Clinical data | |
---|---|
Trade names | Antrypol, 309 Fourneau, Bayer 205, others |
AHFS/Drugs.com | Drugs.com archive |
Routes of administration | by injection only |
ATC code | |
Identifiers | |
| |
CAS Number | |
PubChem CID | |
IUPHAR/BPS | |
DrugBank | |
ChemSpider | |
UNII | |
KEGG | |
ChEBI | |
ChEMBL | |
PDB ligand | |
CompTox Dashboard (EPA) | |
ECHA InfoCard | 100.005.145 |
Chemical and physical data | |
Formula | C51H40N6O23S6 |
Molar mass | 1297.26 g·mol−1 |
3D model (JSmol) | |
| |
| |
(what is this?) (verify) |
Suramin is a medication used to treat African sleeping sickness and river blindness. [1] [2] It is the treatment of choice for sleeping sickness without central nervous system involvement. [3] It is given by injection into a vein. [4]
Suramin causes a fair number of side effects. [4] Common side effects include nausea, vomiting, diarrhea, headache, skin tingling, and weakness. [2] Sore palms of the hands and soles of the feet, trouble seeing, fever, and abdominal pain may also occur. [2] Severe side effects may include low blood pressure, decreased level of consciousness, kidney problems, and low blood cell levels. [4] It is unclear if it is safe when breastfeeding. [2]
Suramin was made at least as early as 1916. [5] It is on the World Health Organization's List of Essential Medicines. [6] In the United States it can be acquired from the Centers for Disease Control (CDC). [3] In regions of the world where the disease is common suramin is provided for free by the World Health Organization (WHO). [7]
Suramin is used for treatment of human sleeping sickness caused by trypanosomes. [1] Specifically, it is used for treatment of first-stage African trypanosomiasis caused by Trypanosoma brucei rhodesiense and Trypanosoma brucei gambiense without involvement of central nervous system. [8] [9] It is considered first-line treatment for Trypanosoma brucei rhodesiense , and second-line treatment for early-stage Trypanosoma brucei gambiense , where pentamidine is recommended as first line. [9]
It has been used in the treatment of river blindness (onchocerciasis). [2]
It is unknown whether it is safe for the baby when a woman takes it while breastfeeding. [2]
The most frequent adverse reactions are nausea, vomiting, diarrhea, abdominal pain, and a feeling of general discomfort. It is also common to experience various sensations in the skin, from crawling or tingling sensations, tenderness of palms and the soles, and numbness of hands, arm, legs or feet. [10] Other skin reactions include skin rash, swelling and stinging sensation. [10] Suramin can also cause loss of appetite and irritability. [10] Suramin causes non-harmful changes in urine during use, specifically making the urine cloudy. [10] It may exacerbate kidney disease. [11]
Less common side effects include extreme fatigue, ulcers in the mouth, and painful tender glands in the neck, armpits and groin. [10] Suramin uncommonly affects the eyes causing watery eyes, swelling around the eyes, photophobia, and changes or loss of vision. [10]
Rare side effects include hypersensitivity reactions causing difficulty breathing. Other rare systemic effects include decreased blood pressure, fever, rapid heart rate, and convulsions. [10] Other rare side effects include symptoms of liver dysfunction such as tenderness in upper abdomen, jaundice in eyes and skin, unusual bleeding or bruising. [10]
Suramin has been applied clinically to HIV/AIDS patients resulting in a significant number of fatal occurrences and as a result the application of this molecule was abandoned for this condition. [12]
Suramin is not orally bioavailable and must be given intravenously. Intramuscular and subcutaneous administration could result in local tissue inflammation or necrosis [ citation needed ]. Suramin is approximately 99-98% protein bound in the serum and has a half-life of 41–78 days average of 50 days; however, the pharmacokinetics of suramin can vary substantially between individual patients. Suramin does not distribute well into cerebral spinal fluid and its concentration in the tissues is equivalently lower than its concentration in the plasma. Suramin is not extensively metabolized and about 80% is eliminated via the kidneys. [11]
The mechanism of action for suramin is unclear, but it is thought that parasites are able to selectively uptake suramin via receptor-mediated endocytosis of drug that is bound to low-density lipoproteins and, to a lesser extent, other serum proteins. [11] Once inside parasites, suramin combines with proteins, especially trypanosomal glycolytic enzymes, to inhibit energy metabolism. [13]
