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Eosinophil cationic protein increase is one of the reasons for the cerebrovascular diseases and related neurological disorders

The main idea: an increased level of eosinophil cationic protein contributes to cerebral vascular spasms. The word «spasm» in this context means temporal blood vessels narrowing, while the degree of narrowing may vary significantly.

The material was prepared by a person without medical education after struggling with neurological disorders described in the article (see «About the author»). There may be some loss in translation, so if any question arise, please contact the author via e-mail


  1. Abstract
  2. Possible symptoms
  3. Cerebral vascular spasms
    — Trigger-factors
    — Condition-factors
  4. Neurotoxic effect of ECP
  5. Relationship between increased ECP level and vascular spasms
  6. Reasons for increase in ECP and additional comments
  7. Conclusion
  8. References

About the author
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Various cerebrovascular diseases and concomitant neurological disorders may be connected with an increased level of eosinophil cationic protein (ECP) in the blood.

ECP is a small protein released from eosinophils as a result of certain immune reactions. ECP increase is possible in case of different states connected with allergic reactions, bacterial infections, parasitic invasions, etc.

ECP is known to be neurotoxin, but the author believes that the impact on the brain is connected to a larger degree with mediated influence through cerebral vessels rather than direct neurotoxic effect. Increased ECP level contributes to spasms of the brain vessels, leading to ischemia of separate parts of the brain and concomitant neurological disorders. The variety of neurologic manifestations in that case is connected with the fact that at different moments of time different parts of the brain may suffer from ischemia (which leads to focal neurological signs). Despite the temporary nature of the disturbances, in the long term the condition probably may lead to encephalopathy as a result of neuron death and thickening vessel walls.

The mechanism of ECP influence on the vessels may include several factors (a detailed description is given in the article):

  1. change in permeability of cell membranes and disruption of key ions homeostasis (including Ca2+) in autonomic [vegetative] neurons and astrocytes, which results in an uncontrolled discharge of neurotransmitter (noradrenaline), especially when the cervical spine and cervical nerves are affected;
  2. change in permeability of cell membranes and disruption of key ions homeostasis in vascular smooth muscle cells, which disturbs the mechanism of their constriction and relaxation especially under the influence of vasoactive substances;
  3. damage of the vessel wall, leading to dysfunction of vessels’ endothelium and discharge of vasoactive substances in case of direct influence on the vessels.

Disturbances are possible even with a moderate increase in ECP level (30-40 ng/ml with the norm of <24 ng/ml), without an increase in eosinophils and without Hypereosinophilic Syndrome (this is important in terms of extent of such diseases spreading). Similar influence may probably be produced by the ECP relatives, major basic protein (MBP) and especially eosinophil-derived neurotoxin (EDN).

Possible reasons of increased ECP: inflammatory processes in intestines (as a result of small intestine bacterial overgrowth, sensitivity to gluten, liver and bile ducts diseases, etc.), parasitic invasions, allergic reactions, bacterial infections (for example, in the nasopharynx), etc.

Thus, if there are complaints about neurological disturbances of unclear etiology, it’s reasonable to undergo an ECP assay. If increased values are found, the reasons for the increase (primary disease) should be defined and treated first. Before ECP normalization, the patient’s condition may be improved considerably by taking selective calcium channel blockers (for example, nimodipine) or α1-adrenoreceptor blockers, and by minimizing trigger-factors which launch the constriction mechanism.

The practical value of the article consists of the description of non-evident reasons for neurological disorders and cerebrovascular diseases, as well as the method of their timely detection (- control of eosinophil cationic protein).
The scientific value consists of a detailed description of the mechanism of mediated influence of the eosinophil cationic protein on the brain, which differs from the direct neurotoxic effect described in the literature. The described mechanism may play a key role in the appearance of a number of cerebrovascular diseases.


The material has been prepared by a person without medical education, so there may be some inaccurate moments in the article. The author will be glad with any comments and remarks, but at the same time calls to focus attention on the key idea of the article rather than specific details.

