1
|
Liao WZ, Li JX, Feng WY, Xiao JQ, Wang ZX, Xie SJ, Hu YM, Mao JH, Huang ZM, Guo XG, Guan WJ. Association between coffee and caffeine intake and risk of COPD: Findings based on NHANES 2007-2012. Heart Lung 2024; 67:53-61. [PMID: 38701700 DOI: 10.1016/j.hrtlng.2024.04.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 05/05/2024]
Abstract
BACKGROUND The association between coffee and caffeine intake and the risk of COPD and lung function has not been thoroughly discussed in Americans, with subgroup and threshold effects remaining unclear. OBJECTIVES This study investigated the association between coffee and caffeine consumption and the risk of chronic obstructive pulmonary disease (COPD) as well as lung function utilizing data from the NHANES 2007-2012. METHODS We assessed the associations of coffee and caffeine consumption with the risk of COPD and lung function parameters, including FEV1 and FVC, adjusting for common demographic and disease characteristics in a cross-sectional analysis of NHANES data. RESULTS A total of 9763 participants were included in the study, and 592 were diagnosed with COPD. Multivariate regression models revealed positive associations between coffee and caffeine consumption and the risk of COPD and lung function. Subgroup analyses stratified by sex, DM, hypertension status, and smoking habits identified potential effect modifiers as well as inflection points from threshold effect examinations. CONCLUSIONS The results of this cross-sectional study indicated significant positive correlations between coffee and caffeine consumption and the risk of COPD. Additionally, positive correlations between exposure variables and FEV1 and FVC were detected. Among the stratification factors, smoking status exhibited the most potential for modifying effects. Future practices and research are needed to validate the results and explore the underlying mechanisms.
Collapse
Affiliation(s)
- Wan-Zhe Liao
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China.
| | - Jia-Xin Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Wei-Yi Feng
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Jia-Qi Xiao
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Zi-Xun Wang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China
| | - Shuo-Jia Xie
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China
| | - Yi-Ming Hu
- Department of Electronic Information Engineering, Glasgow College, University of Electronic Science and Technology, Chengdu, 611731, China
| | - Jun-Hao Mao
- Department of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China
| | - Ze-Min Huang
- Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, 511436, China
| | - Xu-Guang Guo
- Department of Clinical Laboratory Medicine, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Department of Clinical Medicine, The Third Clinical School of Guangzhou Medical University, Guangzhou, 511436, China; Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, King Med School of Laboratory Medicine, Guangzhou Medical University, Guangzhou, 510000, China
| | - Wei-Jie Guan
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, China.
| |
Collapse
|
2
|
Cho SH, Doo M, Kim JC, Ha JH. Respiratory Safety Pharmacological Testing with Single Intravenous Administration of Caffeine in Sprague-Dawley Rats. J Med Food 2024; 27:275-278. [PMID: 38377552 DOI: 10.1089/jmf.2023.k.0264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024] Open
Abstract
As caffeine consumption continues to increase, both positive and negative effects are becoming evident. Caffeine directly affects the cardiovascular system, including heart function and rate. Thus, understanding the current respiratory safety pharmacological responses is of utmost importance. To elucidate the respiratory safety pharmacological characteristics of caffeine, male Sprague-Dawley rats, aged 6 weeks, were intravenously administered doses of 0, 2, 6, and 20 mg/kg of caffeine. Respiratory rate, tidal volume, and minute volume were subsequently measured. In this study, we observed a significant increase in respiratory rate and minute volume, but a remarkable reduction in tidal volume following the intravenous administration of caffeine at doses exceeding 6 mg/kg. These changes were evident within the timeframe of 0.25 to 1.5 h. The data we have collected can serve as valuable foundational scientific information for future research on caffeine, encompassing absorption, distribution, metabolism, excretion, and pharmacological core-battery experiments.
Collapse
Affiliation(s)
- Sung-Hyun Cho
- College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
- Safety Evaluation Team, CentralBio Co., Ltd., Incheon, Korea
| | - Miae Doo
- Department of Food and Nutrition, Kunsan National University, Gunsan, Korea
| | - Jong-Choon Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Jung-Heun Ha
- Department of Food Science and Nutrition, Dankook University, Cheonan, Korea
- Research Center for Industrialization of Natural Neutralization, Dankook University, Yongin, Korea
| |
Collapse
|
3
|
Lin F, Zhu Y, Liang H, Li D, Jing D, Liu H, Pan P, Zhang Y. Association of Coffee and Tea Consumption with the Risk of Asthma: A Prospective Cohort Study from the UK Biobank. Nutrients 2022; 14:nu14194039. [PMID: 36235690 PMCID: PMC9572944 DOI: 10.3390/nu14194039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 09/26/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022] Open
Abstract
Background: Previous observational studies investigated the relationship between coffee and tea intake and the risk of asthma, however, the conclusions were inconsistent. Further, the combined effect of coffee and tea consumption on asthma has rarely been studied. Methods: We examined associations between the self-reported intake of tea and coffee and the risk of incident asthma in a total of 424,725 participants aged from 39 to 73 years old from the UK Biobank. Cox proportional hazards models were used to estimate the associations between coffee/tea consumption and incident adult-onset asthma, adjusting for age, sex, race, smoking status, body mass index (BMI), education, and Townsend deprivation index. Results: Cox models with penalized splines showed J-shaped associations of coffee, tea, caffeinated coffee, and caffeine intake from coffee and tea with the risk of adult-onset asthma (p for nonlinear <0.01). Coffee intake of 2 to 3 cups/d (hazard ratio [HR] 0.877, 95% confidence interval [CI] 0.826−0.931) or tea intake of 0.5 to 1 cups/d (HR 0.889, 95% CI 0.816−0.968) or caffeinated coffee intake of 2 to 3 cups/d (HR 0.858, 95% CI 0.806−0.915) or combination caffeine intake from tea and coffee of 160.0 to 235.0 mg per day (HR 0.899, 95% CI 0.842−0.961) were linked with the lowest hazard ratio of incident asthma after adjustment for age, sex, race, smoking status, BMI, qualification, and Townsend deprivation index. Conclusions: Collectively, the study showed light-to-moderate coffee and tea consumption was associated with a reduced risk of adult-onset asthma and controlling total caffeine intake from coffee and tea for a moderate caffeine dose of 160.0 to 305.0 mg/day may be protective against adult-onset asthma. Further investigation on the possible preventive role of caffeine in asthma is warranted.
