“Spray Fire in my Head” and how putting it out with Verapamil links Histamine, IL6, Mast cells, Calcium Channel Cav1.2, and even the Vagus Nerve

After 18 months of researching autism, things are falling nicely into place.  For regular readers of this blog, it may seem that we have uncovered a bewildering number of issues/dysfunctions that need to be addressed by the science.  In fact, when you look closer still, you will see that many of these issues are interrelated and you do not need to treat each one.  Also, it is clear that many different methods can be used to treat the same dysfunction.  The best methods though would be the simplest, safest, cheapest and the ones that address multiple issues at once.

One such little gem is Verapamil, an extremely cheap calcium channel blocker that has been widely used for 30 years for other conditions. 

Spray Fire in my Head

Monty, aged 10 with ASD, suffers from allergies like many children.  I noticed that his pollen allergy provoked a dramatic increase in his autistic behaviors.  Last year I spent time developing a treatment for these summertime autism flare-ups, to avoid summertime misery for all of us.

My final secret weapon was not a commonly known allergy drug; in fact almost nobody would even consider it for this purpose, except those who read the old research.

Where we live, last the weekend the air was full of tree pollen and it was 28⁰ C/ 82⁰ F; so I was expecting a response from Monty.

He soon had red eyes, briefly rolled about on the floor and declared “spray fire in my head”.

In anticipation of the pollen season, for the last few weeks I have been giving him some mast cell stabilizing treatments, but clearly they were not sufficient; so I mixed up some extra verapamil, and as expected, a few minutes later peace was fully restored.

I have told you about channelopathies in previous posts.  Verapamil blocks the calcium channel called Cav1.2, but I did not tell you that in addition to this Cav1.2 channel affecting behavior and heart disease, it also appears to directly affect allergies and even the vagus nerve.

It would seem that one cheap little pill can address all of these issues.

The take-home points from the literature are these:-

Verapamil is very widely prescribed calcium channel blocker, used to lower blood pressure; but in the literature it is shown that:-

• Verapamil inhibits mast cells and is shown to successfully treat asthma
• Verapamil is more potent than the allergy drug Azelastine (the best mast cell stabilizing anti-histamine drug available)
• Verapamil will reduce histamine release and therefore inflammatory cytokine Interleukin-6 (IL6), already elevated in autism
• Verapamil activates the Gene for IL6
• Verapamil alters the balance between parts of the autonomic nervous system's function, with a shift toward decreased sympathetic tone and increased parasympathetic (vagus nerve) tone
• Autism is associated with an atypical autonomic response to anxiety that is most consistent with sympathetic over-arousal and parasympathetic under-arousal.  So increasing the parasympathetic (vagus nerve) tone is desirable.

  

Verapamil, Allergies and Asthma

Pollen allergies are a common trigger for asthma, and since every year many people die from asthma, the underlying science is well researched/understood.

Mast cell tryptase potentiates histamine-induced

contraction in human sensitized bronchus

  

Discussion

This study has demonstrated, for the first time, that mast cell tryptase potentiates the contractile response to histamine in human isolated airways. Moreover, this potentiation occurs only in tissues derived from patients whose bronchi exhibit a contractile response to antigen, i.e. which are sensitized. The potentiation was not observed in nonsensitized tissue. The mechanism underlying the tryptase-induced potentiation is related to Ca2+ flux through voltage-dependent channels, since it was inhibited by verapamil.

Inhibition of rat mast cell degranulation by verapamil.

Abstract

Calcium antagonists, e.g. verapamil, prevent exercise-induced asthma. This protective effect may proceed from inhibition of contraction of bronchial smooth muscle, release of mediators by primary effector cells, e.g. mast cells, or both. Therefore, we studied the inhibitory effect of increasing concentrations of verapamil on both in vitro antigen-induced degranulation and ionophore A23187-induced release of labelled serotonin by rat peritoneal mast cells. There was a dose-dependent inhibition by verapamil of both ovalbumin-induced degranulation of mast cells passively sensitized by incubation with mice IgE-rich serum and ionophore-induced release of tritiated serotonin by mast cells previously incubated with (3H)-5HT; the 50% inhibiting concentration was 1.4 X 10(-4) mol I-1 and 5.2 X 10(-5) mol I-1, respectively. An attractive explanation of our results is that verapamil inhibits the antigen-induced release of mediators by mast cells through its calcium antagonist effect. Our results also suggest that the preventing effect of calcium antagonists on asthma may be multi-factorial since other authors have clearly shown that these drugs inhibit contraction of guinea-pig tracheal smooth muscle in vitro.

