{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/99252"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/99252","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Finding NEMO by the molluscum contagiosum virus MC159 protein and its effect on viral pathogenesis in vivo","abstract":"Molluscum contagiosum virus (MCV) is a dermatotropic poxvirus that solely infects humans. MCV infections causes benign neoplastic lesions that can persists for few months in children and adults. It is an opportunistic infection in immunocompromised patients. Currently there is no FDA approved drug available for MCV infections. The knowledge of MCV pathogenesis is rudimentary because there is no proper system of propagation nor an animal model to study MCV during infection. The proinflammatory cytokine Tumor Necrosis Factor (TNF) is highly expressed in MCV lesions and surrounding tissues. Interestingly, MCV causes little to no inflammation despite the expression of proinflammatory cytokines. This is because MCV encodes immunomodulatory proteins like MC159 protein to antagonize/neutralize TNF and other aspects of the proinflammatory immune response. For example, the MCV MC159 protein suppresses NF-kB activation, a powerful anti-viral response, via interactions with the NEMO subunit of the IKK complex. The exact molecular mechanism that inhibited IKK and NF-kB activation remained unknown and the work presented here identifies this mechanism. Briefly, I found that MC159 antagonizes cIAP1-NEMO interactions to inhibit NEMO polyubiquitination and thus NF-kB activation. This is a novel finding of a viral protein to disrupt NEMO-cIAP1 interactions to strategically suppress IKK activation (Chapter II). I also found that MC159 can inhibit NF-kB activation triggered by genotoxic stress. This signal transduction pathway has some unique features that are missing during TNF-induced NF-kB activation. I used mutational analysis of MC159 to identify that there are some regions of MC159 that are important for protecting against genotoxic-stress induced NF-kB activation but not TNF-induced NF-kB activation (Chapter IV). The importance of MC159 and its homolog MC160 during MCV infection has remained unknown, as there is no standard tissue culture for propagation or an animal model of infection. All of the functions of MC159 and MC160 were identified by expressing MC159 independent of infection. To bridge this gap in knowledge, I investigated if a surrogate virus (vaccinia virus), lacking an inhibitor of NF-kB (DA49), could be used to study the functions of MCV proteins during vaccinia virus infections in mice. We created two recombinant vaccinia viruses, vMC159 and vMC160 expressing MC159L and MC160L genes, respectively. My hypothesis was that MC159 and MC160 would functionally substitute for A49 and restore the virulence of the virus (vDA49). I found that vMC159 functions in vivo was most striking as it was less virulent in both intranasal (IN) and intradermal (ID) route of inoculation. In the ID model of infection, vMC159 did not form any lesions in vMC159-infected ear pinnae in spite of harboring infectious vMC159 particles 11 days post-infection. Thus, this approach provides, for the first time, an examination of how MCV proteins may aid in virus virulence within the context of a complete and complex immune system (Chapter III).","abstract_html":"Molluscum contagiosum virus (MCV) is a dermatotropic poxvirus that solely infects humans. MCV infections causes benign neoplastic lesions that can persists for few months in children and adults. It is an opportunistic infection in immunocompromised patients. Currently there is no FDA approved drug available for MCV infections. The knowledge of MCV pathogenesis is rudimentary because there is no proper system of propagation nor an animal model to study MCV during infection. The proinflammatory cytokine Tumor Necrosis Factor (TNF) is highly expressed in MCV lesions and surrounding tissues. Interestingly, MCV causes little to no inflammation despite the expression of proinflammatory cytokines. This is because MCV encodes immunomodulatory proteins like MC159 protein to antagonize/neutralize TNF and other aspects of the proinflammatory immune response. For example, the MCV MC159 protein suppresses NF-kB activation, a powerful anti-viral response, via interactions with the NEMO subunit of the IKK complex. The exact molecular mechanism that inhibited IKK and NF-kB activation remained unknown and the work presented here identifies this mechanism. Briefly, I found that MC159 antagonizes cIAP1-NEMO interactions to inhibit NEMO polyubiquitination and thus NF-kB activation. This is a novel finding of a viral protein to disrupt NEMO-cIAP1 interactions to strategically suppress IKK activation (Chapter II). I also found that MC159 can inhibit NF-kB activation triggered by genotoxic stress. This signal transduction pathway has some unique features that are missing during TNF-induced NF-kB activation. I used mutational analysis of MC159 to identify that there are some regions of MC159 that are important for protecting against genotoxic-stress induced NF-kB activation but not TNF-induced NF-kB activation (Chapter IV). The importance of MC159 and its homolog MC160 during MCV infection has remained unknown, as there is no standard tissue culture for propagation or an animal model of infection. All of the functions of MC159 and MC160 were identified by expressing MC159 independent of infection. To bridge this gap in knowledge, I investigated if a surrogate virus (vaccinia virus), lacking an