Amelioration of dementia induced by Aβ 22-35 through rectal delivery of undecapeptide-hEGF to mouse brain
Distribution of P11-hEGF and hEGF after IV injection or per rectum in mice ( n = 6). P11-hEGF or hEGF (normalized to 40 μg hEGF) were IV injected to the mice. The animals were killed at various time intervals after injection, and the organs (brain, heart, liver, spleen, lung, kidney and stomach) wer...
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Published in | International journal of pharmaceutics Vol. 405; no. 1; pp. 1 - 8 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
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Elsevier B.V
28.02.2011
Elsevier |
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Abstract | Distribution of P11-hEGF and hEGF after IV injection or per rectum in mice (
n
=
6). P11-hEGF or hEGF (normalized to 40
μg hEGF) were IV injected to the mice. The animals were killed at various time intervals after injection, and the organs (brain, heart, liver, spleen, lung, kidney and stomach) were immediately removed. Tissue homogenates (1:10, w/v) were prepared and stored at −20
°C. The contents of EGF in various tissue homogenates were quantitatively determined by the radio-immunological method. (A and C) P 11-hEGF; (B and D) hEGF (Sigma).
A group of growth factors have been shown to play important roles in amelioration of the malfunction of the neurodegenerative diseases. However, the proteins or polypeptides passing across the blood-brain barrier (BBB) to access the brain parenchyma are relatively few so that it hinders the therapies in clinic. Here a genetically reconstructed fusion peptide of human epidermal growth factor (hEGF) with an undecapeptide YGRKKRRQRRR (P11) was used to investigate the permeability between the cell membrane and the BBB via rectal administration. The efficiency to rescue the Aβ 22-35-induced dementia in mice was assessed after administration of P11-hEGF per rectal. Our results showed that P11-hEGF permeates across not only the 3T3 cell membrane
in vitro, but also the endothelia of vessels after intravenous injection (IV), and the mucosa of the rectum after per rectal administration. Further results showed that the circulating P11-hEGF allowed penetrating through the blood-brain barrier and then getting into the brain manifesting biological responses. In the animal experiments, treatment with P11-hEGF not only ameliorated the dementia induced by Aβ 22-35 but also rescued the dementia of the aged mice, no matter how it was administrated (IV or per rectal). These results suggest that the rectal non-invasive delivery of the P11 polypeptide-conjugated growth factor is an efficient way for BBB transduction, thus raises the hope of real therapeutic progress against neurodegenerative diseases. |
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AbstractList | A group of growth factors have been shown to play important roles in amelioration of the malfunction of the neurodegenerative diseases. However, the proteins or polypeptides passing across the blood-brain barrier (BBB) to access the brain parenchyma are relatively few so that it hinders the therapies in clinic. Here a genetically reconstructed fusion peptide of human epidermal growth factor (hEGF) with an undecapeptide YGRKKRRQRRR (P11) was used to investigate the permeability between the cell membrane and the BBB via rectal administration. The efficiency to rescue the Aβ 22-35-induced dementia in mice was assessed after administration of P11-hEGF per rectal. Our results showed that P11-hEGF permeates across not only the 3T3 cell membrane in vitro, but also the endothelia of vessels after intravenous injection (IV), and the mucosa of the rectum after per rectal administration. Further results showed that the circulating P11-hEGF allowed penetrating through the blood-brain barrier and then getting into the brain manifesting biological responses. In the animal experiments, treatment with P11-hEGF not only ameliorated the dementia induced by Aβ 22-35 but also rescued the dementia of the aged mice, no matter how it was administrated (IV or per rectal). These results suggest that the rectal non-invasive delivery of the P11 polypeptide-conjugated growth factor is an efficient way for BBB transduction, thus raises the hope of real therapeutic progress against neurodegenerative diseases. Distribution