26
|
Schwartzberg L, Roeland E, Andric Z, Kowalski D, Radic J, Voisin D, Rizzi G, Navari R, Gralla R, Karthaus M. Phase III safety study of intravenous NEPA: a novel fixed antiemetic combination of fosnetupitant and palonosetron in patients receiving highly emetogenic chemotherapy. Ann Oncol 2018; 29:1535-1540. [DOI: 10.1093/annonc/mdy169] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
27
|
Scorilas A, Markakis S, Kowalski D, Camp RL, Diamandis EP, Dimopoulos MA, Kountourakis P, Psyrri A. Expression and prognostic significance of kallikrein-related peptidase 8 protein levels in advanced ovarian cancer by using automated quantitative analysis. Thromb Haemost 2017. [DOI: 10.1160/th08-01-0052] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryKallikrein-related peptidases, a subgroup of the serine protease enzyme family, are considered to be important prognostic biomarkers in cancer. In this study we sought to determine the prognostic value of kallikrein-related peptidase 8 (KLK8,hK8,KLK-8) in ovarian cancer using a novel method of compartmentalised in situ protein analysis. A tissue array composed of 150 advanced stage ovarian cancers, uniformly treated with surgical debulking followed by platinum-paclitaxel combination chemotherapy, was constructed. For the evaluation of kallikrein-related peptidase 8 protein expression, we used an immunofluorescence-based method of automated in situ quantitative protein analysis (AQUA). Mean follow-up time of the cohort was 34.35 months. One hundred twenty-six of 150 cases had sufficient tissue for AQUA analysis. There were significant correlations between tumour mask KLK8 protein expression levels and clinicopathological variables, including grade (p=0.0011), residual disease (p=0.0063) and clinical response to chemotherapy(p=0.0346). In univariate survival analysis there was a significant correlation between KLK8 tumour mask expression and five years progression-free survival, meanwhile it was not associated with five-year overall survival (p =0.0694). Specifically, low KLK8 expression correlated with better outcome (top vs. bottom quartile, p=0.0319). In multivariate survival analysis, adjusting for well-characterised prognostic variables, tumour KLK8 expression level retained its prognostic significance for progression-free survival (95%CI: 0.341–1.027, p=0.045). The possibility that KLK8 may be a suitable candidate as a diagnostic and prognostic marker warrants further investigation.
Collapse
|
28
|
Schwartzberg L, Andric Z, Kowalski D, Voisin D, Rizzi G, Karthaus M. Phase 3 safety evaluation of an intravenous formulation of NEPA, a novel fixed antiemetic combination of fosnetupitant and palonosetron. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx388.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
29
|
Keirns J, Desai A, Kowalski D, Lademacher C, Mujais S, Parker B, Schneidkraut MJ, Townsend R, Wojtkowski T, Yamazaki T, Yen M, Kowey PR. QT Interval Shortening With Isavuconazole: In Vitro and In Vivo Effects on Cardiac Repolarization. Clin Pharmacol Ther 2017; 101:782-790. [PMID: 28074556 PMCID: PMC5485736 DOI: 10.1002/cpt.620] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2017] [Indexed: 01/17/2023]
Abstract
The effects of isavuconazole (active moiety of isavuconazonium sulfate) on cardiac ion channels in vitro and cardiac repolarization clinically were assessed in a phase I, randomized, double-blind study in healthy individuals who received isavuconazole (after 2-day loading dose), at therapeutic or supratherapeutic doses daily for 11 days, moxifloxacin (400 mg q.d.), or placebo. A post-hoc analysis of the phase III SECURE trial assessed effects on cardiac safety. L-type Ca2+ channels were most sensitive to inhibition by isavuconazole. The 50% inhibitory concentrations for ion channels were higher than maximum serum concentrations of nonprotein-bound isavuconazole in vivo. In the phase I study (n = 161), isavuconazole shortened the QT interval in a dose- and plasma concentration-related manner. There were no serious treatment-emergent adverse events; palpitations and tachycardia were observed in placebo and supratherapeutic isavuconazole groups; no cardiac safety signals were detected in the SECURE study (n = 257). Isavuconazole was associated with a shortened cardiac QT interval.
