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1. Systems Pharmacology Modeling of Prostate‐Specific Antigen in Patients With Prostate Cancer Treated With an Androgen Receptor Antagonist and Down‐Regulator

Author

Mistry, HB, Fabre, M‐A, Young, J, Clack, G, and Dickinson, PA

Subjects
Male, Systems Analysis, Down-Regulation, Original Articles, Prostate-Specific Antigen, urologic and male genital diseases, Models, Biological, Pyridazines, Prostatic Neoplasms, Castration-Resistant, Treatment Outcome, Receptors, Androgen, Androgen Receptor Antagonists, Humans, Original Article
Abstract

First‐in‐human (FIH) studies with AZD3514, a selective androgen receptor (AR) down‐regulator, showed decreases of >30% in the prostate‐specific antigen (PSA) in some patients. A modeling approach was adopted to understand these observations and define the optimum clinical use hypothesis for AZD3514 for clinical testing. Initial empirical modeling showed that only baseline PSA correlated significantly with this biological response, whereas drug concentration did not. To identify the mechanistic cause of this observation, a mechanism‐based model was first developed, which described the effects of AZD3514 on AR protein and PSA mRNA levels in LNCaP cells with and without dihydrotestosterone (DHT). Second, the mechanism‐based model was linked to a population pharmacokinetic (PK) model; PSA effects of clinical doses were subsequently simulated under different clinical conditions. This model was used to adjust the design of the ongoing clinical FIH study and direct the backup program.

Published
2016

2. 20-year risks of breast-cancer recurrence after stopping endocrine therapy at 5 years

