32385-11-8 Usage
Description
Sisomicin, also known as Siseptin, is a gentamicin-like aminoglycoside antibiotic produced by Micromonospora inyoensis. It exhibits a broad-spectrum antibiotic activity and is very similar to gentamicin in its antimicrobial spectrum and other properties. Sisomicin is an off-white solid and has been commercially available in Europe as a sulfate under the brand name Siseptin (Schering).
Uses
Used in Pharmaceutical Industry:
Sisomicin is used as an antibacterial agent for its broad-spectrum antibiotic activity. It is particularly effective against Enterobacteriaceae and shows higher activity against Pseudomonas aeruginosa compared to gentamicin, although not as active as tobramycin. The drug is used to treat various infections, such as urinary tract infections and Gram-negative bacillary septicemias.
Used in Medical Treatments:
Sisomicin is used as a therapeutic agent for combating bacterial infections caused by susceptible organisms. It binds to ribosomes, inhibiting protein synthesis and leading to the death of bacteria. However, there is almost complete cross-resistance between gentamicin and sisomicin with most Gram-negative bacilli due to the action of plasmid-coded modifying enzymes.
Despite its similarities to gentamicin, sisomicin does not offer significant advantages over gentamicin and has had limited clinical trials. Its dosage, administration methods, and pharmacokinetics are similar to those of gentamicin, and the toxicity of the two drugs is also likely to be about the same.
Originator
Pathomyci n,Byk-Essex,W. Germany,1976
Manufacturing Process
Tank fermentation of Micromonospora inyoensis - Germination stage 1: Under
aseptic conditions, add a lyophilized culture (or cells obtained from a slant
culture) of M. inyoensis to a 300 ml shake flask containing 100 ml of the
following sterile medium:
Beef extract 3 g
Tryptone 5 g
Yeast extract 5 g
Dextrose 1 g
Starch 24 g
Calcium carbonate 2 g
Tap water 1,000 ml
Incubate the flask and its contents for 5 days at 35°C on a rotary shaker (280
rpm, 2'' stroke).Germination stage 2: Aseptically transfer 25 ml of the fermentation medium
of Germination stage 1 to a 2-l shake flask containing 500 ml of the above
described sterile germination medium. Incubate the flask and its contents for
3 days at 28{]C on a rotary shaker (280 rpm, 2'' stroke).Fermentation stage: Aseptically transfer 500 ml of the medium obtained from
Germination stage 2 to a 14-l fermentation tank containing 9.5 l of the
following sterile medium:
Dextrin 50 g
Dextrose 5 g
Soybean meal 35 g
Calcium carbonate 7 g
Cobalt chloride 10-6M
Tap water 1,000 ml
Antifoam (GE 60) 10 ml
Prior to sterilizing the above described medium, adjust the pH to 8.
Aerobically ferment for 66 to 90 hours while stirring at 250 rpm with air input
at 4.5 l/l/min and 25 psi. The potency of the antibiotic produced at the end of
this period reaches a peak of 150 to 225 mcm/ml and remains relatively
constant. The pH of the fermentation medium changes slightly during the
antibiotic production, varying in the range of 6.8 to 7.3.Isolation of Antibiotic 66-40 - The whole broth is adjusted to pH 2 with 6N
sulfuric acid. (For the purpose of this example, quantities are given in terms
of 170 l of fermentation broth obtained by pooling acidified broth from 17
batches.) The acidified broth is stirred for about 15 minutes and then filtered.
Wash the mycelium with water and combine the washings with the filtrate.
Adjust the pH of the filtrate to 7 with 6N ammonium hydroxide.To the neutralized filtrate, add sufficient oxalic acid to precipitate calcium and
filter. Reneutralize the filtrate with ammonium hydroxide. Charge the filtrate
onto a cationic exchange adsorption column containing 1,500 to 2,000 g of
IRC-50 Amberlite in its ammonium form. Discard the eluate, wash the resin
with water, and elute with 2N ammonium hydroxide. Collect 400 ml fractions
and monitor by disc testing with S. aureus ATCC-6538P. Combine active
fractions and evaporate to dryness under vacuum obtaining about 28 g of
crude Antibiotic 6640 having an activity of about 500 mcm/g.Purification of Antibiotic 66-40 - Dissolve 28 g of crude Antibiotic 6640 in 100
ml of distilled water and charge to an anion exchange adsorption column
(Dowex 1 x 2) in the hydroxyl form. Slurry 2,000 g of the resin in water into a
column 2,5" in diameter and 36" high. Elute the column with distilled water at
a rate of about 23 ml/min collecting 100 ml fractions and monitor with a
conductivity meter and by disc testing against Staphylococcus aureus.The disc testing provides a gross separation of antibiotic-containing eluate
fractions from those devoid of antibiotic. To insure that the fractions are
properly combined, a portion of each fraction is paper chromatographed using
the lower phase of a chloroform:methanol:17% ammonium hydroxide system
(2:1:1). Each paper is sprayed with ninhydrin and the eluates containing like
material are combined and lyophilized yielding about 5.7 g of Antibiotic 66-40
assaying about 900 mcm/mg.
