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COVID-19Phase 1Bacterial ACE2NCT04375046

Recombinant Bacterial ACE2 Receptors -Like Enzyme of B38-CAP Could be Promising Treatment for COVID-19 Infection- and Its Inflammatory Complications Better Than Recombinant Human ACE2

A Phase 1 study testing Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP (rbACE2) in people with COVID-19, run by Kafrelsheikh University.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP could be promising treatment for COVID-19 infection- and Its inflammatory complications better than recombinant human ACE2 Mahmoud ELkazzaz(1),Tamer Haydara(2),Yousry Abo-amer(3), Quan Liu(4) 1. Read more about this study

Who is it for?
Ages 18 to 80 years
Conditions the study is for
COVID-19
What is being tested?
Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP (rbACE2)
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
24 participants
Where
No sites listed yet
Study dates
Jul 2021to Oct 2021
Phase
Phase 1
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 80 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Laboratory diagnosis:
  • Respiratory specimen is positive for SARS-CoV-2 nucleic acid by RT-PCR; OR, The viral gene sequencing of the respiratory specimen is highly homologous to known novel coronavirus.
  • Fever:
  • Axillary temperature >37.3℃
  • Respiratory variables (meets one of the following criteria):
  • Respiratory rate: RR ≥25 breaths/min
Show all 12Show fewer
  • Oxygen saturation ≤93% at rest on room air
  • PaO2/FiO2 ≤300 mmHg(1 mmHg=0.133 KPa)
  • Pulmonary imaging showed that the lesions progressed more than 50% within 24-48 hours, and the patients were managed as severe
  • HBsAg negative, or HBV DNA ≤10^4 copy/ml if HBsAg positive; anti-HCV negative; HIV negative two weeks prior to signed Informed Consent Form (ICF)
  • Appropriate ethics approval and
  • ICF -

Who cannot join

  • Age <18 years; Age >80 years
  • Pregnant or breast feeding woman or with positive pregnancy test result P/F <100 mmHg
  • Moribund condition (death likely in days) or not expected to survive for >7 days Refusal by attending MD
  • Not hemodynamically stable in the preceding 4 hours (MAP ≤65 mmHg, or SAP <90 mmHg, DAP <60 mmHg, vasoactive agents are required)
  • Patient on invasive mechanical ventilation or ECMO
  • Patient in other therapeutic clinical trial within 30 days before ICF
Show all 13Show fewer
  • Receive any other ACE inhibitors (ACEI), angiotensin-receptor blockers (ARB) treatment within 7 days before ICF
  • Chronic immunosuppression: current autoimmune diseases or patients who received immunotherapy within 30 days before ICF
  • Hematologic malignancy (lymphoma, leukemia, multiple myeloma)
  • Other patient characteristics (not thought to be related to underlying COVID-19) that portend a very poor prognosis (e.g, severe liver failure, and ect)
  • Known allergy to study drug or its ingredients related to renin-angiotensin system (RAS), or frequent and/or severe allergic reactions with multiple medications
  • Other uncontrolled diseases, as judged by investigators
  • Body weight ≥85 kg

Trial locations and contacts

No sites are listed yet.

M.Sc.Mahmoud Elkazzaz, M.Sc.Biochemistry contact

00201090302015

mahmoudramadan2051@yahoo.com

About this study

Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP could be promising treatment for COVID-19 infection- and Its inflammatory complications better than recombinant human ACE2

Mahmoud ELkazzaz(1),Tamer Haydara(2),Yousry Abo-amer(3), Quan Liu(4)

Read more
  1. Department of chemistry and biochemistry, Faculty of Science, Damietta University, Egypt.
  2. Department of Internal Medicine, Faculty of Medicine, Kafrelsheikh University, Egypt
  3. Hepatology,Gastroenterology and Infectious Diseases Department, Mahala Hepatology Teaching Hospital, Egypt
  4. School of Life Sciences and Engineering, Foshan University, Foshan, Guangdong Province; Laboratory of Emerging Infectious Disease, Institute of Translational Medicine, The First Hospital of Jilin University, Changchun, China.

