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Studies show no safe air quality threshold exists for heart & lung health

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New York, Feb 22 (IANS) Short and long term exposure to fine particulate matter (PM2.5) air pollution is linked to an increased risk of hospital admission for major heart and lung diseases, find two large US studies, published by The BMJ on Thursday.

Together, the results suggest that no safe threshold exists for heart and lung health, said the team of researchers from Harvard T.H Chan School of Medicine, US.

According to the Global Burden of Disease study, exposure to PM2.5 accounts for an estimated 7.6 per cent of total global mortality and 4.2 per cent of global disability adjusted life years (a measure of years lived in good health).

In light of this extensive evidence, the World Health Organization (WHO) updated the air quality guidelines in 2021, recommending that an annual average PM2.5 levels should not exceed 5 microgram per cubic metre and 24 hour average PM2.5 levels should not exceed 15 microgram per cubic metre on more than 3-4 days each year.

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In the first study, researchers linked average daily PM2.5 levels to residential zip codes for nearly 60 million US adults (84 per cent white, 55 per cent women) aged 65 and over from 2000 to 2016.

They then used Medicare insurance data to track hospital admissions over an average of eight years.

After accounting for a range of economic, health and social factors, average PM2.5 exposure over three years was associated with increased risks of first hospital admissions for seven major types of cardiovascular disease — ischemic heart disease, cerebrovascular disease, heart failure, cardiomyopathy, arrhythmia, valvular heart disease, and thoracic and abdominal aortic aneurysms.

Compared with exposures of 5 microgram per cubic metre or less (the WHO air quality guideline for annual PM2.5), exposures between 9 and 10 microgram per cubic metre, which encompassed the US national average of 9.7 microgram per cubic metre during the study period, were associated with a 29 per cent increased risk of hospital admission for cardiovascular disease.

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On an absolute scale, the risk of hospital admission for cardiovascular disease increased from 2.59 per cent with exposures of 5 microgram per cubic metre or less to 3.35 per cent at exposures between 9 and 10 microgram per cubic metre.

“This means that if we were able to manage to reduce annual PM2.5 below 5 microgram per cubic metre, we could avoid 23 per cent in hospital admissions for cardiovascular disease,” said the researchers from the Havard University in the US.

These cardiovascular effects persisted for at least three years after exposure to PM2.5, and susceptibility varied by age, education, access to healthcare services, and area deprivation level.

The researchers said their findings suggest that no safe threshold exists for the chronic effect of PM2.5 on overall cardiovascular health, and that substantial benefits could be attained through adherence to the WHO air quality guideline

In the second study, researchers used county-level daily PM2.5 concentrations and medical claims data to track hospital admissions and emergency department visits for natural causes, cardiovascular disease, and respiratory disease for 50 million US adults aged 18 and over from 2010 to 2016.

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During the study period, more than 10 million hospital admissions and 24 million emergency department visits were recorded.

They found that short term exposure to PM2.5, even at concentrations below the new WHO air quality guideline limit, was statistically significantly associated with higher rates of hospital admissions for natural causes, cardiovascular disease and respiratory disease, as well as emergency department visits for respiratory disease.

–IANS

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PM Modi hails Sudha Murty's maiden Rajya Sabha speech on women’s health

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New Delhi, July 3 (IANS) Prime Minister Narendra Modi on Wednesday commended author and philanthropist Sudha Murty — newly elected to the Rajya Sabha — for her impactful maiden speech during the discussion on motion of thanks to the President’s Address in the Upper House of the Parliament.

Speaking about women’s health, she cited her father’s poignant remark – when a mother dies it is counted as one death in the hospital, but for the family, a mother is lost forever.

PM Modi expressed gratitude to Sudha Murty for her comprehensive discussion on women’s health, acknowledging her as she stood up and greeted him.

“I want to thank Sudha Murty for speaking in detail about women’s health,” PM Modi said.