The author does not have a sufficient base for statistically reliable conclusions at his disposal. The conclusions are based on a number of scientific articles (in the sphere of neurotoxic influence of ECP) and, to a larger extent, on personal observations and experiments (on the medical assays background).

In Western practices, one may find articles that are based on a description of one notable case («case reports»). The purpose of these articles is not to prove something, but to draw the attention of the medical and scientific community to significant observations. This is the purpose of this website as well.

An additional limitation is imposed by the fact that the author was limited by analyses accessible in Russian commercial laboratories. For example, other ECP-related proteins, eosinophil-derived neurotoxin (EDN) and major basic protein (MBP), may play an important role, but the author had no possibility to attempt these analyses. Similarly, sensitivity to gluten is determined on the basis of 6 analyses in the laboratories accessible for the author, while Western practice uses a much larger number of tests.


Eosinophil cationic protein, vascular spasms, focal neurological signs, cerebrovascular disease, transient ischemic attack, stroke, encephalopathy, vascular dementia, gut-brain connection, intestinal inflammation, gluten enteropathy, parasitic invasion.

Possible symptoms

During the study of the topic the author used the observed symptoms as a basis, so the article starts with their description. Symptoms varied significantly and changed with the course of disease. During the first year of disease (2011) it was difficult to clearly define the symptoms — on rare days there was a sense of overall mental dullness (like in case of fever or hangover) and an increased intracranial pressure. Symptoms became more pronounces with a course of time, and at the same time more varied and clearly defined — that is, focal neurological signs were observed. Such symptoms were transient (from several minutes to several hours) and reversible. The symptoms could be observed independently from each other. Frequency, variety and severity of the symptoms increased with the course of time, and in worst moments (end of 2014) there were signs of the transient ischemic attack verging on ischemic stroke.

The list of possible symptoms is given below (they are grouped for convenience of reading, though it’s probably possible to group them by the localization of the disturbances):

Mental abilities

  • Considerable problems in performing simple mental work which does not seem complicated at other times;
  • considerable deterioration of memory, complications while attempting to recall simple things (for example, date of birth);
  • inability to focus attention and concentrate;
  • decrease in clarity of mind and overall mental dullness.


  • decrease in speech clarity, unintelligible speech, inability to pronounce some words;
  • incoherence, irrationality of speech, difficulties with thoughts formulation;
  • substitution of words, inability to remember or choose the proper word;
  • difficulties with understanding the speech of others.

General state

  • clouding of consciousness (similar to the state of high fever, сondition on the verge of fainting);
  • mood inadequate to the situation (risibility, euphoria, absence of emotions, etc.).


  • pain in the eyes (often in one eye), temporary impairment of vision, diplopia, defocusing of vision;
  • impairment of hearing (often on one side), tinnitus;
  • change in face mimics (masklike face, lowered edges of lips);
  • negligence, unsteady gait;
  • changed handwriting, omission of letters in words, frequent mistakes during typing.

Possible concomitant symptoms

  • headache;
  • feeling of tension in the occipital lobe of the head;
  • eye dryness, eye redness;
  • dryness and formation of crusts in the nasal cavity;
  • allergic signs of unclear etiology (dermatitis, itchiness, etc.);
  • very frequent yawning, feeling of being unable to inhale fully.

As previously mentioned, the symptoms were observed independently from each other, i.e. it was possible that the author could easily perform mental work but had difficulties with explaining it in an intelligible way. The state could be «tested» by doing simple operations, such as multiplication in mind, telling tongue twisters, formulating a monologue on a free topic, etc. At different time points difficulties with different actions occurred.

The severity of symptoms may also vary, they may be barely noticeable (even from the patient’s point of view) or they may considerably influence behavior and work capacity.

Cerebral vascular spasms

The author believes that the described neurological disorders were caused by ischemia of separate parts of the brain as a result of vessels constriction (spasm). Such opinion was based on the results of funduscopy (it was said in the conclusion that the vessels of the eye ground are slightly narrowed) and a sense of the localization of disorder — sense that some definite brain areas suffer from ischemia (it could be felt despite of the absence of pain). At the same time MRI, angiography and other studies did not reveal any organic pathology. The main fact confirming the version of vessel spasms was a remarkable improvement of the state after taking selective calcium channel blocker — nimodipine.