COMPARATIVE STUDY OF AZELASTINE AND VERAPAMIL IN THE MODIFICATION OF OVALBUMIN SENSITIZED LUNGPARENCHYMAL TISSUES OF GUINEA PIGS IN VITRO

The inhibition of mediator released by Azelastine may help to explain their protective action in anaphylaxis. Our observations are in agreement that Azelastine exerts inhibitory effect on synthesis and release of chemical mediators from mast cell (Chand et al., 1983), including the leukotrienes (Hamasaki et al., 1996).

 Azelastine is a second-generation antihistamine approved for treatment ofallergic conditions. This randomized, double-blind, placebo- and active-controlled, parallel group clinical trial evaluated the efficacy and safety of Azelastine in patients with moderate to-severe seasonal allergic conditions (Shah et al., 2009).  Reussi et al. (1980) have demonstrated the inhibition of release of chemical mediators from mast cells by Ca++ channel blocker in animals in vivo and demonstrate the inhibition of antigen-induced brocho-constriction by Verapamil in sheep, allergic to ascaris sum antigen but Verapamil failed to block in the same non-sensitized animal. It is speculated that calcium channel blocker protect against the allergic broncho-constriction predominantly by preventing the release of chemical mediators from the mast cells.

Fig. 2. Graph shows dose dependent inhibitory effect of Azelastine and Verapamil with the treatment of EC50 ovalbumin. Line in the box indicates the ovalbumin EC50 induced contraction (Control). Each point represent mean of six observationsSyed Saud Hasan et al. 49  On the other hand Henderson et al. (1983) found significant inhibition of allergic response with Nifedipine and Lee at al. (1983) also supported the finding, which observed inhibition of mediator release from human lung in vitro by Verapamil.

   Verapamil in concentration 10-10 g/ml did not exhibit any inhibition but as the concentration increases to 10-9 g/ml showed marked inhibition in contractile effect of ovalbumin EC50 (0.3x10-6). Further increases in concentration of Verapamil i.e. 10-8 g/ml completely antagonized the ovalbumin induced contraction. Azelastine in concentration of 10-9 g/ml (1ng/ml) did not exhibit any inhibition as the concentration increase to 10-8 g/ml showed mark inhibition i.e. 20% contraction to EC50 (0.3x10-6) ovalbumin, when compared before treatment with Azelastine and the concentration 10-7 g/ml antagonized the effect of EC50 (Table and Figure 2).

CONCLUSION It can be inferred from the observations that response produced by antigen can be controlled better with Verapamil than Azelastine and emerging with similar activity regardless of exact mechanism involved.

Verapamil and the IL-6 Gene

Calcium Channel Blockers Activate the Interleukin-6 Gene

Via the Transcription Factors NF-IL6 and NF-kB in

Primary Human Vascular Smooth Muscle Cells

Conclusions—The results demonstrate that CCB of all 3 subclasses are capable of activating NF-IL6 and NF-kB. CCB may thus directly regulate cellular functions by affecting the activity of transcription factors independent of changes of intracellular calcium concentrations, an observation that is of interest considering the biological effects induced by CCB.

A major result of our investigations is the discovery of the activation of  transcription factors resulting from CCB treatment. In general, CCB are postulated to exert their biological effects by decreasing the intracellular concentration of calcium ions.1–4 Experimentally, this effect is usually achieved at micromolar concentrations of the drugs. However, accumulating evidence suggests that CCB, used at therapeutically effective doses (ie, at the nanomolar range), activate calcium in dependent signal transduction pathway(s) altering gene expression.14–17 Here, we show that CCB directly activate the transcription factors NF-IL6 and NF-kB in human VSMC, independent of intracellular calcium levels. This is supported by the existence of multiple regulatory regions within the intracellular part of the L-type calcium channel. It remains to be investigated, however, along which signal transduction pathway this action of CCB occurs.

