PMID- 35044652 OWN - NLM STAT- MEDLINE DCOM- 20220330 LR - 20240329 IS - 1940-6029 (Electronic) IS - 1064-3745 (Print) IS - 1064-3745 (Linking) VI - 2413 DP - 2022 TI - Immunofluorescence-Based Method to Assess Cancer Biomarker in the Hypoxic Region of the Tumor. PG - 37-43 LID - 10.1007/978-1-0716-1896-7_5 [doi] AB - The development of novel imaging technologies allows the analysis of the expression and spatial distribution of multiple markers simultaneously, providing necessary information about a cellular identity and the surrounding microenvironment. This chapter describes the utilization of immunofluorescence to identify such biomarkers in fixed tissue from prostate cancer (PCa) xenografts. One such marker detectable by immunofluorescence is pimonidazole, which has been utilized to locate areas of low oxygen (hypoxia). Pimonidazole, in combination with other biomarkers, could be utilized to identify "niches" in the microenvironment harboring more aggressive cells both within and outside hypoxic areas. Specifically, we describe the method to use pimonidazole for the identification of hypoxic regions in PCa xenograft tumors along with CPT1A (carnitine palmitoyltransferase 1A) expression, an indicator of beta-oxidation. This approach could be useful to characterize various biomarkers in the complex hypoxic tumor microenvironment. CI - (c) 2022. Springer Science+Business Media, LLC, part of Springer Nature. FAU - Rios-Colon, Leslimar AU - Rios-Colon L AD - Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, USA. AD - Julius L. Chambers Biomedical Biotechnology Research Institute, North Carolina Central University, Durham, NC, USA. FAU - Kim, Susy AU - Kim S AD - Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, USA. FAU - Su, Yixin AU - Su Y AD - Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, USA. FAU - Kumar, Deepak AU - Kumar D AD - Julius L. Chambers Biomedical Biotechnology Research Institute, North Carolina Central University, Durham, NC, USA. FAU - Deep, Gagan AU - Deep G AD - Department of Cancer Biology, Wake Forest School of Medicine, Winston-Salem, NC, USA. gdeep@wakehealth.edu. AD - Department of Urology, Wake Forest School of Medicine, Winston-Salem, NC, USA. gdeep@wakehealth.edu. LA - eng GR - P30 CA012197/CA/NCI NIH HHS/United States GR - R01 MD012767/MD/NIMHD NIH HHS/United States GR - U54 MD012392/MD/NIMHD NIH HHS/United States GR - UL1 TR001420/TR/NCATS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 RN - 0 (Biomarkers, Tumor) RN - 0 (Nitroimidazoles) SB - IM MH - Biomarkers, Tumor/metabolism MH - Cell Hypoxia MH - Fluorescent Antibody Technique MH - Humans MH - Hypoxia MH - *Neoplasms MH - *Nitroimidazoles MH - Tumor Microenvironment PMC - PMC9116888 MID - NIHMS1799877 OTO - NOTNLM OT - Biomarker OT - Cancer OT - Hypoxia OT - Immunofluorescence OT - Pimonidazole EDAT- 2022/01/20 06:00 MHDA- 2022/03/31 06:00 PMCR- 2023/01/01 CRDT- 2022/01/19 12:34 PHST- 2022/01/19 12:34 [entrez] PHST- 2022/01/20 06:00 [pubmed] PHST- 2022/03/31 06:00 [medline] PHST- 2023/01/01 00:00 [pmc-release] AID - 10.1007/978-1-0716-1896-7_5 [doi] PST - ppublish SO - Methods Mol Biol. 2022;2413:37-43. doi: 10.1007/978-1-0716-1896-7_5.