Overexpression of ORP1C gene increases the rice resistance to Xanthomonas oryzae pv. oryzae through negatively regulating transcription activator-like effectors translocation

Article

Author: Ji, Hongtao ; Zhou, Lan ; Sun, Mengjie ; Yang, Ruibin ; Xu, Mingliang ; Qian, Hengjie ; Tong, Jingyi

Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae (Xoo) has shown a high incidence rate in rice fields in recent years. Rice resistance breeding is considered as the most effective method for achieving economical and sustainable management of BLB disease. The essential basis for resistance breeding is rooted in the exploration of rice resistance genes and the clarification of the molecular mechanisms that underlie Xoo resistance. In our previous research, we showed that Xanthomonas outer protein XopZ and rice oxysterol-binding related protein ORP1C collaboratively regulate the compatible interaction between Xoo strain PXO99 and Nipponbare rice, but the deeper regulatory mechanisms remain unknown. In this study, we successfully constructed ORP1C overexpression rice using the plant binary expression vector pCAMBIA1301. Through a series of virulence and effector translocation detections in Xoo-rice interactions, we revealed that overexpression of the ORP1C gene largely increases rice resistance to multiple Xoo strains from different countries and regions. Mechanistically, ORP1C plays a Xoo resistant role through negatively regulating transcription activator-like effectors (TALEs) translocation, ORP1C has become a potential candidate gene resource for disease-resistant breeding in rice. Further studies also indicated that XopZ and ORP1C collaboratively regulate the compatible interaction of PXO99-Nipponbare by modulating TALEs translocation.

25 Sep 2025·Journal of Molecular Endocrinology

Establishment of Star-edited Y1 cells as a novel in vitro functional assay for STAR

Article

Author: Ichihashi, Yosuke ; Shimura, Kazuhiro ; Narumi, Satoshi ; Hasegawa, Tomonobu ; Sakuma, Tetsushi ; Ishii, Tomohiro ; Yamamoto, Takashi ; Sato, Takeshi

Genetic variants involving steroidogenic acute regulatory protein cause lipoid congenital adrenal hyperplasia, which is characterized by impaired steroidogenesis in the adrenal glands and gonads. Functional assessment of variant STAR proteins is necessary for an accurate genetic diagnosis. Ideally, steroidogenic cells should be used to assess the functionality of STAR proteins, but the presence of endogenous STARs in steroidogenic cells precludes such a method. Here, we generated Star-edited cells from steroidogenic Y1 mouse adrenocortical tumor cells by genome editing. Star-edited Y1 cells exhibited very low but measurable cAMP-dependent pregnenolone production. Furthermore, stimulation of the cAMP pathway for 2 weeks resulted in the formation of lipid droplets in the cytoplasm of Star-edited Y1 cells, which resembled the histology of the adrenal glands of patients with lipoid congenital adrenal hyperplasia. The steroidogenic defect of Star-edited Y1 cells can be restored by transient overexpression of mouse Star. We found that human STAR can also restore defective steroidogenesis in Star-edited Y1 cells, and we were able to construct a novel in vitro system to evaluate human STAR variants. Collectively, we established Star-edited Y1 cells that retain the steroidogenic pathway downstream of the Star protein. Star-edited Y1 cells recapitulate the functional and morphological changes of lipoid congenital adrenal hyperplasia and can be used to evaluate the functionality of human STAR variants.

01 Sep 2025·Biomaterials

Metal-free antioxidant nanozyme incorporating bioactive hydrogel as an antioxidant scaffold for accelerating bone reconstruction

Article

Author: Yang, Yang ; Shi, Jie ; Zhao, Chaoyue ; Chen, Bo ; Li, Changyi ; Zeng, Qianrui ; Liang, Yunkai ; Wang, Wanmeng ; Li, Wei ; Guan, Qingxin

Oxidative stress at bone defect sites mediates inflammation and even osteoblast apoptosis, severely hindering the repair process. While current antioxidant bone tissue engineering (BTE) scaffolds lack broad-spectrum reactive oxygen species (ROS) scavenging capability and structure-activity elucidation. Herein, we report a three-dimensional nitrogen-doped carbon antioxidant nanozyme (ZIFC) derived from metal-organic frameworks, which exhibits cascading superoxide dismutase- and catalase-like activities, along with the ability to scavenge other harmful free radicals. Through the experimental studies and theoretical calculations, we reveal that the catalase-like activity arises from the synergistic catalytic interaction between graphitized pyridinic nitrogen and its adjacent carbon atom. Moreover, hybrid double network hydrogel integrated with ZIFC is utilized to construct composite scaffold (Gel/ZIFC) by 3D printing. In vivo transcriptome analysis confirms that Gel/ZIFC can rapidly activate antioxidant defense system and suppress local inflammation under oxidative stress microenvironment, thereby protecting cells from oxidative damage. Subsequently, owing to the unique osteoinductive property of carbon nanomaterials and the osteoconductive property of 3D-printed scaffold, Gel/ZIFC composite scaffold exhibits desirable bone repair efficacy. The elucidation of structure-activity relationship and therapeutic mechanism provides new insights and guidance for devising antioxidant BTE scaffolds, and demonstrates their feasibility for clinical application.

100 Deals associated with Cyclic adenosine phosphate

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R&D Status

10 top approved records.

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Indication	Country/Location	Organization	Date
Angina Pectoris	China	SPH No. 1 Biochemical & Pharmaceutical Co., Ltd.	01 Jan 1995
Myocardial Infarction	China	SPH No. 1 Biochemical & Pharmaceutical Co., Ltd.	01 Jan 1995
Myocarditis	China	SPH No. 1 Biochemical & Pharmaceutical Co., Ltd.	01 Jan 1995
Shock, Cardiogenic	China	SPH No. 1 Biochemical & Pharmaceutical Co., Ltd.	01 Jan 1995

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