However, analytical studies by the Wender
group of the potential binding site of the phorbol esters on
PKC as a guide to the design of a simpler analogue of these
agents246 were expanded to bryostatin 1247 and led to the
production of simpler bryostatin analogues known colloquially
as “bryologs” that maintained the putative binding sites
at the oxygen atoms at C1 (ketone), C19 (hydroxyl), and C26
(hydroxyl). These molecules (81, 82; Scheme 17) demonstrated
nanomolar binding constants when measured in
displacement assays of tritiated phorbol esters, with the
figures being in the same general range as those for bryostatin
1, and had activities in in vitro cell line assays close to those
demonstrated by bryostatin 1 itself.248-251 Introduction of a
second lactone gave a compound (83; Scheme 17) with 8
nM binding affinity and an ED50 of 113 nM against the
murine leukemia P388 cell line,252 and use of different fatty
acid esters gave compounds exhibiting binding affinities for
PKC isozymes in the 7-232 nM range depending upon the
fatty acid used. A further simple modification involving
removal of a methyl group in the C26 side chain gave a
compound (84; Scheme 17) that had a binding affinity to
PKC at the picomolar level254 and demonstrated greater
potency than bryostatin 1 in in vitro cell line assays.
Improved syntheses of the bryologs might well permit further
exploration of these analogues
However, analytical studies by the Wender
group of the potential binding site of the phorbol esters on
PKC as a guide to the design of a simpler analogue of these
agents246 were expanded to bryostatin 1247 and led to the
production of simpler bryostatin analogues known colloquially
as “bryologs” that maintained the putative binding sites
at the oxygen atoms at C1 (ketone), C19 (hydroxyl), and C26
(hydroxyl). These molecules (81, 82; Scheme 17) demonstrated
nanomolar binding constants when measured in
displacement assays of tritiated phorbol esters, with the
figures being in the same general range as those for bryostatin
1, and had activities in in vitro cell line assays close to those
demonstrated by bryostatin 1 itself.248-251 Introduction of a
second lactone gave a compound (83; Scheme 17) with 8
nM binding affinity and an ED50 of 113 nM against the
murine leukemia P388 cell line,252 and use of different fatty
acid esters gave compounds exhibiting binding affinities for
PKC isozymes in the 7-232 nM range depending upon the
fatty acid used. A further simple modification involving
removal of a methyl group in the C26 side chain gave a
compound (84; Scheme 17) that had a binding affinity to
PKC at the picomolar level254 and demonstrated greater
potency than bryostatin 1 in in vitro cell line assays.
Improved syntheses of the bryologs might well permit further
exploration of these analogues
การแปล กรุณารอสักครู่..

However, analytical studies by the Wender
group of the potential binding site of the phorbol esters on
PKC as a guide to the design of a simpler analogue of these
agents246 were expanded to bryostatin 1247 and led to the
production of simpler bryostatin analogues known colloquially
as “bryologs” that maintained the putative binding sites
at the oxygen atoms at C1 (ketone), C19 (hydroxyl), and C26
(hydroxyl). These molecules (81, 82; Scheme 17) demonstrated
nanomolar binding constants when measured in
displacement assays of tritiated phorbol esters, with the
figures being in the same general range as those for bryostatin
1, and had activities in in vitro cell line assays close to those
demonstrated by bryostatin 1 itself.248-251 Introduction of a
second lactone gave a compound (83; Scheme 17) with 8
nM binding affinity and an ED50 of 113 nM against the
murine leukemia P388 cell line,252 and use of different fatty
acid esters gave compounds exhibiting binding affinities for
PKC isozymes in the 7-232 nM range depending upon the
fatty acid used. A further simple modification involving
removal of a methyl group in the C26 side chain gave a
สารประกอบ ( 84 ; โครงการ 17 ) ซึ่งมีความใกล้ชิดผูกพันกับ
เนสซีที่ level254 picomolar และแสดงให้เห็นถึงศักยภาพที่ยิ่งใหญ่
กว่า bryostatin 1 ในการเพาะเลี้ยงเนื้อเยื่อเซลล์ไลน์ ) .
การปรับปรุงการสังเคราะห์ของ bryologs อาจอนุญาตให้มีการสำรวจเพิ่มเติม
ของผลเหล่านี้
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