Collapse
Affiliation(s)
- Fengyu Lin
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
- National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha 410008, China
| | - Yiqun Zhu
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
- National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha 410008, China
| | - Huaying Liang
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
- National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha 410008, China
| | - Dianwu Li
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
- National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha 410008, China
| | - Danrong Jing
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Hong Liu
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
- Correspondence: (H.L.); (P.P.); (Y.Z.)
| | - Pinhua Pan
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
- National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
- Correspondence: (H.L.); (P.P.); (Y.Z.)
| | - Yan Zhang
- Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha 410008, China
- National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
- Correspondence: (H.L.); (P.P.); (Y.Z.)
| |
Collapse
|
4
|
Antidiarrheal Effect of 80% Methanol Extract and Fractions of the Roasted Seed of Coffea arabica Linn (Rubiaceae) in Swiss Albino Mice. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:9914936. [PMID: 35096121 PMCID: PMC8791727 DOI: 10.1155/2022/9914936] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/01/2021] [Accepted: 01/07/2022] [Indexed: 12/17/2022]
Abstract
BACKGROUND Globally in 2019, diarrhea was the second leading cause of mortality in children, accounting for more than half a million under-five deaths yearly. Several societies use Coffea arabica Linn for the treatment of diarrhea. However, its use is not scientifically validated. OBJECTIVE The study was conducted to evaluate antidiarrheal activity of 80% methanol extract and solvent fractions of roasted seed of Coffea arabica Linn in mice. METHODS Coffea arabica Linn seed was roasted, milled, extracted, and fractionated using hexane, ethyl acetate, and distilled water. Castor oil-induced diarrhea, enteropooling, and motility tests were conducted. Effects on onset, number of feces, weight of feces, fluid content, volume and weight of intestinal content, and motility were evaluated by administering 100 mg/kg, 200 mg/kg, and 400 mg/kg of each extract. Negative controls received 10 ml/kg of the vehicle, and positive controls received either loperamide (3 mg/kg) or atropine (1 mg/kg). Data were analyzed using one-way ANOVA followed by Tukey's post hoc test. RESULTS Ethyl acetate fraction at all tested doses significantly prolonged (p < 0.05) onset of diarrhea. The number and weight of feces were also reduced significantly by crude extract and ethyl acetate fraction. Reduction in fluid content was observed at 200 mg/kg and 400 mg/kg of the crude extract (p < 0.01) and aqueous fraction (p < 0.001) as well as all tested doses of ethyl acetate fraction (p < 0.001). Similarly, the crude extract, ethyl acetate fraction, and aqueous fraction showed a significant reduction in the volume and weight of intestinal content. At 400 mg/kg, the crude extract, hexane fraction, aqueous fraction, and all doses of ethyl acetate fraction showed significant antimotility activity. CONCLUSION The results of this study revealed that the roasted seed of Coffea arabica Linn has antidiarrheal activity.
Collapse
|
5
|
Sajjadi E, Seven YB, Ehrbar JG, Wymer JP, Mitchell GS, Smith BK. Acute intermittent hypoxia and respiratory muscle recruitment in people with amyotrophic lateral sclerosis: A preliminary study. Exp Neurol 2022; 347:113890. [PMID: 34624328 PMCID: PMC9488543 DOI: 10.1016/j.expneurol.2021.113890] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 09/28/2021] [Accepted: 10/03/2021] [Indexed: 01/03/2023]
Abstract
Respiratory failure is the main cause of death in amyotrophic lateral sclerosis (ALS). Since no effective treatments to preserve independent breathing are available, there is a critical need for new therapies to preserve or restore breathing ability. Since acute intermittent hypoxia (AIH) elicits spinal respiratory motor plasticity in rodent ALS models, and may restore breathing ability in people with ALS, we performed a proof-of-principle study to investigate this possibility in ALS patients. Quiet breathing, sniff nasal inspiratory pressure (SNIP) and maximal inspiratory pressure (MIP) were tested in 13 persons with ALS and 10 age-matched controls, before and 60 min post-AIH (15, 1 min episodes of 10% O2, 2 min normoxic intervals) or sham AIH (continuous normoxia). The root mean square (RMS) of the right and left diaphragm, 2nd parasternal, scalene and sternocleidomastoid muscles were monitored. A vector analysis was used to calculate summated vector magnitude (Mag) and similarity index (SI) of collective EMG activity during quiet breathing, SNIP and MIP maneuvers. AIH facilitated tidal volume and minute ventilation (treatment main effects: p < 0.05), and Mag (ie. collective respiratory muscle activity; p < 0.001) during quiet breathing in ALS and control subjects, but there was no effect on SI during quiet breathing. SNIP SI decreased in both groups post-AIH (p < 0.005), whereas Mag was unchanged (p = 0.09). No differences were observed in SNIP or MIP post AIH in either group. Discomfort was not reported during AIH by any subject, nor were adverse events observed. Thus, AIH may be a safe way to increase collective inspiratory muscle activity during quiet breathing in ALS patients, although a single AIH presentation was not sufficient to significantly increase peak inspiratory pressure generation. These preliminary results provide evidence that AIH may improve breathing function in people with ALS, and that future studies of prolonged, repetitive AIH protocols are warranted.
Collapse
Affiliation(s)
- Elaheh Sajjadi
- Breathing Research and Therapeutics Center, University of Florida, Gainesville, FL, USA, 32610,McKnight Brain Institute, University of Florida, Gainesville, FL, USA, 32610,Department of Physical Therapy, University of Florida, Gainesville, FL, USA, 32610
| | - Yasin B. Seven
- Breathing Research and Therapeutics Center, University of Florida, Gainesville, FL, USA, 32610,McKnight Brain Institute, University of Florida, Gainesville, FL, USA, 32610,Department of Physical Therapy, University of Florida, Gainesville, FL, USA, 32610
| | - Jessica G Ehrbar
- Department of Physical Therapy, University of Florida, Gainesville, FL, USA, 32610
| | - James P. Wymer
- Breathing Research and Therapeutics Center, University of Florida, Gainesville, FL, USA, 32610,McKnight Brain Institute, University of Florida, Gainesville, FL, USA, 32610,Neurology, University of Florida, Gainesville, FL, USA, 32610
| | - Gordon S. Mitchell
- Breathing Research and Therapeutics Center, University of Florida, Gainesville, FL, USA, 32610,McKnight Brain Institute, University of Florida, Gainesville, FL, USA, 32610,Department of Physical Therapy, University of Florida, Gainesville, FL, USA, 32610
| | - Barbara K. Smith
- Breathing Research and Therapeutics Center, University of Florida, Gainesville, FL, USA, 32610,Department of Physical Therapy, University of Florida, Gainesville, FL, USA, 32610,Pediatrics, University of Florida, Gainesville, FL, USA, 32610
| |
Collapse
|
6
|
Association between Caffeine Intake and All-Cause and Cause-Specific Mortality: An Analysis of the National Health and Nutrition Examination Survey (NHANES) 1999-2014 Database. NURSING REPORTS 2021; 11:901-912. [PMID: 34968277 PMCID: PMC8715461 DOI: 10.3390/nursrep11040083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/06/2021] [Accepted: 11/08/2021] [Indexed: 11/30/2022] Open
Abstract
Sixty-four percent of adults in America drink coffee daily, and caffeine is the main reason people tend to drink coffee habitually. Few studies have examined the association between caffeine and all-cause and cause-specific mortality. The objective of this study was to examine the association between caffeine and all-cause and cause-specific mortality using the National Health and Nutrition Examination Survey (NHANES) 1999–2014 database. The multivariate Cox proportional hazards regression model was used to examine 23,878 individuals 20 years and older. Daily caffeine intake was measured once at baseline. A total of 2206 deaths occurred, including 394 cardiovascular (CVD) deaths and 525 cancer deaths. Compared to those with a caffeine intake of <100 mg/day, the hazard ratios (HRs) for CVD mortality were significantly lower in the participants with a caffeine intake of 100–200 mg/day (HR, 0.63; 95% confidence interval [CI], 0.45–0.88), and those with a caffeine intake of >200 mg/day (HR, 0.67; 95% CI, 0.50–0.88) after adjusting for potential confounders. The HRs for all-cause mortality were significantly lower in the participants with a caffeine intake of 100–200 mg/day (HR, 0.78; 95% CI, 0.67–0.91), and those with a caffeine intake of >200 mg/day (HR, 0.68; 95% CI, 0.60–0.78). Subgroup analyses showed that caffeine may have different effects on all-cause mortality among different age and body mass index (BMI) groups. In conclusion, higher caffeine intake was associated with lower all-cause and CVD mortality.
