Parathyroid HormonePhase 4TDFNCT05313477
The Effects of Vitamin D and Calcium Supplementation to Parathyroid Hormone in CHB Patients Treated With TDF
A Phase 4 study testing Ergocalciferol Capsules and Calcium carbonate in people with Parathyroid Hormone and Tenofovir Disoproxil Fumarate, run by Mahidol University at 1 site in Thailand.
Trial summary
Nucleot(s)ide is an antiviral drug that can reduce the number of viruses, reduce the risk of HCC, regress hepatic fibrosis and reduce death from Hepatitis B viral infection. Tenofovir disoproxil fumarate (TDF) is one of nucleotide analogue that is recommended to treated patients with Hepatitis B viral infection. Read more about this study
- Who is it for?
- Ages 18 to 70 yearsHealthy volunteers can take part
- Conditions the study is for
- Parathyroid Hormone, Tenofovir Disoproxil Fumarate, Chronic Hepatitis B Virus
- What is being tested?
- Ergocalciferol Capsules and Calcium carbonate
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 64 participants
- Where
- 1 siteThailand
- Study dates
- 1 May 2022to 30 Nov 2023
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 70 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Age between 18 - 75 years old
- Chronic hepatitis B infected patients treated with TDF monotherapy
- eGFR ≥ 60 mL/ min/ 1.73 m2
- HBV viral load <10 IU/ mL
Who cannot join
- HIV infection or hepatitis C co-infection
- Decompensated cirrhosis, including variceal bleeding, ascites, hepatic encephalopathy
- History of Hepatocellular carcinoma
- Active malignancy of cancer in other organs
- Pregnancy or lactation
- Primary hyperparathyroidism
Show all 13Show fewer
- History of thyroid or parathyroid surgery
- History of radiation at neck area
- Any osteoporosis treatment or history of osteoporosis diagnosis
- Chronic kidney disease
- Current use of Vitamin D
- Adverse event or allergy to TDF
- Chronic hepatitis B patients with TDF resistance
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Effects of Vitamin D and Calcium Supplementation to Parathyroid Hormone in CHB Patients Treated With Tenofovir Disoproxil Fumarate
Nucleot(s)ide is an antiviral drug that can reduce the number of viruses, reduce the risk of HCC, regress hepatic fibrosis and reduce death from Hepatitis B viral infection. Tenofovir disoproxil fumarate (TDF) is one of nucleotide analogue that is recommended to treated patients with Hepatitis B viral infection. However, long-term TDF therapy may have side effects especially nephrotoxicity and bone toxicity.
Previous studies in human immunodeficiency virus (HIV) infected patients who treated with TDF containing regimen antiretroviral therapy, in vitamin D supplement group had a statistic significance of low parathyroid hormone level and better in bone mineral density regardless of initial vitamin D level. Therefore, the main objective of this study is to evaluate the vitamin D and calcium supplement to patients with hepatitis B who have taken TDF, in parathyroid hormone level, bone mineral density, renal function and renal phosphate loss compared to patients who have no vitamin D and calcium supplement.
Read the detailed description
Hepatitis B virus is a global public health problem. This infection leads to chronic hepatitis, cirrhosis and liver cancer. According to past statistics, infection with hepatitis B virus is a common cause of hepatocellular carcinoma about 60% in East-Asia and Africa and about 20% in Western countries. About 350-400 million people are infected worldwide. Infection with hepatitis B virus is also an important factor of death in 1million patients per year.