Author

Pan, H, Gray, R, Braybrooke, J, Davies, C, Taylor, C, Mcgale, P, Peto, R, Pritchard, Ki, Bergh, J, Dowsett, M, Hayes, Df, Albain, K, Anderson, S, Arriagada, R, Barlow, W, Bartlett, J, Bergsten‐nordström, E, Bliss, J, Boccardo, F, Bradley, R, Brain, E, Cameron, D, Clarke, M, Coates, A, Coleman, R, Correa, C, Costantino, J, Cuzick, J, Davidson, N, Dodwell, D, Di Leo, A, Ewertz, M, Forbes, J, Gelber, R, Gnant, M, Goldhirsch, A, Goodwin, P, Hill, C, Ingle, J, Jagsi, R, Janni, W, Loibl, S, Mackinnon, E, Martin, M, Mukai, H, Norton, L, Ohashi, Y, Paik, S, Perez, E, Piccart, M, Pierce, L, Poortmans, P, Raina, V, Ravdin, P, Regan, M, Robertson, J, Rutgers, E, Slamon, D, Sparano, J, Swain, S, Tutt, A, Viale, G, Von Minckwitz, G, Wang, X, Whelan, T, Wilcken, N, Winer, E, Wolmark, N, Wood, W, Zambetti, M, Alberro, Ja, Ballester, B, Deulofeu, P, Fábregas, R, Fraile, M, Gubern, Jm, Janer, J, Moral, A, De Pablo Jl, Peñalva, G, Puig, P, Ramos, M, Rojo, R, Santesteban, P, Serra, C, Solà, M, Solarnau, L, Solsona, J, Veloso, E, Vidal, S, Abe, O, Abe, R, Enomoto, K, Kikuchi, K, Koyama, H, Masuda, H, Nomura, Y, Sakai, K, Sugimachi, K, Toi, M, Tominaga, T, Uchino, J, Yoshida, M, Haybittle, Jl, Leonard, Cf, Calais, G, Garaud, P, Collett, V, Delmestri, A, Sayer, J, Harvey, Vj, Holdaway, Im, Kay, Rg, Mason, Bh, Forbes, Jf, Balic, M, Bartsch, R, Fesl, C, Fitzal, F, Fohler, H, Greil, R, Jakesz, R, Marth, C, Mlineritsch, B, Pfeiler, G, Singer, Cf, Steger, Gg, Stöger, H, Canney, P, Yosef, Hma, Focan, C, Peek, U, Oates, Gd, Powell, J, Durand, M, Mauriac, L, Dolci, S, Larsimont, D, Nogaret, Jm, Philippson, C, Piccart, Mj, Masood, Mb, Parker, D, Price, Jj, Lindsay, Ma, Mackey, J, Hupperets, Psgj, Bates, T, Blamey, Rw, Chetty, U, Ellis, Io, Mallon, E, Morgan, Dal, Patnick, J, Pinder, S, Lohrisch, C, Nichol, A, Bramwell, Vh, Chen, Be, Gelmon, K, Goss, Pe, Levine, Mn, Parulekar, W, Pater, Jl, Shepherd, Le, Tu, D, Berry, D, Broadwater, G, Cirrincione, C, Muss, H, Weiss, Rb, Abu‐zahra, Ht, Portnoj, Sm, Bowden, S, Brookes, C, Dunn, J, Fernando, I, Lee, M, Poole, C, Rea, D, Spooner, D, Barrett‐lee, Pj, Mansel, Re, Monypenny, Ij, Gordon, Nh, Davis, Hl, Sestak, I, Lehingue, Y, Romestaing, P, Dubois, Jb, Delozier, T, Griffon, B, Mace Lesec’h, J, De La Lande, B, Mouret‐fourme, E, Mustacchi, G, Petruzelka, L, Pribylova, O, Owen, Jr, Harbeck, N, Jänicke, F, Meisner, C, Schmitt, M, Thomssen, C, Meier, P, Shan, Y, Shao, Yf, Zhao, Db, Chen, Zm, Howell, A, Swindell, R, Boddington, C, Burrett, Ja, Cutter, D, Duane, F, Evans, V, Gettins, L, Godwin, J, James, S, Kerr, A, Liu, H, Mannu, G, Mchugh, T, Morris, P, Read, S, Wang, Y, Wang, Z, Albano, J, De Oliveira Cf, Gervásio, H, Gordilho, J, Ejlertsen, B, Jensen, Mb, Johansen, H, Mouridsen, H, Palshof, T, Gelman, Rs, Harris, Jr, Henderson, C, Shapiro, Cl, Christiansen, P, Mouridsen, Ht, Fehm, T, Trampisch, Hj, Dalesio, O, De Vries Ege, Rodenhuis, S, Van Tinteren, H, Comis, Rl, Davidson, Ne, Robert, N, Sledge, G, Solin, Lj, Sparano, Ja, Tormey, Dc, Dixon, Jm, Forrest, P, Jack, W, Kunkler, I, Rossbach, J, Klijn, Jgm, Treurniet‐donker, Ad, Van Putten Wlj, Rotmensz, N, Veronesi, U, Bartelink, H, Bijker, N, Bogaerts, J, Cardoso, F, Cufer, T, Julien, Jp, Van De Velde Cjh, Cunningham, Mp, Brufsky, Am, Coleman, Re, Llombart, Ha, Huovinen, R, Joensuu, H, Costa, A, Bonadonna, G, Gianni, L, Valagussa, P, Goldstein, Lj, Bonneterre, J, Fargeot, P, Fumoleau, P, Kerbrat, P, Luporsi, E, Namer, M, Carrasco, E, Segui, Ma, Eiermann, W, Hilfrich, J, Jonat, W, Kaufmann, M, Kreienberg, R, Schumacher, M, Bastert, G, Rauschecker, H, Sauer, R, Sauerbrei, W, Schauer, A, Blohmer, Ju, Costa, Sd, Eidtmann, H, Gerber, B, Jackisch, C, De Schryver, A, Vakaet, L, Belfiglio, M, Nicolucci, A, Pellegrini, F, Pirozzoli, Mc, Sacco, M, Valentini, M, Mcardle, Cs, Smith, Dc, Stallard, S, Dent, Dm, Gudgeon, Ca, Hacking, A, Murray, E, Panieri, E, Werner, Id, Galligioni, E, Leone, B, Vallejo, Ct, Zwenger, A, Lopez, M, Erazo, A, Medina, Jy, Horiguchi, J, Takei, H, Fentiman, Is, Hayward, Jl, Rubens, Rd, Skilton, D, Scheurlen, H, Sohn, Hc, Untch, M, Dafni, U, Markopoulos, C, Fountzilas, G, Mavroudis, D, Klefstrom, P, Blomqvist, C, Saarto, T, Gallen, M, Tinterri, C, Margreiter, R, De Lafontan, B, Mihura, J, Roché, H, Asselain, B, Salmon, Rj, Vilcoq, Jr, André, F, Delaloge, S, Koscielny, S, Michiels, S, Rubino, C, A'Hern, R, Ellis, P, Kilburn, L, Yarnold, Jr, Benraadt, J, Kooi, M, Van De Velde Ao, Van Dongen Ja, Vermorken, Jb, Castiglione, M, Colleoni, M, Collins, J, Gelber, Rd, Lindtner, J, Price, Kn, Regan, Mm, Rudenstam, Cm, Senn, Hj, Thuerlimann, B, Bliss, Jm, Chilvers, Ced, Coombes, Rc, Hall, E, Marty, M, Buyse, M, Possinger, K, Schmid, P, Wallwiener, D, Bighin, C, Bruzzi, P, Del Mastro, L, Dozin, B, Pastorino, S, Pronzato, P, Sertoli, Mr, Foster, L, George, Wd, Stewart, Hj, Stroner, P, Borovik, R, Hayat, H, Inbar, Mj, Peretz, T, Robinson, E, Camerini, T, Formelli, F, Martelli, G, Di Mauro Mg, Perrone, F, Amadori, D, Martoni, A, Pannuti, F, Camisa, R, Musolino, A, Passalacqua, R, Iwata, H, Shien, T, Ikeda, T, Inokuchi, K, Sawa, K, Sonoo, H, Sadoon, M, Tulusan, Ah, Kohno, N, Miyashita, M, Takao, S, Ahn, Jh, Jung, Kh, Korzeniowski, S, Skolyszewski, J, Ogawa, M, Yamashita, J, Bastiaannet, E, Liefers, Gj, Christiaens, R, Neven, P, Paridaens, R, Van Den Bogaert, W, Braun, S, Martin, P, Romain, S, Janauer, M, Seifert, M, Sevelda, P, Zielinski, Cc, Hakes, T, Hudis, Ca, Wittes, R, Giokas, G, Kondylis, D, Lissaios, B, De La Huerta, R, Sainz, Mg, Ro, J, Camphausen, K, Danforth, D, Lichter, A, Lippman, M, Smart, D, Steinberg, S, D’Amico, C, Lioce, M, Paradiso, A, Ohno, S, Bass, G, Brown, A, Bryant, J, Dignam, J, Fisher, B, Geyer, C, Mamounas, Ep, Redmond, C, Wickerham, L, Aihara, T, Hozumi, Y, Baum, M, Jackson, Im, Palmer, Mk, Ingle, Jn, Suman, Vj, Bengtsson, No, Emdin, S, Jonsson, H, Venturini, M, Lythgoe, Jp, Kissin, M, Erikstein, B, Hannisdal, E, Jacobsen, Ab, Reinertsen, Kv, Varhaug, Je, Gundersen, S, Hauer‐jensen, M, Høst, H, Nissen‐meyer, R, Mitchell, Ak, Robertson, Jfr, Ueo, H, Di Palma, M, Mathé, G, Misset, Jl, Levine, M, Morimoto, K, Takatsuka, Y, Crossley, E, Harris, A, Talbot, D, Taylor, M, Cocconi, G, Di Blasio, B, Ivanov, V, Paltuev, R, Semiglazov, V, Brockschmidt, J, Cooper, Mr, Falkson, Ci, Hadji, P, A’Hern, R, Makris, A, Parton, M, Pennert, K, Powles, Tj, Smith, Ie, Gazet, Jc, Browne, L, Graham, P, Corcoran, N, Clack, G, Van Poznak, C, Deshpande, N, Di Martino, L, Douglas, P, Lindtner, A, Notter, G, Bryant, Ajs, Ewing, Gh, Firth, La, Krushen‐kosloski, Jl, Anderson, H, Killander, F, Malmström, P, Rydén, L, Arnesson, Lg, Carstensen, J, Dufmats, M, Fohlin, H, Nordenskjöld, B, Söderberg, M, Carpenter, Jt, Murray, N, Royle, Gt, Simmonds, Pd, Crowley, J, Gralow, J, Hortobagyi, G, Livingston, R, Martino, S, Osborne, Ck, Ravdin, Pm, Bondesson, T, Celebioglu, F, Dahlberg, K, Fornander, T, Fredriksson, I, Frisell, J, Göransson, E, Iiristo, M, Johansson, U, Lenner, E, Löfgren, L, Nikolaidis, P, Perbeck, L, Rotstein, S, Sandelin, K, Skoog, L, Svane, G, Af Trampe, E, Wadström, C, Maibach, R, Thürlimann, B, Holli, K, Rouhento, K, Safra, T, Brenner, H, Hercbergs, A, Yoshimoto, M, Paterson, Ahg, Fyles, A, Meakin, Jw, Panzarella, T, Bahi, J, Lemonnier, J, Martin, Al, Reid, M, Spittle, M, Bishop, H, Bundred, Nj, Forsyth, S, Pinder, Se, Deutsch, Gp, Kwong, Dlw, Pai, Vr, Senanayake, F, Rubagotti, A, Hackshaw, A, Houghton, J, Ledermann, J, Monson, K, Tobias, Js, Carlomagno, C, De Laurentiis, M, De Placido, S, Williams, L, Bell, R, Hinsley, S, Marshall, Hc, Pierce, Lj, Solomayer, E, Horsman, Jm, Lester, J, Winter, Mc, Buzdar, Au, Hsu, L, Love, Rr, Ahlgren, J, Garmo, H, Holmberg, L, Liljegren, G, Lindman, H, Wärnberg, F, Asmar, L, Jones, Se, Aft, R, Gluz, O, Liedtke, C, Nitz, U, Litton, A, Wallgren, A, Karlsson, P, Linderholm, Bk, Chlebowski, Rt, Caffier, H., Guided Treatment in Optimal Selected Cancer Patients (GUTS), Other departments, CCA - Cancer Treatment and Quality of Life, Radiotherapy, Pan, Hongchao, Gray, Richard, Braybrooke, Jeremy, Davies, Christina, Taylor, Carolyn, Mcgale, Paul, Peto, Richard, Pritchard, Kathleen I, Bergh, Jona, Dowsett, Mitch, Hayes, Daniel F, De Laurentiis, Michelino, MUMC+: MA Medische Oncologie (9), RS: GROW - R3 - Innovative Cancer Diagnostics & Therapy, and Interne Geneeskunde

