Biomaterial Database

Effect of L-threo-3,4-dihydroxyphenylserine on muscle sympathetic nerve activities in Shy-Drager syndrome. 1988

T Kachi, and S Iwase, and T Mano, and M Saito, and M Kunimoto, and I Sobue

Department of Neurology, National Chubu Hospital, Obu, Japan.

We observed changes in postganglionic efferent discharges of muscle sympathetic nerve (muscle sympathetic activity, MSA) microneurographically before and after the oral administration of L-threo-3,4-dihydroxyphenylserine (L-threo-DOPS), a precursor of norepinephrine, in a patient with Shy-Drager syndrome and irregular fluctuations of blood pressure. Before drug administration, MSA was only rarely observed with the patient in the supine position. There was a slight increase in MSA during head-up tilting to 40 degrees, and orthostatic hypotension (OH) occurred just after the body was tilted head upward to 40 degrees. MSA became prominent 30 minutes after the oral administration of 200 mg of L-threo-DOPS while the patient was in a 40 degree head-up position, and the OH was improved. The MSA discharge rate decreased and OH reappeared 3 hours after oral administration, when the plasma concentration of norepinephrine was at its highest level. We suggest that the OH improved mainly because of the increase in MSA due to L-threo-DOPS, and that the drug may activate sympathetic outflow at a site proximal to the sympathetic ganglion.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D009638	Norepinephrine	Precursor of epinephrine that is secreted by the ADRENAL MEDULLA and is a widespread central and autonomic neurotransmitter. Norepinephrine is the principal transmitter of most postganglionic sympathetic fibers, and of the diffuse projection system in the brain that arises from the LOCUS CERULEUS. It is also found in plants and is used pharmacologically as a sympathomimetic.	Levarterenol,Levonorepinephrine,Noradrenaline,Arterenol,Levonor,Levophed,Levophed Bitartrate,Noradrenaline Bitartrate,Noradrénaline tartrate renaudin,Norepinephrin d-Tartrate (1:1),Norepinephrine Bitartrate,Norepinephrine Hydrochloride,Norepinephrine Hydrochloride, (+)-Isomer,Norepinephrine Hydrochloride, (+,-)-Isomer,Norepinephrine d-Tartrate (1:1),Norepinephrine l-Tartrate (1:1),Norepinephrine l-Tartrate (1:1), (+,-)-Isomer,Norepinephrine l-Tartrate (1:1), Monohydrate,Norepinephrine l-Tartrate (1:1), Monohydrate, (+)-Isomer,Norepinephrine l-Tartrate (1:2),Norepinephrine l-Tartrate, (+)-Isomer,Norepinephrine, (+)-Isomer,Norepinephrine, (+,-)-Isomer
D001794	Blood Pressure	PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS.	Systolic Pressure,Diastolic Pressure,Pulse Pressure,Pressure, Blood,Pressure, Diastolic,Pressure, Pulse,Pressure, Systolic,Pressures, Systolic
D004525	Efferent Pathways	Nerve structures through which impulses are conducted from a nerve center toward a peripheral site. Such impulses are conducted via efferent neurons (NEURONS, EFFERENT), such as MOTOR NEURONS, autonomic neurons, and hypophyseal neurons.	Motor Pathways,Efferent Pathway,Pathway, Efferent,Pathways, Efferent
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001342	Autonomic Nervous System Diseases	Diseases of the AUTONOMIC NERVOUS SYSTEM, including sympathetic, parasympathetic, and enteric nervous systems.	Autonomic Disorders,Central Autonomic Nervous System Diseases,Disorders of the Autonomic Nervous System,Dysautonomia,Nervous System Diseases, Autonomic,Nervous System Diseases, Parasympathetic,Nervous System Diseases, Sympathetic,Non-Familial Dysautonomia,Parasympathetic Nervous System Diseases,Peripheral Autonomic Nervous System Diseases,Sympathetic Nervous System Diseases,ANS (Autonomic Nervous System) Diseases,ANS Diseases,Autonomic Central Nervous System Diseases,Autonomic Diseases,Autonomic Nervous System Disorders,Autonomic Peripheral Nervous System Diseases,Segmental Autonomic Dysfunction,ANS Disease,Autonomic Disease,Autonomic Disorder,Autonomic Dysfunction, Segmental,Autonomic Dysfunctions, Segmental,Disorder, Autonomic,Dysautonomia, Non-Familial,Dysautonomias,Non Familial Dysautonomia,Non-Familial Dysautonomias,Segmental Autonomic Dysfunctions
D012694	Serine	A non-essential amino acid occurring in natural form as the L-isomer. It is synthesized from GLYCINE or THREONINE. It is involved in the biosynthesis of PURINES; PYRIMIDINES; and other amino acids.	L-Serine,L Serine
D012791	Shy-Drager Syndrome	A progressive neurodegenerative condition of the central and autonomic nervous systems characterized by atrophy of the preganglionic lateral horn neurons of the thoracic spinal cord. This disease is generally considered a clinical variant of MULTIPLE SYSTEM ATROPHY. Affected individuals present in the fifth or sixth decade with ORTHOSTASIS and bladder dysfunction; and later develop FECAL INCONTINENCE; anhidrosis; ATAXIA; IMPOTENCE; and alterations of tone suggestive of basal ganglia dysfunction. (From Adams et al., Principles of Neurology, 6th ed, p536)	Autonomic Failure, Progressive,Idiopathic Orthostatic Hypotension, Shy-Drager Type,Orthostatic Hypotension, Dysautonomic,Dysautonomia-Orthostatic Hypotension Syndrome,Syndrome, Dysautonomia-Orthostatic Hypotension,Autonomic Failures, Progressive,Dysautonomia Orthostatic Hypotension Syndrome,Dysautonomia-Orthostatic Hypotension Syndromes,Dysautonomic Orthostatic Hypotension,Dysautonomic Orthostatic Hypotensions,Failure, Progressive Autonomic,Failures, Progressive Autonomic,Hypotension Syndrome, Dysautonomia-Orthostatic,Hypotension Syndromes, Dysautonomia-Orthostatic,Hypotension, Dysautonomic Orthostatic,Hypotensions, Dysautonomic Orthostatic,Idiopathic Orthostatic Hypotension, Shy Drager Type,Orthostatic Hypotensions, Dysautonomic,Progressive Autonomic Failure,Progressive Autonomic Failures,Shy Drager Syndrome,Syndrome, Dysautonomia Orthostatic Hypotension,Syndrome, Shy-Drager,Syndromes, Dysautonomia-Orthostatic Hypotension