Collapse
|
30
|
Schütte W, Barlesi F, Park K, Ciardiello F, Pawel J, Gadgeel S, Hida T, Kowalski D, Cobo Dols M, Cortinovis D, Leach J, Polikoff J, Gandara DR, Barrios C, Chen DS, He P, Ballinger M, Waterkamp D, Sandler A, Rittmeyer A. Efficacy, safety and predictive biomarker results from OAK, a randomized phase III study comparing atezolizumab with docetaxel in patients with advanced NSCLC. Pneumologie 2017. [DOI: 10.1055/s-0037-1598278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
31
|
Park K, Barlesi F, Ciardiello F, von Pawel J, Gadgeel S, Hida T, Kowalski D, Cobo Dols M, Cortinovis D, Leach J, Polikoff J, Gandara D, Barrios C, Chen D, He P, Kowanetz M, Ballinger M, Waterkamp D, Sandler A, Rittmeyer A. 438O Primary analysis from OAK, a randomized phase III study comparing atezolizumab with docetaxel in 2L/3L NSCLC. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw594.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
32
|
Tan EH, Banna G, Ramlau R, Ceresoli G, Camerini A, Milanowski J, Caruso M, Landreau P, Vedovato JC, Kowalski D. Final results of a phase II study of oral vinorelbine (NVBo) monotherapy in patients (pts) with advanced EGFR-positive non-small-cell lung cancer (NSCLC) after failure of EGFR-TKI in first line (NAVoTRIAL 2). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw383.84] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
33
|
Barlesi F, Park K, Ciardiello F, von Pawel J, Gadgeel S, Hida T, Kowalski D, Dols M, Cortinovis D, Leach J, Polikoff J, Gandara D, Barrios C, Chen D, He P, Kowanetz M, Ballinger M, Waterkamp D, Sandler A, Rittmeyer A. Primary analysis from OAK, a randomized phase III study comparing atezolizumab with docetaxel in 2L/3L NSCLC. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw435.43] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
34
|
Powrózek T, Krawczyk P, Kowalski D, Kuźnar-Kamińska B, Winiarczyk K, Olszyna-Serementa M, Batura-Gabryel H, Milanowski J. 30PD Novel plasma circulating microRNA signature for early detection of non-small cell lung cancer in liquid biopsy. J Thorac Oncol 2016. [DOI: 10.1016/s1556-0864(16)30144-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
35
|
Baldassarri R, Aronberg R, Levi AW, Yarbrough WG, Kowalski D, Chhieng D. Detection and genotype of high-risk human papillomavirus in fine-needle aspirates of patients with metastatic squamous cell carcinoma is helpful in determining tumor origin. Am J Clin Pathol 2015; 143:694-700. [PMID: 25873503 DOI: 10.1309/ajcpcza4pszcfhq4] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVES Recent studies have shown that human papillomavirus (HPV) is associated with a certain subset of head and neck squamous cell carcinoma (HNSCC)-namely, those arising in the oropharynx. The objective of this study is to determine the efficacy, detection, and genotype of high-risk (HR) HPV using the Roche cobas 4800 system (Roche Molecular System, Pleasanton, CA). METHODS Forty-two fine-needle aspirate (FNA) specimens from 37 patients with cervical (n = 36) or mediastinal (n = 5) lymphadenopathy or a left parapharyngeal mass (n =1) were included in this prospective study. HR-HPV testing was performed on residual FNA material after direct smear preparation and, if positive, was further delineated into HPV 16/18 genotypes using the Roche cobas 4800 system. Follow-up included review of histologic material and/or electronic health records. RESULTS Among those HNSCCs that were positive for HR-HPV, 18 (100%) of 18 originated from the oropharynx, whereas only two (13%) of 15 HR-HPV-negative HNSCCs originated from the oropharynx (χ(2) test, P < .05). p16 immunohistochemical assay and HPV 16 in situ hybridization on corresponding histologic specimens were concordant with cytologic HR-HPV results. CONCLUSIONS HR-HPV detection and genotyping can be performed on lymph node FNAs with metastatic squamous cell carcinoma using the Roche cobas 4800 system. The presence of HR-HPV and/or HPV 16 is a reliable indicator of the metastatic squamous cell carcinoma originating from the oropharynx.