Subjects
0301 basic medicine, Oncology, medicine.medical_treatment, Kaplan-Meier Estimate, law.invention, 0302 clinical medicine, Randomized controlled trial, law, Recurrence, Receptors, Neoplasm Metastasis, AMERICAN SOCIETY, Adjuvant, CLINICAL-PRACTICE GUIDELINE, Absolute risk reduction, Estrogen Antagonists, General Medicine, Estrogen Antagonist, CHEMOTHERAPY, Middle Aged, Prognosis, Neoplasm Metastasi, Local, POSTMENOPAUSAL WOMEN, Receptors, Estrogen, Chemotherapy, Adjuvant, 030220 oncology & carcinogenesis, Meta-analysis, Lymphatic Metastasis, Female, Human, Estrogen Antagonists/therapeutic use, Adult, Risk, medicine.medical_specialty, Prognosi, medicine.drug_class, DISCONTINUATION, Breast Neoplasms, Article, Drug Administration Schedule, LATE DISTANT RECURRENCE, 03 medical and health sciences, Breast cancer, Breast Neoplasms/drug therapy, Internal medicine, SCORE, medicine, Humans, SURGICAL ADJUVANT BREAST, Aged, Proportional Hazards Models, Chemotherapy, business.industry, Proportional hazards model, Lymphatic Metastasi, TAMOXIFEN THERAPY, ta3122, medicine.disease, Estrogen, RANDOMIZED-TRIALS, Discontinuation, Surgery, Neoplasm Recurrence, 030104 developmental biology, Proportional Hazards Model, Neoplasm Grading, Neoplasm Recurrence, Local, business
Abstract

