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Cheong KL, Yu B, Teng B, Veeraperumal S, Xu B, Zhong S, Tan K. Post-COVID-19 syndrome management: Utilizing the potential of dietary polysaccharides. Biomed Pharmacother 2023; 166:115320. [PMID: 37595427 DOI: 10.1016/j.biopha.2023.115320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/29/2023] [Accepted: 08/10/2023] [Indexed: 08/20/2023] Open
Abstract
The COVID-19 pandemic has caused significant global impact, resulting in long-term health effects for many individuals. As more patients recover, there is a growing need to identify effective management strategies for ongoing health concerns, such as post-COVID-19 syndrome, characterized by persistent symptoms or complications beyond several weeks or months from the onset of symptoms. In this review, we explore the potential of dietary polysaccharides as a promising approach to managing post-COVID-19 syndrome. We summarize the immunomodulatory, antioxidant, antiviral, and prebiotic activities of dietary polysaccharides for the management of post-COVID-19 syndrome. Furthermore, the review investigates the role of polysaccharides in enhancing immune response, regulating immune function, improving oxidative stress, inhibiting virus binding to ACE2, balancing gut microbiota, and increasing functional metabolites. These properties of dietary polysaccharides may help alleviate COVID-19 symptoms, providing a promising avenue for effective treatment strategies.
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Affiliation(s)
- Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Biao Yu
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
| | - Bo Teng
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
| | - Suresh Veeraperumal
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
| | - Baojun Xu
- Programme of Food Science and Technology, Department of Life Sciences, BNU-HKBU United International College, Zhuhai, China
| | - Saiyi Zhong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Karsoon Tan
- Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf University, Qinzhou 535011, Guangxi, China.
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Cheong KL, Chen S, Teng B, Veeraperumal S, Zhong S, Tan K. Oligosaccharides as Potential Regulators of Gut Microbiota and Intestinal Health in Post-COVID-19 Management. Pharmaceuticals (Basel) 2023; 16:860. [PMID: 37375807 DOI: 10.3390/ph16060860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/05/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
The COVID-19 pandemic has had a profound impact worldwide, resulting in long-term health effects for many individuals. Recently, as more and more people recover from COVID-19, there is an increasing need to identify effective management strategies for post-COVID-19 syndrome, which may include diarrhea, fatigue, and chronic inflammation. Oligosaccharides derived from natural resources have been shown to have prebiotic effects, and emerging evidence suggests that they may also have immunomodulatory and anti-inflammatory effects, which could be particularly relevant in mitigating the long-term effects of COVID-19. In this review, we explore the potential of oligosaccharides as regulators of gut microbiota and intestinal health in post-COVID-19 management. We discuss the complex interactions between the gut microbiota, their functional metabolites, such as short-chain fatty acids, and the immune system, highlighting the potential of oligosaccharides to improve gut health and manage post-COVID-19 syndrome. Furthermore, we review evidence of gut microbiota with angiotensin-converting enzyme 2 expression for alleviating post-COVID-19 syndrome. Therefore, oligosaccharides offer a safe, natural, and effective approach to potentially improving gut microbiota, intestinal health, and overall health outcomes in post-COVID-19 management.
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Affiliation(s)
- Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Shutong Chen
- Department of Biology, College of Science, Shantou University, Shantou 515063, China
| | - Bo Teng
- Department of Biology, College of Science, Shantou University, Shantou 515063, China
| | - Suresh Veeraperumal
- Department of Biology, College of Science, Shantou University, Shantou 515063, China
| | - Saiyi Zhong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Karsoon Tan
- Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf University, Qinzhou 535000, China
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Yu B, Wang M, Teng B, Veeraperumal S, Cheung PCK, Zhong S, Cheong KL. Partially Acid-Hydrolyzed Porphyran Improved Dextran Sulfate Sodium-Induced Acute Colitis by Modulation of Gut Microbiota and Enhancing the Mucosal Barrier. J Agric Food Chem 2023; 71:7299-7311. [PMID: 37132503 DOI: 10.1021/acs.jafc.2c08564] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The pharmacological values of marine algal polysaccharides on gut health are being recognized in recent research. However, the protective effect of degraded polysaccharides from Porphyra haitanensis (PHP-D) on the colonic mucosal barrier damaged in ulcerative colitis is poorly understood. The purpose of this study was to investigate how PHP-D could maintain the integrity of colonic mucosal layer mediated by microbiota in a dextran sulfate sodium (DSS)-induced colitis mouse model. Structural analysis revealed that PHP-D had a typical porphyran structure having a backbone of alternating (1 → 3)-linked β-d-galactopyranose units linked to either (1 → 4)-3,6-anhydro-α-l-galactopyranose units or (1 → 4)-linked α-l-galactose-6-sulfate units. An in vivo study demonstrated that PHP-D treatment reduced the severity of DSS-induced ulcerative colitis. 16S rRNA phylogenetic sequencing revealed that PHP-D affected the diversity of gut microbiota with an increase of Bacteroides, Muribaculum, and Lactobacillus species. Similarly, PHP-D increased levels of short-chain fatty acids. Furthermore, PHP-D restored mucus thickness and improved the expression of tight junction proteins. This work demonstrates that PHP-D is capable of enhancing a colonic mucosal barrier. These outcomes offer unique perspectives on the potential application of P. haitanensis as a promising natural product for the management of ulcerative colitis.