Collapse
|
7
|
Han YY, Forno E, C Celedón J. Urinary caffeine and caffeine metabolites, asthma, and lung function in a nationwide study of U.S. adults. J Asthma 2021; 59:2127-2134. [PMID: 34644210 DOI: 10.1080/02770903.2021.1993250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Coffee intake has been inversely associated with asthma in adults. We examined the relation between urinary levels of caffeine or caffeine metabolites and asthma, lung function, and fractional exhaled nitric oxide (FeNO) in adults. METHODS Cross-sectional study of 2,832 adults aged 18-79 years in the US National Health and Nutrition Examination Survey (NHANES). Multivariable logistic or linear regression was used for the analysis of urinary levels of caffeine or each of its three major metabolites (paraxanthine, theobromine, and theophylline) and current asthma, lung function, and FeNO. RESULTS Subjects with urinary paraxanthine levels in the fourth quartile (Q4) had 53% lower odds of current asthma than those whose urinary paraxanthine levels were in the first quartile (Q1; 95% confidence = 0.22 to 1.00). Among never and former smokers, subjects with urinary theophylline levels above Q1 had 49% lower odds of current asthma than those whose urinary theophylline level was in Q1 (95% CI = 0.31 to 0.85). Among subjects without current asthma, each log10-unit increment in paraxanthine level was associated with a 0.83% increment in percent predicted (%pred) FEV1 and a 1.27% increment in %pred FVC, while each log10-unit in theophylline was associated with a 1.24% increment in %pred FVC. Neither urinary caffeine nor any urinary caffeine metabolite was associated with bronchodilator response or FeNO. CONCLUSIONS Our findings suggest that two caffeine metabolites (theophylline and paraxanthine) may contribute to the previously reported inverse association between coffee intake and asthma in adults.
Collapse
Affiliation(s)
- Yueh-Ying Han
- Division of Pediatric Pulmonary Medicine, UPMC Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA, USA
| | | | | |
Collapse
|
8
|
Martens K, Steelant B, Bullens DMA. Taste Receptors: The Gatekeepers of the Airway Epithelium. Cells 2021; 10:cells10112889. [PMID: 34831117 PMCID: PMC8616034 DOI: 10.3390/cells10112889] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/17/2021] [Accepted: 10/22/2021] [Indexed: 02/07/2023] Open
Abstract
Taste receptors are well known for their role in the sensation of taste. Surprisingly, the expression and involvement of taste receptors in chemosensory processes outside the tongue have been recently identified in many organs including the airways. Currently, a clear understanding of the airway-specific function of these receptors and the endogenous activating/inhibitory ligands is lagging. The focus of this review is on recent physiological and clinical data describing the taste receptors in the airways and their activation by secreted bacterial compounds. Taste receptors in the airways are potentially involved in three different immune pathways (i.e., the production of nitric oxide and antimicrobial peptides secretion, modulation of ciliary beat frequency, and bronchial smooth muscle cell relaxation). Moreover, genetic polymorphisms in these receptors may alter the patients’ susceptibility to certain types of respiratory infections as well as to differential outcomes in patients with chronic inflammatory airway diseases such as chronic rhinosinusitis and asthma. A better understanding of the function of taste receptors in the airways may lead to the development of a novel class of therapeutic molecules that can stimulate airway mucosal immune responses and could treat patients with chronic airway diseases.
Collapse
Affiliation(s)
- Katleen Martens
- Allergy and Clinical Immunology Research Group, Department of Microbiology, Immunology and Transplantation, KU Leuven, 3000 Leuven, Belgium; (K.M.); (B.S.)
- Department of Bioscience Engineering, University of Antwerp, 2020 Antwerp, Belgium
| | - Brecht Steelant
- Allergy and Clinical Immunology Research Group, Department of Microbiology, Immunology and Transplantation, KU Leuven, 3000 Leuven, Belgium; (K.M.); (B.S.)
| | - Dominique M. A. Bullens
- Allergy and Clinical Immunology Research Group, Department of Microbiology, Immunology and Transplantation, KU Leuven, 3000 Leuven, Belgium; (K.M.); (B.S.)
- Clinical Division of Pediatrics, University Hospitals Leuven, 3000 Leuven, Belgium
- Correspondence:
| |
Collapse
|
9
|
Dickinson J, Amirav I, Hostrup M. Nonpharmacologic Strategies to Manage Exercise-Induced Bronchoconstriction. Immunol Allergy Clin North Am 2019; 38:245-258. [PMID: 29631733 DOI: 10.1016/j.iac.2018.01.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Pharmacologic management of exercise-induced bronchoconstriction (EIB) is the mainstay of preventative therapy. There are some nonpharmacologic interventions, however, that may assist the management of EIB. This review discusses these nonpharmacologic interventions and how they may be applied to patients and athletes with EIB.
