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cellzscope nanoanalytics serial #czs0110814  (nanoAnalytics gmbh)
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nanoAnalytics gmbh cellzscope nanoanalytics serial #czs0110814
Cellzscope Nanoanalytics Serial #Czs0110814, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/us11820975-332-1-2?v=nanoAnalytics+gmbh
Average 90 stars, based on 1 article reviews
cellzscope nanoanalytics serial #czs0110814 - by Bioz Stars, 2026-08
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cellzscope 24-cell module  (nanoAnalytics gmbh)
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nanoAnalytics gmbh cellzscope 24-cell module
Cellzscope 24 Cell Module, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Average 90 stars, based on 1 article reviews
cellzscope 24-cell module - by Bioz Stars, 2026-08
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cellzscope software  (nanoAnalytics gmbh)
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope Software, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/pmc07473757-98-6-10?v=nanoAnalytics+gmbh
Average 90 stars, based on 1 article reviews
cellzscope software - by Bioz Stars, 2026-08
90/100 stars
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cellzscopes  (nanoAnalytics gmbh)
90
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscopes, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/10__1039_slash_c3mt00039g-78-20-21?v=nanoAnalytics+gmbh
Average 90 stars, based on 1 article reviews
cellzscopes - by Bioz Stars, 2026-08
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cellzscope device  (nanoAnalytics gmbh)
90
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope Device, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/pm37765214-119-30-32?v=nanoAnalytics+gmbh
Average 90 stars, based on 1 article reviews
cellzscope device - by Bioz Stars, 2026-08
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cellzscope2  (nanoAnalytics gmbh)
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope2, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/pm37875964-99-25-26?v=nanoAnalytics+gmbh
Average 90 stars, based on 1 article reviews
cellzscope2 - by Bioz Stars, 2026-08
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cellzscope apparatus  (nanoAnalytics gmbh)
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope Apparatus, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Average 90 stars, based on 1 article reviews
cellzscope apparatus - by Bioz Stars, 2026-08
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cellzscope impedance spectroscope  (nanoAnalytics gmbh)
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nanoAnalytics gmbh cellzscope impedance spectroscope
Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope Impedance Spectroscope, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/pm35323756-118-1-4?v=nanoAnalytics+gmbh
Average 90 stars, based on 1 article reviews
cellzscope impedance spectroscope - by Bioz Stars, 2026-08
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automated cell monitoring system cellzscope  (nanoAnalytics gmbh)
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Automated Cell Monitoring System Cellzscope, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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automated cell monitoring system cellzscope - by Bioz Stars, 2026-08
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automated cell monitoring system cellzscope version czs0101909  (nanoAnalytics gmbh)
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Automated Cell Monitoring System Cellzscope Version Czs0101909, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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automated cell monitoring system cellzscope version czs0101909 - by Bioz Stars, 2026-08
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cellzscope instrument  (nanoAnalytics gmbh)
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Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope Instrument, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/pm26924227-81-25-27?v=nanoAnalytics+gmbh
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cellzscope instrument - by Bioz Stars, 2026-08
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cellzscope module  (nanoAnalytics gmbh)
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nanoAnalytics gmbh cellzscope module
Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, <t>cellZscope.</t> Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.
Cellzscope Module, supplied by nanoAnalytics gmbh, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/product/cellzscopes/pmc06503375-67-8-10?v=nanoAnalytics+gmbh
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cellzscope module - by Bioz Stars, 2026-08
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Image Search Results


Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, cellZscope. Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.

Journal: International Journal of Oncology

Article Title: E7 oncoprotein from human papillomavirus 16 alters claudins expression and the sealing of epithelial tight junctions

doi: 10.3892/ijo.2020.5105

Figure Lengend Snippet: Stable expression of E7 in MDCK monolayers induces the development of a higher peak of TER and changes the expression of claudins. (A) Parental MDCK and MDCK-E7 monolayers plated in Transwell inserts were subjected to a Ca-switch and the development of TER was measured using the automated cell monitoring system, cellZscope. Data are presented the mean ± SD from three independent monolayers per condition plated on Transwell inserts. Statistical analysis was performed at the 18 h with Student's t-test. **** P<0.0001. (B) Immunofluorescence detection of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative images from three independent experiments. Scale bar, 10 µ m. (C) Mean fluorescence intensity measurements of Cl-1, -2, -4 and -10 performed at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Data derived from three independent images from each condition and from three independent experiments. Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. **** P<0.0001. (D) Western blot analysis of Cl-1, -2, -4 and -10 at the peak of TER (18 h) in parental and MDCK-E7 monolayers. Representative western blots of at least three independent experiments (left panel) and the densitometry analysis (right panel). Statistical analysis was performed using Student's t-test. Data are presented as the mean ± standard deviation. * P<0.05, ** P<0.01, **** P<0.0001. Ca, calcium; Cl, claudin; TER, transepithelial electrical resistance; MDCK, Madin-Darby Canine Kidney; MDCK-E7, MDCK cells transfected with E7 from HPV; HPV, human papillomavirus.

Article Snippet: TER values were obtained using the CellZscope software (version 2.2.0.16827; nanoAnalytics GmbH).

Techniques: Expressing, Immunofluorescence, Fluorescence, Derivative Assay, Standard Deviation, Western Blot, Transfection