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Affiliation(s)
- Biao Yu
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
| | - Min Wang
- Postgraduate College, Guangdong Ocean University, Zhanjiang 524088, China
| | - Bo Teng
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
| | - Suresh Veeraperumal
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
| | - Peter Chi-Keung Cheung
- Food and Nutritional Sciences Program, School of Life Sciences, Chinese University of Hong Kong, Hong Kong 999077, China
| | - Saiyi Zhong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong, China
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Malairaj S, Veeraperumal S, Yao W, Subramanian M, Tan K, Zhong S, Cheong KL. Porphyran from Porphyra haitanensis Enhances Intestinal Barrier Function and Regulates Gut Microbiota Composition. Mar Drugs 2023; 21:md21050265. [PMID: 37233459 DOI: 10.3390/md21050265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 05/27/2023] Open
Abstract
In this study, the effects of a homogenous porphyran from Porphyra haitanensis (PHP) on the intestinal barrier and gut microbiota were investigated. The results showed that oral administration of PHP resulted in a higher luminal moisture content and a lower pH environment for the growth of beneficial bacteria in the colon of mice. PHP significantly increased the production of total short-chain fatty acids during the fermentation process. PHP made the intestinal epithelial cells of mice arrange more tidily and tightly with a significant increase in mucosal thickness. PHP also increased the amount of mucin-producing goblet cells and the expression of mucin in the colon, which maintained the structure and function of the intestinal mucosal barrier. Moreover, PHP up-regulated the expression of tight junctions including ZO-1 and occludin, improving the intestinal physical barrier function. The results of 16S rRNA sequencing showed that PHP regulated the composition of gut microbiota in mice, increasing the richness and diversity of gut microbiota and the ratio of Firmicutes to Bacteroidetes. This study revealed that the intake of PHP is beneficial for the gastrointestinal tract and PHP could be a potential source of prebiotics in the functional food and pharmaceutical industries.
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Affiliation(s)
- Sathuvan Malairaj
- Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
- Department of Biology, College of Science, Shantou University, Shantou 515063, China
| | - Suresh Veeraperumal
- Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Wanzi Yao
- Department of Biology, College of Science, Shantou University, Shantou 515063, China
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Mugesh Subramanian
- Research and Development Center, Genexia Bioserv, Chennai 600045, Tamilnadu, India
| | - Karsoon Tan
- Guangxi Key Laboratory of Beibu Gulf Biodiversity Conservation, Beibu Gulf University, Qinzhou 535011, China
| | - Saiyi Zhong
- Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
| | - Kit-Leong Cheong
- Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
- Department of Biology, College of Science, Shantou University, Shantou 515063, China
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Wang M, Veeraperumal S, Zhong S, Cheong KL. Fucoidan-Derived Functional Oligosaccharides: Recent Developments, Preparation, and Potential Applications. Foods 2023; 12:foods12040878. [PMID: 36832953 PMCID: PMC9956988 DOI: 10.3390/foods12040878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 02/22/2023] Open
Abstract
Oligosaccharides derived from natural resources are attracting increasing attention as both food and nutraceutical products because of their beneficial health effects and lack of toxicity. During the past few decades, many studies have focused on the potential health benefits of fucoidan. Recently, new interest has emerged in fucoidan, partially hydrolysed into fuco-oligosaccharides (FOSs) or low-molecular weight fucoidan, owing to their superior solubility and biological activities compared with fucoidan. There is considerable interest in their development for use in the functional food, cosmetic, and pharmaceutical industries. Therefore, this review summarises and discusses the preparation of FOSs from fucoidan using mild acid hydrolysis, enzymatic depolymerisation, and radical degradation methods, and discusses the advantages and disadvantages of hydrolysis methods. Several purification steps performed to obtain FOSs (according to the latest reports) are also reviewed. Moreover, the biological activities of FOS that are beneficial to human health are summarised based on evidence from in vitro and in vivo studies, and the possible mechanisms for the prevention or treatment of various diseases are discussed.