Collapse
Affiliation(s)
- John Dickinson
- School of Sport and Exercise Sciences, University of Kent, UK
| | - Israel Amirav
- Department of Paediatrics, University of Alberta, Edmonton, Canada
| | - Morten Hostrup
- Department of Nutrition, Exercise and Sports, University of Copenhagen, August Krogh 2nd Floor, Universitetsparken 13, Copenhagen DK-2100, Denmark; Department of Respiratory Medicine, Bispebjerg University Hospital, Copenhagen, Denmark.
| |
Collapse
|
10
|
Tsujimoto T, Kajio H, Sugiyama T. Association Between Caffeine Intake and All-Cause and Cause-Specific Mortality: A Population-Based Prospective Cohort Study. Mayo Clin Proc 2017; 92:1190-1202. [PMID: 28697850 DOI: 10.1016/j.mayocp.2017.03.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 02/17/2017] [Accepted: 03/07/2017] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To assess whether caffeine intake is associated with all-cause and cause-specific mortality. PATIENTS AND METHODS We conducted a prospective cohort study using data from the National Health and Nutrition Examination Survey 1999-2010. Cox proportional hazards models were used to compare the multivariate-adjusted hazard ratios (HRs) of participants with a caffeine intake of 10 to 99, 100 to 199, and 200 mg/d or more with those of participants with a caffeine intake of less than 10 mg/d. RESULTS In total, 17,594 participants were included, and the mean ± SD and median (interquartile range) follow-up was 6.5±2.8 years and 6.4 (3.6-9.5) years, respectively; 17,568 participants (99.8%) completed the follow-up, and 1310 died. Compared with those who had a caffeine intake of less than 10 mg/d, HRs and 95% CIs for all-cause mortality were significantly lower in participants with a caffeine intake of 10 to 99 mg/d (HR, 0.81; 95% CI, 0.66-1.00; P=.05), 100 to 199 mg/d (HR, 0.63; 95% CI, 0.51-0.78; P<.001), and 200 or more mg/d (HR, 0.69; 95% CI, 0.58-0.83; P<.001). A similar association was observed in participants who consumed less than 1 cup of coffee per week, and the HR was lowest in those with a caffeine intake of 100 to 199 mg/d (HR, 0.46; 95% CI, 0.22-0.93). There was no association between caffeine intake and cardiovascular mortality, whereas the HRs for noncardiovascular mortality were significantly lower in those with a caffeine intake of 10 to 99 mg/d (HR, 0.74; 95% CI, 0.57-0.95; P=.01), 100 to 199 mg/d (HR, 0.60; 95% CI, 0.46-0.77; P<.001), and 200 or more mg/d (HR, 0.65; 95% CI, 0.53-0.80; P<.001). CONCLUSION Moderate caffeine intake was associated with a decreased risk of all-cause mortality, regardless of the presence or absence of coffee consumption.
Collapse
Affiliation(s)
- Tetsuro Tsujimoto
- Department of Diabetes, Endocrinology, and Metabolism, Center Hospital, National Center for Global Health and Medicine, Tokyo, Japan.
| | - Hiroshi Kajio
- Department of Diabetes, Endocrinology, and Metabolism, Center Hospital, National Center for Global Health and Medicine, Tokyo, Japan
| | - Takehiro Sugiyama
- Department of Clinical Study and Informatics, Center for Clinical Sciences, National Center for Global Health and Medicine, Tokyo, Japan; Department of Public Health/Health Policy, the University of Tokyo, Tokyo, Japan
| |
Collapse
|
11
|
de Boer A, van de Worp WRPH, Hageman GJ, Bast A. The effect of dietary components on inflammatory lung diseases - a literature review. Int J Food Sci Nutr 2017; 68:771-787. [PMID: 28276906 DOI: 10.1080/09637486.2017.1288199] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Anti-inflammatory treatment in chronic inflammatory lung diseases usually involves glucocorticosteroids. With patients suffering from serious side effects or becoming resistant, specific nutrients, that are suggested to positively influence disease progression, can be considered as new treatment options. The dietary inflammatory index is used to calculate effects of dietary components on inflammation and lung function to identify most potent dietary components, based on 162 articles. The positive effects of n-3 PUFAs and vitamin E on lung function can at least partially be explained by their anti-inflammatory effect. Many other dietary components showed only small or no effects on inflammation and/or lung function, although the number of weighted studies was often too small for a reliable assessment. Optimal beneficial dietary elements might reduce the required amounts of anti-inflammatory treatments, thereby decreasing both side effects and development of resistance as to improve quality of life of patients suffering from chronic inflammatory lung diseases.
Collapse
Affiliation(s)
- Alie de Boer
- a Faculty of Humanities and Sciences , Food Claims Centre Venlo, Maastricht University Campus Venlo, Maastricht University , Venlo , The Netherlands
| | - Wouter R P H van de Worp
- b Department of Pharmacology and Toxicology, Faculty of Health Medicine and Life Sciences , Maastricht University , Maastricht , The Netherlands
| | - Geja J Hageman
- b Department of Pharmacology and Toxicology, Faculty of Health Medicine and Life Sciences , Maastricht University , Maastricht , The Netherlands
| | - Aalt Bast
- b Department of Pharmacology and Toxicology, Faculty of Health Medicine and Life Sciences , Maastricht University , Maastricht , The Netherlands.,c Faculty of Humanities and Sciences , Maastricht University Campus Venlo, Maastricht University , Venlo , The Netherlands
| |
Collapse
|
12
|
Abstract
PURPOSE OF REVIEW Although today's cornerstone therapies for asthma (inhaled bronchodilators and corticosteroids) target airway narrowing and lung inflammation, about half of treated asthmatic patients do not achieve good disease control. There is a clear need for new therapeutic approaches and novel drug targets. Recent research has unexpectedly revealed that certain taste receptors (particularly those involved in bitter taste transduction) are expressed in lung tissue. RECENT FINDINGS Bitter taste receptors are expressed in several cell types in the lungs (such as chemosensory cells, epithelial cells, smooth muscle cells, lymphocytes, and macrophages) and variously involved in ciliary beating, muscle relaxation, and/or inhibition of the production of inflammatory mediators. Here, we review recent research on the role of bitter taste receptors in experimental models of asthma and in asthmatics. SUMMARY The currently available data suggest that bitter taste receptor agonists have therapeutic potential in chronic obstructive airway diseases such as asthma.
