Cathflo® Activase® (Alteplase) is a tissue plasminogen activator (t-PA) produced by recombinant DNA technology. It is a sterile, purified glycoprotein of 527 amino acids. It is synthesized using the complementary DNA (cDNA) for natural human tissue-type plasminogen activator (t-PA) obtained from an established human cell line. The manufacturing process involves secretion of the enzyme Alteplase into the culture medium by an established mammalian cell line (Chinese hamster ovary cells) into which the cDNA for Alteplase has been genetically inserted. Fermentation is carried out in a nutrient medium containing the antibiotic gentamicin sulfate, 100 mg/L. The presence of the antibiotic is not detectable in the final product.
Cathflo® Activase® (Alteplase) is indicated for the restoration of function to central venous access devices as assessed by the ability to withdraw blood.
Published Studies Related to Cathflo Activase (Alteplase)
Statistical aspects of the TNK-S2B trial of tenecteplase versus alteplase in acute ischemic stroke: an efficient, dose-adaptive, seamless phase II/III design. [2011.08]
BACKGROUND: TNK-S2B, an innovative, randomized, seamless phase II/III trial of tenecteplase versus rt-PA for acute ischemic stroke, terminated for slow enrollment before regulatory approval of use of phase II patients in phase III. PURPOSE: (1) To review the trial design and comprehensive type I error rate simulations and (2) to discuss issues raised during regulatory review, to facilitate future approval of similar designs... CONCLUSIONS: (1) The design was innovative and efficient. Per protocol, type I error was well controlled for the co-primary phase III hypothesis tests, and experiment-wise. (2a) Time must be allowed for communications with regulatory reviewers from first design stages. (2b) Adequate type I error control must be demonstrated. (2c) Greater clarity is needed on (i) whether this includes demonstration of type I error control if the protocol is violated and (ii) whether simulations of type I error control are acceptable. (2d) Regulatory agency concerns that protocols for futility stopping may not be followed may be allayed by submitting interim analysis results to them as these analyses occur.
SYNTHESIS expansion: design of a nonprofit, pragmatic, randomized, controlled trial on the best fast-track endovascular treatment vs. standard intravenous alteplase for acute ischemic stroke. [2011.06]
Rationale Reperfusion in ischemic stroke can be pursued by either systemic intravenous thrombolysis or endovascular treatment. However, systemic intravenous thrombolysis with alteplase within 4.5 h of symptom onset in selected patients is the only medication of proven efficacy... Secondary: neurological deficit seven-days after thrombolysis and the safety of the procedure on the basis of events reported within seven-days following thrombolysis - symptomatic cerebral hemorrhage, fatal and nonfatal stroke, death from any cause, neurological deterioration.
Statistical aspects of the TNK-S2B trial of tenecteplase versus alteplase in
acute ischemic stroke: an efficient, dose-adaptive, seamless phase II/III design. 
facilitate future approval of similar designs... CONCLUSIONS: (1) The design was innovative and efficient. Per protocol, type I
Implementation and outcome of thrombolysis with alteplase 3-4.5 h after an acute stroke: an updated analysis from SITS-ISTR. [2010.09]
BACKGROUND: In September, 2008, the European Acute Stroke Study III (ECASS III) randomised trial and the Safe Implementation of Treatment in Stroke-International Stroke Thrombolysis Registry (SITS-ISTR) observational study reported the efficacy and safety of the extension of the time window for intravenous alteplase treatment from within 3 h to within 4.5 h after stroke onset. We aimed to assess the implementation of the wider time window, its effect on the admission-to-treatment time, and safety and functional outcome in patients recorded in SITS-ISTR... INTERPRETATION: Since October, 2008, thrombolysis within 3-4.5 h after stroke has been implemented rapidly, with a simultaneous increase in the number of patients treated within 3 h; admission-to-treatment time has not increased. Safety and functional outcomes are less favourable after 3 h, but the wider time window now offers an opportunity for treatment of those patients who cannot be treated earlier. Thrombolysis should be initiated within 4.5 h after onset of ischaemic stroke, although every effort should be made to treat patients as early as possible after symptom onset. FUNDING: Boehringer Ingelheim, Ferrer, the European Union Public Health Executive Authority, and Medical Training and Research (ALF) from Stockholm County Council and Karolinska Institutet. Copyright 2010 Elsevier Ltd. All rights reserved.