Abstract

The COVID-19 pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has infected over 100 million people causing over 2.4 million deaths over the world, and it is still expanding. There is an urgent need for targeted and effective COVID-19 treatments which has put great pressure on researchers across the world for developing effective drugs. This paper reviews the possibility of using Recombinant Bacterial ACE2 Receptors -Like Enzyme of B38-CAP to treat SARS-CoV-2 based on the intracellular mechanism of SARS-CoV-2 transmission and consequences caused. Angiotensin-converting enzyme 2 (ACE2) plays a key role in cardiovascular physiology and pathology, and it's being currently being investigated as a potential covid-19 and acute lung failure treatment through several clinical trials.. The SARS-CoV2 binding site was identified as ACE2, a part of the RAAS, which is known to protect the lung from injuries. it has been postulated that SARS-CoV-2 binding to ACE2 may attenuate residual ACE2 activity, skewing the ACE/ACE2 balance to a state of heightened angiotensin II activity leading to inflammatory and oxidative organ damage, as well as pulmonary vasoconstriction, which can lead to acute lung injury.. Therefore, treatment with recombinant soluble ACE2 protein and drugs that up regulate ACE2 may alleviate pulmonary complication. In animal models including heart failure, acute lung injury, and diabetic nephropathy, recombinant human ACE2 protein (rhACE2), which is devoid of its membrane-anchored domain thus soluble, has been shown to have beneficial effects. Despite its positive effects, rhACE2 is a glycosylated protein, which necessitates a time- and cost-intensive protein expression system using mammalian or insect cells, which may be inconvenient in drug production and medical economics. Moreover, we hypothesis that treating COVID-19 patients with recombinant soluble ACE2 protein may induce autoantibodies and T cells to cellular ACE2.Furthermore, rhACE2 may interact with spike protein based vaccine and worsen its effect . These autoantibodies may generated by enforced presentation of the soluble Angiotensin-converting enzyme 2 (ACE2) protein in a complex with COVID-19 Spike protein in fragment crystallizable (FC) Receptor positive Antigen Presenting Cells in the blood The development of autoantibodies might make injury and damage to the host epithelial cells and hamper their ACE2 dependent function in lungs, intestine and testes which express ACE2. In addition to inducing platelet aggregation and thrombosis . Although it has been stated that immune response associated with the chronic infusion of rhACE2 resulting in the degradation of rhACE226, this was not the case with B38-CAP; no antibodies against B38-CAP were detected in the serum of mice infused with B38-CAP for two weeks... In this case we suggest that bacterial engineering could be used to develop better protein drugs for COVID-19 treatment... B38-CAP is an ACE2-like enzyme derived from bacteria that reduces hypertension and cardiac dysfunction. Angiotensin-converting enzyme 2 (ACE2) plays a key role in cardiovascular physiology and pathology, and it is currently being studied in clinical trials to treat acute lung failure. In mice, B38-CAP treatment prevented angiotensin II-induced hypertension, cardiac hypertrophy, and fibrosis. B38-CAP is an ACE2-like enzyme derived from bacteria, demonstrating that evolution has shaped a bacterial carboxypeptidase (B38-CAP) to a human ACE2-like enzyme. As a result, we think that treating COVID-19-infected patients with Bacterial ACE2 like enzymes, rather than human ACE2, may be preferable because it will perform the same role as human ACE2 and may not be recognized by COVID-19 spike protein

Keywords: COVID 2019 ,Infection, B38-CAP , Bacterial ACE2 receptors -like enzyme , rhACE226.

Read the detailed description

Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP could be promising treatment for COVID-19 infection- and Its inflammatory complications better than recombinant human ACE2

This is a small pilot study investigating whether there is any efficacy signal that warrants a larger Phase 2B trial, or any harm that suggests that such a trial should not be done. It is not expected to produce statistically significant results in the major endpoints. The investigator will examine all of the biologic, physiological, and clinical data to determine whether a Phase 2B trial is warranted.

Primary efficacy analysis will be carried only on patients receiving at least 4 doses of active drug. Safety analysis will be carried out on all patients receiving at least one dose of active drug.

It is planned to enroll more than or equal to 24 subjects with COVID-19. It is expected to have at least 12 evaluable patients in each group.

Experimental group: 0.4 mg/kg rbACE2 IV BID and standard of care Control group: standard of care Intervention duration: up to 7 days of therapy No planned interim analysis.