Background The administration of endocrine therapy for 5 years substantially reduces recurrence rates during and after treatment in women with early-stage, estrogen-receptor (ER)–positive breast cancer. Extending such therapy beyond 5 years offers further protection but has additional side effects. Obtaining data on the absolute risk of subsequent distant recurrence if therapy stops at 5 years could help determine whether to extend treatment. Methods In this meta-analysis of the results of 88 trials involving 62,923 women with ER-positive breast cancer who were disease-free after 5 years of scheduled endocrine therapy, we used Kaplan–Meier and Cox regression analyses, stratified according to trial and treatment, to assess the associations of tumor diameter and nodal status (TN), tumor grade, and other factors with patients’ outcomes during the period from 5 to 20 years. Results Breast-cancer recurrences occurred at a steady rate throughout the study period from 5 to 20 years. The risk of distant recurrence was strongly correlated with the original TN status. Among the patients with stage T1 disease, the risk of distant recurrence was 13% with no nodal involvement (T1N0), 20% with one to three nodes involved (T1N1–3), and 34% with four to nine nodes involved (T1N4–9); among those with stage T2 disease, the risks were 19% with T2N0, 26% with T2N1–3, and 41% with T2N4–9. The risk of death from breast cancer was similarly dependent on TN status, but the risk of contralateral breast cancer was not. Given the TN status, the factors of tumor grade (available in 43,590 patients) and Ki-67 status (available in 7692 patients), which are strongly correlated with each other, were of only moderate independent predictive value for distant recurrence, but the status regarding the progesterone receptor (in 54,115 patients) and human epidermal growth factor receptor type 2 (HER2) (in 15,418 patients in trials with no use of trastuzumab) was not predictive. During the study period from 5 to 20 years, the absolute risk of distant recurrence among patients with T1N0 breast cancer was 10% for low-grade disease, 13% for moderate-grade disease, and 17% for high-grade disease; the corresponding risks of any recurrence or a contralateral breast cancer were 17%, 22%, and 26%, respectively. Conclusions After 5 years of adjuvant endocrine therapy, breast-cancer recurrences continued to occur steadily throughout the study period from 5 to 20 years. The risk of distant recurrence was strongly correlated with the original TN status, with risks ranging from 10 to 41%, depending on TN status and tumor grade. (Funded by Cancer Research UK and others.)

