Abstract:
Polymeric conjugates comprising a polymeric backbone having attached thereto a bone targeting moiety and a therapeutically active agent, wherein the bone targeting moiety is attached to one end of the polymeric backbone via a branching unit such that a molar ratio of the bone targeting moiety to the polymer is at least 2:1, are disclosed. Pharmaceutical compositions containing these conjugates and uses thereof in the treatment of bone related disorders are also disclosed.
Abstract:
The present invention reports a new method to selectively obtain conjugates, preferably monoconjugates, between a protein or a peptide and a polymer or other molecules containing an amino group by the use of transglutaminase in catalysis buffers containing an organic cosolvent miscible with water.
Abstract:
The present invention reports a new method to selectively obtain conjugates, preferably monoconjugates, between a protein or a peptide and a polymer or other molecules containing an amino group by the use of transglutaminase in catalysis buffers containing an organic cosolvent miscible with water.
Abstract:
The present invention relates to a process for the synthesis of conjugates of glycosaminoglycanes (GAG) with biologically active molecules of varying nature, comprising small molecules and macro-molecules. In particular, the present invention relates to the conjugation of hyaluronic acid (HA) and its derivatives with polypeptides and proteins with a biological action, such as, for example, interferons, erythropoietins, growth factors, insulin, cytokines, antibodies and hormones. An object of the present invention also relates to isolatable intermediates obtained by the partial or total reaction of GAG with protected amino aldehydes in the conjugation process mentioned above.
Abstract:
The present invention regards new polymeric conjugates of phospholipids comprehending at least a polymer conjugated, through a branched molecule, at least to two phospholipids, and their use, as such or in combination, with other amphypatic substances to deliver biologically active agents. The above reported new polymer-phospholipids conjugates can be used in preparations, 'kits', formulation of liposomes, for diagnostic application or in therapy.
Abstract:
There are disclosed chemically active poly(ethylene glycols) and other hydrophilic polymers that are suitable for coupling to pharmaceutically or diagnostically active agents such as peptides, oligonucleotides, proteins or non- peptide molecules. The compounds are represented by the formula Poly-(X-NH-CO-A) n wherein: Poly is a hydrophilic polymer having a molecular weight of from about 300 to 100000 Daltons; A together with -NH-CO- forms a reactive group; X is a spacer moiety or a bond; n is an integer comprised between 1 and 50. The active agents of interest which may be conjugated to the disclosed compounds may be selected from hemoglobin, insulin, urokinase, alpha- interferon, G-CSF, hGH, asparaginase, adenosine deaminase, superoxide dismutase and catalase.
Abstract translation:公开了化学活性聚(乙二醇)和其它亲水性聚合物,其适于与药学或诊断活性剂如肽,寡核苷酸,蛋白质或非肽分子偶联。 所述化合物由下式表示:Poly-(X-NH-CO-A)n N n其中:Poly是分子量为约300至100000道尔顿的亲水性聚合物; A与-NH-CO-一起形成反应性基团; X是间隔部分或键; 可以与所公开的化合物缀合的感兴趣的活性剂可以选自血红蛋白,胰岛素,尿激酶,α-干扰素,G-CSF,hGH,天冬酰胺酶,腺苷脱氨酶,超氧化物歧化酶 和过氧化氢酶。
Abstract:
Reactive polymers can be conjugated, directly or by means of linkers and/or others polymers to chelating agents comprising at least one phosphorous atom in the form of a phosphine or phosphine oxide (or precursors thereof) to form conjugates useful in diagnostic and therapeutic applications. In particular this invention provides conjugates comprising a hydrophilic polymer bound, directly or by means of other moieties, to at least one chelating group able to chelate metal radioisotopes comprising at least one phosphine or one phosphine oxide phosphorous. Such chelating groups can be conjugated to the hydrophilic polymer directly or via one or more linkers and/or one or more additional polymers. The use of additional polymers can provide increased loading of chelating agent. The linkers are preferably selected among alkyl groups or aromatic groups or cleavable peptides or other biodegradable sequences. Additionally, one or more targeting molecules can be linked to the hydrophilic polymer directly or by means of linkers and/or others polymers. Due to their polymeric structure, the conjugates according to the invention have enhanced specificity toward certain tissues, such as tumors, inflamed tissued and the liver. The specificity can be further increased by the additional provision of targeting moieties such as antibodies or sugars. These conjugates can be formulated for remaining in the blood circulation for a period for time suitable for diagnostic and therapeutic applications. Moreover they possess thermodynamic and kinetic stability, keeping the metal chelate intact under physiological conditions. The invention also provides a very simple and efficient method for the labelling of radiopharmaceuticals, which avoids the use of any additional reducing agent. Accordingly, metal ions like technetium or rhenium can be added as pertechnetate or pherrhenate to chelating agents comprising polymer and a phosphine and surprisingly it has been found that such chelating agents can act as reducing agents of the metal and the use of an additional reducing agent is not necessary. This allows the preparation of simple kits comprising a component (a) comprising the polymeric chelating agent and a component (b) comprising the metal ion in its highest oxidation state. These two components can be kept separately and combined together just before use to yield the metal complex without the need of further reducing step and purification.
Abstract:
Reactive polymers can be conjugated, directly or by means of linkers and/or others polymers to chelating agents comprising at least one phosphorous atom in the form of a phosphine or phosphine oxide (or precursors thereof) to form conjugates useful in diagnostic and therapeutic applications. In particular this invention provides conjugates comprising a hydrophilic polymer bound, directly or by means of other moieties, to at least one chelating group able to chelate metal radioisotopes comprising at least one phosphine or one phosphine oxide phosphorous. Such chelating groups can be conjugated to the hydrophilic polymer directly or via one or more linkers and/or one or more additional polymers. The use of additional polymers can provide increased loading of chelating agent. The linkers are preferably selected among alkyl groups or aromatic groups or cleavable peptides or other biodegradable sequences. Additionally, one or more targeting molecules can be linked to the hydrophilic polymer directly or by means of linkers and/or others polymers. Due to their polymeric structure, the conjugates according to the invention have enhanced specificity toward certain tissues, such as tumors, inflamed tissued and the liver. The specificity can be further increased by the additional provision of targeting moieties such as antibodies or sugars. These conjugates can be formulated for remaining in the blood circulation for a period for time suitable for diagnostic and therapeutic applications. Moreover they possess thermodynamic and kinetic stability, keeping the metal chelate intact under physiological conditions. The invention also provides a very simple and efficient method for the labelling of radiopharmaceuticals, which avoids the use of any additional reducing agent. Accordingly, metal ions like technetium or rhenium can be added as pertechnetate or pherrhenate to chelating agents comprising polymer and a phosphine and surprisingly it has been found that such chelating agents can act as reducing agents of the metal and the use of an additional reducing agent is not necessary. This allows the preparation of simple kits comprising a component (a) comprising the polymeric chelating agent and a component (b) comprising the metal ion in its highest oxidation state. These two components can be kept separately and combined together just before use to yield the metal complex without the need of further reducing step and purification.
Abstract:
The present invention relates to polyethylene glycol derivatives having a controlled release nitric oxide as well as their use as drugs. It has been surprisingly found that is possible connect physically or by chemical bonds polyethylene glycol nitrate with pharmacologically active molecules, such as anti-inflammatory, antitumoral drugs, peptides, proteins and oligonucleotides thus obtaining compounds having a better activities profile.