The Effects of Estrogen Replacement Therapy in Postmenopausal Women With Hypercalciuria and Low Bone Mass

Osteoporosis Clinical Trial

Official title:

The Effects of Estrogen Replacement Therapy in Postmenopausal Women With Hypercalciuria and Low Bone Mass

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT01928082
• Other study ID #: 12-0062
• Status: Terminated
• Phase: Phase 2
• Start date: August 1, 2013
• Est. completion date: August 1, 2014

Study information

• Verified date: October 2018
• Source: University of Chicago
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The purpose of this study is to assess if estrogen replacement normalizes urinary calcium excretion in postmenopausal women with hypercalciuria and low bone mass and to assess for differences in response to estrogen replacement in women with familial hypercalciuria compared to nonfamilial hypercalciuria.

Description:

Subjects will primarily be recruited from the subjects of protocol 12-1421. Subjects may also be identified through chart review of patients seen by Dr. Favus in the Bone Clinic at the University of Chicago. These subjects will be mailed a letter describing the study and a request to contact us if they are willing to participate in the study.

We plan to enroll 20 subjects to obtain complete data on 16 subjects. We aim to have 10 subjects who will have confirmed familial idiopathic hypercalciuria (IH) and 10 subjects who will have no family history of hypercalciuria.

Subjects will be brought into the Clinical Research Center at the University of Chicago where blood samples will be collected by phlebotomy to obtain the following screening tests: complete metabolic panel; including calcium, phosphate, magnesium, creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and albumin; parathyroid hormone, 25-hydroxyvitamin D, follicle stimulating hormone (FSH), and estradiol. A twenty-four hour urine collection starting with second void of the day will be collected for calcium, phosphate, magnesium, citrate, oxalate, sodium, ammonia, sulfate, and creatinine. Subjects on diuretics will be screened after a 2 week washout period, provided this can be discontinued safely. If subjects have participated in study protocol number 12-1421, these screening tests do not have to be repeated and the results from protocol number 12-1421 will be used to determine eligibility.

Screening subjects who meet inclusion criteria can proceed to the observational study. Screening subjects who are vitamin D depleted (serum 25-hydroxyvitamin D less than 35 ng/mL) may be rescreened after repletion of vitamin D.

A letter describing the study aims, protocols, and risks and benefits will be sent to their primary care physicians and gynecologists. Upon completion of the study, a summary letter will be sent as well.

Prior to the baseline visit a twenty-four hour urine collection starting with the second void of the day will be collected for calcium, phosphate, magnesium, citrate, oxalate, sodium, ammonia, sulfate, and creatinine. Subjects on diuretics will require a 2 week washout period, provided this can be discontinued safely. During the baseline visit a medical history will be taken and a physical exam will be performed. Venous blood will be collected for 1,25-dihydroxyvitamin D3, osteocalcin, bone-specific alkaline phosphatase, C-telopeptides of type 1 collagen (CTX), procollagen type 1 N-terminal propeptide (P1NP), bone morphogenetic protein 2 (BMP-2), and sclerostin. If the subject has had these blood tests performed in the preceding four months for protocol 12-1421, the blood tests will not be repeated. 18F sodium fluoride PET/CT bone scan will be performed. The protocol for the radionuclide imaging is attached.

All subjects will be started on transdermal 17-beta-estradiol 0.05 mg/d, which is equivalent to the standard dose of conjugated estrogen dose of 0.625 mg, for 4 weeks and increased to 0.1 mg for subsequent 4 weeks. Given the short duration of this study, progesterone will not be provided, as 8 weeks is not of sufficient duration to significantly increase the risk of endometrial cancer (Strom, Schinnar et al. 2006).

For the entire study, diuretics will be discontinued if it has been deemed safe to do so by the principle investigator or prescribing physician. Throughout the study, subject will maintain 900-1200 mg of dietary calcium daily. To monitor dietary calcium intake, a 5 day diet diary will be kept from Sunday to Thursday of the fourth week of each medication dose. Compliance of the study medication will be assessed by estrogen patch counts.

