Compositions and methods for treatment of anorectal disorders
A composition, technology for rectal disease, applied to another type of composition for treating anorectal disease, using the field of β2 or β3 kidney
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Embodiment 1
[0135] This example illustrates the effect of cGMP alone, and in combination with a NO donor, using a rat internal anal sphincter (IAS) relaxation model.
[0136]Female Sprague-Dawley rats (300-400 g) were anesthetized with ketamine (90 mg / kg), injected intramuscularly with xylazine (9 mg / kg), and supplemented with 1 / 3 dose as needed. During the experiment, rats were loosely restrained supine on a warm operating table (Harvard Apparatus). A 24-gauge vascular cannula (VWR, San Francisco, CA) was inserted intraperitoneally and rehydrated with saline to counteract the diuretic effect of the anesthetic. Contraction / relaxation measurement components include: Millar cannula / sensor (diameter 1.67mm), connected to a Digi-Med low pressure analyzer (Micro-Med), with a range of -50-150mmHg. Data integration was performed with Digi-Med system integration software and converted into waveforms. Blood changes were monitored with an arterial cannula / sensor and a Digi-Med blood pressure anal...
Embodiment 2
[0142] In this example, a rat internal anal sphincter relaxation model is used to illustrate the effect of phosphodiesterase inhibitors.
[0143] Using the above experimental method, use of 20 μl of a 5% solution of zaprinast in 1-methyl-2-pyrrolidone reduced the mean IASP by 21% after 32 minutes compared to vehicle alone. A very small amount of NO donors, such as nitroglycerin, can further enhance the effect of phosphodiesterase inhibitors. Nitroglycerin can accelerate the onset of action and maintain sphincter relaxation, but it does not cause headaches that occur when high-dose NO donors are used alone. side effect.
Embodiment 3
[0145] In this example, a rat internal anal sphincter relaxation model is used to illustrate the effect of a potassium channel opener (minoxidil).
[0146] Using the above experimental method, a single use of 20 μl of 4% minoxidil solution prepared with 62.5% propylene glycol reduced the IASP by 64% after 2.5 hours. Carrier alone has almost no effect on IASP ( Figure 5 ).
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