Juliane Friemel - Academia.edu (original) (raw)

Uploads

Papers by Juliane Friemel

Research paper thumbnail of Impact of the PI3K-alpha inhibitor alpelisib on everolimus resistance and somatostatin receptor expression in an orthotopic pancreatic NEC xenograft mouse model

Endocrine-related Cancer, Nov 8, 2023

Research paper thumbnail of Supplementary figure 2 from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

non-tumorous murine livers

Research paper thumbnail of Immunohistochemical biomarker expression in gastro-entero-pancreatic neuroendocrine tumors at ENETS Centre of Excellence, University Hospital Zurich, Switzerland

Journal of Clinical Oncology, May 20, 2020

e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous t... more e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous tumor entity with respect to biological behaviour and prognosis. Definition of new predictive and prognostic biomarkers as well as new therapy targets are of upmost clinical interest. Methods: At the ENETS CoE Zurich tissue microarray (TMA) blocks were constructed with 147 tissue samples of tumors diagnosed from 2000 to 2017, including primary tumors and metastasis. Tissue microarray sections were immunostained for SOX-9, SOX-10, SSTR-2 +, PDL-1, thyroid transcription factor 1 (TTF1), estrogen receptor-α (ER-α) and -β (ER-β), progesterone receptor (PR), androgen receptor (AR), BRAF and HER2. Results: In total 270 patients were screened between 2000 - 2017 and 92 patient’s material were sufficient for TMA analysis. Subgroup analysis showed 32 pancreatic, 37 ileum, 10 duodenum, 7 appendix, 3 colorectal, 3 gastric and 1 NET of gallbladder. 50% were male, the median age 63.5 years (range 19-88y). AR, ER-β, TTF1, PDL-1 and SOX10 was only present in a small number of NETs. HER2 and BRAF were negative in all samples. We found ER-α expression in 27.2%, 30% were PR positive and 67.4% showed SOX9 expression. Conclusions: We identified a frequent expression of new markers as SOX9, progesterone receptor and estrogen receptor-α in a broad amount of samples and a potential correlation with tumor grade. This finding might implicate a prognostic or predictive value of these markers, as well as it reveals new potential therapy targets for GEP-NETs. Therefore, further analyses are planned.

Research paper thumbnail of Tumor im Dünndarm bei Peutz-Jeghers-Syndrom

Research paper thumbnail of Supplementary Table 2 from The Stem Cell Factor <i>HMGA2</i> Is Expressed in Non-HPV–Associated Head and Neck Squamous Cell Carcinoma and Predicts Patient Survival of Distinct Subsites

Research paper thumbnail of Supplementary Table 1 from The Stem Cell Factor <i>HMGA2</i> Is Expressed in Non-HPV–Associated Head and Neck Squamous Cell Carcinoma and Predicts Patient Survival of Distinct Subsites

Research paper thumbnail of Immunohistochemical biomarker expression in gastro-entero-pancreatic neuroendocrine tumors at ENETS Centre of Excellence, University Hospital Zurich, Switzerland

Journal of Clinical Oncology, 2020

e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous t... more e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous tumor entity with respect to biological behaviour and prognosis. Definition of new predictive and prognostic biomarkers as well as new therapy targets are of upmost clinical interest. Methods: At the ENETS CoE Zurich tissue microarray (TMA) blocks were constructed with 147 tissue samples of tumors diagnosed from 2000 to 2017, including primary tumors and metastasis. Tissue microarray sections were immunostained for SOX-9, SOX-10, SSTR-2 +, PDL-1, thyroid transcription factor 1 (TTF1), estrogen receptor-α (ER-α) and -β (ER-β), progesterone receptor (PR), androgen receptor (AR), BRAF and HER2. Results: In total 270 patients were screened between 2000 - 2017 and 92 patient’s material were sufficient for TMA analysis. Subgroup analysis showed 32 pancreatic, 37 ileum, 10 duodenum, 7 appendix, 3 colorectal, 3 gastric and 1 NET of gallbladder. 50% were male, the median age 63.5 years (range 19-8...

Research paper thumbnail of Molecular detection of hepatitis E virus (HEV) in liver biopsies after liver transplantation

Research paper thumbnail of Data from The Stem Cell Factor <i>HMGA2</i> Is Expressed in Non-HPV–Associated Head and Neck Squamous Cell Carcinoma and Predicts Patient Survival of Distinct Subsites

Research paper thumbnail of Supplementary figure 2 from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

Research paper thumbnail of Supplementary table 1 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Research paper thumbnail of Data from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

Murine liver tumors often fail to recapitulate the complexity of human hepatocellular carcinoma (... more Murine liver tumors often fail to recapitulate the complexity of human hepatocellular carcinoma (HCC), which might explain the difficulty to translate preclinical mouse studies into clinical science. The aim of this study was to evaluate a subtyping approach for murine liver cancer models with regard to etiology-defined categories of human HCC, comparing genomic changes, histomorphology, and IHC profiles. Sequencing and analysis of gene copy-number changes [by comparative genomic hybridization (CGH)] in comparison with etiology-dependent subsets of HCC patients of The Cancer Genome Atlas (TCGA) database were conducted using specimens (75 tumors) of five different HCC mouse models: diethylnitrosamine (DEN) treated wild-type C57BL/6 mice, c-Myc and AlbLTαβ transgenic mice as well as TAK1LPC-KO and Mcl-1Δhep mice. Digital microscopy was used for the assessment of morphology and IHC of liver cell markers (A6-CK7/19, glutamine synthetase) in mouse and n = 61 human liver tumors. Tumor CGH...

