Ozone affects pollen allergens: at ozone levels typical of photochemical smog, more allergens are formed in pollen. This connection has been demonstrated in the rye plant and is now being published in the prestigious Journal of Allergy Clinical Immunology. The project funded by the Austrian Science Fund FWF shows that elevated ozone levels during maturation increase the protein and allergen contents of rye pollen. This points to a relationship between current environmental problems due to climate change and the rise in allergies.

It’s on everyone’s lips, especially during the summer months when photochemical smog engulfs the world’s cities. Environmental pollution and climate change both contribute to the increasingly frequent incidences observed. While this is a major health problem in itself, there are now indications that elevated ozone levels also raise the allergen content of pollen. A team from the Medical University of Vienna and the Austrian Institute of Technology have investigated the reasons for this phenomenon.

Ozone Stimulates Rye

The team behind project leader Prof. Rudolf Valenta of the Centre for Pathophysiology, Infectiology and Immunology at the Medical University of Vienna cultivated two different rye cultivars under controlled environmental conditions. One group of plants was exposed to elevated ozone concentrations (79 parts per billion) for part of the time. This value is more than three times the normal ozone concentration at ground level, i.e. 22 ppb, and corresponds to the health-endangering peak values that occur on hot days in Vienna. A control group was grown at normal ozone levels for subsequent comparison with the high-ozone group.

When the pollen was mature, it was harvested and collected for further study. It yielded very convincing results, as Prof. Valenta explains: “First, we were able to show that the higher ozone concentrations led to a marked elevation of the protein content in both cultivars. Further analysis showed that allergens of groups 1, 5 and 6 contribute to this increase, as does another allergen, profilin. Even in the second rye cultivar, increased ozone exposure during pollen maturation led to a sharp rise in group 1 allergens and profilin.”

Allergen = Allergy?

This result alone would seem to show that higher ozone levels can increase the allergic potential of certain grasses. However, “more allergens” does not necessarily translate to “more allergies”. It was clear to Prof. Valenta and his team that potential allergens are not always recognized by the immune system and therefore do not always give rise to allergies. “A study from 2007 shows that ozone can actually decrease the allergenicity of rye allergens,” comments Prof. Valenta. “So there may be more allergens, as our work shows, but whether these would react with human IgE antibodies and cause actual allergies was not clear.”

However, another experiment soon provided a clear answer to this question: protein extracts from both rye cultivars were incubated with IgE antibodies from allergic patients. The results showed that the protein extracts from ozone-stressed plants reacted more strongly with the IgE antibodies, which are involved in allergic reactions, than those of the control plants, meaning that the former are more allergenic.

Consequently, the team around Prof. Valenta, Dr. Thomas Reichenauer and Prof. Verena Niederberger, managed to demonstrate in this FWF-funded project in a well controlled set of experiments that environmental problems such as rising ozone concentrations at ground level may bear some of the responsibility for the constant increase in allergic disorders in our society in recent years.

References:

VWF, Allergies through Ozone Effects? Ozone Increases Allergen Load, Vienna, 23.08.2010

Original publication: Exposure of rye (Secale cereale) cultivars to elevated ozone levels increases the allergen content in pollen, J. Eckl-Dorna, B. Klein, T.G. Reichenauer, V. Niederberger, R. Valenta, J Allergy Clin Immunol. doi:10.1016/j.jaci.2010.06.012

Photo: Monika Grote

There is a connection between fibromyalgia and MCS confirmed by studies. Patients suffering with fibromyalgia (FM) have reported frequent complaints which are outside of their problem area of the musculoskeletal system, and chemically sensitive patients, in addition to their reactions to low doses of chemicals, repeatedly experience pain in different body regions. Fibromyalgia is commonly regarded as an atypical soft-tissue rheumatism. The diagnosis is made mainly by an examination of 18 pressure sensitive parts of the body, called tender points. Scientists from Scandinavia reported more than ten years ago that there is an overlap between MCS and fibromyalgia, which has major relevance for the medical diagnosis for patients. A recent Canadian study in February 2010 confirmed this result. The authors of this study, in a medical journal, appealed for adequate education and specific related information in the health field and to the public in order to improve the prognosis for patients.

Pain on pain

Patients with fibromyalgia or chemical sensitivity often experience pain which they describe as a “toothache all over the body.” Scientists from Scandinavia reported in the late nineties of the existing relationship between these two diseases.

