Young African Americans Research Articles

The pragmatics of black–white conversations: Richard Wright’s representation of the African American experience

Abstract Richard Wright represents the African American experience of white racism in his novel Native Son and autobiography Black Boy. In the two works, Wright delves into the psychic effects of white racism on young African Americans. From a pragmatic perspective, this article analyzes the conversations between whites and young African Americans in the two works, with the aim of exploring how the conversations can impact on how the young African Americans think about reality and about themselves in relation to whites, that is, how whites attempt to form black subjectivity through conversation. The conversational mechanisms of the formation of black subjectivity are investigated by building on research in pragmatics on conversational cooperation and interpersonal pragmatics. The article first examines the structural features of black-white conversations, and explains the conversational norms by using Grice’s theory of conversation as the explanatory framework. The analysis sheds light on the relative nature of Grice’s maxims and the inseparability of the informational and the relational aspects of conversation. The article examines the relationship dynamics of black-white conversations by drawing on studies in interpersonal pragmatics. From the stylistic feature of the use of address terms, the study delves into the interracial pragmatics of black–white conversations.

Risk factors for second primary breast cancer by laterality, age, and race and ethnicity.

Epidemiologic studies of risk factors for second primary breast cancer (SBC) have been conducted primarily in non-Hispanic White (NHW) women. A racially- and ethnically-diverse population-based pooled cohort of 9,639 women with first primary stage I-III invasive breast cancer (FBC) was linked with the California Cancer Registry; 618 contralateral SBC (CSBC) and 278 ipsilateral SBC (ISBC), diagnosed >6 months after FBC, were identified. Using Fine and Gray models accounting for competing risks, we assessed associations of CSBC and ISBC risk with FBC clinical characteristics and epidemiologic factors. In younger women (FBC at age <50 years), higher CSBC risk was associated with ER/PR-negative FBC [hazard ratio (HR)=1.68], breast cancer family history (HR = 2.20), and nulliparity (HR = 1.37). In older women (FBC at age ≥50 years), higher risk was associated with breast cancer family history (HR = 1.32), premenopausal status (HR = 1.49), overweight (HR = 1.39), and higher alcohol consumption (HR = 1.34). For ISBC, higher risk was associated with married status (HR = 1.94) in younger women, and overweight (HR = 1.60) among older women. For CSBC, HR estimates were generally similar across racial and ethnic groups. Even after adjustment for these risk factors, compared with NHW women, risk remained elevated for CSBC in younger African American, Asian American, and Hispanic women, and for ISBC in older African American and Hispanic women with ER/PR-positive FBC. Our findings support genetic risk evaluation, enhanced screening, and lifestyle changes in women at higher risk of SBC. Additional risk factors must contribute to the unequal burden of SBC across racial and ethnic groups.

Abstract P362: The Associations of Neighborhood Social and Built Environments with Ambulatory Blood Pressures in Young Adults of the Georgia Stress and Heart Cohort

Ambulatory blood pressure monitoring (ABPM) is an assessment method in which BP measurements are taken at regular intervals when individuals are awake and asleep, during a typical 24-hour period. Thus, ABPM is an accurate and effective way to measure BP. Neighborhood social and built environments play an important role in health, which were previously associated with cardiovascular risk factors. However, the effects of neighborhood social and built environments on ABPM is understudied, particularly among young adults and African Americans. The current study aimed to investigate the cross-sectional associations between neighborhood social and built environments and ABPM in our Georgia Stress and Heart Cohort consisting of 543 participants, aged 29.1 ± 3.6 years, 49.7% African American and 51.2% female. There were found to be consistent positive associations of neighborhood social and built environments with 24-hour systolic BP (SBP), 24-hour diastolic BP (DBP), daytime SBP, daytime DBP, nighttime SBP, and nighttime DBP ( p ≤0.01, respectively), after the adjustment for age, race and sex. Neighborhood factors such as Median Household Income and College Graduation held the negative associations with measurements of 24-hour SBP, 24-hour DBP daytime SBP, daytime DBP, nighttime SBP, nighttime DBP, and 24-hour SBP ( p ≤0.01, respectively). This study is one of the first to report the relationship between neighborhood social and built environments and ABP, particularly in young adults and African Americans residing in the US southeastern region. Future longitudinal studies are warranted to further support the findings of the current study.

Periodontal inflammatory and microbial profiles in healthy young African Americans and Caucasians.

