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1.
LGBT Health ; 2024 Apr 01.
Article in English | MEDLINE | ID: mdl-38557209

ABSTRACT

Purpose: Lesbian, gay, bisexual, transgender, and queer (LGBTQ) individuals are more likely to smoke than non-LGBTQ individuals. Smoking has been posited as a coping mechanism for LGBTQ individuals facing minority stress. However, the exact relationship between minority stress and smoking behaviors among LGBTQ individuals is unclear. Therefore, the purpose of this systematic review was to examine how minority stress processes are associated with smoking behaviors for LGBTQ individuals. Methods: Searches of the PubMed and PsycINFO databases were conducted for smoking-, LGBTQ-, and minority stress-related terms. No date, geographic, or language limits were used. For inclusion, the study must have (1) been written in English, (2) had an LGBTQ group as the study population or a component of the study population, (3) assessed the cigarette smoking status of patients, and (4) assessed at least one minority stress-related process (internalized stigma, perceived stigma, or prejudice events). Results: The final review included 44 articles. Aside from two outlier studies, all of the reviewed studies exhibited that increased levels of minority stress processes (internalized queerphobia, perceived stigma, and prejudice events) were associated with increased probability of cigarette use in LGBTQ individuals. Increased minority stress was also associated with greater psychological distress/mental health decline. Conclusion: The findings of this review suggest that minority stress processes represent a contributing factor to smoking health disparities in LGBTQ populations. These results highlight the need for smoking cessation and prevention programs to address minority stress and improve smoking disparities in these populations.

2.
LGBT Health ; 11(4): 301-309, 2024.
Article in English | MEDLINE | ID: mdl-38100214

ABSTRACT

Purpose: Minority stress has been posited as a cause for sexual and gender minority (SGM) individuals to smoke as a coping mechanism. The purpose of this study was to elucidate the relationship between minority stress processes and nicotine dependence level and stage of change for SGM smokers living in the Deep South region of the United States. Methods: A one-time, cross-sectional online survey was administered to SGM smokers living in the Deep South. Survey measurements included demographics, minority stress processes (prejudice events, perceived stigma, and internalized queerphobia), and smoking cessation outcomes (nicotine dependence level and stage of change). Multivariable linear regression was used to assess the effect of each minority stress process on smoking outcomes, after adjusting for demographics and stratifying by gender and sexual identity. Results: Across all participants (n = 1296), lower levels of perceived stigma were significantly associated with further stage of change. Greater levels of internalized queerphobia were significantly associated with greater nicotine dependence level. After stratifying by gender and sexual identity, these significant associations were only maintained in cisgender males and gay individuals. An additional significant association between lower prejudice events and further stage of change for smoking cessation was found only for individuals whose sexual identity was labeled as "other." Conclusion: Addressing minority stress in smoking cessation and prevention programs has the potential to decrease nicotine dependence and further stage of change.


Subject(s)
Sexual and Gender Minorities , Social Stigma , Stress, Psychological , Tobacco Use Disorder , Humans , Male , Sexual and Gender Minorities/psychology , Sexual and Gender Minorities/statistics & numerical data , Female , Tobacco Use Disorder/psychology , Tobacco Use Disorder/epidemiology , Adult , Cross-Sectional Studies , Stress, Psychological/psychology , Middle Aged , Smoking Cessation/psychology , Smoking Cessation/statistics & numerical data , Smokers/psychology , Smokers/statistics & numerical data , Surveys and Questionnaires , United States/epidemiology , Young Adult
3.
Nutrients ; 15(15)2023 Jul 25.
Article in English | MEDLINE | ID: mdl-37571227

