The Targeted Delivery of Interleukin 4 Inhibits Development of Endometriotic Lesions in a Mouse Model

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Targeted delivery of interleukin 4 with F8-IL4 antibody in mice significantly reduced endometriosis lesion number and volume, downregulating genes involved in adhesion, invasion, and vascularization.

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The study evaluated whether antibody-based targeted delivery of interleukin-4 (F8-IL4) to neo-vasculature could inhibit experimentally induced endometriosis-like lesion development in Balb/c mice, comparing it with untargeted IL4 (KSF-IL4). After lesion induction, mice received intravenous treatment and, 12 days later, the researchers quantified lesion number and volume and assessed lesion gene expression by qRT-PCR for markers of adhesion, extracellular matrix invasion, neovascularization, and inflammatory cytokines, with E-cadherin and β-catenin evaluated by immunohistochemistry. F8-IL4 significantly reduced total lesions per mouse and total lesion volume versus controls, and downregulated integrin β1, MMP3, MMP9, and vascular endothelial growth factor; inflammatory cytokine expression did not differ, and E-cadherin and β-catenin were reduced. The paper does not explicitly state limitations in the provided text. This paper is centrally about endometriosis — it tests F8-IL4 targeted cytokine delivery and reports inhibition of endometriotic lesion development in a mouse model.

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Abstract

Endometriosis is caused by the displacement of endometrium outside the uterus contributing heavily to infertility and debilitating pelvic pain. Ectopic adhesion and growth are believed to occur under the influence of a favorable hormonal environment and immunological factors. The objective of this study is to analyze the effect of a targeted therapy with an antibody-based pharmacodelivery of interleukin 4 (F8-IL4) in a mouse model of experimentally induced endometriosis. Endometriosis-like lesions were induced in Balb/c mice. The animals were treated intravenously with F8-IL4 or with untargeted IL4 (KSF-IL4). Twelve days after disease induction, the lesions were isolated. A significant reduction in the number of total lesions/mouse and in the total volume of lesions/mouse was observed in mice treated with F8-IL4 compared to controls (P = .029 and P = .006, respectively), while no difference was found between KSF-IL4-treated mice and their controls. Gene expression was evaluated by quantitative real-time polymerase chain reaction. Expression of genes involved in cell adhesion, extracellular matrix invasion, and neovascularization was significantly downregulated in F8-IL4-treated mice compared to their controls (integrin β1: P = .02; metalloproteinase [MMP] 3: P = .02; MMP9: P = .04; vascular endothelial growth factor: P = .04). Gene expression of inflammatory cytokines (tumor necrosis factor α, IL1β, IL1α, and IL6) did not vary in the ectopic lesions isolated from F8-IL4-treated mice compared to their controls. Immunohistochemistry demonstrated a significantly reduced expression of E-cadherin and β-catenin in the lesions of mice treated with F8-IL4. Our results show that the antibody-mediated targeted delivery of IL4 inhibits the development of endometriosis in a syngeneic mouse model by likely impairing adhesion, invasion, and vascularization of the ectopic endometrium.
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Abstract

Endometriosis is caused by the displacement of endometrium outside the uterus contributing heavily to infertility and debilitating pelvic pain. Ectopic adhesion and growth are believed to occur under the influence of a favorable hormonal environment and immunological factors. The objective of this study is to analyze the effect of a targeted therapy with an antibody-based pharmacodelivery of interleukin 4 (F8-IL4) in a mouse model of experimentally induced endometriosis. Endometriosis-like lesions were induced in Balb/c mice. The animals were treated intravenously with F8-IL4 or with untargeted IL4 (KSF-IL4). Twelve days after disease induction, the lesions were isolated. A significant reduction in the number of total lesions/mouse and in the total volume of lesions/mouse was observed in mice treated with F8-IL4 compared to controls (P = .029 and P = .006, respectively), while no difference was found between KSF-IL4-treated mice and their controls. Gene expression was evaluated by quantitative real-time polymerase chain reaction. Expression of genes involved in cell adhesion, extracellular matrix invasion, and neovascularization was significantly downregulated in F8-IL4-treated mice compared to their controls (integrin β1: P = .02; metalloproteinase [MMP] 3: P = .02; MMP9: P = .04; vascular endothelial growth factor: P = .04). Gene expression of inflammatory cytokines (tumor necrosis factor α, IL1β, IL1α, and IL6) did not vary in the ectopic lesions isolated from F8-IL4-treated mice compared to their controls. Immunohistochemistry demonstrated a significantly reduced expression of E-cadherin and β-catenin in the lesions of mice treated with F8-IL4. Our results show that the antibody-mediated targeted delivery of IL4 inhibits the development of endometriosis in a syngeneic mouse model by likely impairing adhesion, invasion, and vascularization of the ectopic endometrium. Similar content being viewed by others

References

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endometriosis

MeSH descriptors

Antibodies, Monoclonal Drug Delivery Systems Endometriosis Endometrium Immunoconjugates Immunoglobulin Variable Region Interleukin-4 Animals Antibodies, Monoclonal Antibodies, Monoclonal Antibodies, Monoclonal Antibodies, Monoclonal, Humanized beta Catenin beta Catenin beta Catenin Cadherins Cadherins Cadherins Cell Adhesion Cell Adhesion

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