Research paper thumbnail of Supplementary figure 1 from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

• Expansive growth • Distorted lobular architecture • Compromiszed Collagen IV patterns • maligna... more • Expansive growth • Distorted lobular architecture • Compromiszed Collagen IV patterns • malignant cytological features (e.g. cellular atypia, clear cells, inclusions)

Research paper thumbnail of Supplementary figure 2 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 2. Kaplan Meier curves

Research paper thumbnail of Supplementary figure 1 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 1. quantification of reading Errors

Research paper thumbnail of Supplementary figure 5 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 5. Staining intensities AFP, CD44 and EpCam

Research paper thumbnail of Supplementary table 2 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary table 2. Immune phenotypes of morphological defined Tumor areas

Research paper thumbnail of Supplementary figure 4 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 4. detailed case description Patient 1 and 22

Research paper thumbnail of Supplementary figure 3 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 3. CK7 Expression patterns

Research paper thumbnail of Data from Intratumor Heterogeneity in Hepatocellular Carcinoma

Purpose: Morphologic intratumor heterogeneity is well known to exist in hepatocellular carcinoma ... more Purpose: Morphologic intratumor heterogeneity is well known to exist in hepatocellular carcinoma (HCC), but very few systematic analyses of this phenomenon have been performed. The aim of this study was to comprehensively characterize morphologic intratumor heterogeneity in HCC. Also, taken into account were well-known immunohistochemical markers and molecular changes in liver cells that are considered in proposed classifications of liver cell neoplasms or discussed as molecular therapeutic targets.Experimental Design: In HCC of 23 patients without medical pretreatment, a total of 120 tumor areas were defined. Analyzed were cell and tissue morphology, expression of the liver cell markers cytokeratin (CK)7, CD44, α-fetoprotein (AFP), epithelial cell adhesion molecule (EpCAM), and glutamine synthetase (GS) along with mutations of TP53 and CTNNB1, assayed by both Sanger and next-generation sequencing.Results: Overall, intratumor heterogeneity was detectable in the majority of HCC cases...

Research paper thumbnail of Impact of the PI3K-alpha inhibitor alpelisib on everolimus resistance and somatostatin receptor expression in an orthotopic pancreatic NEC xenograft mouse model

Endocrine-related Cancer, Nov 8, 2023

Research paper thumbnail of Supplementary figure 2 from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

non-tumorous murine livers

Research paper thumbnail of Immunohistochemical biomarker expression in gastro-entero-pancreatic neuroendocrine tumors at ENETS Centre of Excellence, University Hospital Zurich, Switzerland

Journal of Clinical Oncology, May 20, 2020

e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous t... more e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous tumor entity with respect to biological behaviour and prognosis. Definition of new predictive and prognostic biomarkers as well as new therapy targets are of upmost clinical interest. Methods: At the ENETS CoE Zurich tissue microarray (TMA) blocks were constructed with 147 tissue samples of tumors diagnosed from 2000 to 2017, including primary tumors and metastasis. Tissue microarray sections were immunostained for SOX-9, SOX-10, SSTR-2 +, PDL-1, thyroid transcription factor 1 (TTF1), estrogen receptor-α (ER-α) and -β (ER-β), progesterone receptor (PR), androgen receptor (AR), BRAF and HER2. Results: In total 270 patients were screened between 2000 - 2017 and 92 patient’s material were sufficient for TMA analysis. Subgroup analysis showed 32 pancreatic, 37 ileum, 10 duodenum, 7 appendix, 3 colorectal, 3 gastric and 1 NET of gallbladder. 50% were male, the median age 63.5 years (range 19-88y). AR, ER-β, TTF1, PDL-1 and SOX10 was only present in a small number of NETs. HER2 and BRAF were negative in all samples. We found ER-α expression in 27.2%, 30% were PR positive and 67.4% showed SOX9 expression. Conclusions: We identified a frequent expression of new markers as SOX9, progesterone receptor and estrogen receptor-α in a broad amount of samples and a potential correlation with tumor grade. This finding might implicate a prognostic or predictive value of these markers, as well as it reveals new potential therapy targets for GEP-NETs. Therefore, further analyses are planned.