Therapeutic Function
Antibiotic
Antimicrobial activity
A fermentation product of Micromonospora inyoensis. A dehydro
derivative of gentamicin C1a, supplied as the sulfate salt.
It is virtually identical to gentamicin in activity and pharmacokinetic
behavior. An intramuscular dose of 1–1.5 mg/kg
achieves a peak plasma concentration of 1.5–9.0 mg/L after
0.5–1 h. It is widely distributed in body water, but concentrations
in CSF are low, even in the presence of inflammation.
The plasma half-life is 2.5 h and protein binding is <10%.
It is eliminated almost completely over 24 h in the glomerular
filtrate. Excretion decreases proportionately with renal impairment and because of the virtual identity of the behavior
of the two compounds, a gentamicin nomogram can be used
to adjust dosage. About 40% of the dose is eliminated during
a 6-h dialysis period, during which the elimination half-life
falls to about 8 h.
Mild and reversible impairment of renal function occurs in
about 5% of patients. Nephrotoxicity is more likely to be seen
in those with pre-existing renal disease or treated concurrently
with other potentially nephrotoxic drugs. Ototoxicity mainly
affecting vestibular function has been found in about 1% of
patients. Neuromuscular blockade and other effects common
to aminoglycosides including rashes, paresthesiae, eosinophilia
and abnormal liver function tests have been described.
Its uses are identical to those of gentamicin, which it closely
resembles. It is of limited availability.
Check Digit Verification of cas no
The CAS Registry Mumber 32385-11-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,3,8 and 5 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 32385-11:
(7*3)+(6*2)+(5*3)+(4*8)+(3*5)+(2*1)+(1*1)=98
98 % 10 = 8
So 32385-11-8 is a valid CAS Registry Number.
InChI:InChI=1/C19H37N5O7.H2O4S/c1-19(27)7-28-18(13(26)16(19)24-2)31-15-11(23)5-10(22)14(12(15)25)30-17-9(21)4-3-8(6-20)29-17;1-5(2,3)4/h3,9-18,24-27H,4-7,20-23H2,1-2H3;(H2,1,2,3,4)/t9-,10+,11-,12+,13?,14-,15+,16-,17-,18-,19+;/m1./s1
32385-11-8Relevant articles and documents
Synthesis method of plazomicin or salt of plazomicin
-
Paragraph 0026-0029, (2020/01/14)
The invention relates to a synthesis method of plazomicin or salt of the plazomicin. Specifically, the synthesis method uses a compound 6 as a raw material, six steps of exchange reaction, amino protection reaction, PNZ protecting group removal reaction, reductive amination reaction, degradation reaction and amino-protecting group removal reaction are sequentially performed, and finally the plazomicin or the salt of the plazomicin is prepared. The details of specific steps are described in the description. The synthesis method has the advantages of being few in steps, high in reaction selectivity, simple in operation, low in material cost and the like, and is very suitable for industrial application.
TREATMENT OF URINARY TRACT INFECTIONS WITH ANTIBACTERIAL AMINOGLYCOSIDE COMPOUNDS
-
Page/Page column 51, (2010/12/17)
A method for treating a urinary tract infection in a mammal in need thereof is disclosed, the method comprising administering to the mammal an effective amount of an antibacterial aminoglycoside compound.
Process for the preparation of purified aminoglycoside antibiotics
-
, (2008/06/13)
The invention relates to an improved process for the isolation and purification of aminoglycoside antibiotics of Formula (I) as defined herein combining selective lipophilization of the compound of Formula (I) in the crude product obtained by fermentation with controlled liquid/liquid extraction.