Collapse
|
36
|
Krzakowski M, Bennouna J, Dansin E, Kowalski D, Hiret S, Penel N, Favrel S, Tourani JM. Phase I dose-escalation study of oral vinflunine in combination with erlotinib in pre-treated and unselected EGFR patients with locally advanced or metastatic non-small-cell lung cancer. Cancer Chemother Pharmacol 2013; 73:231-6. [PMID: 24220936 PMCID: PMC3909260 DOI: 10.1007/s00280-013-2342-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 10/25/2013] [Indexed: 11/26/2022]
Abstract
Background Erlotinib, the epidermal growth factor receptor tyrosine kinase inhibitor, and the intra-venous vinflunine vinca alkaloid microtubule inhibitor have been shown to be effective in the setting of non-small-cell lung cancer (NSCLC) palliative patients with acceptable toxicities. This phase I study was conducted to determine the maximal tolerated dose (MTD) and the safety of an all-oral combination. A potential pharmacokinetic drug–drug interaction was also investigated.
Patients and methods Patients with unresectable stage IIIB or stage IV NSCLC who failed one or two previous chemotherapy regimens were treated with flat doses of oral vinflunine from day 1 to day 5 and from day 8 to day 12 every 3 weeks and erlotinib daily on a continuous basis. The dose levels of vinflunine/erlotinib were 95/100, 115/100, 115/150 and 135/100 mg. Results Thirty patients were enroled. The recommended dose was 115/150 mg and the MTD 135/100 mg. Dose-limiting toxicities included grade 3 febrile neutropenia (1 patient) and related death (1 patient). Non-haematologic grade 3/4 toxicities included fatigue, condition aggravated, hypokalaemia, tumour pain, acneiform dermatitis, diarrhoea, hyperbilirubinaemia and pulmonary haemorrhage, in one patient each. Of 25 patients evaluable for tumour response, 2 patients had partial response and 20 patients had stable disease. Conclusion The recommended doses for oral vinflunine and erlotinib combination were, respectively, 115 mg/day from day 1 to day 5 and from day 8 to day 12 every 3 weeks and 150 mg/day. There was no mutual impact on pharmacokinetics. The combination was safe but evaluation in phase II is needed to further refine the activity and toxicity that can be expected with prolonged administration of this dose schedule.
Collapse
|
37
|
Reid S, Lu C, Casikar I, Reid G, Abbott J, Cario G, Chou D, Kowalski D, Cooper M, Condous G. Prediction of pouch of Douglas obliteration in women with suspected endometriosis using a new real-time dynamic transvaginal ultrasound technique: the sliding sign. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2013; 41:685-691. [PMID: 23001892 DOI: 10.1002/uog.12305] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/20/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To evaluate preoperative real-time dynamic transvaginal sonography (TVS) in the prediction of pouch of Douglas (POD) obliteration in women undergoing laparoscopy for suspected endometriosis. METHODS This was a multicenter prospective observational study undertaken from January 2009 to November 2011. All women with symptoms suggestive of endometriosis who were scheduled for laparoscopy underwent detailed preoperative TVS, in particular to ascertain whether the POD was obliterated. POD obliteration was assessed using a real-time TVS technique called the 'sliding sign'. Preoperative TVS sliding sign findings were then compared to gold standard laparoscopic POD findings. RESULTS One hundred consecutive women with preoperative TVS and laparoscopic outcomes were included in the final analysis. Mean age was 32.8 years and mean age at diagnosis of endometriosis was 27.4 years. At laparoscopy, 84/100 (84%) were found to have some form of endometriosis (73% peritoneal endometriosis, 35% ovarian endometrioma(s), 33% deep infiltrating endometriosis). At laparoscopy, 30/100 (30%) had an obliterated POD and 19/30 (63.3%) of these women also had evidence of bowel endometriosis. The sonographic sliding sign technique had an accuracy of 93.0%, sensitivity of 83.3%, specificity of 97.1%, positive predictive value of 92.6%, negative predictive value of 93.2%, positive likelihood ratio of 29.2 and negative likelihood ratio of 0.17 in the prediction of POD obliteration (P = 1.8E-16). CONCLUSIONS Preoperative real-time dynamic TVS evaluation using the sliding sign seems to establish with a high degree of certainty whether the POD is obliterated. Given the increased risk of deep infiltrating endometriosis in women with POD obliteration, the TVS sliding sign technique may also be useful in the identification of women who may be at a higher risk for bowel endometriosis.
