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Part of the book series: Healthy Ageing and Longevity ((HAL,volume 13))

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Abstract

While the characterization of the physicochemical properties of a nanocarrier as presented in Chap. 3 is crucial to the evaluation and subsequent optimization of the carrier performance, as the ultimate goal of the development of a carrier is to enhance the efficiency of systemic delivery in a biological body, in vivo assessment of the carrier is unavoidable. In vivo assessment gives information about the mechanism of action, pharmacokinetics, and pharmacodynamics of the agent administered. Over the years, many animal models have been used for studying the in vivo performance of a drug, which in this case is either a free drug or a drug that has been pre-loaded into a carrier. Rodents like rats, mice, guinea pigs, and rabbits are the commonly used animals. Recently, zebrafish invertebrate models have also been established and used in in vivo studies. They are now used widely as a screening model to assess the in vivo performance of many drugs. Regarding the importance of in vivo assessment in the design and use of systemic delivery technologies in anti-aging medicine, in this chapter, we will describe the various in vivo techniques for the assessment of drug delivery.

V. K. Ameena Shirin and Renu Sankar: These authors have contributed equally to this chapter.

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Correspondence to Kannissery Pramod .

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Glossary

Bioavailability

It is the rate and extent of drug absorption to the circulatory system of the body from the site of administration.

Biocompatibility

It is the ability of a material being compatible with living tissues.

Bioluminescence

It is the production and emission of light by living organisms.

First-pass metabolism

It is a process that results in the reduction of drug concentration before reaching the systemic circulation when it is administered orally.

In vitro studies

Experiments performed outside of living organisms, such as in glass apparatus.

In vivo studies

Experiments for the determination of effects of the drug or other entities in a living organism like cells, tissues, or whole organisms, especially in animals and humans.

Pharmacodynamics

It is the study of the physiological and biochemical effects of a drug in the body after its administration.

Pharmacokinetics

It is the study of the time course of absorption, distribution, metabolism, and excretion of drugs.

Solubility

It is the maximum amount of solute dissolved per unit volume of a given solvent at equilibrium.

Systemic delivery

It is the administration of drugs to the body of the patient systemically through intravenous, oral, pulmonary, subcutaneous, etc.

Therapeutic efficacy

It is the capacity of a drug or other interventions to produce a therapeutic effect in the body.

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Ameena Shirin, V.K., Sankar, R., Kotta, S., Pramod, K. (2020). In Vivo Assessment of the Efficiency of Systemic Delivery. In: Lai, WF. (eds) Systemic Delivery Technologies in Anti-Aging Medicine: Methods and Applications. Healthy Ageing and Longevity, vol 13. Springer, Cham. https://doi.org/10.1007/978-3-030-54490-4_4

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