ABSTRACT

Body mass index (BMI) as well as sugar-sweetened beverages (SSB) has been suggested to independently decrease 25-hydroxyvitamin D (25(OH)D). However, the relationship between SSB, BMI, and 25(OH)D is uncertain. This study aimed to investigate the potential mediating role of BMI in the association between SSB intake and 25(OH)D. A total of 4505 representative U.S. adults aged above 20 years and without liver conditions were selected from the 2013-2014 NHANES. All analyses were performed under survey modules with appropriate sampling weights. The prevalence of 25(OH)D insufficiency and deficiency was 37.8% and 24.1% in U.S. adults, respectively. Compared with non-SSB consumers, an increased risk of vitamin D deficiency was found in either heavy SSB consumers or soda consumers, respectively (aOR = 2.10, 95% CI = 1.25-3.54 in heavy SSB consumers; aOR = 1.61, 95% CI = 1.06-2.44 in soda consumers). Around 21.3% of the total effect of sugar intake from SSB on decreased 25(OH)D was explained by BMI. In conclusion, high total sugar intake from SSB and BMI independently contribute to lower 25(OH)D, and BMI mediates the inverse association between total sugar intake from SSB intake and 25(OH)D. Furthermore, an increased risk of having vitamin D deficiency was found in the population who consumed higher levels of sugar from SSB or soda drinks.


Subject(s)
Sugar-Sweetened Beverages , Vitamin D Deficiency , Adult , Humans , Body Mass Index , Nutrition Surveys , Calcifediol , Vitamin D Deficiency/epidemiology , Sugars , Beverages/analysis
4.
Transl Behav Med ; 12(10): 1018-1027, 2022 11 16.
Article in English | MEDLINE | ID: mdl-36130313

ABSTRACT

WeChat is the largest social media platform in China, yet few WeChat-based smoking cessation interventions have been investigated to date. The objective of this study was to develop and test the feasibility of a WeChat-based smoking cessation intervention for smokers in China. Participants were recruited using WeChat and were then randomized into one of three groups: the Standard Group, the Enhanced Group, and the wait-list Control Group. Feasibility indicators including program reach, recruitment rate, recruitment efficiency, cost per person, attrition rate, intervention message exposure, group discussion utilization rate, intervention message engagement, satisfaction, and the likelihood of recommending to others were measured with assessed. Analyses included Chi-square and Fisher exact test, as well as analysis of variance test. A responsive participant is defined as a participant that responded to a certain assessment. A total of 1,132 individuals connected with ("friended") our project on WeChat between July 1 and August 5, 2019. Of these, 403 were eligible to participate, consented, and completed the baseline assessment. As a result, 136, 135, and 132 smokers were randomly assigned to the Standard Group, the Enhanced Group, and the Control Group, respectively. The total program recruitment rate was 35.6% and the attrition rate was 46.4%. The program cost was $0.85 per person. All responsive participants read at least one message during the intervention and engaged with intervention messages 56.8% of the time. Most responsive participants reported being very or somewhat satisfied, highly or somewhat engaged, and were willing to recommend our program to others. This study demonstrated the feasibility of a smoking cessation interventions using WeChat. The program could be expanded to deliver smoking cessation interventions to a large population of smokers.


Subject(s)
Smoking Cessation , Social Media , Humans , Smokers , Feasibility Studies , Behavior Therapy
5.
Internet Interv ; 28: 100511, 2022 Apr.
Article in English | MEDLINE | ID: mdl-35646606

ABSTRACT

Background: China is the largest tobacco producer and has the highest number of tobacco consumers in the world. Extensive research has demonstrated the utility of social media for smoking cessation. WeChat is the most commonly used social media platform in China, but has not yet been utilized for smoking cessation interventions. The objectives of this study are (1) to evaluate the efficacy of a WeChat-based smoking cessation intervention; and (2) to examine a possible additive effect of integrating oral health and smoking-related information into a tailored, Transtheoretical Model (TTM) guided smoking cessation intervention. Methods: Eligible adults were recruited through WeChat from July 1 to August 6, 2019, to participate in a 3-arm, single-blinded, randomized controlled trial. We enrolled and randomized 403 participants into three groups: the Standard Group, Enhanced Group, or a Waitlist-Control Group. Participants in the Standard Group received 20 smoking cessation-related messages for 2 weeks; participants in the Enhanced Group received this same protocol plus 6 oral health-related messages over an additional week. Participants in the Control Group received smoking cessation-related messages, after the post-intervention assessment. The primary outcome was TTM Stage of Change, and the secondary outcomes were 7-day Point Prevalence Abstinence (PPA), 24-h PPA, daily cigarette use, and nicotine dependence at 4 weeks follow-up post intervention, comparing intervention groups with the control group. The overall program attrition rate was 46%. Paired t-tests, McNemar tests, and linear and logistic regression were used to examine differences in smoking cessation outcomes within and between groups. Results: Participants in the Enhanced Group (ß = -1.28, 95%CI: -2.13, -0.44) and the Standard Group (ß = -1.13, 95%CI: -1.95, -0.30) reported larger changes in nicotine dependence scores, compared to participants in the Waitlist Group. No statistically significant differences were found between the Enhanced Group and the Standard Group. Discussion: This WeChat-based intervention was effective for smoking cessation overall. The addition of oral health information did not significantly improve the intervention.