Collapse
|
38
|
Goldwater R, Keirns J, Blahunka P, First R, Sawamoto T, Zhang W, Kowalski D, Kaibara A, Holman J. A phase 1, randomized ascending single-dose study of antagonist anti-human CD40 ASKP1240 in healthy subjects. Am J Transplant 2013; 13:1040-1046. [PMID: 23356210 DOI: 10.1111/ajt.12082] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2012] [Revised: 12/03/2012] [Accepted: 12/06/2012] [Indexed: 01/25/2023]
Abstract
This first-in-human, phase I study evaluated the safety, tolerability, pharmacokinetic and pharmacodynamic profile of ASKP1240 in healthy subjects. Twelve sequential groups (each 6 active and 3 placebo) were randomly assigned to placebo or single ascending doses of intravenous ASKP1240 (0.00003-10 mg/kg). ASKP1240 exhibited nonlinear pharmacokinetics, with mean maximal serum concentrations and area under the serum concentration-time curves ranging from 0.7 to 251.6 μg/mL and 6.5 to 55409.6 h·μg/mL following doses 0.1 mg/kg-10 mg/kg, respectively. CD40 receptor occupancy by ASKP1240, which was dose-dependent, reached a maximum at doses above 0.01 mg/kg. ASKP1240 was well tolerated, with no evidence of cytokine release syndrome or thromboembolic events. Treatment emergent antibodies to ASKP1240 were detected in 5/70 (7.1%) ASKP1240 recipients. In conclusion, antagonism of the CD40/CD154 interaction with ASKP1240 was safe and well tolerated at the doses tested.
Collapse
|
39
|
Goldwater R, Keirns J, Blahunka P, First R, Sawamoto T, Zhang W, Kowalski D, Kaibara A, Holman J. A phase 1, randomized ascending single-dose study of antagonist anti-human CD40 ASKP1240 in healthy subjects. Am J Transplant 2013. [PMID: 23356210 DOI: 10.1111/ajt.12082.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
This first-in-human, phase I study evaluated the safety, tolerability, pharmacokinetic and pharmacodynamic profile of ASKP1240 in healthy subjects. Twelve sequential groups (each 6 active and 3 placebo) were randomly assigned to placebo or single ascending doses of intravenous ASKP1240 (0.00003-10 mg/kg). ASKP1240 exhibited nonlinear pharmacokinetics, with mean maximal serum concentrations and area under the serum concentration-time curves ranging from 0.7 to 251.6 μg/mL and 6.5 to 55409.6 h·μg/mL following doses 0.1 mg/kg-10 mg/kg, respectively. CD40 receptor occupancy by ASKP1240, which was dose-dependent, reached a maximum at doses above 0.01 mg/kg. ASKP1240 was well tolerated, with no evidence of cytokine release syndrome or thromboembolic events. Treatment emergent antibodies to ASKP1240 were detected in 5/70 (7.1%) ASKP1240 recipients. In conclusion, antagonism of the CD40/CD154 interaction with ASKP1240 was safe and well tolerated at the doses tested.
Collapse
|
40
|
von Pawel J, Gorbounova V, Reck M, Kowalski D, Allard A, Chadjaa M, Rey A, Bennouna J, Grossi F. Disrupt: A Randomized Phase 2 Trial of Ombrabulin (AVE8062) Combined with a Taxane-Platinum Regimen in the First-Line Treatment of Metastatic Non-Small Cell Lung Cancer (NSCLC). Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33843-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
41
|
Horne MJ, Chhieng DC, Theoharis C, Schofield K, Kowalski D, Prasad ML, Hammers L, Udelsman R, Adeniran AJ. Thyroid follicular lesion of undetermined significance: Evaluation of the risk of malignancy using the two-tier sub-classification. Diagn Cytopathol 2011; 40:410-5. [DOI: 10.1002/dc.21790] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/06/2011] [Accepted: 06/22/2011] [Indexed: 01/21/2023]
|
42
|
Levi AW, Chhieng DC, Schofield K, Kowalski D, Harigopal M. Implementation of FocalPoint GS location-guided imaging system. Cancer Cytopathol 2011; 120:126-33. [DOI: 10.1002/cncy.20187] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 06/16/2011] [Accepted: 06/20/2011] [Indexed: 12/11/2022]
|
43
|
Nagarajan P, Cai G, Padda MS, Selbst M, Kowalski D, Proctor DD, Chhieng D, Aslanian HR, Harigopal M. Littoral cell angioma of the spleen diagnosed by endoscopic ultrasound-guided fine-needle aspiration biopsy. Diagn Cytopathol 2011; 39:318-22. [PMID: 21488173 DOI: 10.1002/dc.21384] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Littoral cell angiomas are uncommon primary vascular neoplasms that arise from the sinusoidal lining or littoral cells of the splenic red pulp, and hence are unique to the spleen. We report a case of littoral cell angioma in 34-year-old woman, which was diagnosed by endoscopic ultrasound-guided fine needle aspiration biopsy (EUS-FNAB). The cytologic features of littoral cell angiomas have been described only in three previous case reports, one of which was a bench-top aspirate. In our case, we have utilized the fine-needle aspiration samples obtained by a linear endoscopic ultrasound examination for establishing the diagnosis. The characteristic cytologic features identified on the smears along with immunohistochemical analysis performed on the compact cellblock prepared from the aspirate aided in the confirmation of the diagnosis. We suggest that EUS-FNAB is a safe and reliable method in the diagnosis of vascular lesions of the spleen.
