Daily Archives: 22 July 2024

Global Study Reveals Biodiversity Impacts of 151 Dishes: Meat, Legumes, and Rice-based Meals Linked to Higher Footprints

A recent study of significant importance was published on February 21, 2024, in the open-access journal PLOS ONE by Elissa Cheng of the National University of Singapore and her colleagues. This study, which analysed 151 popular global dishes sourced from lists on CNN.com and TasteAtlas.com, each standardised to 825 calories, reveals that certain dishes profoundly impact biodiversity. The study’s focus on the biodiversity footprint—measuring the effects on wildlife species richness, conservation status, and habitat provides crucial insights for our understanding of the issue.

According to the findings, dishes that include Brazilian steak and Indian kidney bean curry exhibit exceptionally high biodiversity footprints. This study extends previous research which mapped the encroachment of agriculture on wildlife habitats, specifically those of birds, mammals, and amphibians. By assessing the ingredients of various dishes, the research team calculated the biodiversity footprint of each ingredient based on the agricultural land used, considering factors like species richness and conservation status in those areas.

The methodology involved aggregating the footprints of individual ingredients to produce an overall score for each dish, with variations noted depending on the source (local or global) and the farming method (industrial or small-scale). The results highlighted a trend where dishes predominantly featuring beef, chicken, legumes, and rice had the largest footprints. Among the top twenty dishes with the highest impact were several Brazilian beef dishes (picanha, churrasco, fraldinha), alongside other meat-based recipes and, notably, several vegan options such as dal, rajma, chana masala, and idli. These findings illustrate that meat-based dishes and vegetarian options from regions like the Indian subcontinent, where rice and legumes are predominantly grown industrially, have significant biodiversity impacts.

Conversely, dishes with the most minor biodiversity impacts were mainly vegetarian or vegan, starchy, and based on grains or potatoes, such as pommes frites, kartoffelpuffer, and baguettes. These findings underscore the crucial role of specific ingredients and their sources in biodiversity conservation, pointing out that consumers’ choices can significantly influence species conservation and ecosystem health.

The study also highlights certain limitations, such as not differentiating between wildlife that can adapt to cultivated environments and those that need undisturbed habitats, focusing only on mammals, birds, and amphibians. Moreover, the selection of dishes primarily from high-GDP countries might need to be more representative of global cuisine. However, the research stresses the importance of selecting ingredients conscientiously, especially those sourced from biodiversity hotspots or areas under significant human pressure. The authors advocate for small dietary changes, which could substantially help in averting species extinctions and preserving biodiversity. This emphasis on the potential for change through individual actions should inspire hope and empowerment in the audience.

More information: Elissa M. Y. Cheng et al, Biodiversity footprints of 151 popular dishes from around the world, PLoS ONE. DOI: 10.1371/journal.pone.0296492

Journal information: PLoS ONE Provided by PLOS

New Study Finds Over 25% of ‘Healthy’ Individuals Over 60 Suffer from Heart Valve Disease

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The extensive presence of undiagnosed heart valve disease in our ageing population has come to light through pioneering research spearheaded by the University of East Anglia. The study reveals that more than 25% of asymptomatic individuals over the age of 60 were found to harbour undiagnosed heart valve disease.

Vassilios Vassiliou, the co-lead author and Clinical Professor of Cardiac Medicine at UEA’s Norwich Medical School, remarked that the research aimed to gauge the prevalence of varying severity of heart valve complications among healthy, symptom-free adults with no history of heart conditions. Nearly 4,500 participants aged 60 and above from Norfolk, West Midlands, and Aberdeen were assessed using echocardiography, a type of heart ultrasound. The results indicated that upwards of 28% of these individuals had some form of heart valve disease. Thankfully, the majority of these cases were mild.

The study underscored age as a primary factor linked to heart valve issues, illustrating that the likelihood of significant valve problems escalates. Heart valves play a crucial role in cardiovascular health, acting like gates that govern blood flow in one direction through the heart, much like a one-way traffic system. The four valves—the pulmonary and tricuspid on the right side and the aortic and mitral on the left side of the heart—ensure that blood is pumped efficiently.

Professor Michael Frenneaux, co-lead author and a prominent figure at the Royal Brompton Hospital, part of Guy’s and St Thomas’ NHS Foundation Trust and Imperial College London, explained that heart valve disease occurs when these valves fail to function correctly. The principal issues include valve stenosis, which doesn’t open fully, hindering blood flow, and valve regurgitation, which doesn’t close completely, allowing blood to leak backwards. These conditions can significantly strain the heart and elevate the risk of serious cardiac events like heart attacks and strokes.

Symptoms of heart valve disease can range from breathlessness, chest pain, and palpitations to fatigue, dizziness, and swelling of the ankles and feet. From 2007 to 2016, over 10,000 asymptomatic patients above 60 were invited to participate in this British Heart Foundation-funded study, with 5,429 volunteering and 4,237 being eligible for inclusion. Participants underwent health questionnaires, clinical examinations, and transthoracic echocardiography. The prevalence of heart valve disease was diagnosed at 28.2%, though only 2.4% had clinically significant valvular disease, with moderate or severe cases more frequent in those aged 75 and older.

Prof. Vassiliou highlighted the challenges in diagnosing heart valve disease, which is often only performed after detecting symptoms or an unusual heart murmur during physical exams. This is particularly tricky in older adults, where mild symptoms might be obscured by reduced physical activity and mobility issues.

The study underscores the latent prevalence of heart valve issues in older adults, even without symptoms. It suggests the importance of discussing new symptoms that might indicate heart disease with a healthcare provider. As the population ages, these insights will be crucial for healthcare providers to understand the extent of valve disease and optimize routine care and screening programs to meet future demands. This proactive approach aims to identify and assist those at risk before their conditions worsen.

