Clinical Drug Experience Knowledgebase

A Phase II Clinical Trial to Assess Risk and Benefit of Oral Low Dose Prednisolone for HIV Infected People Prior to the Commencement of Antiretroviral Treatment

1. INTRODUCTION

1 BACKGROUND

For treatment in advanced HIV infection, combination therapy with antiretroviral drugs (ARVs) is the best option under current international standards. The benefit of ARVs is best, if they are used relatively late in the course of the disease, commonly after a progression of years. However, under a global perspective, more than 90% of those who need ARVs world-wide have no access to them.

ARVs are not used in early stages of infection without significant immunodeficiency. Although a variable degree of immunodeficiency may be present even in early HIV disease, there is no established treatment for this phase.

Immunodeficiency is associated with a decline of a certain population of lymphocytes, the CD4 cells or T-helper cells. It seems to be a useful concept to postulate that a treatment which slows down this loss of CD4 cells could also slow down the progression of HIV disease.

In vitro findings and clinical studies showed a CD4 cell stabilizing effect of corticosteroids. First clinical studies were based on relatively high dosages (Andrieu JM 1995, LU W 1995, Andrieu JM 2004,). These are hardly justifiable for a longer time, because of numerous side effects, e.g. immunosuppression of the cellular immune system, the manifestation of diabetes or the Cushing syndrome.

In 2005 Ulmer et al. reported in a mono-centric open label study a CD4- stabilizing effect under the administration of low dose prednisolone (5 mg/d) (Ulmer A 2005). Patients with more than 300 CD4 cells/µl were included. After two years the 28 patients on treatment presented 176.1 more CD4 cells than those of 62 control patients in comparison to their baseline counts (p 0.0009) and after three years the 15 patients on treatment presented 236.2 more CD4 cells/µl than those of 33 control patients in comparison to their baseline counts (p = 0,0021). The initiation of treatment with the more expensive and toxic ARVs was delayed.

Based on this study and an increasing amount of experience by Ulmer and others, it seems to be justified to systematically investigate the effect of low dose prednisolone on the progression of HIV disease. The costs of 5 mg prednisolone per day is in a range of 3 US $ per year (Action Medeor). If it turned out that low dose prednisolone prolongs the period until ARVs become indicated without imposing intolerable risks on the patient, this approach could be a very attractive future option for countries with health systems in resource-poor settings.

1.2 RATIONAL FOR THE STUDY

Until now, there are no prospective randomized studies on the use of corticosteroids in latent HIV disease. Furthermore, low dose prednisolone (5 mg/d) is not sufficient tested for the risks and benefit for HIV patients especially for those living in poor settings with a higher risk of infections. This study will assess the benefit and the safety profile for low dose prednisolone therapy for patients in a region with limited resources and high prevalence of infections.

1.3 SITE DESCRIPTION

The study will be conducted at the Bugando Medical Centre in Mwanza, Tanzania.

STUDY OBJECTIVES

2.1 PRIMARY

The primary objective of the study is to assess the effect of the low dose prednisolone therapy on the time to progression of HIV disease. The time to progression is defined as the time between the baseline and the change of staging to advanced disease (CDC stage A3, B3 or C) or death (see Appendix Va).

2.2 SECONDARY

The following secondary objectives will be evaluated in the same patient population:

Amount of CD4 Cells
Overall survival
Safety profile
Quality of life
Immune system status, co-infections
Virus characterization by sequencing

PATIENT DEFINITION

This is a mono-centred trial involving 400 eligible patients.

3.1 INCLUSION CRITERIA

Positive HIV antibody test. The HIV infection has to be confirmed according to the WHO Guidelines (see Appendix IX).
Adult male or female patients, age ≥ 18 years.
Patients must have given an informed consent and signed a consent form prior to beginning protocol specific procedures (Appendix VI).
Patients in CDC Stage A 1, 2, B 1, 2 (see Appendix Va) not yet requiring ARVs.
CD4 cell count ≥ 300 cells/µl (for inclusion 300 cells/µl for reason of security).
No AIDS defining symptoms,
WHO Performance Status of 0,1,2 (see Appendix II).