This study aimed to compare microbial and inflammatory profiles in periodontally/systemically healthy African American (AA) and Caucasian (C) individuals. Thirty-seven C and 46 AA aged from 5 to 25 years were evaluated regarding periodontal disease, caries, microbial subgingival profile via 16-s sequencing, as well as salivary and gingival crevicular fluid (GCF) inflammatory profile via multiplex assay. Greater probing depth percentage was detected in AA (p = .0075), while a higher percentage of caries index (p = .0069) and decayed, missing, filled teeth (DMFT) index (p = .0089) was observed in C, after adjusting for number of teeth, sex and age. Salivary levels of IL-6, IL-8 and TNFα were higher for C, whereas GCF levels of eotaxin, IL-12p40, IL-12p70, IL-2 and MIP-1α were higher in AA (p < .05). Different microbial profiles were observed between the races (p = .02). AA presented higher abundance of periodontopathogens (such as Tanerella forsythia, Treponema denticola, Filifactor alocis, among others), and C presented more caries-associated bacteria (such as Streptococcus mutans and Prevotella species). Bacillaceae and Lactobacillus species were associated with higher DMFT index, whereas Fusobacterium and Tanerella species with periodontal disease parameters. A different inflammatory and bacterial profile was observed between healthy AA and C, which may predispose these races to higher susceptibility to specific oral diseases.

Sex difference in cardiac autonomic function in African American adults

African American (AA) individuals in the United States have the highest prevalence of hypertension, with an age-adjusted prevalence of 55.8% in AA men and 56.9% in women. Compared to other racial groups, the AA population also has a two- to three-fold higher mortality rate resulting from hypertension-related causes. Furthermore, AA men exhibit a higher mortality rate than AA women. Previous studies have demonstrated sex differences in some biological mechanisms linked to the increased cardiovascular disease risk in the AA population —such as impaired vascular function and elevated oxidative stress. However, it is unknown whether sex differences are present in baroreflex sensitivity (BRS) and heart rate variability (HRV), which are key mechanisms that may contribute to the pathogenesis and clinical outcomes of hypertension. Herein, we tested the hypothesis that young AA men exhibit impaired cardiac autonomic function (spontaneous BRS and HRV) compared to AA women. We studied 26 young normotensive AA adults (13 women) [Age (men: 22 ± 3; and women: 19 ± 1yr; mean ± SD, p = 0.03); BMI (men: 24 ± 3; and women: 24 ± 2 kg/m2; p = 0.92)]. Heart rate (HR; ECG) and beat-to-beat blood pressure (BP; finger plethysmography) were continuously recorded during 10 min of rest to assess HRV and cardiac BRS. Resting HR (men, 61 ± 8; and women: 65 ± 9 bpm; p = 0.18), diastolic BP (men, 66 ± 6; and women: 65 ± 5 mmHg; p = 0.48) and respiratory rate (men, 17 ± 3; and women, 17 ± 3 bpm; p = 0.97) were similar between the groups. Mean BP and systolic BP were higher in AA men, though within the normotensive range for both groups [mean BP (men: 84 ± 5; and women: 76 ± 5 mmHg; p = 0.001); SBP (men: 119 ± 4; and women: 103 ± 7 mmHg; p &lt; 0.001)]. HRV [root mean square of successive differences between normal heartbeats (RMSSD); men, 113 ± 78; and women, 79 ± 43 ms; p = 0.18] and cardiac BRS (overall gain; men, 25 ± 13; and women, 28 ± 12 ms/mmHg; p = 0.66) were not different between groups. These results indicate that BRS and HRV, which are markers of cardiac autonomic regulation, do not differ based on sex among young normotensive African American individuals. Supported by: Kinesiology and Health Education UT Austin Start-up Account 19-2635-91; and TACSM 2023 Student Research Development Award. This is the full abstract presented at the American Physiology Summit 2024 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.