While discussing Sudha Murty’s emotional remarks about mothers, the Prime Minister emphasised that over the past decade, his government has prioritised women’s health and sanitation as a crucial sector.

“Our country’s women have benefited from the toilets we have made,” PM Modi said while replying to a debate on a motion thanking President Droupadi Murmu for her address to the joint sitting of Parliament last week.

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PM Modi also highlighted that his government has distributed sanitary pads and launched a vaccination program for pregnant women.

Sudha Murty advocated for a government-backed vaccination programme aimed at combatting cervical cancer.

“There is a vaccination which is given to girls, between the age of nine and 14, known as a cervical vaccination. If the girls take that, it (cancer) can be avoided… we should promote vaccination for the benefit of our girls because prevention is better than cure,” she said in her first speech in Rajya Sabha.

She suggested that since the government successfully managed a significant vaccination drive during Covid-19, providing cervical vaccination to girls aged 9-14 years should not be very challenging.

Sudha Murty, nominated to the Upper House of the Parliament by President Droupadi Murmu on the eve of International Women’s Day, noted that the cervical vaccination, developed in the West, has been in use for the past 20 years.

“It worked very well. It is not expensive. Today, it is Rs 1,400 for people like me who are in the field. If the government intervenes and negotiates… you can bring it to Rs 700-800. We have such a large population. It will be beneficial for our girls in the future,” she said during her 13-minute address.

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–IANS

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India backs global standards for spices, vegetable oils at international food trade meet

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New Delhi, July 3 (IANS) India has backed global standards for spices and vegetable oils at the 86th session of the Executive Committee (CCEXEC) of the Codex Alimentarius Commission (CAC), the Ministry of Health and Family Welfare (MoHFW) said on Wednesday.

The CCEXEC, ongoing at Food and Agriculture Organization (FAO) headquarters in Rome from July 1-5, plays a critical role in reviewing proposals for new work and monitoring the progress of standards development.

The CAC, an international body established by the FAO and the World Health Organisation (WHO), aims to protect consumer health and promote fair practices in food trade.

During the session, India, represented by G. Kamala Vardhana Rao, CEO of the Food Safety and Standards Authority of India (FSSAI), strongly supported the advancement of standards development for various spices, including small cardamom, turmeric, and vanilla, the ministry said.

“This initiative is particularly significant for India, being a major producer and exporter of these spices, as it would facilitate smoother international trade,” it added.

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India also “backed the progression of standards for named vegetable oils, guidelines for the control of Shiga toxin-producing Escherichia coli”.

It also called for the safe use and reuse of water in food production and processing and championed the proposal for developing Codex guidance on food safety considerations related to the use of recycled materials in food packaging.

It is “crucial in addressing global challenges such as climate change, environmental protection, and sustainability,” the ministry said.

Further, at the session, India shared its experience with the FSSAI guidelines on recycling post-consumer PET for food contact applications. “India’s participation, as a member, in the High-level Executive Committee (CCEXEC) underscores its dedication to establishing robust food safety standards and promoting fair practices in the global food trade, reflecting its pivotal role in the international food industry,” the ministry noted.

–IANS

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New AI model to boost patient response to cancer therapy

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New Delhi, July 3 (IANS) Australian researchers have developed a new artificial intelligence (AI) tool that can help to select the most suitable treatment for cancer patients.

The new tool DeepPT, developed by researchers at The Australian National University (ANU), predicts a patient’s messenger RNA (mRNA) profile.

This mRNA — essential for protein production — is also the key molecular information for personalised cancer medicine.

When combined with another tool called ENLIGHT, DeepPT was found to successfully predict a patient’s response to cancer therapies across multiple types of cancer, said lead author Dr Danh-Tai Hoang from ANU.

Dr Hoang said, “DeepPT was trained on over 5,500 patients across 16 prevalent cancer types, including breast, lung, head and neck, cervical and pancreatic cancers”.

