Race/Ethnicity-Specific Disparities in the Severity of Disease at Presentation in Adults with Ulcerative Colitis: A Cross-Sectional Study

Metagenomic analysis reveals distinct changes in the gut microbiome of obese Chinese children

BACKGROUND

The prevalence of obese children in China is increasing, which poses a great challenge to public health. Gut microbes play an important role in human gut health, and changes in gut status are closely related to obesity. However, how gut microbes contribute to obesity in children remains unclear. In our study, we performed shotgun metagenomic sequencing of feces from 23 obese children, 8 overweight children and 22 control children in Chengdu, Sichuan, China.

RESULTS

We observed a distinct difference in the gut microbiome of obese children and that of controls. Compared with the controls, bacterial pathogen Campylobacter rectus was significantly more abundant in obese children. In addition, functional annotation of microbial genes revealed that there might be gut inflammation in obese children. The guts of overweight children might belong to the transition state between obese and control children due to a gradient in relative abundance of differentially abundant species. Finally, we compared the gut metagenomes of obese Chinese children and obese Mexican children and found that Trichuris trichiura was significantly more abundant in the guts of obese Mexican children.

CONCLUSIONS

Our results contribute to understanding the changes in the species and function of intestinal microbes in obese Chinese children.

Racial and Ethnic Disparities in Patients With Inflammatory Bowel Disease: An Online Survey

BACKGROUND

Data regarding care access and outcomes in Black/Indigenous/People of Color/Hispanic (BIPOC/H) individuals is limited. This study evaluated care barriers, disease status, and outcomes among a diverse population of White/non-Hispanic (W/NH) and BIPOC/H inflammatory bowel disease (IBD) patients at a large U.S. health system.

METHODS

An anonymous online survey was administered to adult IBD patients at Ochsner Health treated between Aug 2019 and Dec 2021. Collected data included symptoms, the Consumer Assessment of Healthcare Providers and Systems and Barriers to Care surveys, health-related quality of life (HRQOL) via the Short Inflammatory Bowel Disease Questionnaire, the Medication Adherence Rating Scale-4, and the Beliefs about Medicines Questionnaire. Medical record data examined healthcare resource utilization. Analyses compared W/NH and BIPOC/H via chi-square and t tests.

RESULTS

Compared with their W/NH counterparts, BIPOC/H patients reported more difficulties accessing IBD specialists (26% vs 11%; P = .03), poor symptom control (35% vs 18%; P = .02), lower mean HRQOL (41 ± 14 vs 49 ± 13; P < .001), more negative impact on employment (50% vs 33%; P = .029), worse financial stability (53% vs 32%; P = .006), and more problems finding social/emotional support for IBD (64% vs 37%; P < .001). BIPOC/H patients utilized emergency department services more often (42% vs 22%; P = .004), reported higher concern scores related to IBD medication (17.1 vs 14.9; P = .001), and worried more about medication harm (19.5% vs 17.7%; P = .002). The survey response rate was 14%.

CONCLUSIONS

BIPOC/H patients with IBD had worse clinical disease, lower HRQOL scores, had more medication concerns, had less access to specialists, had less social and emotional support, and used emergency department services more often than W/NH patients.

Inflammatory Bowel Disease-Associated Colorectal Cancer: Translational and Transformational Risks Posed by Exogenous Free Hemoglobin Alpha Chain, A By-Product of Extravasated Erythrocyte Macrophage Erythrophagocytosis

Colonic inflammatory bowel disease (IBD) encompasses ulcerative colitis (UC) and Crohn's colitis (CC). Patients with IBD are at increased risk for colitis-associated colorectal cancer (CACRC) compared to the general population. CACRC is preceded by IBD, characterized by highly heterogenous, pharmacologically incurable, pertinacious, worsening, and immune-mediated inflammatory pathologies of the colon and rectum. The molecular and immunological basis of CACRC is highly correlated with the duration and severity of inflammation, which is influenced by the exogenous free hemoglobin alpha chain (HbαC), a byproduct of infiltrating immune cells; extravasated erythrocytes; and macrophage erythrophagocytosis. The exogenous free HbαC prompts oxygen free radical-arbitrated DNA damage (DNAD) through increased cellular reactive oxygen species (ROS), which is exacerbated by decreased tissue antioxidant defenses. Mitigation of the Fenton Reaction via pharmaceutical therapy would attenuate ROS, promote apoptosis and DNAD repair, and subsequently prevent the incidence of CACRC. Three pharmaceutical options that attenuate hemoglobin toxicity include haptoglobin, deferoxamine, and flavonoids (vitamins C/E). Haptoglobin's clearance rate from plasma is inversely correlated with its size; the smaller the size, the faster the clearance. Thus, the administration of Hp1-1 may prove to be beneficial. Further, deferoxamine's hydrophilic structure limits its ability to cross cell membranes. Finally, the effectiveness of flavonoids, natural herb antioxidants, is associated with the high reactivity of hydroxyl substituents. Multiple analyses are currently underway to assess the clinical context of CACRC and outline the molecular basis of HbαC-induced ROS pathogenesis by exposing colonocytes and/or colonoids to HbαC. The molecular immunopathogenesis pathways of CACRC herein reviewed are broadly still not well understood. Therefore, this timely review outlines the molecular and immunological basis of disease pathogenesis and pharmaceutical intervention as a protective measure for CACRC.

