Nanotechnology is a dynamic branch of science that transforms and manipulates substances on a molecular and even atomic level. Liposomes refer to microscopic cellular bubbles made of materials called phospholipids, which are similar to human cell material and are both attracted to and repelled by water. Liposomal formulation helps create these structures for use in the targeted delivery of medication.
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.
The liposomes are made to surround the medications with membranes, and when activated release those molecules into other cells. This can be done by fusing the layers, causing them to interact with adjacent human cells, and releasing medication in the process. Other activation strategies include using specific chemical reactions to encourage molecular diffusion. The end result is a controlled, steady delivery.
This process is not only more effectively managed, but is also bio-compatible with human cells, and leaves no additional toxic residue. Some recently developed types of these capsules can be activated using ultrasound, which increases their efficacy in the locations where they are most needed. Others are dispensed via the respiratory system, and are directly deposited into the lungs and then slowly released, reducing overall toxicity.
It is still comparatively costly to manufacture these microscopic capsules. As practicality increases and research finds new uses and procedures, expenses will probably decrease, but still remain high. As is the case in most newer technologies, there are still many unresolved issues. Some forms of these artificial cells have had problems with wall or membrane leakage, while others have been degraded by oxidation and other natural processes.
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.
The liposomes are made to surround the medications with membranes, and when activated release those molecules into other cells. This can be done by fusing the layers, causing them to interact with adjacent human cells, and releasing medication in the process. Other activation strategies include using specific chemical reactions to encourage molecular diffusion. The end result is a controlled, steady delivery.
This process is not only more effectively managed, but is also bio-compatible with human cells, and leaves no additional toxic residue. Some recently developed types of these capsules can be activated using ultrasound, which increases their efficacy in the locations where they are most needed. Others are dispensed via the respiratory system, and are directly deposited into the lungs and then slowly released, reducing overall toxicity.
It is still comparatively costly to manufacture these microscopic capsules. As practicality increases and research finds new uses and procedures, expenses will probably decrease, but still remain high. As is the case in most newer technologies, there are still many unresolved issues. Some forms of these artificial cells have had problems with wall or membrane leakage, while others have been degraded by oxidation and other natural processes.
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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