6.
Article in English | MEDLINE | ID: mdl-36613000

ABSTRACT

Excessive sugar-sweetened beverages (SSB) consumption and abdominal obesity have been independently linked to numerous disorders, including diabetes and elevated C-reactive protein (CRP). This study aimed to explore the association between SSB intake, abdominal obesity, and inflammation in normal and prediabetic adults. Sugar intake from SSBs was calculated from 24-h dietary recalls and further classified into non-, medium-, and high-intake. The status of non- and prediabetes was identified based on hemoglobin A1c level. All analyses were performed under a survey module with appropriate sampling weights to control for the complex survey design. A total of 5250 eligible adults without diabetes were selected from the 2007-2010 NHANES. A 1.31-fold increased risk of developing prediabetes was observed in people who consumed high sugar from SSBs when compared to non-SSB consumers. Among individuals with prediabetes, adults who consumed a high amount of sugar from SSB had a 1.57-fold higher risk to increase CRP when compared to non-SSB consumers, even after adjusting for abdominal obesity. Furthermore, the association between the high amount of sugar intake from SSBs and elevated CRP was strengthened by abdominal obesity in prediabetes (p for interaction term = 0.030). Our findings highlight that a positive association between sugar intake from SSBs and CRP levels was only observed in US adults with prediabetes. Abdominal obesity may strengthen this effect in prediabetic adults with a high amount of sugar intake from SSBs.


Subject(s)
Diabetes Mellitus , Prediabetic State , Sugar-Sweetened Beverages , Humans , Adult , Prediabetic State/epidemiology , Prediabetic State/complications , Obesity, Abdominal/epidemiology , Obesity, Abdominal/complications , Beverages , Nutrition Surveys , Obesity/epidemiology , Obesity/etiology , Inflammation/epidemiology , Inflammation/complications , Sugars
7.
Front Public Health ; 9: 792572, 2021.
Article in English | MEDLINE | ID: mdl-34966715

ABSTRACT

Although lycopene intake and risk of prostate cancer have been explored for decades, recent studies show that Non-Hispanic Black Prostate Cancer (PCa) patients benefit less than Non-Hispanic White patients from a lycopene intake intervention program. This study examined whether a lycopene intake-related racial disparity exists in reducing the risk of PCa in healthy adults. Data on healthy, cancer-free Non-Hispanic Black (NHB) men (n = 159) and Non-Hispanic White (NHW) men (n = 478) from the 2003 to 2010 NHANES dataset were analyzed. Total lycopene intake from daily diet, age, living status, race/ethnicity, education level, poverty income ratio, body mass index, and smoking status were studied as independent variables. The combination of total Prostate-Specific Antigen (PSA) level and the ratio of free PSA was set as criteria for evaluating the risk of PCa. Multivariable logistic regression was used in race-stratified analyses to compute odds ratios (OR) and 95% confidence intervals (95% CI) comparing high PCa risk with low PCa risk. We found, in the whole population, race/ethnicity was the only factor that influenced lycopene intake from the daily diet. NHB men consumed less lycopene than NHW men (3,716 vs. 6,487 (mcg), p = 0.01). Sufficient lycopene intake could reduce the risk of PCa (OR: 0.40, 95% CI: 0.18-0.85, p = 0.02). Men aged between 66 and 70 had high PCa risk (OR: 3.32, 95% CI: 1.12-9.85, p = 0.03). Obesity served as a protective factor against the high risk of PCa (OR: 0.25, 95% CI: 0.12-0.54, p = 0.001). NHW men aged between 66 and 70 had a high risk of PCa (OR: 4.01, 95% CI: 1.02-15.73, p = 0.05). Obese NHW men also had lower risk of PCa (OR: 0.18, 95% CI: 0.07-0.47 p = 0.001). NHB men had a high risk of PCa compared to NHW men (OR: 2.27, 95% CI: 1.35-3.81 p = 0.004). NHB men who were living without partners experienced an even higher risk of PCa (OR: 3.35, 95% CI: 1.01-11.19 p = 0.07). Sufficient lycopene intake from daily food could serve as a protector against PCa. Such an association was only observed in NHW men. Further studies are needed to explore the dose-response relationship between lycopene intake and the association of PCa risk in NHB men.