Abstract 1011: A comprehensive comparative analysis of African Americans’ early onset and late onset colorectal cancer: A 60 year study in underserved population serving hospital

Abstract Background: The incident of early onset of colorectal cancer (EOCRC) is increasing in adults including in African Americans (AA). Aim: To investigate differences between EOCRC compared to late onset colorectal cancer (LOCRC) in AA patients. Methods: We reviewed demography, pathology and colonoscopy records of patients seen at Howard University Hospital from 1959 to 2023. This retrospective cohort consists of 175 EOCRC cases (&amp;lt;45 years) and 2025 LOCRC cases (&amp;gt;45 years). The age-adjusted rates for EOCRC and LOCRC were calculated for the age categories &amp;lt;45 and above 45. Results: The cohort comprised predominantly AA individuals (&amp;gt;85%). Gender distribution showed slightly more females (1074, 53%) than males, with no significant difference observed between EOCRC and LOCRC groups (p=0.94). Initial symptoms at presentation were prevalent in both EOCRC (93.8%) and LOCRC (92.6%). Notably, EOCRC exhibited a higher incidence of abdominal pain (23.3% vs. 17.2%, p=0.05) and changes in bowel habits (24.4% vs. 14%, p=0.05) compared to LOCRC. However, other symptoms such as melena, hematochezia, weight loss, and anemia were less prevalent in EOCRC than in LOCRC. Additionally, comorbidities like hypertension (HTN), diabetes mellitus (DM), and inflammatory bowel disease (IBD) were less frequent in EOCRC compared to LOCRC. Family history of colon cancer in first-degree relatives was notably higher in EOCRC (15.5%) compared to LOCRC (3.2%, p=0.01). Pathology reports indicated a higher occurrence of neuroendocrine tumors in EOCRC (2.8%) than in LOCRC (1.4%). Complications such as gastrointestinal bleeding and abdominal CT abnormalities were more frequent in EOCRC. Location-wise, EOCRC was primarily observed in the left sigmoid and rectosigmoid regions (p=0.01). Metastasis to other organs was more prevalent in EOCRC than in LOCRC (p=0.04) suggesting more aggressive and advanced lesions. Surgical interventions were slightly more common in EOCRC (80.4%) than in LOCRC (79.1%). Type of polyps and stage distribution showed some variations between the two groups. Interestingly, the incidence of colorectal cancer showed fluctuations over the years, peaking between 1980 and 1989 before declining in recent years, probably as a result of colonoscopy popularization. Conclusion: CRC incidence is increasing among young AA who display highly advanced and more metastatic tumors in comparison with LOCRC. While current screening programs seems to have decreased CRC prevalence in individuals older than 45, special attention needs to be addressed to young AA adults as well, to counter the observed trend, as they have the highest incidence of CRC among young population groups by race/ethnicity. Detailed analysis of the molecular landscape of EOCRC AA tumors is needed to understand the differential pathways and mechanisms defining these early onset cancers. Citation Format: Suryanarayana Reddy Challa, Mrinalini Deverapalli, Nasrin Farjana, Lakshmi Gayathri Chirumamilla, Reza Oskrouchi, Swetha Mynedi, Mudasir Rashid, Karthikeyan Senthilvelan, Babak Shokrani, Rabia Zafar, Angesom Kibreab, Farshad Aduli, Adeyinka Laiyemo, Zaki Sharif, Hassan Brim, Hassan Ashktorab. A comprehensive comparative analysis of African Americans’ early onset and late onset colorectal cancer: A 60 year study in underserved population serving hospital [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 1011.

Patient-centered research in pediatric transplant: Engaging families and recipients

Pediatric liver transplant (LT) recipients navigate a lifelong journey that includes constant monitoring and challenges. Research priorities and questions in LT have traditionally been provider-driven. This project was a novel partnership between a learning health system dedicated to pediatric LT (Starzl Network for Excellence in Pediatric Transplantation) and a parent-led advocacy group (Transplant Families) that aimed to prepare families and providers for collaborative patient-centered outcomes research (PCOR). We developed 5 virtual modules to (1) teach participants about PCOR, and (2) elicit ideas for PCOR priorities and processes in pediatric LT. Parents and providers participated via self-guided online modules or focus groups. Participants included 240 patient partners and 133 pediatric LT providers from 16 centers over 2 years. We held 20 focus groups, including 5 to amplify underrepresented voices: young adults, Spanish speakers, and African Americans. Feedback was summarized to create a PCOR Roadmap, a guide for future PCOR in the Starzl Network, which was disseminated back to participants online and via webinars. Feedback from a diverse group of stakeholders allowed us to develop PCOR priorities and processes for the pediatric LT community. Our engagement strategies could be adapted by other transplant communities to facilitate patient and provider research partnerships.