Nucleot(s)ide is an antiviral drug that can reduce the number of viruses, reduce the risk of HCC, regress hepatic fibrosis and reduce death from Hepatitis B viral infection. Nowadays, the recommendation of nucleot(s)ide prefers Tenofovir disoproxil fumarate (TDF), Tenofovir Alafenamide (TAF) and Entecavir (ETV) than Lamivudine, Adefovir and Telbivudine due to high potency and low resistance rate Tenofovir disoproxil fumarate (TDF) is one of nucleotide analogue that inhibits reverse transcriptase in HBV replication process. However, long-term TDF therapy may have side effects especially nephrotoxicity. The proposed mechanisms of nephrotoxicity of TDF are cumulative of TDF at proximal tubule of kidney leads to mitochondrial toxicity, downregulation of sodium-phosphorus cotransporter, sodium/ hydrogen exchanger 3 and aquaporin 2, decreased endothelial nitric oxide-synthase (eNOS) and renal vasoconstriction results in tubulopathy in renal proximal tubule, increase of phosphate loss in urine and increase od serum creatinine.
Moreover, TDF also affects to decrease bone mineral density (BMD) that related with renal phosphate loss, loss of osteoblast function, high parathyroid hormone level regardless of vitamin D level and high fibroblast growth factor 23 (FGF23) leads to worsen in bone mineralization Vitamin D has a protective effect and indicate for osteoporosis treatment. The chronic hepatitis B infected patients with vitamin D deficiency may have a poor prognosis in hepatic fibrosis and high HBV DNA level. Previous studies in human immunodeficiency virus (HIV) infected patients who treated with TDF containing regimen antiretroviral therapy, in vitamin D supplement group had a statistic significance of low parathyroid hormone level and better in bone mineral density regardless of initial vitamin D level. Therefore, the main objective of this study is to evaluate the vitamin D and calcium supplement to patients with hepatitis B who have taken TDF, in parathyroid hormone level, bone mineral density, renal function and renal phosphate loss compared to patients who have no vitamin D and calcium supplement.
- Being tested
- Ergocalciferol Capsules, Calcium carbonate
- Keywords
- Tenofovir disoproxil fumarate, Tenofovir, Chronic hepatitis B, Parathyroid hormone, Bone mineral density, Renal phosphate loss, Vitamin D, Calcium, TDF, PTH, CHB, HBV
- Medical subject headings
- Hepatitis B, Chronic
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Ergocalciferol CapsulesDrug
Depend on initial 25(OH) vitamin D level If <10ng/mL, 60000U of Ergocalciferol capsules per week If 10-19.9ng/mL, 40000U of Ergocalciferol capsules per week If >20 ng/mL, 20000U of Ergocalciferol capsule per week
Calcium carbonateDrug
1000mg of Calcium carbonate daily
| Study group | Role | What they receive |
|---|---|---|
| Supplement group | Active comparator | Vitamin D2 supplement based on initial vitamin D level
* ≥ 20ng/mL -> vitamin D2 20,000unit/week
* 10-19.9ng/mL -> vitamin D2 40,000unit/week
* <10ng/mL -> vitamin D2 60,000unit/week Calcium carbonate 1000mg/day Receives: Drug: Ergocalciferol Capsules; Drug: Calcium carbonate |
| No supplement group | No intervention | no medication supplement |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in serum parathyroid hormone
Change from the baseline in serum parathyroid hormone as assessed by Electrochemiluminescent immunoassay (ECLIA)
Measured: 48weeks
Secondary outcomes (3)
Change in bone mineral density
Change from the baseline in bone mineral density as assessed by Dual-energy X-ray absorptiometry (DXA)
Measured: 48weeks
Renal function changes
Change from the baseline in renal function (eGFR) based on creatinine as assessed by Enzymatic method
Measured: 48weeks
Change in renal phosphate loss
Change from the baseline in the tubular reabsorption of phosphate (TRP) as renal phosphate loss depended on serum creatinine, urine creatine (assessed by enzymatic method) and serum phosphate, urine phosphate (assessed by modification of the classical phosphomolybdate method by Fiske and Subbarow)
Measured: 48weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Apr 2022
- Study start1 May 2022
- Primary completion31 Aug 2023
- Study completion30 Nov 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (33)Papers the sponsor has linked to this study.
- Other trials for Parathyroid HormoneStudies of the same condition, open and under way.