Speaking about the spasms of vessels, it is logical to divide the reason for their appearance into two parts (though the author did not notice such classification in literature):

  • trigger-factors — factors that triggers the mechanism of spasms (that is, leading to immediate spasm);
  • condition-factors — factors that enable the launching of the spasm mechanism even when minor trigger-factors occur. Not all people suffer from vascular spasms, whereas everybody is exposed to trigger-factors, so it is the presence of condition-factors that may differentiate an ill person from a healthy one.


Trigger factors are numerous and diverse.
If we consider the issue from the patient’s point of view, the trigger factors may include turning of the head, working with a low tilt of the head (for example, while reading from paper or during work with a low located monitor), sleeping on a too high/low pillow, forced inconvenient position, harsh riding, uncomfortable clothes and so on.

A considerable part of these factors is connected with the neck (in one way or another), in particular — with vertebral arteries and/or cervical nerves. The cervical nerves covers vertebral arteries and innervates the brain vessels which make up the basin of vertebral arteries [Малыхин, 2007], it was described that impact on the cervical nerves (including a result of an injury or spine diseases) may lead to a reflectory spasm of vessels [Попелянский, 2003] .

In the Soviet and Russian practice, a connection of neurological disorders with the state of the spine is considered by such a branch of neurology as vertebroneurology founded by Ya. Popelyansky. However, vertebroneurology is often being criticized, and it is thought to be in crisis now, partly due to the fact that practical observations do not fully conform to the theoretical basis [Ахмадов, 2012]. Discrepancies in vertebroneurology were described by the student of Ya. Popelyansky, Professor V. Veselovsky, who also noted «absence of parallels between the degree of expression of clinical signs and X-ray changes in case of dystrophic damage of the spine» [Ахмадов, 2012].

In case of the author, problems with the cervical spine do not completely explain the observed symptoms either. First of all, personal observations show that triggers are sometimes the events not connected with the cervical spine, for example, eating a lot of sweets (probably, due to a vasoconstrictive effect of insulin), smoking (vasoconstrictive effect of nicotine) or bright light. Secondly, at certain moments (especially at the end of 2014), spasms were caused by as little as brushing teeth or a slightest turn of the head, while in other periods there were no spasms for weeks with the same trigger-factors. At the same time, no considerable changes in the state of the cervical spine were observed.

Thus, the trigger-factors play a role of a trigger, but it is only a part of a problem, while vascular spasm occurs only under certain conditions.


One of the first directions of investigating condition-factors was the study of the renin-angiotensin system. It was assumed that it’s dysfunction may be a predisposing factor for vascular spasms. Specifically, it was supposed that spasms are caused by the dysfunction of vascular endothelium, which could have meant that the impact on the vessels (in case of trigger-factors) made the vessel wall produce vasoactive substances (endothelin and angiotensin converting enzyme), leading to the spasm further along the blood vessels.

The author considered vasculitis connected with autoimmune processes as one of the possible reasons for endothelial dysfunction. At the same time, a connection was observed between the strengthening of neurological disorders and different allergic signs of unclear etiology (dermatitis, eruption on the head skin, formation of crusts in the nasal cavity, etc.). All that led to the supposition of an immune-allergic nature of disease, as a result the author performed (among others) eosinophil cationic protein assay which turned out to be elevated (fluctuated within range of 24-50 ng/ml with the norm of <24 ng/ml).

At this moment the author believes that the mere fact of ECP increase is the predisposing factor (i.e. condition-factor) which makes cerebral vascular spasms possible even as a result of minor influence on the vessels and/or cervical nerves.

Neurotoxic effect of ECP

Eosinophilic cationic protein is a small protein released from eosinophils as a result of certain immune reactions. ECP is known to be neurotoxin [Soroka, 1995; Fredens, 1982; Navarro et al., 2010]. The initial information of eosinophils’ neurotoxicity refer to 1930s when the «Gordon’s phenomenon» was described — that is neurological disorder in rabbits after injection of lymph nodes suspension from a patient with Hodging’s disease. This effect was associated with the presence of eosinophils in the suspension. It was shown later that an ECP injection also leads to Gordon’s phenomenon [Fredens, 1982].