Further research is essential to determine the exact prevalence of this condition in the elderly and to explore how screening might be employed to detect and manage the disease effectively. James Leiper, Associate Medical Director at the British Heart Foundation, emphasized the importance of this research in uncovering heart valve conditions in a large group of asymptomatic individuals. He noted that while significant progress has been made, ongoing research is vital to continue developing methods for disease identification and ultimately to reduce the burden of heart disease.

More information: Vasiliki Tsampasian et al, Prevalence of asymptomatic valvular heart disease in the elderly population: a community-based echocardiographic study, European Heart Journal – Cardiovascular Imaging. DOI: 10.1093/ehjci/jeae127

Journal information: European Heart Journal – Cardiovascular Imaging Provided by University of East Anglia

Decoding Patterns of Illness in Elderly Initiating Long-Term Care in Japan and Their Prospective Health Results

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With the ageing population on the rise, the need to improve the quality and efficiency of healthcare for older adults has never been more pressing. This demographic is incredibly diverse, often dealing with a multitude of diseases. Designing effective intervention strategies for such a varied group is a significant challenge. To address this, researchers utilised unsupervised machine learning techniques to categorise individuals aged 65 and older who had recently entered long-term care. The study, conducted in Tsukuba City, Ibaraki Prefecture, and Sammu City, Chiba Prefecture, focused on the relationship between these classifications (referred to as ‘clinical subtypes’) and their subsequent health outcomes.

Six clinical subtypes were identified in Tsukuba City: i. musculoskeletal and sensory disorders, ii. cardiac disorders, iii. neurological disorders, iv. respiratory disorders and cancers, v. Insulin-dependent diabetes, and vi. other conditions. This classification system was similarly validated when the data from Sammu City were analysed.

Regarding health outcomes, individuals with cardiac diseases, respiratory diseases/cancers, and insulin-dependent diabetes showed a higher risk of mortality compared to those with musculoskeletal and sensory disorders. Additionally, those with cardiac diseases, respiratory diseases/cancers, and other conditions experienced an increase in the severity of care needs.

The implications of this research extend beyond the individuals in need of care to their families and the healthcare staff involved. By developing targeted interventions for each identified clinical subtype, this research could significantly influence healthcare policies and practices, leading to more effective and personalised care for older adults in long-term care.

More information: Yuji Ito et al, Clinical subtypes of older adults starting long-term care in Japan and their association with prognoses: a data-driven cluster analysis, Scientific Reports. DOI: 10.1038/s41598-024-65699-6

Journal information: Scientific Reports Provided by University of Tsukuba

Unlocking the Secret to Healthier Potato Crisps

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In a landmark development for the snack food industry, a research team led by Professors Jiming Jiang and David Douches from Michigan State University has uncovered a critical mechanism contributing to the darkening and associated health risks of cold-stored potatoes. Published on February 20 in ‘The Plant Cell’ journal, their findings pave the way for breeding new potato varieties stored at low temperatures without compromising health or taste, transforming the potential for healthier and more appealing crisps and fries. This breakthrough holds immense value, especially in Michigan, the nation’s leader in producing chipping potatoes, where the industry boasts an annual valuation of $240 million.

Potato crops are seasonal, yet snack manufacturers’ demand for fresh potatoes is constant. Cold storage of potatoes helps maintain an uninterrupted supply, but it also initiates cold-induced sweetening (CIS), where starches convert into sugars. This not only causes the potatoes to darken when cooked but also leads to the formation of acrylamide, a carcinogenic compound produced during high-temperature processing. This substance has been linked with several health issues, including an increased risk of cancer. Existing methods to reduce sugars in stored potatoes can be costly and potentially alter the end product’s taste.

To address this challenge, Jiang and his team have concentrated on eliminating the root cause of CIS, aiming to develop potato varieties that are naturally resistant to this condition. “We have identified the specific gene responsible for CIS and, crucially, the regulatory element that activates it under cold conditions,” explained Jiang, a professor in the Plant Biology and Horticulture department at MSU. Understanding the activation and deactivation of this gene opens up possibilities for creating potatoes that do not produce harmful compounds.

Jiang’s commitment to this research spans over two decades. He began his quest to minimize acrylamide in snacks at the University of Wisconsin-Madison. After identifying an essential gene linked to CIS in 2010, he moved to MSU in 2017 to further this research. His team has utilized gene expression analysis, protein identification, and enhancer mapping to identify the regulatory element controlling the CIS gene. This meticulous research has been supported by MSU’s collaborative environment and facilities, including the renowned potato breeding program led by Douches.

Douches, the head of the MSU Potato Breeding and Genetics Program, has applied Jiang’s gene-editing techniques to halt CIS, reinforcing the collaborative success of their research efforts. “Our campus facilities allow for efficient research, and our findings are paving the way for targeted genetic modifications to create cold-resistant potato varieties,” said Douches. These advancements improve snack food quality and reduce acrylamide formation in other processed starchy foods, enhance potato storage and transportation flexibility, and potentially reduce food waste and costs.

Jiang is optimistic about the commercial availability of CIS-resistant potatoes in the near future, highlighting the profound implications of their research on global food quality and health. “This discovery represents a significant advancement in our understanding of potato development and its implications for food quality and health,” he said. “It has the potential to affect every single bag of potato chips around the world.” This pioneering work could revolutionize the potato industry, offering safer and tastier options for consumers worldwide, and inspiring further research and innovation in the field.

More information: Xiaobiao Zhu et al, Molecular dissection of an intronic enhancer governing cold-induced expression of the vacuolar invertase gene in potato, The Plant Cell. DOI: 10.1093/plcell/koae050

Journal information: The Plant Cell Provided by Michigan State University