- More trials run by Mahidol UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 64 participants (actual)
Sponsor and investigators
- Lead sponsor
- Mahidol University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Watcharasak Chotiyaputta, Mahidol University
- Investigators
- Watcharasak Chotiyaputta, Asso Prof, Principal investigator, Mahidol University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05313477
- Sponsor's protocol ID
- Si 1045/2020
- Acronym
- TDF
- Status last verified
- Sep 2024
- First submitted
- 7 Mar 2022
- Last updated
- 5 Sep 2024
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Trepo C, Chan HL, Lok A. Hepatitis B virus infection. Lancet. 2014 Dec 6;384(9959):2053-63. doi: 10.1016/S0140-6736(14)60220-8. Epub 2014 Jun 18.
PubMed 24954675Lai CL, Yuen MF. Chronic hepatitis B--new goals, new treatment. N Engl J Med. 2008 Dec 4;359(23):2488-91. doi: 10.1056/NEJMe0808185. No abstract available.
PubMed 19052131European Association for the Study of the Liver. EASL 2017 Clinical Practice Guidelines on the management of hepatitis B virus infection. J Hepatol. 2017 Aug;67(2):370-398. doi: 10.1016/j.jhep.2017.03.021. Epub 2017 Apr 18.
PubMed 28427875Zampino R, Boemio A, Sagnelli C, Alessio L, Adinolfi LE, Sagnelli E, Coppola N. Hepatitis B virus burden in developing countries. World J Gastroenterol. 2015 Nov 14;21(42):11941-53. doi: 10.3748/wjg.v21.i42.11941.
PubMed 26576083European Association for the Study of the Liver. EASL Clinical Practice Guidelines: Management of hepatocellular carcinoma. J Hepatol. 2018 Jul;69(1):182-236. doi: 10.1016/j.jhep.2018.03.019. Epub 2018 Apr 5. No abstract available.
PubMed 29628281Yuen MF, Chen DS, Dusheiko GM, Janssen HLA, Lau DTY, Locarnini SA, Peters MG, Lai CL. Hepatitis B virus infection. Nat Rev Dis Primers. 2018 Jun 7;4:18035. doi: 10.1038/nrdp.2018.35.
PubMed 29877316Terrault NA, Lok ASF, McMahon BJ, Chang KM, Hwang JP, Jonas MM, Brown RS Jr, Bzowej NH, Wong JB. Update on prevention, diagnosis, and treatment of chronic hepatitis B: AASLD 2018 hepatitis B guidance. Hepatology. 2018 Apr;67(4):1560-1599. doi: 10.1002/hep.29800. No abstract available.
PubMed 29405329Wang YJ, Yang L, Zuo JP. Recent developments in antivirals against hepatitis B virus. Virus Res. 2016 Feb 2;213:205-213. doi: 10.1016/j.virusres.2015.12.014. Epub 2015 Dec 28.
PubMed 26732483Wong GL, Seto WK, Wong VW, Yuen MF, Chan HL. Review article: long-term safety of oral anti-viral treatment for chronic hepatitis B. Aliment Pharmacol Ther. 2018 Mar;47(6):730-737. doi: 10.1111/apt.14497. Epub 2018 Jan 22.
PubMed 29359487de Fraga RS, Van Vaisberg V, Mendes LCA, Carrilho FJ, Ono SK. Adverse events of nucleos(t)ide analogues for chronic hepatitis B: a systematic review. J Gastroenterol. 2020 May;55(5):496-514. doi: 10.1007/s00535-020-01680-0. Epub 2020 Mar 17.
PubMed 32185517Liborio AB, Andrade L, Pereira LV, Sanches TR, Shimizu MH, Seguro AC. Rosiglitazone reverses tenofovir-induced nephrotoxicity. Kidney Int. 2008 Oct;74(7):910-8. doi: 10.1038/ki.2008.252. Epub 2008 Jun 18.
