About Lubiprostone API
Therapeutic Category 胃腸疾患(GI)

CAS Number
136790-76-6
API Technology
Prostaglandins
Dose Form
Oral Solid/Capsules
Dr Reddy's Development Status
Available
Available Regulatory Filing
USDMF
Mechanism of Action
Lubiprostone is a locally acting chloride channel activator that enhances a chloride-rich intestinal fluid secretion without altering sodium and potassium concentrations in the serum. Lubiprostone acts by specifically activating ClC-2, which is a normal constituent of the apical membrane of the human intestine, in a protein kinase A–independent fashion.
By increasing intestinal fluid secretion, lubiprostone increases motility in the intestine, thereby facilitating the passage of stool and alleviating symptoms associated with chronic idiopathic constipation. Patch clamp cell studies in human cell lines have indicated that the majority of the beneficial biological activity of lubiprostone and its metabolites is observed only on the apical (luminal) portion of the gastrointestinal epithelium.
Lubiprostone, via activation of apical ClC-2 channels in intestinal epithelial cells, bypasses the antisecretory action of opiates that results from suppression of secretomotor neuron excitability.
Activation of ClC-2 by lubiprostone has also been shown to stimulate recovery of mucosal barrier function and reduce intestinal permeability via the restoration of tight junction protein complexes in ex vivo studies of ischemic porcine intestine.
Indication
Amitiza is a chloride channel activator indicated for the treatment of:
- Chronic idiopathic constipation (CIC) in adults.
- Opioid-induced constipation (OIC) in adult patients with chronic, non-
- Cancer pain, including patients ith chronic pain related to prior cancer or its treatment who do not require frequent (e.g., weekly) opioid dosage escalation.
- Limitations of Use: Effectiveness of Amitiza in the treatment of OIC in patients taking diphenylheptane opioids (e.g., methadone) has not been established.
- Irritable bowel syndrome with constipation (IBS-C) in women ≥ 18 years old.
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