Subject(s)
Prostate-Specific Antigen , Prostatic Neoplasms , Black or African American , Aged , Cross-Sectional Studies , Humans , Lycopene , Male , Nutrition Surveys , Prostatic Neoplasms/diagnosis , Prostatic Neoplasms/epidemiology , White People
8.
Front Public Health ; 9: 745925, 2021.
Article in English | MEDLINE | ID: mdl-34957010

ABSTRACT

The COVID-19 pandemic has disrupted much of day-to-day life in the US and around the world. Smokers have a higher risk of adverse outcomes due to COVID-19. This study investigated the impact of COVID-19 on risky behaviors and health changes in lower income African-American smokers eligible for Low dose computed tomography (LDCT) screening, who may be more adversely impacted by the COVID-19 pandemic. A total of 22 African-American daily smokers who were eligible for LDCT screening participated in this study. The mean age of participants was 61.2 years old (SD = 4.7), 77.3% of the smokers were female, all participants had an income below $20,000, and 63.6% were on Medicaid. Descriptive statistics were used to provide summary information on demographics, COVID-19, and health status. Results showed that participants increased cigarette smoking, spent more time on screens, increased sugary drink consumption, consumed more vegetables and fruits, and engaged in more gardening activities during the COVID-19 pandemic. However, participants also decreased physical activity time and slept less during the pandemic. In general, more than one-third of participants gained more body weight and reported increased stress and anxiety. Our results suggest that African-American smokers who qualify for LDCT screening should be encouraged to consider strategies not only for smoking cessation, but also risky behavior control and management.


Subject(s)
COVID-19 , Lung Neoplasms , Black or African American , Early Detection of Cancer , Female , Humans , Lung Neoplasms/epidemiology , Middle Aged , Pandemics , SARS-CoV-2 , Smokers , United States/epidemiology
9.
Article in English | MEDLINE | ID: mdl-34769707

