東北大学 · 生化学・遺伝学・分子生物学
岡崎慶人教授の研究室では、がんの発がん・治療抵抗性のメカニズムを解明するため、転写制御と酸化的なシグナル伝達の関係に焦点を当てた研究を行っています。特に、NRF2という転写因子の持続的活性化が非小細胞肺癌において腫瘍の進行を促進するメカニズムや、CEBPBとの協働によるエピジェネティックなエクストリーム・エンドマーク形成の解明を目指しています。これにより、がん治療の新たな標的創出や個別化医療の基盤構築を目指しています。
Figures are computed from collected data and may differ slightly.
Transcriptional dysregulation, which can be caused by genetic and epigenetic alterations, is a fundamental feature of many cancers. A key cytoprotective transcriptional activator, NRF2, is often aberrantly activated in non-small cell lung cancers (NSCLCs) and supports both aggressive tumorigenesis and therapeutic resistance. Herein, we find that persistently activated NRF2 in NSCLCs generates enhancers at gene loci that are not normally regulated by transiently activated NRF2 under physiological
The KEAP1-NRF2 system is a sulfur-employing defense mechanism against oxidative and electrophilic stress. NRF2 is a potent transcription activator for genes mediating sulfur-involving redox reactions, and KEAP1 controls the NRF2 activity in response to the stimuli by utilizing reactivity of sulfur atoms. In many human cancer cells, the KEAP1-mediated regulation of NRF2 activity is abrogated, resulting in the persistent activation of NRF2. Persistently activated NRF2 drives malignant progression
NRF2 is a transcription activator that plays a key role in cytoprotection against oxidative stress. Although increased NRF2 activity is principally beneficial for our health, NRF2 activation in cancer cells is detrimental, as it drives their malignant progression. We previously found that CCAAT/enhancer-binding protein B (CEBPB) cooperates with NRF2 in NRF2-activated lung cancer and enhances tumour-initiating activity by promoting NOTCH3 expression. However, the general contribution of CEBPB in
Summary Transcriptional dysregulation, which can be caused by genetic and epigenetic alterations, is a fundamental feature of many cancers. A key cytoprotective transcriptional activator, NRF2, is often aberrantly activated in non-small cell lung cancers (NSCLCs) and supports both aggressive tumorigenesis and therapeutic resistance. Herein, we found that persistently activated NRF2 in NSCLCs generates enhancers at gene loci that are not normally regulated by transiently activated NRF2 under phys
A Correction to this paper has been published: https://doi.org/10.1038/s41467-021-20927-9.
Abstract Regnase-1, encoded by the ZC3H12A gene, is a well-known RNase that suppresses inflammation by degrading the mRNAs of inflammatory cytokines. However, its role in cancer pathogenesis, especially in non-small cell lung cancer (NSCLC), remains poorly understood. Through an analysis of public databases, we found that NSCLC patients with higher ZC3H12A expression levels had a worse prognosis than those with lower levels. To explore the function of Regnase-1 in NSCLC, we knocked out the ZC3H1
Regnase-1, encoded by the ZC3H12A gene, is a well-known RNase that suppresses inflammation by degrading the mRNAs of inflammatory cytokines. However, its role in cancer pathogenesis, especially in non-small cell lung cancer (NSCLC), remains poorly understood. Through an analysis of public databases, we found that NSCLC patients with higher ZC3H12A expression levels had a worse prognosis than those with lower levels. To explore the function of Regnase-1 in NSCLC, we knocked out the ZC3H12A gene i
Sulfur, like oxygen, belongs to Group 16 of the periodic table and is characterized by its flexibility in both donating and accepting electrons, as well as its wide range of oxidation states. These properties enable sulfur to participate in diverse redox reactions. In biological systems, sulfur plays vital roles as a component of catalytic centers of enzymes and as a redox sensor. Moreover, sulfur is the only element known to form stable linear chains through homoelemental bonding, a phenomenon
Light chain-only variant of proliferative glomerulonephritis with monoclonal immunoglobulin deposits (PGNMID-LC) and light chain deposition disease (LCDD) are both renal disorders caused by the overproduction of monoclonal immunoglobulin light chains and their deposition in renal tissues. However, the renal pathological features of these two entities are characteristically distinct. We report a rare case of multiple myeloma presenting with renal pathology exhibiting overlapping features of both
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