24小时热门版块排行榜    

Znn3bq.jpeg
查看: 3631  |  回复: 8

sonny

金虫 (著名写手)

[求助] 新药研发中评估小分子化合物极性的Log P疏水常数的意义是什么?

最近我们合成出来一中化合物B,疏水常数Log P=3.21, 其母体化合物A的Log P=-1.51。但是,相对于母体化合物A,我们的化合物B表现出更加强烈的诱导细胞凋亡的能力。我想知道这两个数值在评估我的新化合物的价值方面,代表什么意义?如果说数值越大,代表疏水性越强,我想了解一下一般新药开发过程中这个数值允许的的尺度有多大呢?或者亲爱的虫友们给我提供一些资料,我自己学习一下!先谢谢大家了!
    最近在投文章,毕业,修改意见里要我解释的问题设计到这些内容,我不是学化学的,所以不是很懂,着急啊,希望大家帮帮忙!感激不尽!
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
回帖置顶 ( 共有2个 )

catwithdog

新虫 (初入文坛)


【答案】应助回帖

★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
marktiger: 金币+2, 欢迎参与,欢迎常来。 2012-11-28 08:34:52
sonny: 金币+5, ★★★★★最佳答案 2012-11-28 11:20:53
sonny: 回帖置顶 2012-11-28 11:21:08
For your reference:

1.        我想了解一下一般新药开发过程中这个数值允许的的尺度有多大呢?
Based on Lipinski's Rule of Five,  log P in −0.4 to +5.6 range will be ideal drug. So your compounds are good.
2.        我想知道这两个数值在评估我的新化合物的价值方面,
First, you need understand what is Log P. LogP , partition (P) coefficient , is the ratio of concentrations of a compound in a mixture of two immiscible phases at equilibrium. These coefficients are a measure of the difference in solubility of the compound in these two phases. Normally one of the solvents chosen is water while the second is hydrophobic such as octanol. Hence both the partition and distribution coefficient are measures of how hydrophilic ("water-loving" or hydrophobic ("water-fearing" a chemical substance is.
Log P = log (compound in Octanol/ compound in water)

So, 母体化合物A的Log P=-1.51,  is less  hydrophobic than 化合物B, Log P=3.21. In another word, 化合物B疏水性强.

3.        代表什么意义?
In medical practice, partition coefficients are useful for example in estimating distribution of drugs within the body. Hydrophobic drugs with high octanol/water partition coefficients are preferentially distributed to hydrophobic compartments such as lipid bilayers of cells while hydrophilic drugs (low octanol/water partition coefficients) preferentially are found in hydrophilic compartments such as blood serum.
So 化合物B may have more distribution in lipid bilayers of cells which may be your target place. (that's only we guess)
4楼2012-11-28 03:28:20
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

cpujacs

荣誉版主 (知名作家)

优秀版主优秀版主优秀版主



marktiger: 金币+1, 欢迎参与,欢迎常来。 2012-11-28 08:35:10
sonny: 回帖置顶 2012-11-28 11:21:00
引用回帖:
4楼: Originally posted by catwithdog at 2012-11-28 03:28:20
For your reference:

1.        我想了解一下一般新药开发过程中这个数值允许的的尺度有多大呢?
Based on Lipinski's Rule of Five,  log P in −0.4 to +5.6 range will be ideal drug. So your compounds are  ...

The logP value of a compound, which is the logarithm of its partition coefficient between n-octanol and water log(coctanol/cwater), is a well established measure of the compound's hydrophilicity. Low hydrophilicities and therefore high logP values cause poor absorption or permeation. It has been shown for compounds to have a reasonable propability of being well absorbt their logP value must not be greater than 5.0. The distribution of calculated logP values of more than 3000 drugs on the market underlines this fact (see diagram)

cLogPDis.gif

5楼2012-11-28 08:27:09
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通回帖

heyongyao

金虫 (正式写手)

【答案】应助回帖

★ ★ ★
感谢参与,应助指数 +1
marktiger: 金币+1, 欢迎参与,欢迎常来。 2012-11-28 08:34:25
sonny: 金币+2 2012-11-28 11:18:44
不做有机合成,真不好解释给你。就是判断分子的脂溶性和水溶性,初步判断化合物的溶解性-生物利用度
2楼2012-11-28 00:23:04
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

heyongyao

金虫 (正式写手)

