319 results about "Levodopa" patented technology

Provided is an improved treatment for Parkinson's Disease where the efficacy of L-Dopa treatment is increased by including gene therapy in the treatment regimen. The combination therapy results in long-term improvements in response to L-Dopa and diminished side effects caused by L-Dopa.

The invention provides a method, and dosage form therefor, of treating impaired motor function associated with Parkinson's disease, anti-Parkinson's drug treatment, e.g. L-Dopa therapy, and/or dementia associated with Parkinson's disease. The invention includes the combined administration of an NMDA receptor antagonist and an antidepressant, e.g., the combination of amantadine and citalopram or venlafaxine, or an NMDA receptor antagonist and an anxiolytic agent, e.g., amantadine and buspirone or trazodone, for the amelioration of undesired tremors, akinesia, dyskinesia, or bradykinesia associated with one or more different disorders or diseases. The drugs can be included in a single dosage form. One embodiment includes a combination dosage form containing each drug in controlled release forms. Another embodiment includes a combination dosage form providing a controlled release of an NMDA receptor antagonist and a rapid release of a neuroactive agent after administration to a subject.

The present invention provides a pharmaceutical composition for use in a dosage form for oral administration to a patient. The composition expands upon contact with gastric fluid and promotes retention of the dosage form in the patient's stomach for a prolonged period of time. The present invention further provides pharmaceutical dosage forms containing an active ingredient, and the pharmaceutical composition. The forms are adapted for immediate or controlled release of the active ingredient. The dosage forms may be used advantageously in the treatment of Parkinson's disease with levodopa and hyperactivity and attention deficit disorder with methylphenidate.

In one aspect, the invention is related to a method of treating a patient with Parkinson's disease, the method including administering to the respiratory tract of the patient particles that include more than about 90 weight percent (wt %) of levodopa. The particles are delivered to the patient's pulmonary system, preferably to the alveoli or the deep lung.

The invention features methods compositions and infusion pumps for infusing levodopa prodrugs (e.g., levodopa esters, levodopa amides, levodopa carboxamides, and levodopa sulfonamides) for the treatment of Parkinson's disease.

A method of treating neurotransmitter dysfunction in a patient. The method includes the step of administering an amino acid precursor of a catecholamine in a balanced and effective therapeutic range. The catecholamine precursor is preferably L-dopa, but may alternatively be tyrosine, D,L-Phenylalanine or an active isomer thereof, and N-acetyl-L-tyrosine or other amino acid precursor of L-dopa. An amino acid precursor of serotonin in an effective therapeutic range, is also administered. The serotonin precursor is preferably 5-HTP, but may alternatively be tryptophan. At least one cofactor is also preferably administered. Cofactor options include Vitamin B6, Vitamin C, Calcium, Folate, and Cysteine. A method of periodic administration and patient checking is also disclosed.

The invention discloses tyrosine phenol-lyase (TPL) mutant of fusobacterium nucleatum, a gene, a carrier, an engineered bacteria strain, and applications of the TPL mutant of fusobacterium nucleatum in synthetizing levodopa. Compared with the wild type, the TPL mutant of fusobacterium nucleatum provided by the invention has the more excellent catalytic performance. The accumulated concentration in synthesizing levodopa of the TPL mutant of fusobacterium nucleatum achieves 140g/L or above, compared with that of the wild type, the accumulated concentration is improved by 17-25 %, and the optical purity is greater than 99.5%; the conversion rate of the substrate, namely, catechol achieves 99.8% or above, and compared with that of the wild type, the conversion rate is improved by 15-20 %.

The present invention relates to a method of producing neurons that express the enzyme tyrosine hydroxylase (TH) by subjecting neural stem cells to FGF-1, a protein kinase A activator, a protein kinase C activator, and dopamine/L-DOPA. Surprisingly, when forskolin is used as a protein kinase A activator, it requires only low levels of FGF-1 and forskolin to efficiently produce TH positive neurons from fetal or adult neural stem cells. Also provided are compositions used to produce TH positive neurons and the resulting neural cell culture, as well as a method of treating disease or conditions which are associated with dopamine neuron loss or dysfunction.

The present invention encompasses compositions for the treatment of Parkinson's disease comprising a therapeutically effective amount of levodopa or a metabolic precursor thereof and at least one dopamine transport inhibitor in sufficient amount to decrease dopamine degradation, wherein the dopamine transport inhibitor is administered to avoid dyskinesia.

The invention discloses a method for extracting L-DOPA from velvet beans. The method includes the steps that after the velvet beans are crushed, hydrochloric acid with the mass ratio being 1%.-3%. is used for conducting subcritical extraction, after an extracting solution is concentrated, standing, staying overnight and devitrification are carried out, and accordingly a crude extract is obtained; after the crude extract is dissolved by diluted hydrochloric acid, activated carbon is added for conducting reflux, then the activated carbon is filtered and removed, the pH of the filter liquor is adjusted to be 3.0-4.0 by using an alkaline agent, standing, staying overnight and devitrification are carried out, and after drying is completed, a finished product can be obtained. The method for extracting the L-DOPA from the velvet beans is simple in method, few in step, short in time, and a reagent is saved; the yield of the finished product is 2.8%-3.0%, the content can reach up to 98%, a great number of substances such as inorganic salt do not need to be added in the extracting process, exceeding of heavy metal and the like is avoided, and therefore product quality can not be affected.