Research paper thumbnail of Tumor im Dünndarm bei Peutz-Jeghers-Syndrom

Research paper thumbnail of Supplementary Table 2 from The Stem Cell Factor <i>HMGA2</i> Is Expressed in Non-HPV–Associated Head and Neck Squamous Cell Carcinoma and Predicts Patient Survival of Distinct Subsites

Research paper thumbnail of Supplementary Table 1 from The Stem Cell Factor <i>HMGA2</i> Is Expressed in Non-HPV–Associated Head and Neck Squamous Cell Carcinoma and Predicts Patient Survival of Distinct Subsites

Research paper thumbnail of Immunohistochemical biomarker expression in gastro-entero-pancreatic neuroendocrine tumors at ENETS Centre of Excellence, University Hospital Zurich, Switzerland

Journal of Clinical Oncology, 2020

e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous t... more e15673 Background: Gastro-entero-pancreatic neuroendocrine tumors (GEP-NET) are a heterogeneous tumor entity with respect to biological behaviour and prognosis. Definition of new predictive and prognostic biomarkers as well as new therapy targets are of upmost clinical interest. Methods: At the ENETS CoE Zurich tissue microarray (TMA) blocks were constructed with 147 tissue samples of tumors diagnosed from 2000 to 2017, including primary tumors and metastasis. Tissue microarray sections were immunostained for SOX-9, SOX-10, SSTR-2 +, PDL-1, thyroid transcription factor 1 (TTF1), estrogen receptor-α (ER-α) and -β (ER-β), progesterone receptor (PR), androgen receptor (AR), BRAF and HER2. Results: In total 270 patients were screened between 2000 - 2017 and 92 patient’s material were sufficient for TMA analysis. Subgroup analysis showed 32 pancreatic, 37 ileum, 10 duodenum, 7 appendix, 3 colorectal, 3 gastric and 1 NET of gallbladder. 50% were male, the median age 63.5 years (range 19-8...

Research paper thumbnail of Molecular detection of hepatitis E virus (HEV) in liver biopsies after liver transplantation

Research paper thumbnail of Data from The Stem Cell Factor <i>HMGA2</i> Is Expressed in Non-HPV–Associated Head and Neck Squamous Cell Carcinoma and Predicts Patient Survival of Distinct Subsites

Research paper thumbnail of Supplementary figure 2 from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

Research paper thumbnail of Supplementary table 1 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Research paper thumbnail of Data from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

Murine liver tumors often fail to recapitulate the complexity of human hepatocellular carcinoma (... more Murine liver tumors often fail to recapitulate the complexity of human hepatocellular carcinoma (HCC), which might explain the difficulty to translate preclinical mouse studies into clinical science. The aim of this study was to evaluate a subtyping approach for murine liver cancer models with regard to etiology-defined categories of human HCC, comparing genomic changes, histomorphology, and IHC profiles. Sequencing and analysis of gene copy-number changes [by comparative genomic hybridization (CGH)] in comparison with etiology-dependent subsets of HCC patients of The Cancer Genome Atlas (TCGA) database were conducted using specimens (75 tumors) of five different HCC mouse models: diethylnitrosamine (DEN) treated wild-type C57BL/6 mice, c-Myc and AlbLTαβ transgenic mice as well as TAK1LPC-KO and Mcl-1Δhep mice. Digital microscopy was used for the assessment of morphology and IHC of liver cell markers (A6-CK7/19, glutamine synthetase) in mouse and n = 61 human liver tumors. Tumor CGH...

Research paper thumbnail of Supplementary figure 1 from Characterization of HCC Mouse Models: Towards an Etiology-Oriented Subtyping Approach

• Expansive growth • Distorted lobular architecture • Compromiszed Collagen IV patterns • maligna... more • Expansive growth • Distorted lobular architecture • Compromiszed Collagen IV patterns • malignant cytological features (e.g. cellular atypia, clear cells, inclusions)

Research paper thumbnail of Supplementary figure 2 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 2. Kaplan Meier curves

Research paper thumbnail of Supplementary figure 1 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 1. quantification of reading Errors

Research paper thumbnail of Supplementary figure 5 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 5. Staining intensities AFP, CD44 and EpCam

Research paper thumbnail of Supplementary table 2 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary table 2. Immune phenotypes of morphological defined Tumor areas

Research paper thumbnail of Supplementary figure 4 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 4. detailed case description Patient 1 and 22

Research paper thumbnail of Supplementary figure 3 from Intratumor Heterogeneity in Hepatocellular Carcinoma

Supplementary figure 3. CK7 Expression patterns

Research paper thumbnail of Data from Intratumor Heterogeneity in Hepatocellular Carcinoma

Purpose: Morphologic intratumor heterogeneity is well known to exist in hepatocellular carcinoma ... more Purpose: Morphologic intratumor heterogeneity is well known to exist in hepatocellular carcinoma (HCC), but very few systematic analyses of this phenomenon have been performed. The aim of this study was to comprehensively characterize morphologic intratumor heterogeneity in HCC. Also, taken into account were well-known immunohistochemical markers and molecular changes in liver cells that are considered in proposed classifications of liver cell neoplasms or discussed as molecular therapeutic targets.Experimental Design: In HCC of 23 patients without medical pretreatment, a total of 120 tumor areas were defined. Analyzed were cell and tissue morphology, expression of the liver cell markers cytokeratin (CK)7, CD44, α-fetoprotein (AFP), epithelial cell adhesion molecule (EpCAM), and glutamine synthetase (GS) along with mutations of TP53 and CTNNB1, assayed by both Sanger and next-generation sequencing.Results: Overall, intratumor heterogeneity was detectable in the majority of HCC cases...