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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Lab+Invest 2021 ; 101 (3): 274-279 Nephropedia Template TP
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COVID-19 and graft-versus-host disease: a tale of two diseases (and why age matters) #MMPMID33299126
Murphy GF
Lab Invest 2021[Mar]; 101 (3): 274-279 PMID33299126show ga
Disorders involving injury to tissue stem cells that ensure normal tissue homeostasis and repair have potential to show unusually devastating clinical consequences. Acute graft-versus-host disease (aGVHD) is one condition where relatively few cytotoxic immune cells target skin stem cells to produce significant morbidity and mortality. By analogy, SARS-CoV-2 is a vector that initially homes to pulmonary stem cells that preferentially express the ACE2 receptor, thus potentially incurring similarly robust pathological consequences. In older individuals, stem cell number and/or function become depleted due to pathways independent of disease-related injury to these subpopulations. Accordingly, pathologic targeting of stem cells in conditions like aGVHD and COVID-19 infection where these cells are already deficient due to the aging process may have dire consequences in elderly individuals. A hypothesis is herein advanced that, as with aGVHD, lung stem cell targeting is a potential co-factor in explaining age-related severity of COVID-19 infection.
|*SARS-CoV-2/pathogenicity[MESH]
|Age Factors[MESH]
|Aging/immunology/pathology[MESH]
|COVID-19/*etiology/immunology/pathology[MESH]
|Graft vs Host Disease/*etiology/immunology/pathology[MESH]