Nanotechnology refers to the manipulation of substances on the atomic and molecular level. Liposomes are small encapsulating bubbles that are microscopic in size, made of materials called phospholipids that mimic human cells, and have the property of being both attracted and repelled by water. Liposomal formulation includes the process that forms those bubbles, as well the encapsulation and delivery of the drugs contained within.
First appearing during the 1960s, the importance of these tiny vesicular structures that enclose water-soluble molecules soon became apparent. Researchers and pharmacists became aware of their potential to deliver specific drugs used in the treatment of cancer and other serious diseases. The process encourages more accurate targeting of unhealthy cells and avoids problems associated with other types of administration.
Unlike most other delivery systems, these formulations do not rely on modes of absorption typical to oral or direct IV administration. Conventional delivery can make it harder to manage the effects of specialized drugs, and one common result is the accumulation of toxic materials in other organs, often causing additional and undesired damage. When the medication is placed inside each bubble-like liposome, release can be more easily controlled.
The molecules of a drug are suspended in water within the structure of the artificial cell, which is surrounded by a manufactured membrane. The formulating process of specifically designed liposomes transforms them into mechanisms ideal for transporting hydrophilic drugs, or those that are attracted to water and dissolve effectively. Current methods produce two primary forms called unilammelar and multilammelar, and subcategories include varying sizes.
Individual liposomes surround the drug molecules with a membrane, and then transfer those medications to other cells when activated. Molecules can be released into the body by fusing certain layers with other physical cells, effectively delivering a small amount of medication. Others strategies rely on chemical reactions that encourage diffusion on a molecular level. The net result is a steadier, more controlled release.
Not only can this process be more easily managed by physicians, but it leaves no residual toxins behind, and is compatible biologically with human cells. Comparatively recent developments in ultrasound technology use sound waves to activate these chemical invaders, increasing their strength in regions where it is most needed. Others are being administered via the respiratory system, where they are deposited in the lungs and slowly released.
It is still costly to manufacture these microscopic capsules for medical use. As continuing research produces a growing number of uses for this kind of nanotechnology, the overall expense will decline, but will not become cheap. Because this is relatively new technology in many ways, there are issues that still must be resolved. Some types of structures have experienced cellular leaking, and others have been affected by oxidation.
Like other technologies developed for medicine, liposomes have a growing commercial use. They are being touted as superior methods of delivering vitamin, mineral, and herb formulations, and some individuals today even create their own supplements. While those uses are controversial in some aspects, the creation of new medication delivery and activation systems continues to provide new hope for more effective treatments.
First appearing during the 1960s, the importance of these tiny vesicular structures that enclose water-soluble molecules soon became apparent. Researchers and pharmacists became aware of their potential to deliver specific drugs used in the treatment of cancer and other serious diseases. The process encourages more accurate targeting of unhealthy cells and avoids problems associated with other types of administration.
Unlike most other delivery systems, these formulations do not rely on modes of absorption typical to oral or direct IV administration. Conventional delivery can make it harder to manage the effects of specialized drugs, and one common result is the accumulation of toxic materials in other organs, often causing additional and undesired damage. When the medication is placed inside each bubble-like liposome, release can be more easily controlled.
The molecules of a drug are suspended in water within the structure of the artificial cell, which is surrounded by a manufactured membrane. The formulating process of specifically designed liposomes transforms them into mechanisms ideal for transporting hydrophilic drugs, or those that are attracted to water and dissolve effectively. Current methods produce two primary forms called unilammelar and multilammelar, and subcategories include varying sizes.
Individual liposomes surround the drug molecules with a membrane, and then transfer those medications to other cells when activated. Molecules can be released into the body by fusing certain layers with other physical cells, effectively delivering a small amount of medication. Others strategies rely on chemical reactions that encourage diffusion on a molecular level. The net result is a steadier, more controlled release.
Not only can this process be more easily managed by physicians, but it leaves no residual toxins behind, and is compatible biologically with human cells. Comparatively recent developments in ultrasound technology use sound waves to activate these chemical invaders, increasing their strength in regions where it is most needed. Others are being administered via the respiratory system, where they are deposited in the lungs and slowly released.
It is still costly to manufacture these microscopic capsules for medical use. As continuing research produces a growing number of uses for this kind of nanotechnology, the overall expense will decline, but will not become cheap. Because this is relatively new technology in many ways, there are issues that still must be resolved. Some types of structures have experienced cellular leaking, and others have been affected by oxidation.
Like other technologies developed for medicine, liposomes have a growing commercial use. They are being touted as superior methods of delivering vitamin, mineral, and herb formulations, and some individuals today even create their own supplements. While those uses are controversial in some aspects, the creation of new medication delivery and activation systems continues to provide new hope for more effective treatments.
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