Automated Spatially Targeted Optical Microproteomics (autoSTOMP) to Determine Protein Complexity of Subcellular Structures.

Automated Spatially Targeted Optical Microproteomics (autoSTOMP) to Determine Protein Complexity of Subcellular Structures.
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DOI:
10.1021/acs.analchem.9b04396
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发表时间:
2020-01-21
影响因子:
7.4
通讯作者:
Ewald SE
Ewald SE
中科院分区:
化学1区
文献类型:
--
作者:
Yin B;Mendez R;Zhao XY;Rakhit R;Hsu KL;Ewald SE

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Tissue microenvironment properties like blood flow, extracellular matrix, or proximity to immune infiltrate are important regulators of cell biology. However, methods to study regional protein expression in the native tissue environment are limited. To address this need, we developed a novel approach to visualize, purify and measure proteins in situ using Automated Spatially Targeted Optical Micro Proteomics (AutoSTOMP). Here we report custom codes to specify regions of heterogeneity in a tissue section and UV biotinylate proteins within those regions. We have developed LC-MS/MS compatible biochemistry to purify those proteins and label-free quantification methodology to determine protein enrichment in target cell types or structures relative to non-target regions in the same sample. These tools were applied to a) identify inflammatory proteins expressed by CD68+ macrophages in rat cardiac infarcts and b) characterize inflammatory proteins enriched in IgG4+ lesions in human esophageal tissue. These data indicate that AutoSTOMP is a flexible approach to determine regional protein expression in situ on a range of primary tissues and clinical biopsies where current tools and sample availability are limited.
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