Collapse
|
13
|
Grassin-Delyle S, Abrial C, Brollo M, Naline E, Devillier P. [Taste receptors in the lungs: interesting or anecdotal?]. REVUE DE PNEUMOLOGIE CLINIQUE 2014; 70:148-155. [PMID: 24646786 DOI: 10.1016/j.pneumo.2013.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 11/08/2013] [Accepted: 11/12/2013] [Indexed: 06/03/2023]
Abstract
The receptors responsible for taste perception distinguish the four basic tastes : salty, sweet, bitter and umami. Among them, the bitter taste receptors (TAS2R) are G protein coupled receptors, including 25 subtypes identified in humans to date. Although the existence of endogenous agonists remains uncertain, the TAS2R receptors have the ability to recognize natural or synthetic molecules, as various molecules produced by bacteria, or caffeine, chloroquine, or erythromycin. The expression of these receptors, initially thought to be confined to the oral cavity, has recently been described in extra-oral tissues such as the gastrointestinal tract and the lungs. The effects in the lung tissue are essentially at three levels : TAS2R receptors expressed on the cilia of epithelial cells increase the cilia vibration frequency; the stimulation of TAS2R receptors expressed in bronchial smooth muscle cells leads to bronchial relaxation; while TAS2R receptors expressed on immune cells in the lung tissue, including macrophages, are involved in the modulation of the production of pro-inflammatory cytokines. In conclusion, in view of these complementary mechanisms, TAS2R receptors may become a pharmacological target of interest for the treatment of obstructive lung diseases.
Collapse
Affiliation(s)
- S Grassin-Delyle
- Laboratoire de pharmacologie respiratoire UPRES EA220, hôpital Foch, 11, rue Guillaume-Lenoir, 92150 Suresnes, France.
| | - C Abrial
- Laboratoire de pharmacologie respiratoire UPRES EA220, hôpital Foch, 11, rue Guillaume-Lenoir, 92150 Suresnes, France
| | - M Brollo
- Laboratoire de pharmacologie respiratoire UPRES EA220, hôpital Foch, 11, rue Guillaume-Lenoir, 92150 Suresnes, France
| | - E Naline
- Laboratoire de pharmacologie respiratoire UPRES EA220, hôpital Foch, 11, rue Guillaume-Lenoir, 92150 Suresnes, France; Université Versailles Saint-Quentin, UFR sciences de la santé Simone-Veil, 2, avenue de la Source-de-la-Bièvre, 78180 Montigny-Le-Bretonneux, France
| | - P Devillier
- Laboratoire de pharmacologie respiratoire UPRES EA220, hôpital Foch, 11, rue Guillaume-Lenoir, 92150 Suresnes, France; Université Versailles Saint-Quentin, UFR sciences de la santé Simone-Veil, 2, avenue de la Source-de-la-Bièvre, 78180 Montigny-Le-Bretonneux, France
| |
Collapse
|
14
|
O'Keefe JH, Bhatti SK, Patil HR, DiNicolantonio JJ, Lucan SC, Lavie CJ. Effects of habitual coffee consumption on cardiometabolic disease, cardiovascular health, and all-cause mortality. J Am Coll Cardiol 2013; 62:1043-1051. [PMID: 23871889 DOI: 10.1016/j.jacc.2013.06.035] [Citation(s) in RCA: 201] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/09/2013] [Accepted: 06/18/2013] [Indexed: 12/30/2022]
Abstract
Coffee, after water, is the most widely consumed beverage in the United States, and is the principal source of caffeine intake among adults. The biological effects of coffee may be substantial and are not limited to the actions of caffeine. Coffee is a complex beverage containing hundreds of biologically active compounds, and the health effects of chronic coffee intake are wide ranging. From a cardiovascular (CV) standpoint, coffee consumption may reduce the risk of type 2 diabetes mellitus and hypertension, as well as other conditions associated with CV risk such as obesity and depression; but it may adversely affect lipid profiles depending on how the beverage is prepared. Regardless, a growing body of data suggests that habitual coffee consumption is neutral to beneficial regarding the risks of a variety of adverse CV outcomes including coronary heart disease, congestive heart failure, arrhythmias, and stroke. Moreover, large epidemiological studies suggest that regular coffee drinkers have reduced risks of mortality, both CV and all-cause. The potential benefits also include protection against neurodegenerative diseases, improved asthma control, and lower risk of select gastrointestinal diseases. A daily intake of ∼2 to 3 cups of coffee appears to be safe and is associated with neutral to beneficial effects for most of the studied health outcomes. However, most of the data on coffee's health effects are based on observational data, with very few randomized, controlled studies, and association does not prove causation. Additionally, the possible advantages of regular coffee consumption have to be weighed against potential risks (which are mostly related to its high caffeine content) including anxiety, insomnia, tremulousness, and palpitations, as well as bone loss and possibly increased risk of fractures.
Collapse
Affiliation(s)
- James H O'Keefe
- Mid America Heart Institute at Saint Luke's Hospital of Kansas City and University of Missouri-Kansas City, Kansas City, Missouri.
| | - Salman K Bhatti
- Mid America Heart Institute at Saint Luke's Hospital of Kansas City and University of Missouri-Kansas City, Kansas City, Missouri
| | - Harshal R Patil
- Mid America Heart Institute at Saint Luke's Hospital of Kansas City and University of Missouri-Kansas City, Kansas City, Missouri
| | - James J DiNicolantonio
- Mid America Heart Institute at Saint Luke's Hospital of Kansas City and University of Missouri-Kansas City, Kansas City, Missouri
| | - Sean C Lucan
- Department of Family and Social Medicine, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, New York
| | - Carl J Lavie
- John Ochsner Heart and Vascular Institute, Ochsner Clinical School, The University of Queensland School of Medicine, New Orleans, Louisiana
| |
Collapse
|
15
|
George M. Health beliefs, treatment preferences and complementary and alternative medicine for asthma, smoking and lung cancer self-management in diverse Black communities. PATIENT EDUCATION AND COUNSELING 2012; 89:489-500. [PMID: 22683293 PMCID: PMC3463761 DOI: 10.1016/j.pec.2012.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 05/01/2012] [Accepted: 05/05/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVE The purpose of this literature review is to characterize unconventional health beliefs and complementary and alternative medicine (CAM) for asthma, smoking and lung cancer as those that are likely safe and those that likely increase risk in diverse Black communities. These findings should provide the impetus for enhanced patient-provider communication that elicits patients' beliefs and self-management preferences so that they may be accommodated, or when necessary, reconciled through discussion and partnership. METHODS Original research articles relevant to this topic were obtained by conducting a literature search of the PubMed Plus, PsychINFO and SCOPUS databases using combinations of the following search terms: asthma, lung cancer, emphysema, chronic obstructive pulmonary disease (COPD), smoking, beliefs, complementary medicine, alternative medicine, complementary and alternative medicine (CAM), explanatory models, African American, and Black. RESULTS Using predetermined inclusion and exclusion criteria, 51 original research papers were retained. Taken together, they provide evidence that patients hold unconventional beliefs about the origins of asthma and lung cancer and the health risks of smoking, have negative opinions of standard medical and surgical treatments, and have favorable attitudes about using CAM. All but a small number of CAM and health behaviors were considered safe. CONCLUSION When patients' unconventional beliefs and preferences are not identified and discussed, there is an increased risk that standard approaches to self-management of lung disease will be sub-optimal, that potentially dangerous CAM practices might be used and that timely medical interventions may be delayed. PRACTICE IMPLICATIONS Providers need effective communication skills as the medical dialog forms the basis of patients' understanding of disease and self-management options. The preferred endpoint of such discussions should be agreement around an integrated treatment plan that is effective, safe and acceptable to both.
