Main > MEDICINE > Muscle. Muscular > Dysfunction > Involuntary Dysfunction > Treat. > Relaxin Hormone

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PATENT NUMBER This data is not available for free
PATENT GRANT DATE 11.04.00
PATENT TITLE Method of collagen therapy using relaxin

PATENT ABSTRACT A method of treating involuntary muscle dysfunctions includes administering a therapeuticaly effective amount of relaxin to a patient. Involuntary muscle dysfunctions amenable to treatment with relaxin include fibromyalgia, myofascial pain syndrome, chronic fatigue syndrome, dystonia, pelvic floor dysfunction, irritable bowel syndrome, and others
PATENT INVENTORS This data is not available for free
PATENT FILE DATE 19.11.98
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PATENT PARENT CASE TEXT This data is not available for free
PATENT CLAIMS What is claimed is:

1. A method for remodelling collagen fibers, comprising applying topically to the epidermis of the skin a composition comprising effective amounts of relaxin hormone in an emollient vehicle in a program of maintenance therapy, whereby the skin substantially regains and maintains its firmness, turgor, and elasticity during said therapy, said composition and amounts of human relaxin hormone, being selected to provide a therapeutically effective dose of relaxin hormone.

2. The method of claim 1 wherein the skin is human facial skin.

3. The method of claim 1 wherein the skin is mammary gland skin.
PATENT DESCRIPTION BACKGROUND OF THE INVENTION

The present invention relates to the treatment of involuntary muscle dysfunctions. In particular, the present invention relates to the treatment of involuntary muscle dysfunction with relaxin hormone.

Involuntary muscle dysfunction plagues a large portion of the chronic pain and chronic fatigue patient population. Two prominent conditions involving involuntary muscle dysfunction include fibromyalgia and myofascial pain syndrome, amongst others.

Fibromyalgia is identified by the main symptoms of generalized chronic pain occurring mainly in the muscles and hyperalgesia, i.e. multiple tender points spread out over the body. The full range of symptoms include generalized pain, hyperalgesia, sleep disturbance, fatigue, muscle stiffness, hypersthesias, tension-type headaches, decreased muscle endurance and muscle weakness. Fibromyaglia has also been associated with irritable bowel syndrome, chronic fatigue syndrome, temporomandibular dysfunction syndrome, migraines, primary dysmenhorrea (painful menstruation) and others conditions including Raynaud's phenomenon. See Yunnus, Fibromyalgia Syndrome: Clinical Features and Spectrum, The Fibromyalgic Syndrome: Current Research and Future Directions in Epidemiology, Pathogenesis, and Treatment, 1994, pp. 5-21. See also Wolfe, When to Diagnose Fibromyalgia, Rheumatic Disease Clinics Of North America, Vol. 20, Number 2, May 1994. See Henriksson, Pathogenesis of Fibromyalgia, Journal of Musculoskeletal Pain, 1993, Vol. 1, pp. 3-16.

Fibromyalgia is the second or third most common disorder seen in community practice. The economic effects of fibromyalgia are substantial. In one study, it was reported that only 60% of fibromyalgia patients were employed, 30% of patients changed jobs because of fibromyalgia, 10% of patients considered themselves disabled, and 6% received disability payments. See Rothschild et al, Retrospective Assessment of Fibromyalgia Therapeusis, Comprehensive Therapy 1994, Vol. 20, pp 545-549.

Fibromyalgia also appears to be concentrated amongst the female patient population. It is estimated that about 80 to 90% of fibromyalgia patients are women. In addition, most patients are reported to fall in the 40 to 50 year age range. However, some studies have identified an archetypical patient as being a young women between the ages of 20 and 40. See Masi, A., Review of The Epidemiology and Criteria of Fibromyalgia and Myofascial Pain Syndromes: Concepts of Illness in Populations as Applied to Dysfunctional Syndromes, Journal of Musculoskeletal Pain, 1993, Vol. 1, pp. 113-116. See also Yunnus, supra, page 6.

