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Protocol Details

The Neural Immune Mechanisms and Genetic Influences on Chronic Pelvic Pain in Women with Endometriosis

This study is NOT currently recruiting participants.

Summary | Eligibility | Citations | Contacts

Summary

Number

04-N-0056

Sponsoring Institute

National Institute of Neurological Disorders and Stroke (NINDS)

Recruitment Detail

Type: Completed Study; data analyses ongoing
Gender: Female
Min Age: 18
Max Age: 50

Referral Letter Required

No

Population Exclusion(s)

Male;
Children

Keywords

Myofascial Dysfunction;
Sensitization;
Healthy Volunteers;
Overlapping Pain Conditions;
Hypothalamic-Pituitary-Adrenal Axis;
Natural History

Recruitment Keyword(s)

None

Condition(s)

Endometriosis;
Chronic Pelvic Pain

Investigational Drug(s)

None

Investigational Device(s)

None

Intervention(s)

None

Supporting Site

National Institute of Neurological Disorders and Stroke

This study will examine pelvic pain associated with endometriosis and explore better approaches to treatment. In women with endometriosis, uterine tissue grows outside the uterus. Standard treatments - altering hormone levels to prevent endometrial tissue growth or surgically removing endometrial tissue - treat pelvic pain only temporarily. This study will investigate the role of sex hormones, immune chemicals, stress hormones, and genes in pelvic pain and determine how the nerve, muscle, and skeletal systems are involved in this pain.

Women between 18 and 50 years of age who:

1) have endometriosis and chronic pelvic pain, and

2) have chronic pelvic pain without endometriosis, and

3) have neither endometriosis nor chronic pelvic pain and are willing to have a tubal ligation (Healthy Volunteer group),

may be eligible for this study. Candidates are screened with a questionnaire to obtain information about their pain and previous treatments and related medical or social issues. Participants will undergo the following tests and procedures:

1. Medical history and physical examination, including pelvic exam, blood tests, urinalysis, and diaphragm fitting.

2. Questionnaires about pain, quality of life, sexuality, psychological attitudes, spiritual experiences, and history of headache and depression.

3. At-home monitoring for 4 to 6 weeks of pain symptoms, menstruation and spotting, medicines taken, and urine collections to test for "LH" surge. LH is the hormone that causes the ovary to release a mature egg.

4. Pre-laparoscopy evaluation to include:

-Examination of menstrual blood collected in a diaphragm for 4 hours.

-Blood sampling to measure adrenal and pituitary hormones. For this test, corticotrophin-releasing hormone (CRH) is injected through an IV needle. Up to five blood samples are drawn, starting before the injection until 45 minutes after it. Blood is also collected at this time for genetic analysis.

-In-depth pain assessment to identify trigger points in muscles associated with pelvic pain, regions of skin sensitivity, and bone pain. Some women will undergo microdialysis, which uses an acupuncture-type needle to collect chemicals from two different muscles.

-Blood sampling twice a week for 1 month to measure changes in blood substances during the menstrual cycle.

-Blood sampling after the LH surge to measure progesterone levels.

-Cervicovaginal lavage (washing of the cervix with saline and collecting the fluid) to obtain secretions for research.

-Ultrasound of the ovaries and uterus. This examination uses a probe inserted into the vagina that emits sound waves that are used to form pictures of the internal structures. A small piece of uterine lining is also obtained for examination and research purposes.

-A visit with the members of the Pain and Palliative care service to evaluate the pain in anticipation of offering other treatments for pain after surgery.

-Surgery:

CPP + Endo or CPP only: Laparoscopy to look for and remove endometrial tissue. This procedure is done under general anesthetic. A viewing instrument called a laparoscope is passed through an incision in the belly button to look for endometriosis. If it is found, two or more incisions are made in the abdomen for other instruments to remove the tissue. A small piece of uterine lining is also obtained for examination and research purposes.

