Cited by 6,144Lipoproteins and Cardiovascular HealthAtherosclerosis and Cardiovascular DiseasesAcute Myocardial Infarction Research

Evolocumab and Clinical Outcomes in Patients with Cardiovascular Disease

Open access
Sabatine, Marc S., Giugliano, Robert P., Keech, Anthony C., Honarpour, Narimon, Wiviott, Stephen D., Murphy, Sabina A., Kuder, Julia F., Wang, Huei +4 more·2017·New England Journal of Medicine

Abstract

BACKGROUND: Evolocumab is a monoclonal antibody that inhibits proprotein convertase subtilisin-kexin type 9 (PCSK9) and lowers low-density lipoprotein (LDL) cholesterol levels by approximately 60%. Whether it prevents cardiovascular events is uncertain. METHODS: We conducted a randomized, double-blind, placebo-controlled trial involving 27,564 patients with atherosclerotic cardiovascular disease and LDL cholesterol levels of 70 mg per deciliter (1.8 mmol per liter) or higher who were receiving statin therapy. Patients were randomly assigned to receive evolocumab (either 140 mg every 2 weeks or 420 mg monthly) or matching placebo as subcutaneous injections. The primary efficacy end point was the composite of cardiovascular death, myocardial infarction, stroke, hospitalization for unstable angina, or coronary revascularization. The key secondary efficacy end point was the composite of cardiovascular death, myocardial infarction, or stroke. The median duration of follow-up was 2.2 years. RESULTS: At 48 weeks, the least-squares mean percentage reduction in LDL cholesterol levels with evolocumab, as compared with placebo, was 59%, from a median baseline value of 92 mg per deciliter (2.4 mmol per liter) to 30 mg per deciliter (0.78 mmol per liter) (P<0.001). Relative to placebo, evolocumab treatment significantly reduced the risk of the primary end point (1344 patients [9.8%] vs. 1563 patients [11.3%]; hazard ratio, 0.85; 95% confidence interval [CI], 0.79 to 0.92; P<0.001) and the key secondary end point (816 [5.9%] vs. 1013 [7.4%]; hazard ratio, 0.80; 95% CI, 0.73 to 0.88; P<0.001). The results were consistent across key subgroups, including the subgroup of patients in the lowest quartile for baseline LDL cholesterol levels (median, 74 mg per deciliter [1.9 mmol per liter]). There was no significant difference between the study groups with regard to adverse events (including new-onset diabetes and neurocognitive events), with the exception of injection-site reactions, which were more common with evolocumab (2.1% vs. 1.6%). CONCLUSIONS: In our trial, inhibition of PCSK9 with evolocumab on a background of statin therapy lowered LDL cholesterol levels to a median of 30 mg per deciliter (0.78 mmol per liter) and reduced the risk of cardiovascular events. These findings show that patients with atherosclerotic cardiovascular disease benefit from lowering of LDL cholesterol levels below current targets. (Funded by Amgen; FOURIER ClinicalTrials.gov number, NCT01764633 .).

Integrity signals

Registry

Crossref · 10.1056/nejmoa1615664

Cites

34 of 34 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

15 of 26 cited sources checked · 9 supported · 0 flagged · accuracy not yet measured

  • Premisecitation

    There were little more than 100 events in the phase 2 and phase 3 trials of PCSK9 inhibitors combined.

    “However, there were little more than 100 events in these studies combined.”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [9] source

      The Results passage reproduced in the Discussion reports 29 cardiovascular events in the evolocumab group and 31 in the standard-therapy group—60 in the combined OSLER trials. The paper identifies these as follow-up trials for participants from phase 2 and phase 3 studies, but it does not establish the claimed total of little more than 100 events across the studies referred to by the citing sentence. (LLM, conf=0.84)

      Experimental — accuracy not yet measured
    • cites [10] source
  • Premisecitation

    Exploratory data from longer-term follow-up in phase 2 and phase 3 trials of PCSK9 inhibitors showed significant reductions in cardiovascular outcomes.

    “Moreover, exploratory data from longer-term follow-up in phase 2 and phase 3 trials of PCSK9 inhibitors showed significant reductions in cardiovascular outcomes.9,10”
    Quote in the paperSubstantial claim1 of 2 sources checked
    • cites [9] source
    • cites [10] source
  • Premisecitation

    A recent mendelian randomization study found that variants in PCSK9 and variants in HMGCR were associated with nearly identical lower risks of cardiovascular events per unit reduction in LDL cholesterol.

