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Hispanic Health Study Links Liver Markers to Cardiovascular Risk

New analysis reveals potential early indicators for heart disease and mortality.

Researchers have identified specific liver enzyme levels and fibrosis scores that may signal a heightened risk for cardiovascular disease (CVD) and death among Hispanic and Latino adults. This investigation delves into data from a large-scale health study, offering crucial insights into preventative health strategies.

Study Foundation: The HCHS/SOL Cohort

The Hispanic Community Health Study/Study of Latinos (HCHS/SOL) tracked over 16,000 US Hispanic and Latino adults from diverse backgrounds. Participants, aged 18 to 74, were enrolled between 2008 and 2011 across four major US cities.

The study meticulously defined prevalent cardiovascular disease at its outset. This included individuals showing specific electrocardiogram (ECG) abnormalities indicative of past heart attacks. It also incorporated self-reported medical histories of myocardial infarction, stroke, heart failure, or procedures like angioplasty, stenting, or bypass surgery. After excluding 1,199 participants with existing CVD, a final cohort of 15,216 individuals was analyzed.

The HCHS/SOL study meticulously mapped participant journeys, defining cardiovascular disease (CVD) status at baseline to refine the analysis of its long-term outcomes.

Tracking Health Outcomes

The study’s primary outcome combined new CVD events with all-cause mortality. This was tracked through annual phone interviews and verified via medical records and death certificates. The rigorous process involved expert committee reviews to confirm cardiovascular events, ensuring data accuracy.

All-cause mortality was also confirmed through various channels, including family interviews and vital statistics matching. Participants were followed until December 31, 2017, documenting the occurrence of death, a first CVD event, or the final completed follow-up contact.

Investigating Liver Health Markers

Key variables examined included physical activity assessed by the Global Physical Activity Questionnaire (GPAQ), dietary intake evaluated through the National Cancer Institute method, and body composition metrics like BMI and waist circumference. Blood tests measured glucose, insulin, lipid profiles, and inflammatory markers.

The research focused on liver enzymes like ALT, AST, and GGT, along with the FIB-4 index, a common tool for estimating liver fibrosis. Metabolic dysfunction-associated steatotic liver disease (MASLD) was also assessed, defined by the presence of fatty liver (indicated by the Fatty Liver Index) and at least one metabolic risk factor.

The Fatty Liver Index (FLI) was calculated using a specific formula incorporating BMI, waist circumference, and triglyceride levels, with scores above 60 indicating potential steatosis.

$$ begin{aligned} text{FLI} = & (e^{0.953 times text{log}(TG)} + 0.718 times text{log}(BMI) + 0.718 times text{AST} times text{log}(GGT) + 0.054 times text{Waist Circumference} + 15.745) \ & / (1 + e^{0.953 times text{log}(TG)} + 0.718 times text{log}(BMI) + 0.718 times text{AST} times text{log}(GGT) + 0.054 times text{Waist Circumference}) times 100 end{aligned} $$

Metabolic risk factors included conditions such as diabetes, obesity (BMI > 25), increased waist circumference, hypertension, low HDL cholesterol, high triglycerides, prediabetes, insulin resistance (HOMA-IR ≥ 2.5), and elevated C-reactive protein (hs-CRP).

Statistical Insights and Associations

Statistical analyses employed Cox proportional hazards models to evaluate the link between elevated liver markers (AST/ALT, FIB-4, MASLD) and the risk of CVD or mortality. Models were adjusted for various factors including age, sex, ethnicity, lifestyle behaviors, and metabolic health status.

The study found that higher levels of liver enzymes and fibrosis scores were independently associated with an increased risk of developing cardiovascular disease and all-cause mortality. A recent report from the American Heart Association indicates that nearly half of all adults in the US have some form of cardiovascular disease, highlighting the importance of identifying risk factors.American Heart Association Statistics

These findings suggest that monitoring liver health could play a vital role in cardiovascular risk assessment, particularly within the Hispanic and Latino communities. Further research may elucidate the precise mechanisms linking liver health to systemic cardiovascular outcomes.

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Here’s a breakdown of the provided text, focusing on its key points and structure:

Main Topic: The text discusses the prognostic value of the ALBI score in intensive care unit (ICU) patients with cirrhosis and sepsis.

