Homayounfar, Kia

[["dc.bibliographiccitation.journal","Oncology Research and Treatment"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Ruehlmann, Felix"],["dc.contributor.author","Nietert, Manuel M."],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Wolff, Hendrik Andreas"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Liersch, Torsten"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.date.accessioned","2018-11-07T09:34:12Z"],["dc.date.available","2018-11-07T09:34:12Z"],["dc.date.issued","2014"],["dc.identifier.isi","000343816900255"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32127"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Karger"],["dc.publisher.place","Basel"],["dc.title","SRC expression in locally advanced rectal cancer-before and after neoadjuvant chemoradiotherapy"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Journal of Clinical Oncology"],["dc.bibliographiccitation.volume","32"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Rothe, Hilka"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2018-11-07T09:45:05Z"],["dc.date.available","2018-11-07T09:45:05Z"],["dc.date.issued","2014"],["dc.identifier.isi","000333682100536"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34538"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Soc Clinical Oncology"],["dc.publisher.place","Alexandria"],["dc.relation.conference","Gastrointestinal Cancers Symposium"],["dc.relation.eventlocation","San Francisco, CA"],["dc.title","Residual rectal cancer after preoperative radiochemotherapy (ypT1-2): An indication for local excision instead of radical surgery?"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1283"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","American Journal of Surgical Pathology"],["dc.bibliographiccitation.lastpage","1289"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Rothe, Hilka"],["dc.contributor.author","Becker, Heinz"],["dc.contributor.author","Beissbarth, Tim"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Gauss, Korbinian"],["dc.contributor.author","Kitz, Julia"],["dc.contributor.author","Wolff, Hendrik"],["dc.contributor.author","Scheel, Andreas H."],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2021-06-01T10:47:01Z"],["dc.date.available","2021-06-01T10:47:01Z"],["dc.date.issued","2013"],["dc.identifier.doi","10.1097/PAS.0b013e3182886ced"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/85449"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-425"],["dc.relation.issn","0147-5185"],["dc.title","Lymph Node Metastases in Rectal Cancer After Preoperative Radiochemotherapy"],["dc.title.alternative","Impact of Intramesorectal Distribution and Residual Micrometastatic Involvement"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Onkologie"],["dc.bibliographiccitation.volume","36"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Quack, H."],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Wolff, Hendrik Andreas"],["dc.contributor.author","Binder, L."],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Bleckmann, Annalen"],["dc.contributor.author","Lorenzen, Stephan"],["dc.contributor.author","Nietert, Manuel M."],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2018-11-07T09:19:02Z"],["dc.date.available","2018-11-07T09:19:02Z"],["dc.date.issued","2013"],["dc.format.extent","73"],["dc.identifier.isi","000326360900167"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28546"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Karger"],["dc.publisher.place","Basel"],["dc.relation.issn","1423-0240"],["dc.relation.issn","0378-584X"],["dc.title","5-FU dose monitoring under neoadjuvant radiochemotherapy and adjuvant chemotherapy for locally advanced rectal cancer"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","400"],["dc.bibliographiccitation.issue","4_suppl"],["dc.bibliographiccitation.journal","Journal of Clinical Oncology"],["dc.bibliographiccitation.lastpage","400"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Gaedcke, Jochen"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Jo, Peter"],["dc.contributor.author","Jung, Klaus"],["dc.contributor.author","Beissbarth, Tim"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Ghadimi, B. Michael"],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2022-06-08T07:57:20Z"],["dc.date.available","2022-06-08T07:57:20Z"],["dc.date.issued","2013"],["dc.description.abstract","400 Background: The role of the potential stem cell marker CD133 as a predictive or prognostic marker in multimodal rectal cancer treatment is currently under debate. While CD133 has been identified as a prognostic marker in rectal cancers after preoperative radiochemotherapy (RCT) it was recently characterized as