Stroke treatment with alteplase given 3.0-4.5 h after onset of acute ischaemic stroke (ECASS III): additional outcomes and subgroup analysis of a randomised controlled trial. [2009.12]
BACKGROUND: In the European Cooperative Acute Stroke Study III (ECASS III), alteplase administered 3.0-4.5 h after the onset of stroke symptoms resulted in a significant benefit in the primary endpoint (modified Rankin scale [mRS] score 0-1) versus placebo, with no difference in mortality between the treatment groups. Compared with the 0-3 h window, there was no excess risk of symptomatic intracranial haemorrhage. We assessed the usefulness of additional endpoints and did subgroup and sensitivity analyses to further investigate the benefit of alteplase... INTERPRETATION: Our results support the use of alteplase up to 4.5 h after the onset of stroke symptoms across a broad range of subgroups of patients who meet the requirements of the European product label but miss the approved treatment window of 0-3 h. FUNDING: Boehringer Ingelheim.
Clinical Trials Related to Cathflo Activase (Alteplase)
Cathflo Activase Pediatric Study [Completed]
This was a Phase IV, open-label, single-arm, multicenter trial that was to be conducted at
~60 sites in the United States. Approximately 300 pediatric subjects with dysfunctional
CVADs (including catheters with valves, multiple lumens, umbilical catheters, and implanted
ports) were to be treated with up to two serially instilled doses of Cathflo Activase.
Clot Lysis: Evaluating Accelerated Resolution of Intraventricular Hemorrhage Phase III [Recruiting]
The overall objective of this Phase III clinical trial is to obtain information from a
population of 500 ICH subjects with intraventricular hemorrhage (IVH), representative of
current clinical practice and national demographics of ICH regarding the benefit (or lack
thereof) of IVH clot removal on subject function as measured by modified Rankin Scale (mRS).
This application requests funding for five years to initiate a Phase III randomized
clinical trial (RCT) testing the benefit of clot removal for intraventricular hemorrhage.
The investigators propose to compare extraventricular drainage (EVD) use plus recombinant
tissue plasminogen activator (rt-PA, Cathflo® Activase® Genentech, Inc., San Francisco, CA)
with EVD+ placebo in the management and treatment of subjects with small intracerebral
hemorrhage (ICH) and large intraventricular hemorrhage (IVH defined as ICH < 30 cc and
obstruction of the 3rd or 4th ventricles by intraventricular blood clot).
Phase II Clinical Trial on Treatment of Intraventricular Hemorrhage [Recruiting]
The specific objective of this trial is to determine the lowest dose possible with the best
pharmacokinetic and safety profile and it's ability to remove a blood clot from the
Prolonged Hemodialysis Catheter Survival With Copolymer Coating and Rt-PA [Recruiting]
Surface thrombogenicity of standard double lumen catheters (stDLC) and surface modified
film-coated domain structured double lumen catheters (fcDLC) consisting of a novel reactive
polyurethane copolymer coating showed that in vitro measured surface thrombogenicity was
reduced in the modified catheter compared with standard catheter. The clinical investigation
revealed that both number of days before catheter removal according to clinical requirements
and number of treatments per catheter were significantly higher with the modified catheter
as compared with the standard catheter.
Recombinant tissue plasminogen activator (rt-PA) has been used primarily to treat catheter
thrombosis. The relatively high cost of rt-PA and its theoretical potential to cause
bleeding, as well as the morbidity and mortality associated with catheter malfunction and
infection, justify the need for more definitive evidence of the efficacy of rt-PA as a
No study aims to evaluate the impact of rt-PA locking in long-term Hemodialysis (HD)
uncuffed catheters survival.
Safety and Efficacy of the Use of Tissue Plasminogen Activator (tPA) in Intra-Abdominal Collections in Children - A Prospective Study [Recruiting]
The objective of this study is to establish the efficacy of tPA when used in pediatric
intra-abdominal abscesses immediately after percutaneous drainage, irrespective of the
ultrasound appearance or consistency of the drained fluid.
Reports of Suspected Cathflo Activase (Alteplase) Side Effects
Diabetes Mellitus (2),
Skin Reaction (2),
Pruritus Generalised (2),
Hair Growth Abnormal (2),
Skin Disorder (2),
Nail Growth Abnormal (2), more >>
Page last updated: 2013-02-10