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Hahn AW, Menk AV, Rivadeneira DB, Augustin RC, Xu M, Li J, Wu X, Mishra AK, Gide TN, Quek C, Zang Y, Spencer CN, Menzies AM, Daniel CR, Hudgens CW, Nowicki T, Haydu LE, Khan MAW, Gopalakrishnan V, Burton EM, Malke J, Simon JM, Bernatchez C, Putluri N, Woodman SE, Vashisht Gopal YN, Guerrieri R, Fischer GM, Wang J, Wani KM, Thompson JF, Lee JE, Hwu P, Ajami N, Gershenwald JE, Long GV, Scolyer RA, Tetzlaff MT, Lazar AJ, Schadendorf D, Wargo JA, Kirkwood JM, DeBerardinis RJ, Liang H, Futreal A, Zhang J, Wilmott JS, Peng W, Davies MA, Delgoffe GM, Najjar YG, McQuade JL. Obesity Is Associated with Altered Tumor Metabolism in Metastatic Melanoma. Clin Cancer Res 2023; 29:154-164. [PMID: 36166093 DOI: 10.1158/1078-0432.ccr-22-2661] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 09/14/2022] [Accepted: 09/22/2022] [Indexed: 02/06/2023]
Abstract
PURPOSE Overweight/obese (OW/OB) patients with metastatic melanoma unexpectedly have improved outcomes with immune checkpoint inhibitors (ICI) and BRAF-targeted therapies. The mechanism(s) underlying this association remain unclear, thus we assessed the integrated molecular, metabolic, and immune profile of tumors, as well as gut microbiome features, for associations with patient body mass index (BMI). EXPERIMENTAL DESIGN Associations between BMI [normal (NL < 25) or OW/OB (BMI ≥ 25)] and tumor or microbiome characteristics were examined in specimens from 782 patients with metastatic melanoma across 7 cohorts. DNA associations were evaluated in The Cancer Genome Atlas cohort. RNA sequencing from 4 cohorts (n = 357) was batch corrected and gene set enrichment analysis (GSEA) by BMI category was performed. Metabolic profiling was conducted in a subset of patients (x = 36) by LC/MS, and in flow-sorted melanoma tumor cells (x = 37) and patient-derived melanoma cell lines (x = 17) using the Seahorse XF assay. Gut microbiome features were examined in an independent cohort (n = 371). RESULTS DNA mutations and copy number variations were not associated with BMI. GSEA demonstrated that tumors from OW/OB patients were metabolically quiescent, with downregulation of oxidative phosphorylation and multiple other metabolic pathways. Direct metabolite analysis and functional metabolic profiling confirmed decreased central carbon metabolism in OW/OB metastatic melanoma tumors and patient-derived cell lines. The overall structure, diversity, and taxonomy of the fecal microbiome did not differ by BMI. CONCLUSIONS These findings suggest that the host metabolic phenotype influences melanoma metabolism and provide insight into the improved outcomes observed in OW/OB patients with metastatic melanoma treated with ICIs and targeted therapies. See related commentary by Smalley, p. 5.
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Affiliation(s)
- Andrew W Hahn
- Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Ashley V Menk
- Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | | | - Ryan C Augustin
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Mingchu Xu
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jun Li
- Department of Bioinformatics and Computational Biology, Division of Basic Sciences, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Xiaogang Wu
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Aditya K Mishra
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Tuba N Gide
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia
| | - Camelia Quek
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia
| | - Yan Zang
- Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | | | - Alexander M Menzies
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia
| | - Carrie R Daniel
- Department of Epidemiology, Division of Cancer Prevention and Population Sciences, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Courtney W Hudgens
- Department of Translational Molecular Pathology, Division of Pathology and Laboratory Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Theodore Nowicki
- Division of Pediatric Hematology-Oncology, Department of Pediatrics, University of California Los Angeles, Los Angeles, California.,Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, California.,Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, California
| | - Lauren E Haydu
- Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - M A Wadud Khan
- Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Vancheswaran Gopalakrishnan
- Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Elizabeth M Burton
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jared Malke
- Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Julie M Simon
- Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Chantale Bernatchez
- Department of Biologics Development, Division of Therapeutics Discovery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Nagireddy Putluri
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas
| | - Scott E Woodman
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Y N Vashisht Gopal
- Department of Melanoma Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Renato Guerrieri
- Department of Melanoma Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Grant M Fischer
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts
| | - Jian Wang
- Department of Biostatistics, Division of Biosciences, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Khalida M Wani
- Department of Translational Molecular Pathology, Division of Pathology and Laboratory Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - John F Thompson
