Protocol - Biomarker of exposure to nicotine-containing products - Serum
Description
Cotinine in serum or plasma is best measured by liquid chromatography - tandem mass spectrometry (LC-MS/MS).
Specific Instructions
Because of the sensitive nature of this assay, analysts cannot be actively using tobacco products, and measurements must be performed in a smoke-free environment.
Safety Precautions: Personal protective equipment (PPE) including eye protection, gloves and suitable protective clothing when used to extract and process samples.
Availability
Protocol
Liquid chromatography – tandem mass spectrometry (LC-MS/MS) is the preferred method to accurately measure cotinine in serum or plasma samples, especially when used to assess secondhand smoke exposure (see source references 1, 2, and 3 for details). The limit of quantitation is 0.02 ng/mL. The optimal cutpoint for distinguishing people who smoke from those who do not is 3-10 ng/ml (see source reference 4).
Note that this range related to background population exposure to secondhand smoke and to some degree metabolic differences. When background secondhand smoke exposure is low, the cutpoint is low.
Personnel and Training Required
Laboratory training in the use of liquid chromatography and tandem mass spectrometry is required, as well as general laboratory training on the safe use of chemicals and solvents.
Equipment Needs
This method requires high-performance liquid chromatography and tandem mass spectrometry on a triple quadrupole mass spectrometer.
Requirements
| Requirement Category | Required |
|---|---|
| Major equipment | No |
| Specialized training | Yes |
| Specialized requirements for biospecimen collection | No |
| Average time of greater than 15 minutes in an unaffected individual | No |
Mode of Administration
Bioassay
Lifestage
Child, Adolescent, Adult
Participants
All participants who can provide a blood sample who are 3 years old and older.
Selection Rationale
Cotinine is a major metabolite of nicotine that can be used as a marker for active smoking and as an index for SHS exposure, otherwise known as passive smoking. Cotinine generally is preferred over nicotine for such assessments because of its substantially longer half-life. The estimated half-life of cotinine in plasma is about 15-20 hours; by contrast, the half-life of nicotine is only 0.5-3 hours. Cotinine can be measured in serum, urine, or saliva-the half-life of cotinine in all three fluids is essentially the same (1).
There are other assays (e.g., gas chromatography (GC), gas chromatography mass spectrometry (GC-MS), radioimmunoassay and enzyme-linked immunosorbent assays) used to measure cotinine but liquid chromatography – tandem mass spectrometry (LC-MS/MS) is preferred, especially when used to assess secondhand smoke exposure.
Language
English
Standards
| Standard | Name | ID | Source |
|---|
Derived Variables
None
Process and Review
The Tobacco Regulatory Research (TRR) Content Expert Panel (CEP) reviewed the measures in the Tobacco Regulatory Research collection in February 2024.
Guidance from the TRR CEP includes:
- Replaced protocol
- New Data Dictionary
Previous version in Toolkit archive (link)
Protocol Name from Source
Bernert JT, et al. Interlaboratory comparability of serum cotinine measurements at smoker and nonsmoker concentration levels: a round-robin study. Nicotine Tob Res, 2009
Source
Bernert JT, Jacob P 3rd, Holiday DB, Benowitz NL, Sosnoff CS, Doig MV, Feyerabend C, Aldous KM, Sharifi M, Kellogg MD, Langman LJ. Interlaboratory comparability of serum cotinine measurements at smoker and nonsmoker concentration levels: a round-robin study. Nicotine Tob Res. 2009 Dec;11(12):1458-66. doi: 10.1093/ntr/ntp161. Epub 2009 Nov 23. PMID: 19933777, PMC3167685
Sosnoff CS, Caron K, Akins JR, Dortch K, Hunter RE, Pine BN, Feng J, Blount BC, Li Y, van Bemmel DM, Kimmel HL, Edwards KC, Goniewicz ML, Hatsukami DK, de Castro BR, Bernert JT, Arnstein S, Borek N, Deng-Bryant Y, Mishina E, Lawrence C, Hyland A, Hecht SS, Conway KP, Pirkle JL, Wang Serum Concentrations of Cotinine and Trans-3-Hydroxycotinine in US Adults: Results From Wave 1 (2013-2014) of the Population Assessment of Tobacco and Health Study. L. Nicotine Tob Res. 2022 Mar 26;24(5):736-744. doi: 10.1093/ntr/ntab240. PMID: 34897512, PMC8962725.