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Affiliation(s)
- Min Wang
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
- Postgraduate College, Guangdong Ocean University, Zhanjiang 524088, China
| | | | - Saiyi Zhong
- Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, Guangdong Province Engineering Laboratory for Marine Biological Products, Guangdong Provincial Engineering Technology Research Center of Seafood, Guangdong Provincial Science and Technology Innovation Center for Subtropical Fruit and Vegetable Processing, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China
- Correspondence: (S.Z.); (K.-L.C.)
| | - Kit-Leong Cheong
- Department of Biology, Shantou University, Shantou 515063, China
- Correspondence: (S.Z.); (K.-L.C.)
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Veeraperumal S, Qiu HM, Tan CS, Ng ST, Zhang W, Tang S, Cheong KL, Liu Y. Restitution of epithelial cells during intestinal mucosal wound healing: The effect of a polysaccharide from the sclerotium of Lignosus rhinocerotis (Cooke) Ryvarden. J Ethnopharmacol 2021; 274:114024. [PMID: 33727110 DOI: 10.1016/j.jep.2021.114024] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 01/09/2021] [Accepted: 03/09/2021] [Indexed: 02/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Lignosus rhinocerotis (Cooke) Ryvarden cultivar TM02, also known as tiger's milk mushroom, is regarded as important folk medicine in Malaysia, while is used for the treatment of liver cancer, chronic hepatitis, gastric ulcer in traditional Chinese medicine. However, there is no compilation of scientific evidence that its protection for gastric, and no attempts have been made to understand how polysaccharides in Lignosus rhinocerotis might promote intestinal mucosal wound healing. AIM OF THE STUDY This study aimed to investigate the effect and mechanism of β-glucan prepared from L. rhinocerotis using an enzymatic method on epithelial restitution during intestinal mucosal damage. MATERIALS AND METHODS Based on FT-IR, MALDI-TOF-MS, HPSEC-MALLS-RID, and AFM, the structure of polysaccharides from L. rhinocerotis was analysed. In addition, polysaccharides were used to test for wound healing activity in IEC-6 cells by measuring cell migration, proliferation, and expression of cell division control protein 42, Rac-1, RhoA, and Par-3. RESULTS β-glucan was extracted using enzyme-assisted extraction, and a yield of approximately 8.5 ± 0.8% was obtained from the dried biomass. The β-glucan extracted by enzyme-assisted extraction (EAE) of polysaccharides was composed entirely of D-glucose with a total carbohydrate content of 95.5 ± 3.2%. The results of HPLC, FTIR, and MALDI-TOF-MS analyses revealed EAEP to be confirmed as β-glucan. The molecular weight of prepared β-glucan was found to be 5.315 × 104 g/mol by HPSEC-MALLS-RID. Furthermore, mucosal wound healing studies showed that the treatment of IEC-6 with a β-glucan concentration of 200 μg/mL promoted cell migration and proliferation, and it enhanced the protein expression of cell division control protein 42, Rac-1, RhoA, and Par-3. CONCLUSIONS The present study reveals that the prepared β-glucan accelerates intestinal epithelial cell proliferation and migration via activation of Rho-dependent pathway. Hence, β-glucan can be employed as a prospective therapeutic agent for the treatment of diseases associated with gastrointestinal mucosal damage, such as peptic ulcers and inflammatory bowel disease.
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Affiliation(s)
- Suresh Veeraperumal
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China
| | - Hua-Mai Qiu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China
| | - Chon-Seng Tan
- Biotechnology Research Centre, MARDI, P.O.Box 12301, 50744, Kuala Lumpur, Malaysia
| | - Szu-Ting Ng
- Ligno Biotech Sdn Bhd, Taman Perindustrian Balakong Jaya 2, Selangor, 43300, Balakong Jaya, Malaysia
| | - Wancong Zhang
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China
| | - Shijie Tang
- Department of Plastic Surgery and Burn Center, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong, China.