Key Findings/Arguments:

Diabetes and Sepsis Interaction: The text highlights how diabetes can worsen sepsis outcomes by:
Inducing inflammasome activation and increasing proinflammatory cytokines.
Causing immune dysfunction (impaired neutrophil chemotaxis, macrophage phagocytosis).
These effects can amplify the existing immune impairment in cirrhosis, leading to worse clinical outcomes.
ALBI Score Robustness: the study’s findings regarding the ALBI score’s association with worse outcomes were validated through sensitivity analyses using a median-based dichotomization.
ALBI Score Utility: The ALBI score is presented as a “simple, objective, and effective tool for early risk stratification” in this patient population.

Limitations of the Study:

Retrospective Design & Single Center: This limits the generalizability of the findings to other settings or populations.
Exclusion of Short ICU Stays: patients with ICU stays less than 24 hours were excluded, potentially underestimating early mortality risk.
Static ALBI Score: ALBI scores were calculated based on initial lab values, not accounting for dynamic changes in liver function during the ICU stay.
Incomplete Organ Dysfunction Assessment: The neurological component of organ dysfunction (Glasgow Coma Scale) could not be fully included due to data limitations in the MIMIC-IV database, potentially leading to incomplete adjustment for overall disease severity.

Future Directions/Recommendations:

External Validation: Prospective and multicenter studies are needed to confirm the findings.
Broader Data Sources: Analyses using other public critical care databases (e.g., eICU, hirid) are recommended.* Integration into Workflows: Further exploration of integrating the ALBI score into ICU workflows and dynamic risk models is warranted.

Overall Structure:

The text appears to be part of the discussion section of a research paper. It starts by elaborating on a specific aspect of the findings (diabetes and sepsis interaction), then discusses the validation of their main findings (ALBI score), followed by a detailed enumeration of the study’s limitations, and concludes with recommendations for future research and clinical request.

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Liver Cells May Hold Key to Blocking Cancer Spread

New Research Reveals Unexpected Role in Metastasis

A surprising discovery from the University of the Basque Country suggests that cells normally dedicated to liver repair can inadvertently fuel the growth of metastatic tumors, offering a potential new target for cancer therapies.

Unexpected Turn for Healing Cells

Researchers have long known that hepatic stellate cells (HSCs) play a crucial role in liver healing, creating scar tissue to protect against damage from conditions like fibrosis and fatty liver disease. However, a study published in Hepatology Communications reveals a darker side to these cells: they actively promote the development of cancer that has spread to the liver.

As Aitor Benedicto, a researcher specializing in the tumor microenvironment at the University of the Basque Country, explained, when metastatic cells reach the liver, the stellate cells are activated and proliferate; besides secreting collagen, they contribute to the formation of new blood vessels and, as a result of various factors that hamper the body’s defences, contribute to the development of tumor cells.

The team’s experiments on mice demonstrated that eliminating these activated stellate cells dramatically reduced metastasis. This improvement was linked to decreased collagen buildup, blocked blood vessel formation, and a strengthened immune response within the liver, effectively removing a critical support system for the tumor.

Multiple Cancers Affected

Liver metastasis is a common and often deadly complication of several primary cancers, including colon, pancreatic, breast, and melanoma. According to the American Cancer Society, approximately 5% of adults in the United States will be diagnosed with cancer of the colon or rectum in their lifetime (American Cancer Society, 2024). Benedicto and his colleagues are investigating whether the effect observed with stellate cells is consistent across different cancer types.

“We already know that these cells have the ability to promote the development of metastasis. Now,”

Aitor Benedicto, Researcher

Initial studies with colon cancer and melanoma have shown a similar response, suggesting the liver’s reaction—or the stellate cells themselves—respond in the same way regardless of the originating cancer. The researchers are now focusing on pancreatic cancer to confirm these findings.

Unlocking New Treatment Strategies

The research team is now analyzing the specific proteins expressed by stellate cells and surrounding tissues when metastasis develops. By identifying these changes, they hope to pinpoint potential targets for new therapies designed to disrupt the tumor’s support network. Benedicto stated, We eliminated the support that the metastatic tumor had.

Benedicto expressed optimism about the potential for future breakthroughs, noting, We’ve got some nice results. Although there is still a long way to go, the results achieved are hugely significant. We are closer to a cure than ever. He also highlighted the existing research aimed at deactivating stellate cells in the context of liver diseases, suggesting a possible synergy between these efforts and the new findings.

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