摘要:
There is provided a conjugate of a delivery agent containing a chemical moiety and at least one flavonoid. The flavonoid exists in a monomeric form or dimeric form before conjugation and remains in the monomeric form or dimeric form after conjugation. Preferably, the conjugate comprises two flavonoids. The delivery agent is conjugated at the C6 and/or the C8 position of the A ring of the flavonoid. An anti-cancer agent delivery vehicle comprising an anti-cancer agent and the conjugate is also provided.
摘要:
There is provided a conjugate of a delivery agent containing a chemical moiety and at least one flavonoid. The flavonoid exists in a monomeric form or dimeric form before conjugation and remains in the monomeric form or dimeric form after conjugation. Preferably, the conjugate comprises two flavonoids. The delivery agent is conjugated at the C6 and/or the C8 position of the A ring of the flavonoid. An anti-cancer agent delivery vehicle comprising an anti-cancer agent and the conjugate is also provided.
摘要:
There is provided a delivery vehicle comprising an anti-cancer agent together with a conjugate of a delivery agent containing a free aldehyde and a flavonoid, having the delivery agent conjugated at the C6 and/or the C8 position of the A ring of the flavonoid. The resulting delivery vehicles may be used to deliver an anti-cancer agent to a cell.
摘要:
There is provided a delivery vehicle comprising an anti-cancer agent together with a conjugate of a delivery agent containing a free aldehyde and a flavonoid, having the delivery agent conjugated at the C6 and/or the C8 position of the A ring of the flavonoid. The resulting delivery vehicles may be used to deliver an anti-cancer agent to a cell.
摘要:
The present invention describes a curable bone cement. The cement comprises a curable polymeric binder and a filler, and is capable of curing without substantial evolution of heat on exposure to a curing agent. The binder comprises phenol groups which are capable of reacting in order to cure the cement.
摘要:
The present invention describes a curable bone cement. The cement comprises a curable polymeric binder and a filler, and is capable of curing without substantial evolution of heat on exposure to a curing agent. The binder comprises phenol groups which are capable of reacting in order to cure the cement.
摘要:
A polymer fiber is formed by hydrodynamic spinning. Fluids are forced to flow through a conduit to form a laminar flow comprising three or more layers of generally coaxial fluid flows, at respective flow rates selected to define a cross-section of a tubular middle layer of the fluid flows. The middle layer comprises a cross-linkable polymer precursor. Another layer of the fluid flows comprise a cross-linking agent. The polymer precursor, cross-linking agent and fluids are selected to prevent substantial diffusion of the polymer precursor away from the middle layer, and to allow a portion of the cross-linking agent to diffuse from the another layer into the middle layer to facilitate cross-linking of the polymer precursor in the middle layer to form a tubular polymer layer in a polymer fiber. The polymer layer thus has a cross-section generally corresponding to the cross-section of the middle layer.
摘要:
A polymer fiber is formed by hydrodynamic spinning. Fluids are forced to flow through a conduit to form a laminar flow comprising three or more layers of generally coaxial fluid flows, at respective flow rates selected to define a cross-section of a tubular middle layer of the fluid flows. The middle layer comprises a cross-linkable polymer precursor. Another layer of the fluid flows comprise a cross-linking agent. The polymer precursor, cross-linking agent and fluids are selected to prevent substantial diffusion of the polymer precursor away from the middle layer, and to allow a portion of the cross-linking agent to diffuse from the another layer into the middle layer to facilitate cross-linking of the polymer precursor in the middle layer to form a tubular polymer layer in a polymer fiber. The polymer layer thus has a cross-section generally corresponding to the cross-section of the middle layer.
摘要:
There is provided a method of conjugating a polymer containing a free aldehyde group with a flavonoid in the presence of an acid catalyst, such that the polymer is conjugated to the C6 or C8 position of the flavonoid A ring. The resulting conjugates may be used to form delivery vehicles to deliver high doses of flavonoids, and may also be used as delivery vehicles to deliver an additional bioactive agent.
摘要:
In a process of forming a hydrogel from a mixture comprising hydrogen peroxide (H2O2), horseradish peroxidase (HRP), and a polymer comprising a crosslinkable phenol group, the gelation rate in the solution and the crosslinking density in the hydrogel can be independently adjusted or controlled by selection of the molarity of H2O2 and concentration of HRP in the solution when the molarity of H2O2 is limited to be within a range and the concentration of HRP is limited to be above a threshold. A method for determining the range and threshold is disclosed. The hydrogel may be used to grow cells, in which case, the molarity of H2O2 may be selected to affect the differentiation or growth rate of the cells in the hydrogel. Also, the hydrogel system may be used for sustained delivery of a therapeutic protein, for example in the treatment of liver cancer, fibrosis or hepatitis.
摘要翻译:在由包含过氧化氢(H 2 O 2),辣根过氧化物酶(HRP)和包含可交联酚基的聚合物的混合物形成水凝胶的方法中,可以独立地调节溶液中的凝胶化速率和水凝胶中的交联密度, 当H 2 O 2的摩尔浓度被限制在一个范围内并且HRP的浓度被限制在高于阈值时,通过选择H 2 O 2的摩尔浓度和HRP浓度来控制。 公开了一种用于确定范围和阈值的方法。 水凝胶可用于生长细胞,在这种情况下,可以选择H2O2的摩尔浓度来影响水凝胶中细胞的分化或生长速率。 此外,水凝胶系统可用于持续递送治疗性蛋白质,例如用于治疗肝癌,纤维化或肝炎。