inhibitor of NF-kB (DA49), could be used to study the functions of MCV proteins during vaccinia virus infections in mice. We created two recombinant vaccinia viruses, vMC159 and vMC160 expressing MC159L and MC160L genes, respectively. My hypothesis was that MC159 and MC160 would functionally substitute for A49 and restore the virulence of the virus (vDA49). I found that vMC159 functions in vivo was most striking as it was less virulent in both intranasal (IN) and intradermal (ID) route of inoculation. In the ID model of infection, vMC159 did not form any lesions in vMC159-infected ear pinnae in spite of harboring infectious vMC159 particles 11 days post-infection. Thus, this approach provides, for the first time, an examination of how MCV proteins may aid in virus virulence within the context of a complete and complex immune system (Chapter III).","abstract_has_math":false,"creators":["Biswas, Sunetra"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Microbiology","degree_department":null,"school":null,"contributors":["Shisler, Joanna L.","Wilson, Brenda A.","Blanke, Steven R.","Slauch, James M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2018,"date_issued":"2018-03-13T15:28:41Z","date_published":"2018-03-13T15:28:41Z","updated_at":"2026-07-22T22:24:37Z","subjects":["NF-κB essential modulator (NEMO)","Molluscumcontagiosum virus (MCV)","NF-kappaB","MC159","MC160","cIAP1","Polyubiquitination","Virus","Genotoxic stress"],"languages":["en"],"rights":["Copyright 2017 Sunetra Biswas"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/99252","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Shisler, Joanna L.","Wilson, Brenda A.","Blanke, Steven R.","Slauch, James M."]},{"key":"dc:creator","label":"Author","values":["Biswas, Sunetra"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-03-13T15:28:41Z","2020-03-14T09:15:31Z","2017-12-08","2017-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Microbiology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["NF-κB essential modulator (NEMO)","Molluscumcontagiosum virus (MCV)","NF-kappaB","MC159","MC160","cIAP1","Polyubiquitination","Virus","Genotoxic stress"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2017 Sunetra Biswas"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/99252"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Molluscum contagiosum virus (MCV) is a dermatotropic poxvirus that solely infects humans. MCV infections causes benign neoplastic lesions that can persists for few months in children and adults. It is an opportunistic infection in immunocompromised patients. Currently there is no FDA approved drug available for MCV infections. The knowledge of MCV pathogenesis is rudimentary because there is no proper system of propagation nor an animal model to study MCV during infection. The proinflammatory cytokine Tumor Necrosis Factor (TNF) is highly expressed in MCV lesions and surrounding tissues. Interestingly, MCV causes little to no inflammation despite the expression of proinflammatory cytokines. This is because MCV encodes immunomodulatory proteins like MC159 protein to antagonize/neutralize TNF and other aspects of the proinflammatory immune response. For example, the MCV MC159 protein suppresses NF-kB activation, a powerful anti-viral response, via interactions with the NEMO subunit of the IKK complex. The exact molecular mechanism that inhibited IKK and NF-kB activation remained unknown and the work presented here identifies this mechanism. Briefly, I found that MC159 antagonizes cIAP1-NEMO interactions to inhibit NEMO polyubiquitination and thus NF-kB activation. This is a novel finding of a viral protein to disrupt NEMO-cIAP1 interactions to strategically suppress IKK activation (Chapter II). I also found that MC159 can inhibit NF-kB activation triggered by genotoxic stress. This signal transduction pathway has some unique features that are missing during TNF-induced NF-kB activation. I used mutational analysis of MC159 to identify that there are some regions of MC159 that are important for protecting against genotoxic-stress induced NF-kB activation but not TNF-induced NF-kB activation (Chapter IV). The importance of MC159 and its homolog MC160 during MCV infection has remained unknown, as there is no standard tissue culture for propagation or an animal model of infection. All of the functions of MC159 and MC160 were identified by expressing MC159 independent of infection. To bridge this gap in knowledge, I investigated if a surrogate virus (vaccinia virus), lacking an inhibitor of NF-kB (DA49), could be used to study the functions of MCV proteins during vaccinia virus infections in mice. We created two recombinant vaccinia viruses, vMC159 and vMC160 expressing MC159L and MC160L genes, respectively. My hypothesis was that MC159 and MC160 would functionally substitute for A49 and restore the virulence of the virus (vDA49). I found that vMC159 functions in vivo was most striking as it was less virulent in both intranasal (IN) and intradermal (ID) route of inoculation. In the ID model of infection, vMC159 did not form any lesions in vMC159-infected ear pinnae in spite of harboring infectious vMC159 particles 11 days post-infection. Thus, this approach provides, for the first time, an examination of how MCV proteins may aid in virus virulence within the context of a complete and complex immune system (Chapter III).","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-12-01","The student, Sunetra Biswas, accepted the attached license on 2017-12-07 at 14:46.","The student, Sunetra Biswas, submitted this Dissertation for approval on 2017-12-07 at 15:03.","This Dissertation was approved for publication on 2017-12-08 at 08:59.