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Elkholy A, Avuthu N, Abdalla M, Behring M, Bajpai P, Kim HG, Header D, Abo Elwafa RAH, Saed H, Embaby A, El-Nikhely N, Obuya S, Mohamed M, Badawy AA, Nawar A, Afaq F, Rogers LQ, Bae S, Shikany JM, Bateman LB, Fouad M, Saleh M, Samuel T, Varambally S, Guda C, Arafat W, Manne U. Microbiome diversity in African American, European American, and Egyptian colorectal cancer patients. Heliyon 2023; 9:e18035. [PMID: 37483698 PMCID: PMC10362239 DOI: 10.1016/j.heliyon.2023.e18035] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 06/23/2023] [Accepted: 07/05/2023] [Indexed: 07/25/2023] Open
Abstract
Purpose Although there is an established role for microbiome dysbiosis in the pathobiology of colorectal cancer (CRC), CRC patients of various race/ethnicities demonstrate distinct clinical behaviors. Thus, we investigated microbiome dysbiosis in Egyptian, African American (AA), and European American (EA) CRC patients. Patients and methods CRCs and their corresponding normal tissues from Egyptian (n = 17) patients of the Alexandria University Hospital, Egypt, and tissues from AA (n = 18) and EA (n = 19) patients at the University of Alabama at Birmingham were collected. DNA was isolated from frozen tissues, and the microbiome composition was analyzed by 16S rRNA sequencing. Differential microbial abundance, diversity, and metabolic pathways were identified using linear discriminant analysis (LDA) effect size analyses. Additionally, we compared these profiles with our previously published microbiome data derived from Kenyan CRC patients. Results Differential microbiome analysis of CRCs across all racial/ethnic groups showed dysbiosis. There were high abundances of Herbaspirillum and Staphylococcus in CRCs of Egyptians, Leptotrichia in CRCs of AAs, Flexspiria and Streptococcus in CRCs of EAs, and Akkermansia muciniphila and Prevotella nigrescens in CRCs of Kenyans (LDA score >4, adj. p-value <0.05). Functional analyses showed distinct microbial metabolic pathways in CRCs compared to normal tissues within the racial/ethnic groups. Egyptian CRCs, compared to normal tissues, showed lower l-methionine biosynthesis and higher galactose degradation pathways. Conclusions Our findings showed altered mucosa-associated microbiome profiles of CRCs and their metabolic pathways across racial/ethnic groups. These findings provide a basis for future studies to link racial/ethnic microbiome differences with distinct clinical behaviors in CRC.
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Affiliation(s)
- Amr Elkholy
- Department of Pathology, University of Alabama at Birmingham, AL, USA
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Nagavardhini Avuthu
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA
| | - Mohammed Abdalla
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Michael Behring
- Department of Pathology, University of Alabama at Birmingham, AL, USA
| | - Prachi Bajpai
- Department of Pathology, University of Alabama at Birmingham, AL, USA
| | - Hyung-Gyoon Kim
- Department of Pathology, University of Alabama at Birmingham, AL, USA
| | - Doaa Header
- Department of Gastroenterology, Faculty of Medicine, University of Alexandria, Egypt
| | - Reham AH. Abo Elwafa
- Department of Clinical Pathology, Faculty of Medicine, University of Alexandria, Egypt
| | - Hesham Saed
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Amira Embaby
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Nefertiti El-Nikhely
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Sarah Obuya
- Moi Teaching and Referral Hospital, Moi University, Kesses, Kenya
| | - Mostafa Mohamed
- Department of Pathology, University of Alabama at Birmingham, AL, USA
- Department of Biotechnology, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Ahmed Ashour Badawy
- Department of Clinical Oncology and Nuclear Medicine, Faculty of Medicine, University of Alexandria, Egypt
| | - Ahmed Nawar
- Department of Clinical Oncology and Nuclear Medicine, Faculty of Medicine, University of Alexandria, Egypt
| | - Farrukh Afaq
- Department of Pathology, University of Alabama at Birmingham, AL, USA
| | - Laura Q. Rogers
- Division of Preventive Medicine, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Sejong Bae
- Division of Preventive Medicine, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - James M. Shikany
- Division of Preventive Medicine, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Lori Brand Bateman
- Division of Preventive Medicine, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mona Fouad
- Division of Preventive Medicine, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Mansoor Saleh
- Department of Hematology-Oncology, Aga Khan University, Nairobi, Kenya
| | - Temesgen Samuel
- Tuskegee University College of Veterinary Medicine Tuskegee, AL, USA
| | - Sooryanarayana Varambally
- Department of Pathology, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Chittibabu Guda
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE, USA
| | - Waleed Arafat
- Department of Clinical Oncology and Nuclear Medicine, Faculty of Medicine, University of Alexandria, Egypt
| | - Upender Manne
- Department of Pathology, University of Alabama at Birmingham, AL, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
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