    “Likewise, these observations are supported by data from a recent mendelian randomization study in which variants in PCSK9 and variants in HMGCR were associated with nearly identical lower risks of cardiovascular events per unit reduction in LDL cholesterol.29”
    Quote in the paperSubstantial claim1 of 1 sources checked
  • Interpretationcitation

    The rate of discontinuation of evolocumab injections because of adverse events ascribed to the drug compares favorably to rates with atorvastatin 80 mg daily (1.5% per year) and ezetimibe (1.1% per year) in other trials.

    “and compares favorably to the rates that have been found with atorvastatin at a dose of 80 mg daily (1.5% per year) and with ezetimibe (1.1% per year) in other trials.14,15”
    Quote in the paperNot a substantial claim2 of 2 sources checked
    • cites [14] source
    • cites [15] source

      The Safety section reports discontinuation owing to an adverse event in 10.6% of patients receiving simvastatin–ezetimibe, versus 10.1% receiving simvastatin alone. It does not report the cited 1.1% per-year rate or identify those adverse events as caused by ezetimibe. The atorvastatin comparison is not a finding of this trial. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
  • Findingown data

    In FOURIER, additional lowering of LDL cholesterol levels had no effect on cardiovascular mortality.

    “In an observation consistent with previous trials of more intensive LDL cholesterol-lowering therapy as compared with moderate-intensity statin therapy, 15,25 we found no effect of additional lowering of LDL cholesterol levels on cardiovascular mortality.”
    Quote in the paperSubstantial claim2 of 2 sources checked
  • May combine two claims. 15
  • Classified as probably not a substantial claim. 11
  • May combine two claims.

    Study design and conductcitation

    The size of the patient population was based on the key secondary end point, and 1630 such end-point events were required to provide 90% power to detect a 15% relative risk reduction with evolocumab as compared with placebo.

    “The size of the patient population in the trial was based on the key secondary end point, and we estimated that 1630 such end-point events were required to provide 90% power to detect a 15% relative risk reduction with evolocumab as compared with placebo.11”
    Quote in the paperSubstantial claim1 of 1 sources checked
  • May combine two claims.

    Premisecitation

    Carriage of PCSK9 loss-of-function alleles is associated with lower LDL cholesterol levels and a reduced risk of myocardial infarction.

    “Genetic studies have shown that carriage of PCSK9 loss-of-function alleles is associated with lower LDL cholesterol levels and a reduced risk of myocardial infarction.7,8”
    Quote in the paperSubstantial claim2 of 2 sources checked
    • cites [7] source

      The Discussion (page unavailable) reports that LDL-lowering PCSK9 variants were associated with reduced coronary heart disease. The Methods (page unavailable) define that outcome as a composite including myocardial infarction, CHD death, and coronary revascularization; the paper does not report a separate reduction in myocardial infarction risk. (LLM, conf=0.85)

      Experimental — accuracy not yet measured
    • cites [8] source
  • May combine two claims.

    Premisecitation

    In IMPROVE-IT, the addition of ezetimibe to statin therapy lowered LDL cholesterol levels from 70 mg per deciliter to 54 mg per deciliter and significantly reduced major cardiovascular events.

    “More recently, the addition of ezetimibe to statin therapy in the Improved Reduction of Outcomes: Vytorin Efficacy International Trial (IMPROVE-IT) lowered LDL cholesterol levels from 70 mg per deciliter (1.8 mmol per liter) to 54 mg per deciliter (1.4 mmol per liter) and significantly reduced major cardiovascular events.”
    Quote in the paperNot a substantial claim1 of 1 sources checked
  • May combine two claims.

    Findingcitation

    The risk of new-onset diabetes in FOURIER appeared to be similar in the two groups, although the 95% confidence intervals did not exclude the point estimates observed with statins.

    “The risk of new-onset diabetes in our trial appeared to be similar in the two groups, although the 95% confidence intervals did not exclude the point estimates observed with statins.30,31”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [30] source
    • cites [31] source
  • May combine two claims.

    Findingown data

    In the evolocumab group, new binding antibodies developed in 43 patients (0.3%), and no patient developed neutralizing antibodies.

    “In the evolocumab group, new binding antibodies developed in 43 patients (0.3%), and development of neutralizing antibodies did not occur in any patient.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Approximately 90% of injection-site reactions in each group were classified as mild, and only 0.1% of patients in each group stopped receiving the study agent because of an injection-site reaction.