Abstract HUP16: Exploring Differences in Stroke Type and Stroke Risk Factors Between Young African Americans and Ghanaian Stroke Women

Introduction: Recent reports demonstrate that stroke prevalence is expanding in young women, especially in diverse populations. Our goal was to compare the stroke type and stroke risk factors among patients with African Ancestral lineage, including African Americans (AA), West African (WA) descent from Ghana, a country in West Africa, and those without African Ancestral (WAA) lineage. Methods: Women aged 18- 45 from our institutional stroke databases and the Kumasi, Ghana Stroke Survivors Registry between January 2014 and November 2019 were included in this retrospective study. Non-parametric t-test and chi-square analysis was used for statistical analysis to identify significant differences between stroke type and stroke risk factors. Results: Among the 236 subjects, the median age was similar between groups (p-value 0.3940) [40 (IQR 35-43) Ghana, n= 91; 43 (IQR 34-43) in AA, n= 43, and 39 (IQR 31-43) WAA, n= 102). In the total population, 25% had an intracerebral hemorrhage, 56% had an ischemic stroke, and 19% had a subarachnoid hemorrhage. The proportion of patients with ischemic stroke was similar between groups (p-value 0.20). However, the frequency of subarachnoid hemorrhages was the lowest in the WA cohort (9%) in comparison to AA (33%) and those WAA lineage (22%), p-value 0.017. The incidence of intracerebral hemorrhage was lowest in those WAA lineage (15%) versus the AA cohort (33%) and the WA cohort (34%) p-value 0.0358. Prevalence of hypertension was highest in Ghanaians (87%) vs 60% AA, and 34% in those WAA lineage, p-value 0.0008. Patients from Ghana were less likely to smoke (1%) versus AA cohort (36%), and those WAA (31%) lineage, p-value 0.0001. Conclusion: Significant differences were found between stroke type and risk factors in young women with stroke (hypertension, DM, and smoking), race, and country of origin. These findings are important because behavioral interventions reducing smoking and controlling blood pressure are effective for the prevention of subarachnoid and intracerebral hemorrhage. Studying social and environmental influential factors between groups may identify points of intervention to reduce stroke in AA and West African young women.

Outreach for Young Adult African Americans with Risk Factors for Stroke.

Research suggests that younger adult African American people (age 18-35 years) have more than double the risk of having a stroke than White people. Stroke risk education is lacking for this cohort; there is a dearth of materials that are targeted and focused for young adult African Americans. There is also little research on developing and testing age and culturally appropriate health literate materials that may help this population better understand personal risk factors for stroke. The aim of this study was to understand factors to guide creating and disseminating plain language health messages about stroke risk awareness among young adult African Americans. African American participants age 18 years and older completed an online survey (N = 413). Descriptive statistics, one-way analysis of variance, and two-step cluster analyses were used to evaluate stroke risk awareness, perceived risk of stroke, message creation factors, and online health information seeking behavior. Open-ended survey items described modifiable and non-modifiable reasons for perceived risk of stroke. Participants reported differences on overall stroke risk factor awareness by perceived risk of stroke was significant (F[2, 409] = 4.91, p = .008) with the very low/low group (M = 1.66, p < .01), showing significantly lower overall stroke risk factor awareness compared to the moderate and high/very high groups. Both respondents who thought their stroke risk was very low/low and moderate/high/very high commented about family history (54.1% and 45.9%, respectively) as the reason and 88.2% of very low/low commented that they did not have risk factors for stroke because they were young. Cluster analysis indicated the Mostly Clear Preferences cluster was more likely to select mostly/very on positive, informational, and long-term messages and medical authority sources. The largest of three clusters reported medical sources as the highest rated source for both finding and trusting health information (47.2%, n = 195). Young adult African Americans have a scarce understanding of modifiable stroke risk factors; health education materials should focus on positive information messaging that shows a long-term result and is presented by a medical authority. We did not observe any age or sex differences among the data, which suggests different message modalities may not be needed. [HLRP: Health Literacy Research and Practice. 2024;8(1):e38-e46.].

