{"id":10217,"date":"2020-06-19T14:54:10","date_gmt":"2020-06-19T18:54:10","guid":{"rendered":"https:\/\/themedicalxchange.com\/?p=10217"},"modified":"2021-09-01T15:38:01","modified_gmt":"2021-09-01T19:38:01","slug":"2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up","status":"publish","type":"post","link":"https:\/\/themedicalxchange.com\/en\/2020\/06\/19\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\/","title":{"rendered":"Next-Generation BTK Inhibitors Fulfilling Promise for CLL in Long-Term Follow-Up"},"content":{"rendered":"<p>The new data support the premise that the greater BTK selectivity of the next-generation therapies provides efficacy and safety advantages relative to ibrutinib, the first BTK inhibitor. This included follow-up data out to a median of 55 months with acalabrutinib, which was recently approved in Canada for first-line and relapsed\/refractory (R\/R) CLL. Other next-generation BTK inhibitors in development, such as zanubrutinib, are also showing high rates of activity and low relative levels of toxicity in B-cell diseases.<\/p>\n<h2>90% Improvement in Progression-Free Survival at 28 Months<\/h2>\n<p>The data from the ELEVATE-TN and ASCEND trials, which were conducted in treatment-na\u00efve and R\/R CLL, respectively, provided the basis for the recent acalabrutinib approval in Canada. Both studies associated this next-generation BTK inhibitor with a favourable safety and efficacy profile. Now, new follow-up data show the effect is sustained.<\/p>\n<p>\u201cEven as a monotherapy in the long-term follow-up, acalabrutinib achieved high and persistent responses regardless of genomic features,\u201d reported Dr. John C. Byrd, chairman of leukemia research, Ohio State University Comprehensive Cancer Center, Columbus.\u00a0<br \/><\/p>\n<blockquote>\n<p>\u201cEven as a monotherapy in the long-term follow-up, acalabrutinib achieved high and persistent responses.\u201d<\/p>\n<\/blockquote>\n<p>The long-term follow-up data were derived from ACE-CL-001, the first phase 2 trial with acalabrutinib in treatment-na\u00efve patients. With a 97% overall response rate (ORR), the initial response rates were reported to be similar across groups defined as high-risk by RAI stage, presence of bulky disease, or adverse genomic features. Now, after a median of more than four years (53 months) of follow-up, disease control is being sustained in most of those initially enrolled. At the 48-month timepoint, the median duration of response (DOR), event-free survival (EFS), and progression-free survival (PFS) have not been reached, Dr. Byrd reported.\u00a0The proportion of patients in EFS at 48 months is 90% \u00a0<a href=\"javascript:void(0)\" class=\"show-image\" data-index=\"0\">(Figure 1<\/a>). The PFS at 48 months was 96%.<\/p>\n<p>Of the 99 patients who entered the trial, 85 (86%) are still receiving acalabrutinib. Only three patients have left the study due to progressive disease. Only six discontinued due to an adverse event.<\/p>\n<p>There have been no new adverse events observed over the long-term follow-up, but Dr. Byrd did report that all of the most common adverse events, including diarrhea, headache, nausea, and hypertension diminished over the period of extended treatment <a href=\"javascript:void(0)\" class=\"show-image\" data-index=\"1\">(Figure 2<\/a>).<\/p>\n<p>With these data, which represent \u201cthe longest safety and efficacy follow-up to date with acalabrutinib in treatment-na\u00efve CLL patients,\u201d Dr. Byrd said that evidence confirms that sustained benefit follows the high rates of response previously reported.<\/p>\n<h2>ASCEND Final Results<\/h2>\n<p>Final results from the phase 3 ASCEND trial, which established the efficacy of acalabrutinib in R\/R CLL were also presented at EHA25 Virtual. In that trial, 310 patients were randomized to 100-mg twice-daily acalabrutinib or investigator\u2019s choice of rituximab plus idelalisib (IdR) or bendamustine.<\/p>\n<p>\u201cAt a median follow-up of 22 months, the median PFS was not reached in the acalabrutinib arm,\u201d reported Dr. Paolo Ghia, Director of the Strategic Research Program on CLL, University Vita-Salute San Raffaele, Milan, Italy. Relative to a median PFS of 16.8 months, the rates of PFS at 18 months were 82% and 48% for the acalabrutinib and comparator arms respectively, producing a 77% risk reduction (HR 0.23; <em>P<\/em>&lt;0.0001).<br \/><\/p>\n<blockquote>\n<p>\u201cAt a median\u00a0follow-up of 22 months, the median PFS was not reached in the acalabrutinib arm.\u201d<\/p>\n<\/blockquote>\n<p>At 80% in both arms, there is no difference in overall survival (OS) rate in follow-up so far, but acalabrutinib was far better tolerated. The rates of study discontinuations due to an adverse effect were 16% versus 56% <a href=\"javascript:void(0)\" class=\"show-image\" data-index=\"2\">(Figure 3<\/a>).<\/p>\n<h2>Data for Waldenstr\u00f6m\u2019s Macroglobulinemia<\/h2>\n<p>The promise of other next-generation BTK inhibitors, such as zanubrutinib, is also attributed to relative BTK selectivity. In Waldenstr\u00f6m\u2019s macroglobulinemia (WM), the next-generation zanubrutinib showed greater activity than ibrutinib in the head-to-head phase 3 ASPEN trial even though significance for superiority on the primary combined endpoint of complete (CR) and very good partial responses (VGPR) was missed (28.4% vs 19.2%; <em style=\"font-size: 10.5pt;\">P<\/em>=0.092).