Development and qualification of an LC-MS/MS method for the quantification of MUC5AC and MUC5B mucins in spontaneous human sputum

Abstract

Aim: Airway mucins are promising biomarkers in respiratory diseases. In this study, we aimed to identify a suitable sputum collection and processing method, as well as qualify a bioanalytical method for soluble MUC5AC and MUC5B quantification in clinical samples. Method: Mucins were quantified in induced and spontaneous sputum collected from the same COPD patients and following various sample processing procedures. Our LC-MS/MS method used truncated recombinant mucins as surrogate analytes and a surrogate matrix approach. Results: Frozen spontaneous sputum was found to be a suitable and convenient matrix for mucin quantification and fit-for-purpose method qualification was performed. Conclusion: Our methodology provides accurate and reliable MUC5AC and MUC5B quantification and facilitates multi-site clinical studies in COPD and potentially other respiratory diseases.

Competing Interest Statement

W.S., S.M., C.H., A.K., I.C.S., M.G., H.K., J.H.L., K.C., A.I.R. are or were employees of AstraZeneca at the time this work was conducted and may hold stock ownership and/or stock options or interests in the company. D.V., W.W., A.W., K.S., M.Y., W.R.M. performed work while employed by PPD, a part of Thermo Fisher Scientific. The authors employment and stock investments do not affect the authenticity and objectivity of the experimental results detailed in this manuscript.

Funding Statement

AstraZeneca provided funding to PPD for the conduct of this study

Author Declarations

I confirm all relevant ethical guidelines have been followed, and any necessary IRB and/or ethics committee approvals have been obtained.

Yes

The details of the IRB/oversight body that provided approval or exemption for the research described are given below:

This research was approved by local ethics committees (Manchester South, UK; REC reference 06/Q1403/156) and all patients provided written informed consent.

I confirm that all necessary patient/participant consent has been obtained and the appropriate institutional forms have been archived, and that any patient/participant/sample identifiers included were not known to anyone (e.g., hospital staff, patients or participants themselves) outside the research group so cannot be used to identify individuals.

Yes

I understand that all clinical trials and any other prospective interventional studies must be registered with an ICMJE-approved registry, such as ClinicalTrials.gov. I confirm that any such study reported in the manuscript has been registered and the trial registration ID is provided (note: if posting a prospective study registered retrospectively, please provide a statement in the trial ID field explaining why the study was not registered in advance).

Yes

I have followed all appropriate research reporting guidelines, such as any relevant EQUATOR Network research reporting checklist(s) and other pertinent material, if applicable.

Yes

Data Availability

All relevant data required to replicate the study are within the paper and the supplemental information. Raw data can be obtained in accordance with data sharing policy of AstraZeneca described at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

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