While there is no current cure for fibromyalgia, it has been reported that some patients have responded to therapy with Halcion.RTM. and hypnosis. See Rothschild et al. However, these treatment modalities primarily address sleep disturbance and do not squarely address the cause of fibromyalgia or its full range of symptoms. Moreover, the use of Halcion.RTM. is not suitable for long-term treatment. While Halcion.RTM. induces sleep, Halcion also inhibits the patient's ability to achieve rapid eye movement (REM) sleep, which is necessary for therapeutic sleep.

Other conventional treatments of fibromyalgia include treating localized pain and muscle tension with intramuscular application of botulinum toxin as well as treatments including relaxation medication, exercise, and physical therapy. These latter treatment methods are aimed at relaxing and elongating the affected muscles.

However, none of these previous attempts at alleviating the symptoms of fibromyalgia and related involuntary muscle dysfunctions are effective. Moreover, these methods do not address the cause of fibromyalgia and other involuntary muscle dysfunctions.

In addition, many patients suffer from one or several of the symptoms (e.g., dysmenorrhea) associated with fibromyalgia without actually having fibromyalgia or the full range of symptoms. No single treatment is currently available for treating most or all of these symptoms.

SUMMARY OF THE INVENTION

The present invention is based on the recognition that the involuntary muscle dysfunctions associated with fibromyalgia, myofascial pain syndrome, dystonia, chronic fatigue syndrome, and other condition is the result of a deficiency of relaxin hormone or a suppression of relaxin's effect in the bloodstream. This lack of relaxin in the blood stream may be congenital or the result of another mechanism which suppresses the normal production or action of relaxin. Accordingly, a method of the present invention of treating involuntary muscle dysfunction comprises administering to a patient exhibiting symptoms associated with these conditions a therapeutically effective amount of relaxin hormone. The relaxin hormone will alleviate these conditions since relaxin acts to effect collagen formation and remodelling, thereby causing tissue changes of the type associated with parturition, i.e., smooth muscle relaxation, elongation of tendons and ligaments, etc.

This recognition is based on clinical observations by the inventor of the symptoms reported by female patients with fibromyalgia or myofascial pain syndrome when these patients are pregnant or in menopause. In particular, the basic observation is that fibromyalgia patients and myofascial pain syndrome patients do not report or exhibit the same symptoms (generalized pain, fatigue, inflexibility) when they are pregnant that they report or exhibit when they are not pregnant. In short, many or all of the symptoms associated with these conditions (e.g., fibromyolgia, myofascial pain, etc.) disappear when these patients are pregnant. Specifically, a large number of fibromyalgia patients (and patients with other involuntary muscle dysfunction maladies) report that their pain-related symptoms subside during pregnancy and return after pregnancy. This relationship is significant since the vast majority of fibromyalgia patients are women. The disappearance of fibromyalgia symptoms in these patients when pregnant is explained by the relatively high elevation of relaxin during pregnancy.

This recognition of relaxin as the primary causal agent in involuntary muscle dysfunction is confirmed by clinical observations by the inventor of patients with premenstrual pain syndrome (PMS). Women that have fibromyalgia or myofascial pain syndrome frequently have dysmenorrhea, reporting that their symptoms are aggravated just before and during the menstrual period. It is known in the art that the level of relaxin typically rises in women about 7-10 days after the midcycle surge of the luteinizing hormone and when conception does not occur, the level falls precipitously about one week before the menstrual period begins. The inventor has observed that female patients with PMS, fibromyaglia or myfascial pain syndrome with dysmenorrhea, all report an increase or beginning of their painful symptoms and muscle tension and discomfort one week before and during the menstrual period. Specifically, the inventor has observed that the precipitously falling level of the circulating relaxin corresponds to the beginning or increase in the level of patients' pain and discomfort one week before and during the menstrual period.

Administering relaxin to patients with fibromyalgia, myofascial pain syndrome and related involuntary muscle dysfunctions is expected to significantly alleviate the core symptoms of these conditions, e.g., generalized pain and tenderness, as well as alleviate specific secondary symptoms such as dysmenorrhea.

PATENT EXAMPLES This data is not available for free
PATENT PHOTOCOPY Available on request

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