The molecular formula of suramin is C51H40N6O23S6. It is a symmetric molecule in the center of which lies a urea (NH–CO–NH) functional group. Suramin contains six aromatic systems – four benzene rings, sandwiched by a pair of naphthalene moieties – plus four amide functional groups (in addition to the urea) and six sulfonic acid groups. When given as a medication, it is usually delivered as the sodium sulfonate salt as this formulation is water-soluble, though it does deteriorate rapidly in air. [11]
The synthesis of suramin itself and structural analogs is by successive formation of the amide bonds from their corresponding amine (aniline) and carboxyl (as acyl chloride) components. Various routes to these compounds have been developed, including starting from separate naphthalene structures and building towards an eventual unification by formation of the urea [14] [15] or starting with a urea and appending successive groups. [16]
Suramin was first made by the chemists Oskar Dressel, Richard Kothe and Bernhard Heymann at Bayer AG laboratories in Elberfeld, after research on a series of urea-like compounds. The drug is still sold by Bayer under the brand name Germanin. The chemical structure of suramin was kept secret by Bayer for commercial and strategic reasons, but it was elucidated and published in 1924 by Ernest Fourneau and his team at the Pasteur Institute. [17] : 378–379 [18]
It is also used as a research reagent to inhibit the activation of heterotrimeric G proteins in a variety of GPCRs with varying potency. It prevents the association of heteromeric G proteins and therefore the receptors guanine exchange functionality (GEF). With this blockade the GDP will not release from the Gα subunit so it can not be replaced by a GTP and become activated. This has the effect of blocking downstream G protein mediated signaling of various GPCR proteins including rhodopsin, the A1 adenosine receptor, the D2 receptor, [19] the P2 receptor, [20] [21] and ryanodine receptors. [22] Suramin is also an inhibitor of ABC-type [23] and P-type [24] ATPases, which acts competitively with ATP.
Suramin was studied as a possible treatment for prostate cancer in a clinical trial. [25]
Suramin has been studied in a mouse model of autism and in a small phase I/II human trial. [26] [27] [28] [29] Results from a randomized clinical study found no statistically significant effects of suramin (in either 10mg or 20mg doses) versus placebo on boys with moderate to severe autism spectrum disorder. [30]
Suramin is a reversible and competitive protein tyrosine phosphatase (PTPases) inhibitor, also is the potent inhibitor of sirtuins, purified topoisomerase II and SARS-CoV-2 RNA-dependent RNA polymerase (RdRp). [31]
African trypanosomiasis is an insect-borne parasitic infection of humans and other animals.
Pentamidine is an antimicrobial medication used to treat African trypanosomiasis, leishmaniasis, Balamuthia infections, babesiosis, and to prevent and treat pneumocystis pneumonia (PCP) in people with poor immune function. In African trypanosomiasis it is used for early disease before central nervous system involvement, as a second line option to suramin. It is an option for both visceral leishmaniasis and cutaneous leishmaniasis. Pentamidine can be given by injection into a vein or muscle or by inhalation.
Mirtazapine, sold under the brand name Remeron among others, is an atypical tetracyclic antidepressant, and as such is used primarily to treat depression. Its effects may take up to four weeks but can also manifest as early as one to two weeks. It is often used in cases of depression complicated by anxiety or insomnia. The effectiveness of mirtazapine is comparable to other commonly prescribed antidepressants. It is taken by mouth.
Amitriptyline, sold under the brand name Elavil among others, is a tricyclic antidepressant primarily used to treat major depressive disorder, and a variety of pain syndromes such as neuropathic pain, fibromyalgia, migraine and tension headaches. Due to the frequency and prominence of side effects, amitriptyline is generally considered a second-line therapy for these indications.
Trypanosomiasis or trypanosomosis is the name of several diseases in vertebrates caused by parasitic protozoan trypanosomes of the genus Trypanosoma. In humans this includes African trypanosomiasis and Chagas disease. A number of other diseases occur in other animals.
Atomoxetine, sold under the brand name Strattera, is a selective norepinephrine reuptake inhibitor medication used to treat attention deficit hyperactivity disorder (ADHD) and, to a lesser extent, cognitive disengagement syndrome. It may be used alone or along with psychostimulants. It enhances the executive functions of self-motivation, sustained attention, inhibition, working memory, reaction time and emotional self-regulation. Use of atomoxetine is only recommended for those who are at least six years old. It is taken orally. The effectiveness of atomoxetine is comparable to the commonly prescribed stimulant medication methylphenidate.