    “The large majority of reactions (approximately 90% in each group) were classified as mild, and only 0.1% of the patients in each group stopped receiving the study agent because of an injection-site reaction.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    At 48 weeks, evolocumab reduced non-HDL cholesterol levels by 52% and apolipoprotein B levels by 49% as compared with placebo (P<0.001 for both).

    “as compared with placebo, at 48 weeks, evolocumab had reduced non-HDL cholesterol levels by 52% and apolipoprotein B levels by 49% (P<0.001 for both).”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    The rate of urgent coronary revascularization appeared to be more modifiable than that of elective revascularization.

    “Finally, the rate of urgent coronary revascularization appeared to be more modifiable than that of elective revascularization.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    No significant between-group differences were seen in the overall rates of adverse events, serious adverse events, or adverse events thought to be related to the study agent and leading to discontinuation of the study regimen.

    “No significant between-group differences were seen in the overall rates of adverse events, serious adverse events, or adverse events thought to be related to the study agent and leading to discontinuation of the study regimen (Table 3).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    The benefit of evolocumab was consistent across levels of intensity of statin therapy, regardless of ezetimibe use, and with both the dosing regimen of 140 mg every 2 weeks and that of 420 mg monthly.

    “The benefit of evolocumab was also consistent across levels of intensity of statin therapy, regardless of ezetimibe use, and with both the dosing regimen of 140 mg every 2 weeks and that of 420 mg monthly.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingcitation

    The rates of cardiovascular mortality in FOURIER were one third of the rates in the Scandinavian Simvastatin Survival Study (4S).

    “in which the rates of cardiovascular mortality were one third of the rates in the Scandinavian Simvastatin Survival Study (4S).26”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [26] Scandinavian Simvastatin Survival Study Group, 1994, Lancet

      Couldn’t be matched to a paper in Crossref, so it can’t be checked.

  • May combine two claims.

    Findingown data

    Injection-site reactions were rare but were more frequent with evolocumab than with placebo (2.1% vs. 1.6%).

    “Injection-site reactions were rare, but they were more frequent with evolocumab (2.1% vs. 1.6%).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    Achievement of very low LDL cholesterol levels with evolocumab did not lead to any significant differences between the two study groups in overall rates of adverse events or in rates of study-regimen discontinuation.

    “Achievement of these very low LDL cholesterol levels with evolocumab did not lead to any significant differences between the two study groups in the overall rates of adverse events or in rates of study-regimen discontinuation.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductown data

    Randomization was performed in a double-blinded manner with the use of a central computerized system, with stratification according to final screening LDL cholesterol level and region.

    “Randomization was performed in a double-blinded manner with the use of a central computerized system, with stratification according to the final screening LDL cholesterol level (<85 or ≥85 mg per deciliter [<2.2 or ≥2.2 mmol per liter]) and region.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Study design and conductown data

    Premature permanent discontinuation of the study regimen occurred in 12.5% of patients (5.7% per year), withdrawal of consent in 0.7% (0.3% per year), and loss to follow-up in less than 0.1% (0.03% per year), with similar rates in the two study groups.

    “Premature permanent discontinuation of the study regimen occurred in 12.5% of patients (5.7% per year), withdrawal of consent in 0.7% (0.3% per year), and loss to follow-up in less than 0.1% (0.03% per year), with similar rates in the two study groups”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    A central clinical-events committee whose members were unaware of study-group assignments and lipid levels adjudicated all potential efficacy end-point events and cases of new-onset diabetes.

    “A central clinicalevents committee led by the TIMI Study Group, whose members were unaware of study-group assignments and lipid levels, adjudicated all potential efficacy end-point events and cases of new-onset diabetes.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Study design and conductnone given

    All efficacy analyses were conducted on an intention-to-treat basis.

    “All efficacy analyses were conducted on an intentionto-treat basis.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductown data

    The FOURIER trial was a randomized, double-blind, placebo-controlled, multinational clinical trial.

    “The FOURIER trial was a randomized, doubleblind, placebo-controlled, multinational clinical trial in which patients at 1242 sites in 49 countries underwent randomization”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductnone given

    The raw database was provided to the TIMI Study Group, which conducted data analyses independently of the sponsor.

