Clinical trial NCT06650384: Efficacy and Safety of N-Acetylcysteine Versus Alpha-Lipoic Acid in Colistin-Induced Nephrotoxicity
Official title: Evaluation of the Efficacy and Safety of N-Acetylcysteine Versus Alpha-Lipoic Acid on the Occurrence and Severity of Colistin-Induced Nephrotoxicity in Critically Ill Patients
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: PHASE2
PHASE3
Conditions: Nephrotoxicity
Keywords: N-Acetylcysteine
Alpha-Lipoic Acid
Colistin
Nephrotoxicity
Lead sponsor: Ain Shams University
Sponsor class: OTHER
First posted: 2024-10-21
Enrollment: 180
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: This study will be a prospective randomized controlled clinical trial Eligible patients will be randomly assigned by a 1:1:1 ratio using a computer-generated sequence to any of the 3 groups Group1 (n=60): colistin Group2 (n=60): colistin and N-Acetylcysteine Group3 (n=60): colistin and Alpha-lipoic acid
Primary purpose: PREVENTION

Brief summary: Healthcare- associated infections that caused by multi-drug-resistant Gram-negative bacteria (MDR G-ve) represent the most important problem that face the critically ill patients in the ICU. The available broad-spectrum antibiotics as penicillin, fluoroquinolones, aminoglycosides, and β-lactams fail to overcome these aggressive organisms. Accordingly, this led to the reconsideration of old drugs such as polymyxin B and polymyxin E (also known as colistin) that were previously considered to be too toxic for clinical use in the treatment of MDR G-ve bacteria. Colistin can be used as monotherapy or in combination with other antibiotics as high dose tigecycline, carbapenem or high-dose ampicillin/sulbactam.

Colistin associated acute kidney injury (CA-AKI) is the frequently observed side effect in ICU patients treated with colistin that may lead to cessation of treatment. Accordingly, it is important to monitor renal functions prior to and during colistin treatment to detect the early signs of renal injury and minimize long term renal dysfunction.

Inflammation with release of reactive oxygen species (ROS) can lead to renal tubular cells apoptosis. Several animal studies proved the beneficial effect of the concomitant use of antioxidants as N-acetylcysteine, alpha lipoic acid in preventing or attenuating colistin induced nephrotoxicity by their potent antioxidant effects Therefore, a clinical trial will be carried out to evaluate the efficacy and safety of N-acetylcysteine versus Alpha-lipoic acid in the prevention of colistin-induced nephrotoxicity in critically ill patients.

Detailed description: Nosocomial infections caused by multi-drug-resistant Gram-negative bacteria (MDR G-ve) bacteria, particularly Acinetobacter baumannii, Pseudomonas aeruginosa and Klebsiella pneumonia represent a crucial rapidly increasing health problem worldwide nowadays.

The available effective antibiotics, including broad-spectrum penicillin, fluoroquinolones, aminoglycosides, and β-lactams (carbapenems, monobactam, and cephalosporins) often fail to combat these organisms and the pharmaceutical pipeline is still facing the problem of lack of new moieties. The new and potent β-lactam/ β-lactamase combinations antibiotics "Tigecycline and other newer highly expensive β-lactam/ β-lactamase combinations as ceftazidime/avibactam, meropenem/vaborbactam "have their concerns related to their high cost and unavailability in all countries. Moreover, they are ineffective against Metallo-β-lactamase-producing CRE. Accordingly, this led to the reconsideration of old drugs such as polymyxin B and polymyxin E (also known as colistin) that were previously considered to be too toxic for clinical use in the treatment of MDR G-ve bacteria Colistin has re-emerged for treatment of severe infections caused by multidrug-resistant Gram-negative bacteria especially Pseudomonas aeruginosa, Acinetobacter baummannii, Klebsiella pneumonia and Enterobacterales .Colistin monotherapy or colistin based synergistic combinations with a carbapenem, high-dose ampicillin/sulbactam or high dose tigecycline represent the last resort option to overcome CR-GNB in critically ill patients. Colistin (colistimethate sodium) is the inactive prodrug that is hydrolyzed to colistin that act as a cationic detergent and disrupt the bacterial cytoplasmic membrane resulting in leak of intracellular substances and cell death.