3.2 EXCLUSION CRITERIA

No pregnancy. Female patients of childbearing potential must have a negative pregnancy test at study entry.
Prior therapy with ARVs.
Active tuberculosis.
Abnormal laboratory results especially glucose level > 160 mg/dl, liver enzymes (AST, ALT) ≥ 1,5 x ULN, bilirubin ≥ 4 x ULN, alkaline phosphatase ≥ 5 x ULN, creatinine > 2,0mg/dL (>176,8 µmol).
Serious other diseases, including psychiatric disorders.

PLAN OF STUDY

4.1 STUDY DESIGN

This is a double blinded, randomized, phase II placebo-controlled clinical trial of oral low dose prednisolone therapy for HIV infected patients with CDC Stage A1,2 or B1,2 (see Appendix Va).

The trial is a mono-centred and involves 400 eligible patients in Tanzania, divided in:

200 Patients in Study medication group
200 Patients in Placebo group

The study enrollment period will last for 12 month (30 patients per month). A study period of 24 month will follow. After 12 months, the first intermediate analysis will be done. In case of no significant negative safety aspects, the study will continue for the next 12 month. A follow-up period for further evaluation can be added.

4.2 STUDY TREATMENT

The patients in the Treatment Group will get prednisolone 5 mg per os daily. The placebo group will get one tablet of placebo per os daily.

4.3 DOSE MODIFICATION AND DELAY

There is no dose modification planned in this study. Study drug related reactions like hypersensitivity reactions, fluid retention, hypertension, gastric ulcer, and diabetes will be treated according to local standards.

4.4 DISCONTINUATION

Patients will be removed from the study for the following reasons:

disease progression: upgrading of clinical stage and/or CD4 cell count < 200/µl, both requiring the start of HAART ( = primary study objective, study completed);
development of unacceptable toxicity not manageable by symptomatic care;
administration of antiretroviral treatment;
significant protocol violation in the prednisolone group, e.g. interruption of taking the study medication for more than four weeks (compliance);
pregnancy;
consent withdrawn;
investigator's decision.

Patients are always allowed to refuse the participation of study and will be withdrawn.

The reason for removal for all patients will be documented on the case report form. Patients who are not eligible or not valuables for the study analysis will be replaced.

4.5 PRE-STUDY SCREEN

The following data will be obtained within two weeks prior to randomization:

informed consent and signed consent form (audio consent for illiterate persons);
complete medical history including dates and description of initial diagnosis of HIV infection, concurrent illnesses and concomitant medication;
physical examination including weight, height, WHO performance status (Appendix II);
vital signs: blood pressure, pulse rate, oral temperature;
HIV staging according to CDC: examination for AIDS defining signs and CD4 cell count;
chest x-ray to exclude active tuberculosis;
short quality of life score;
clinical laboratory tests: full blood count, glucose, liver enzymes (AST and/or ALT), bilirubin, alkaline phosphatase , creatinine; pregnancy test for female patients.

4.6 RANDOMIZATION

After having checked the patient's eligibility, the investigator will request randomization. A Randomization list will be provided to the BMC. The randomization number will be given by the study nurse. The study medication is double blind. Block randomization may be used.