Healthy Volunteers: Laparoscopy to perform the tubal ligation. A tubal ligation, commonly known as "getting your tubes tied," is a surgical procedure for women to sterilize them. This procedure closes the fallopian tubes, stopping the egg from traveling from the ovary to the uterus and preventing sperm from reaching the fallopian tube to fertilize an egg. In a tubal ligation, fallopian tubes are cut, burned, or blocked with rings, bands or clips. The surgery is effective immediately. Tubal ligations are 99.5% effective as birth control. This procedure is done under general anesthetic. A viewing instrument called a laparoscope is passed through an incision in the belly button to perform a tubal ligation. Two or more incisions are made in the abdomen for other instruments to perform the procedure. During the laparoscopy, we will look for and remove endometrial tissue. A small piece of uterine lining is also obtained for examination and research purposes.

-Follow-up evaluations. Two weeks after surgery, patients return to NIH to discuss the surgical findings and treatment options. Follow-up visits are then scheduled at 1, 3, and 6 months after surgery to complete questionnaires and determine if the treatment is working. Blood samples are drawn at each visit.

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Eligibility

INCLUSION CRITERIA:

Women between the ages of 18 and 50 years, who have their reproductive organs. Those undergoing tubal ligation must be at least 21 years old.

Excellent health other than a three-month history of pelvic pain and documented endometriosis at laparoscopy. Chronic medications may be acceptable at the discretion of the Principal Investigator (PI). Use of antidepressants, medications for migraines and headaches, allergy medications, and treatment of bowel symptoms such as irritable bowel disease will be allowed.

Do not desire pregnancy for the duration of the study.

Are using abstinence, mechanical (condoms, diaphragms) or sterilization methods of contraception and are willing to continue using them throughout the study.

Willing and able to give informed consent.

Willing and able to comply with study requirements.

BMI less than 32 kg/m(2).

History of regular cyclic menses.

EXCLUSION CRITERIA:

Women with other causes of chronic pelvic pain including infectious, gastrointestinal, psychologic disorders, fibromyalgia and chronic fatigue syndrome.

Significant abnormalities in the physical or laboratory examination including renal and liver function more than twice the normal range.

Hysterectomy or bilateral salpingo-oophorectomy.

Pregnancy.

Lactation.

Use of hormonal contraception, selective estrogen receptor modulators, progestins, estrogens, steroids, or ovulation induction in the last 3 months.

Other medical or surgical treatment for endometriosis in the last 6 months.

Untreated abnormal pap smear or other gynecologic condition.

Manic-depressive illness or untreated major depression.

HIV infection.


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Citations:

Al-Harthi L, et al. A human immunodeficiency virus (HIV)-inducing factor from the female genital tract activates HIV-1 gene expression through the kappaB enhancer. J Infect Dis. 1998 Nov;178(5):1343-51.

Al-Harthi L, et al. The impact of the ovulatory cycle on cytokine production: evaluation of systemic, cervicovaginal, and salivary compartments. J Interferon Cytokine Res. 2000 Aug;20(8):719-24.

Berkley KJ. Sex differences in pain. Behav Brain Sci. 1997 Sep;20(3):371-80; discussion 435-513.

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Contacts:

Principal Investigator

Referral Contact

For more information:

Barbara I. Karp, M.D.
National Institute of Neurological Disorders and Stroke (NINDS)
NIHBC 10 - CLINICAL CENTER BG RM 2A23
10 CENTER DR
BETHESDA MD 20892
(240) 461-5127
karpb@ninds.nih.gov

Barbara I. Karp, M.D.
National Institute of Neurological Disorders and Stroke (NINDS)
NIHBC 10 - CLINICAL CENTER BG RM 2A23
10 CENTER DR
BETHESDA MD 20892
(240) 461-5127
karpb@ninds.nih.gov

Office of Patient Recruitment
National Institutes of Health Clinical Center (CC)
Building 61, 10 Cloister Court
Bethesda, Maryland 20892
Toll Free: 1-800-411-1222
Local Phone: 301-451-4383
TTY: TTY Users Dial 7-1-1
ccopr@nih.gov

Clinical Trials Number:

NCT00073801

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