Colistin associated acute kidney injury (CA-AKI) is frequently observed in the intensive care unit (ICU) patients treated with colistin especially in patients with advanced age, other comorbidities, baseline renal dysfunction and hemodynamically unstable patients Colistin is primarily eliminated renally and may induce acute kidney injury at a rate of up to 53% Many studies have discussed the prevalence of colistin induced nephrotoxicity. One recent study in 2023 stated that the incidence of nephrotoxicity was 44.9% (95% CI; 37% to 53%) and its severity according to Kidney Disease Improving Global Outcomes (KDIGO) guidelines in 2012 was stage1 (47%), stage2 (21%) and stage3 (31%). Accordingly, it is important to monitor renal functions prior to and during colistin treatment to detect the early signs of renal injury and minimize long term renal dysfunction. A serum creatinine (SCr) is commonly used for estimation of renal function.

Cockcroft-Gault equation is the most common formula for determining creatinine clearance which estimates glomerular filtration rate (GFR). Although creatinine clearance may over-estimate GFR by (10-20%) but still remains the standard for drug dosing adjustments.

Accordingly, it is important to monitor renal functions prior to and during colistin treatment to detect the early signs of renal injury.

Inflammation with the release of many cytokines into the renal tubular cells, oxidative stress, the increased release of reactive oxygen species (ROS). Also, excessive free radical production and low antioxidant level which lead to renal tubular cells apoptosis with an effect on the mitochondria as a primary site of damage.

Mechanism of colistin induced nephrotoxicity is similar to that of contrast induced nephrotoxicity, the nephrotoxic effect of methotrexate/cisplatin (MTX/CPT) and vancomycin induced nephrotoxicity.

In several animal studies, the concomitant use of antioxidants as N-acetylcysteine, alpha lipoic acid, vitamin E, melatonin and ascorbic acid with colistin have shown promising results in preventing or attenuating colistin induced nephrotoxicity by their potent antioxidant effects that decrease ROS levels and cellular apoptosis.

NAC acts as a glutathione precursor that plays an important role in increasing the glutathione S- transferase activity that decrease the oxidative stress by neutralizing ROS Animal studies found that N-Acetylcysteine seems to have a beneficial role in the restoration of the oxidant injury caused by colistin and prevention of colistin-induced nephrotoxicity by its antioxidant effect. Nevertheless, one clinical study stated that N-Acetylcysteine 1200 mg /day did not have any effect on the prevention of colistin-induced nephrotoxicity. Double dose of N-acetylcysteine (1200 mg orally twice daily) seemed to be more effective than the standard dose (600 mg orally twice daily) in preventing contrast agent associated nephrotoxicity.

Also, the efficacy of NAC in the prevention of vancomycin induced nephrotoxicity was shown in a randomized controlled clinical trial in 2020.The mechanism of colistin induced nephrotoxicity is similar to that of contrast and vancomycin Alpha-lipoic acid (ALA) known as thioctic acid "600 mg twice daily "is an organosulfur compound found in the mitochondria. It is necessary for many enzymatic functions and can prevent nephrotoxicity through its strong antioxidant properties that act as a free radical scavenger and regenerator of endogenous antioxidants. Up till now, only one study on rats have demonstrated that ALA is an effective strategy for alleviation of colistin induced nephrotoxicity by its strong antioxidant effect.

An animal study on rats proved that the potent antioxidant, Alpha-lipoic acid (10mg/kg), attenuated nephrotoxicity induced by MTX/CPT by enhancing the activities of mitochondrial enzymes and decreasing levels of reactive oxygen species. The mechanism of colistin induced nephrotoxicity is similar to that of methotrexate/cisplatin.

Objectives: To evaluate the efficacy and safety of high dose N-acetylcysteine versus alpha-lipoic acid on the occurrence and severity of colistin-induced nephrotoxicity in critically ill patients by assessment of the following:

1. Efficacy parameters:

   * Occurrence and severity of nephrotoxicity
   * Clinical outcomes (ICU stay, mortality, dose modification and need for dialysis)
2. Safety parameters:

   * Occurrence of ARDs Methodology
   * As per our protocol, critically ill patients ≥ 18 years presenting to the critical care medicine Department-Cairo University Hospitals and initiating treatment with colistin for suspected or confirmed multi-drug-resistant Gram-negative bacterial infection (per culture) will be recruited.

     180 Eligible patients will be randomly assigned by a 1:1:1 ratio using a computer-generated sequence to any of the following 3 groups:
   * Group1 (n=60): will receive (IV) colistin 300 mg CBA loading dose, followed 12 hours later by a maintenance dose of 150-180 mg CBA twice daily based on Crcl calculated using Cockcroft -Gault equation . - Group2 (n=60): will receive (IV) colistin 300mg CBA loading dose followed by a maintenance dose of 150-180 mg CBA twice daily based on Crcl calculated using Cockcroft -Gault equation in addition to enteral sachets of N-acetyl cysteine 1200 mg twice/day (acetylcysteine 600mg sachets produced by South Egypt Drug Industries Company, SEDICO).
   * Group3 (n=60): will receive (IV) colistin 300mg CBA loading dose followed by a maintenance dose 150-180 mg CBA twice daily based on Crcl calculated using Cockcroft -Gault equation in addition to enteral Alpha-lipoic acid 600mg twice daily (thiotacid 600mg produced by EVA PHARM) before meals.