Collapse
|
44
|
Garcia-Vergara SJ, Molchan IS, Zhou F, Habazaki H, Kowalski D, Skeldon P, Thompson GE. Incorporation and migration of phosphorus species within anodic films on an Al-W alloy. SURF INTERFACE ANAL 2011. [DOI: 10.1002/sia.3651] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
45
|
Pectasides E, Rampias T, Kountourakis P, Sasaki C, Kowalski D, Fountzilas G, Zaramboukas T, Rimm D, Burtness B, Psyrri A. Comparative prognostic value of epidermal growth factor quantitative protein expression compared with FISH for head and neck squamous cell carcinoma. Clin Cancer Res 2011; 17:2947-54. [PMID: 21355076 DOI: 10.1158/1078-0432.ccr-10-2040] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Epidermal growth factor receptor (EGFR) overexpression correlates with recurrence and with treatment resistance in head and neck squamous cell carcinoma (HNSCC). The aim of this study was to evaluate the relationship of EGFR gene copy number utilizing FISH and protein expression with automated quantitative analysis (AQUA) and to correlate those with patient outcome. EXPERIMENTAL DESIGN A tissue microarray composed of 102 HNSCC treated with (chemo)radiation was constructed and analyzed for EGFR copy number by FISH (Vysis; Abbott Laboratories) and EGFR protein expression using AQUA analysis of EGFR staining scored on a scale of 0 to 255. We evaluated associations of EGFR FISH status and AQUA score with clinicopathologic parameters and survival prognosis. RESULTS Eleven (17.2%) of 64 tumors with FISH results showed EGFR high polysomy and/or gene amplification (FISH positive). Protein levels assessed by AQUA in FISH-positive cases were significantly higher (P = 0.04) than in FISH-negative cases. Using the continuous AQUA scores for EGFR expression, AQUA and FISH showed significant agreement (Pearson's ρ = 0.353, P = 0.04). Patients with high tumor EGFR protein expression had inferior 5-year overall survival (27.7%) compared with those with low tumor EGFR expression (54%; P = 0.029). There was no significant association between EGFR FISH status and overall survival (P = 0.201). In the multivariate model, high tumor EGFR protein expression status remained an independent prognostic factor for overall survival (P = 0.047). CONCLUSIONS EGFR protein content correlates with gene copy number if protein content is quantitated and automatically analyzed, as with AQUA. EGFR protein levels assessed by AQUA strongly predict for patient outcome in HNSCC, whereas EGFR FISH status does not provide prognostic information.
Collapse
|
46
|
Weinberger PM, Yu Z, Kountourakis P, Sasaki C, Haffty BG, Kowalski D, Merkley MA, Rimm DL, Camp RL, Psyrri A. Defining molecular phenotypes of human papillomavirus-associated oropharyngeal squamous cell carcinoma: validation of three-class hypothesis. Otolaryngol Head Neck Surg 2009; 141:382-9. [PMID: 19716018 DOI: 10.1016/j.otohns.2009.04.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2008] [Revised: 02/25/2009] [Accepted: 04/16/2009] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The purpose of this study was to determine if oropharyngeal squamous cell carcinoma (OSCC) classified into three groups based on human papillomavirus (HPV) 16 DNA presence and p16 expression display different protein expression patterns. STUDY DESIGN Cross-sectional study. SETTING A laboratory-based study of patients with OSCC treated at a tertiary care academic medical center. SUBJECTS AND METHODS Paraffin-embedded OSCC specimens from 77 patients classified into the three-class model (HPV negative, HPV inactive [HPV16+/p16-], and HPV active [HPV16+/p16+]) were queried for the expression of 14 tumor progression proteins using AQUA (HistoRx, New Haven CT). Protein expression between groups was assessed by analysis of variance. Global expression patterns were determined by unsupervised hierarchical clustering. RESULTS There were significant differences in expression of beta-catenin (P = 0.009), epidermal growth factor receptor (P = 0.009), and vascular endothelial growth factor (P = 0.028) between groups. HPV-active tumors had overexpression of beta-catenin. Hierarchical clustering showed HPV-negative and HPV-inactive tumors displayed association patterns distinct from HPV-active tumors. CONCLUSIONS Tumors classified by HPV DNA presence and p16 expression have different molecular phenotypes. This is the first demonstration of overexpression of beta-catenin (also found in HPV-caused cervical cancer) in HPV-active OSCC. HPV-active OSCC may share a similar ontogeny to HPV-caused cervical cancer.