Successful Physical Activity Maintainers: Strategies and Characteristics of Young African American Women

African American (AA) women have disproportionately high physical inactivity and obesity prevalence rates in comparison to their gender and racial counterparts. AA women experience unique barriers to leisure-time physical activity (LTPA); however, methods to overcome these barriers are less developed. Therefore, this study used semistructured interviews to explore strategies of young, active AA women that support LTPA maintenance and to identify their psychosocial and behavioral characteristics. The International Physical Activity Questionnaire-long was also administered to provide descriptors of participants’ LTPA. Ten women (age: M = 26.1, SD = 1.7 years) who met national guidelines for aerobic or muscle-strengthening LTPA at least 6 months (aerobic LTPA: M = 2,578.0, SD = 1,228.5 metabolic equivalent-minutes [MET-min]/week; muscle-strengthening physical activity: M = 4.0, SD = 1.9 days/week) completed the study. Four categories emerged from the interviews: (a) early-life contributors to LTPA participation, (b) characteristics of current LTPA, (c) initiating LTPA participation, and (d) maintaining LTPA participation. Findings revealed participants identified weightlifting as a preferred type of LTPA, identified various planning/preparation methods to overcome LTPA challenges, and relied on social media to initiate and maintain LTPA. This study identified several strategies used by young AA women to maintain regular LTPA and program preferences. These data are important in this understudied group as similar strategies may help inactive young AA women overcome LTPA challenges and promote long-term adherence. This could help prevent health and physical activity disparities in this population.

The Letters of John H. Crowder

In the midst of the American Civil War, sixteen-year-old John H. Crowder, a free person of color, penned a series of letters that offer insight into the experiences, hopes, obstacles, and discrimination faced by young African Americans during the nineteenth century. Serving in the Louisiana Native Guard, one of the Union’s pioneering regiments that welcomed people of color, Crowder writes to declare his youthful ambitions and his unwavering resilience against his often disapproving superior officers. Additionally, within these letters Crowder’s profound love for his mother and a female friend is revealed, along with his determination to secure a stable future for the women in his life. The preservation of Crowder’s letters, alongside the story of his mother's pursuit of a military pension after Crowder’s death, brings to light the oft-overlooked contributions and experiences of African Americans in the post-Antebellum South. In this “Spotlight on Juvenilia,” I delve into the story behind the preservation of Crowder’s letters, exploring the unique challenges and triumphs experienced by young African Americans, as well as their significant role in shaping the Civil War narrative. Moreover, I emphasize the importance of amplifying diverse historical perspectives, particularly those of youth and people of color. By shedding light on the interplay between personal agency and societal constraints for Crowder, this exploration underscores the significance of his community’s voices in reshaping historical discourses and highlights the far-reaching implications of their experiences during this pivotal period in history.

RACE AND SEX DIFFERENCES IN RELATIONS OF DIABETES BIOMARKERS WITH PHYSICAL FUNCTIONING BEFORE DIABETES ONSET

Abstract It remains unclear if declines in physical functioning linked to Type 2 diabetes (T2DM) occur even before T2DM onset. We examined the longitudinal associations of T2DM biomarkers with upper and lower extremity strength among adults without T2DM at baseline. Participants were 1,572 African American (AA) and White adults (M(SD) age at baseline = 47.3 (9.7) years, 55% female, 53% AA) from the Healthy Aging in Neighborhoods of Diversity across the Life Span (HANDLS) study, assessed on up to 3 time points between 2004-2017. Participants provided blood samples for measurement of fasting glucose and glycosylated hemoglobin (HbA1c), and completed dominant and nondominant handgrip strength assessment, and a chair stands task to assess upper and lower extremity strength, respectively. Linear mixed effects regression models estimating relations of HbA1c on age-related change and adjusting for race, sex, literacy, and poverty status revealed significant four-way interactions of HbA1c, race, sex, and age (B = -.2.59, t(2853) = -2.0 p = 0.04), and to a lesser extent of fasting glucose, race, sex, and age (B = -.07, t(2863) = -1.84 p = 0.06) on change in the chair stands task, but not on handgrip strength (ps &amp;gt; 0.29). Among younger AA and White men, and younger White women, increasing HbA1c was related to worse lower extremity strength. However, among AA women, and older White women, increasing HBA1c was related to better lower extremity strength. Our findings suggest differential relations of worse glucose regulation on physical functioning amongst African American and White men and women.

Acute inflammation elicits decreased blood pressure but similar arterial stiffness in young African American adults.

