S-์๋ฐ๋ ธ์ค๋ฉํฐ์ค๋ (SAMe)
**S-์๋ฐ๋ ธ์ค๋ฉํฐ์ค๋ (SAMe)**์ ์ฒด๋ด์ ์์ฐ์ ์ผ๋ก ์กด์ฌํ๋ ๋ด์ธ์ฑ ๋ถ์๋ก, ์์ํ์์ ์ฃผ๋ก **๊ฐ์ฅ ๋ณดํธ์ **๋ก ๋๋ฆฌ ์ฌ์ฉ๋๋ ์์ ๋ณด์กฐ์ ์ ๋๋ค. ์ฃผ์ ์์ ์ ์ฉ ๋ถ์ผ: * **๊ฐ ์งํ**: ๋ง์ฑ ๊ฐ์ผ, ์ง๋ฐฉ๊ฐ, ๋ด๊ด๊ฐ์ผ ๋ฐ ๊ณ ์์ด ์ธ๋๋ฐ์งํ์ ๋ณด์กฐ ์น๋ฃ์ ๋ก ์ฌ์ฉ๋ฉ๋๋ค. * **๋ ์ฑ ๊ด๋ฆฌ**: ๊ณ ๊ฐ๋ ๊ธ๋ฃจํ์น์จ์ ๋ณด์ถฉํ์ฌ **์์ธํธ์๋ฏธ๋ ธํ**์ด๋ **์์ผ๋ฆฌํจ** ์ค๋ ๊ณผ ๊ฐ์ ๊ธ์ฑ ๊ฐ๋ ์ฑ ๋ฌผ์ง์ ์ํ ๊ฐ ์์ ์น๋ฃ์ ์ค์ํ ์ญํ ์ ํฉ๋๋ค. * **๊ธฐํ ์ฉ๋**: ๊ณจ๊ด์ ์ผ, ์ฐ๋ น ๊ด๋ จ ์ธ์ง ๊ธฐ๋ฅ ์ฅ์ (๊ฐ ์ธ์ง ๊ธฐ๋ฅ ์ฅ์ ์ฆํ๊ตฐ) ๋ฐ ๊ฐ๋ ์ฑ ์ ์ฌ๋ ฅ์ด ์๋ ์ฝ๋ฌผ(์: ํ๋ ธ๋ฐ๋ฅด๋นํ)์ ์ฅ๊ธฐ ๋ณต์ฉํ๋ ํ์์๊ฒ ์ ์ตํ ์ ์์ต๋๋ค. > **์์ ํ**: ์์ํ SAMe๋ ๋ฐ์์ฑ์ด ๋๊ณ ๋ถ์์ ํ๊ธฐ ๋๋ฌธ์ ์์ฉํ๋ ์ ํ์ ์์ ์ฑ์ ๋์ด๊ธฐ ์ํด ๋ค์ํ ์ผ(์: ํ ์ค์ฐ์ผ) ํํ๋ฅผ ์ฌ์ฉํฉ๋๋ค. ์ ํ ๊ฐ ์์ฒด ์ด์ฉ๋ฅ ์ฐจ์ด๊ฐ ํฌ๋ฏ๋ก ์ ๋ขฐํ ์ ์๋ ์์ํ ์ ์ฉ ๋ธ๋๋๋ฅผ ์ ํํ๋ ๊ฒ์ด ๊ฐ๋ ฅํ ๊ถ์ฅ๋ฉ๋๋ค.
์์ฉ ๊ธฐ์ : SAMe is synthesized from the amino acid methionine and ATP via the enzyme **SAMe synthetase**. In liver compromise, this enzyme's activity is a rate-limiting step, leading to systemic SAMe deficiency. Exogenous SAMe bypasses this block and participates in three major biochemical pathways: * **Transsulfuration** โ Generates sulfur-containing compounds โ Precursor to **Glutathione (GSH)**. Glutathione is the liver's master antioxidant, essential for ROS scavenging and cellular detoxification. Exogenous SAMe prevents GSH depletion. * **Transmethylation** โ Serves as a methyl donor โ Essential for phospholipid synthesis (e.g., phosphatidylcholine) โ Maintains cell membrane structure, fluidity, and function. * **Aminopropylation** โ Donates aminopropyl groups โ Source of polyamines โ Promotes anti-inflammatory effects, protein/DNA synthesis, and **hepatocyte replication/regeneration**. Additionally, SAMe inhibits hepatocyte apoptosis secondary to alcohol or bile acid accumulation.
๋๋ฌผ ์ข ๋ณ ์ฉ๋
- General dosing / Liver support ยท 18 mg/kg (or based on weight: <5.5 kg: 90 mg; 5.5-11 kg: 180-225 mg) ยท PO ยท q24h ยท Give on an empty stomach, at least one hour before feeding.
- Liver Disease (necro-inflammatory/cholestatic, feline hepatic lipidosis) ยท 20 mg/kg ยท PO ยท q24h ยท Give on an empty stomach; use a proven bioavailable product.