Conditions
COVID-19
Being tested
Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP (rbACE2)
Keywords
COVID 2019 ,Infection, B38-CAP , Bacterial ACE2 receptors -like enzyme , rhACE226
Medical subject headings
COVID-19

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP (rbACE2)Drug

    In this study, the experimental group will receive 0.4 mg/kg rbACE2 IV

Study groups in NCT04375046
Study groupRoleWhat they receive
Experimental: rbACE2 groupExperimental0.4 mg/kg IV BID for 7 days (unblinded) + standard of care
Receives: Drug: Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP (rbACE2)
No Intervention: Control groupNo interventionStandard of care; no placebo

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Time course of body temperature (fever)

    Compare the time course of body temperature (fever) between two groups over time.

    Measured: 14 days

  2. Viral load over time

    Compare viral load between two groups over time.

    Measured: 14 days

Secondary outcomes (25)
  1. P/F ratio over time

    PaO2/FiO2 ratio

    Measured: 14 days

  2. Sequential organ failure assessment score(SOFA score) over time

    SOFA, including assessment of respiratory, blood, liver, circulatory, nerve, kidney, from 0 to 4 scores in each systems, the higher scores mean a worse outcome.

    Measured: 14 days

  3. Pulmonary Severity Index (PSI)

    Measured: 14 days

  4. Image examination of chest over time

    Based on radiologist's assessment of inflammatory exudative disease, category as follows: significant improvement, partial improvement, no improvement, increase of partial exudation, significant increase in exudation, unable to judge.

    Measured: 14 days

  5. Proportion of subjects who progressed to critical illness or death

    Measured: 14 days

  6. Time from first dose to conversion to normal or mild pneumonia

    Measured: 14 days

  7. T-lymphocyte counts over time

    Measured: 14 days

  8. C-reactive protein levels over time

    Measured: 14 days

  9. Angiotensin II (Ang II) changes over time

    Measured: 14 days

  10. Angiotensin 1-7 (Ang 1-7) changes over time

    Measured: 14 days

  11. Angiotensin 1-5 (Ang 1-5) changes over time

    Measured: 14 days

  12. Renin changes over time

    Measured: 14 days

  13. Aldosterone changes over time

    Measured: 14 days

  14. Angiotensin-converting enzyme (ACE) changes over time

    Measured: 14 days

  15. Angiotensin-converting enzyme 2 (ACE2) changes over time

    Measured: 14 days

  16. Interleukin 6 (IL-6) changes over time

    Measured: 14 days

  17. Interleukin 8 (IL-8) changes over time

    Measured: 14 days

  18. Soluble tumor necrosis factor receptor type II (sTNFrII) changes over time

    Measured: 14 days

  19. Plasminogen activator inhibitor type-1 (PAI-1) changes over time

    Measured: 14 days

  20. Von willebrand factor (vWF) changes over time

    Measured: 14 days

  21. Tumor necrosis factor-α (TNF-α) changes over time

    Measured: 14 days

  22. Soluble receptor for advanced glycation end products (sRAGE) changes over time

    Measured: 14 days

  23. Surfactant protein-D (SP-D) changes over time

    Measured: 14 days

  24. Angiopoietin-2 changes over time

    Measured: 14 days

  25. Frequency of adverse events and severe adverse events

    Measured: 14 days

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted5 May 2020
  2. Study startJul 2021 (estimated)
  3. Primary completionAug 2021 (estimated)
  4. Study completionOct 2021 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
24 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04375046
Sponsor's protocol ID
proposed by Mahmoud kazazzaz
Acronym
Bacterial ACE2
Status last verified
Jun 2021
First submitted
1 May 2020
Last updated
9 Jun 2021
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Recombinant Bacterial ACE2 receptors -like enzyme of B38-CAP (rbACE2) in people with COVID-19, run by Kafrelsheikh University.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 12 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: status not confirmed, as of the sponsor's last update on 9 Jun 2021. Status can change between updates, so confirm with the study contact before making plans.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

Contact M.Sc.Mahmoud Elkazzaz, M.Sc.Biochemistry (00201090302015, mahmoudramadan2051@yahoo.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Time course of body temperature (fever) (time frame: 14 days). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 9 Jun 2021.

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