The following blood tests will be repeated 4 and 8 weeks after starting estradiol patch:

complete metabolic panel (including calcium, phosphate, potassium, bicarbonate, chloride, magnesium, creatinine, and albumin), 25-hydroxyvitamin D, 1,25-dihydroxyvitamin D3, parathyroid hormone, estradiol, osteocalcin, bone-specific alkaline phosphatase, C-telopeptides of type 1 collagen (CTX), procollagen type 1 N-terminal propeptide (P1NP), bone morphogenetic protein 2 (BMP-2), and sclerostin. In addition, 4 and 8 weeks after starting estradiol patch, 24 hour urine collection will be performed for calcium, phosphate, magnesium, citrate, oxalate, sodium, ammonia, sulfate, and creatinine.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 1
• Est. completion date: August 1, 2014
• Est. primary completion date: August 1, 2014
• Accepts healthy volunteers: No
• Gender: Female
• Age group: 40 Years to 69 Years

Eligibility

Inclusion Criteria:

• Postmenopausal women

• Diagnosis of hypercalciuria

• Diagnosis of low bone mass

• Vitamin D replete (serum 25-hydroxyvitamin D level >35 ng/mL)

Exclusion Criteria:

• Secondary causes of hypercalciuria (primary hyperparathyroidism, sarcoidosis, vitamin D excess, malignant neoplasm, and renal tubular acidosis)

• Other metabolic bone disease (primary hyperparathyroidism, hyperthyroidism, hypercortisolemia, severe gastrointestinal disorders, liver cirrhosis, renal failure (Cr >1.5), active malignancy including multiple myeloma, rheumatological diseases, and Paget's disease of bone)

• Use of medications affecting bone and calcium metabolism (corticosteroids in the previous 3 months, suppressive dose of thyroid hormone, calcium channel blockers, anti-convulsants, aromatase inhibitors, thiazolidinediones, and cyclosporine A)

• History of coronary artery disease

• Breast cancer or suspected estrogen-dependent neoplasia

• Previous venous thromboembolic event

• Stroke

• Active liver disease

• Tobacco use within the past 6 months

• Negative colonoscopy within the previous 10 years or sigmoidoscopy within the previous 5 years

• Negative mammogram within the previous 2 years

• Negative Pap smear within the previous 3 years in women < or = 65 years old with an intact cervix

• No vaginal bleeding within the prior 5 months.

• Age > or = 70

• > or = 20 years since last menstrual period or use of hormone replacement therapy

Related Conditions & MeSH terms

• Bone Diseases, Metabolic
• Hypercalciuria
• Hypercalciuria, Familial Idiopathic
• Osteopenia
• Osteoporosis

Intervention

Drug:
• Transdermal estradiol
4 weeks of Vivelle-Dot 0.05 mg/day followed by 4 weeks of Vivelle-Dot 0.10 mg/day

Locations

Country	Name	City	State
United States	The University of Chicago	Chicago	Illinois

Sponsors (1)

Lead Sponsor	Collaborator
University of Chicago

Country where clinical trial is conducted

United States, 

References & Publications (15)

Cerdá Gabaroi D, Peris P, Monegal A, Albaladejo C, Martínez MA, Muxí A, Martínez de Osaba MJ, Surís X, Guañabens N. Search for hidden secondary causes in postmenopausal women with osteoporosis. Menopause. 2010 Jan-Feb;17(1):135-9. doi: 10.1097/gme.0b013e3181ade8e5. — View Citation

Christiansen C, Riis BJ, Rødbro P. Prediction of rapid bone loss in postmenopausal women. Lancet. 1987 May 16;1(8542):1105-8. — View Citation

Deutschmann HA, Weger M, Weger W, Kotanko P, Deutschmann MJ, Skrabal F. Search for occult secondary osteoporosis: impact of identified possible risk factors on bone mineral density. J Intern Med. 2002 Nov;252(5):389-97. — View Citation

Favus MJ, Karnauskas AJ, Parks JH, Coe FL. Peripheral blood monocyte vitamin D receptor levels are elevated in patients with idiopathic hypercalciuria. J Clin Endocrinol Metab. 2004 Oct;89(10):4937-43. — View Citation