Published
2017

3. Systems Pharmacology Modeling of Prostate-Specific Antigen in Patients With Prostate Cancer Treated With an Androgen Receptor Antagonist and Down-Regulator

Author

Mistry, Hitesh, Fabre, M-A, Young, J., Clack, G., and Dickinson, P.A.

Subjects
urologic and male genital diseases
Abstract

First-in-human (FIH) studies with AZD3514, a selective androgen receptor (AR) down-regulator, showed decreases of >30% in the prostate-specific antigen (PSA) in some patients. A modeling approach was adopted to understand these observations and define the optimum clinical use hypothesis for AZD3514 for clinical testing. Initial empirical modeling showed that only baseline PSA correlated significantly with this biological response, whereas drug concentration did not. To identify the mechanistic cause of this observation, a mechanism-based model was first developed, which described the effects of AZD3514 on AR protein and PSA mRNA levels in LNCaP cells with and without dihydrotestosterone (DHT). Second, the mechanism-based model was linked to a population pharmacokinetic (PK) model; PSA effects of clinical doses were subsequently simulated under different clinical conditions. This model was used to adjust the design of the ongoing clinical FIH study and direct the backup program.

Published
2016
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4. Adjuvant bisphosphonate treatment in early breast cancer: meta-analyses of individual patient data from randomised trials

Author

Early Breast Cancer Trialists' Collaborative Group (EBCTCG), Coleman, R, Powles, T, Paterson, A, Gnant, M, Anderson, S, Diel, I, Gralow, J, von Minckwitz, G, Moebus, V, Bergh, J, Pritchard, KI, Bliss, J, Cameron, D, Evans, V, Pan, H, Peto, R, Bradley, R, Gray, R, Bartsch, R, Dubsky, P, Fesl, C, Fohler, H, Greil, R, Jakesz, R, Lang, A, Luschin-Ebengreuth, G, Marth, C, Mlineritsch, B, Samonigg, H, Singer, CF, Steger, GG, Stoger, H, Olivotto, I, Ragaz, J, Christiansen, P, Ejlertsen, B, Ewertz, M, Jensen, M-B, Moller, S, Mouridsen, HT, Eiermann, W, Hilfrich, J, Jonat, W, Kaufmann, M, Kreienberg, R, Schumacher, M, Blohmer, JU, Costa, SD, Eidtmann, H, Gerber, B, Jackisch, C, Loibl, S, Dafni, U, Markopoulos, C, Blomqvist, C, Saarto, T, Ahn, J-H, Jung, KH, Perrone, F, Bass, G, Brown, A, Bryant, J, Costantino, J, Dignam, J, Fisher, B, Geyer, C, Mamounas, EP, Paik, S, Redmond, C, Swain, S, Wickerham, L, Wolmark, N, Perez, E, Ingle, JN, Suman, VJ, Hadji, P, A'Hern, R, Dowsett, M, Makris, A, Parton, M, Pennert, K, Powles, TJ, Smith, IE, Yarnold, JR, Clack, G, Van Poznak, C, Safra, T, Bell, R, Coleman, RE, Dodwell, D, Hinsley, S, Marshall, HC, Solomayer, E, Fehm, T, Lester, J, Winter, MC, Horsman, JM, Aft, R, Brufsky, AM, and Llombart, HA

