Nose-to-Brain Delivery

The global prevalence of neurologic disorders is rising, and yet we are still unable to deliver most drug molecules, in therapeutic quantities, to the brain. The blood brain barrier consists of a tight layer of endothelial cells surrounded by astrocyte foot processes, and these anatomic features con...

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Veröffentlicht in:The Journal of pharmacology and experimental therapeutics Jg. 370; H. 3; S. 593
Hauptverfasser: Wang, Zian, Xiong, Guojun, Tsang, Wai Chun, Schätzlein, Andreas G, Uchegbu, Ijeoma F
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States 01.09.2019
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ISSN:1521-0103, 1521-0103
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Abstract The global prevalence of neurologic disorders is rising, and yet we are still unable to deliver most drug molecules, in therapeutic quantities, to the brain. The blood brain barrier consists of a tight layer of endothelial cells surrounded by astrocyte foot processes, and these anatomic features constitute a significant barrier to drug transport from the blood to the brain. One way to bypass the blood brain barrier and thus treat diseases of the brain is to use the nasal route of administration and deposit drugs at the olfactory region of the nares, from where they travel to the brain via mechanisms that are still not clearly understood, with travel across nerve fibers and travel via a perivascular pathway both being hypothesized. The nose-to-brain route has been demonstrated repeatedly in preclinical models, with both solution and particulate formulations. The nose-to-brain route has also been demonstrated in human studies with solution and particle formulations. The entry of device manufacturers into the arena will enable the benefits of this delivery route to become translated into approved products. The key factors that determine the efficacy of delivery via this route include the following: delivery to the olfactory area of the nares as opposed to the respiratory region, a longer retention time at the nasal mucosal surface, penetration enhancement of the active through the nasal epithelia, and a reduction in drug metabolism in the nasal cavity. Indications where nose-to-brain products are likely to emerge first include the following: neurodegeneration, post-traumatic stress disorder, pain, and glioblastoma.
AbstractList The global prevalence of neurologic disorders is rising, and yet we are still unable to deliver most drug molecules, in therapeutic quantities, to the brain. The blood brain barrier consists of a tight layer of endothelial cells surrounded by astrocyte foot processes, and these anatomic features constitute a significant barrier to drug transport from the blood to the brain. One way to bypass the blood brain barrier and thus treat diseases of the brain is to use the nasal route of administration and deposit drugs at the olfactory region of the nares, from where they travel to the brain via mechanisms that are still not clearly understood, with travel across nerve fibers and travel via a perivascular pathway both being hypothesized. The nose-to-brain route has been demonstrated repeatedly in preclinical models, with both solution and particulate formulations. The nose-to-brain route has also been demonstrated in human studies with solution and particle formulations. The entry of device manufacturers into the arena will enable the benefits of this delivery route to become translated into approved products. The key factors that determine the efficacy of delivery via this route include the following: delivery to the olfactory area of the nares as opposed to the respiratory region, a longer retention time at the nasal mucosal surface, penetration enhancement of the active through the nasal epithelia, and a reduction in drug metabolism in the nasal cavity. Indications where nose-to-brain products are likely to emerge first include the following: neurodegeneration, post-traumatic stress disorder, pain, and glioblastoma.The global prevalence of neurologic disorders is rising, and yet we are still unable to deliver most drug molecules, in therapeutic quantities, to the brain. The blood brain barrier consists of a tight layer of endothelial cells surrounded by astrocyte foot processes, and these anatomic features constitute a significant barrier to drug transport from the blood to the brain. One way to bypass the blood brain barrier and thus treat diseases of the brain is to use the nasal route of administration and deposit drugs at the olfactory region of the nares, from where they travel to the brain via mechanisms that are still not clearly understood, with travel across nerve fibers and travel via a perivascular pathway both being hypothesized. The nose-to-brain route has been demonstrated repeatedly in preclinical models, with both solution and particulate formulations. The nose-to-brain route has also been demonstrated in human studies with solution and particle formulations. The entry of device manufacturers into the arena will enable the benefits of this delivery route to become translated into approved products. The key factors that determine the efficacy of delivery via this route include the following: delivery to the olfactory area of the nares as opposed to the respiratory region, a longer retention time at the nasal mucosal surface, penetration enhancement of the active through the nasal epithelia, and a reduction in drug metabolism in the nasal cavity. Indications where nose-to-brain products are likely to emerge first include the following: neurodegeneration, post-traumatic stress disorder, pain, and glioblastoma.
