A number of
studies have suggested that nicotine may have beneficial effects in Alzheimers
disease (1), but nicotine is not so beneficial in the lung. Small airway
obstruction with viscous mucus is correlated with lung decline in COPD
patients, and nicotine is known to promote mucus hypersecretion (2). In a recent study in AJP Lung by Chen et al. (http://ajplung.physiology.org/content/early/2014/05/14/ajplung.00396.2012), the authors suggest that nicotine does more than that. They show that
nicotine directly interacts with the mucins and affects their hydration
properties and leads to higher mucus viscosity as monitored by multiple
particle tracking techniques. The study is important because poor hydration of
mucins is closely correlated with increased bacterial infections and lung
function decline in COPD patients (3) and
supports the view that even second-hand cigarette smoke has harmful effects.
1. Baldinger SL, and Schroeder DJ. Nicotine Therapy in Patients with
Alzheimers-Disease. Ann Pharmacother 29:
314-315, 1995.
2. Lang M, Hummer B,
and Hahn HL. Effect of systemic nicotine on mucus secretion from tracheal
submucosal glands and on cardiovascular, pulmonary, and hematologic variables. Klinische Wochenschrift 66 Suppl 11:
170-179, 1988.
3. Vestbo J, Prescott
E, and Lange P. Association of chronic mucus hypersecretion with FEV1
decline and chronic obstructive pulmonary disease morbidity. Copenhagen City
Heart Study Group. American journal of
respiratory and critical care medicine 153: 1530-1535, 1996.
The
following articles on this topic were published in AJP-Lung during the last two
years:
Chen EY, Sun A, Chen CS, Mintz AJ, Chin WC.
Am J Physiol Lung Cell Mol Physiol. 2014 May 16. pii: ajplung.00396.2012. [Epub ahead of print]
Rehan VK, Liu J, Sakurai R, Torday JS.
Am J Physiol Lung Cell Mol Physiol. 2013 Oct 1;305(7):L501-7. doi: 10.1152/ajplung.00078.2013.
Epub 2013 Aug 2.
PMID:23911437
Takemura Y, Helms MN, Eaton AF, Self J, Ramosevac
S, Jain L, Bao HF, Eaton DC.
Am J Physiol Lung Cell Mol Physiol. 2013 Mar 15;304(6):L428-37. doi:
10.1152/ajplung.00129.2012. Epub 2013 Jan 4.
PMID:23292809
Zou W, Zou Y, Zhao Z, Li B, Ran P.
Am J Physiol Lung Cell Mol Physiol. 2013 Feb 15;304(4):L199-209. doi: 10.1152/ajplung.00094.2012.
Epub 2012 Nov 30.
PMID:23204070
Fu XW, Rekow SS, Spindel ER.
Am J Physiol Lung Cell Mol Physiol. 2012 Oct 15;303(8):L661-8. doi:
10.1152/ajplung.00075.2012. Epub 2012 Aug 24.
PMID: 22923641