Donepezil, sold under the brand name Aricept among others, is a medication used to treat dementia of the Alzheimer's type. It appears to result in a small benefit in mental function and ability to function. Use, however, has not been shown to change the progression of the disease. Treatment should be stopped if no benefit is seen. It is taken by mouth or via a transdermal patch.
Cimetidine, sold under the brand name Tagamet among others, is a histamine H2 receptor antagonist that inhibits stomach acid production. It is mainly used in the treatment of heartburn and peptic ulcers.
Tamoxifen, sold under the brand name Nolvadex among others, is a selective estrogen receptor modulator used to prevent breast cancer in women and men. It is also being studied for other types of cancer. It has been used for Albright syndrome. Tamoxifen is typically taken daily by mouth for five years for breast cancer.
Melarsoprol is an arsenic-containing medication used for the treatment of sleeping sickness. It is specifically used for second-stage disease caused by Trypanosoma brucei rhodesiense when the central nervous system is involved. For Trypanosoma brucei gambiense, eflornithine or fexinidazole is usually preferred. It is effective in about 95% of people. It is given by injection into a vein.
Cabergoline, sold under the brand name Dostinex among others, is a dopaminergic medication used in the treatment of high prolactin levels, prolactinomas, Parkinson's disease, and for other indications. It is taken by mouth.
Eflornithine, sold under the brand name Vaniqa among others, is a medication used to treat African trypanosomiasis and excessive hair growth on the face in women. Specifically it is used for the second stage of sleeping sickness caused by T. b. gambiense and may be used with nifurtimox. It is taken intravenously or topically. It is an ornithine decarboxylase inhibitor.
Doxepin is a medication belonging to the tricyclic antidepressant (TCA) class of drugs used to treat major depressive disorder, anxiety disorders, chronic hives, and insomnia. For hives it is a less preferred alternative to antihistamines. It has a mild to moderate benefit for sleeping problems. It is used as a cream for itchiness due to atopic dermatitis or lichen simplex chronicus.
Trypanosoma brucei is a species of parasitic kinetoplastid belonging to the genus Trypanosoma that is present in sub-Saharan Africa. Unlike other protozoan parasites that normally infect blood and tissue cells, it is exclusively extracellular and inhabits the blood plasma and body fluids. It causes deadly vector-borne diseases: African trypanosomiasis or sleeping sickness in humans, and animal trypanosomiasis or nagana in cattle and horses. It is a species complex grouped into three subspecies: T. b. brucei, T. b. gambiense and T. b. rhodesiense. The first is a parasite of non-human mammals and causes nagana, while the latter two are zoonotic infecting both humans and animals and cause African trypanosomiasis.
A drug of last resort (DoLR), also known as a heroic dose, is a pharmaceutical drug which is tried after all other drug options have failed to produce an adequate response in the patient. Drug resistance, such as antimicrobial resistance or antineoplastic resistance, may make the first-line drug ineffective, especially in case of multidrug-resistant pathogens and tumors. Such an alternative may be outside of extant regulatory requirements or medical best practices, in which case it may be viewed as salvage therapy.
Nifurtimox, sold under the brand name Lampit, is a medication used to treat Chagas disease and sleeping sickness. For sleeping sickness it is used together with eflornithine in nifurtimox-eflornithine combination treatment. In Chagas disease it is a second-line option to benznidazole. It is given by mouth.
An antithyroid agent is a hormone inhibitor acting upon thyroid hormones.
Fexinidazole is a medication used to treat African trypanosomiasis caused by Trypanosoma brucei gambiense. It is effective against both first and second stage disease. Also a potential new treatment for Chagas disease, a neglected tropical disease that affects millions of people worldwide. It is taken by mouth.
Eluxadoline, sold under the brand names Viberzi and Truberzi, is a medication taken by mouth for the treatment of diarrhea and abdominal pain in individuals with diarrhea-predominant irritable bowel syndrome (IBS-D). It was approved for use in the United States in 2015. The drug originated from Janssen Pharmaceutica and was developed by Actavis.
Acoziborole (SCYX-7158) is an antiprotozoal drug invented by Anacor Pharmaceuticals in 2009, and now under development by the Drugs for Neglected Diseases Initiative for the treatment of African trypanosomiasis.
This article has an unclear citation style .(May 2017) |