PubMed 18563054Birkus G, Hitchcock MJ, Cihlar T. Assessment of mitochondrial toxicity in human cells treated with tenofovir: comparison with other nucleoside reverse transcriptase inhibitors. Antimicrob Agents Chemother. 2002 Mar;46(3):716-23. doi: 10.1128/AAC.46.3.716-723.2002.
PubMed 11850253Kohler JJ, Hosseini SH, Hoying-Brandt A, Green E, Johnson DM, Russ R, Tran D, Raper CM, Santoianni R, Lewis W. Tenofovir renal toxicity targets mitochondria of renal proximal tubules. Lab Invest. 2009 May;89(5):513-9. doi: 10.1038/labinvest.2009.14. Epub 2009 Mar 9.
PubMed 19274046Rodriguez-Novoa S, Labarga P, Soriano V, Egan D, Albalater M, Morello J, Cuenca L, Gonzalez-Pardo G, Khoo S, Back D, Owen A. Predictors of kidney tubular dysfunction in HIV-infected patients treated with tenofovir: a pharmacogenetic study. Clin Infect Dis. 2009 Jun 1;48(11):e108-16. doi: 10.1086/598507.
PubMed 19400747Lampertico P, Chan HL, Janssen HL, Strasser SI, Schindler R, Berg T. Review article: long-term safety of nucleoside and nucleotide analogues in HBV-monoinfected patients. Aliment Pharmacol Ther. 2016 Jul;44(1):16-34. doi: 10.1111/apt.13659. Epub 2016 May 19.
PubMed 27198929
Study at a glance
From the registry record, last updated by the sponsor on 5 Sep 2024. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects of Vitamin D and Calcium Supplementation to Parathyroid Hormone in CHB Patients Treated With Tenofovir Disoproxil Fumarate
- ClinicalTrials.gov ID
- NCT05313477
- Acronym / sponsor ID
- TDF / Si 1045/2020
- Keywords
- Tenofovir disoproxil fumarate, Tenofovir, Chronic hepatitis B, Parathyroid hormone, Bone mineral density, Renal phosphate loss, Vitamin D, Calcium
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 64 participants (actual)
- Lead sponsor
- Mahidol UniversityUniversity, hospital or other
- Study start
- 1 May 2022 (actual)
- Primary completion
- 31 Aug 2023 (actual)
- Study completion
- 30 Nov 2023 (actual)
- First posted
- 6 Apr 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Nucleot(s)ide is an antiviral drug that can reduce the number of viruses, reduce the risk of HCC, regress hepatic fibrosis and reduce death from Hepatitis B viral infection. Tenofovir disoproxil fumarate (TDF) is one of nucleotide analogue that is recommended to treated patients with Hepatitis B viral infection. However, long-term TDF therapy may have side effects especially nephrotoxicity and bone toxicity.
Previous studies in human immunodeficiency virus (HIV) infected patients who treated with TDF containing regimen antiretroviral therapy, in vitamin D supplement group had a statistic significance of low parathyroid hormone level and better in bone mineral density regardless of initial vitamin D level. Therefore, the main objective of this study is to evaluate the vitamin D and calcium supplement to patients with hepatitis B who have taken TDF, in parathyroid hormone level, bone mineral density, renal function and renal phosphate loss compared to patients who have no vitamin D and calcium supplement.
Detailed description
Hepatitis B virus is a global public health problem. This infection leads to chronic hepatitis, cirrhosis and liver cancer. According to past statistics, infection with hepatitis B virus is a common cause of hepatocellular carcinoma about 60% in East-Asia and Africa and about 20% in Western countries. About 350-400 million people are infected worldwide. Infection with hepatitis B virus is also an important factor of death in 1million patients per year.