Inflammatory bowel disease type influences development of elevated liver enzymes

Background and Aim

Up to a third of patients with inflammatory bowel disease (IBD) have elevated liver enzymes (ELE). We evaluated the incidence, predictors, and outcomes associated with ELE in a diverse and vulnerable IBD cohort.

Methods

We retrospectively evaluated 336 IBD patients receiving care at the San Francisco safety net gastroenterology clinics between June 1996 and December 2019. Baseline characteristics were captured at first visit, then patients were followed until last clinic activity or death. Testing and etiology, pattern of ELE defined as transient (<1 month) or persistent (≥1 month), were assessed. Multivariate modeling evaluated predictors of ELE at baseline, new ELE at follow-up, and pattern of ELE.

Results

Baseline median age was 40.3 years, 62% male, 46% White (13% Black, 19% Asian, and 18% Latino), and 59% had ulcerative colitis (UC). Among those without known liver disease (n = 14), 51.6% (166 of 322; 52 at baseline, 114 during follow-up) had ELE. In multivariate logistic regression, 5-aminosalicylic acid use (odds ratio [OR] 2.2, 95% confidence interval [CI]: 1.07-4.4, P = 0.03) and higher body mass index (OR 1.08, 95% CI: 1.02-1.14, P = 0.01) were associated with baseline ELE. In multivariate Cox regression, UC (vs. Crohn's disease [CD]) had a 34% lower risk of developing new ELE during follow-up (hazard ratio [HR] 0.66, 95% CI: 0.46-0.95, P = 0.02). Mortality rate was higher for patients with ELE (0% normal vs 2.3% transient ELE vs 6.5% persistent ELE, P < 0.001).

Conclusion

ELE is prevalent in IBD, especially in CD, and associated with higher rates of mortality. Identification and management of ELE particularly when persistent are important to IBD outcomes.

Neurovascular Dysfunction in Diverse Communities With Health Disparities-Contributions to Dementia and Alzheimer's Disease

Alzheimer's disease and related dementias (ADRD) are an expanding worldwide crisis. In the absence of scientific breakthroughs, the global prevalence of ADRD will continue to increase as more people are living longer. Racial or ethnic minority groups have an increased risk and incidence of ADRD and have often been neglected by the scientific research community. There is mounting evidence that vascular insults in the brain can initiate a series of biological events leading to neurodegeneration, cognitive impairment, and ADRD. We are a group of researchers interested in developing and expanding ADRD research, with an emphasis on vascular contributions to dementia, to serve our local diverse community. Toward this goal, the primary objective of this review was to investigate and better understand health disparities in Alabama and the contributions of the social determinants of health to those disparities, particularly in the context of vascular dysfunction in ADRD. Here, we explain the neurovascular dysfunction associated with Alzheimer's disease (AD) as well as the intrinsic and extrinsic risk factors contributing to dysfunction of the neurovascular unit (NVU). Next, we ascertain ethnoregional health disparities of individuals living in Alabama, as well as relevant vascular risk factors linked to AD. We also discuss current pharmaceutical and non-pharmaceutical treatment options for neurovascular dysfunction, mild cognitive impairment (MCI) and AD, including relevant studies and ongoing clinical trials. Overall, individuals in Alabama are adversely affected by social and structural determinants of health leading to health disparities, driven by rurality, ethnic minority status, and lower socioeconomic status (SES). In general, these communities have limited access to healthcare and healthy food and other amenities resulting in decreased opportunities for early diagnosis of and pharmaceutical treatments for ADRD. Although this review is focused on the current state of health disparities of ADRD patients in Alabama, future studies must include diversity of race, ethnicity, and region to best be able to treat all individuals affected by ADRD.

Asians Have Higher Risk of Developing Pancreatic Necrosis in Inflammatory Bowel Disease Patient Population: A National Inpatient Sample Database Study

Background 

The aim of this study is to evaluate race-associated risk factors of acute pancreatitis (AP) in inflammatory bowel disease (IBD) patients.

Methods 

A retrospective analysis using 2016 and 2017 National Inpatient Sample database was performed. Inclusion criteria were principal diagnosis of AP and a secondary diagnosis of IBD. Patients below 18 years of age were excluded. The primary outcome was in-hospital mortality rate and secondary outcomes included pancreatic necrosis, surgical necrosectomy, total hospitalization charges, total parenteral nutrition use, and length of stay. For the primary and secondary outcomes, adjusted odds ratios (aORs) and mean difference calculation using multivariate regression were calculated.

Results

A total of 7,060 patients with AP in IBD were identified; of which 53.5% were female. The use of Medicaid was significantly higher in blacks (39.5%), Hispanics (32.6%), and Asian/Pacific Islanders (40%) compared to whites (19.9%). Approximately 63.2% of AP patients in IBD received care at an urban teaching hospital. Pancreatic necrosis was noted to be highest in Asians or Pacific Islanders compared to whites (aOR 12.62, 95% CI 1.00-159.3, p = 0.05).