    “The raw database was provided to the Thrombolysis in Myocardial Infarction (TIMI) Study Group, which conducted data analyses independently of the sponsor.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    A total of 27,525 patients (99.9%) received at least one dose of a study agent.

    “A total of 27,525 patients (99.9%) received at least one dose of a study agent.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    Most but not all patients in FOURIER received high-intensity statin therapy.

    “Most but not all of the patients in the trial received high-intensity statin therapy”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    Ezetimibe use was infrequent in FOURIER.

    “and ezetimibe use was infrequent.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    Although the median follow-up period in FOURIER was originally planned to be approximately 4 years, an event rate approximately 50% higher than postulated led to a shorter required duration of follow-up to accrue the prespecified number of events.

    “Although the median follow-up period in FOURIER was originally planned to be approximately 4 years, an event rate that was approximately 50% higher than had been postulated led to a shorter required duration of follow-up to accrue the prespecified number of events.”
    Quote in the paperNot a substantial claim
23 of 23
  • The paper relies on this without support.

    The reduction in cardiovascular events with evolocumab is mediated by the lowering of LDL cholesterol.

    “These findings show that patients with atherosclerotic cardiovascular disease benefit from lowering of LDL cholesterol levels below current targets.”
1 of 1

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The FOURIER open-label extension study reported a 14.0% overall premature discontinuation rate over 5 years among 6,635 patients randomized to evolocumab.

    “Regarding the persistence phase, the FOURIER open-label extension study reported a 14.0% overall premature discontinuation rate over 5 years among 6,635 patients randomized to evolocumab.115,116”

    From Adherence to PCSK9 Inhibitors in Clinical Practice (2026) · cites this paper as [115]

    The Trial Design and Oversight section describes FOURIER as a randomized, double-blind, placebo-controlled trial, not an open-label extension. The Patients section reports 13,784 patients randomized to evolocumab, 12.5% premature permanent discontinuation, and a median follow-up of 26 months—not 6,635 patients, 14.0%, and five years. No page numbers are available in our copy. (LLM, conf=0.89)

    Checked by a reasoning model — may be wrong.

    Experimental — accuracy not yet measured
  • The relative and absolute reductions in MACE observed in this analysis are similar in magnitude to those observed for ezetimibe in IMPROVE-IT and evolocumab in FOURIER, with similarly non-significant reductions in all-cause and cardiovascular mortality.

    “The relative and absolute reductions in MACE observed in our analysis are similar in magnitude to those observed for the seminal IMPROVE-IT [3] and FOURIER [4] trials for ezetimibe and evolocumab respectively, with similarly non-significant reductions in all-cause and cardiovascular mortality.”

    From The Clinical Efficacy and Safety of Bempedoic Acid in Patients at Elevated Risk of Cardiovascular Disease: A Meta-Analysis of Randomized Clinical Trials (2024) · cites this paper as [4]

    Split into 2 atoms — 0 confirmed, 1 partially supported, 1 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Checked by a reasoning model — may be wrong.

    Experimental — accuracy not yet measured
  • Serious safety concerns were not observed with evolocumab in the FOURIER trial, which had no lower limit for allowable LDL cholesterol levels.

    “Serious safety concerns were also not observed with evolocumab in the FOURIER (Further Cardiovascular Outcomes Research with PCSK9 Inhibition in Subjects with Elevated Risk) trial, 11 which had no lower limit for allowable LDL cholesterol levels”

    From Alirocumab and Cardiovascular Outcomes after Acute Coronary Syndrome (2018) · cites this paper as [11]

    The Safety results report nearly identical serious-adverse-event rates with evolocumab and placebo (24.8% versus 24.7%), supporting the absence of an observed serious safety signal during the trial. The Lipid Data section reports that many patients reached very low LDL cholesterol levels, but our copy does not state that the trial had no lower limit for allowable LDL levels. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Clinically approved PCSK9-targeting antibodies, including evolocumab and alirocumab, systemically reduce LDL-C and have shown acceptable tolerability in large cardiovascular outcome studies.

    “This change is not necessarily a toxicity signal, because clinically approved PCSK9-targeting antibodies, including evolocumab and alirocumab, systemically reduce LDL-C and have shown acceptable tolerability in large cardiovascular outcome studies [ 65-67 ].”