a very unspecific feature for colorectal cancer stem cells. We therefore analyzed the association between CD133 expression and mutations in the proto-oncogenes K-Ras and PI3K in rectal cancer patients receiving neoadjuvant RCT. Methods: CD133 expression was evaluated immunhistochemically in pre-treatment biopsies and surgical specimens of 128 patients with locally advanced rectal cancers (cUICC II/III) treated with preoperative RCT within the phase-III German Rectal Cancer Trials. K-Ras mutations were analyzed by sequencing of exons 1, 2, and 3. PI3K mutations were detected by sequencing the p110α subunit (PIK3CA) and correlated with histopathologic parameters, tumor regression and survival. Results: CD133 expression was significantly associated with mutations in the K-Ras gene in both pre-treatment biopsies and post-treatment tumor specimens in uni- and multivariate analyses. However, no significant correlation was observed between CD133 and PI3K mutations. Post-treatment CD133 levels were correlated with neoadjuvant RCT (50.4 Gy/5-FU vs. 50.4 Gy/5-FU+Ox) and tumor regression grading. Anyway, there was no significant association between pre- and post-treatment CD133 expression and disease-free survival. Conclusions: CD133 expression levels are strongly associated with mutations in the K-Ras proto-oncogene in rectal cancers before and after preoperative RCT. Our results strengthen the hypothesis that CD133 is not a specific marker for colorectal stem cells but might be integrated in proliferation pathways like the ras-raf axis."],["dc.identifier.doi","10.1200/jco.2013.31.4_suppl.400"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/110058"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-575"],["dc.relation.eissn","1527-7755"],["dc.relation.issn","0732-183X"],["dc.title","Association of CD133 expression levels with the k-ras mutation status in rectal cancers before and after preoperative radiochemotherapy."],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","522"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","American Journal of Surgical Pathology"],["dc.bibliographiccitation.lastpage","531"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Styczen, Hanna"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Wolff, Hendrik Andreas"],["dc.contributor.author","Roedel, Claus"],["dc.contributor.author","Nietert, Manuel M."],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Gaedcke, Jochen"],["dc.contributor.author","Kitz, Julia"],["dc.contributor.author","Talaulicar, Recca"],["dc.contributor.author","Becker, Heinz"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Middel, Peter"],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Rüschoff, Josef R."],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2018-11-07T09:26:46Z"],["dc.date.available","2018-11-07T09:26:46Z"],["dc.date.issued","2013"],["dc.description.abstract","In patients with advanced rectal cancer (cUICC II and III) multimodality therapy resulted in better long-term local tumor control. Ongoing clinical trials are focusing on therapy intensification to improve disease-free (DFS) and cancer-specific survival (CSS), the integration of biomarkers for prediction of individual recurrence risk, and the identification of new targets. In this context, we investigated HER-2, a member of the epidermal growth factor receptor family, whose expression pattern and role was unclear in rectal cancer. A total of 264 patients (192 male, 72 female; median age 64 y) received standardized multidisciplinary treatment according to protocols of phase II/III trials of the German Rectal Cancer Study Group. HER-2 status was determined in pretherapeutic biopsies and resection specimens using immunohistochemistry scoring and detection of silver in situ hybridization amplification. Tumors with an immunohistochemistry score of 3(+) or silver in situ hybridization ratios of >= 2.0 were classified HER-2 positive; these results were correlated with clinicopathologic parameters [eg, resection (R) status, nodal status ((y)pN)], DFS, and CSS. Positive HER-2 status was found in 12.4% of biopsies and in 26.7% of resected specimens. With a median follow-up of 46.5 months, patients with HER-2 positivity showed in trend a better DFS (P = 0.1) and a benefit in CSS (P = 0.03). The 5-year survival rate was 96.0% (HER-2 positive) versus 80.0% (HER-2 negative). In univariate and multivariate analyses, HER-2 was an independent predictor for CSS (0.02) along with the (y)pN status (P < 0.00001) and R status (P = 0.011). HER-2 amplification is detectable in a relevant proportion (26.7%) of rectal cancer patients. For the development of innovative new therapies, HER-2 may represent a promising target and should be further assessed within prospective clinical trials."