Verapamil and the Vagus Nerve

Two of the most popular subjects on this blog are “autism and allergies” and “autism and the vagus nerve”.

The vagus nerve connects many parts of the body and seems to be a conduit for inflammatory signaling within the body.  It is deeply involved the process leading to arthritis and epilepsy; by stimulating this nerve with electrical signals, both epilepsy and arthritis can be reduced markedly in certain people.  It is often suggested that the GI problems in many autistic people and linked to aberrant behaviors via the vagus nerve, what some call the “gut brain connection”.

To understand what is going on and why is does affect autism we need to introduce something new, the autonomic nervous system.  For those who already know about this, the interesting finding is that:-

Verapamil alters the balance between parts of the autonomic nervous system's function  with a shift toward decreased sympathetic tone and increased parasympathetic (vagus nerve) tone.

The source of this statement is:

Verapamil as Therapy for Children and Young Adults With Dravet Syndrome

and their sources were:-

Lefrandt JD, Heitmann J, Sevre K, Castellano M, Hausberg M, Fallon M, Fluckiger L, Urbigkeit A, Rostrup M, Agabiti-Rosei E, Rahn KH, Murphy M, Zannad F, de Kam PJ, van Roon AM, Smit AJ. The effects of dihydropyridine and phenylalkylamine calcium antagonist classes on autonomic function in hypertension: the VAMPHYRE study. Am J Hypertens. 2001 Nov;14(11 Pt 1):1083-9.

Petretta M, Canonico V, Madrid A, Mickiewicz M, Spinelli L, Marciano F, Vetrano A, Signorini A, Bonaduce D. Comparison of verapamil versus felodipine on heart rate variability in hypertensive patients. J Hypertens. 1999 May;17(5):707-13.

Forslund L, Björkander I, Ericson M, Held C, Kahan T, Rehnqvist N, Hjemdahl P. Prognostic implications of autonomic function assessed by analyses of catecholamines and heart rate variability in stable angina pectoris. Heart. 2002 May;87(5):415-22.

We learned in an earlier post about autism and the Vagus Nerve that it seems to link many strange things in autism.

We learned from Professor Porges that, for example, the neural mechanism for making eye contact is shared with those needed to listen to the human voice; people with autism struggle with both.  Anything that can “wake up” the vagus nerve system could be interesting.

  

The vagus: A mediator of behavioural and visceral features associated with autism 

In the complicated science we will see that the vagus nerve is also called the parasympathetic nervous system.  The paper below shows how this parasympathetic (Vagus) system is out of balance with the opposing sympathetic nervous system, this then leads to anxiety commonly found in autism.

Investigating the Autonomic Nervous System Response to Anxiety in Children with Autism Spectrum Disorders

Assessment of anxiety symptoms in autism spectrum disorders (ASD) is a challenging task due to the symptom overlap between the two conditions as well as the difficulties in communication and awareness of emotions in ASD. This motivates the development of a physiological marker of anxiety in ASD that is independent of language and does not require observation of overt behaviour. In this study, we investigated the feasibility of using indicators of autonomic nervous system (ANS) activity for this purpose. Specially, the objectives of the study were to 1) examine whether or not anxiety causes significant measurable changes in indicators of ANS in an ASD population, and 2) characterize the pattern of these changes in ASD. We measured three physiological indicators of the autonomic nervous system response (heart rate, electrodermal activity, and skin temperature) during a baseline (movie watching) and anxiety condition (Stroop task) in a sample of typically developing children (n = 17) and children with ASD (n = 12). The anxiety condition caused significant changes in heart rate and electrodermal activity in both groups, however, a differential pattern of response was found between the two groups. In particular, the ASD group showed elevated heart rate during both baseline and anxiety conditions. Elevated and blunted phasic electrodermal activity were found in the ASD group during baseline and anxiety conditions, respectively. Finally, the ASD group did not show the typical decrease in skin temperature in response to anxiety. These results suggest that 1) signals of the autonomic nervous system may be used as indicators of anxiety in children with ASD, and 2) ASD may be associated with an atypical autonomic response to anxiety that is most consistent with sympathetic over-arousal and parasympathetic under-arousal.