The tool, detailed in the journal Nature Cancer, showed an improvement in patient response rate. The AI tool draws on microscopic pictures of patient tissue called histopathology images, also providing another key benefit for patients.

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“This cuts down on delays in processing complex molecular data, which can take weeks,” Dr Hoang said, as any delay can affect patients with high-grade tumours who might require immediate treatment.

“In contrast, histopathology images are routinely available, cost-effective, and timely,” Hoang added.

–IANS

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Limit ghee, coconut oil if you have fatty liver disease: Expert

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New Delhi, July 3 (IANS) As fatty liver disease is increasing in India, a noted hepatologist on Wednesday advised limiting consumption of saturated fats like ghee and coconut oil.

Fatty liver disease is related to obesity and diabetes. Consuming excessive carbohydrates can raise insulin levels, and chronic high insulin levels lead to insulin resistance. This disrupts metabolism and converts excess glucose into fatty acids, which are stored in the liver.

It can be classified into two main types: alcoholic fatty liver disease (AFLD) and non-alcoholic fatty liver disease (NAFLD/MASLD) — linked to liver inflammation and damage, eventually leading to fibrosis, cirrhosis, or liver cancer.

“In the Indian context, if you have metabolic-disorder-associated fatty liver disease (previously NAFLD), remember to limit saturated fat sources in your diet,” said Dr Abby Phillips, popularly known as LiverDoc, on the social media platform X.com.

“This means limiting foods containing Ghee, clarified butter (north India), Coconut oil (south India), and Palm oil (processed/ ultra-processed foods),” he explained, adding that “saturated fats increase liver triglycerides and hence liver fat and inflammation.”

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While ghee is traditionally considered healthy, the doctor noted that it “is not a superfood. It is a super danger. It is almost all fat, and more than 60 per cent is saturated (unhealthy) fat.”

He stressed the need to replace it with “healthier (vegetable) seed oils that have low saturated fat and trans-fat content.”

Dr Abby also recommended using a diverse range of seed oils in daily cooking. Instead of frying food items, he suggested “bake, boil, broil, grill, or steaming foods.”

He also called out to “increase portions of plant-based protein in daily meals and to add daily fresh cut fruit portions (instead of fruit juicing).”

“This is far more important than limiting meat (including lean meat more than red meat), fish, and eggs — all of which can be consumed in their recommended daily/weekly intake,” the doctor said.

–IANS

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Aspirin can prevent complications in pregnancy caused by flu infections: Study

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New Delhi, July 3 (IANS) Taking low-dose aspirin may treat flu-induced blood vessel inflammation, creating better blood flow to the placenta during pregnancy, according to the world-first study conducted in mice.

Low-dose aspirin is commonly taken to prevent preeclampsia — high blood pressure condition in pregnancy — as it stops the body from creating chemicals that cause inflammation.

The study, led by an international team from RMIT University in Australia in collaboration with a team from Trinity College Dublin, Ireland, examined whether the treatment for preeclampsia could be applied to flu infections.

They found very promising results in animal studies — mice treated daily with low-dose aspirin had less inflammation and improved foetal development and offspring survival.

On the contrary, foetuses and placenta from mice with influenza A were smaller than those from uninfected mice. They also found the foetuses with low blood oxygen and poor blood vessel development.

Flu infections during pregnancy can resemble preeclampsia, a pregnancy complication that causes inflammation to the aorta and blood vessels, said lead researcher Dr Stella Liong, a post-doctoral research student at RMIT University in Melbourne.

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She explained: “When the vascular system gets inflamed, it leads to poor blood flow and affects the aorta’s function.”

“This is especially a problem during pregnancy where good blood flow to the placenta is crucial to the development of the foetus.”

While the research still awaits human clinical trials, Liong said low-dose aspirin is already recognised as safe to take during pregnancy.

However, pregnant people must seek medical advice before taking new medications, the research team said.

–IANS

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