ABSTRACT

Introduction: Although smoking prevalence has recently declined, the smoking prevalence in China remains high. Extensive research has demonstrated ways that social media can assist in quitting smoking. WeChat is the most commonly used social media platform in China but has not been used for smoking cessation. A process evaluation of a novel WeChat-based smoking cessation intervention was conducted to measure its efficacy of content delivery, participant satisfaction, engagement, and likelihood of recommendation to others. Methods: A three-week, three-arm, single-blind randomized control trial was established. WeChat was used to recruit 403 participants and to deliver intervention messages and process evaluation surveys to them. Recruitment advertisements were posted on an official WeChat account and were forwarded to WeChat Moments. Intervention messages were delivered once a day during weekdays, using the WeChat broadcasting messages function, with two messages being sent each time. Process evaluation surveys were organized using Wenjuanwang and were delivered via WeChat. Process assessments were conducted every Friday to assess intervention message receipt, satisfaction level, engagement level, and recommendation to others. The receipt of intervention messages was measured by a self-reported question indicating which messages were read each week. Satisfaction was measured by a five-item Likert scale survey. Engagement was measured by a one-item Likert scale survey. Recommendation to others was measured by one self-reported question. Results: Participants read an average of 4.76 (out of 10), 5.80 (out of 10), and 4.25 (out of 6) messages at week 1, week 2, and week 3, respectively. The second messages were less likely to be read compared to the first messages (52.3% vs. 61.6%, respectively). Moreover, within each single week, the number of participants who read the intervention messages gradually decreases over time. Picture-based intervention messages tended to be less likely to be read than video-based intervention messages. Total program satisfaction scores ranged between 5 and 25, and the overall scores for satisfaction for each week were 21.55, 22.27, and 22.76, respectively. No significant differences were found in all the satisfaction indicators between groups. More than 60% of participants reported being either highly engaged or somewhat engaged each week. In addition, most participants (93.0% at week 1, 95.8% at week 2, and 96.2% at week 3) reported that they were willing to recommend our program to others. Discussion: A WeChat-based smoking cessation intervention for Chinese smokers was implemented and evaluated. For future studies, one should consider sending messages of a higher importance as the first message of a given day. Smokers had a higher rate of reading intervention messages at the beginning part of each week, during which, relatively important messages should be prioritized. One might also consider alternating the topics and formats of the messages for a better engagement of the users in future studies.


Subject(s)
Smoking Cessation , China/epidemiology , Humans , Single-Blind Method , Smokers , Smoking
10.
Front Public Health ; 9: 712635, 2021.
Article in English | MEDLINE | ID: mdl-34476230

ABSTRACT

Research has shown cigarette smoking is a major risk factors for many type of cancer or cancer prognosis. Tobacco related health disparities were addressed continually in cancer screening, diagnosis, treatment, prevention and control. The present study evaluated the health disparities in attendance of smoking cessation counseling classes for 4,826 patients scheduled to attend between 2005 and 2007. Of 3,781 (78.4%) patients with records to calculate the distance from their home domicile to counseling sites using Geographic Information System technology, 1,435 (38%) of smokers who attended counseling had shorter travel distances to counseling sites (11.6 miles, SD = 11.29) compared to non-attendees (13.4 miles, SD = 16.72). When the travel distance was >20 miles, the estimated odds of attending decreased with greater travel distance. Smokers who actually attended were more likely to be older, female, White, living in urban areas, and receiving free healthcare. After controlling for other socio-demographic factors, shorter distances were associated with greater class attendance, and individuals more likely to attend included those that lived closer to the counseling site and in urban settings, were female, White, commercially insured, and older than their counterparts. These findings have the potential to provide important insights for reducing health disparities for cancer prevention and control, and to improve shared decision making between providers and smokers.


Subject(s)
Smoking Cessation , Female , Geographic Information Systems , Health Services Accessibility , Hospitals, Public , Humans , Louisiana , Technology
11.
Article in English | MEDLINE | ID: mdl-34201450

ABSTRACT

INTRODUCTION: Tobacco use, which is directly responsible for 10% of total deaths per year globally, remains consistently high, with approximately 20% of the population reporting regular consumption globally. Moreover, health disparities regarding tobacco consumption and smoking cessation are growing between rural and urban populations worldwide. Social media interventions for tobacco cessation may effectively reach both groups. The objective of this study was to evaluate the efficacy of a WeChat-delivered smoking cessation intervention among rural and urban Chinese smokers, and to assess moderating variables that may contribute to differential intervention efficacy. METHODS: WeChat was used to recruit smokers into this intervention study between 1 July and 5 August 2019. Participants were randomized to one of three intervention schedules: participants in the Standard Group and the Enhanced Group received 20 smoking-related messages over 2 weeks, whereas participants in the Enhanced Group received an extra 6 oral health-related messages for one week. Participants in the control group received 20 smoking-related messages after the post-intervention assessment. Participants completed questionnaires at baseline and at 4 weeks follow-up. Our primary outcome was smoking cessation stage of change and secondary outcome was 24-h point prevalence abstinence (PPA). Urban and rural areas were based on self-reported living areas. Chi-squared test, Fisher's exact test, ANOVA test, linear regression, and logistic regression were used for analysis. RESULTS: Overall, 403 participants completed the intervention (233 rural, 107 suburban, 63 urban). Compared to urban participants, rural participants were more likely to have progressed to a later stage of change (ß = 0.40, 95% CI: 0.13, 0.67) and to report higher 24-h PPA rates at follow-up (aOR = 3.23, 95% CI: 1.36, 7.68). After stratification by living area, the intervention effects in stage of change and 24-h PPA rate at follow-up were only found in the urban subgroup. DISCUSSION: Smokers who lived in rural areas reported better smoking cessation outcomes compared with urban smokers; however, the efficacy of a WeChat-based smoking cessation intervention was only found for participants living in an urban area. WeChat based smoking cessation interventions should be used to promote smoking cessation in urban, suburban, and rural areas.