By now, the cases of rapid development of dementia and early strokes in people with hypereosinophilic syndrome have been described [Briania et al., 2001; Kaplan, 2011; Nallegowda et al., 2003; Weaver, 1988]. In spite of this, the mechanism of neurotoxic effect of ECP still has not been fully investigated.

The study [Navarro et al., 2010] gives the following conclusions following a number of experiments:

  • ECP binds to the cell membrane, changing its permeability and altering the internal cell balance of key ions. This refers to neurons as well as other kinds of cells [Navarro et al., 2007].
  • ECP launches the mechanism of cell apoptosis (that is, the mechanism of «normal», «programmed» death).
  • In the experiments, ECP leads to death of both neurons and astrocytes, with direct dependence of cells survival on ECP concentration.
  • High ECP concentrations lead to a sharp upsurge in concentration of calcium ions inside the neuron/astrocyte.

The statement of the change in the intracellular balance of ions is especially important in the context of discussing the spasms of the cerebral vessels.

Relationship between increased ECP level and vascular spasms

The described direct neurotoxic influence of ECP does not fully explain the symptoms observed by the author. According to the author’s observations, the main role in neurological disorders may be played exactly by the spasms of cerebral vessels which, in turn, are also connected with an increased ECP level. Surely, the author has no means to investigate comprehensively the EСP impact on the vessels, but several mechanisms are likely to be involved here:

  1. Change in permeability of cell membranes and disruption of key ions homeostasis (including Ca2+, which plays a key role in mediator emission) in vegetative neurons, which increases their excitability and leads to an uncontrolled discharge of the mediator, noradrenaline, which has a strong vasoconstrictive effect.

    This version matches the cervical nerves syndrome in the best way, that is, increased ECP level makes cervical nerves more excitable and leads to a discharge of vasoconstrictors as a result of even a slight influence on the cervical spine.

    This version describes well the author’s personal observations, according to which the probability of spasm depends on the current ECP level. With normal ECP level spasm practically does not occur (regardless of the trigger-factors), with high ECP levels it occurs even under slightest trigger-factors. Also, the spasm may occur in different parts of the brain, probably depending on where noradrenaline was discharged.

  2. Change in permeability of cell membranes and disruption of key ions homeostasis in vascular smooth muscle cells, which disturbs the mechanism of their constriction and relaxation especially under the influence of vasoactive substances. A similar mechanism was described with regards to bronchi in [Madison et al., 2000]. This version is supported by the presence of trigger-factors not connected with the cervical spine.
  3. Damage of the vessel wall by the ECP, leading to the dysfunction of vessels’ endothelium. In case of endothelial dysfunction the «mechanic» impact on vessels may cause the release of vasoconstrictors and distribution of spasm further along the vessels.The impact of ECP on the vessels was mentioned in [Weaver, 1988; Soroka, 1995]. However in [Weaver, 1988] it is assumed that the impairment of the vessel wall leads to a thrombosis and to embolic brain infarction as a consequence. Author assumes another cause of ischemia vasospasms themselves (with or without thrombosis). This is a fundamental difference, as it assumes use of the other therapeutic means (calcium channels blocking agents and α1-adrenoceptor blocking agents).

    This version is supported by the fact of gradual aggravation of symptoms (gradual endothelium damage is possible). However, this version is contested by the fact that the spasm occurs in different parts of the brain. If it was the main reason, vasoconstrictors would be produced in the same place of vertebral artery and influence the same brain parts after turning the head. Furthermore, it was noted that the most pronounced spasmolytic effect was produced by calcium channels blocking agents and α1-adrenoreceptor blocking agents, while taking angiotesin-converting enzyme inhibitors and angiotensin-II receptor antagonists did not give any noticeable result (so it supposed to be less probable that the problem is connected with discharge of an angiotensin converting enzyme).