Collapse
Affiliation(s)
- Maureen George
- Department of Family and Community Health, University of Pennsylvania School of Nursing, Philadelphia, PA 19104-4217, USA.
| |
Collapse
|
16
|
Abstract
BACKGROUND Caffeine has a variety of pharmacological effects; it is a weak bronchodilator and it also reduces respiratory muscle fatigue. It is chemically related to the drug theophylline which is used to treat asthma. It has been suggested that caffeine may reduce asthma symptoms and interest has been expressed in its potential role as an asthma treatment. A number of studies have explored the effects of caffeine in asthma, this is the first review to systematically examine and summarise the evidence. OBJECTIVES To assess the effects of caffeine on lung function and identify whether there is a need to control for caffeine consumption prior to either lung function or exhaled nitric oxide testing. SEARCH STRATEGY We searched the Cochrane Airways Group trials register and the reference lists of articles (August 2009). We also contacted study authors. SELECTION CRITERIA Randomised clinical trials of oral caffeine compared to placebo or coffee compared to decaffeinated coffee in adults with asthma. DATA COLLECTION AND ANALYSIS Trial selection, quality assessment and data extraction were done independently by two reviewers. MAIN RESULTS Seven trials involving a total of 75 people with mild to moderate asthma were included. The studies were all of cross-over design .Six trials involving 55 people showed that in comparison with placebo, caffeine, even at a 'low dose' (< 5mg/kg body weight), appears to improve lung function for up to two hours after consumption. Forced expiratory volume in one minute showed a small improvement up to two hours after caffeine ingestion (SMD 0.72; 95% CI 0.25 to 1.20), which translates into a 5% mean difference in FEV1. However in two studies the mean differences in FEV1 were 12% and 18% after caffeine. Mid-expiratory flow rates also showed a small improvement with caffeine and this was sustained up to four hours.One trial involving 20 people examined the effect of drinking coffee versus a decaffeinated variety on the exhaled nitric oxide levels in patients with asthma and concluded that there was no significant effect on this outcome. AUTHORS' CONCLUSIONS Caffeine appears to improve airways function modestly, for up to four hours, in people with asthma . People may need to avoid caffeine for at least four hours prior to lung function testing, as caffeine ingestion could cause misinterpretation of the results. Drinking caffeinated coffee before taking exhaled nitric oxide measurements does not appear to affect the results of the test, but more studies are needed to confirm this.
Collapse
Affiliation(s)
- Emma J Welsh
- St George's, University of LondonPopulation Health Sciences and EducationCranmer TerraceLondonUKSW17 0RE
| | - Anna Bara
- Clinical Trials UnitMedical Research UnitOther Diseases Group222 Euston RoadLondonUKNW1 2DA
| | - Elizabeth Barley
- King's College LondonFlorence Nightingale School of Nursing and Midwifery2.25, James Clerk Maxwell Building57 Waterloo RoadLondonUKSE1 8WA
| | - Christopher J Cates
- St George's, University of LondonPopulation Health Sciences and EducationCranmer TerraceLondonUKSW17 0RE
| | | |
Collapse
|
17
|
Leaker BR, O'Connor B, Hansel TT, Barnes PJ, Meng L, Mathur VS, Lieu HD. Safety of regadenoson, an adenosine A2A receptor agonist for myocardial perfusion imaging, in mild asthma and moderate asthma patients: a randomized, double-blind, placebo-controlled trial. J Nucl Cardiol 2008; 15:329-36. [PMID: 18513639 DOI: 10.1016/j.nuclcard.2008.02.009] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2007] [Accepted: 12/28/2007] [Indexed: 11/30/2022]
Abstract
BACKGROUND Patients with reactive airways are at risk for adenosine-induced bronchoconstriction, mediated via A(2B) and/or A(3) adenosine receptors. METHODS AND RESULTS To examine the effects of regadenoson, a selective adenosine A(2A) receptor agonist, on airway resistance, we conducted a randomized, double-blind, placebo-controlled crossover trial in asthmatic patients with a positive adenosine monophosphate challenge test. The mean ratio of the forced expiratory volume in 1 second (FEV(1)) at each tested time point relative to the baseline FEV(1) was significantly higher after treatment with regadenoson compared with placebo from 10 to 60 minutes after treatment. One patient had a substantial but asymptomatic FEV(1) reduction (-36.2%) after regadenoson that reversed spontaneously. The most common adverse events with regadenoson were tachycardia (66%), dizziness (53%), headache (45%), and dyspnea (34%). The mean heart rate significantly increased with regadenoson (maximum of +10.4 beats/min) versus placebo. CONCLUSIONS In this pilot safety study of 48 patients with mild or moderate asthma who had bronchial reactivity to adenosine monophosphate, regadenoson was safe and well tolerated.
Collapse
|
18
|
Jegatheesan P, Keller RL, Hawgood S. Early variable-flow nasal continuous positive airway pressure in infants < or =1000 grams at birth. J Perinatol 2006; 26:189-96. [PMID: 16453007 DOI: 10.1038/sj.jp.7211454] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To compare the incidence of chronic lung disease (CLD) in extremely low birth weight (ELBW, < or =1000 g) infants before and after the introduction of early, preferential application of nasal continuous airway pressure (NCPAP) utilizing a variable flow delivery system. STUDY DESIGN A retrospective cohort study of ELBW infants 2 years prior to (Pre-early NCPAP, n=96) and 2 years following (Early NCPAP, n=75) the initiation of an early NCPAP policy. RESULTS There were no significant changes (Pre-early NCPAP vs Early NCPAP) in the incidences of CLD (35 vs 33%, P=0.81) or CLD or death (50 vs 43%, P=0.34). Infants in the Early NCPAP group weaned off mechanical ventilation and supplemental oxygen more rapidly than infants in the Pre-early NCPAP group (hazard ratio (HR) 1.80, P=0.002 and HR 1.69, P=0.01). CONCLUSION A policy of early NCPAP has not decreased the incidence of CLD despite a decrease in time to successful tracheal extubation.
