摘要:
The invention relates to ultrasound contrast agents comprising a microbubble-generating suspension of a microparticulate X-ray contrast agent in a liquid carrier medium.
摘要:
The invention relates to non-crosslinked non-polypeptide polymers containing biodegradable lipophilic side chains incorporating methylene diester units of the formula --[--CO--O--C(R.sup.1 R.sup.2)--O--CO--]--, where R.sup.1 and R.sup.2 each represents a hydrogen atom or a carbon-attached monovalent organic group or R.sup.1 and R.sup.2 together form a carbon-attached divalent organic group. The lipophilic moieties are biodegradatively cleavable to yield a water-soluble polymer.
摘要:
The present invention relates to biodegradable polymers containing diester units of formula (I)--CO--O--C(R.sup.1 R.sup.2)--O--CO--where R.sup.1 and R.sup.2 each represents a hydrogen atom or a carbon-attached monovalent organic group, or R.sup.1 and R.sup.2 together form a carbon-attached divalent organic group.
摘要:
The invention provides the use of a physiologically tolerable, particulate, free or matrix-borne, ferrimagnetic or ferromagnetic material for the manufacture of a diagnostic agent for administration into the gastrointestinal tract, the reproductive tract, the urinary tract, a closed body cavity (e.g. into the synovial fluid or the vasculature) or the musculature for magnetometric imaging of the human or non-human animal body.
摘要:
Heterocylic chelating agents and salts thereof of formula I: ##STR1## wherein X represents a bond, O or S, or a group CHR.sup.1 or NR.sup.3 ; R.sup.1 represents H, a group OR.sup.3 or NR.sup.3 R.sup.3, or an alkyl or alkoxyalkyl group optionally substituted by a hydroxyl group or by a group NR.sup.3 R.sup.3 or CON.sup.3 R.sup.3 ;each R.sup.2 represents H, or an alkyl or alkoxy group optionally substituted by a hydroxyl or alkoxy group;each R.sup.3 represents H, an optionally hydroxylated alkyl group or a group CH.sub.2 Y;Y represents a group COZ, CON(OH)R.sup.4, POZ.sub.2 or SO.sub.2 Z;Z represents a group OR.sup.4, NR.sup.4 R.sup.4 or ##STR2## where each R.sup.11 is H, a hydroxyl group or an optionally hydroxylated alkyl group, s is 0, 1 or 2, and W is CHR.sup.11, NR.sup.11 or an oxygen atom; andeach R.sup.4 represents H, or an optionally mono- or poly-hydroxylated alkyl, alkoxyalkyl or polyalkoxyalkyl group;with the provisos that where s is 0 then W is CHR.sup.11 and that where X represents a bond or CHR.sup.1, at least one group R.sup.1 or R.sup.2 represents other than H or an unsubstituted alkyl group. A process for preparing these agents and methods of heavy metal detoxification using these agents are also described.
摘要:
There are provided chelating agents particularly useful for the preparations of diagnostic and therapeutic agents for magnetic resonance imaging, scintigraphy, ultrasound imaging, radiotherapy and heavy metal detoxification, said agents being compounds of formula X--CHR.sub.1 --NZ--(CHR.sub.1).sub.n --A--(CHR.sub.1).sub.m --NZ--CHR.sub.1 --X wherein (each of the groups Z is a group --CHR.sub.1 X or the groups Z together are a group --(CHR.sub.1).sub.q --A'--(CHR.sub.1).sub.r --, where A' is an oxygen or sulphur atom or a group --N--Y; A is a group --N--Y or A--(CHR.sub.1).sub.m -- represents a carbon-nitrogen bond or, when the groups Z together are a group --(CHR.sub.1).sub.q --A'--(CHR.sub.1).sub.r --, A may also represent an oxygen or sulphur atom; each Y, which may be the same or different, is a group --(CHR.sub.1).sub.p --N(CHR.sub.1 X).sub.2 or a group --CHR.sub.1 X; each X, which may be the same or different, is a carboxyl group or a derivative thereof or a group R.sub.1 ; each R.sub.1, which may be the same or different, is a hydrogen atom, a hydroxyalkyl group or an optionally hydroxylated alkoxy or alkoxyalkyl group; n, m, p, q and r are each 2, 3 or 4; with the provisos that at least two nitrogens carry a --CHR.sub.1 X moiety wherein X is a carboxyl group or a derivative thereof, that each --CHR.sub.1 X moiety is other than a methyl group, and that unless A' is oxygen or sulphur or A is N--(CHR.sub.1).sub.p --N(CHR.sub.1 X).sub.2 at least one R.sub.1 is other than hydrogen) and salts thereof.
摘要:
The present invention provides an acid addition salt of 5-aminolevulinic acid (5-ALA) or of a 5-ALA derivative (e.g. a 5-ALA ester) with an acid which has a pKa of about 5 or less, preferably about 3 or less, with the proviso that the acid is other than hydrochloric acid. Particularly preferred salts are those derived from acids selected from the group comprising sulphonic acid and its derivatives, hydrobromic acid, sulfuric acid, nitric acid and phosphoric acid. The salts in accordance with the invention are particularly suitable for use as photosensitizing agents in diagnosis and photochemotherapy of disorders or abnormalities of external or internal surfaces of the body.
摘要:
Provided herein are improved methods of photodynamic treatment and diagnosis of cancer and non-cancerous conditions in the gastrointestinal tract, e.g. in the colon, and in particular hyperosmotic enema preparations for use in such methods. The enema preparations comprise a photosensitizer which is 5-aminolevulinic acid (5-ALA) or a precursor or derivative thereof, e.g. a 5-ALA ester, in combination with at least one hyperosmotic agent. The methods and preparations herein described are particularly suitable for use in photodynamic methods of treating and/or diagnosing colorectal cancer.
摘要:
The invention relates to methods of introducing drugs into cells which are located in body cavities. In particular, it provides a photosensitizing agent for use in a method of introducing a drug molecule into the cytosol of a cell located within a body cavity, said method comprising the step of contacting said cell with said photosensitizing agent and said drug molecule, and irradiating the cell with light of a wavelength effective to activate the photosensitizing agent. Such methods are particularly suitable for use in the delivery of cytotoxic drugs in the treatment of cancer, especially bladder cancer, ovarian cancer, cervical cancer, lung cancer, brain cancer, colorectal cancer and cancers of the oral and nasal cavity.
摘要:
A peptide comprising a unit of formula (I) and having a molecular weight of less than 2000 wherein each X is independently an organic group, e.g. a C1-6 alkyl or C1-6 alkenyl group, preferably —CH2—CH═CH2, or the two X groups taken together can form a covalent or non-covalent link between the two O groups, preferably a C1-10 saturated or unsaturated carbon chain optionally interrupted by one or more heteroatoms selected from O, S, N, P, or Si, especially a C3-10 carbon chain or one X represents an azido group and the other an C2-6-alkynyl group; both Z's are the same and are O or S; each Y is independently C, CH, CH2, N or NH; R1 is H or C1-6 alkyl; R2 is H or C1-6 alkyl; R5 is a C1-6 alkyl group, preferably isopropyl; or a salt, ester or prodrug thereof.