What exists for fibromyalgia patients also exists for MCS patients?

The objective of a pilot university rheumatology study was to determine how often MCS occurs in patients with Fibromyalgia. The research team designed a questionnaire decided whether the patients indeed also had MCS. The physicians used criteria from a new study by using an immunological profile of patients who could be identified with this disease. Patients responded with a yes or no response to confirm the presence of 48 FM-related symptoms. (1)

Study finds link between MCS and FMS

The results of the study were published in the first half of 1997 in the medical journal, “Scandinavian Journal of Rheumatology.” Thirty-three of the 60 patients with fibromyalgia fulfilled the criteria for MCS. Eleven of those patients met more restrictive criteria, which demonstrated the high severity of chemical sensitivity. In addition, scientists found that the sensitivity symptoms and reactions of the triggering substances that were most frequently cited by the FM patients were similar to those reported by MCS patients in other studies. A chemical sensitivity existed in more than half the patients with fibromyalgia, thus the Scandinavian researchers concluded that MCS may be an additional symptom in the complex spectrum of fibromyalgia.

Canadian study confirmed the simultaneous existence of MCS and FMS

The fact that both conditions exist simultaneously has been affirmed by studies in recent years. The targeted diagnosis should be considered because of the potentially dramatic effects on the sufferers of MCS and FMS. This was evident in a study of the environmental clinic (EHC) in Toronto. The Canadian researchers studied 128 patients for the presence of MCS, CFS, and FMS, and identified the impacts in their everyday lives. Eight of the 70 patients received the MCS, CFS, or FM diagnosis, while the remaining patients had two or three overlapping diagnoses. What a great impact in the study of environmental disease for patients and readers of the magazine for Canadian GP, in the February 2010 edition. Most of the study participants (68%) had to leave work, on the average of three years after the onset of their symptoms due to their illness. (2)

Relevance for the diagnosis of environmental and mainstream medicine

The studies of 1997 and early 2010 reveal that medical practices must take a thorough medical history of the patient and make an appropriate diagnosis at the onset of one of these two diseases of FM or MCS. After the clinical results indicate a patient has MCS, then there needs to be a clarification whether or not the patient also has fibromyalgia. This can be detected with little effort by any doctor by checking the 18 tender points. At the same time, fibromyalgia patients must be asked about a hypersensitivity to chemicals which is likely, despite the lack of the study results being integrated into mainstream medicine over the last ten years. It is extremely important for rheumatologists to be familiar with the diagnosis of MCS for their FM patients. The prognosis for fibromyalgia patients significant improvement could be then specifically targeted with treatments and appropriate prevention strategies which deal with the triggering affects of chemicals.

Author: Silvia K. Müller, CSN – Chemical Sensitivity Network, August 2010

Translation: Thank you to Christi Howarth.

Related articles:

• New Criteria Proposed for Diagnosing Fibromyalgia
• Unanimous Vote for Research Center for MCS, CFS, FMS, GWS in New Jersey
• Research on Multiple Chemical Sensitivity (MCS)
• Fibromyalgia Patients Show Decreases In Gray Matter Intensity

Berkeley — Children who were exposed to organophosphate pesticides while still in their mother’s womb were more likely to develop attention disorders (ADHD) years later, according to a new study by researchers at the University of California, Berkeley.

The new findings, to be published Aug. 19 in the journal Environmental Health Perspectives (EHP), are the first to examine the influence of prenatal organophosphate exposure on the later development of attention problems. The researchers found that prenatal levels of organophosphate metabolites were significantly linked to attention problems at age 5, with the effects apparently stronger among boys.

Earlier this year, a different study by researchers at Harvard University associated greater exposure to organophosphate pesticides in school-aged children with higher rates of attention deficit hyperactivity disorder (ADHD) symptoms.

“These studies provide a growing body of evidence that organophosphate pesticide exposure can impact human neurodevelopment, particularly among children,” said the study’s principal investigator, Brenda Eskenazi, UC Berkeley professor of epidemiology and of maternal and child health. “We were especially interested in prenatal exposure because that is the period when a baby’s nervous system is developing the most.”

The study follows more than 300 children participating in the Center for the Health Assessment of Mothers and Children of Salinas (CHAMACOS), a longitudinal study led by Eskenazi that examines environmental exposures and reproductive health. Because the mothers and children in the study are Mexican-Americans living in an agricultural community, their exposure to pesticides is likely higher and more chronic, on average, than that of the general U.S. population.