Conclusion

Our study shows that racial disparities exist among AP in IBD patients with pancreatic necrosis being more common in Asians and Pacific Islanders compared to whites. Identification of potential causes of these disparities is of paramount importance to expand access to healthcare.

Ulcerative Colitis: Disease Burden, Impact on Daily Life, and Reluctance to Consult Medical Professionals: Results from a Japanese Internet Survey

Background and Aim

The prevalence of ulcerative colitis has increased in Asian populations in recent years. This Japanese internet survey investigated the symptoms, impact, and treatment of ulcerative colitis, and communication between patients and medical professionals.

Methods

This was a non-interventional analysis of responses from participants with ulcerative colitis who had regularly visited medical providers for their disease in the past year.

Results

In 501 evaluable participants, the mean age was 39.8 years and mean disease duration was 7.6 years. Ulcerative colitis had a "significant impact" on daily life in 43.5% of participants who experienced bowel urgency and 48.6% who experienced bowel incontinence. Although the prevalence of bowel urgency and bowel incontinence was associated with higher stool frequency and rectal bleeding scores (p value for trend <0.0001), they still existed even in patients without frequent stools or rectal bleeding. Around 30% of participants hesitated to discuss symptoms such as bowel incontinence with a medical professional. Approximately three-quarters preferred to use websites for medical information. Most participants (78.0%) had used topical treatments. However, 25.7% were hesitant to use such treatments due to concerns about discomfort (48.1%) and administration difficulty (47.3%).

Conclusions

Ulcerative colitis significantly affects daily life, largely due to symptoms such as bowel urgency and bowel incontinence. Despite desiring to improve bowel incontinence, patients are embarrassed to consult physicians or nurses. Therefore, medical professionals should make an active effort to draw out patients' individual concerns, including symptoms that patients may not initially feel able to talk about openly.

Disability in inflammatory bowel disease patients is associated with race, ethnicity and socio-economic factors

BACKGROUND

Race, ethnicity and socio-economic status impact clinical outcomes in inflammatory bowel disease (IBD) patients. However, their impact on disability has not been studied.

AIM

To determine the association between race, ethnicity and socio-economic factors with disability in IBD, using the validated IBD disability index (IBD-DI).

METHODS

Ambulatory IBD patients were enrolled at five academic centres participating in the New York Crohn's and Colitis Organization. We assessed the IBD-DI, and collected clinical and socio-economic data. Factors associated with moderate-to-severe disability (IBD-DI score > 35) on univariable analysis were tested in multivariable models with adjusted odds ratios (aOR) and 95% confidence intervals (CI) reported.

RESULTS

In this study, 323 patients (57.3% CD, 51.4% female) were enrolled; 17.7% were Hispanic, 17% were non-Hispanic black, 56.0% were non-Hispanic Caucasian and 9.3% belonged to non-Hispanic non-black minority races. However, 39.0% of patients were publicly insured and 38.4% of patients had low annual household income (<$50 000). 100 (31.0%) patients reported moderate-to-severe disability. On multivariable analysis, Hispanic ethnicity (aOR 2.7, 95% CI 1.3-5.6), non-Hispanic non-black minority race (aOR 3.5, 95% CI 1.3-8.9), public payer (aOR 2.1, 95% CI 1.1-4.0) and low annual household income (aOR 3.0, 95% CI 1.7-5.4) were associated with moderate-to-severe disability controlling for disease characteristics.

CONCLUSIONS

IBD patients who are minorities, have public insurance, or low household income, are 2-3 times more likely to report moderate-to-severe disability independent of disease characteristics in the United States. Future studies are needed to study their complex relationship and to mitigate disability.

Ethnicity-Influenced Microbiota: A Future Healthcare Perspective

Global research is focused on understanding the factors affecting human gut microbiota vis-à-vis health. Brooks et al. [PLoS Biol. (2018) 16, e2006842] has reported a group of microbial taxa that vary across ethnicity in the USA (AGP and HMP data sets). Ethnicity-specific microbial signatures will aid in developing therapeutics for targeted microbiota modulation.

Gut microbiota diversity across ethnicities in the United States

Composed of hundreds of microbial species, the composition of the human gut microbiota can vary with chronic diseases underlying health disparities that disproportionally affect ethnic minorities. However, the influence of ethnicity on the gut microbiota remains largely unexplored and lacks reproducible generalizations across studies. By distilling associations between ethnicity and differences in two US-based 16S gut microbiota data sets including 1,673 individuals, we report 12 microbial genera and families that reproducibly vary by ethnicity. Interestingly, a majority of these microbial taxa, including the most heritable bacterial family, Christensenellaceae, overlap with genetically associated taxa and form co-occurring clusters linked by similar fermentative and methanogenic metabolic processes. These results demonstrate recurrent associations between specific taxa in the gut microbiota and ethnicity, providing hypotheses for examining specific members of the gut microbiota as mediators of health disparities.