Collapse
|
47
|
Szpakowski S, Sun X, Lage JM, Dyer A, Rubinstein J, Kowalski D, Sasaki C, Costa J, Lizardi PM. Loss of epigenetic silencing in tumors preferentially affects primate-specific retroelements. Gene 2009; 448:151-67. [PMID: 19699787 DOI: 10.1016/j.gene.2009.08.006] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 07/19/2009] [Accepted: 08/06/2009] [Indexed: 12/18/2022]
Abstract
Close to 50% of the human genome harbors repetitive sequences originally derived from mobile DNA elements, and in normal cells, this sequence compartment is tightly regulated by epigenetic silencing mechanisms involving chromatin-mediated repression. In cancer cells, repetitive DNA elements suffer abnormal demethylation, with potential loss of silencing. We used a genome-wide microarray approach to measure DNA methylation changes in cancers of the head and neck and to compare these changes to alterations found in adjacent non-tumor tissues. We observed specific alterations at thousands of small clusters of CpG dinucleotides associated with DNA repeats. Among the 257,599 repetitive elements probed, 5% to 8% showed disease-related DNA methylation alterations. In dysplasia, a large number of local events of loss of methylation appear in apparently stochastic fashion. Loss of DNA methylation is most pronounced for certain members of the SVA, HERV, LINE-1P, AluY, and MaLR families. The methylation levels of retrotransposons are discretely stratified, with younger elements being highly methylated in healthy tissues, while in tumors, these young elements suffer the most dramatic loss of methylation. Wilcoxon test statistics reveals that a subset of primate LINE-1 elements is demethylated preferentially in tumors, as compared to non-tumoral adjacent tissue. Sequence analysis of these strongly demethylated elements reveals genomic loci harboring full length, as opposed to truncated elements, while possible enrichment for functional LINE-1 ORFs is weaker. Our analysis suggests that, in non-tumor adjacent tissues, there is generalized and highly variable disruption of epigenetic control across the repetitive DNA compartment, while in tumor cells, a specific subset of LINE-1 retrotransposons that arose during primate evolution suffers the most dramatic DNA methylation alterations.
Collapse
|
48
|
Kountourakis P, Psyrri A, Scorilas A, Markakis S, Kowalski D, Camp RL, Diamandis EP, Dimopoulos MA. Expression and prognostic significance of kallikrein-related peptidase 8 protein levels in advanced ovarian cancer by using automated quantitative analysis. Thromb Haemost 2009; 101:541-546. [PMID: 19277417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Kallikrein-related peptidases, a subgroup of the serine protease enzyme family, are considered to be important prognostic biomarkers in cancer. In this study we sought to determine the prognostic value of kallikrein-related peptidase 8 (KLK8, hK8, KLK-8) in ovarian cancer using a novel method of compartmentalised in situ protein analysis. A tissue array composed of 150 advanced stage ovarian cancers, uniformly treated with surgical debulking followed by platinum-paclitaxel combination chemotherapy, was constructed. For the evaluation of kallikrein-related peptidase 8 protein expression, we used an immunofluorescence-based method of automated in situ quantitative protein analysis (AQUA). Mean follow-up time of the cohort was 34.35 months. One hundred twenty-six of 150 cases had sufficient tissue for AQUA analysis. There were significant correlations between tumour mask KLK8 protein expression levels and clinicopathological variables, including grade (p = 0.0011), residual disease (p = 0.0063) and clinical response to chemotherapy(p = 0.0346). In univariate survival analysis there was a significant correlation between KLK8 tumour mask expression and five years progression-free survival, meanwhile it was not associated with five-year overall survival (p = 0.0694). Specifically, low KLK8 expression correlated with better outcome (top vs. bottom quartile, p = 0.0319). In multivariate survival analysis, adjusting for well-characterised prognostic variables, tumour KLK8 expression level retained its prognostic significance for progression-free survival (95%CI: 0.341-1.027, p = 0.045). The possibility that KLK8 may be a suitable candidate as a diagnostic and prognostic marker warrants further investigation.