Yet, the researchers pointed out that the pesticides they examined are widely used, and that the results from this study are a red flag that warrants precautionary measures.

“It’s known that food is a significant source of pesticide exposure among the general population,” said Eskenazi. “I would recommend thoroughly washing fruits and vegetables before eating them, especially if you’re pregnant.”

Organophosphate pesticides act by disrupting neurotransmitters, particularly acetylcholine, which plays an important role in sustaining attention and short-term memory.

“Given that these compounds are designed to attack the nervous system of organisms, there is reason to be cautious, especially in situations where exposure may coincide with critical periods of fetal and child development,” said study lead author Amy Marks, who was an analyst at UC Berkeley’s School of Public Health at the time of the study.

Many of these same UC Berkeley researchers are also finding that children with certain genetic traits may be at greater risk, a finding that is being published the same day in a separate EHP paper. That study found that 2-year-olds with lower levels of paraoxonase 1 (PON1), an enzyme that breaks down the toxic metabolites of organophosphate pesticides, had more neurodevelopmental delays than those with higher levels of the enzyme. The authors suggest that people with certain PON1 genotypes could be particularly vulnerable to pesticide exposure.

In the study on attention problems, researchers tested for six metabolites of organophosphate pesticides in mothers twice during pregnancy and in the children several times after birth. Together, the metabolites represent the breakdown products of about 80 percent of all the organophosphate pesticides used in the Salinas Valley.

The researchers then evaluated the children at age 3.5 and 5 years for symptoms of attention disorders and ADHD using maternal reports of child behavior, performance on standardized computer tests, and behavior ratings from examiners. They controlled for potentially confounding factors such as birthweight, lead exposure and breastfeeding.

Each tenfold increase in prenatal pesticide metabolites was linked to having five times the odds of scoring high on the computerized tests at age 5, suggesting a greater likelihood of a child having clinical ADHD. The effect appeared to be stronger for boys than for girls.

While a positive link between prenatal pesticide exposure and attention problems was seen for 3.5-year-olds, it was not statistically significant, a finding that did not surprise the researchers.

“Symptoms of attention disorders are harder to recognize in toddlers, since kids at that age are not expected to sit down for significant lengths of time,” said Marks. “Diagnoses of ADHD often occur after a child enters school.”

The UC Berkeley researchers are continuing to follow the children in the CHAMACOS study as they get older, and expect to present more results in the years to come.

The findings add to the list of chemical assaults that have been linked to ADHD in recent years. In addition to pesticides, studies have found associations with exposure to lead and to phthalates, which are commonly used in toys and plastics.

“High levels of the symptoms of ADHD by age 5 are a major contributor to learning and achievement problems in school, accidental injuries at home and in the neighborhood, and a host of problems in peer relationships and other essential competencies,” said UC Berkeley psychology professor Stephen Hinshaw, one of the country’s leading experts on ADHD, who was not part of this study. “Finding preventable risk factors is therefore a major public health concern.”

Literature: University of California – Berkeley, Prenatal exposure to pesticides linked to attention problems, 19-Aug-2010.

Related Articles:

• Pesticides in kids linked to ADHD- Attention-Deficit/Hyperactivity Disorder, study finds
• Western Diet linked to ADHD
• Groups Seeking Ban on Organophosphate Pesticide Go to Federal Court
• Common household pesticides linked to childhood cancer cases in Washington area
• Anxiety in adult female mice following perinatal exposure to Chlorpyrifos

In January 2006, at the initiative of the Ministry of the Environment, a Research Centre for Chemical Sensitivities was founded in Denmark. The Center was designed to offer treatments to those with MCS and research fragrance sensitivities in more detail. The initial hope that originally flowed through this center, funded by the Ministry, was to benefit MCS sufferers and to delve into medical science for those affected. Unfortunately this hope has been shattered by recent publications.

The EMM Blog will publish several articles reporting the consequences for MCS sufferers. Environmental health professionals and organizations must be well informed about the events in other countries and it appears that the Danish Research Centre for Chemical Sensitivities is striving to clearly influence the international science of MCS.

The second article of a series entitled, “The Danish MCS Research Centre in the International Field of Vision,” was written by a nurse who is suffering from MCS.