Abstract

Background Bisphosphonates have profound effects on bone physiology, and could modify the process of metastasis. We undertook collaborative meta-analyses to clarify the risks and benefits of adjuvant bisphosphonate treatment in breast cancer. Methods We sought individual patient data from all unconfounded trials in early breast cancer that randomised between bisphosphonate and control. Primary outcomes were recurrence, distant recurrence, and breast cancer mortality. Primary subgroup investigations were site of first distant recurrence (bone or other), menopausal status (postmenopausal [combining natural and artificial] or not), and bisphosphonate class (aminobisphosphonate [eg, zoledronic acid, ibandronate, pamidronate] or other [ie, clodronate]). Intention-to-treat log-rank methods yielded bisphosphonate versus control first-event rate ratios (RRs). Findings We received data on 18 766 women (18 206 [97%] in trials of 2–5 years of bisphosphonate) with median follow-up 5·6 woman-years, 3453 first recurrences, and 2106 subsequent deaths. Overall, the reductions in recurrence (RR 0·94, 95% CI 0·87–1·01; 2p=0·08), distant recurrence (0·92, 0·85–0·99; 2p=0·03), and breast cancer mortality (0·91, 0·83–0·99; 2p=0·04) were of only borderline significance, but the reduction in bone recurrence was more definite (0·83, 0·73–0·94; 2p=0·004). Among premenopausal women, treatment had no apparent effect on any outcome, but among 11 767 postmenopausal women it produced highly significant reductions in recurrence (RR 0·86, 95% CI 0·78–0·94; 2p=0·002), distant recurrence (0·82, 0·74–0·92; 2p=0·0003), bone recurrence (0·72, 0·60–0·86; 2p=0·0002), and breast cancer mortality (0·82, 0·73–0·93; 2p=0·002). Even for bone recurrence, however, the heterogeneity of benefit was barely significant by menopausal status (2p=0·06 for trend with menopausal status) or age (2p=0·03), and it was non-significant by bisphosphonate class, treatment schedule, oestrogen receptor status, nodes, tumour grade, or concomitant chemotherapy. No differences were seen in non-breast cancer mortality. Bone fractures were reduced (RR 0·85, 95% CI 0·75–0·97; 2p=0·02). Interpretation Adjuvant bisphosphonates reduce the rate of breast cancer recurrence in the bone and improve breast cancer survival, but there is definite benefit only in women who were postmenopausal when treatment began. Funding Cancer Research UK, Medical Research Council.

Published
2015

5. AZD3514, an oral selective androgen receptor down-regulator in patients with castration-resistant prostate cancer - Results of two parallel first-in-human phase I studies

Author

Omlin, A., Jones, R. J., Van Der Noll, R., Satoh, T., Niwakawa, M., Smith, S. A., Graham, J., Ong, M., Finkelman, R. D., Schellens, J. H M, Zivi, A., Crespo, M., Riisnaes, R., Nava-Rodrigues, D., Malone, M. D., Dive, C., Sloane, R., Moore, D., Alumkal, J. J., Dymond, A., Dickinson, P. A., Ranson, M., Clack, G., De Bono, J., Elliott, T., Pharmacoepidemiology and Clinical Pharmacology, Sub Clinical Pharmacology, Pharmacoepidemiology and Clinical Pharmacology, and Sub Clinical Pharmacology