Subject(s)
Smoking Cessation , Tobacco Use Cessation , China/epidemiology , Humans , Smokers , Smoking
12.
Prev Chronic Dis ; 18: E71, 2021 07 15.
Article in English | MEDLINE | ID: mdl-34264811

ABSTRACT

We investigated the association between the 5As (Ask, Advise, Assess, Assist, and Arrange) clinical protocol and stage of change among African American smokers who are eligible for low-dose computed tomography screening. In 2019, 60 African American daily smokers aged 55 years or older were recruited in a large hospital in New Orleans, Louisiana. Smokers who received assistance for smoking cessation were more likely to be in the preparation stage than those who did not receive any assistance. Assistance from health professionals is an essential form of support and may substantially enhance smokers' motivation to quit smoking in this population that is at higher risk for mortality from lung cancer.


Subject(s)
Black or African American/psychology , Early Detection of Cancer/methods , Lung Neoplasms/ethnology , Smokers/psychology , Smoking Cessation/ethnology , Tomography, X-Ray Computed/methods , Aged , Aged, 80 and over , Female , Humans , Lung Neoplasms/prevention & control , Male , Middle Aged , Smokers/statistics & numerical data , Smoking , Smoking Cessation/psychology
13.
Public Health Nutr ; 24(17): 5756-5768, 2021 12.
Article in English | MEDLINE | ID: mdl-33541468

ABSTRACT

OBJECTIVE: To evaluate age-related differences in the independent/combined association of added sugar intake from soda and body adiposity with hyperuricaemia in gender-stratified US adults. DESIGN: Consumption of added sugar from soda was calculated from 24-h dietary interviews and categorised into none, regular and excessive consumption. Hyperuricaemia was defined as serum uric acid levels >417 mmol/l in men and >357 mmol/l in women. Multiple regression models with interaction terms and logistic models adjusted for covariates were conducted under survey-data modules. SETTING: National Health and Nutrition Examination Survey during 2007-2016. PARTICIPANTS: 15 338 adults without gout, failing kidneys, an estimated glomerular filtration rate < 30 or diabetes were selected. RESULTS: The age-stratified prevalence rate of hyperuricaemia was 18·8-20·4 % in males and 6·8-17·3 % in females. Hyperuricaemia prevalence of approximately 50 % was observed in young and middle age males who consumed excessive added sugar from soda. Excessive added sugar intake was observed to be associated with 1·5- to 2·0-fold and 2·0- to 2·3-fold increased risk of the probability of hyperuricaemia in young and middle age males and middle age females, respectively. Study participants, regardless of age or gender, who were obese and consumed excessive added sugar from soda had the highest risk of having hyperuricaemia. CONCLUSIONS: Our study revealed that the association between hyperuricaemia and consumption of excessive added sugar from soda may vary by age and gender. Obese adults who consumed excessive added sugar from soda had the highest risk of hyperuricaemia, a finding that was found across all age-specific groups for both genders.