The following explanation of the Autonomic Nervous System is edited from Wikipedia.

Autonomic Nervous System (ANS)

The autonomic nervous system (ANS) is the part of the peripheral nervous system that acts as a control system that functions largely below the level of consciousness to control functions,^] including heart rate, digestion, respiratory rate, salivation, perspiration, pupillary dilation, micturition (urination), sexual arousal, breathing and swallowing. Most autonomous functions are involuntary but they can often work in conjunction with the somatic nervous system which provides voluntary control.

The ANS is divided into three main sub-systems:

1. parasympathetic nervous system (PSNS)

PSNS is often considered the "rest and digest" or "feed and breed" system

2. sympathetic nervous system (SNS),

SNS is often considered the "fight or flight" system

 3.enteric nervous system (ENS).

ENS consists of a mesh-like system of neurons that governs the function of the gastrointestinal system

Depending on the circumstances, these sub-systems may operate independently of each other or interact co-operatively.

In many cases, PSNS and SNS have "opposite" actions where one system activates a physiological response and the other inhibits it. The modern characterization is that the sympathetic nervous system is a quick response mobilizing system and the parasympathetic is a more slowly activated dampening system.

In general, ANS functions can be divided into sensory (afferent) and motor (efferent) subsystems. Within both, there are inhibitory and excitatory synapses between neurons. Relatively recently, a third subsystem of neurons that have been named 'non-adrenergic and non-cholinergic' neurons (because they use nitric oxide as a neurotransmitter) have been described and found to be integral in autonomic function, in particular in the gut and the lungs

Neurotransmitters and pharmacology

At the effector organs, sympathetic ganglionic neurons release noradrenaline (norepinephrine), along with other cotransmitters such as ATP, to act on adrenergic receptors, with the exception of the sweat glands and the adrenal medulla:

• Acetylcholine is the preganglionic neurotransmitter for both divisions of the ANS, as well as the postganglionic neurotransmitter of parasympathetic neurons.
• Nerves that release acetylcholine are said to be cholinergic. In the parasympathetic system, ganglionic neurons use acetylcholine as a neurotransmitter to stimulate muscarinic receptors.
• At the adrenal medulla, there is no postsynaptic neuron. Instead the presynaptic neuron releases acetylcholine to act on nicotinic receptors. Stimulation of the adrenal medulla releases adrenaline (epinephrine) into the bloodstream, which acts on adrenoceptors, producing a widespread increase in sympathetic activity.

 Circulatory system

Heart

Target	Sympathetic (adrenergic)	Parasympathetic (muscarinic)
cardiac output	β1, (β2): increases	M2: decreases

Other

Target	Sympathetic (adrenergic)	Parasympathetic (muscarinic)
platelets	α2: aggregates	---
mast cells - histamine	β2: inhibits

Endocrine system

Target	Sympathetic (adrenergic)	Parasympathetic (muscarinic)
pancreas (islets)	α2: decreases insulin secretion from beta cells, increases glucagon secretion from alpha cells	M3:[ increases secretion of both insulin and glucagon.[16][17]
adrenal medulla	N (nicotinic ACh receptor): secretes epinephrine and norepinephrine

Nerve "Wiring Diagram"

The PSNS (parasympathetic nerve system) is wired together via the Vagus Nerve

The SNS (sympathetic nerve system) is wired together via the splanchnic nerves.

Autonomic nervous system, showing splanchnic nerves in middle, and the vagus nerve as "X" in blue. The heart and organs below in list to right are regarded as viscera.

The viscera are mainly innervated parasympathetically by the vagus nerve and sympathetically by the splanchnic nerves.