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11906 on 2018-03-13 at 09:57:40","Made available in DSpace on 2018-03-13T15:28:41Z (GMT). No. of bitstreams: 2 BISWAS-DISSERTATION-2017.pdf: 17227831 bytes, checksum: 978027bcbb5d93b1c94ac38f7ad2c93f (MD5) LICENSE.txt: 4211 bytes, checksum: 2a91748e50dc84a8f07c34ebad876840 (MD5) Previous issue date: 2017-12-08","Embargo set by: Seth Robbins for item 105216 Lift date: 2020-03-13T15:28:52Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 105216 on 2020-03-14T09:15:31Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Finding NEMO by the molluscum contagiosum virus MC159 protein and its effect on viral pathogenesis in vivo"]}]}],"canonical_facts":{"dc:contributor":["Shisler, Joanna L.","Wilson, Brenda A.","Blanke, Steven R.","Slauch, James M."],"dc:creator":["Biswas, Sunetra"],"dc:date":["2018-03-13T15:28:41Z","2020-03-14T09:15:31Z","2017-12-08","2017-12"],"dc:description":["Molluscum contagiosum virus (MCV) is a dermatotropic poxvirus that solely infects humans. MCV infections causes benign neoplastic lesions that can persists for few months in children and adults. It is an opportunistic infection in immunocompromised patients. Currently there is no FDA approved drug available for MCV infections. The knowledge of MCV pathogenesis is rudimentary because there is no proper system of propagation nor an animal model to study MCV during infection. The proinflammatory cytokine Tumor Necrosis Factor (TNF) is highly expressed in MCV lesions and surrounding tissues. Interestingly, MCV causes little to no inflammation despite the expression of proinflammatory cytokines. This is because MCV encodes immunomodulatory proteins like MC159 protein to antagonize/neutralize TNF and other aspects of the proinflammatory immune response. For example, the MCV MC159 protein suppresses NF-kB activation, a powerful anti-viral response, via interactions with the NEMO subunit of the IKK complex. The exact molecular mechanism that inhibited IKK and NF-kB activation remained unknown and the work presented here identifies this mechanism. Briefly, I found that MC159 antagonizes cIAP1-NEMO interactions to inhibit NEMO polyubiquitination and thus NF-kB activation. This is a novel finding of a viral protein to disrupt NEMO-cIAP1 interactions to strategically suppress IKK activation (Chapter II). I also found that MC159 can inhibit NF-kB activation triggered by genotoxic stress. This signal transduction pathway has some unique features that are missing during TNF-induced NF-kB activation. I used mutational analysis of MC159 to identify that there are some regions of MC159 that are important for protecting against genotoxic-stress induced NF-kB activation but not TNF-induced NF-kB activation (Chapter IV). The importance of MC159 and its homolog MC160 during MCV infection has remained unknown, as there is no standard tissue culture for propagation or an animal model of infection. All of the functions of MC159 and MC160 were identified by expressing MC159 independent of infection. To bridge this gap in knowledge, I investigated if a surrogate virus (vaccinia virus), lacking an inhibitor of NF-kB (DA49), could be used to study the functions of MCV proteins during vaccinia virus infections in mice. We created two recombinant vaccinia viruses, vMC159 and vMC160 expressing MC159L and MC160L genes, respectively. My hypothesis was that MC159 and MC160 would functionally substitute for A49 and restore the virulence of the virus (vDA49). I found that vMC159 functions in vivo was most striking as it was less virulent in both intranasal (IN) and intradermal (ID) route of inoculation. In the ID model of infection, vMC159 did not form any lesions in vMC159-infected ear pinnae in spite of harboring infectious vMC159 particles 11 days post-infection. Thus, this approach provides, for the first time, an examination of how MCV proteins may aid in virus virulence within the context of a complete and complex immune system (Chapter III).","Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2019-12-01","The student, Sunetra Biswas, accepted the attached license on 2017-12-07 at 14:46.","The student, Sunetra Biswas, submitted this Dissertation for approval on 2017-12-07 at 15:03.","This Dissertation was approved for publication on 2017-12-08 at 08:59.","DSpace SAF Submission Ingestion Package generated from Vireo submission #11906 on 2018-03-13 at 09:57:40","Made available in DSpace on 2018-03-13T15:28:41Z (GMT). No. of bitstreams: 2 BISWAS-DISSERTATION-2017.pdf: 17227831 bytes, checksum: 978027bcbb5d93b1c94ac38f7ad2c93f (MD5) LICENSE.txt: 4211 bytes, checksum: 2a91748e50dc84a8f07c34ebad876840 (MD5) Previous issue date: 2017-12-08","Embargo set by: Seth Robbins for item 105216 Lift date: 2020-03-13T15:28:52Z Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system","U of I Only Restriction Lifted for Item 105216 on 2020-03-14T09:15:31Z."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/99252"],"dc:language":["en"],"dc:rights":["Copyright 2017 Sunetra Biswas"],"dc:subject":["NF-κB essential modulator (NEMO)","Molluscumcontagiosum virus (MCV)","NF-kappaB","MC159","MC160","cIAP1","Polyubiquitination","Virus","Genotoxic stress"],"dc:title":["Finding NEMO by the molluscum contagiosum virus MC159 protein and its effect on viral pathogenesis in vivo"],"dc:type":["text"],"thesis:degree_discipline":["Microbiology"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:37Z"}