ClinicalTrials.gg
TerminatedNCT03309358Updated May 25, 2018

A Study of the Safety and Tolerability of Inhaled SNSP113 in Healthy Subjects and Subjects With Stable Cystic Fibrosis

A Phase 1 interventional study of Inhaled SNSP113 and Inhaled Placebo in Lung Diseases, Pulmonary Disease and Cystic Fibrosis, sponsored by Synspira, Inc.. Terminated at 2 sites in United Kingdom. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-05-25.

Primary conditionCystic FibrosisRegistry: Lung DiseasesReclassifiedWhy we changed it
Registry
Lung Diseases — the first condition term the registry derived for this study.
ClinicalTrials.gg
Cystic Fibrosis
Why
  1. The study's listed conditions name Cystic Fibrosis, a narrower term within Lung Diseases.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Synspira, Inc. · Phase 1, Interventional, and Treatment

Why this study was terminated
Successful completion of Part A. Company decision to end early.

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Phase
Phase 1
Study type
Interventional
Enrollment
32
Allocation
Randomized
Ages
18 Years to 50 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 235 studies in Cystic Fibrosis with a site in United Kingdom — 20 open to participants now, 31 under way, 4 of them phase 3. Cystic Fibrosis · United Kingdom.

Enrollment
124th of 186
32 · median 69
Started
2017
with 20 others
Phase 1
25 of 235
1 open now
Registered
129th of 235
by date

Among the 235 studies in Cystic Fibrosis with a site in United Kingdom, this one is the 124th largest by enrollment of the 186 interventional ones that give a count, is one of 21 that started in 2017, is one of 25 in phase 1, and was the 129th registered.

Cystic Fibrosis

1,621 studies on the registry are indexed under Cystic Fibrosis; 201 are open to participants now.

Browse Cystic Fibrosis studies →

Open to participants now

20 of the 235 studies in Cystic Fibrosis with a site in United Kingdom are open now. Recruiting first, the newest first:

15 more — sign in →

All 20 open studies →

A study can be open while its sites in United Kingdom have not opened yet or have stopped. Only those recruiting at a site in United Kingdom →

Who these studies take

Of the 156 Cystic Fibrosis studies recruiting now, 95 (61%) set no upper age limit and 45 (29%) stop at 75 or younger; 86 take children under 18; 41 take healthy volunteers.

This study: 18 Years to 50 Years · all sexes · healthy volunteers too.

The full table on the hub →

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 235 studies in Cystic Fibrosis with a site in United Kingdom, or all of them as a file.
02

Study summary

Although Cystic Fibrosis is a complex genetic disease affecting many organs, lung disease is the primary cause of mortality. The objective of this study is to determine the safety and tolerability of SNSP113 in healthy subjects and subjects with stable cystic fibrosis.

03

Conditions studied

  • Lung Diseases
  • Pulmonary Disease
  • Cystic Fibrosis
  • Cystic Fibrosis Lung
  • Cystic Fibrosis Pulmonary Exacerbation
  • Cystic Fibrosis With Exacerbation
  • Respiratory Tract Disease
  • Pulmonary Inflammation
  • Multi-antibiotic Resistance
  • Antibiotic Resistant Infection
  • Lung Infection
  • Lung Infection Pseudomonal
  • Lung; Infection, Atypical Mycobacterium
  • Burkholderia Infections
  • Burkholderia Cepacia Infection
  • Lung Inflammation

Keywords

  • Cystic Fibrosis
  • Pulmonary exacerbation
  • Pulmonary inflammation
  • Respiratory tract disease
  • Pulmonary disease
  • Biofilms
04

In context

Cystic Fibrosis Reclassified

1,621 studies on the registry are indexed under Cystic Fibrosis; 201 are open to participants now.

This study's enrollment of 32 is below the median of 36 across 1,053 interventional studies indexed under Cystic Fibrosis.

Browse Cystic Fibrosis studies →

Lead sponsor

This is the only study on the registry with Synspira, Inc. as lead sponsor.