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [KFO 179-2]"],["dc.identifier.doi","10.1097/PAS.0b013e318272ff4d"],["dc.identifier.isi","000316184000006"],["dc.identifier.pmid","23282976"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30374"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Lippincott Williams & Wilkins"],["dc.relation.issn","1532-0979"],["dc.relation.issn","0147-5185"],["dc.title","Frequency of HER-2 Positivity in Rectal Cancer and Prognosis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1229"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Journal of Cancer"],["dc.bibliographiccitation.lastpage","1237"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Rühlmann, Felix"],["dc.contributor.author","Nietert, Manuel M."],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Wolff, Hendrik Andreas"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Middel, Peter"],["dc.contributor.author","Bohnenberger, Hanibal"],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Liersch, Torsten"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.date.accessioned","2018-11-07T10:28:34Z"],["dc.date.available","2018-11-07T10:28:34Z"],["dc.date.issued","2017"],["dc.description.abstract","The cellular sarcoma gene (SRC) is a proto-oncogene encoding for a tyrosine kinase. SRC expression was determined in locally advanced rectal adenocarcinoma tissue from pretreatment biopsies and resection specimens. The expression level was correlated with clinicopathological parameters to evaluate the predictive and prognostic capacity. For this monocentric analysis 186 patients with locally advanced rectal cancer (median: 63.7 years; 130 men (69.9%), 56 women (30.1%)) were included. Patients with a carcinoma of the upper third of the rectum were treated with primary tumor resection (n=27; 14.5%). All other patients received a preoperative chemoradiotherapy (CRT) with 50.4 Gy and concomitant 5-fluorouracil (5-FU) or 5-FU+oxaliplatin followed by postoperative chemotherapy with 5-FU or 5-FU+ oxaliplatin. SRC expression was determined with immunohistochemical staining from pretreatment biopsies (n=152) and residual tumor tissue from the resection specimens (n=163). The results were correlated with clinicopathological parameters and long-term follow-up. The expression of SRC was determined in pretherapeutic biopsies (mean H-Score: 229) and resection specimens (mean H-Score: 254). High SRC expression in pretherapeutic tumor samples significantly correlated with a negative postoperative nodal status (p=0.005). Furthermore an increased protein expression in residual tumor tissue was associated with fewer distant metastases (p=0.04). The overexpression of SRC in pretreatment tumor biopsies showed also a trend for a longer cancer-specific survival (CSS; p=0.05) and fewer local relapses (p=0.06) during long-term follow-up. High SRC expression in rectal cancer seems to be associated with a better long-term outcome. This finding could help in the future to stratify patients for a recurrence risk adapted postoperative treatment."],["dc.identifier.doi","10.7150/jca.16980"],["dc.identifier.isi","000402474000015"],["dc.identifier.pmid","28607598"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14945"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43450"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Ivyspring Int Publ"],["dc.relation.issn","1837-9664"],["dc.rights","CC BY-NC 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc/4.0"],["dc.title","The Prognostic Value of Tyrosine Kinase SRC Expression in Locally Advanced Rectal Cancer"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Onkologie"],["dc.bibliographiccitation.volume","36"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Styczen, Hanna"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Wolff, Hendrik Andreas"],["dc.contributor.author","Middel, Peter"],["dc.contributor.author","Nagelmeier, I."],["dc.contributor.author","Rüschoff, Josef R."],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2018-11-07T09:19:05Z"],["dc.date.available","2018-11-07T09:19:05Z"],["dc.date.issued","2013"],["dc.format.extent","118"],["dc.identifier.isi","000326360900284"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28551"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Karger"],["dc.publisher.place","Basel"],["dc.relation.issn","1423-0240"],["dc.relation.issn","0378-584X"],["dc.title","HER-2 and HER-3 expression in locally advanced rectal cancer and metachronous metastases: new targets for treatment approaches?"