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70 results about "Systemic absorption" patented technology

Systemic absorption. Uptake to the blood and transport via the blood of a substance to an organ or compartment in the body distant from the site of absorption. (You must log in first to edit the definition.)

Azithromycin ultrafine powder in-situ gel eye drops and preparation method thereof

InactiveCN102106812AHelps maintain effective concentrationImprove topical bioavailabilityAntibacterial agentsOrganic active ingredientsBacterial keratitisEye drop
The invention provides azithromycin ultrafine powder in-situ gel eye drops and a preparation method thereof. The method comprises the following steps of: firstly, micronizing a medicament by using a proper method to remarkably improve the dissolution rate and solubility of the medicament; and secondly, preparing an ophthalmic preparation which is in a liquid state in vitro and is in a gel state when dripped into eyes by adopting sodium alginate as an ion-sensitive gel matrix or adopting poloxamer 407 and poloxamer 188 as thermosensitive gel matrixes. The eye drops are steady in storage at 4 DEG C and uniform in content, and are not required for secondary preparation so as to reduce contamination. In the method, azithromycin ultrafine powder and in-situ gel are combined for the treatment of bacterial keratitis and trachoma; and by the dual effects of the ultrafine powder and the gel, the sustained release effect is achieved when the retention time of the preparation in the eyes is prolonged, so that the local bioavailability of the medicament and the compliance of patients are improved, and the medicament absorption of the cornea is increased to reduce the toxic or side effect caused by the systemic absorption of ophthalmic medicaments.
Owner:SHENYANG PHARMA UNIVERSITY

Oral delivery of angiotensin converting enzyme 2 (ACE2) or angiotensin-(1-7) bioencapsulated in plant cells attenuates pulmonary hypertension, cardiac dysfunction and development of autoimmune and experimentally induced ocular disorders

ActiveUS20160331816A1Improved right heart functionDecreased pulmonary vessel wall thicknessPowder deliveryPeptide/protein ingredientsDiseaseUveitis
Emerging evidence indicates that diminished activity of the vasoprotective axis of the renin-angiotensin system, constituting angiotensin converting enzyme2 (ACE2) and its enzymatic product, angiotensin-(1-7) [Ang-(1-7)] contribute to pulmonary hypertension (PH). However, clinical success for long-term delivery of ACE2 or Ang-(1-7) would require stability and ease of administration to increase patient compliance. Chloroplast expression of therapeutic proteins enables their bioencapsulation within plant cells to protect from acids and gastric enzymes; fusion to a transmucosal carrier facilitates effective systemic absorption. Oral feeding of rats with bioencapsulated ACE2 or Ang-(1-7) attenuated monocrotaline (MCT)-induced increase in right ventricular systolic pressure, decreased pulmonary vessel wall thickness and improved right heart function in both prevention and reversal protocols. Furthermore, combination of ACE2 and Ang-(1-7) augmented the beneficial effects against cardio-pulmonary pathophysiology induced by MCT administration.
Experiments have also been performed which indicate that this approach is also suitable for the treatment or inhibition of experimental uveitis and autoimmune uveoretinitis These studies provide proof-of-concept for a novel low-cost oral ACE2 or Ang-(1-7) delivery system using transplastomic technology for pulmonary and ocular disease therapeutics.
Owner:THE TRUSTEES OF THE UNIV OF PENNSYLVANIA +1
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