    From Restores Aβ Clearance by Overcoming PCSK9–LRP1 Dysregulation and TRIB3‐Mediated Autophagy Blockade in Alzheimer's Disease (2026) · cites this paper as [65]

    The Methods and Results describe a large cardiovascular outcomes trial in which evolocumab lowered LDL-C, with no significant difference in overall adverse events versus placebo except for more injection-site reactions. This paper did not test alirocumab in that trial; it mentions alirocumab only through a cited earlier study, so it does not establish the claim about both antibodies in large outcomes studies. The passages also do not establish their regulatory approval status. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • PCSK9 inhibition safely lowers LDL-C levels (absolute reduction 56 mg/dl, 95% CI 55-57; relative reduction 59%, 95% CI 58-60) and reduces the number of cardiovascular events.

    “Both have unequivocally shown that PCSK9 inhibition safely lowers LDL-C levels [56 mg/dl absolute reduction (95% confidence interval 55–57) or 59% relative reduction (95% confidence interval 58–60)] alone or on top of maximally tolerated lipid-lowering therapies (i.e. high-doses statins with or without ezetimibe) and reduces the number of cardiovascular events.”

    From PCSK9 and the nervous system: a no-brainer? (2023) · cites this paper as [9]

    The Lipid Data section reports a 56 mg/dl absolute LDL-C reduction (95% CI, 55–57) and a 59% relative reduction (95% CI, 58–60). The Discussion reports fewer cardiovascular events and few excess adverse events. However, this trial tested evolocumab on a background of statin therapy in patients with cardiovascular disease; it does not establish the cited effects when PCSK9 inhibition is used alone. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

Cites

Flagged first, then by citations

Research works printed but not linked: 4

  1. Landmesser U, Eur Heart J
  2. Sabatine MS, Eur Heart J
  3. Scandinavian Simvastatin Survival Study Group, 1994, Lancet, 344, 1383
  4. Koren MJ, JAMA Cardiol

Cited by

Sorted by citations

Authors
Sabatine, M. S., Giugliano, R. P., Keech, A. C., Honarpour, N., Wiviott, S. D., Murphy, S. A., Kuder, J. F., Wang, H., Liu, T., Wasserman, S. M., Sever, P. S., & Pedersen, T. R.
Affiliations
Oslo University Hospital (NO)
Venue
New England Journal of Medicine
Published
2017-05-04
Volume
376
Issue
18
Pages
1713-1722
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2596179513
Cited by
6,138
References
28
Citations by year
2026: 628 · 2025: 589 · 2024: 608 · 2023: 635 · 2022: 623 · 2021: 632 · 2020: 658 · 2019: 637 · 2018: 669 · 2017: 443 · 2016: 6 · 2013: 1
FWCI
674.25
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
  • SZTE Publicatio Repozitórium (University of Szeged) (acceptedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, cc-by-nc)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, other-oa)
  • HAL (submittedVersion)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion)
  • BOA (University of Milano-Bicocca) (submittedVersion)
  • Deakin Research Online (Deakin University) (submittedVersion)
  • Figshare (submittedVersion)
  • Open Repository and Bibliography (University of Liège) (submittedVersion)
  • Archivio Istituzionale della Ricerca - Università degli Studi dell Aquila (submittedVersion)
  • Spiral (Imperial College London) (submittedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
  • Use Siena air (University of Siena) (submittedVersion)
  • NORA - Norwegian Open Research Archives (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, cc-by-nc)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • National Institute for Health and Care Research (NF-SI-0513-10059)
  • Medical Research Council (MC_EX_MR/M009203/1, MC_PC_14089)
Topics
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Acute Myocardial Infarction Research
Keywords
evolocumab, PCSK9 inhibition, LDL cholesterol lowering, atherosclerotic cardiovascular disease, cardiovascular events, myocardial infarction, stroke, cardiovascular mortality, statin therapy, LDL cholesterol levels, new-onset diabetes, injection site reactions, primary prevention of cardiovascular disease, LDL-C lowering therapy
MeSH terms
Proprotein Convertase 9, PCSK9 Inhibitors, Aged, Antibodies, Monoclonal, Anticholesteremic Agents, Cardiovascular Diseases, Double-Blind Method, Drug Therapy, Combination, Female, Follow-Up Studies, Humans, Hypercholesterolemia, Cholesterol, LDL, Male, Middle Aged, Incidence, Least-Squares Analysis, Hydroxymethylglutaryl-CoA Reductase Inhibitors, Atherosclerosis, Antibodies, Monoclonal, Humanized

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