Abstract
Nearly all patients with systemic sclerosis (SSc) are negatively affected by dysfunction in the gastrointestinal tract, and the severity of gastrointestinal disease in SSc correlates with high mortality. The clinical complications of this dysfunction are heterogeneous and include gastro-oesophageal reflux disease, gastroparesis, small intestinal bacterial overgrowth, intestinal pseudo-obstruction, malabsorption and the requirement for total parenteral nutrition. The abnormal gastrointestinal physiology that promotes the clinical manifestations of SSc gastrointestinal disease throughout the gastrointestinal tract are diverse and present a range of therapeutic targets. Furthermore, the armamentarium of medications and non-pharmacological interventions that can benefit affected patients has substantially expanded in the past 10 years, and research is increasingly focused in this area. Here, we review the details of the gastrointestinal complications in SSc, tie physiological abnormalities to clinical manifestations, detail the roles of standard and novel therapies and lay a foundation for future investigative work.
Key points
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Gastrointestinal disease in systemic sclerosis (SSc) is complex in its clinical presentation, physiology and mechanisms.
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Data suggest that the neuromuscular pathways that control gastrointestinal motility are dysfunctional in SSc and are a target of the autoimmune response in some patients.
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Identifying the part or parts of the gut affected and the type of gastrointestinal abnormality that is present can help to guide therapy.
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The microbiome is probably an important contributor to gastrointestinal symptoms in SSc, although the extent of its involvement and the role of dysbiosis in diagnosis and guiding therapy are unclear.
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Research is underway to better understand the mechanisms of gastrointestinal disease in SSc, and to optimize the approach to management.
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Change history
15 February 2023
A Correction to this paper has been published: https://doi.org/10.1038/s41584-023-00929-1
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Z.H.M.’s work is supported by funding from NIH/NIAMS K23 AR071473. D.K.’s work is supported by funding from K24 ARAR063120.
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J.C. declares that she is a consultant for Phathom Pharmaceuticals. R.J.X. declares that he is co-founder of Jnana Therapeutics and Celsius Therapeutics, a board member for Moonlake Immunotherapeutics and on the Scientific Advisory Board for Nestle. P.J.P. declares that he is co-founder of, holds equity in and is a consultant for Neurogastrx. D.K. declares that he has received consulting fees from Acceleron, Actelion, Amgen, Bayer, Boehringer Ingelheim, Chemomab, CSL Behring, Genentech/Roche, Horizon, Paracrine Cell Therapy, Mitsubishi Tanabe Pharma, Prometheus and Theraly. Z.H.M., S.K. and J.Z.C. declare no competing interests.
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McMahan, Z.H., Kulkarni, S., Chen, J. et al. Systemic sclerosis gastrointestinal dysmotility: risk factors, pathophysiology, diagnosis and management. Nat Rev Rheumatol 19, 166–181 (2023). https://doi.org/10.1038/s41584-022-00900-6
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DOI: https://doi.org/10.1038/s41584-022-00900-6
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