4.7 EVALUATION DURING THE STUDY

4.7.1 EVALUATION EVERY VISIT (MONTH 0,1,2,3,4,5,6,9,12,15,18,21,24)

The patient will be examined every month for the following parameters:

medical history update, including documentation of concurrent conditions, hospitalization and concomitant medications;
quality of life score;
physical examination including weight and WHO performance status;
vital signs: blood pressure, pulse rate and oral temperature;
HIV staging according to CDC: examination for AIDS defining signs and CD4 cell count;
full haematological blood count;
serum chemistry: glucose level, liver enzymes (AST and/or ALT), bilirubin, alkaline phosphatase , creatinine;
pregnancy test for female patients.
toxicity evaluation: Toxicity is defined as a study drug related adverse event (AE) grade 3 (severe) or 4 (life threatening). Toxicity will be recorded as it occurs and graded according to the NCI Common Toxicity Criteria (see Appendix III). Toxicities that can not be graded using the NCI Common Toxicity Criteria will be recorded as mild (asymptomatic), moderate (symptomatic but not interfering significantly with function), severe (causing significant interference with function) or life-threatening.

4.7.2 EVALUATION EVERY 3 MONTH (IN ADDITION)

• Sputum test for Tuberculosis.

4.7.3 EVALUATION EVERY 6 MONTH (IN ADDITION)

Chest x-ray for Tuberculosis.
Sputum test for Tuberculosis.

STUDY ASSESSMENTS

5.1 EFFICACY ASSESSMENT

5.1.1 TIME TO PROGRESSION

The time to progression is defined as time period between the baseline and the change of staging( see appendix Va).

Progression is:

CD4 cell count ≤ 200 cells/µl; (Stage A3, B3 )
CDC clinical stage C; all counts;
death.

5.1.2 AMOUNT OF CD4 CELLS

The number of the CD4 cells at baseline (= 100%) will be compared to the number during the study (> 100%: increase; < 100%: decrease).

5.1.3 QUALITY OF LIFE

Some Quality of life questions will be completed for each patient during the visits.

5.1.4 OVERALL SURVIVAL

The duration of survival will be determined by measuring the time interval between the initial dose of study medication and the date of death. The overall survival will be evaluated in the prolonged follow up period of the study.

5.2 SAFETY ASSESSMENT METHODS

5.2.1 SUSPECTED ADVERSE RESPONSE (SUSAR), ADVERSE EVENT AND TOXICITY

Toxicity is defined as a study drug related Suspected Adverse Response (SUSAR) and Adverse events (AE) Grade 3 (severe) or 4 (life threatening). It will be evaluated based on a graded scale of 0-4 using the NCI Common Toxicity Criteria (see Appendix III). Toxicities that can not be graded using the NCI Common Toxicity Criteria will be graded as mild (asymptomatic), moderate (symptomatic but not interfering significantly with function), severe (causing significant interference with function) or life-threatening.

The SUSAR´s are:

Abdominal pain Hypertension Diabetes Hyperglycaemia Fluid retention Pneumonia Gastritis Weight gain

The AEs are:

Abdominal Pain Nausea Candidiasis Peptic ulcer Diarrhoea Pneumonia Fever Skin Herpes simplex,zoster Vomiting Hepatitis (liver function) Urinary tract infection

AEs and SUSARs will be monitored during every visit using a hard coded page in the case report form.

Additional AEs occurring can be added.

5.2.2 LABORATORY MEASUREMENTS

Biochemical and haematological tests will be conducted on blood samples once a month at every visit. If AEs occur additional tests have to be done according to local standards.

For later additional laboratory analysis a small amount of plasma samples and T-Cells will be stored at the National Institute for Medical Research. These samples will be analyzed in Germany (Medical Mission Institute, University of Wuerzburg) for identifying the status of activation of the immune system, co-infections and virus characterization.

ETHICAL CONSIDERATIONS

The study was approved at ethic board committees at the 21.02.2007 Approval Number: NIMR/HQ/R.8a/Vol.IX/518 Board Name: National Institute for Medical Research Tanzania Board Affiliation: Tanzania: Ministry of Health Phone: +255222121400 Email: headquarters@nimr.or.tz ethical and additionally at the 26.01.2007 Approval Number: CW 150/48 Board Name: Bugando Medical Center, Ethic board, Mwanza, Tanzania Board Affiliation: Bugando Medical Center Phone: +2550282500799 Email: infobmc@bugandomedicalcentre.go.tz