7 research outputs found
Additional file 2: of Auditing sex- and gender-based medicine (SGBM) content in medical school curriculum: a student scholar model
Comparative Analysis of MS-2 Student Scholar Audit of SGBM Content in Texas Tech Medical School Curriculum to Key SGBM Topics Outlined in the Principles of Gender Specific Medicine, 2nd Ed. (PDF 137 kb
Intracellular Trafficking Pathways for Nuclear Delivery of Plasmid DNA Complexed with Highly Efficient Endosome Escape Polymers
Understanding
the pathways for nuclear entry could see vast improvements
in polymer design for the delivery of genetic materials to cells.
Here, we use a novel diblock copolymer complexed with plasmid DNA
(pDNA) to determine both its cellular entry and nuclear pathways.
The diblock copolymer (A-C3) is specifically designed to bind and
protect pDNA, release it at a specific time, but more importantly,
rapidly escape the endosome. The copolymer was taken up by HEK293
cells preferentially via the clathrin-mediated endocytosis (CME) pathway,
and the pDNA entered the nucleus to produce high gene expression levels
in all cells after 48 h, a similar observation to the commercially
available polymer transfection agent, PEI Max. This demonstrates that
the polymers must first escape the endosome and then mediate transport
of pDNA to the nucleus for occurrence of gene expression. The amount
of pDNA within the nucleus was found to be higher for our A-C3 polymer
than PEI Max, with our polymer delivering 7 times more pDNA than PEI
Max after 24 h. We further found that entry into the nucleus was primarily
through the small nuclear pores and did not occur during mitosis when
the nuclear envelope becomes compromised. The observation that the
polymers are also found in the nucleus supports the hypothesis that
the large pDNA/polymer complex (size ∼200 nm) must dissociate
prior to nucleus entry and that cationic and hydrophobic monomer units
on the polymer may facilitate active transport of the pDNA through
the nuclear pore
Additional file 2: of Clinical efficacy and IL-17 targeting mechanism of Indigo naturalis as a topical agent in moderate psoriasis
Enrichment of ingenuity pathways by gene signature from a predominately White psoriasis population [27]. (DOCX 18 kb
Additional file 3: of Clinical efficacy and IL-17 targeting mechanism of Indigo naturalis as a topical agent in moderate psoriasis
Enrichment of ingenuity pathways by gene signature of Indigo naturalis treatment of moderate psoriasis from our study population. (DOCX 23 kb
Additional file 1: of Clinical efficacy and IL-17 targeting mechanism of Indigo naturalis as a topical agent in moderate psoriasis
Enrichment of ingenuity pathways by moderate psoriasis gene signature from our study population. (DOCX 22 kb
Discovery of Imigliptin, a Novel Selective DPP‑4 Inhibitor for the Treatment of Type 2 Diabetes
We
report our discovery of a novel series of potent and selective
dipeptidyl peptidase IV (DPP-4) inhibitors. Starting from a lead identified
by scaffold-hopping approach, our discovery and development efforts
were focused on exploring structure–activity relationships,
optimizing pharmacokinetic profile, improving <i>in vitro</i> and <i>in vivo</i> efficacy, and evaluating safety profile.
The selected candidate, Imigliptin, is now undergoing clinical trial
Multivalent Antiviral XTEN–Peptide Conjugates with Long in Vivo Half-Life and Enhanced Solubility
XTENs are unstructured, nonrepetitive
protein polymers designed
to prolong the in vivo half-life of pharmaceuticals by introducing
a bulking effect similar to that of polyÂ(ethylene glycol). While XTEN
can be expressed as a recombinant fusion protein with bioactive proteins
and peptides, therapeutic molecules of interest can also be chemically
conjugated to XTEN. Such an approach permits precise control over
the positioning, spacing, and valency of bioactive moieties along
the length of XTEN. We have demonstrated the attachment of T-20, an
anti-retroviral peptide indicated for the treatment of HIV-1 patients
with multidrug resistance, to XTEN. By reacting maleimide-functionalized
T-20 with cysteine-containing XTENs and varying the number and positioning
of cysteines in the XTENs, a library of different peptide–polymer
combinations were produced. The T-20-XTEN conjugates were tested using
an in vitro antiviral assay and were found to be effective in inhibiting
HIV-1 entry and preventing cell death, with the copy number and spacing
of the T-20 peptides influencing antiviral activity. The peptide–XTEN
conjugates were also discovered to have enhanced solubilities in comparison
with the native T-20 peptide. The pharmacokinetic profile of the most
active T-20-XTEN conjugate was measured in rats, and it was found
to exhibit an elimination half-life of 55.7 ± 17.7 h, almost
20 times longer than the reported half-life for T-20 dosed in rats.
As the conjugation of T-20 to XTEN greatly improved the in vivo half-life
and solubility of the peptide, the XTEN platform has been demonstrated
to be a versatile tool for improving the properties of drugs and enabling
the development of a class of next-generation therapeutics