What is pH responsive and temperature responsive delivery?
Dual pH and thermo-responsive carriers are being considered as next-generation drug delivery systems, which are capable of releasing drugs intelligently in response to external or internal stimuli. These systems are characterized by minimal toxicity, improved therapeutic efficacy and reduced exposure to normal cells.
What are the advantages of using nanocapsules to deliver drugs in the body?
Their main advantages are namely sustained release, incremental drug selectivity and effectiveness, improvement of drug bioavailability and alleviation of drug toxicity. Nanocapsules, which are submicron in size, when administered intravenously, reach to the target and release the encapsulated drug.
Is pH sensitive to temperature?
*pH decreases with increase in temperature. But this does not mean that water becomes more acidic at higher temperatures. A solution is considered as acidic if there is an excess of hydrogen ions over hydroxide ions. At 100°C, a pH value of 6.14 is the New neutral point on the pH scale at this higher temperature.
Why are liposomes good for drug delivery?
Liposomes protect some drugs against chemical and immunological breakdown, as well as protecting them against the effect of enzymes. Liposomes give lowered toxicity and lower dosing because of sustained drug levels, especially when so called “stealth” liposomes are used [38].
What are nanocapsules made of?
A nanocapsule is a nanoscale shell made from a nontoxic polymer. They are vesicular systems made of a polymeric membrane which encapsulates an inner liquid core at the nanoscale.
What is the size of nano capsules?
The size of nanocapsules varies from 5 to 1000 nm, but generally they are 100–500 nm. It is a submicroscopic colloidal drug carrier system. Nanocapsules can be prepared by using natural or synthetic polymers.
How does nanoparticle drug delivery work?
Perhaps the most publicized use of nanotechnology in drug delivery under development is the use of nanoparticles to deliver drugs to cancer cells. Particles are engineered so that they are attracted to diseased cells, which allows direct treatment of those cells.
How are nanocapsules used?
They are vesicular systems made of a polymeric membrane which encapsulates an inner liquid core at the nanoscale. Nanocapsules have many uses, including promising medical applications for drug delivery, food enhancement, nutraceuticals, and for self-healing materials.
How does temperature effect pH?
*pH decreases with increase in temperature. In the case of pure water, there are always the same concentration of hydrogen ions and hydroxide ions and hence, the water is still neutral (even if its pH changes). At 100°C, a pH value of 6.14 is the New neutral point on the pH scale at this higher temperature.