If you missend the first article of the series, read here >>

Mette Toft: MCS – Multiple Chemical Sensitivity: A Report from Denmark

What are the interests within the individual research groups regarding MCS?

Bodil Dam Bak Nielsen – In April 2010, an independent group of Italian scientists (De Luca et al.) published their research results, “Biological definition of multiple chemical sensitivity from redox state and cytokine profiling and not from polymorphisms of xenobiotic-metabolizing enzymes“.(1) The study results have shown that in MCS sufferers, the activity of erythrocyte catalase and GST were lower, whereas Gpx was higher than normal. Both reduced and oxidized glutathione were lower during nitric oxide (NO) / peroxynitrite (ONOO) raised in the MCS group. The fatty acid profile of MCS patients were shifted to the saturated part, and the IFN-gamma, IL-8, IL-10, MCP-1, PDGFbb and VEGF were elevated.

Danish MCS Science Center questions the work of colleagues

In July 2010, the Danish Research Centre for Chemical Sensitivities and Fragrance Sensitivity reported on their website, (which in the opinion of many Danish MCS sufferers is very questionable research, with the main emphasis on mental health):

“Since this is only a single study (De Luca et al.), it is necessary to review the results and pursue new studies before a conclusion can be drawn regarding the importance of immunological factors in fragrance and Chemical Sensitivities”.

“This is why the Danish Research Centre for Chemical Sensitivities plans to examine whether heightened cytokines or inflammatory factors can be detected in those with chemical hypersensitivity – REGARDLESS OF CONTACT ALLERGIES”.

Selective control?

The results of the Italians have not only showed increasing of the messenger interferon (IFN)-gamma, but also point to several metabolic parameters for accelerated lipid oxidation, as well as increased nitric oxide production and reduction of glutathione in combination with elevated inflammatory cytokines, which confirms a biological definition and diagnosis of MCS.

Contact allergy, a diagnosis of exclusion in MCS?

The former head of the Danish Research Centre for Chemical Sensitivities, Jesper Elberling , who is the senior researcher and expert, knows that the messenger interferon (IFN)-gamma plays a role in the development of contact dermatitis because of his work in the dermatology department at Gentofte Hospital. This is the cytokine messenger that the Italians have found in their research in MCS patients. The  Danish Research Centre for Chemical Sensitivities realizes from its own questionnaire that many MCS sufferers also suffer from contact allergies.

Because of this it is important to ask the following questions:

• Is the Danish Research Centre for Chemical Sensitivities, therefore, consciously and deliberately selecting only THIS small part of the research result of the Italians to verify? Shouldn’t ALL research findings be verified before a conclusion can be drawn as to their validity?
• Shouldn’t one of the aims of this planned research study be to look at those MCS sufferers with a contact allergy and not exclude MCS patients with contact allergy to see if the result changes?
• Is the Danish Research Centre for Chemical Sensitivities able to demonstrate that this result (the De Luca A et al. research) can be attributed, according to a large part of the MCS sufferers who participated in the study, must have suffered from contact dermatitis, and that this research can therefore be attributed to this fact?

Will their study results attempt to discredit the Italian research?

Only then the Danish Research Centre for Chemical Sensitivities could thus bring the present research results into disrepute, which would neglect the complete research result of the Italians and cast their research in a bad light.

Why not complete control?

This raises the question of why the Science Center has not decided to check the other research results of the Italian scientists who need to be reviewed well before the Center may consider their findings valid.

Martin Pall’s theory (the fatal NO / ONOO cycle), states that among other things, MCS sufferers experience an increased nitric oxide production, which has indeed been demonstrated by the researchers from Italy. The Danish Research Centre for Chemical Sensitivities cannot refute this research result.

The Italian scientists have shown that, in accordance with Martin Pall’s theory, the vicious biochemical NO / ONOO cycle,three factors decreased compared to the healthy control group. It is odd that the Danish Research Centre for Chemical Sensitivities does not have evidence or the desire to disprove this.

It appears that the Italian doctors did not choose to include contact allergies in their research findings. Naturally, most biochemical substances in the body are influenced by many factors or diseases; therefore, the wish to correlate precisely this factor (interferon (IFN)-gamma) with something that is known to influence it as well (i.e. contact allergies) can be seen as an attempt to create uncertainty around the Italian research results. In this way the entire Italian study, and its results that are so important to MCS sufferers, will be questioned. Is this the intended aim of the Danish Research Centre for Chemical Sensitivities?