Frumar AM, Meldrum DR, Geola F, Shamonki IM, Tataryn IV, Deftos LJ, Judd HL. Relationship of fasting urinary calcium to circulating estrogen and body weight in postmenopausal women. J Clin Endocrinol Metab. 1980 Jan;50(1):70-5. — View Citation

Giannini S, Nobile M, Dalle Carbonare L, Lodetti MG, Sella S, Vittadello G, Minicuci N, Crepaldi G. Hypercalciuria is a common and important finding in postmenopausal women with osteoporosis. Eur J Endocrinol. 2003 Sep;149(3):209-13. — View Citation

Lobo RA, Roy S, Shoupe D, Endres DB, Adams JS, Rude RK, Singer FR. Estrogen and progestin effects on urinary calcium and calciotropic hormones in surgically-induced postmenopausal women. Horm Metab Res. 1985 Jul;17(7):370-3. — View Citation

McKane WR, Khosla S, Burritt MF, Kao PC, Wilson DM, Ory SJ, Riggs BL. Mechanism of renal calcium conservation with estrogen replacement therapy in women in early postmenopause--a clinical research center study. J Clin Endocrinol Metab. 1995 Dec;80(12):3458-64. — View Citation

Nordin BE, Horowitz M, Need A, Morris HA. Renal leak of calcium in post-menopausal osteoporosis. Clin Endocrinol (Oxf). 1994 Jul;41(1):41-5. — View Citation

Nordin BE, Need AG, Morris HA, Horowitz M, Robertson WG. Evidence for a renal calcium leak in postmenopausal women. J Clin Endocrinol Metab. 1991 Feb;72(2):401-7. — View Citation

Nordin BE, Need AG, Morris HA, Horowitz M. Biochemical variables in pre- and postmenopausal women: reconciling the calcium and estrogen hypotheses. Osteoporos Int. 1999;9(4):351-7. — View Citation

Nordin BE, WIshart JM, Clifton PM, McArthur R, Scopacasa F, Need AG, Morris HA, O'Loughlin PD, Horowitz M. A longitudinal study of bone-related biochemical changes at the menopause. Clin Endocrinol (Oxf). 2004 Jul;61(1):123-30. — View Citation

Puche RC, Roveri E, Perez Jimeno N, Roberti A, Poudes G, Bocanera R, Tozzini R. Hypercalciuria and urinary saturation measurements in climacteric women. Maturitas. 1993 Jan;16(1):39-47. — View Citation

Stock JL, Coderre JA, Mallette LE. Effects of a short course of estrogen on mineral metabolism in postmenopausal women. J Clin Endocrinol Metab. 1985 Oct;61(4):595-600. — View Citation

Voetberg GA, Netelenbos JC, Kenemans P, Peters-Muller ER, van de Weijer PH. Estrogen replacement therapy continuously combined with four different dosages of dydrogesterone: effect on calcium and lipid metabolism. J Clin Endocrinol Metab. 1994 Nov;79(5):1465-9. — View Citation

* Note: There are 15 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Other	Serum Estradiol	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum Total Calcium	Not available because the study was terminated	4 weeks, 8 weeks
Other	Calculated Serum Ionized Calcium	Not available because the study was terminated	4 weeks, 8 weeks
Other	Calculated Tubular Resorption of Calcium	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum 25 Hydroxyvitamin D	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum Parathyroid Hormone	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum Phosphorus	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum Osteocalcin	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum Bone-specific Alkaline Phosphatase	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum C-telopeptides of Type 1 Collagen	Not available because the study was terminated	4 weeks, 8 weeks
Other	Serum Procollagen Type 1 N-terminal Propeptide	It is not available because the study was terminated	4 weeks, 8 weeks
Primary	Absolute Change in 24 Hour Urinary Calcium Excretion	0 participants were measured because the study was terminated	4 weeks, 8 weeks
Secondary	Serum 1,25-dihydroxyvitamin D3	0 participants were analyzed because the study was terminated	4 weeks, 8 weeks
Secondary	Serum Bone Morphogenetic Protein 2	Not available because the study was terminated	4 weeks, 8 weeks
Secondary	Serum Sclerostin	Not available because the study was terminated	4 weeks, 8 weeks