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The power of your gut

Fibromyalgia: reliable diagnosis soon possible thanks to the microbiota?

Fibromyalgie
The gut microbiota

Because there are no reliable methods for diagnosing fibromyalgia, sufferers face a long, hard – and painful – battle. However, recent research1 has raised hopes for the possible development of a simple test, such as a blood test.

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This article is based on scientific information

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Photo: Fibromyalgie : bientôt un diagnostic fiable grâce au microbiote ?

About this article

Created 14 October 2022
Updated 25 October 2022

A recent article may put an end to misdiagnosis for thousands of women suffering from fibromyalgia, a disease characterized by chronic diffuse pain combined with intense fatigue and various issues, including sleep and mood disorders. There are no “markers” for making a diagnosis, such as a lesion in the body (unlike a fracture of the tibia, confirmed via a simple X-ray) or a laboratory parameter (unlike blood sugar levels, which indicate diabetes). This directly affects the quality of life of fibromyalgia patients.

Fibromyalgia: an almost exclusively female disease

Although it affects mainly women, fibromyalgia also concerns men, in a 9:1 ratio.2

Fibromyalgia: focus on 5 bacteria

New research may mark a turning point. Starting point: studying the differences between the gut microbiota compositions of 42 fibromyalgia patients and 42 other healthy women. Result: of the 16 various bacterial families present in the women with fibromyalgia, three were low while two others seemed quite high. Now, these 5 bacterial species have one thing in common: they transform molecules called primary (sidenote: Bile acids Bile acids facilitate digestion and absorption of lipids in the intestine. They also exercise hormonal functions and are involved in various metabolic processes. The gut microbiota will modify the bile acids. In return the various bile acids will have an impact on its composition. Staels B, Fonseca VA. Bile acids and metabolic regulation: mechanisms and clinical responses to bile acid sequestration. Diabetes Care. 2009;32 Suppl 2(Suppl 2):S237-S245.  Li R, Andreu-Sánchez S, Kuipers F, Fu J. Gut microbiome and bile acids in obesity-related diseases. Best Pract Res Clin Endocrinol Metab. 2021;35(3):101493.  ) into secondary bile acids (SBA).

0.2 to 6.6% of the adult population may be affected by fibromyalgia.

Sources

Furthermore, the authors observed differences in the concentrations of certain SBAs in the blood of patients suffering from fibromyalgia – e.g., α-muricholic acid levels were on average 5 times lower in women with this condition! In addition, the lower the α-muricholic acid levels, the greater the pain, fatigue and symptom severity scores. In short, there is a link between an intestinal imbalance and the blood levels of a specific bile acid, which are in turn associated with symptom severity in patients with fibromyalgia.

Fibromyalgia is not...

Diagnosis of fibromyalgia is complex, as the symptoms (pain, fatigue, sleep disorders, etc.) can be similar to those experienced with other diseases3. It can therefore be confused with:

  • Migraines
  • Irritable bowel syndrome
  • Chronic fatigue syndrome

So can we expect a diagnostic test in the near future?

As a direct consequence of these observations, it may be possible to simply measure the concentration of these small acids, by means of a blood test, to accurately detect people suffering from fibromyalgia. This would enable us to objectify diagnosis of this disease. The model developed by the authors seems promising, showing accuracy of 91.7%. This is enough to raise hopes of a reliable diagnosis becoming available in the future, putting an end to the ordeal for thousands of women.

The gut microbiota

Find out more
Sources

1. Minerbi A, Gonzalez E, Brereton N et al. Altered serum bile acid profile in fibromyalgia is associated with specific gut microbiome changes and symptom severity. Pain. 2022 May 19.

2. Yunus MB. The role of gender in fibromyalgia syndrome. Curr Rheumatol Rep. 2001 Apr;3(2):128-34.

3. Goldenberg DL. Diagnosis and differential diagnosis of fibromyalgia. Am J Med. 2009 Dec;122(12 Suppl):S14-21.

Tags
Fibromyalgia Diagnosis Fatigue Sleep Pain Chronic pain Dysbiosis Chronic fatigue Sleep disorder Gut microbiota

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