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia
| | - Jeffrey E Lee
- Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Patrick Hwu
- Department of Cutaneous Oncology, Moffitt Cancer Center, Tampa Bay, Florida
| | - Nadim Ajami
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jeffrey E Gershenwald
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, University of California Los Angeles, Los Angeles, California
| | - Georgina V Long
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia.,Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.,Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Richard A Scolyer
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia.,Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia.,Charles Perkins Centre, The University of Sydney, Sydney, New South Wales, Australia.,Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital and NSW Health Pathology, Sydney, New South Wales, Australia
| | - Michael T Tetzlaff
- Division of Dermatopathology, Department of Pathology, University of California San Francisco, San Francisco, California
| | - Alexander J Lazar
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas.,Department of Translational Molecular Pathology, Division of Pathology and Laboratory Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Dirk Schadendorf
- Department of Dermatology, Venereology, and Allergology, University Hospital Essen and German Cancer Consortium, Partner site Essen, Germany
| | - Jennifer A Wargo
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas.,Department of Surgical Oncology, Division of Surgery, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - John M Kirkwood
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Ralph J DeBerardinis
- Children's Medical Research Institute and Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Han Liang
- Department of Bioinformatics and Computational Biology, Division of Basic Sciences, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Andrew Futreal
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jianhua Zhang
- Department of Genomic Medicine, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - James S Wilmott
- Melanoma Institute of Australia, The University of Sydney, Sydney, New South Wales, Australia
| | - Weiyi Peng
- Department of Biology and Biochemistry, University of Houston, Houston, Texas
| | - Michael A Davies
- Department of Melanoma Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Greg M Delgoffe
- Department of Immunology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Yana G Najjar
- Division of Hematology/Oncology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Jennifer L McQuade
- Department of Melanoma Medical Oncology, Division of Cancer Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas
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2
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Vellano CP, White MG, Andrews MC, Chelvanambi M, Witt RG, Daniele JR, Titus M, McQuade JL, Conforti F, Burton EM, Lastrapes MJ, Ologun G, Cogdill AP, Morad G, Prieto P, Lazar AJ, Chu Y, Han G, Khan MAW, Helmink B, Davies MA, Amaria RN, Kovacs JJ, Woodman SE, Patel S, Hwu P, Peoples M, Lee JE, Cooper ZA, Zhu H, Gao G, Banerjee H, Lau M, Gershenwald JE, Lucci A, Keung EZ, Ross MI, Pala L, Pagan E, Segura RL, Liu Q, Borthwick MS, Lau E, Yates MS, Westin SN, Wani K, Tetzlaff MT, Haydu LE, Mahendra M, Ma X, Logothetis C, Kulstad Z, Johnson S, Hudgens CW, Feng N, Federico L, Long GV, Futreal PA, Arur S, Tawbi HA, Moran AE, Wang L, Heffernan TP, Marszalek JR, Wargo JA. Androgen receptor blockade promotes response to BRAF/MEK-targeted therapy. Nature 2022; 606:797-803. [PMID: 35705814 PMCID: PMC10071594 DOI: 10.1038/s41586-022-04833-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 05/05/2022] [Indexed: 01/27/2023]
Abstract
Treatment with therapy targeting BRAF and MEK (BRAF/MEK) has revolutionized care in melanoma and other cancers; however, therapeutic resistance is common and innovative treatment strategies are needed1,2. Here we studied a group of patients with melanoma who were treated with neoadjuvant BRAF/MEK-targeted therapy ( NCT02231775 , n = 51) and observed significantly higher rates of major pathological response (MPR; ≤10% viable tumour at resection) and improved recurrence-free survival (RFS) in female versus male patients (MPR, 66% versus 14%, P = 0.001; RFS, 64% versus 32% at 2 years, P = 0.021). The findings were validated in several additional cohorts2-4 of patients with unresectable metastatic melanoma who were treated with BRAF- and/or MEK-targeted therapy (n = 664 patients in total), demonstrating improved progression-free survival and overall survival in female versus male patients in several of these studies. Studies in preclinical models demonstrated significantly impaired anti-tumour activity in male versus female mice after BRAF/MEK-targeted therapy (P = 0.006), with significantly higher expression of the androgen receptor in tumours of male and female BRAF/MEK-treated mice versus the control (P = 0.0006 and P = 0.0025). Pharmacological inhibition of androgen receptor signalling improved responses to BRAF/MEK-targeted therapy in male and female mice (P = 0.018 and P = 0.003), whereas induction of androgen receptor signalling (through testosterone administration) was associated with a significantly impaired response to BRAF/MEK-targeted therapy in male and female patients (P = 0.021 and P < 0.0001). Together, these results have important implications for therapy.
