People infected with the mpox virus typically develop rashes and skin lesions, often leading to scarring and disfigurement and the lab-grown skin organoids now help show why.
KAUST’s Alam and Incitti collaborated with Qiuwei Abdullah Pan and his team from the Erasmus MC-University Medical Center in Rotterdam to report that the virus takes up residence inside keratinocytes, the predominant cell type in the skin’s outer layer. There, the virus undergoes its four steps of assembly, a process that the researchers could observe under high-power microscopes.
Gene expression analyses conducted by the researchers revealed that numerous viral genes become activated in the days following infection. This activation, in turn, appears to induce changes in host cells, leading to alterations in the activity of multiple human genes associated with immunity and cell death.
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These genetic alterations likely compromise the skin’s protective barrier, resulting in the characteristic lesions observed in infected people.
The observed effects could be reversed through use of an antiviral drug called tecovirimat. In the infected organoids, this drug proved highly effective in halting virus replication and thwarting the subversion of host cells.
They also underscore the potential of the organoid system as a versatile platform with which to screen for novel substances with similar properties.
Notably, the impact of mpox extends beyond skin-related issues. In severe cases, the virus can wreak havoc on internal organs. The same KAUST-affiliated research team previously developed a kidney organoid system designed to study mpox infections in renal tissues. Other groups have investigated mpox dynamics within colon and brain organoids.
“These studies all complement each other by modeling infection in different tissues and with different types of disease manifestations,” says Incitti.
Collectively, the efforts in organoid models which the KAUST researchers and their collaborators are now extending to other viral infection systems as well should “help to combat the current mpox outbreak and enhance pandemic preparedness for the future,” Incitti says.
Source: Eurekalert
