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Resetting of the 24-nt siRNA landscape in rice zygotes
Genome Res. 2021 Dec 23:gr.275981.121. doi: 10.1101/gr.275981.121. Online ahead of print.ABSTRACTThe zygote, a totipotent stem cell, is crucial to the life cycle of sexually reproducing organisms. It is produced by the fusion of two differentiated cells - the egg and sperm, which in plants have radically different siRNA transcriptomes from each other, and from multicellular embryos. Due to technical challenges, the epigenetic changes that accompany the transition from differentiated gametes to totipotent zygote are poorly understood. Since siRNAs serve as both regulators and outputs of the epigenome, we performed here the ...
Source: Cell Research - December 24, 2021 Category: Cytology Authors: Chenxin Li Jonathan I Gent Hengping Xu Hong Fu Scott D Russell Venkatesan Sundaresan Source Type: research
A new liposomal nanocarrier for co-delivery of gedunin and p-glycoprotein siRNA to target breast cancer stem cells
Nat Prod Res. 2022 Jan 27:1-4. doi: 10.1080/14786419.2022.2032048. Online ahead of print.ABSTRACTGedunin is a secondary metabolite found in neem tree. Since the first discovery of this compound, its bio-active properties have been continuously evaluated. However, the low hydrophobicity of gedunin decreases its bioavailability and pharmacokinetic profile. In the present investigation, a new liposomal nanocarrier for co-delivery of gedunin and P-glycoprotein (P-gp) siRNA [siRNA coated liposomal gedunin (Lipo-Ged-siRNA)] was developed to improve the anti-proliferative activity of gedunin. Characteristics of prepared Lipo-Ged-...
Source: Natural Product Research - January 27, 2022 Category: Biochemistry Authors: Mohan Singh Rana Meran Keshawa Ediriweera Umapriyatharshini Rajagopalan Desiree Nedra Karunaratne Kamani Hemamala Tennekoon Sameera Ranganath Samarakoon Source Type: research
GSE87497 Evaluating Side Effects of Nanoparticle-mediated siRNA Delivery to Mesenchymal Stem Cells Using Next-generation Sequencing and Enrichment Analysis
This study investigates both intended and unintended effects of diblock copolymer nanoparticle (NP) delivery of siRNA delivery to human mesenchymal stem cells (hMSC). Specifically, siRNA delivery was investigated at a range of NP-siRNA:hMSC ratios with a focus on the effects of NP-siRNA treatment on hMSC functions. Additionally, next-generation RNA sequencing (RNA-seq) was used with enrichment analysis to observe side effects in hMSC gene expression. Results show NP-siRNA delivery is negatively correlated with hMSC density. However, higher NP-siRNA:hMSC ratios increased cytotoxicity and decreased metabolic activity. hMSC p...
Source: GEO: Gene Expression Omnibus - September 30, 2016 Category: Genetics & Stem Cells Tags: Expression profiling by high throughput sequencing Homo sapiens Source Type: research
Transplantation of IL-1 β siRNA-modified bone marrow mesenchymal stem cells ameliorates type II collagen-induced rheumatoid arthritis in rats
Exp Ther Med. 2022 Feb;23(2):139. doi: 10.3892/etm.2021.11062. Epub 2021 Dec 14.ABSTRACTRheumatoid arthritis (RA) is a chronic autoimmune disease that causes erosion of articular cartilage and bone and has adverse effects on both patients and livestock animals. The aim of the present study was to investigate the role of interleukin-1β (IL-1β) in the pathogenesis of RA, and to further determine whether injection of IL-1β small interfering RNA (siRNA) or transplantation of IL-1β siRNA + bone marrow mesenchymal stem cells (BMSCs) can ameliorate RA in rats. A collagen-induced arthritis (CIA) rat model was established by in...
Source: Experimental and Therapeutic Medicine - January 24, 2022 Category: General Medicine Authors: Shifeng Pan Xuan Dong Yan Wang Tiansheng Zhou Yuting Liu An Zhou Hua Xing Source Type: research
Resetting of the 24-nt siRNA landscape in rice zygotes RESEARCH
The zygote, a totipotent stem cell, is crucial to the life cycle of sexually reproducing organisms. It is produced by the fusion of two differentiated cells - the egg and sperm, which in plants have radically different siRNA transcriptomes from each other, and from multicellular embryos. Due to technical challenges, the epigenetic changes that accompany the transition from differentiated gametes to totipotent zygote are poorly understood. Since siRNAs serve as both regulators and outputs of the epigenome, we performed here the successful characterization of small RNA transcriptomes of zygotes from rice. Zygote small RNAs e...
Source: Genome Research - December 23, 2021 Category: Genetics & Stem Cells Authors: Li, C., Gent, J. I., Xu, H., Fu, H., Russell, S. D., Sundaresan, V. Tags: RESEARCH Source Type: research
Abstract 3903: A sub-set of DCLK1+ve colon cancer stem cells (CSCs) survive curcumin induced autophagy, while co-treatment with curcumin +DCLK1-siRNA eliminates CSCs: Role of long and short isofoms of DCLK1
Conclusion. Our studies strongly suggest that, 1) DCLK1 represents a functional protein for colon cancers, 2) combination of curcumin+DCLK1-siRNA may target and eradicate colon cancer stem cells., and 3) identifying small molecules that inhibit expression of S-isoform may allow to specifically target cancer stem cells, while sparing normal stem cells for cancer treatment purposes.
This work was supported by NIH Granst to PS (R01CA09795909 and RO1CA0975909-S1).
Citation Format: Shubhashish Sarkar, Malaney O'Connell, Carla, Kantara, Pomila Singh. A sub-set of DCLK1+ve colon cancer stem cells (CSCs) survive curcumin induced a...
Source: Cancer Research - September 30, 2014 Category: Cancer & Oncology Authors: Sarkar, S., O'Connell, M., Kantara, C., Singh, P. Tags: Tumor Biology Source Type: research
Exosomes from iPSCs Delivering siRNA Attenuate Intracellular Adhesion Molecule-1 Expression and Neutrophils Adhesion in Pulmonary Microvascular Endothelial Cells
In this study, we reprogrammed urine exfoliated renal epithelial cells into human induced pluripotent stem cells (huiPSCs) and purified the exosomes (Exo) from huiPSCs as RNAi delivery system. Through choosing the episomal system to deliver transcription factors, we obtained a non-integrating huiPSCs. Experiments in bothvitro andvivo demonstrated that these huiPSCs possess the pluripotent properties. The exosomes of huiPSCs isolated by differential centrifugation were visualized by transmission electron microscopy (TEM) showing a typical exosomal appearance with an average diameter of 122 nm. Immunoblotting confirmed the...
Source: Inflammation - December 20, 2016 Category: Allergy & Immunology Source Type: research