African Americans (AA) have a higher risk for cardiovascular disease (CVD) as compared to their White (W) counterparts. CVD is characterized by increased blood pressure (BP), arterial stiffness and systemic inflammation. An acute inflammatory stimulus may explain physiological manifestations responsible for amplified CVD in AA that are not apparent at rest. The purpose of this study was to evaluate central and peripheral BP, central and local arterial stiffness, and indices of pulse wave morphology in young healthy AA and W participants in response to acute inflammation. Concentrations of the inflammatory cytokine interleukin-6 (IL-6) and measures of central and peripheral BP, central arterial stiffness (carotid-femoral pulse wave velocity (cfPWV)), local carotid arterial stiffness (β-stiffness, elastic modulus (Ep)), and indices of pulse wave morphology were assessed in 28 participants (21±2years, AA: n = 11) at baseline (BL), 24h and 48h post-inflammation. Changes in IL-6 concentrations (ΔIL-6) were significantly greater at 24h as compared to 48h post-inflammation (0.652±0.644 vs. -0.146±0.532pg/μl, P≤0.0001). Among AA participants, central and peripheral diastolic BP were significantly decreased at 24h post-inflammation as compared to BL (aortic diastolic BP: -4±4mmHg, P=0.016; brachial diastolic BP: -4±4mmHg, P=0.014). AA participants also experienced a significant decrease in central and peripheral mean arterial BP at 48h post-inflammation as compared to BL (aortic mean arterial pressure: -4±4mmHg, P=0.009; brachial mean arterial pressure: -4±4mmHg, P=0.012). Despite haemodynamic changes, there were no differences in central or local carotid arterial stiffness or indices of pulse wave morphology.

Physical activity, sitting time, and thermal quantitative sensory testing responses in African Americans.

Prior research suggests that African Americans (AAs) have more frequent, intense, and debilitating pain and functional disability compared with non-Hispanic Whites (NHWs). Potential contributing factors to this disparity are physical activity and sedentary behavior, given that AAs are less physically active, and physical activity is associated with antinociception (whereas sedentary behavior is linked to pronociception). However, impact of these factors on pain processing has largely been unexplored in AAs, especially before chronic pain onset. This study examined relationships between physical activity, sedentary behavior (sitting time), and laboratory measures of pain and pain modulation in adult AAs. These included heat pain threshold and tolerance, temporal summation of pain (TSP, a marker of central sensitization), and conditioned pain modulation (CPM, a marker of descending pain inhibition). Multiple regressions were conducted to examine the effects of physical activity and sitting time on heat threshold and tolerance. Multilevel models were conducted to assess the relationship between physical activity, sitting time, and temporal summation of pain. Additional multilevel models were conducted to assess the relationship between physical activity, sitting time, and conditioned pain modulation. Higher level of physical activity, but not sitting time, was associated with reduced TSP slopes. Neither physical activity nor sitting time was associated with CPM slopes. No significant relationships between physical activity or sitting time and heat pain threshold or tolerance were detected. These findings suggest that physical activity is associated with reduced TSP, an effect which may be driven by reduced spinal hyperexcitability in more active individuals. Thus, structural and individual interventions designed to increase physical activity in healthy, young AAs may be able to promote antinociceptive processes (ie, reduced TSP/reduced pain facilitation) potentially protective against chronic pain.

The CD147 Epitope on SARS CoV2 and the Spike in Cancer, Autoimmunity and Organ Fibrosis

TNFα in partnership with glycosylated CD147 conspires to create the fertile soil for de novo and recurrent cancer. CD147 is present on the spike protein S (virus or vaccine) [1], despite claims to the contrary [2,3]. These claims have been discredited [4]. Pro and con arguments for the connection between cancer and Covid-19 or its vaccines continue to rage. But the physiologic implications involving TNFα and CD147 discussed in this article are worrisome. A deep dive into the tumor microenvironment (TME) created by the high mannose high glycosylation of CD147 is undertaken. Angiotensin II type 1 receptor antibodies and TNFα generated by the virus and/or the vaccine are biomarkers for future LC. Their presence in POTS is 70%. These activate AT1Rs and ADAM17 aka TACE, the enzyme that produces TNFα. This cytokine inhibits mannosidase and leads to the high mannose glycosylation of CD147, TNFα, IL-6, and TGF beta or their receptors, which appears to redirect their pleiotropic functions. High mannose glycosylation of CD147 drives the production of IL-17 and IFN gamma closely linked to autoimmune disease. TGF beta is linked to organ fibrosis. The TME created by these redirected cytokines spawns epithelial mesenchymal transition (EMT), cancer associated fibrosis (CAF), tumorigenesis, and metastasis. TNFα is associated with aggressive forms of colon cancer and Triple negative breast cancer (TNBC) and levels are elevated when vitamin D and magnesium are deficient. TNBC (15% of breast cancers, but the most aggressive form) is especially prominent in the obese and in young (less than 40) African American and Hispanic women. Specific recommendations for prevention and therapy include D-mannose.