Collapse
|
49
|
Kountourakis P, Psyrri A, Scorilas A, Camp R, Markakis S, Kowalski D, Diamandis EP, Dimopoulos MA. Prognostic value of kallikrein-related peptidase 6 protein expression levels in advanced ovarian cancer evaluated by automated quantitative analysis (AQUA). Cancer Sci 2008; 99:2224-9. [PMID: 18957059 PMCID: PMC11159123 DOI: 10.1111/j.1349-7006.2008.00942.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Kallikrein-related peptidases, a subgroup of the serine protease enzyme family, are considered important prognostic biomarkers in cancer. In the present study, we sought to determine the prognostic value of kallikrein-related peptidase 6 (KLK6) in ovarian cancer using a novel method of compartmentalized in situ protein analysis. A tissue array composed of 150 advanced stage ovarian cancers, uniformly treated with surgical debulking followed by platinum-paclitaxel combination chemotherapy, was constructed. For evaluation of KLK6 protein expression, we used an immunofluorescence-based method of automated in situ quantitative measurement of protein analysis (AQUA). Mean follow-up time of the cohort was 34.35 months. One hundred and thirty-five of 150 cases had sufficient tissue for AQUA analysis. In univariate survival analysis, low tumor KLK6 expression was associated with better outcome for overall survival over 3 years (P = 0.019). There was no association between tumor KLK6 expression and progression-free survival (P = 0.128). In multivariate survival analysis, adjusting for well-characterized prognostic variables, low tumor KLK6 expression level was one of the most significant predictor variable for overall survival (95% confidence interval, 1.19-3.50; P = 0.009). High tumor KLK6 protein expression is associated with inferior patient outcome in ovarian cancer. KLK6 may represent a promising disease biomarker and therapeutic target in ovarian cancer.
Collapse
|
50
|
Psyrri A, Egleston B, Weinberger P, Yu Z, Kowalski D, Sasaki C, Haffty B, Rimm D, Burtness B. Correlates and determinants of nuclear epidermal growth factor receptor content in an oropharyngeal cancer tissue microarray. Cancer Epidemiol Biomarkers Prev 2008; 17:1486-92. [PMID: 18559565 DOI: 10.1158/1055-9965.epi-07-2684] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND We have previously reported nuclear localization of epidermal growth factor receptor (EGFR) protein in oropharyngeal cancer tissue. Nuclear EGFR levels were inversely correlated with survival and response to radiotherapy. Here, we sought to identify the determinants and correlates of nuclear EGFR content. METHODS We analyzed an oropharyngeal cancer tissue microarray for the expression of the key molecules of the EGFR signaling cascade using an automated image analysis technique (AQUA) scored on a scale of 0 to 255, which permits protein quantitation and subcellular localization. Patients with oropharyngeal squamous cell cancer treated with radiotherapy or surgery and radiotherapy were eligible. Data were analyzed using Spearman correlations and multiple linear regression with robust SEs. RESULTS Of the 95 tumors included in this study, 72 (75%) had sufficient tissue for analysis of nuclear EGFR. Nuclear EGFR levels were associated with membranous/cytoplasmic EGFR levels (rho = 0.82, P < 0.001), nuclear extracellular signal-regulated kinase-2 (rho = 0.30, P = 0.01), and nuclear proliferating cell nuclear antigen (PCNA; rho = 0.36, P = 0.003). Nuclear phosphorylated-Akt, cyclin D1, phosphatase and tensin homolog (mutated in multiple cancers 1) (PTEN), p53, and proliferation marker Ki-67 levels did not correlate with nuclear EGFR level. In multivariable analysis, only PCNA retained its significant association (P = 0.01). CONCLUSIONS These results are consistent with preclinical data showing that EGFR may function as a tyrosine kinase in the nucleus, phosphorylating and stabilizing PCNA. The nuclear activity of EGFR may constitute a novel therapeutic target.
Collapse
|