Subjects
Male, medicine.medical_specialty, Selective androgen receptor down-regulator, Nausea, Administration, Oral, Down-Regulation, Antineoplastic Agents, Gastroenterology, Prostate cancer, Phase I, Pharmacokinetics, Internal medicine, medicine, Humans, Pharmacology (medical), Dosing, Adverse effect, Aged, Aged, 80 and over, Pharmacology, Dose-Response Relationship, Drug, business.industry, Middle Aged, Prostate-Specific Antigen, medicine.disease, Neoplastic Cells, Circulating, Pyridazines, Radiography, Prostate-specific antigen, Prostatic Neoplasms, Castration-Resistant, Endocrinology, Oncology, Receptors, Androgen, (5) Castration-resistant prostate cancer, First-in-human, Toxicity, AZD3514, Vomiting, medicine.symptom, business
Abstract

Background: AZD3514 is a first-in-class, orally bio-available, androgen-dependent and -independent androgen receptor inhibitor and selective androgen-receptor down-regulator (SARD). Methods: In study 1 and 2, castration-resistant prostate cancer (CRPC) patients (pts) were initially recruited into a once daily (QD) oral schedule (A). In study 1, pharmacokinetic assessments led to twice daily (BID) dosing (schedule B) to increase exposure. Study 2 explored a once daily schedule. Results: In study 1, 49 pts were treated with escalating doses of AZD3514 (A 35 pts, B 14 pts). Starting doses were 100 mg (A) and 1000 mg (B). The AZD3514 formulation was switched from capsules to tablets at 1000 mg QD. 2000 mg BID was considered non-tolerable due to grade (G) 2 toxicities (nausea [N], vomiting [V]). No adverse events (AEs) met the dose-limiting toxicity (DLT) definition. Thirteen pts received AZD3514 in study 2, with starting doses of 250 mg QD. The most frequent drug-related AEs were N: G1/2 in 55/70 pts (79 %); G3 in 1 pt (1.4 %); & V: G1/2 in 34/70 pts (49 %) & G3 in 1 pt (1.4 %). PSA declines (≥50 %) were documented in 9/70 patients (13 %). Objective soft tissue responses per RECIST1.1 were observed in 4/24 (17 %) pts in study 1. Conclusion: AZD3514 has moderate anti-tumour activity in pts with advanced CRPC but with significant levels of nausea and vomiting. However, anti-tumour activity as judged by significant PSA declines, objective responses and durable disease stabilisations, provides the rationale for future development of SARD compounds.

Published
2015

7. The ATAC adjuvant breast-cancer trial: six-year results of the endometrial subprotocol

Author

S, Duffy, T L, Jackson, M, Lansdown, K, Philips, M, Wells, G, Clack, A R, Bianco, N, Williams, Duffy, S., Jackson, T. L., Lansdown, M., Philips, K., Wells, M., Clack, G., Bianco, ANGELO RAFFAELE, and DE PLACIDO, Sabino

Subjects
Oncology, Adult, medicine.medical_specialty, Antineoplastic Agents, Hormonal, Estrogen receptor, Anastrozole, Breast Neoplasms, law.invention, Endometrium, breast cancer, Breast cancer, Randomized controlled trial, law, Internal medicine, Nitriles, medicine, Humans, skin and connective tissue diseases, endocrine therapy, business.industry, Hazard ratio, toxicity, Obstetrics and Gynecology, Odds ratio, Middle Aged, Triazoles, medicine.disease, Confidence interval, Postmenopause, Tamoxifen, Treatment Outcome, endometrial, Chemotherapy, Adjuvant, Female, business, medicine.drug
Abstract

Postmenopausal women with localised, early breast cancer (n = 285) were enrolled in a prospective subprotocol of the 'arimidex, tamoxifen, alone or in combination' (ATAC) trial to assess gynaecological abnormalities arising during treatment with anastrozole (1 mg/day) or tamoxifen (20 mg/day). After 6 years' follow-up, there appeared to be non-significantly fewer endometrial abnormalities with anastrozole than with tamoxifen (12.4% vs 20.2%, odds ratio 0.52; 95% confidence intervals 0.20, 1.32; p = 0.17). The time to first endometrial abnormality was non-significantly longer for patients receiving anastrozole compared with tamoxifen (hazard ratio 0.57; 95% confidence intervals 0.26, 1.22; p = 0.15), with most abnormalities occurring within the first year of treatment. Fewer patients treated with anastrozole appeared to require medical intervention for endometrial abnormalities, compared with patients on tamoxifen. This study showed that there was no significant difference in endometrial pathology between anastrozole and tamoxifen treatment groups.

Published
2010

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