A call for standardized reporting of early-onset colorectal peritoneal metastases.

The incidence of colorectal cancer (CRC) in patients under 50 years of age, i.e., early-onset CRC, has increased in the past two decades. Colorectal peritoneal metastases (CPM) will develop in 10-30% of CRC patients. CPM traditionally had a dismal prognosis, but surgery and novel systemic treatments appear to increase survival. Determining potential age-associated risk and prognostic factors is optimized when analyses use standardized age groupings. We performed a review of early-onset CPM studies and compared variables used, e.g., age stratification and definitions of synchronous and metachronous CPM. We included studies published in PubMed up to November 2022 if results were stratified by age. Of 114 screened publications in English, only 10 retrospective studies met inclusion criteria. Incidence of CPM was higher in younger CRC patients (e.g. 23% vs. 2% for <25 vs. ≥25 years, P < 0.0001; and 57% vs. 39% vs. 4% for <20 vs. 20-25 vs. >25 years, P < 0.001); two studies reported higher proportion of younger African American CPM patients (e.g. 16% vs. 6% for <50 vs. ≥50 years). Studies used seven different age-stratification methods, presenting comparison challenges. Studies showed a higher proportion of CPM in younger patients, but directly comparing results was not possible due to inconsistent reporting. To better address this issue, CRC and CPM studies stratified by standard age groups (e.g. <50 vs. ≥50) are needed.

0338 A Naturalistic within and between Subjects Comparison of the effects of Cannabis on Sleep among Young Adult, African Americans

Abstract Introduction Cannabis use is increasing, despite limited knowledge of its potential benefits and adverse effects. Reducing sleep disturbance appears to be a frequent motivation for nighttime cannabis use yet its effects on sleep are poorly documented. We leveraged data from an observational study of urban residing young adult African Americans where pre-bedtime cannabis use was variably endorsed with digital ecological momentary assessment (EMA) to conduct within and between subjects’ comparisons of sleep with and without preceding cannabis use. Methods Participant were recruited from an ongoing observational study that enrolls African Americans living in urban environments. 20 participants endorsed cannabis use on some but not all nights and were included in the within subjects’ comparison. 25 participants who used cannabis on 2 or more nights were compared with 28 participants who did not endorse prebedtime substance use. Total sleep time (TST), and wake after sleep onset WASO were derived from actigraphy monitoring; sleep quality (SQ) (scale: 1 “not at all rested”-10 “very rested”) and time in bed (TIB) were obtained from the EMA. Results While TST and WASO were very similar in both conditions and groups, within subjects’ SQ was superior on nights without cannabis (7.2 + 1.7 vs. 6.4 + 2.2, t=2.2, p=.04) and cannabis users spent more time in bed (minutes) than their non-cannabis using counterparts (447.6 + 77.1 vs. 373.6 + 66.1; t= 2.4, p=.04). Conclusion Among urban residing young African American adults, cannabis does not appear to improve sleep. Support (if any) This research was supported by the NIHLB grant R01HL136626 to Dr. Thomas A. Mellman.

0848 Total sleep time, wake after sleep onset, and inflammation predict obesity in young adult African Americans

Abstract Introduction Sleep is vital to maintaining psychological and physiological health. Poor sleep is associated with adverse health outcomes, including obesity. Studies have shown that African Americans disproportionately suffer from poor sleep and the adverse health outcome associated with obesity. We aimed to determine if sleep quality and peripheral inflammation are significant predictors of obesity in a young adult African American sample. Methods Participants were healthy adults with a body mass index of less than 40 between 18- 35 who self-identified as Black or African American and completed a protocol consisting of in-lab polysomnography, ambulatory monitoring and a morning blood draw. Height and weight were collected to derive body mass index (BMI). Total sleep time (TST), wake after sleep onset (WASO), sleep onset latency (SOL), and sleep efficiency (SE) were derived from in-home actigraphy. Venipuncture was used to collect blood samples within 15 minutes of awakening. Once samples were processed, interleukin-6 (IL-6) levels were detected and quantified using enzyme-linked immunosorbent assays (ELISA). Results Significant correlations were found between BMI, WASO, TST, SE, and IL-6. A forward stepwise linear regression was used to identify possible predictors of BMI out of the following candidate variables: TST, SE, WASO, and IL-6. At each step, variables were chosen according to their contribution to the model's R^2. The p-value threshold of 0.05 was used to set a limit on the total number of variables included in the final model. TST, WASO, and IL6 were the significant predictors in the final model that accounted for 26% of the variance in BMI (∆R2 = .260, p&amp;lt;.001). Regression coefficients suggest that IL-6 (β =.388), TST (β= -.234), and WASO (β=.205) predict obesity. Conclusion Total sleep time and wake after sleep onset are modifiable protective and risk factors that appear to be significant contributors to obesity in urban-residing young African Americans. Support (if any) This research was supported by the NIHLB grants R01HL087995 and R01HL136626 and to Dr. Thomas A. Mellman and NCATS grant for a Clinical Translational Science Award UL1-TR001409.