The global prevalence of neurologic disorders is rising, and yet we are still unable to deliver most drug molecules, in therapeutic quantities, to the brain. The blood brain barrier consists of a tight layer of endothelial cells surrounded by astrocyte foot processes, and these anatomic features constitute a significant barrier to drug transport from the blood to the brain. One way to bypass the blood brain barrier and thus treat diseases of the brain is to use the nasal route of administration and deposit drugs at the olfactory region of the nares, from where they travel to the brain via mechanisms that are still not clearly understood, with travel across nerve fibers and travel via a perivascular pathway both being hypothesized. The nose-to-brain route has been demonstrated repeatedly in preclinical models, with both solution and particulate formulations. The nose-to-brain route has also been demonstrated in human studies with solution and particle formulations. The entry of device manufacturers into the arena will enable the benefits of this delivery route to become translated into approved products. The key factors that determine the efficacy of delivery via this route include the following: delivery to the olfactory area of the nares as opposed to the respiratory region, a longer retention time at the nasal mucosal surface, penetration enhancement of the active through the nasal epithelia, and a reduction in drug metabolism in the nasal cavity. Indications where nose-to-brain products are likely to emerge first include the following: neurodegeneration, post-traumatic stress disorder, pain, and glioblastoma.
Author Tsang, Wai Chun
Schätzlein, Andreas G
Xiong, Guojun
Wang, Zian
Uchegbu, Ijeoma F
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  givenname: Zian
  surname: Wang
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  organization: UCL School of Pharmacy, London, United Kingdom (Z.-a.W., G.X., W.C.T., A.G.S., I.F.U.); and Nanomerics, London, United Kingdom (A.G.S., I.F.U.)
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  fullname: Xiong, Guojun
  organization: UCL School of Pharmacy, London, United Kingdom (Z.-a.W., G.X., W.C.T., A.G.S., I.F.U.); and Nanomerics, London, United Kingdom (A.G.S., I.F.U.)
– sequence: 3
  givenname: Wai Chun
  surname: Tsang
  fullname: Tsang, Wai Chun
  organization: UCL School of Pharmacy, London, United Kingdom (Z.-a.W., G.X., W.C.T., A.G.S., I.F.U.); and Nanomerics, London, United Kingdom (A.G.S., I.F.U.)
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  givenname: Andreas G
  surname: Schätzlein
  fullname: Schätzlein, Andreas G
  organization: UCL School of Pharmacy, London, United Kingdom (Z.-a.W., G.X., W.C.T., A.G.S., I.F.U.); and Nanomerics, London, United Kingdom (A.G.S., I.F.U.)
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  givenname: Ijeoma F
  surname: Uchegbu
  fullname: Uchegbu, Ijeoma F
  email: Ijeoma.uchegbu@ucl.ac.uk
  organization: UCL School of Pharmacy, London, United Kingdom (Z.-a.W., G.X., W.C.T., A.G.S., I.F.U.); and Nanomerics, London, United Kingdom (A.G.S., I.F.U.) Ijeoma.uchegbu@ucl.ac.uk
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SubjectTerms Administration, Intranasal - methods
Animals
Brain - metabolism
Drug Delivery Systems - methods
Humans
Nasal Cavity - metabolism
Nasal Mucosa - metabolism
Nose
Title Nose-to-Brain Delivery
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