Subject(s)
Hyperuricemia , Adiposity , Adult , Carbonated Beverages/adverse effects , Female , Humans , Hyperuricemia/epidemiology , Hyperuricemia/etiology , Male , Middle Aged , Nutrition Surveys , Obesity/epidemiology , Obesity/etiology , Uric Acid
14.
Transl Cancer Res ; 8(Suppl 4): S431-S442, 2019 Jul.
Article in English | MEDLINE | ID: mdl-35117119

ABSTRACT

BACKGROUND: The purpose of this study is to investigate knowledge, attitudes, and smoking cessation needs for African Americans who receive low dose computed tomography (LDCT) in an effort to reduce the health burden of lung cancer. METHODS: A mixed method study was conducted among African Americans who received LDCT. Data were gathered using a self-administered questionnaire and structured in-depth interview. Descriptive statistics were used to provide summary information on knowledge, attitude and smoking behaviors. Thematic analysis was used to analyze interview data. The sample size for both the quantitative and qualitative approach was fifteen. RESULTS: The results showed that 73% of participants were male, the mean age was 61.8 (SD =4.6) years old, and 66.7% of participants had an income less than $20,000. Eighty percent had an education level of high school or below and 73.3% were overweight or obese. Smoking history was long (mean years =39 SD =14.9), but the number of cigarettes smoked per day was low (mean =9.2 SD =7.3), and 64% of the patients had a low nicotine dependence. Assessment of knowledge and attitudes towards LDCT revealed that participants had a moderate/lower knowledge score (mean =4.3 SD =2.6), and most had a positive attitude. All participants planned to quit smoking, with 73% planning to quit within the next 6 months. Similar findings were also observed in the qualitative analysis. CONCLUSIONS: African Americans who receive LDCT lung cancer screening in this study have a moderate/lower knowledge score and positive attitude towards LDCT. Most were not heavy smokers and had a lower nicotine dependence. Understanding the factors associated with smoking cessation among at-risk African American smokers will help reduce disparities in lung cancer burden, and is important to improve health for medically underserved minority populations.

15.
Am J Physiol Cell Physiol ; 312(1): C47-C55, 2017 Jan 01.
Article in English | MEDLINE | ID: mdl-27806940

ABSTRACT

Zn2+ deficiency (ZnD) is comorbid with chronic kidney disease and worsens kidney complications. Oxidative stress is implicated in the detrimental effects of ZnD. However, the sources of oxidative stress continue to be identified. Since NADPH oxidases (Nox) are the primary enzymes that contribute to renal reactive oxygen species generation, this study's objective was to determine the role of these enzymes in ZnD-induced oxidative stress. We hypothesized that ZnD promotes NADPH oxidase upregulation, resulting in oxidative stress and kidney damage. To test this hypothesis, wild-type mice were pair-fed a ZnD or Zn2+-adequate diet. To further investigate the effects of Zn2+ bioavailability on NADPH oxidase regulation, mouse tubular epithelial cells were exposed to the Zn2+ chelator N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN) or vehicle followed by Zn2+ supplementation. We found that ZnD diet-fed mice develop microalbuminuria, electrolyte imbalance, and whole kidney hypertrophy. These markers of kidney damage are accompanied by elevated Nox2 expression and H2O2 levels. In mouse tubular epithelial cells, TPEN-induced ZnD stimulates H2O2 generation. In this in vitro model of ZnD, enhanced H2O2 generation is prevented by NADPH oxidase inhibition with diphenyleneiodonium. Specifically, TPEN promotes Nox2 expression and activation, which are reversed when intracellular Zn2+ levels are restored following Zn2+ supplementation. Finally, Nox2 knockdown by siRNA prevents TPEN-induced H2O2 generation and cellular hypertrophy in vitro. Together, these findings reveal that Nox2 is a Zn2+-regulated enzyme that mediates ZnD-induced oxidative stress and kidney hypertrophy. Understanding the specific mechanisms by which ZnD contributes to kidney damage may have an important impact on the treatment of chronic kidney disease.


Subject(s)
Kidney/enzymology , NADPH Oxidases/metabolism , Oxidative Stress , Renal Insufficiency, Chronic/enzymology , Renal Insufficiency, Chronic/pathology , Zinc/deficiency , Animals , Female , Kidney/pathology , Male , Mice , Zinc/metabolism
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