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Journal of Clinical Oncology"],["dc.bibliographiccitation.volume","31"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Gaedcke, Jochen"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Jo, Peter"],["dc.contributor.author","Jung, Klaus"],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2018-11-07T09:28:52Z"],["dc.date.available","2018-11-07T09:28:52Z"],["dc.date.issued","2013"],["dc.identifier.isi","000333679000393"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/30890"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Soc Clinical Oncology"],["dc.publisher.place","Alexandria"],["dc.relation.conference","Gastrointestinal Cancers Symposium of the American-Society-of-Clinical-Oncology (ASCO)"],["dc.relation.eventlocation","San Francisco, CA"],["dc.relation.issn","1527-7755"],["dc.relation.issn","0732-183X"],["dc.title","Association of CD133 expression levels with the k-ras mutation status in rectal cancers before and after preoperative radiochemotherapy"],["dc.type","conference_abstract"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","26"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Cancer"],["dc.bibliographiccitation.lastpage","35"],["dc.bibliographiccitation.volume","119"],["dc.contributor.author","Sprenger, Thilo"],["dc.contributor.author","Conradi, Lena-Christin"],["dc.contributor.author","Beißbarth, Tim"],["dc.contributor.author","Ermert, Heiko"],["dc.contributor.author","Homayounfar, Kia"],["dc.contributor.author","Middel, Peter"],["dc.contributor.author","Rüschoff, Josef R."],["dc.contributor.author","Wolff, Hendrik Andreas"],["dc.contributor.author","Schueler, Philipp"],["dc.contributor.author","Ghadimi, Michael B."],["dc.contributor.author","Roedel, Claus"],["dc.contributor.author","Becker, Heinz"],["dc.contributor.author","Roedel, Franz"],["dc.contributor.author","Liersch, Torsten"],["dc.date.accessioned","2018-11-07T09:30:52Z"],["dc.date.available","2018-11-07T09:30:52Z"],["dc.date.issued","2013"],["dc.description.abstract","BACKGROUND: The transmembrane glycoprotein CD133 (cluster of differentiation 133; also known as Prominin or PROM1) has been described as a potential stem cell marker in colorectal cancer and is associated with higher tumorigenic potential and resistance to radiochemotherapy (RCT). In this study, CD133 expression was evaluated in pre-RCT tumor biopsies and the corresponding post-RCT surgical specimens from patients with locally advanced rectal adenocarcinoma, and expression levels were correlated with histopathologic features and clinical follow-up. METHODS: One hundred twenty-six patients with International Union Against Cancer (UICC) stage II/III rectal cancer who received preoperative 5-fluorouracil (5-FU)-based RCT within the German Rectal Cancer Trials were investigated. Pre-RCT and post-RCT CD133 expression levels were determined using immunohistochemistry and were correlated with histopathologic parameters, tumor regression grade, cancer recurrence, and patient survival. RESULTS: Compared with pre-RCT biopsies, significantly higher CD133 expression was observed in tumor specimens (P = .01). However, no correlations were observed for either biopsies or tumor specimens between CD133 expression levels, histopathologic characteristics, or survival. In matched analyses of corresponding biopsy/tumor pairs, patients who had an increased fraction of CD133-expressing (CD133+) cells after preoperative RCT had significantly higher residual tumor stages (P = .02) and lower histopathologic tumor regression (P < .01). Moreover, these patients had significantly reduced disease-free survival and cancer-specific overall survival in univariate analysis (P < .001 and P = .004, respectively) and multivariate analysis (P = .003 and P = .024, respectively). CONCLUSIONS: The enrichment of CD133+ cancer cells during preoperative RCT was correlated with minor local tumor response, increased distant cancer recurrence, and decreased survival. The current results indicate that the up-regulation of intratumoral CD133 expression, in contrast to absolute pre-RCT and post-RCT CD133 levels, plays an important role in tumor progression and metastasis in patients with rectal cancer who are receiving neoadjuvant RCT. Cancer 2013. (c) 2012 American Cancer Society."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [KFO 179]"],["dc.identifier.doi","10.1002/cncr.27703"],["dc.identifier.isi","000312543000007"],["dc.identifier.pmid","22736392"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31411"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","0008-543X"],["dc.title","Enrichment of CD133-expressing cells in rectal cancers treated with preoperative radiochemotherapy is an independent marker for metastasis and survival"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]