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Affiliation(s)
- Christopher P Vellano
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Michael G White
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Miles C Andrews
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Medicine, Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Manoj Chelvanambi
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Russell G Witt
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Joseph R Daniele
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Mark Titus
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jennifer L McQuade
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Fabio Conforti
- Division of Melanoma, Sarcomas, and Rare Tumors, European Institute of Oncology, IRCCS, Milan, Italy
| | - Elizabeth M Burton
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Matthew J Lastrapes
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Gabriel Ologun
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Surgery, Guthrie Courtland Medical Center, Courtland, NY, USA
| | - Alexandria P Cogdill
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Immunai, New York, NY, USA
| | - Golnaz Morad
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Peter Prieto
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Surgery, University of Rochester, Rochester, NY, USA
| | - Alexander J Lazar
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yanshuo Chu
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Guangchun Han
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M A Wadud Khan
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Beth Helmink
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Surgery, Washington University in St Louis, St Louis, MO, USA
| | - Michael A Davies
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Rodabe N Amaria
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jeffrey J Kovacs
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Scott E Woodman
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sapna Patel
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Patrick Hwu
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Moffitt Cancer Center, Tampa, FL, USA
| | - Michael Peoples
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jeffrey E Lee
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Zachary A Cooper
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,AstraZeneca, Gaithersburg, MD, USA
| | - Haifeng Zhu
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Guang Gao
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hiya Banerjee
- Clinical Development and Analytics, Novartis Pharmaceuticals, East Hanover, NJ, USA
| | - Mike Lau
- Novartis Pharma, Basel, Switzerland
| | - Jeffrey E Gershenwald
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Anthony Lucci
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Emily Z Keung
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Merrick I Ross
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Laura Pala
- Division of Melanoma, Sarcomas, and Rare Tumors, European Institute of Oncology, IRCCS, Milan, Italy
| | - Eleonora Pagan
- Department of Statistics and Quantitative Methods, University of Milan-Bicocca, Milan, Italy
| | - Rossana Lazcano Segura
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Qian Liu
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Mikayla S Borthwick
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Eric Lau
- Department of Tumor Biology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Melinda S Yates
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Shannon N Westin
- Department of Gynecologic Oncology and Reproductive Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Khalida Wani
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Michael T Tetzlaff
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.,Department of Pathology, University of California, San Francisco, CA, USA
| | - Lauren E Haydu
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Mikhila Mahendra
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - XiaoYan Ma
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Christopher Logothetis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Zachary Kulstad
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Sarah Johnson
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Courtney W Hudgens
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ningping Feng
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Lorenzo Federico
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Georgina V Long
- Melanoma Institute Australia, The University of Sydney, and Royal North Shore and Mater Hospitals, Sydney, New South Wales, Australia
| | - P Andrew Futreal
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Swathi Arur
- Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Hussein A Tawbi
- Department of Melanoma Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Amy E Moran
- Cell, Development & Cancer Biology, Knight Cancer Institute, Oregon Health & Science University, Portland, OR, USA
| | - Linghua Wang
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Timothy P Heffernan
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
| | - Joseph R Marszalek
- TRACTION Platform, Therapeutics Discovery Division, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
| | - Jennifer A Wargo
- Department of Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. .,Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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3
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Khan MAW, Bohannan BJM, Nüsslein K, Tiedje JM, Tringe SG, Parlade E, Barberán A, Rodrigues JLM. Deforestation impacts network co-occurrence patterns of microbial communities in Amazon soils. FEMS Microbiol Ecol 2019; 95:5211045. [PMID: 30481288 PMCID: PMC6294608 DOI: 10.1093/femsec/fiy230] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 11/26/2018] [Indexed: 01/28/2023] Open
Abstract
Co-occurrence networks allow for the identification of potential associations among species, which may be important for understanding community assembly and ecosystem functions. We employed this strategy to examine prokaryotic co-occurrence patterns in the Amazon soils and the response of these patterns to land use change to pasture, with the hypothesis that altered microbial composition due to deforestation will mirror the co-occurrence patterns across prokaryotic taxa. In this study, we calculated Spearman correlations between operational taxonomic units (OTUs) as determined by 16S rRNA gene sequencing, and only robust correlations were considered for network construction (-0.80 ≥ P ≥ 0.80, adjusted P < 0.01). The constructed network represents distinct forest and pasture components, with altered compositional and topological features. A comparative analysis between two representative modules of these contrasting ecosystems revealed novel information regarding changes to metabolic pathways related to nitrogen cycling. Our results showed that soil physicochemical properties such as temperature, C/N and H++Al3+ had a significant impact on prokaryotic communities, with alterations to network topologies. Taken together, changes in co-occurrence patterns and physicochemical properties may contribute to ecosystem processes including nitrification and denitrification, two important biogeochemical processes occurring in tropical forest systems.
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Affiliation(s)
- M A Wadud Khan
- Department of Biology, University of Texas, Arlington, TX 76019, USA
| | | | - Klaus Nüsslein
- Department of Microbiology, University of Massachusetts, Amherst, MA 01003, USA
| | - James M Tiedje
- Center for Microbial Ecology, Michigan State University, East Lansing, MI 48824, USA
| | - Susannah G Tringe
- Joint Genome Institute, United States Department of Energy, Walnut Creek, CA 94598, USA.,Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Eloi Parlade
- Department of Land, Air and Water Resources, University of California - Davis, Davis, CA 95616, USA
| | - Albert Barberán
- Department of Soil, Water and Environmental Science, University of Arizona, Tucson, AZ 85721, USA
| | - Jorge L M Rodrigues
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.,Department of Land, Air and Water Resources, University of California - Davis, Davis, CA 95616, USA
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