Examination of Zinc, S-adenosylmethionine, and Combination Therapy Versus Placebo in Alcoholics (ExZACTO)

VA Office of Research and Development

Status: Completed

Conditions: Alcoholism

Treatments: Dietary Supplement: Zinc sulfate 220 mg once daily; Procedure: Bronchoscopy; Dietary Supplement: S-adenosylmethionine 400 mg twice daily

Study type: Interventional

Funder types: Other U.S. Federal agency

Identifiers

NCT01899521

IK2CX000643 (U.S. NIH Grant/Contract)

IRB00060773 (Other Identifier)

PULM-038-12S

Details and patient eligibility

About

This is a randomized, placebo controlled trial of dietary zinc and S-adenosylmethionine (SAMe) in otherwise healthy alcoholic US Veterans. The primary goal is to determine if either dietary zinc or S-adenosylmethionine (SAMe) can augment lung immune defenses in alcoholics and thereby decrease the risk of lung injury and infection.

Full description

Alcohol abuse is a major burden on society and even more of a problem in the Veteran population. Chronic alcohol ingestion can have serious health consequences including pneumonia and acute lung injury, which can occur suddenly and without warning even in physically fit individuals without apparent signs of alcohol dependence. Therefore, it is vital for the health of our Veterans and indeed the entire population to identify effective treatments that can limit or even prevent these devastating consequences. The primary goal of this clinical research project is to determine if dietary zinc or supplements of the antioxidant S-adenosylmethionine (SAMe) can augment lung immune defenses in otherwise healthy alcoholics and thereby decrease the risk of lung injury and infection. There is already strong evidence from the investigators' experimental animal model that moderate daily alcohol ingestion for as little as six weeks causes oxidative stress and zinc deficiency in the lung. These derangements result insult in dysfunction of the alveolar macrophage, which is the resident immune cell, and predisposes animals to the development of pneumonia. Importantly, in this same animal model, the investigators found that adding either zinc or antioxidants to the diet prevents these problems and preserves lung health even during daily alcohol ingestion.

This project will translate basic findings in the animal model to the clinical setting and determine whether or not zinc or SAMe supplements are effective in humans who pathologically consume alcohol. This project will enroll Veterans seen at the Atlanta Veterans Hospital in the Substance Abuse Treatment Program (SATP). Participants will be evaluated by undergoing a procedure to obtain samples of fluid from their lungs, measure zinc levels, redox potential, and assess how well their alveolar macrophages respond to bacteria (by determining phagocytic capacity). After completion of the initial evaluation, the participants will be randomized to receive standard treatment (placebo), zinc supplements, dietary SAMe, or the combination of zinc and SAMe for 14 days. All subjects will be evaluated for two weeks as they undergo treatment. At the end of this two week period, measurements of lung zinc, redox potential and macrophage function will be repeated and compared between the two groups. The hypothesis is that both dietary zinc and SAM supplements will improve the immune function of the alveolar macrophage.

If this project is successful, it will lead to larger clinical trials to determine if either dietary zinc and/or SAMe supplements can be effective even in the acute clinical setting and improve outcomes in alcoholics who develop pneumonia or acute lung injury. Overall, both zinc and SAMe supplements are safe and inexpensive to provide, allowing these potential treatments to be easily implemented in the Veteran population as well as society in general. Given the significant burden of unhealthy alcohol use, the investigators need ways to limit the physical consequences of alcohol abuse while the investigators continue the efforts at public education and addiction treatment.

Enrollment: 113 patients

Sex: All

Ages: 18 to 60 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Age 18-60 years
• Active alcohol use disorder

Exclusion criteria

• Any active and uncontrolled medical problem(s)

• Known zinc deficiency

• Primary substance of abuse something other than alcohol

• Current abnormal chest x-ray

• HIV-positive

• Any disorder of blood coagulation

• Currently on medical treatment with anti-coagulants, including:

  • warfarin
  • heparin
  • direct thrombin inhibitors
  • anti-platelet agents (other than Aspirin)

• Daily use of vitamins or other nutritional supplements (unless taking as treatment for alcohol use disorder)

• Renal impairment (GFR < 60)

• Active bipolar disorder

• Active Parkinson's disease

• Current pregnancy

• Contraindication to treatment with zinc or S-adenosylmethionine

• Inability to give informed consent (i.e., limited cognitive capacity)

• Non-English speaking

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

---

113 participants in 4 patient groups, including a placebo group

Placebo zinc and placebo SAMe

Placebo Comparator group

Description:

Placebo tablet of zinc sulfate once daily and placebo tablet of s-adenosylmethionine twice daily

Treatment:

Procedure: Bronchoscopy

Active zinc and placebo SAMe

Active Comparator group

Description:

Zinc sulfate 220 mg once daily and placebo tablet of s-adenosylmethionine twice daily

Treatment:

Procedure: Bronchoscopy

Dietary Supplement: Zinc sulfate 220 mg once daily

Placebo zinc and active SAMe

Active Comparator group

Description:

Placebo tablet of zinc sulfate once daily and s-adenosylmethionine 400 mg twice daily

Treatment:

Dietary Supplement: S-adenosylmethionine 400 mg twice daily

Procedure: Bronchoscopy

Active zinc and active SAMe

Active Comparator group

Description:

Zinc sulfate 220 mg once daily and s-adenosylmethionine 400 mg twice daily

Treatment:

Dietary Supplement: S-adenosylmethionine 400 mg twice daily

Procedure: Bronchoscopy

Dietary Supplement: Zinc sulfate 220 mg once daily