Forearm vascular conductance responses to rhythmic handgrip in young African American compared with Caucasian American women

Non-Hispanic African American (AA) individuals have a disproportionately high prevalence, and mortality rate of cardiovascular disease (CVD) compared to other populations. Previous studies have demonstrated that even young, healthy AA individuals have blunted flow-mediated dilation, attenuated vasodilatory responses to pharmacological infusions and rhythmic handgrip exercise (RHG), as well as higher arterial stiffness and exaggerated peripheral vasoconstriction to isometric handgrip exercise and other non-exercise-stimuli compared to Caucasian-American (CA) individuals. These studies indicate that vascular alterations occur early on in life of AA individuals, potentially contributing to elevated risk of CVD in this racial group. However, these racial disparities in vascular function have almost exclusively been studied in men. Herein, we tested the hypothesis that, similar to young AA men, young AA women will exhibit an attenuated increase in forearm blood flow (FBF) and forearm vascular conductance (FVC) during rhythmic handgrip exercise (RHG) compared to age-matched CA women. Forearm blood flow (FBF; duplex Doppler ultrasound) and mean arterial pressure (MAP; finger photoplethysmography) were measured in young CA (n = 5) and AA (n = 5) women during rhythmic handgrip exercise performed at three workloads (15%, 30%, and 45% of maximal voluntary contraction (MVC)). FVC was calculated as FBF/MAP. Baseline FBF (CA: 66.0 ± 12.8 and AA: 61.6 ± 12.2 ml/min; mean ± SD, p = 0.30); FVC (CA: 0.8 ± 0.2 and AA: 0.7 ± 0.2 ml/min/mmHg; p = 0.16), MAP (CA: 82 ± 11 and AA: 88 ± 4 mmHg; p = 0.28), and MVCs (CA: 50 ± 4 and AA: 52 ± 5 kg; p = 0.35) were similar between the groups. Both groups exhibited intensity-dependent increases in FBF and FVC; however, contrary to our hypothesis, there were no race difference (mixed-model two-way ANOVA; FVC: race effect p = 0.18, intensity effect p &lt; 0.0001, interaction p = 0.48). For instance, in response to RHG at 45%, CA had 384 ± 112% increase in FBF from baseline and AA had 499 ± 153% increase. Increase in FVC from baseline was 198 ± 76% for CA women and 314 ± 151% for AA women. MAP did not differ between the groups (e.g., ΔMAP at 45%; CA: 13 ± 11 vs AA: 9 ± 5, p = 0.41). These preliminary data suggest that the hyperemic response to rhythmic handgrip exercise in young African American women are similar to age-matched Caucasian-American women. Supported byKinesiology and Health Education UT Austin Start-up Account 19-2635-91. This is the full abstract presented at the American Physiology Summit 2023 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.

Strategies for Recruiting Young African American Men for Primary Stroke Prevention Research.

African American (AA) men bear a disproportionate burden of cardiovascular disease and stroke but are often underrepresented in research. This article describes the development and evaluation of a recruitment plan to reach young AA men for the Stroke Counseling for Risk Reduction in Men project. The plan was developed from researchers' previous experiences and a literature review, and used to recruit AA men, ages 20 to 35 years, for focus groups about stroke and Stroke Counseling for Risk Reduction. Screening survey respondents (N = 81) were reached mostly by word of mouth (42%) and social media (28%). Focus group participants (N = 32) recommended appropriate incentives and social media to recruit young AA men for research. They also suggested learning about the study from a friend, colleague, or study participant could motivate participation. The plan was successful in reaching and enrolling an adequate sample. Findings and recommendations highlight the importance of social networks and trusted sources.