant defense, oxidative stress, and downstream pathway regulation.

 

● Keap1-Nrf2-ARE pathway for Antioxidant Defense

Under normal conditions, Nrf2 undergoes Keap1-mediated ubiquitination and proteasomal degradation, maintaining low basal levels. Under oxidative stress, Keap1 modification disrupts Nrf2 degradation, allowing Nrf2 to accumulate and translocate to the nucleus, where it binds antioxidant response elements (AREs) and induces antioxidant and detoxification proteins, including NQO1 and HO-1.

arigo's Keap1-Nrf2-ARE Antibody Panel (ARG30345) is designed to facilitate research into the Keap1/Nrf2/ARE pathway, supporting the investigation of Nrf2-mediated antioxidant responses and cellular stress defense.

 

 

 

● Nrf2 and Autophagy

Nrf2 also contributes to the regulation of autophagy by inducing the expression of autophagy-related proteins, including LC3B and SQSTM1. SQSTM1 promotes Keap1 autophagic degradation, establishing a positive feedback loop that enhances Nrf2 activation and antioxidant defense. arigo's Autophagy Antibody Panel (ARG30321) supports research into the interplay between Nrf2 and autophagy.

 

 

 

● Nrf2-mediated NADPH-GSH-TRX axis

In addition to promoting ROS detoxification through NQO1 and HO-1, Nrf2 plays a critical role in maintaining cellular redox homeostasis through the NADPH-GSH-TRX axis. Glutathione (GSH) and thioredoxin (TRX) are two major cellular redox systems that rely on NADPH to sustain their reducing capacity. Nrf2 coordinates this redox network by promoting the biosynthesis of GSH, TRX, and NADPH, and inducing detoxification and antioxidant enzymes that protect cells from oxidative damage.

arigo offers a series of research tools to support advanced studies of Nrf2 signaling and NADPH-GSH-TRX axis.

 

 

● Nrf2 and Mitochondria Quality Control (MQC)

Mitochondria are the primary source of cellular energy (ATP) and major targets of ROS-induced damage. Mitochondrial quality control (MQC) maintains mitochondrial function by sustaining energy production and limiting oxidative damage. Nrf2 regulates MQC by coordinating mitochondrial biogenesis and mitophagy, thereby maintaining cellular energy and redox homeostasis.

Nrf2 promotes mitochondrial biogenesis by upregulating the master regulator PGC-1α. It also induces mitophagy by regulating mitophagy-related proteins PINK1, Parkin, NDP52, and LC3B. arigo provides Mitochondrial Biogenesis (ARG30358) and PINK1-Parkin Mitophagy (ARG30359) antibody panels to support the investigation of Nrf2-regulated MQC.

 

 

 

● Nrf2 and Ferroptosis

Ferroptosis is an iron-dependent cell death characterized by lipid peroxidation and impairment of the GSH–GPX4 antioxidant defense system. Nrf2 suppresses ferroptosis by maintaining iron homeostasis, promoting GSH synthesis, and enhancing lipid peroxide detoxification.

Iron Homeostasis
Excessive intracellular Fe²⁺ levels trigger ferroptosis. Nrf2 upregulates FPN1 to promote iron export and Ferritin (including FTH1 and FTL) to enhance iron storage, thereby reducing intracellular Fe²⁺ pool and inhibiting ferroptosis.

GSH Synthesis
GSH is a key antioxidant for lipid peroxide detoxification. Nrf2 upregulates xCT to enhance cysteine uptake, as well as GCLC and GCLM to promote GSH synthesis, providing sufficient GSH for antioxidant defense.

Lipid Peroxide Detoxification
GPX4 uses GSH to reduce lipid peroxides. Nrf2 also upregulates GPX4 expression, enhancing GSH-dependent lipid peroxide detoxification and protecting cells from ferroptosis.

arigo's Ferroptosis (ARG30337) and Ferroptosis Regulator (ARG30357) antibody panels are ideal tools for investigating the molecular mechanism of Nrf2-regulated ferroptosis.

 

 

 

● Nrf2 and Programmed Cell Death

Nrf2 not only inhibits ferroptosis but also regulates apoptosis and cuproptosis. Nrf2 suppresses apoptosis by upregulating the anti-apoptotic proteins Bcl-2 and Bcl-xL. It also inhibits cuproptosis by inducing Metallothionein expression, thus buffering the intracellular copper accumulation. arigo provides quality antibodies to support advanced research into the regulatory mechanisms of Nrf2 in apoptosis and cuproptosis.