Cardiovascular Diseases Due to Microplastic Ingestion

Introduction

Most single-use plastic goods break down gradually in the environment and continuously transform into nanoplastics (NPs) and microplastics (MPs), which present new environmental risks. MPs can enter cells and cause harm to tissues and organs by interfering with intracellular signaling pathways, modifying immunological homeostasis, and so on. The primary toxicological mechanism following MP exposure is the generation of reactive oxygen species, which can also trigger the synthesis of danger-associated molecular patterns (DAMPs) and interact with the processes of TLR disruption, cytokine production, and inflammatory responses in immune cells. MPs combine with external contaminants, poisons, and infections to produce increased toxicity and potent negative effects. They also connect with cell membranes or internal proteins to form a protein-corona.

What Are Microplastics?

Microplastics (MPs) are microscopic, usually less than 5 mm in size plastic pollutants that enter the ecosystem. These pollutants are mainly created industrially. Pollutants are called primary MPs when plastic particles of this specific size are manufactured intentionally. Secondary MPs are tiny particles produced by larger plastic components undergoing thermo-oxidation or mechanical segregation processes. Furthermore, waste plastic can also exist as nanoplastics (NPs), particles smaller than 1 μm. According to a recently reported ecotoxicity, MPs and NPs are chemically inert substances that can enter and remain forever in freshwaters, terrestrial habitats, and marine environments. Their capacity to carry infections and chemical pollutants such as heavy metals has led to recent reports regarding them as substances that pose a health risk.

What Are Cardiovascular Diseases?

A collection of conditions known as cardiovascular illnesses impact the heart and blood vessels. These conditions may affect one or more cardiac and blood-vascular components. A person may be asymptomatic—not feeling anything at all—or symptomatic—physically experiencing the disease. Heart or blood vessel problems are included in cardiovascular diseases, such as

• Constriction of blood arteries in the body as a whole, in the heart, or other organs.

• Issues with the heart and blood vessels exist from birth.

• Heart valves are not functioning properly.

• Abnormal heartbeats.

How Does Microplastics Enter the Body?

Following the several pathways via which plastic particles enter the body:

1. Ingestion: Microplastics can enter the body through food and water contaminated with them. There is mounting proof that microplastics are present in food and water. Reports of microplastics in common fruits and vegetables have been made. Microplastic particles have been seen to be absorbed by wheat and lettuce plants in laboratory settings; this suggests that the particles initially entered the products by uptake from soil that contained them.

2. Inhalation: Human exposure to micro- and nanoparticles, including airborne particulate matter and manufactured nanoparticles based on metal and carbon, is mostly determined by inhalation. Multiple investigations conducted in vitro and in vivo have demonstrated the harmful mechanism of these airborne particles.

3. Dermal: Microplastics from products used in daily life can enter the system dermally. Microplastics from washing machines and personal hygiene products can also be found in sewage sludge.

How Does Microplastics Enter into the Food?

The small size of microplastics makes them easily ingestible. Because they resist biodegradation, they migrate easily up the food chain and endure in the environment. A few of the various means by which microplastics enter the body are as follows:

1. Unreacted monomers, contaminants (such as reaction byproducts or leftover catalysts), and the polymer itself can all be the source of ecotoxicity.

2. Additives, such as stabilizers.

3. Additional materials (such as plasticizers, lubricants, or colors) in the polymer matrix

4. If microplastics are not removed by filtration during the sewage treatment process, they can enter the human body.

5. Microplastics can leak into the ocean, endangering people and the environment.

6. Seafoods.

7. Food chains (Plankton, the lowest trophic level in the food chain, is where microplastics build up).

8. Food wrapped in plastics for a long time.

What Are the Effects of Microplastics or Nanoplastics on the Circulatory System?

A few of the changes in the circulatory system are as follows:

1. Modification of the biochemical parameters in blood.

2. Decreased capacity for immunity.

3. Generation of ROS.

4. Alterations in hormones.

5. Vascular structural injuries.

6. Compromised angiogenesis.

7. Thrombosis.

8. Reduced levels of hemodynamics.

A few of the changes in the heart are as follows:

1. Pericardial edema.

2. Cardiotoxicity.

3. Impaired heart function:

   1. Tachycardia.

   2. Bradycardia.

4. Cardiac sarcomeres alteration.

How Can It Be Treated?

• Carotid Endarterectomy: A carotid endarterectomy (CEA) is performed surgically to treat carotid artery disease. The carotid arteries are the primary blood vessels that supply oxygen and blood to the brain. Microplastics cause these arteries to narrow in carotid artery disease, and a stroke may result from this decreased blood supply to the brain.

How Can One Avoid Microplastic From Entering into Their System?

Following are a few suggestions by which one can avoid microplastics from entering their body:

1. Avoid Processed Food: Consuming highly processed foods, such as French fries, ice cream, soda, hamburgers, ready-to-eat meals, and canned goods, has been related in studies to increased body levels of phthalate microplastics, particularly in young people.

2. Eco-Friendly Packaging: Adopt eco-friendly packaging materials such as rice husk bowls and storage containers; stainless steel bento boxes and reusable water bottles; glass storage containers, portable bowls, and water bottles; and bamboo lunch boxes, bowls, cutlery, and pantry storage jars. Selecting these substitutes lessens the amount of microplastics that enter the food chain and the exposure to them.

3. Use Glass and Stainless Steel Bottles: People who use plastic water bottles for their fluid intake are nearly two to three times more likely to be exposed to microplastics than those who use other types of water bottles. To lessen microplastic exposure, switch out single-use or BPA-containing water bottles with glass or stainless steel alternatives.

4. Use Loose Tea Leaves Instead of Tea Bags: Packaged bags frequently include dangerous chemicals and microplastics that contaminate water and the tea produced with them. To reduce the exposure to tea bags containing microplastics, use loose tea leaves or a tea infuser.

5. Steer Clear of Plastic-Bagged Food: Avoid using plastic bags instead of reusable containers or non-plastic wrappers when storing and packing food.

Conclusion

Microplastics are a novel class of environmental pollutants widely dispersed throughout the biosphere. The immune system is strained by plastic fragments, which provide a threat in addition to physical, biological, and chemical threats. The most recent research on MPs and NPs shows that exposure to plastic particles in the environment through various routes may impact blood immune system cells, perhaps causing genotoxicity and altering cardiac function. A trophic transfer across the bloodstream was described by the accumulation of several plastic types in the heart, and cardiotoxicity was noted in mammalian systems. Since cardiovascular diseases are the leading cause of death globally, it may be possible to save lives by investigating how plastic particles affect morbidity and mortality.