Histamine, mast cells, and chronic inflammation

Why some bodies remain stuck in "alert" mode

For several years now, a phenomenon has been intriguing me more and more.

Some people develop generalized hypersensitivity:

• they react to certain foods

• to drugs

• to odors or chemicals

• to heat or stress

• sometimes even with effort

And yet, standard medical tests often come back normal.

Research is now beginning to understand that one component of the immune system could play a central role in these situations: mast cells.

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Mast cells: the "sentinels" of the immune system

Mast cells are immune cells found in many tissues throughout the body:

• the skin

• the intestines

• the lungs

• the brain

• blood vessels

Their role is to quickly detect danger and trigger an inflammatory response to protect the body.

When they become active, they release different molecules:

• histamine

• cytokines

• prostaglandins

• leukotrienes

These substances normally help fight infections and repair tissue.

But they are also responsible for several well-known symptoms:

• redness

• swelling

• itching

• inflammation

• fatigue

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When the defense system becomes too sensitive

Imagine a smoke detector.

When properly adjusted, it only activates in the event of a fire.

But if it becomes too sensitive, it may sound:

• when you toast bread

• when steam rises from a shower

• or even for no apparent reason

That's kind of what can happen with mast cells.

They may begin to react to normally harmless stimuli, such as:

• certain foods

• medicines

• temperature variations

• chemical odors

• stress

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An important scientific discovery

In 2015, researchers identified a specific receptor present on mast cells, called MRGPRX2.

This receptor allows certain substances to activate mast cells directly, without going through the usual allergic mechanisms.

When this receptor is stimulated:

• mast cells rapidly release histamine

• an inflammatory reaction may occur

This can cause reactions similar to an allergy, even in the absence of allergic antibodies.

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Why these reactions can affect the entire body

Mast cells are present in almost all tissues of the body.

When they become hyperactive, they can cause a wide variety of symptoms:

• skin: redness, hives

• intestines: digestive pain, bloating, transit disorders

• nervous system: fatigue, brain fog

• cardiovascular system: palpitations or discomfort

• respiratory tract: feeling of tightness

This explains why some people have multiple symptoms that are difficult to link together.

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The link between the nervous system and the immune system

A particularly interesting aspect is the relationship between mast cells and the nervous system.

These cells communicate directly with nerve fibers.

When a nerve is stimulated by:

• stress

• pain

• inflammation

it can release substances that in turn activate mast cells.

This can create a cycle where:

stress → nervous system activation → mast cell activation → inflammation → amplification of symptoms.

This phenomenon is sometimes described as a neuroimmune interaction.

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Why these hypersensitivities seem to be increasing

Several factors of modern life could contribute to this increase:

Chronic inflammation

When the body remains in an inflammatory state for a long time, certain immune cells become more reactive.

The gut microbiota

The gut plays a central role in regulating the immune system.
An imbalance in the microbiota can promote inflammation.

Persistent infections

Some infections can keep the immune system in a prolonged state of alert.

Chronic stress

The autonomic nervous system directly influences the immune response.

Environmental exposures

Pollutants, endocrine disruptors, and chemicals may also contribute to this hypersensitivity.

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When the body remains stuck in "survival" mode

When several of these factors accumulate, the body can remain in a state of chronic alertness.

In this context:

• the nervous system remains activated

• mast cells become more sensitive

• the inflammation persists

The body can then enter a cycle where minor stimuli trigger disproportionate reactions.

 

We have our neuro-recalibration program to help you get out of this "survival" mode. Contact us for more information or take a look HERE.

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Why these discoveries are changing our view of certain diseases

These mechanisms could help to better understand several situations that are still poorly explained:

• multiple hypersensitivities

• food intolerances

• unexplained reactions to certain medications

• chronic fatigue

• persistent inflammation

Mast cells are now considered by some researchers to be a key player in many modern inflammatory diseases.

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The encouraging point

The immune system has a great capacity for adaptation.

When the body gradually regains a better balance:

• inflammation may decrease

• mast cells may become less reactive again

• the nervous system can return to a more peaceful state of functioning

That is why many approaches to health today focus on:

• the balance of the gut microbiota

• reduction of inflammation

• regulation of the nervous system

• overall healthy lifestyle

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Key points to remember

Not all inflammatory or allergic reactions are true allergies.

Some may be linked to excessive activation of mast cells, which trigger an inflammatory response even in the absence of any real danger.

Understanding these mechanisms provides a better understanding of certain hypersensitivities that are increasingly observed today.

 

 

 

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