Conclusion

For those of you that made it this far, here are my conclusions.

People who have autism and any kind of allergy, be it pollen, food intolerance, asthma or anything similar, might consider asking their doctor to let them trial a very low dose of Verapamil for a couple of days.  The effect is almost instant and so there is no point trialing it for weeks.  Verapamil will lower your blood pressure, in a dose dependent fashion.  The effective autism dose for a severe allergy case is about 1mg/kg.  The half-life varies person to person, so you might need two doses a day, or you might need three.

If you know an adult with severe asthma, look hard and you may see some very mild signs of autism (need for order, anxiety, lack of flexibility etc).

It appears that in all these cases, the gene CACNA1C is misbehaving to varying degrees in different parts of the body.  This gene produces the calcium channel Cav1.2.

You could check if you have the mutated gene, but I do not see the point.  It would only tell you what might happen.  To know what actually has happened, you would need to use proteomics. 

This emerging science will ultimately be able to provide biomarkers for neurological conditions like autism, depression, bipolar etc, so that the neurologist will know, with certainly, what specific dysfunctions each individual person has.  At that point, behavioral assessments and psychiatry will finally be consigned to history and people will get “smart drugs”, to treat precisely diagnosed neurological dysfunctions.

Mastocytosis Mistaken for Aspergers

One of the features I have in this blog is that I get to see what search terms people use to find this site.  Sometimes these search terms tell you some very interesting things.

Here is one such interesting search, somebody used today:-

    mastocytosis mistaken for aspergers

Even though I expect 90+% visitors to this blog are interested in more severe types of ASD than Asperger's, much here is likely to be applicable to some people with Asperger's.

There are several posts in this blog about the role of mast cells and how allergies cause them to degranulate.  In some people mast cell degranulation actually leads to pain.  Some people have an over-expression of mast cells, this is called Mastocytosis.

I made by own theory about seasonal autism flare-ups and mast cells, which I called Seasonal Autistic Mastocytosis.

Now we know that at least one person thinks their mastocytosis was mistaken for Asperger's. 




 

The over-activated Immune System in Autism or “why has NAC stopped working?”

 Organs of the Immune System

 Today’s post will combine some first class science from MGH (Massachusetts General Hospital) with some feedback that I have been receiving.

I have been receiving comments from parents who have tried some of the various new scientifically-based drug therapies for autism.  For some parents, none of them work.  This is not a surprise, since we have established that “autism” is just a general term for a collection of behavioral symptoms.  These symptoms can be caused by a remarkable variety of different factors and so a therapy can only be successful, if it is matched to the appropriate subject.  The lack of biomarkers currently makes it a case of trial and error.

What really draws my attention is when a successful therapy appears to “stop working”.  This has already happened to my son and it just happened to a reader of this blog; “NAC has stopped working”.

So I applied myself to figuring this out.  In fact, it is quite simple.  Here again we can learn from the comorbidities.  Asthma is another, sometimes nasty, auto-immune inflammatory condition.  Asthma often has flare-ups, but they are often quite predictable - icy cold air in winter and pollen in summer.  Most asthma sufferers in developed countries are very well cared for, and their medication is varied according to the magnitude of their symptoms.  A severe asthma attack may result in a visit to the nearest hospital and treatment with potent steroids, but the science is well understood.

When well-targeted, the current autism drugs can work reasonably well in treating the autism of “stable” subjects; just as a low dose of inhaled corticosteroid usually controls my son’s asthma.  However, when an external factor comes along and over activates the immune system, the medication is overwhelmed.  In asthma you would hear wheezing and have to make frequent use of a “rescue” inhaler like Ventolin and if that was overwhelmed, it would be a case of a nebulizer or an oral steroid, at home, or in hospital.

Unfortunately, you cannot call your doctor and say “my autism drug has stopped working”; he would not believe it worked in the first place.

