申请人:The University of Tokyo
公开号:US20190256544A1
公开(公告)日:2019-08-22
It is an object of the present invention to provide a fluorescence imaging probe capable of selectively visualizing target cells such as cells expressing β-galactosidase (lacZ expressing cells) at a single-cell level in a red fluorescence region, and of performing co-staining together with GFP.
An intracellularly-retainable red fluorescent probe comprising a compound represented by the following formula (I) or a salt thereof:
wherein: A represents a monovalent group cleaved by an enzyme; R
1
represents
a hydrogen atom, or one to four of the same or different substituents bonded to a benzene ring; R
3
, R
4
, R
5
, and R
6
each independently represent —CFR
10
R
11
, —CF
2
R
12
, a hydrogen atom, a hydroxyl group, an alkyl group, or a halogen atom, wherein at least one of R
3
, R
4
, R
5
, and R
6
is —CFR
10
R
11
or —CF
2
R
12
;
R
2
and R
7
each independently represent a hydrogen atom, a hydroxyl group, an alkyl group, or a halogen atom; R
8
and R
9
each independently represent a hydrogen atom or an alkyl group; R
10
, R
11
, and R
12
each independently represent a hydrogen atom, an alkyl group, or an alkenyl group; X represents Si(R
a
) (R
b
), wherein R
a
and R
b
each independently represent a hydrogen atom or an alkyl group; and Y is —C(═O)— or —R
c
C(═O)—, wherein R
c
is an alkylene group having 1-3 carbon atoms.
本发明的目的是提供一种荧光成像探针,能够在红光荧光区域单细胞水平上选择性地可视化目标细胞,例如表达β-半乳糖苷酶(lacZ表达细胞)的细胞,并能够与GFP一起进行共染色。一种可在细胞内保留的红色荧光探针,包括下式(I)所代表的化合物或其盐:其中:A代表一种可被酶切割的一价基团;R1代表氢原子,或者与苯环结合的一个到四个相同或不同的取代基;R3、R4、R5和R6分别独立地代表—CFR10R11,—CF2R12,氢原子,羟基,烷基或卤素原子,其中R3、R4、R5和R6中至少有一个是—CFR10R11或—CF2R12;R2和R7分别独立地代表氢原子,羟基,烷基或卤素原子;R8和R9分别独立地代表氢原子或烷基;R10、R11和R12分别独立地代表氢原子,烷基或烯基;X代表Si(Ra)(Rb),其中Ra和Rb分别独立地代表氢原子或烷基;Y为—C(═O)—或—RcC(═O)—,其中Rc为具有1-3个碳原子的烷基基团。