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Medicine and Health Sciences

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LSU Health Science Center

2024

Inflammation

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Unconventional Activation Of Prkdc By Tnf-Α: Deciphering Its Crucial Role In Th1-Mediated Inflammation Beyond Dna Repair As Part Of The Dna-Pk Complex, Mohamed A. Ghonim, Jihang Ju, Kusma Pyakurel, Salome V. Ibba, Mai M. Abouzeid, Hamada F. Rady, Shigemi Matsuyama, Luis Del Valle, A. Hamid Boulares Apr 2024

Unconventional Activation Of Prkdc By Tnf-Α: Deciphering Its Crucial Role In Th1-Mediated Inflammation Beyond Dna Repair As Part Of The Dna-Pk Complex, Mohamed A. Ghonim, Jihang Ju, Kusma Pyakurel, Salome V. Ibba, Mai M. Abouzeid, Hamada F. Rady, Shigemi Matsuyama, Luis Del Valle, A. Hamid Boulares

School of Medicine Faculty Publications

Background: The DNA-dependent protein kinase (DNA-PK) complex comprises a catalytic (PRKDC) and two requisite DNA-binding (Ku70/Ku80) subunits. The role of the complex in repairing double-stranded DNA breaks (DSBs) is established, but its role in inflammation, as a complex or individual subunits, remains elusive. While only ~ 1% of PRKDC is necessary for DNA repair, we reported that partial inhibition blocks asthma in mice without causing SCID. Methods: We investigated the central role of PRKDC in inflammation and its potential association with DNA repair. We also elucidated the relationship between inflammatory cytokines (e.g., TNF-α) and PRKDC by analyzing its connections to …


Tailoring T Fh Profiles Enhances Antibody Persistence To A Clade C Hiv-1 Vaccine In Rhesus Macaques, Anil Verma, Chase E. Hawes, Sonny R. Elizaldi, Justin C. Smith, Dhivyaa Rajasundaram, Gabriel Kristian Pedersen, Xiaoying Shen, La Tonya D. Williams, Georgia D. Tomaras, Pamela A. Kozlowski, Rama R. Amara, Smita S. Iyer Feb 2024

Tailoring T Fh Profiles Enhances Antibody Persistence To A Clade C Hiv-1 Vaccine In Rhesus Macaques, Anil Verma, Chase E. Hawes, Sonny R. Elizaldi, Justin C. Smith, Dhivyaa Rajasundaram, Gabriel Kristian Pedersen, Xiaoying Shen, La Tonya D. Williams, Georgia D. Tomaras, Pamela A. Kozlowski, Rama R. Amara, Smita S. Iyer

School of Medicine Faculty Publications

CD4 T follicular helper cells (Tfh) are essential for establishing serological memory and have distinct helper attributes that impact both the quantity and quality of the antibody response. Insights into Tfh subsets that promote antibody persistence and functional capacity can critically inform vaccine design. Based on the Tfh profiles evoked by the live attenuated measles virus vaccine, renowned for its ability to establish durable humoral immunity, we investigated the potential of a Tfh1/17 recall response during the boost phase to enhance persistence of HIV-1 Envelope (Env) antibodies in rhesus macaques. Using a DNA-prime encoding gp160 antigen and Tfh polarizing cytokines …


Probiotic Limosilactobacillus Reuteri Dsm 17938 Changes Foxp3 Deficiency-Induced Dyslipidemia And Chronic Hepatitis In Mice, Erini Nessim Kostandy, Ji Ho Suh, Xiangjun Tian, Beanna Okeugo, Erin Rubin, Sara Shirai, Meng Luo, Christopher M. Taylor, Kang Ho Kim, J. Marc Rhoads, Yuying Liu Feb 2024

Probiotic Limosilactobacillus Reuteri Dsm 17938 Changes Foxp3 Deficiency-Induced Dyslipidemia And Chronic Hepatitis In Mice, Erini Nessim Kostandy, Ji Ho Suh, Xiangjun Tian, Beanna Okeugo, Erin Rubin, Sara Shirai, Meng Luo, Christopher M. Taylor, Kang Ho Kim, J. Marc Rhoads, Yuying Liu

School of Medicine Faculty Publications

The probiotic Limosilactobacillus reuteri DSM 17938 produces anti-inflammatory effects in scurfy (SF) mice, a model characterized by immune dysregulation, polyendocrinopathy, enteropathy, and X-linked inheritance (called IPEX syndrome in humans), caused by regulatory T cell (Treg) deficiency and is due to a Foxp3 gene mutation. Considering the pivotal role of lipids in autoimmune inflammatory processes, we investigated alterations in the relative abundance of lipid profiles in SF mice (± treatment with DSM 17938) compared to normal WT mice. We also examined the correlation between plasma lipids and gut microbiota and circulating inflammatory markers. We noted a significant upregulation of plasma lipids …


Impaired Neutrophil Extracellular Trap-Forming Capacity Contributes To Susceptibility To Chronic Vaginitis In A Mouse Model Of Vulvovaginal Candidiasis, Junko Yano, Paul L. Fidel Jan 2024

Impaired Neutrophil Extracellular Trap-Forming Capacity Contributes To Susceptibility To Chronic Vaginitis In A Mouse Model Of Vulvovaginal Candidiasis, Junko Yano, Paul L. Fidel

School of Dentistry Faculty Publications

Vulvovaginal candidiasis (VVC), caused by is characterized by aberrant inflammation by polymorphonuclear neutrophils (PMNs) in the vaginal lumen. Data from the established murine model shows that despite potent antifungal properties, PMNs fail to clear due to local heparan sulfate that inhibits the interaction between PMNs and , resulting in chronic vaginal immunopathology. To understand the role of neutrophil extracellular traps (NETs) in defense against at the vaginal mucosa, we investigated the NET-forming capacity of PMNs in chronic VVC-susceptible (CVVC-S/C3H) and -resistant (CVVC-R/CD-1) mouse strains. Immunofluorescence revealed the formation of NETs (release of DNA with PMN-derived antimicrobial proteins) in PMN cocultures …