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China.
| | - Yang Liu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Department of Biology, College of Science, Shantou University, Shantou, 515063, Guangdong, PR China.
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Yao WZ, Veeraperumal S, Qiu HM, Chen XQ, Cheong KL. Anti-cancer effects of Porphyra haitanensis polysaccharides on human colon cancer cells via cell cycle arrest and apoptosis without causing adverse effects in vitro. 3 Biotech 2020; 10:386. [PMID: 32832336 PMCID: PMC7419411 DOI: 10.1007/s13205-020-02379-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 08/04/2020] [Indexed: 12/15/2022] Open
Abstract
In this study, the anticancer effects of Porphyra haitanensis polysaccharides (PHPs) on human colon cancer cells and non-cancerous cells were evaluated. PHP was extracted by an ultrasonic/microwave-assisted method, and three fractions of polysaccharides (PHP-F1, PHP-F2 and PHP-F3) were obtained through a DEAE-52 cellulose ion-exchange column. The results of the cytotoxicity test showed that all of the PHP fractions had inhibitory effects on the growth of colon cancer cells HT-29, LoVo and SW-480, but no toxic effects on the normal human cells HaCaT. The fractions PHP-F2 and PHP-F3 had the most significant cytotoxicity on HT-29 cells. Studies on intracellular reactive oxygen species (ROS) levels, cell apoptosis, the apoptosis index (using Hoechst 33342 staining) and analysis of cell cycle arrest using flow cytometry revealed that the fractions PHP-F2 and PHP-F3 could apparently induce oxidative stress and apoptosis in HT-29 cells and cause cell G0-G1 phase arrest. These findings suggest that polysaccharides from P. haitanensis have anticancer effects on human colon cancer cells and therefore might be regarded as new candidates for the prevention and treatment of colon cancers.
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Affiliation(s)
- Wan-Zi Yao
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Institute of Marine Sciences, Shantou University, Shantou, 515063 Guangdong People’s Republic of China
| | - Suresh Veeraperumal
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Institute of Marine Sciences, Shantou University, Shantou, 515063 Guangdong People’s Republic of China
| | - Hua-Mai Qiu
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Institute of Marine Sciences, Shantou University, Shantou, 515063 Guangdong People’s Republic of China
| | - Xian-Qiang Chen
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, Nanning, 530200 Guangxi China
| | - Kit-Leong Cheong
- Guangdong Provincial Key Laboratory of Marine Biotechnology, STU-UNIVPM Joint Algal Research Center, Institute of Marine Sciences, Shantou University, Shantou, 515063 Guangdong People’s Republic of China
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Leftin A, Veeraperumal S, Zhao H, Budhu S, Stanchina ED, Wolchok J, Merghoub T, Koutcher J. Abstract 874: Lifting the iron curtain: Imaging cellular barriers to combination chelation-immune checkpoint therapy. Cancer Res 2017. [DOI: 10.1158/1538-7445.am2017-874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Iron accumulation in cancer cells and macrophages can result in a tumor microenvironment that is unfavorable for checkpoint immune therapy. Chelation is a safe approach of reducing cellular iron accumulation that while affecting all cells biochemically, has been shown to also regulate tumor growth via specific “off-label” effects on macrophages that can hypothetically support an immune therapy responsive microenvironment. To further investigate the connection between infiltration of macrophages, iron chelation therapy, and synergy with immune therapy, we used established orthotopic Myc-CaP and TRAMP-C2 prostate cancer models and quantitative iron and cellular MRI, histology, and FACS to evaluate pre-treatment and post-chelation macrophage/immunological status, and MRI to monitor tumor growth. Quantitative assessment of cellular iron from MRI and histology of tumors, livers, and spleens revealed differences in tissue iron levels between host mouse strains, and enabled us to correlate these differences with extent of iron-macrophage infiltration in the tissues. To see if we could reduce these cells metabolically we administered the oral chelator deferiprone at tumor onset which resulted in reductions in endpoint tumor volume in both prostate tumor models with the largest response to chelation being observed in low-iron C57BL6 model backgrounds; a result subsequently confirmed in MMTV-PyMT orthotopic breast cancer models. Even in cases of complete tumor growth inhibition, systemic iron-load was not significantly affected, indicating that chelation achieved these therapeutic gains without harmful side-effects. Reduction of iron-macrophages and tumor volume accompanied shifts in macrophage surface receptor presentation and T-cell repertoire indicating that pro-tumor (M2) macrophage de-polarization to anti-tumor (M1) phenotypes occurred with chelation therapy. As these changes can potentially support improved action of checkpoint PDL-1 inhibitors, we then tested the combination chelation-checkpoint therapy approach in the prostate tumor models. These trials showed a modest reduction in tumor growth with either chelation or immune checkpoint therapy alone. A notable synergistic effect was observed using combination chelation-checkpoint therapy that accompanied a shift in macrophage polarization suggesting that chelation was sufficient to enhance checkpoint response. These therapeutic imaging studies demonstrate how tumor infiltration of iron-macrophages can be used as a biomarker of the immune-microenvironment, and how by using iron-chelation immunotherapeutic response can be enhanced.