Nucleot(s)ide is an antiviral drug that can reduce the number of viruses, reduce the risk of HCC, regress hepatic fibrosis and reduce death from Hepatitis B viral infection. Nowadays, the recommendation of nucleot(s)ide prefers Tenofovir disoproxil fumarate (TDF), Tenofovir Alafenamide (TAF) and Entecavir (ETV) than Lamivudine, Adefovir and Telbivudine due to high potency and low resistance rate Tenofovir disoproxil fumarate (TDF) is one of nucleotide analogue that inhibits reverse transcriptase in HBV replication process. However, long-term TDF therapy may have side effects especially nephrotoxicity. The proposed mechanisms of nephrotoxicity of TDF are cumulative of TDF at proximal tubule of kidney leads to mitochondrial toxicity, downregulation of sodium-phosphorus cotransporter, sodium/ hydrogen exchanger 3 and aquaporin 2, decreased endothelial nitric oxide-synthase (eNOS) and renal vasoconstriction results in tubulopathy in renal proximal tubule, increase of phosphate loss in urine and increase od serum creatinine.
Moreover, TDF also affects to decrease bone mineral density (BMD) that related with renal phosphate loss, loss of osteoblast function, high parathyroid hormone level regardless of vitamin D level and high fibroblast growth factor 23 (FGF23) leads to worsen in bone mineralization Vitamin D has a protective effect and indicate for osteoporosis treatment. The chronic hepatitis B infected patients with vitamin D deficiency may have a poor prognosis in hepatic fibrosis and high HBV DNA level. Previous studies in human immunodeficiency virus (HIV) infected patients who treated with TDF containing regimen antiretroviral therapy, in vitamin D supplement group had a statistic significance of low parathyroid hormone level and better in bone mineral density regardless of initial vitamin D level. Therefore, the main objective of this study is to evaluate the vitamin D and calcium supplement to patients with hepatitis B who have taken TDF, in parathyroid hormone level, bone mineral density, renal function and renal phosphate loss compared to patients who have no vitamin D and calcium supplement.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Supplement group | Active comparator | Drug: Ergocalciferol Capsules, Drug: Calcium carbonateVitamin D2 supplement based on initial vitamin D level * ≥ 20ng/mL -> vitamin D2 20,000unit/week * 10-19.9ng/mL -> vitamin D2 40,000unit/week * <10ng/mL -> vitamin D2 60,000unit/week Calcium carbonate 1000mg/day |
| No supplement group | No intervention | –no medication supplement |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Age between 18 - 75 years old
- Chronic hepatitis B infected patients treated with TDF monotherapy
- eGFR ≥ 60 mL/ min/ 1.73 m2
- HBV viral load <10 IU/ mL
Key exclusion criteria (13 listed)
- HIV infection or hepatitis C co-infection
- Decompensated cirrhosis, including variceal bleeding, ascites, hepatic encephalopathy
- History of Hepatocellular carcinoma
- Active malignancy of cancer in other organs
- Pregnancy or lactation
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Ergocalciferol CapsulesDepend on initial 25(OH) vitamin D level If <10ng/mL, 60000U of Ergocalciferol capsules per week If 10-19.9ng/mL, 40000U of Ergocalciferol capsules per week If >20 ng/mL, 20000U of Ergocalciferol capsule per week | Drug | Supplement group |
| Calcium carbonate1000mg of Calcium carbonate daily | Drug | Supplement group |
Primary outcome
Change in serum parathyroid hormone
Time frame: 48weeks
Change from the baseline in serum parathyroid hormone as assessed by Electrochemiluminescent immunoassay (ECLIA)
3 secondary outcomes
Change in bone mineral density
Time frame: 48weeks
Renal function changes
Time frame: 48weeks
Change in renal phosphate loss
Time frame: 48weeks
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Sep 2024.
- Results publication: PubMed 24954675Trepo C, Chan HL, Lok A. Hepatitis B virus infection. Lancet. 2014 Dec 6;384(9959):2053-63. doi: 10.1016/S0140-6736(14)60220-8. Epub 2014 Jun 18.
- Results publication: PubMed 19052131Lai CL, Yuen MF. Chronic hepatitis B--new goals, new treatment. N Engl J Med. 2008 Dec 4;359(23):2488-91. doi: 10.1056/NEJMe0808185. No abstract available.