of P11-hEGF and hEGF after IV injection or per rectum in mice ( n = 6). P11-hEGF or hEGF (normalized to 40 μg hEGF) were IV injected to the mice. The animals were killed at various time intervals after injection, and the organs (brain, heart, liver, spleen, lung, kidney and stomach) were immediately removed. Tissue homogenates (1:10, w/v) were prepared and stored at −20 °C. The contents of EGF in various tissue homogenates were quantitatively determined by the radio-immunological method. (A and C) P 11-hEGF; (B and D) hEGF (Sigma). A group of growth factors have been shown to play important roles in amelioration of the malfunction of the neurodegenerative diseases. However, the proteins or polypeptides passing across the blood-brain barrier (BBB) to access the brain parenchyma are relatively few so that it hinders the therapies in clinic. Here a genetically reconstructed fusion peptide of human epidermal growth factor (hEGF) with an undecapeptide YGRKKRRQRRR (P11) was used to investigate the permeability between the cell membrane and the BBB via rectal administration. The efficiency to rescue the Aβ 22-35-induced dementia in mice was assessed after administration of P11-hEGF per rectal. Our results showed that P11-hEGF permeates across not only the 3T3 cell membrane in vitro, but also the endothelia of vessels after intravenous injection (IV), and the mucosa of the rectum after per rectal administration. Further results showed that the circulating P11-hEGF allowed penetrating through the blood-brain barrier and then getting into the brain manifesting biological responses. In the animal experiments, treatment with P11-hEGF not only ameliorated the dementia induced by Aβ 22-35 but also rescued the dementia of the aged mice, no matter how it was administrated (IV or per rectal). These results suggest that the rectal non-invasive delivery of the P11 polypeptide-conjugated growth factor is an efficient way for BBB transduction, thus raises the hope of real therapeutic progress against neurodegenerative diseases. |
Author | Zhao, Bao-Quan Zang, Ting Li, Qian Guo, Yan-Ru Li, Xu-Ling Zhou, Jian-Ping Sun, Man-Ji Qu, Heng-Yan |
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Keywords | PTD BBB DAB Amp Aβ 22-35 peptide Aβ 22-35 OmpA hEGF IV P11-hEGF GFAP AUC DMEM P11 SDS-PAGE Blood-brain barrier FBS IPTG Rectal delivery BrdU ELISA Dementia Performance evaluation Pharmaceutical technology Rodentia Route of administration Blood brain barrier Rectal administration Encephalon Vertebrata Mammalia Mouse Animal Rectum Degenerative disease Technique Pharmacokinetics |
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Snippet | Distribution of P11-hEGF and hEGF after IV injection or per rectum in mice (
n
=
6). P11-hEGF or hEGF (normalized to 40
μg hEGF) were IV injected to the mice.... A group of growth factors have been shown to play important roles in amelioration of the malfunction of the neurodegenerative diseases. However, the proteins... |
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SubjectTerms | Administration, Rectal Amyloid beta-Peptides - metabolism animal experimentation Animals Aβ 22-35 peptide Biological and medical sciences Blood-brain barrier Blood-Brain Barrier - metabolism brain Brain - metabolism Cell Membrane Permeability - drug effects Cell Proliferation - drug effects Dementia Dementia - drug therapy Dementia - metabolism epidermal growth factor Epidermal Growth Factor - administration & dosage Epidermal Growth Factor - genetics Epidermal Growth Factor - pharmacokinetics Epidermal Growth Factor - pharmacology General pharmacology Humans intravenous injection Learning Disorders - drug therapy Medical sciences Memory Disorders - drug therapy Mice mucosa neurodegenerative diseases Oligopeptides - administration & dosage Oligopeptides - pharmacokinetics Oligopeptides - pharmacology P11-hEGF permeability permeates Pharmaceutical technology. Pharmaceutical industry Pharmacology. Drug treatments polypeptides proteins Recombinant Fusion Proteins - administration & dosage Recombinant Fusion Proteins - blood Recombinant Fusion Proteins - pharmacokinetics Recombinant Fusion Proteins - pharmacology Rectal delivery rectum |
Title | Amelioration of dementia induced by Aβ 22-35 through rectal delivery of undecapeptide-hEGF to mouse brain |
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