Citation Format: Avigdor Leftin, Suresh Veeraperumal, Huiyong Zhao, Sadna Budhu, Elisa de Stanchina, Jedd Wolchok, Taha Merghoub, Jason Koutcher. Lifting the iron curtain: Imaging cellular barriers to combination chelation-immune checkpoint therapy [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 874. doi:10.1158/1538-7445.AM2017-874
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Affiliation(s)
| | | | - Huiyong Zhao
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - Sadna Budhu
- Memorial Sloan Kettering Cancer Center, New York, NY
| | | | - Jedd Wolchok
- Memorial Sloan Kettering Cancer Center, New York, NY
| | - Taha Merghoub
- Memorial Sloan Kettering Cancer Center, New York, NY
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Simões RV, Veeraperumal S, Serganova IS, Kruchevsky N, Varshavsky J, Blasberg RG, Ackerstaff E, Koutcher JA. Inhibition of prostate cancer proliferation by Deferiprone. NMR Biomed 2017; 30:10.1002/nbm.3712. [PMID: 28272795 PMCID: PMC5505495 DOI: 10.1002/nbm.3712] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 01/20/2017] [Accepted: 01/20/2017] [Indexed: 05/22/2023]
Abstract
Cancer growth and proliferation rely on intracellular iron availability. We studied the effects of Deferiprone (DFP), a chelator of intracellular iron, on three prostate cancer cell lines: murine, metastatic TRAMP-C2; murine, non-metastatic Myc-CaP; and human, non-metastatic 22rv1. The effects of DFP were evaluated at different cellular levels: cell culture proliferation and migration; metabolism of live cells (time-course multi-nuclear magnetic resonance spectroscopy cell perfusion studies, with 1-13 C-glucose, and extracellular flux analysis); and expression (Western blot) and activity of mitochondrial aconitase, an iron-dependent enzyme. The 50% and 90% inhibitory concentrations (IC50 and IC90 , respectively) of DFP for the three cell lines after 48 h of incubation were within the ranges 51-67 μM and 81-186 μM, respectively. Exposure to 100 μM DFP led to: (i) significant inhibition of cell migration after different exposure times, ranging from 12 h (TRAMP-C2) to 48 h (22rv1), in agreement with the respective cell doubling times; (ii) significantly decreased glucose consumption and glucose-driven tricarboxylic acid cycle activity in metastatic TRAMP-C2 cells, during the first 10 h of exposure, and impaired cellular bioenergetics and membrane phospholipid turnover after 23 h of exposure, consistent with a cytostatic effect of DFP. At this time point, all cell lines studied showed: (iii) significant decreases in mitochondrial functional parameters associated with the oxygen consumption rate, and (iv) significantly lower mitochondrial aconitase expression and activity. Our results indicate the potential of DFP to inhibit prostate cancer proliferation at clinically relevant doses and plasma concentrations.
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Affiliation(s)
- Rui V. Simões
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center
| | | | | | | | - Joseph Varshavsky
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center
| | - Ronald G. Blasberg
- Department of Neurology, Memorial Sloan Kettering Cancer Center
- Department of Medicine, Memorial Sloan Kettering Cancer Center
- Molecular Pharmacology and Chemistry Program, Memorial Sloan Kettering Cancer Center
| | - Ellen Ackerstaff
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center
| | - Jason A. Koutcher
- Department of Medical Physics, Memorial Sloan Kettering Cancer Center
- Department of Radiology, Memorial Sloan Kettering Cancer Center
- Department of Medicine, Memorial Sloan Kettering Cancer Center
- Molecular Pharmacology and Chemistry Program, Memorial Sloan Kettering Cancer Center
- Weill Cornell Medical College, Cornell University. New York, NY 10065, USA
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