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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 <t>p19,</t> syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.
Htlv Type I P19, supplied by ZeptoMetrix corporation, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 <t>p19,</t> syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.
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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 <t>p19,</t> syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.
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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 <t>p19,</t> syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.
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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 <t>p19,</t> syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.
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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 <t>p19,</t> syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.
Female Wild Type Mouse, supplied by Novus Biologicals, used in various techniques. Bioz Stars score: 93/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 p19, syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.

Journal: Journal of Medical Virology

Article Title: Persistent Human T‐Lymphotropic Virus Type 1 (HTLV‐1) Infection in the Placenta of Pregnant Women

doi: 10.1002/jmv.70585

Figure Lengend Snippet: Syncytin‐1 may mediate HTLV‐1 infection of placental trophoblasts. (A) Expression of syncytin‐1 receptors ASCT1 and ASCT2 on MT‐2 cells was measured by flow cytometry. (B) A schematic diagram of the coculture protocol for HTLV‐1 transfer to trophoblasts. BeWo cells or PCTs were cocultured with MT‐2 cells (10:1 ratio of MT‐2 and target cells) for 48 h, followed by washing and further incubation. (C) Representative phase‐contrast images (scale bar = 200 μm) show reduced confluency in BeWo cells cocultured with MT‐2 cells. (D) Protein levels of HTLV‐1 p19, syncytin‐1, and β‐actin in BeWo cells and PCTs under basal conditions or after forskolin induction (20–50 μM for BeWo; 50–100 μM for PCTs), with or without HRB1‐mediated syncytin‐1 cell fusion blockade. The relative intensity of p19 expression is shown below with data normalized to the BeWo or PCT cocultured with MT‐2 cells without forskolin treatment. Syncytin‐1 expression was normalized to the corresponding group without forskolin treatment.

Article Snippet: Protein expression was assessed using the following antibodies: anti‐HTLV type I p19 clone 45/6.11.1.3 (1:2000, ZeptoMetrix), syncytin‐1 polyclonal antibody (1:3000, Bioss), and β‐actin antibody (1:2500, Cell Signaling).

Techniques: Infection, Expressing, Flow Cytometry, Incubation