We certainly hope not, and hope that independent scientists will begin to verify the accuracy of all the other results, and not only select a single result, in the hopes of being able to refute the validity of the research.

Author: Bodil Dam Bak Nielsen for CSN – Chemical Sensitivity Network, August 2010

Translation: Thank you very much to Christi Howarth!

References:

1. Chiara De Lucaa, Maria G. Scordob, Eleonora Cesareoa, Saveria Pastorea, Serena Mariania, Gianluca Maiania, Andrea Stancatoa, Beatrice Loretic, Giuseppe Valacchid, e, Carla Lubranoc, Desanka Raskovicf, Luigia De Padovac, Giuseppe Genovesic and Liudmila G. Korkinaa, Biological definition of multiple chemical sensitivity from redox state and cytokine profiling and not from polymorphisms of xenobiotic-metabolizing enzymes, doi:10.1016/j.taap. 2010.04.017, Toxicol Appl Pharmacol. 2010 Apr 27
2. Danish Research Centre for Chemical Sensitivities, Italiensk studie sætter fokus på signalstoffer, 18.07,2010

Series: The Danish MCS Research Centre in the International Field of Vision

Part I: MCS – Multiple Chemical Sensitivity: A Report from Denmark

Related articles:

• Predictions of Multiple Chemical Sensitivity Mechanism Confirmed by Roman Study
• MCS – Multiple Chemical Sensitivity – A Disease Caused by Toxic Chemical Exposure
• Research on Multiple Chemical Sensitivity (MCS)
• Unanimous Vote for Research Center for MCS, CFS, FMS, GWS in New Jersey
• Reckless Self-Interest Of The Fragrance Industry

Lack of evidence for antidepressants – Instead of benefit, some evidence of serious harm

Antidepressants commonly prescribed to people with autistic spectrum disorders cannot be recommended based on current evidence, a new study by Cochrane Researchers concludes. Despite some evidence of benefits in adults diagnosed with autism, they say there is no evidence for any benefits associated with selective serotonin reuptake inhibitors (SSRIs) in children, who may suffer serious adverse effects as a result of taking the drugs.

Autistic spectrum disorders are difficult to treat because of the range of symptoms experienced by patients, including difficulties with social interactions and communication. SSRIs are among the most commonly prescribed medications, although none have been specifically approved by any drug authority for use in autism. In the UK, most antidepressants are not approved for children for any condition. The rationale behind the use of SSRIs in autism is that they act on serotonin, the same chemical in the body that is responsible for some of the psychological processes affected by the condition.

The researchers included a total of seven trials, involving 271 patients, in their study. The trials evaluated fluoxetine, fluvoxamine, fenfluramine and citalopram. Overall, the researchers found no benefit in the five trials in children and some evidence of serious harm, including one child who suffered a prolonged seizure after taking citalopram. The two trials in adults were very small and thus, although there was some evidence for improvement in symptoms, the authors concluded there was too little evidence for the drugs to be recommended. A major problem with analysing the results was that all the trials used different measures for assessing the drugs’ effects.

“We can’t recommend SSRIs as treatments for children, or adults, with autism at this time. However, decisions about the use of SSRIs for co-occurring obsessive-compulsive disorder, aggression, anxiety or depression in individuals with autism should be made on a case by case basis,” said lead author Katrina Williams of the School of Women’s and Children’s Health at the University of New South Wales & Sydney Children’s Hospital in Sydney, Australia.

“Not all the SSRIs currently in use have undergone controlled trials for autistic spectrum disorders, but parents are often anxious to try treatments regardless of the lack of evidence. It’s important that doctors are open about the lack of evidence, and explain any risks fully, before prescribing these treatments.”

Reference: Wiley-Blackwell, Autism: Lack of evidence for antidepressants, August 7, 2010

Related Articles:

1. Antidepressants Offer No Relief for Repetitive Behaviors in Children with Autism
2. Children with Autism show slower pupil responses, study finds
3. Autism – Do terbutaline- and mold-associated impairments of the brain and lung relate to autism?
4. Neuroimaging: New insights in the pathophysiological mechanisms of Autism
5. A prospective study of prenatal mercury exposure from maternal dental amalgams and autism severity