  4. Disruption of key ions homeostasis in astrocytes, which may also produce vasoactive substances. This mechanism is supported by general deterioration of state when ECP is particularly high, even in absence of evident trigger factors and without sense of the localization of disorder.

The same influence may probably be exerted by ECP-relative protein — eosinophil-derived neurotoxin (EDN), which has the properties similar to a large degree to properties of ECP [Gleich G. et al., 1986; Navarro S. et al., 2010].

Regardless of which mechanism plays the main role here, all of them predispose the occurrence of the cerebral vascular spasms. Furthermore, despite the transitory nature of spasms, it seems quite evident that they may lead to encephalopathy in the long term due to neuron death and thickening of vessel walls.

Reasons for increase in ECP

*The section will contain fewer references to literature and more personal observations (considering «forking» of reasons and their individuality), the information may be updated and expanded*

The reasons for increase in ECP may be quite individual, so finding one reason, relevant for all patients, is not the purpose of this section. An increase in ECP may result from a multitude of factors, and they are unfortunately not always evident.
The following main reasons for an increase in ECP are enumerated most often in literature/on the Internet:

  • parasitic invasions;
  • allergic reactions;
  • bacterial infections;
  • bronchial asthma;
  • autoimmune processes.

Less often ulcers and intestinal inflammation are added to the list.

Let us consider the main reasons in detail (on the author’s experience). While reading, it may be noticed that some reasons for ECP increase in literature are already associated with different neurological disorders (despite the fact that increase in ECP is not mentioned in that cases). That is, increased ECP level unites different diseases which may result in neurological disorders.

Parasitic invasions

Parasitic invasion was the author’s first version (it was not confirmed later on). ECP is toxic for parasites [Soroka, 1995] and its level increases with the majority of parasitic invasions. It is interesting to note that both leading and ordinary employees of the Martsinkovsky Parasitology Center (Moscow) were not surprised at a possible connection between neurological disorders and parasites. Neurological disorders caused by invasions are quite well-known and evident for parasitologists. It is important that this effect is produced not only by rare parasites, located right in the brain, but also all of the most widespread kinds. The concomitant neurological disorders are usually connected with their toxic influence on the body.

Thus, the first thing to be tested in case of an increased ECP (especially in children) is the presence of the most widespread parasites.

Allergic reactions

The author’s next version was hidden allergic reaction. The main allergens (respiratory and food panels) were tested, but the result did not give any reasons to talk about allergy.

However, it was found out later that food panels do not allow to precisely define one of the widespread food allergies, sensitivity to gluten. Sensitivity to gluten is determined by a whole number of specific tests. Russian laboratories use about 6 tests, while there are about 24 of them in the Western practice (CYREX array 3). Probably this is the reason why gluten-sensitive enteropathy is diagnosed much more frequently in the western countries. Besides, it should be noted that, in accordance with present day knowledge of gluten-sensitive enteropathy, this disease is no longer considered to be rare, and distribution of its hidden forms may achieve 1:100 [Парфенов, 2013], and according to some data — 1:3 [Perlmutter, 2013 / Перлмуттер, 2014]. Also, hidden forms of gluten-sensitive enteropathy often disguise as other diseases.
It turned out that the connection between sensitivity to gluten and neurological disorders had been already described, for example, in [Perlmutter, 2013 / Перлмуттер, 2014]. However, in [Perlmutter, 2013 / Перлмуттер, 2014] another mechanism of influencing the brain is presupposed, without participation of ECP or vascular spasms.

Thus, increased ECP also requires taking gluten sensitivity assays and, if necessary, sensitivity to other allergens (food and respiratory panels).

The question of whether the website author is sensitive to gluten still remains open. Five out of six tests are within reference values, and one is permanently increased (deamidated gliadin peptide antibodies, IgA). However, a biopsy did not confirm gluten-sensitive enteropathy, and the results of genetic studies also testify to its low probability. Gluten-free diet did not influence dynamics of ECP and deamidated gliadin peptide antibodies, though there are notable details described in the section «Additional comments».