- Results publication: PubMed 28427875European Association for the Study of the Liver. EASL 2017 Clinical Practice Guidelines on the management of hepatitis B virus infection. J Hepatol. 2017 Aug;67(2):370-398. doi: 10.1016/j.jhep.2017.03.021. Epub 2017 Apr 18.
- Results publication: PubMed 26576083Zampino R, Boemio A, Sagnelli C, Alessio L, Adinolfi LE, Sagnelli E, Coppola N. Hepatitis B virus burden in developing countries. World J Gastroenterol. 2015 Nov 14;21(42):11941-53. doi: 10.3748/wjg.v21.i42.11941.
- Results publication: PubMed 29628281European Association for the Study of the Liver. EASL Clinical Practice Guidelines: Management of hepatocellular carcinoma. J Hepatol. 2018 Jul;69(1):182-236. doi: 10.1016/j.jhep.2018.03.019. Epub 2018 Apr 5. No abstract available.
- Results publication: PubMed 29877316Yuen MF, Chen DS, Dusheiko GM, Janssen HLA, Lau DTY, Locarnini SA, Peters MG, Lai CL. Hepatitis B virus infection. Nat Rev Dis Primers. 2018 Jun 7;4:18035. doi: 10.1038/nrdp.2018.35.
- Results publication: PubMed 29405329Terrault NA, Lok ASF, McMahon BJ, Chang KM, Hwang JP, Jonas MM, Brown RS Jr, Bzowej NH, Wong JB. Update on prevention, diagnosis, and treatment of chronic hepatitis B: AASLD 2018 hepatitis B guidance. Hepatology. 2018 Apr;67(4):1560-1599. doi: 10.1002/hep.29800. No abstract available.
- Results publication: PubMed 26732483Wang YJ, Yang L, Zuo JP. Recent developments in antivirals against hepatitis B virus. Virus Res. 2016 Feb 2;213:205-213. doi: 10.1016/j.virusres.2015.12.014. Epub 2015 Dec 28.
- Results publication: PubMed 29359487Wong GL, Seto WK, Wong VW, Yuen MF, Chan HL. Review article: long-term safety of oral anti-viral treatment for chronic hepatitis B. Aliment Pharmacol Ther. 2018 Mar;47(6):730-737. doi: 10.1111/apt.14497. Epub 2018 Jan 22.
- Results publication: PubMed 32185517de Fraga RS, Van Vaisberg V, Mendes LCA, Carrilho FJ, Ono SK. Adverse events of nucleos(t)ide analogues for chronic hepatitis B: a systematic review. J Gastroenterol. 2020 May;55(5):496-514. doi: 10.1007/s00535-020-01680-0. Epub 2020 Mar 17.
- Results publication: PubMed 18563054Liborio AB, Andrade L, Pereira LV, Sanches TR, Shimizu MH, Seguro AC. Rosiglitazone reverses tenofovir-induced nephrotoxicity. Kidney Int. 2008 Oct;74(7):910-8. doi: 10.1038/ki.2008.252. Epub 2008 Jun 18.
- Results publication: PubMed 11850253Birkus G, Hitchcock MJ, Cihlar T. Assessment of mitochondrial toxicity in human cells treated with tenofovir: comparison with other nucleoside reverse transcriptase inhibitors. Antimicrob Agents Chemother. 2002 Mar;46(3):716-23. doi: 10.1128/AAC.46.3.716-723.2002.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Watcharasak Chotiyaputta, Asso Prof principal investigator
Mahidol University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Ergocalciferol Capsules and Calcium carbonate in people with Parathyroid Hormone and Tenofovir Disoproxil Fumarate, run by Mahidol University at 1 site in Thailand.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 13 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 5 Sep 2024. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Thailand. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in serum parathyroid hormone (time frame: 48weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05313477, which also lists 33 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Sep 2024.