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Zhu S, Wu L, Zhang M, Li S, Xing W, Zhao Z, Guo H, Ma L, Wu H. Collagen Peptides as a Hypoxia-Inducible Factor-2α-Stabilizing Prolyl Hydroxylase Inhibitor to Stimulate Intestinal Iron Absorption by Upregulating Iron Transport Proteins. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:15095-15103. [PMID: 36475394 DOI: 10.1021/acs.jafc.2c05411] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Iron intervention is not always safe and effective to correct iron deficiency. Host iron absorption stimulation is emerging as a promising adjunctive/alternative treatment. Here, porcine collagen hydrolysate (CH) and collagen-derived dipeptide prolyl-hydroxyproline, rather than collagen amino acids, namely, glycine, proline, and hydroxyproline, were found to increase cellular iron reduction, absorption, and transportation, to upregulate duodenal cytochrome b (Dcytb), divalent metal transporter 1 (DMT1), ferroportin (FPN), and hephaestin, and to nongenomically activate hypoxia-inducible factor-2α signaling in polarized Caco-2 cells. Prolyl-hydroxyproline showed both competitive and uncompetitive inhibition of recombinant human prolyl hydroxylase-3 activity with EC50 and Ki values of 10.62 and 6.73 μM, respectively. Docking simulations revealed collagen peptides as iron chelators and/or steric hindrances for prolyl hydroxylase-3. CH and prolyl-hydroxyproline acutely increased duodenal hypoxia-inducible factor-2α stability and Dcytb, DMT1, FPN, and hephaestin transcription in rats. Overall, collagen peptides act as a hypoxia-inducible factor-2α-stabilizing prolyl hydroxylase inhibitor to stimulate intestinal iron absorption.
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Affiliation(s)
- Suqin Zhu
- Institute of Nutrition and Health, School of Public Health, Qingdao University, 308 Ningxia Road, Qingdao 266021, China
- Qingdao Engineering Research Center for Preservation Technology of Marine Foods, College of Food Science and Engineering, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Lingyu Wu
- Qingdao Engineering Research Center for Preservation Technology of Marine Foods, College of Food Science and Engineering, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Meichao Zhang
- Weihai Institute for Food and Drug Control, Weihai 264299, China
| | - Shiyang Li
- Qingdao Engineering Research Center for Preservation Technology of Marine Foods, College of Food Science and Engineering, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Wenshuo Xing
- Qingdao Engineering Research Center for Preservation Technology of Marine Foods, College of Food Science and Engineering, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Zifang Zhao
- Haikou Research & Development Center for Biopeptide Engineering, Huayan Collagen Technology Co., Ltd., Haikou 571000, China
| | - Hongxing Guo
- Haikou Research & Development Center for Biopeptide Engineering, Huayan Collagen Technology Co., Ltd., Haikou 571000, China
| | - Lei Ma
- Qingdao Engineering Research Center for Preservation Technology of Marine Foods, College of Food Science and Engineering, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
| | - Haohao Wu
- Qingdao Engineering Research Center for Preservation Technology of Marine Foods, College of Food Science and Engineering, Ocean University of China, 5 Yushan Road, Qingdao 266003, China
- Haikou Research & Development Center for Biopeptide Engineering, Huayan Collagen Technology Co., Ltd., Haikou 571000, China
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Development of a colorimetric α-ketoglutarate detection assay for prolyl hydroxylase domain (PHD) proteins. J Biol Chem 2021; 296:100397. [PMID: 33571527 PMCID: PMC7961094 DOI: 10.1016/j.jbc.2021.100397] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 02/01/2021] [Accepted: 02/04/2021] [Indexed: 11/20/2022] Open
Abstract
Since the discovery of the prolyl hydroxylases domain (PHD) proteins and their canonical hypoxia-inducible factor (HIF) substrate two decades ago, a number of in vitro hydroxylation (IVH) assays for PHD activity have been developed to measure the PHD-HIF interaction. However, most of these assays either require complex proteomics mass spectrometry methods that rely on the specific PHD-HIF interaction or require the handling of radioactive material, as seen in the most commonly used assay measuring [14C]O2 release from labeled [14C]α-ketoglutarate. Here, we report an alternative rapid, cost-effective assay in which the consumption of α-ketoglutarate is monitored by its derivatization with 2,4-dinitrophenylhydrazine (2,4-DNPH) followed by treatment with concentrated base. We extensively optimized this 2,4-DNPH α-ketoglutarate assay to maximize the signal-to-noise ratio and demonstrated that it is robust enough to obtain kinetic parameters of the well-characterized PHD2 isoform comparable with those in published literature. We further showed that it is also sensitive enough to detect and measure the IC50 values of pan-PHD inhibitors and several PHD2 inhibitors in clinical trials for chronic kidney disease (CKD)-induced anemia. Given the efficiency of this assay coupled with its multiwell format, the 2,4-DNPH α-KG assay may be adaptable to explore non-HIF substrates of PHDs and potentially to high-throughput assays.
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Ma X, Wang X, Cao J, Geng Z, Wang Z. Effect of proline analogues on activity of human prolyl hydroxylase and the regulation of HIF signal transduction pathway. PLoS One 2014; 9:e95692. [PMID: 24755992 PMCID: PMC3995910 DOI: 10.1371/journal.pone.0095692] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Accepted: 03/29/2014] [Indexed: 12/16/2022] Open
Abstract
Hypoxia inducible factor 1 (HIF-1) plays a pivotal role in cellular responses to hypoxia. Prolyl hydroxylase 3 (PHD3) degrades HIF-1α under normoxic conditions through the hydroxylation of HIF-1α for proteolysis. Inhibiting PHD3 activity is crucial for up-regulating HIF-1α, thereby acting as a potential target for treating hypoxia-related diseases. In this study, two proline analogues (PA1 and PA2) were screened as PHD3 inhibitors with apparent EC50 values of 1.53 and 3.17 µM respectively, indicating good inhibition potency. Nine proteins, significantly regulated by PA1, were identified using 2-DE coupled with MALDI-TOF/TOF MS. Pyruvate kinase isozymes M1/M2 (PKM) and alpha-enolase 1 (ENO1), which are key modulators of glycolysis, are directly regulated by HIF-1α. Moreover, VEGF, a signal protein stimulating angiogenesis, was strongly promoted by PA1. Our findings suggest that PA1 stabilized HIF-1α as well as up-regulated glycolysis and angiogenesis proteins. Herein, for the first time, we systematically studied proline analogue PA1 as a PHD3 inhibitor, which provides innovative evidence for the treatment of HIF-related diseases.
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Affiliation(s)
- Xiaoyan Ma
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, PR China
| | - Xiaoxin Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, PR China
| | - Jing Cao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, PR China
| | - Zhirong Geng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, PR China
| | - Zhilin Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu, PR China
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Cao J, Ma X, Wang X, Wang X, Zhang Z, Geng Z, Wang Z. Azole derivatives as novel non-iron-chelating inhibitors of prolyl hydroxylase 3 for HIF-1 activation. MEDCHEMCOMM 2013. [DOI: 10.1039/c3md00117b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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