Jacob P 3rd, Yu L, Duan M, Ramos L, Yturralde O, Benowitz NL. Determination of the nicotine metabolites cotinine and trans-3-hydroxycotinine in biologic fluids of smokers and non-smokers using liquid chromatography-tandem mass spectrometry: biomarkers for tobacco smoke exposure and for phenotyping cytochrome P450 2A6 activity. J Chromatogr B Analyt Technol Biomed Life Sci. 2011 Feb 1;879(3-4):267-76. doi: 10.1016/j.jchromb.2010.12.012. Epub 2010 Dec 21. PMID: 21208832, PMC3050598.
4. Benowitz NL, Bemert JT, Foulds J, Hecht SS, Jacob P 3rd, Jarvis MJ, Joseph A, Oncken C, Piper ME. Biochemical verification of tobacco use and abstinence: 2019 update. Nicotine Tob Res. 2020; 22(7):1086-97. doi: 10.1093/ntr/ntz132
General References
Avila-Tang E, Al-Delaimy WK, Ashley DL, Benowitz N, Bernert JT, Kim S, Samet JM, Hecht SS. (2013). Assessing secondhand smoke using biological markers. Tob Control, 22(3): 164-871.
Jarvis, M. J., Russell, M. A. H., Benowitz, N. L., & Feyerabend, C. (1988). Elimination of cotinine from body fluids: Implications for noninvasive measurement of tobacco smoke exposure. American Journal of Public Health, 78, 696-698.
Bernert, J. T., Turner, W. E., Pirkle, J. L., Sosnoff, C. S., Akins, J. R., Waldrep, M. K., et al. (1997). Development and validation of a sensitive method for determination of serum cotinine in smokers and nonsmokers by liquid chromatography / atmospheric pressure ionization tandem mass spectrometry. Clinical Chemistry, 43, 2281-2291.
Protocol ID
91709
Variables
Export Variables| Variable Name | Variable ID | Variable Description | dbGaP Mapping | |
|---|---|---|---|---|
| PX091709_Biomarker_Of_Exposure_To_Nicotine_Containing_Products_Serum_Concentration | ||||
| PX091709010000 | Concentration of analyte | N/A | ||
| PX091709_Biomarker_Of_Exposure_To_Nicotine_Containing_Products_Serum_Make_Manufacturer_Equipment | ||||
| PX091709020000 | Make and manufacturer of equipment | N/A | ||
| PX091709_Biomarker_Of_Exposure_To_Nicotine_Containing_Products_Serum_Repeatability_Coefficients_Variation | ||||
| PX091709030000 | What is the repeatability and coefficients more | N/A | ||
Measure Name
Biomarker of exposure to nicotine-containing products
Release Date
October 31, 2024
Definition
Cotinine is a major metabolite of nicotine and is an indicator of exposure to nicotine from tobacco or other nicotine containing products.
Purpose
To assess smoking and environmental tobacco smoke (ETS) exposure by measuring cotinine, a metabolite of nicotine. To screen for tobacco use and quantity and to estimate exposure to secondhand smoke (SHS) and all tobacco exposure. Also used as an outcome measure in smoking cessation trials to determine if an individual has quit smoking.
Keywords
biomarker of exposure to nicotine-containing products - serum, cotinine, Respiratory, Liquid Chromatography – Tandem mass spectrometry (LC-MS/MS), LC-MS/MS, Cigarette smoking, secondhand smoke
Measure Protocols
| Protocol ID | Protocol Name |
|---|---|
| 91707 | Biomarker of exposure to nicotine-containing products - Urine |
| 91708 | Biomarker of exposure to nicotine-containing products - Saliva |
| 91709 | Biomarker of exposure to nicotine-containing products - Serum |
Publications
There are no publications listed for this protocol.