Collapse
Affiliation(s)
- P Jegatheesan
- Department of Pediatrics, University of California San Francisco, CA 94143-0748, USA
| | | | | |
Collapse
|
19
|
Hemilä H, Virtamo J, Albanes D, Kaprio J. Vitamin E and Beta-Carotene Supplementation and Hospital-Treated Pneumonia Incidence in Male Smokers. Chest 2004; 125:557-65. [PMID: 14769738 DOI: 10.1378/chest.125.2.557] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Vitamin E and beta-carotene affect various measures of immune function and accordingly might influence the predisposition of humans to infections. However, only few controlled trials have tested this hypothesis. STUDY OBJECTIVE To examine whether vitamin E or beta-carotene supplementation affects the risk of pneumonia in a controlled trial. DESIGN AND SETTING The Alpha-Tocopherol Beta-Carotene Cancer Prevention (ATBC) study, a randomized, double-blind, placebo-controlled trial that examined the effects of vitamin E, 50 mg/d, and beta-carotene, 20 mg/d, on lung cancer using a 2 x 2 factorial design. The trial was conducted in the general community in southwestern Finland in 1985 to 1993; the intervention lasted for 6.1 years (median). The hypothesis being tested in the present study was formulated after the trial was closed. PARTICIPANTS ATBC study cohort of 29,133 men aged 50 to 69 years, who smoked at least five cigarettes per day, at baseline. MAIN OUTCOME MEASURE The first occurrence of hospital-treated pneumonia was retrieved from the national hospital discharge register (898 cases). RESULTS Vitamin E supplementation had no overall effect on the incidence of pneumonia (relative risk [RR], 1.00; 95% confidence interval [CI], 0.88 to 1.14) nor had beta-carotene supplementation (RR, 0.98; 95% CI, 0.85 to 1.11). Nevertheless, the age of smoking initiation was a highly significant modifying factor. Among subjects who had initiated smoking at a later age (> or =21 years; n = 7,469 with 196 pneumonia cases), vitamin E supplementation decreased the risk of pneumonia (RR, 0.65; 95% CI, 0.49 to 0.86), whereas beta-carotene supplementation increased the risk (RR, 1.42; 95% CI, 1.07 to 1.89). CONCLUSIONS Data from this large controlled trial suggest that vitamin E and beta-carotene supplementation have no overall effect on the risk of hospital-treated pneumonia in older male smokers, but our subgroup finding that vitamin E seemed to benefit subjects who initiated smoking at a later age warrants further investigation.
Collapse
Affiliation(s)
- Harri Hemilä
- Department of Public Health, PO Box 41, University of Helsinki, Helsinki, FIN-00014 Finland.
| | | | | | | |
Collapse
|
20
|
Abstract
BACKGROUND Caffeine has a variety of pharmacological effects. It is chemically related to the drug theophylline which is used to treat asthma. Accordingly, interest has been expressed in its potential role as an asthma treatment. A number of studies have explored the effects of caffeine in asthma, this is the first review to systematically examine and summarise the evidence. OBJECTIVES Caffeine is a weak bronchodilator and it also reduces respiratory muscle fatigue. It has been suggested that caffeine may reduce asthma symptoms. The objective of this review was to assess the effects of caffeine on lung function and identify whether there is a need to control for caffeine consumption prior to lung function testing. SEARCH STRATEGY We searched the Cochrane Airways Group trials register and the reference lists of articles. We also contacted study authors. SELECTION CRITERIA Randomised trials of oral caffeine compared to placebo in adults with asthma. DATA COLLECTION AND ANALYSIS Trial quality assessment and data extraction were done independently by two reviewers. MAIN RESULTS Six trials involving a total of 55 people were included. The studies were all of cross-over design and of high quality. In comparison with placebo, caffeine appears to improve lung function for up to two hours after consumption. Forced expiratory volume in one minute showed a small improvement up to two hours after caffeine use (standardised mean difference -0.73, 95% confidence interval -1.20 to -0.25). Mid-expiratory flow rates also showed a small improvement with caffeine and this was sustained up to four hours. REVIEWER'S CONCLUSIONS Caffeine appears to improve airways function modestly in people with asthma for up to four hours. People may need to avoid caffeine for at least four hours prior to lung function testing.
Collapse
Affiliation(s)
- A I Bara
- Department of Public Health Sciences, St George's Hospital Medical School, Cranmer Terrace, Tooting, London, UK, SW17 ORE.
| | | |
Collapse
|
21
|
Song S, Ashley DL. Sample purification for the analysis of caffeine in tobacco by gas chromatography-mass spectrometry. J Chromatogr A 1998; 814:171-80. [PMID: 9718692 DOI: 10.1016/s0021-9673(98)00384-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A commonly used additive to tobacco products is cocoa. A sensitive an selective method was developed to measure caffeine, a marker for cocoa, in tobacco by using gas chromatography-mass spectrometry (GC-MS). Tobacco components usually produce high background signals in GC-MS analysis. Therefore, a series of extraction steps were designed to effectively purify the tobacco extracts. The analytical recovery of caffeine was 100 when [trimethyl-13C3] caffeine was used as an isotope-dilution reference. A linear calibration curve was generated with caffeine concentration ranging from 0.01 to 20 micrograms/ml. The detection limit of caffeine was 0.02 microgram/ml in the final solution. This method was applied to several commercial tobacco products, of which the corresponding caffeine levels varied from below the detection limit to 125 micrograms/g.
Collapse
Affiliation(s)
- S Song
- Division of Environmental Health Laboratory Science, Centers for Disease Control and Prevention, Atlanta, GA 30341
| | | |
Collapse
|
22
|
Abstract
This paper reviews the research literature concerning health and selected behavioral effects of caffeine. Epidemiological and laboratory findings are reviewed to determine the health risks associated with both acute and chronic caffeine exposure. Common sources of caffeine, its properties, and physiological effects are considered. The relationships between caffeine and various health conditions are examined including caffeine's association with heart disease, cancer, and benign breast disease. Caffeine's possible contribution to enhanced exercise performance is discussed along with a brief overview of caffeine's effects on mental and emotional health. Over 100 references cited in this review were part of a more extensive literature base obtained from several on-line services including MEDLINE and LEXIS/NEXIS medical data bases. Other sources of relevant literature included manual searches of research journals and the use of selected references from appropriate articles. The relationship between caffeine consumption and various illnesses such as cardiovascular disease and cancer remains equivocal. Prudence might dictate that pregnant women and chronically ill individuals exercise restraint in their use of caffeine, although research suggests relatively low or nonexistent levels of risk associated with moderate caffeine consumption.