Intestines inflammation (as a result of dysbacteriosis)

At the same time, a biopsy revealed inflammation of intestines (chronic duodenitis and colitis), supposedly of a bacterial nature (tests showed the development of opportunistic pathogenic and pathogenic microflora). Inflammation of intestines may also lead to increased ECP, and this is the author’s current version (regarding the reason for ECP increase in the case of the author).

The following observations should be provided here:
— the author observed the longest remission period in the middle of 2014 (complete absence of neurologic disorders). At that moment, the author had no version about spasms or ECP, but it was noted that it had happened after a course of antibiotics (in connection with another disease);
— at the end of 2014, the author experienced a period of the most frequent, severe and continuous neurological disorders. Supposedly, after treatment with antibiotics in the middle of the year, the intestinal microflora were not completely restored, whereas a shortage of useful microflora leads to the development of pathogenic microflora;
— in August of 2016, after treatment of another disease with antibiotics, ECP fell notably, but it restored over the following weeks (see the diagram below);
— in November of 2016, after duodenitis and colitis were diagnosed, treatment with antibiotics also resulted in falling ECP, but its level also restored over the following weeks;
— in April of 2017, taking Natamycin antimycotic agent (against Candida fungi whose development was discovered in dysbacteriosis analysis), which is active only in intestines, also resulted in a sharp decrease in ECP. However, it is possible that the decrease was connected not so much with elimination of Candida fungi but more with ECP withdrawal from the intestines as a result of Natamycin’s side effects; either way, the connection between ECP and intestines is quite visible.

Thus, if ECP exceeds the norm, one should take dysbacteriosis assay (it worth be noted that in Western practice a term «Intestinal Bacterial Overgrowth» is used to describe dysbacteriosis which underlines the proliferation of pathogenic microorganisms). If development of opportunistic pathogenic and pathogenic microflora is found, the patient needs to consult a gastroenterologist first. Before the microflora balance is restored, one can reduce the influence of ECP (and endotoxins associated with development of pathogenic microflora) by taking enterosorbents (for example, polymethylsiloxane polyhydrate). Also it should be always kept in mind that the use of antibiotics requires complete recovering of microflora in the intestines and ensuring its state even in absence of complaints about GIT functioning.

It was found later that the connection of intestinal microflora with the brain had been also described [Perlmutter, 2015 / Перлмуттер, 2017], but with a different mechanism of connection with the brain (without involvement of ECP and vascular spasms).

Intestines inflammation (as a result of gastrointestinal tract organs disease)

At the same time, development of microflora may only result from intestinal inflammation rather than cause it. Another possible reason of intestinal inflammation is the diseases of GIT organs, including liver and biliary tracts. It is noticeable that there is a separate term which connects brain disorders with liver diseases, hepatic encephalopathy. The concomitant neurologic disorders are also connected with increased content of toxic substances in the blood. Therefore, the patient also needs to take the relevant tests: ALAT, ASAT, Gamma GT, Bilirubin.

The author’s assays listed above are also within the normal range (the only analysis outside reference values is bile acids, but the «diagnostic value» of this test has not been established yet).

Despite the fact that the author still fails to find out the reason for intestinal inflammation, the dependence of ECP level on the state of the intestines is quite evident (in the case of the author).

Other reasons

Other possible reasons for increased ECP:

  • other gastrointestinal tract diseases (including intestinal ulcer);
  • other bacterial infections (e.g. in nasopharynx);
  • other allergic reactions;
  • bronchial asthma;
  • autoimmune diseases (neurological manifestation of systemic lupus erythematosus — neurolupus).

As the reasons are quite individual, additional hypotheses probably should base on the patient’s anamnesis.