Every patient in the study will be subjected to the following:

1. Data collection

Data will be collected at baseline and at regular intervals from patient's medical files for all groups and this includes:

1. Patients demographic (gender, age, weight), Histories (social, medications) and pre-existing comorbid conditions and source of infection.

b. Severity scores for illness evaluation (baseline and at the end) "Acute Physiology and Chronic Health Evaluation II (APACHE II score), Sequential Organ Failure Assessment (SOFA score)" c- All culture results and susceptibilities. d-The use of other potentially nephrotoxic drugs will be recorded 2- Laboratory evaluation will be done initially and every other day up to the end of the duration of colistin treatment in the 3 groups for the following: Complete blood count (CBC) including total leucocytic count (TLC), hemoglobin (Hgb), platelets (PLT) count, inflammatory markers (C- reactive protein), urine output (UOP), renal functions BUN, SCr , Crcl that can be predicted from serum creatinine value using Cockcroft-Gault equation.

3- Vital signs assessments including (blood pressure, heart rate, temperature) at baseline and every other day till the end of colistin therapy 4- Clinical outcomes evaluation

-Assessment of Colistin Induced nephrotoxicity

All patients in the 3 groups will be assessed daily for the occurrence and severity of colistin induced nephrotoxicity defined by the KIDIGO, 2012 as:

Definition of Colistin induced Nephrotoxicity according to KDIGO staging (2012).

Moreover, the following will be reported for all patients:

- Average dose of colistin used daily during the duration of its use. Average duration of colistin use according to the type of infection and the clinical response.

-Other clinical outcomes: 5. Total length of ICU stays 6. Need for dose modification according to creatinine clearance 7. Need for hemodialysis 8. Mortality 4. Safety assessment: All adverse drug reactions will be monitored and reported for the 3 groups

Eligibility criteria: Inclusion Criteria:

1. Adult patients ≥ 18 years
2. Critically ill patients initiating treatment with colistin for suspected or confirmed multi-drug-resistant Gram-negative bacterial infection as per culture

Exclusion Criteria:

1. Patient is in AKI according to KDIGO guidelines in 2012 KDIGO.org. Accessed at 17/2/2024)
2. Any kidney disorder including (glomerulonephritis, polycystic kidney disease, kidney stones, interstitial nephritis, renal artery stenosis and renal carcinoma).
3. Known allergy to colistin, N-acetylcysteine or alpha-lipoic acid
4. Patients with factors requiring NPO (nothing per oral)

Primary outcomes:
measure: Occurrence of colistin induced nephrotoxicity
timeFrame: Starting from randomization date till patient ICU discharge, death from any cause or colistin discontinuation, whichever comes first, up to 14 days
Secondary outcomes:
measure: Need for dose modification or hemodialysis
timeFrame: Starting from randomization date till patient ICU discharge, death from any cause or colistin discontinuation, whichever comes first, up to 14 days
measure: Mortality
timeFrame: Starting from randomization date till patient ICU discharge, death from any cause, whichever comes first, up to 30 days
measure: Length of ICU stay from the start of colistin / colistin and interventional drug
timeFrame: Starting from randomization date till patient ICU discharge, death from any cause, whichever comes first, up to 30 days
measure: Total duration of ICU stay
timeFrame: Starting from ICU admission till patient ICU discharge, death from any cause, whichever comes first, up to 90 days
measure: Incidence and frequency of occurrence of interventional drugs adverse events
timeFrame: Starting from addition of the interventional drugs to colistin till patient ICU discharge, death from any cause or colistin discontinuation, whichever comes first, assessed up to 14 days
Other outcomes:
Locations:
city: Cairo
country: Egypt
facility: Critical Care Medicine Department,Cairo University Hospitals
Study officials:
affiliation: Critical Care Medicine Department, Cairo University Hospitals, Cairo, Egypt
name: Dina H El Adly, MSc
role: PRINCIPAL_INVESTIGATOR
affiliation: Department of Clinical Pharmacy, Faculty of Pharmacy, Ain Shams University,Cairo, Egypt
name: Lamia M El Wakeel, PhD
role: STUDY_DIRECTOR
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