- Liver disease, cognitive dysfunction, improve bile flow ยท 100 mg/cat or 20 mg/kg ยท PO ยท q24h ยท Long-term as needed ยท Administer on an empty stomach at least 1 hour before food. Tablets should be given whole.
- General dosing / Liver support ยท 18 mg/kg (or based on weight: <5.5 kg: 90 mg; 5.5-11 kg: 180-225 mg; 11-16 kg: 225 mg; 16-29.5 kg: 450 mg; 29.5-41 kg: 675 mg; >41 kg: 900 mg) ยท PO ยท q24h (may divide q12h if giving >1 tablet) ยท Give on an empty stomach, at least one hour before feeding.
- Liver Disease (necro-inflammatory/cholestatic, vacuolar hepatopathy) ยท 20 mg/kg ยท PO ยท q24h ยท Give on an empty stomach; use a proven bioavailable product.
- Liver disease, cognitive dysfunction, adjunctive therapy ยท At least 100 mg for every 10 kg or 20 mg/kg ยท PO ยท q24h ยท Long-term as needed ยท Administer on an empty stomach at least 1 hour before food. Tablets should be given whole.
์ฉ๋์ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์ฐธ๊ณ ์๋ฃ์ ๋๋ค. ํญ์ ์ต์ ๋ผ๋ฒจ๊ณผ ๊ฐ๋ณ ํ์์ ๋ํด ํ์ธํ์ญ์์ค.
ํฌ์ฌ ๊ฒฝ๋ก
๊ธ๊ธฐ
- No absolute contraindications
- Use with caution in pregnant animals (safety not definitively proven)
- No absolute contraindications documented
- Use with caution during pregnancy (safety not established)
์ด์๋ฐ์
- Immediate post-dose vomiting
- Anorexia
- Anxiety
- Nausea (reported in humans)
- Diarrhea (reported in humans)
- Flatulence (reported in humans)
- Nausea
- Vomiting
- Diarrhoea
- Paradoxical anxiety
- Dry mouth (reported in humans)
- Headache (reported in humans)
- Sweating (reported in humans)
- Dizziness (reported in humans)
์ฝ๋ฌผ ์ํธ์์ฉ
- Tramadol ยท Theoretical risk of additive serotonergic effects (serotonin syndrome) ยท major
- Meperidine ยท Theoretical risk of additive serotonergic effects ยท major
- Dextromethorphan ยท Theoretical risk of additive serotonergic effects
- Pentazocine ยท Theoretical risk of additive serotonergic effects ยท major
- Monoamine oxidase inhibitors (MAOIs) (e.g., selegiline) ยท Theoretical risk of additive serotonergic effects
- Selective serotonin reuptake inhibitors (SSRIs) (e.g., fluoxetine) ยท Theoretical risk of additive serotonergic effects
- Tricyclic antidepressants (TCAs) (e.g., amitriptyline, clomipramine) ยท Theoretical risk of additive serotonergic effects
- Selegiline ยท Additive serotonergic effects; potential for serotonin syndrome ยท major
- Fluoxetine ยท Additive serotonergic effects; potential for serotonin syndrome ยท major
- Clomipramine ยท Additive serotonergic effects; potential for serotonin syndrome ยท major
- Amitriptyline ยท Additive serotonergic effects; potential for serotonin syndrome ยท major
- Paracetamol ยท SAMe may increase the clearance of drugs undergoing hepatic glucuronidation ยท moderate
๋ชจ๋ํฐ๋ง
- Clinical signs (appetite, activity, attitude)
- Liver enzymes (ALT, AST, ALP, GGT)
- Bilirubin
- Bile acids
- Liver biopsies (if indicated)
- Hepatic and erythrocyte glutathione levels (Note: may require 1-4 months before changes in lab values are noted)
- Liver enzyme panel (ALT, AST, ALP, GGT)
- Total bilirubin and bile acids
- Clinical signs of cognitive improvement or behavioral changes
- Signs of serotonin syndrome (agitation, tremors, hyperthermia) if used concurrently with serotonergic drugs
๊ณผ์ฉ๋
SAMe appears to be quite safe. The LD50 in rodents exceeds 4.65 grams/kg. Toxicity studies in dogs and cats at usual prescribed dosages demonstrated no deleterious effects. In the event of a massive overdose, mild gastrointestinal effects (nausea, vomiting, diarrhea) may be observed, but it is highly unlikely to require specific medical treatment beyond supportive care.
VetSheet ์ฝ๋ฌผ ๋ ํผ๋ฐ์ค๋ ๋ฉดํ ์์ ์ ๋ฌธ๊ฐ๋ฅผ ์ํ ์์ ์์ฌ๊ฒฐ์ ๋ณด์กฐ ๋๊ตฌ์ด๋ฉฐ, ์ ๋ฌธ์ ํ๋จ์ด๋ ์ ์กฐ์ฌ์ ์ต์ ๋ผ๋ฒจ์ ๋์ ํ์ง ์์ต๋๋ค.