L-DOPA amide derivatives, pharmaceutical compositions containing same and their use in the treatment of conditions associated with impaired dopaminergic activity/signaling (e.g., Parkinson disease) are disclosed.

This invention provides methods of treating motor disorder side effects associated with the administration of levodopa to a subject having Parkinson's disease, by administering a dose of eltoprazine or a pharmaceutically acceptable acid addition salt thereof. In particular, the invention provides methods for reducing dyskinesia associated with Parkinson's disease treatments, and effective doses of eltoprazine or a pharmaceutically acceptable acid addition salt thereof.

The invention features methods, compositions, dosing regimens, and infusion pumps for subcutaneously infusing acidic solutions of L-DOPA prodrugs, such as esters and amides of L-DOPA, for the treatment of Parkinson's disease. The methods and acidic compositions of the invention can reduce the severity and rate of occurrence of transient local swelling, erythema, and persistent subcutaneous granulomas associated with subcutaneous delivery of certain agents used in the treatment of Parkinson's disease.

The invention discloses a method for improving biosynthesis of levodopa. The method comprises the following steps of: (1) using SEQ ID No.1 and SEQ ID No.2 as the primers, using an E.coli BL21 strain as the template, amplifying and recycling so as to obtain a hpaBC gene segment, conducting double digestion on a pCDFDuet-1 plasmid and the hpaBC gene segment, connecting and preparing a recombinant plasmid pBET1; (2) introducing the recombinant plasmid pBET1 into host escherichia coli so as to obtain transformed host cells; and (3) selecting the transformed host cells so as to obtain a levodopa production engineering bacteria single colony, taking 1ml of the levodopa production engineering bacteria single colony and putting into 100ml of a first culture medium, cultivating and measuring OD600, adding an isopropyl-beta-D-sulfo-pyran galactoside water solution and ascorbic acid, continuing cultivating and measuring the content of the levodopa. By utilizing the method disclosed by the invention, the output of the levodopa is increased, the production cost is lowered, and the operation process is simplified.

The invention discloses a method for preparing levodopa by virtue of an enzymic method. The method comprises the following steps: picking up an annular stenotrophomonas maltophilia strain slant for inoculation into a seed culture medium for culturing, thereby obtaining a primary seed liquid; inoculating a fermentation culture medium with the primary seed liquid at the inoculum size of 3-10% for fermentation culturing, centrifuging after the fermentation is ended and collecting bacterial cells; and adding tyrosine and the bacterial cells to a buffer solution to have an enzymatic reaction under the conditions of 18-30 DEG C and the pH of 5.0-6.0, thereby converting the tyrosine into the levodopa. According to the method, due to the resting cell transformation technology, and the preferred intermittent weak ventilation technology, adopted in the transformation process, the catalytic efficiency of the enzyme is improved; the concentration of the levodopa is 27g/L and the molar transformation rate of the tyrosine is above 99%; and besides, the method is mild in conditions, high in enantio-selectivity and free from racemization effect, is more suitable for industrial production, and has remarkable economic benefit and industrial application value.

The present invention provides a capsule containing an inhalable powder composition wherein the composition comprises about 75% by weight or more levodopa, dipalmitoylphosphatidylcholine (DPPC) and a salt characterized by a working density of less than about 100 g/L. The invention further provides a capsule containing an inhalable powder composition wherein the composition comprises about 75% by weight or more levodopa, dipalmitoylphosphatidylcholine (DPPC) and a salt characterized by a working density of less than about 100 g/L wherein the capsule material comprises hydroxypropylmethylcellulose (HPMC) and titanium dioxide.

The invention discloses escherichia coli expressing thermostable tyrosine phenolase and application thereof, and belongs to the technical field of bioengineering. According to the invention, escherichia coli BL21 is taken as a host, recombinant plasmids pET-28(a)-TPL and 25 tyrosine phenolase mutants are expressed, recombinant escherichia coli containing mutant plasmids for producing L-DOPA is obtained, whole-cell transformation is carried out on the obtained recombinant bacteria to produce the L-DOPA, the yield of the L-DOPA produced by the recombinant bacteria expressing the pET-28(a)-TPL (E313M) reaches 54.9 g/L, compared with a control strain, the yield increases by 142.9%, the half-life period of the expressed tyrosine phenolase is improved to 37.9 min, 17.1 min and 14.6 min respectively under the conditions of 20 DEG C, 40 DEG C and 60 DEG C. The escherichia coli lays the foundation for the L-DOPA production by the escherichia coli modified by metabolic engineering.

A mutant tyrosine repressor that does not require tyrosine to induce expression of tyrosine phenol-lyase gene is obtained by introducing a mutation into a tyrosine repressor. A microorganism which is able to express large amounts of tyrosine phenol-lyase is obtained by introducing the mutant tyrosine repressor into the microorganism. The microorganism is useful for producing L-DOPA.

The invention discloses a method for preparing levodopa by using Mucuna pruriens and belongs to the technical field of drug production and processing. The method specifically comprises the following seven steps: removing impurities and crushing; extracting by acid water; concentrating; extracting; decoloring; crystallizing; and drying. The method has the beneficial effects that the extraction rate of levodopa can be improved by over 1.2%, the purity reaches 89.3%, the processing time is shortened and the energy consumption is reduced.