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Critical Reviews™ in Therapeutic Drug Carrier Systems

Erscheint 6 Ausgaben pro Jahr

ISSN Druckformat: 0743-4863

ISSN Online: 2162-660X

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 3.6 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.8 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00023 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.39 SJR: 0.42 SNIP: 0.89 CiteScore™:: 5.5 H-Index: 79

Indexed in

Use of Vitamin B12 Conjugates to Deliver Protein Drugs by the Oral Route

Volumen 15, Ausgabe 6, 1998, 30 pages
DOI: 10.1615/CritRevTherDrugCarrierSyst.v15.i6.10
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ABSTRAKT

The treatment of patients with most peptide and protein pharmaceuticals must currently be performed by injection, with the accompanying disadvantages of patient discomfort, increased medical costs, and reduced patient compliance. It would be much easier and more acceptable if these drugs could be given by the oral route. Unfortunately, this route cannot be used with most proteins and with peptides due to both the degradation of these molecules within the intestine and their poor uptake across the intestinal wall. In this review, an uptake system is described that potentially overcomes both these problems. This system relies upon the natural uptake mechanism for vitamin B12 to cotransport peptides and proteins linked to the vitamin B12 from the intestine to the circulation. In an exciting extension to this technology, it has been found that it is also possible to transport nanoparticles, linked to the vitamin B12, into the circulation. Such nanoparticles can potentially be loaded with peptides or proteins of choice, and so protect these molecules from degradation in the intestine, while simultaneously transporting them into the circulation. These findings are an important step in realizing the possibility of delivering almost all peptides and proteins via the oral route.

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