Collapse
Affiliation(s)
- R J Lamarine
- Department of Health and Community Services, California State University, Chico 95929-0505
| |
Collapse
|
23
|
Chou TM, Benowitz NL. Caffeine and coffee: effects on health and cardiovascular disease. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/0742-8413(94)00048-f] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
Dobrocky P, Bennett PN, Notarianni LJ. Rapid method for the routine determination of caffeine and its metabolites by high-performance liquid chromatography. JOURNAL OF CHROMATOGRAPHY 1994; 652:104-8. [PMID: 8014220 DOI: 10.1016/0378-4347(93)e0369-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Caffeine is a popular compound for phenotyping individuals for CYP4501A2, xanthine oxidase (XO) and N-acetyltransferase (NAT) utilising urinary metabolites. The analysis is complex since at least thirteen metabolites are excreted by man. Past methods have been less than satisfactory in that either not all the metabolites have been resolved and/or extractions selective for particular groups of metabolites are required prior to chromatography. We report a method for the rapid analysis of caffeine and metabolites in urine that negates the requirement for an extraction step, and also a method for plasma analysis.
Collapse
Affiliation(s)
- P Dobrocky
- School of Pharmacy, University of Bath, Claverton Down, UK
| | | | | |
Collapse
|
25
|
Henderson JC, O'Connell F, Fuller RW. Decrease of histamine induced bronchoconstriction by caffeine in mild asthma. Thorax 1993; 48:824-6. [PMID: 8211873 PMCID: PMC464710 DOI: 10.1136/thx.48.8.824] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND While high doses of caffeine may affect pulmonary function and bronchial challenge tests in patients with mild asthma, the effects of lower doses (< or = 5 mg/kg) are less well documented. Specific recommendations exist for withholding theophylline, but not caffeine, before bronchoprovocation and pulmonary function testing. METHODS To assess the effect of a single oral dose of caffeine (5 mg/kg) on FEV1 and bronchial responsiveness to histamine a double blind, placebo controlled study was performed in eight patients with mild stable asthma. RESULTS While caffeine had no effect on FEV1, mean (95% confidence interval) log PC20 histamine was significantly higher 150 minutes [caffeine = 0.99 (0.2) mg/ml, placebo = 0.53 (0.29)] and 240 minutes [caffeine = 0.89 (0.24), placebo = 0.44 (0.26)] after administration of caffeine than after placebo. CONCLUSIONS Caffeine should be excluded from the diet for a period of more than four hours before bronchial provocation testing. The exact length of time for which it must be excluded requires further study.
Collapse
Affiliation(s)
- J C Henderson
- Department of Clinical Pharmacology, Royal Postgraduate Medical School, London
| | | | | |
Collapse
|
26
|
O’Hollaren MT. OCCUPATIONAL ASTHMA DUE TO HIGH MOLECULAR WEIGHT ALLERGENS. Immunol Allergy Clin North Am 1992. [DOI: 10.1016/s0889-8561(22)00147-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
27
|
Duffy P, Phillips YY. Caffeine consumption decreases the response to bronchoprovocation challenge with dry gas hyperventilation. Chest 1991; 99:1374-7. [PMID: 2036818 DOI: 10.1378/chest.99.6.1374] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE To determine whether caffeine consumption affects bronchoprovocation challenge (BPC). DESIGN A prospective, double-blind, placebo-controlled, randomized, crossover trial. PATIENTS Eleven nonsmoking men, aged 18 to 42 years, with normal baseline spirometry and evidence of exercise-induced bronchospasm. INTERVENTION On three separate test days, each individual received, in random order, either placebo, 5 mg/kg caffeine, or 10 mg/kg caffeine, and then underwent BPC with eucapnic voluntary hyperventilation (EVH). RESULTS Caffeine (10 mg/kg) significantly reduced bronchoconstriction compared to placebo (p = 0.02). The reduction in bronchoconstriction correlated with the serum level of caffeine (p = 0.014). CONCLUSIONS Caffeine decreases bronchoconstriction due to EVH. Caffeine should be eliminated from diet prior to BPC.
Collapse
Affiliation(s)
- P Duffy
- Department of Medicine, Walter Reed Army Medical Center, Washington, DC 20307-5000
| | | |
Collapse
|
28
|
Bridges RB, Combs JG, Humble JW, Turbek JA, Rehm SR, Haley NJ. Population characteristics and cigarette yield as determinants of smoke exposure. Pharmacol Biochem Behav 1990; 37:17-28. [PMID: 2263659 DOI: 10.1016/0091-3057(90)90036-h] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Relationships of population characteristics, smoking history, and cigarette yield with smoke exposure as measured by peripheral blood concentrations of thiocyanate, carboxyhemoglobin, nicotine and cotinine were sought in 170 male smokers. This population of smokers had significant elevations of serum thiocyanate, blood carboxyhemoglobin and plasma nicotine and cotinine concentrations as compared with an equal number of age- and sex-matched nonsmokers and these concentrations correlated significantly with past 24-hour cigarette consumption. Although the nicotine yield of the cigarette correlated significantly with plasma cotinine and marginally with plasma nicotine, the reduction in plasma nicotine and cotinine was not proportionate to the reduced yield of the cigarettes, suggesting that smokers partially compensate for the lower yields of their cigarettes. Blood levels of carboxyhemoglobin, nicotine and cotinine were also significantly associated with the weight of the subjects, presumably due to the relationship between weight and the volume of distribution. Univariate and multiple regression analyses provided evidence that coffee and alcohol consumption and years smoked also may be important determinants of smoke exposure.
Collapse
Affiliation(s)
- R B Bridges
- Department of Oral Health Science, College of Dentistry, University of Kentucky, Lexington 40536-0084
| | | | | | | | | | | |
Collapse
|
29
|
Colacone A, Bertolo L, Wolkove N, Cohen C, Kreisman H. Effect of caffeine on histamine bronchoprovocation in asthma. Thorax 1990; 45:630-2. [PMID: 2205947 PMCID: PMC462648 DOI: 10.1136/thx.45.8.630] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It was recently reported that caffeine may reduce the clinical symptoms of asthma and may prevent the clinical manifestations of this disease. The effect of caffeine on histamine responsiveness is unknown. The effect of caffeine (5 mg/kg) and placebo on histamine responsiveness (the provocation concentration causing a 20% fall in FEV1, PC20) was studied in 10 subjects with mild asthma (prechallenge FEV1 84% of predicted value). The PC20 for histamine bronchoprovocation after caffeine ingestion was 2.65 (95% confidence limits 0.99, 7.10) mg/ml. After placebo the PC20 was 1.89 (0.96, 3.71) mg/ml. It is concluded that caffeine in a dose equivalent to about three cups of coffee has a very small effect, if any, on histamine bronchoprovocation in those with mild asthma. Specific instructions about not having drinks containing caffeine before histamine challenge are therefore not necessary.
Collapse
Affiliation(s)
- A Colacone
- Department of Medicine, Sir Mortimer B Davis-Jewish General Hospital, Montreal, Quebec, Canada
| | | | | | | | | |
Collapse
|