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Fluorescein-based sensors to purify human α-cells for functional and transcriptomic analyses
Fluorescein-based sensors to purify human α-cells for functional and transcriptomic analyses
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Length:
20 minutes
Released:
Nov 28, 2022
Format:
Podcast episode
Description
Link to bioRxiv paper:
http://biorxiv.org/cgi/content/short/2022.11.27.518097v1?rss=1
Authors: Kahraman, S., Shibue, K., De Jesus, D. F., Hu, J., Manna, D., Wagner, B., Choudhary, A., Kulkarni, R. N.
Abstract:
Pancreatic -cells secrete glucagon, an insulin counter-regulatory peptide hormone critical for the maintenance of glucose homeostasis. Investigation of the function of human -cells remains a challenge due to the lack of cost-effective purification methods to isolate high-quality -cells from islets. Here, we use the reaction-based probe diacetylated Zinpyr1 (DA-ZP1) to introduce a novel and simple method for enriching live -cells from dissociated human islet cells with greater than 97% purity. The -cells, confirmed by sorting and immunostaining for glucagon, were cultured up to 10 days to form -pseudoislets. The -pseudoislets could be maintained in culture without significant loss of viability, and responded to glucose challenge by secreting appropriate levels of glucagon. RNA-sequencing analyses (RNA-seq) revealed that expression levels of key -cell identity genes were sustained in culture while some of the genes such as DLK1, GSN, SMIM24 were altered in -pseudoislets in a time-dependent manner. In conclusion, we report a method to sort human primary -cells with high purity that can be used for downstream analyses such as functional and transcriptional studies.
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Podcast created by Paper Player, LLC
http://biorxiv.org/cgi/content/short/2022.11.27.518097v1?rss=1
Authors: Kahraman, S., Shibue, K., De Jesus, D. F., Hu, J., Manna, D., Wagner, B., Choudhary, A., Kulkarni, R. N.
Abstract:
Pancreatic -cells secrete glucagon, an insulin counter-regulatory peptide hormone critical for the maintenance of glucose homeostasis. Investigation of the function of human -cells remains a challenge due to the lack of cost-effective purification methods to isolate high-quality -cells from islets. Here, we use the reaction-based probe diacetylated Zinpyr1 (DA-ZP1) to introduce a novel and simple method for enriching live -cells from dissociated human islet cells with greater than 97% purity. The -cells, confirmed by sorting and immunostaining for glucagon, were cultured up to 10 days to form -pseudoislets. The -pseudoislets could be maintained in culture without significant loss of viability, and responded to glucose challenge by secreting appropriate levels of glucagon. RNA-sequencing analyses (RNA-seq) revealed that expression levels of key -cell identity genes were sustained in culture while some of the genes such as DLK1, GSN, SMIM24 were altered in -pseudoislets in a time-dependent manner. In conclusion, we report a method to sort human primary -cells with high purity that can be used for downstream analyses such as functional and transcriptional studies.
Copy rights belong to original authors. Visit the link for more info
Podcast created by Paper Player, LLC
Released:
Nov 28, 2022
Format:
Podcast episode
Titles in the series (100)
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