【答案】应助回帖

★ ★ ★
marktiger: 金币+1, 欢迎参与,欢迎常来。 2012-11-28 08:34:31
sonny: 金币+2 2012-11-28 11:18:50
就是透过细胞膜的特性,很显然B的细胞透过能力强于A
3楼2012-11-28 00:24:24
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

yiwenbin

禁虫 (正式写手)


marktiger: 金币+1, 欢迎参与,欢迎常来。下次可以选择应助回帖哈。 2012-11-29 08:15:06
本帖内容被屏蔽

6楼2012-11-28 08:45:16
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

yylex

捐助贵宾 (正式写手)

【答案】应助回帖


感谢参与,应助指数 +1
sonny: 金币+1 2012-11-28 11:22:36
就是透过细胞膜的特性,很显然B的细胞透过能力强于A
7楼2012-11-28 09:10:21
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

sonny

金虫 (著名写手)

引用回帖:
4楼: Originally posted by catwithdog at 2012-11-28 03:28:20
For your reference:

1.        我想了解一下一般新药开发过程中这个数值允许的的尺度有多大呢?
Based on Lipinski's Rule of Five,  log P in −0.4 to +5.6 range will be ideal drug. So your compounds are  ...

那我是否可以理解我化合物B更容易进入细胞来发挥药效呢?
这位仁兄的解释很全面,能够给我提供一些相关的文献呢?我想好好看一下,或者引用一下再文章中?谢谢了!
8楼2012-11-28 11:34:29
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

catwithdog

新虫 (初入文坛)


那我是否可以理解我化合物B更容易进入细胞来发挥药效呢?
Theoretically you can explain it in this way for your paper.

这位仁兄的解释很全面,能够给我提供一些相关的文献呢?我想好好看一下,或者引用一下再文章中?谢谢了!
Sorry, I don’t have this reference on hand now.
9楼2012-11-29 04:55:00
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 sonny 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[基金申请] 有爆料,一个青年教师卖房得400万,然后换了一个四青帽子 +9 babu2015 2026-04-08 9/450 2026-04-10 11:43 by 苏东坡二世
[考研] 调剂 +24 不逢春 2026-04-07 25/1250 2026-04-10 09:39 by 690616278
[考研] 求调剂 +15 张zic 2026-04-05 16/800 2026-04-10 08:12 by kangsm
[考研] 材料化工总分334求调剂 +16 Riot2025 2026-04-08 17/850 2026-04-09 20:19 by maddjdld
[考研] 材料与化工专硕306分找合适调剂 +27 沧海轻舟e 2026-04-06 28/1400 2026-04-08 22:06 by wdyheheeh
[考研] 计算机408|在校多次国家级竞赛获奖|申请调剂 +4 东山大白鹅 2026-04-05 4/200 2026-04-08 00:18 by chongya
[考研] 313求调剂 +3 十六拾陆 2026-04-07 3/150 2026-04-07 23:20 by lbsjt
[考研] 306求调剂 +3 15287505595 2026-04-03 3/150 2026-04-07 18:08 by 蓝云思雨
[考研] 一志愿西电085401求调剂 +4 sunw1306 2026-04-07 4/200 2026-04-07 16:40 by 啵啵啵0119
[考研] 生物调剂 +5 橙子橙子橙子啊 2026-04-05 9/450 2026-04-07 15:31 by 上岸快快
[考研] 求调剂 +4 电气小神童 2026-04-04 6/300 2026-04-07 00:14 by guanxin1001
[考研] 287分求调剂 有专利国奖一志愿哈工大085406 +6 白易辰 2026-04-06 7/350 2026-04-06 22:46 by 875465
[考研] 307求调剂 +3 所念及所望 2026-04-06 3/150 2026-04-06 17:30 by 土木硕士招生
[考研] 求调剂 +4 wos666 2026-04-03 5/250 2026-04-06 15:22 by wos666
[考研] 295求调剂 +8 FZAC123 2026-04-03 8/400 2026-04-05 17:46 by 蓝云思雨
[考研] 一志愿上海海洋大学083200食品学硕,求调剂,接受其他专业083200 +4 what张 2026-04-04 5/250 2026-04-05 14:07 by chw1980_0
[考研] 320求调剂 +3 一样圆 2026-04-04 3/150 2026-04-04 22:29 by 啵啵啵0119
[考研] 278求调剂 +14 范婷娜 2026-04-04 15/750 2026-04-04 22:15 by lqwchd
[考研] 309求调剂 +4 快乐的小白鸽 2026-04-04 5/250 2026-04-04 15:55 by cql1109
[考研] 26调剂 086003 +6 失活的细胞 2026-04-04 6/300 2026-04-04 09:50 by zhangdingwa
信息提示
请填处理意见