<\/p>\n<p>&#8220;Other indicators, such as investigator-assessment of clinical response [30.4% vs. 18.2%; <em>P<\/em>=0.03] did suggest an advantage for zanubrutinib,\u201d reported Dr. Meletios Dimopoulos, Chairman, Department of Clinical Therapeutics, University of Athens, Greece.<\/p>\n<p>Fewer treatment discontinuations for adverse events in the zanubrutinib arm (4.0% vs. 9.2%) support the premise that the greater selectivity of the newer BTK inhibitors will confer an advantage for safety and efficacy relative to first-generation ibrutinib.<\/p>\n<h2>Conclusion<\/h2>\n<p>Long-term data support exceptional activity for the next-generation BTK inhibitors in CLL and potentially other B-cell malignancies. By demonstrating relatively low rates of serious toxicities and durable response, the trial data validate the importance of BTK specificity.<!-- [if gte vml 1]><v:oval\n id=\"Oval_x0020_21\" o:spid=\"_x0000_s1027\" style='position:absolute;left:0;\n text-align:left;margin-left:566.95pt;margin-top:563.3pt;width:5.65pt;height:5.65pt;\n z-index:251656704;visibility:visible;mso-position-horizontal-relative:text;\n mso-position-vertical-relative:text' o:gfxdata=\"UEsDBBQABgAIAAAAIQC2gziS\/gAAAOEBAAATAAAAW0NvbnRlbnRfVHlwZXNdLnhtbJSRQU7DMBBF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\nAAQA8wAAAHkFAAAAAA==\n\" fillcolor=\"#c00000\" strokecolor=\"#c00000\">\n <v:shadow opacity=\"49150f\"\/>\n <v:textbox inset=\".5mm,0,.5mm,0\"\/>\n<\/v:oval><![endif]--><!-- [if !vml]--><!--[endif]--><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Virtual Meeting <\/b>\u2013 New follow-up data presented at EHA25 Virtual have greatly expanded the evidence that next-generation Bruton tyrosine kinase (BTK) inhibitors are providing far more durable control in the B-cell malignancies to which they have been compared than the first-generation agent. In chronic lymphocytic leukemia (CLL), follow-up data showing durable benefit with a next-generation BTK inhibitor is now out to four years, confirming sustained disease control with no unexpected toxicity.<\/p>\n","protected":false},"author":9,"featured_media":10240,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"tags":[542,565],"class_list":["post-10217","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-542","tag-eha","area_tag-hematology","area_tag-oncology"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Next-Generation BTK Inhibitors Fulfilling Promise for CLL in Long-Term Follow-Up - The Medical Xchange<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/themedicalxchange.com\/en\/2020\/06\/19\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Next-Generation BTK Inhibitors Fulfilling Promise for CLL in Long-Term Follow-Up - The Medical Xchange\" \/>\n<meta property=\"og:description\" content=\"Virtual Meeting \u2013 New follow-up data presented at EHA25 Virtual have greatly expanded the evidence that next-generation Bruton tyrosine kinase (BTK) inhibitors are providing far more durable control in the B-cell malignancies to which they have been compared than the first-generation agent. In chronic lymphocytic leukemia (CLL), follow-up data showing durable benefit with a next-generation BTK inhibitor is now out to four years, confirming sustained disease control with no unexpected toxicity.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/themedicalxchange.com\/en\/2020\/06\/19\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\/\" \/>\n<meta property=\"og:site_name\" content=\"The Medical Xchange\" \/>\n<meta property=\"article:published_time\" content=\"2020-06-19T18:54:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-09-01T19:38:01+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/themedicalxchange.com\/wp-content\/uploads\/2020\/06\/XFA20120_MXCR-2423_Graphiques_EN3-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2560\" \/>\n\t<meta property=\"og:image:height\" content=\"1920\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daniela Lopes\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniela Lopes\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/2020\\\/06\\\/19\\\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/2020\\\/06\\\/19\\\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\\\/\"},\"author\":{\"name\":\"Daniela Lopes\",\"@id\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/#\\\/schema\\\/person\\\/f3318b53ccceaeb046bcb26e99f5c94c\"},\"headline\":\"Next-Generation BTK Inhibitors Fulfilling Promise for CLL in Long-Term Follow-Up\",\"datePublished\":\"2020-06-19T18:54:10+00:00\",\"dateModified\":\"2021-09-01T19:38:01+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/2020\\\/06\\\/19\\\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\\\/\"},\"wordCount\":750,\"commentCount\":0,\"image\":{\"@id\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/2020\\\/06\\\/19\\\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/themedicalxchange.com\\\/wp-content\\\/uploads\\\/2020\\\/06\\\/XFA20120_MXCR-2423_Graphiques_EN3-scaled.jpg\",\"keywords\":[\"2020\",\"EHA\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/2020\\\/06\\\/19\\\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\\\/\",\"url\":\"https:\\\/\\\/themedicalxchange.com\\\/en\\\/2020\\\/06\\\/19\\\/2423-next-generation-btk-inhibitors-fulfilling-promise-for-cll-in-long-term-follow-up\\\/\",\"name\":\"Next-Generation BTK Inhibitors Fulfilling Promise for CLL in Long-Term Follow-Up - 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