Compared within Cystic Fibrosis, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Lung Diseases. The counts are of registry records indexed under each term, refreshed daily. How we classify →

05

Who can participate

Ages eligible
18 Years to 50 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

Part A

  • Healthy male adults ≥18 and ≤50 years of age at screening.
  • Baseline 80-120% of predicted at Screening.
  • Oxygen saturation of ≥ 96% on room air as determined by pulse oximetry at Screening.
  • Screening laboratory tests within normal limits.

Part B

  • Female and Male subjects who are ≥18 years of age and a confirmed diagnosis of CF.
  • FEV1 >50% of predicted.
  • Oxygen saturation of ≥ 94% on room air as determined by pulse oximetry at Screening.
  • Stable CF pulmonary disease as judged by the Investigator.

Exclusion criteria

Exclusion Criteria:

Part A

  • Any history of any form of lung disease or any systemic disease that may affect the lung or pulmonary function.
  • Former regular smoker or has smoked tobacco or cannabis products within the last 30 days.
  • Any history of any form of liver disease, renal disease, cardiac disease, hematologic disease, neurologic disease, atopy or any chronic condition.
  • Participation in one or more healthy subject studies within the prior 3 months.

Part B

  • Participation in a clinical trial involving receipt of an product within the 30 days prior to screening.
  • Female subjects who are pregnant (a negative serum pregnancy test must be demonstrated at screening), have a positive pregnancy test, are lactating or who plan to become pregnant within 90 days after dosing.
  • Subjects requiring supplemental oxygen.
  • Hemoptysis of >5 mL within 12 weeks of screening.
  • Listed for organ transplantation.
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

FEV1

From a breathing test (spirometry): how much air you can blow out in the first second. Often given as a percentage of what is expected for your age, height and sex.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

06

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Sequential assignment
Masking
Double (Participant, Investigator)
Enrollment
32 participants (actual)

Study arms

  • Experimental
    Inhaled SNSP113

    Drug: Inhaled SNSP113

  • Placebo comparator
    Inhaled Placebo

    Drug: Inhaled Placebo

Interventions

  • DrugInhaled SNSP113

    A single ascending dose of inhaled SNSP113 will be administered to healthy subjects and subjects with stable cystic fibrosis.

  • DrugInhaled Placebo

    A single dose of inhaled placebo control will be administered to healthy subjects and subjects with stable cystic fibrosis.

07

What researchers measure

Primary outcomes

  1. Incidence of adverse events

    To determine the incidence of treatment related adverse events.

    Time frame: 8 days

  2. Spirometry

    To assess change from baseline spirometry.

    Time frame: 8 days

  3. Pulse Oximetry

    To assess change in baseline pulse oximetry

    Time frame: 8 days

Secondary outcomes

  1. Observed maximum plasma concentration, taken directly from the individual concentration-time curve (Cmax)

    To characterize the pharmacokinetics of SNSP113

    Time frame: Days 1, 2 and 8

  2. Area under concentration-time curve from time zero extrapolated to infinity (AUC)

    To characterize the pharmacokinetics of SNSP113

    Time frame: Days 1, 2 and 8

08

Study locations

2 sites
  • Royal Brompton Hospital
    London, England SW3 6NP, United Kingdom
  • Celerion
    Belfast, Northern Ireland BT9 6AD, United Kingdom
09

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Sep 2017 to primary completion in Dec 2017, 2 months.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 5, 2017
First posted
Oct 13, 2017
StartActual
Sep 28, 2017
Primary completionActual
Dec 18, 2017
CompletionActual
Dec 18, 2017
Last update
May 25, 2018
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 25, 2018, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03309358
Lead sponsor
Synspira, Inc.
Responsible party
Sponsor
First posted
Oct 13, 2017
Start date
Sep 28, 2017
Primary completion
Dec 18, 2017
Completion
Dec 18, 2017
Last update
May 25, 2018

Study contacts

Maria Theresa Basco, MD, MPH
study director · Synspira, Inc.

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in May 2018. You cannot join it, but the record below documents what was studied.

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