Having been able to treat autism, it is quite a shock to see all those gains evaporate.  Fortunately, help is at hand in the scientific literature.  In the case of Monty, aged 10 with ASD, the problem was caused by something as simple as pollen.  The pollen triggered the “degranulation” of so-called mast cells that released histamine, serotonin and a whole host of inflammatory cytokines into the blood.  This results in the immune system being in a state of “over-activation”.  This takes the body back to the days in which such over-activation caused the damage that led to the child’s autism.

If I had the resources of the Massachusetts General Hospital (MGH), I would simply establish a base-line of inflammatory markers, like IL-6, for each subject; then, when the subject’s drugs “stopped working” I would measure them again.

Having recently come across a clever Italian called Alessio Fasano, a doctor specialized in Celiac Disease at MGH; I would also test serum Zonulin levels.  Now, Zonulin may sound like something out of Star Trek, and it has only a tiny entry in Wikipedia, but it is possibly the holy grail for those involved in the Gluten and Casein free diet.

Zonulin is a protein that controls the permeability of the gut (digestive tract).  It is also measurable and is indeed a very good indicator of who has a “leaky gut”.  According to Fasano, a leaky gut is a precondition for autism.  No leaky gut, no autism possible.

Now you might be thinking that this talk of leaky guts will then lead me to make crazy claims linking the gut to the brain and then to autism.  Well I am not going to make any such claims; I will leave the highly respected doctor from MGH to do that for me.

There are two videos.  The autism one is over an hour long, but is only a couple of weeks old.  The alternative film is much shorter, but is talking more generally about auto immune diseases.
 

Gut-brain interaction in Autism Spectrum Disorder

Then click on the film that looks like this:-

 

Or the short film:-

Unlocking the Connection Between Intestinal Permeability and Autoimmune Disease

 

Conclusion

This is all very interesting and clearly permeability of the gut looks like a big factor in some people’s day-to-day autism.  It may very well also be a factor in those “flare-ups”, which cause the immune system to “cancel out” the effects of otherwise effective autism drugs.  You may have noted in some of the more shocking autism news stories, that can even end in murder/suicide, ulcerative colitis had developed in the intestines of the autistic person, leading to a severe deterioration in behaviour, that then became unbearable for the carers.

Dr Fasano is a gastroenterologist and so has a lot to tell us about the gut, but some other areas are also involved. We also have the leaky blood brain barrier, a factor in other diseases like MS; a biomarker for that would also be handy.  We also have all the work on mast cell degranulation from Theoharides.  It just has to be fitted together.

So my advice to anyone whose “NAC has stopped working” is to look at what has re-activated your child’s immune system.  It might be Seasonal Autistic Mastocytosis, but it might very well be a related to Fasano’s leaky gut or at the extreme, some kind of colitis (Dr W’s autistic enterocolitis, perhaps).

Perhaps some of those children who do not respond to any of the current autism drugs are in a chronic state of immune system over-activation.  For them, no drug can help, unless the immune system is first re-set. (pass the prednisone or even some TSO; more on immunomodulation here)

 

 

Autism Flare-ups - News on Allergy Drugs

I wrote earlier posts about the role of histamine in summertime autism flare-ups.  I ended up using a combination of a regular antihistamine like Claritin with Ketotifen, which though also an antihistamine, is a partial mast cell stabilizer.
 

I recently found a very useful table which shows different regimens that can be used for just this problem:-

 

The table is from a paper, again by Dr Theoharides, called:
 Autism: an emerging ‘neuroimmune disorder’ in search of therapy

Rupatadine is a safe and cheap antihistamine mainly sold in Europe.  The science appears to show that it is more effective at stabilizing the mast cells involved in allergies than Ketotifen.

The problem I found with Ketotifen is that it has very little immediate effect, unlike Claritin, so I ended up using both.  By the looks of things, Rupatadine may indeed do the job of both.

The table also mentions Periactin, which is an old first generation antihistamine.  It has a secondary antiserotonergic properties.  It was trialed in Iran for autism, apparently with some success.

Cyproheptadine in the treatment of autistic disorder: a double-blindplacebo-controlled trial.

 

Conclusion

Not all antihistamines are the same and some have very interesting secondary effects.  It looks like science has given up on investigating this further, which is a pity; but you don't have to.