Additional comments

* The information may be updated and expanded *

  • Eosinophils were normal over the whole period of observations. ECP ranged within 24-50 ng/ml (with the normal value of <24 ng/ml). That is, the described case is not one of the quite rare hypereosinophilic syndromes. This is important in terms of extent of such diseases spreading.
  • During practically the whole period of observations, the level of uric acid was increased (and it fell after duodenitis and colitis treatment). It is interesting to note that there is information about the protective influence of uric acid in case of brain ischemia [Mattson M. et al., 2000].
  • Within the whole blood assays (a very large list) only consistent elevation of ECP, uric acid and deamidated gliadin peptide antibodies IgA was observed. The liver biochemistry samples has normal values (except for biliary acids). The thyroid gland is functioning normally.
  • Dynamics of deamidated gliadin peptide antibodies IgA was not fully explained by the diet. The result could be quite low with consumption of gluten-containing products and quite high when a diet was followed. Probably sensitivity to gluten may also be connected with the state of intestinal microflora [Barcik W. et al., 2016; Caminero A. et al., 2015]. According to the author’s observations, the state of microflora in the intestines predetermined the results of other analyses. In several cases, when the test for dysbacteriosis did not reveal any abnormalities, ECP, uric acid, deamidated gliadin peptide antibodies IgA and biliary acids showed normal values.
  • The results of dysbacteriosis test were unstable in time and changed significantly even over one week. However, it was noticed that a deterioration of state and increase in ECP was possible without excessive growth of gram-negative bacteria. This fact supports the idea that the impact of intestinal microflora on the brain is connected not only with lipopolysaccharides (which result from the decay of gram-negative bacteria).
  • Despite the fact that the author did not manage to reach stable lowering of ECP yet, the overall state has been radically improved due to treatment with nimodipine (Nimotop, BAYER), control of trigger-factors and diet correction. It is quite possible that the average level of ECP as for the end of 2014 (when the most severe symptoms were observed) was significantly higher, but unfortunately it cannot be proved now.


Thus, on the one hand, an increase in ECP may play a key role in the development of a number of cerebrovascular diseases and concomitant neurological disorders, and on the other hand — regardless of the reason for an ECP increase, which may be quite individual, the ECP assay is a universal diagnostic means which may be widely used in neurology.

It was noted in [Угрюмов, 2014] that the reason for chronic neurodegenerative diseases remains unknown in the majority of cases. The author of this article hopes that the influence of ECP will help to explain the whole range of cerebrovascular diseases and prevent their development in a large number of people.

Proposed work scheme

If there are uncertain neurological complaints, reduced mental ability, different neurological disturbances of unclear etiology, the patient should take the ECP assay. In case of increased ECP level, the reason for the increase (primary disease) should be defined and treated first. While the symptoms remain, the patient’s state may be considerably improved:

  1. by taking selective calcium channel blocking agents (nimodipine); someone may benefit from α1-adrenoreceptor blocking agents (it should be borne in mind that some α1-adrenoceptor blocking agents, being the derivatives of ergot alkaloids (including nicergoline), are no longer recommended in Europe because of possible deferred side effects [EMA, 2013]);
  2. by defining and minimization of trigger factors (for example, sleeping on the back, on a low orthopedic pillow, avoidance of sharp turns/bends of the head, quitting smoking, etc.);
  3. if necessary (depending on the supposed reason) — by taking anti-inflammatory agents, antihistaminic agents to reduce the degree of sensibilization, enterosorbents to reduce ECP and endotoxins in the intestines. Positive effect may also be produced by ginkgo biloba (due to blood viscosity reduction).

Furthermore, considering the chronic and often hidden nature of neurodegenerative diseases, the author believes that ECP assay is worth being included in medical checkup programs for control even in absence of complaints.


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About the author

At the age of 24 (years 2010-2011) I started to notice different neurological disorders (described in the article). Since then, I’ve visited a large number of doctors of different specializations, but the reason for disorders remained unknown. Multiple studies did not show any organic pathology, and all the analyzes I was proposed to do showed values within the normal range.

The problem persisted, reducing the quality of life and threatening my career. I continued to look for the cause myself, based on personal observations and experiments with drugs (on a background of a large number of medical analyzes), as well as a number of scientific articles. This article is the result of my research.
I realize that my conjecture about the role of an eosinophilic cationic protein may be erroneous, but I believe that my conclusions are worth to be verified. In any case, I believe that my material may be useful for neurologists, neurophysiologists and other specialists.

Any questions and comments can be sent to

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