Tigecycline Property

Melting point:

164-166°C

Boiling point:

890.9±65.0 °C(Predicted)

Density 

1.45±0.1 g/cm3(Predicted)

storage temp. 

Keep in dark place,Inert atmosphere,Store in freezer, under -20°C

solubility 

Soluble in DMSO (up to at least 25 mg/ml).

pka

4.50±1.00(Predicted)

form 

Orange powder

color 

Orange

Merck 

14,9432

Stability:

Stable for 1 year from date of purchase as supplied. Solutions in DMSO may be stored at -20° for up to 1 month.

InChI

InChI=1S/C29H39N5O8/c1-28(2,3)31-11-17(35)32-15-10-16(33(4)5)13-8-12-9-14-21(34(6)7)24(38)20(27(30)41)26(40)29(14,42)25(39)18(12)23(37)19(13)22(15)36/h10,12,14,21,31,36,38-39,42H,8-9,11H2,1-7H3,(H2,30,41)(H,32,35)/t12-,14-,21-,29-/m0/s1

InChIKey

FPZLLRFZJZRHSY-HJYUBDRYSA-N

SMILES

C1(=O)[C@]2(O)[C@@]([H])(C[C@@]3([H])C(=C2O)C(=O)C2=C(C(N(C)C)=CC(NC(CNC(C)(C)C)=O)=C2O)C3)[C@H](N(C)C)C(O)=C1C(N)=O

CAS DataBase Reference

220620-09-7(CAS DataBase Reference)

Safety

Safety Statements 

24/25

RIDADR 

3077

RTECS 

QI7619500

HazardClass 

9

PackingGroup 

III

HS Code 

29419090

Hazardous Substances Data

220620-09-7(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H319Causes serious eye irritation

H372Causes damage to organs through prolonged or repeated exposure

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P202Do not handle until all safety precautions have been read and understood.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P273Avoid release to the environment.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P308+P313IF exposed or concerned: Get medical advice/attention.

Tigecycline Chemical Properties,Usage,Production

Indications and Usage

Tigecycline is also called 9-tert-glycylaminomycetine or diclofenac, and it is a new type of venous injection antibiotic with broad-spectrum activities. It is a type of 9-tert-glycylaminomycetine derivative and is the first glycylcine antibiotic.
Tigecycline can serve as a second option after failed first-line treatment for multi-drug resistant bacteria, and it is also a new treatment option for patients who are allergic to penicillin or intolerable to other drugs. It can treat patients 18 years old or above with complex skin and skin structure infections or complex abdominal infections such as complex appendicitis, burn infections, abdominal abscesses, deep soft tissue infections, and ulcer infections.

Mechanisms of Action

Tigecycline’s mechanisms of action are similar to those of tetracycline antibiotics, which are binding with bacterial 30S ribosomes to prevent transfer RNA from entering, making it impossible for amino acids to form peptide chains, thus preventing bacterial protein synthesis and limiting bacterial growth. However, tigecycline’s ability to bind with ribosomes is 5 times that of other tetracycline antibiotics, which means that tetracycline’s anti-drug resistance ability is stronger. Tigecycline’s structure is similar to that of minocycline, but tigecycline’s antibacterial activity is much stronger, and bacteria are less likely to develop resistance to it compared to other tetracycline drugs, and it can also act on the methicillin-resistant Staphylococcus aureus. Tigecycline’s antifungal spectrum includes gram-positive bacteria, gram-negative bacteria and anaerobic bacteria. In vitro experiments and clinical trials showed that tigecycline is sensitive to some aerobic gram-negative bacteria (such as Citrobacter freundii, Enterobacter cloacae, Escherichia coli, Klebsiella pneumoniae and Klebsiella pneumoniae, Acinetobacter baumannii, Aeromonas hydrophila, Citrobacter Enterobacteriaceae, hemorrhagic Pasteurella, Serratia marcescens, and Stenotrophomonas maltophilia). Pseudomonas auruginosa is resistant to tigecycline.

Adverse reaction

The most common adverse effects are nausea and vomiting, which usually happens in the first 1-2 days of treatment and are mild to moderate in intensity. In a positive drug control clinical trial, 35% percent of complex skin and skin structure infection patients using tigecycline experienced nausea, and 20% experienced vomiting; vancomycin/aztreonam use caused 8.9% nausea and 4.2% vomiting. 25.3% of complex abdominal infection patients using tigecycline experienced nausea, and 19.5% experienced vomiting; vancomycin/aztreonam caused 20.5% nausea and 15.3% vomiting.

Description

The emergence of drug-resistant bacteria has diminished the clinical utility of the tetracyclines. Research to circumvent the efflux and ribosomal protection mechanisms of bacteria has led to the development of the glycylcyclines. Tigecycline is the first glycylcycline antibiotic to launch for the parenteral treatment of baterial infection, including complicated intra-abdominal and skin infections. Its mechanism of action involves inhibiting protein translation in bacteria by binding to the 30S ribosomal subunit and blocking entry of amino-acyl tRNA molecules into the A site of the ribosome to effectively prevent incorporation of amino acid residues into elongating peptide chains. Presumably, ribosomal protection proteins are ineffective against tigecycline due to its higher affinity for ribosomal binding compared to tetracyclines (approximately 16-fold). In addition, tigecycline may be resistant to efflux mechanisms by either their inability to translocate it across the cytoplasmic membrane due to steric complications or simply by their failure to recognize the molecule.

Description

Tigecycline is a broad-spectrum glycylcycline antibiotic that binds to the bacterial 30S ribosome, blocking the entry of transfer RNA, which halts protein synthesis and inhibits bacterial growth. It is active against a panel of 1,924 European clinical bacterial isolates including S. aureus, S. epidermidis, S. pneumoniae, E. faecalis, E. faecium, E. coli, K. pneumoniae, P. aeruginosa, and P. mirabilis strains (MICs = <1-32 μg/ml). In vivo, tigecycline (6.25 mg/kg twice daily for 5 days) decreases levels of C. difficile cytotoxin activity and spore formation in cecum and colon in a mouse model of C. difficile infection. Formulations containing tigecycline have been used in the treatment of a variety of bacterial infections.

Chemical Properties

Orange Solid

Originator

Wyeth (US)

Uses

antineoplastic

Uses

Tigecycline is a semi-synthetic tetracycline prepared by the introduction of a tert-butylaminoacetamido group into a previously unexplored and un-substituted region of existing tetracyclines. Like other tetracyclines, tigecycline acts by reversibly binding to the 30S ribosomal subunit and inhibits protein translation by blocking entry of aminoacyl-tRNA into the ribosome A site. The enhanced activity can be attributed to stronger binding affinity, thus minimising the impact of existing mechanisms of resistance. Tigecycline is regarded as the first of a new class of glycylcyline antibiotics. Critical comparison to the tetracycline class appears to be lacking in the literature.

Uses

A broad spectrum glycylcycline antibiotic

Uses

A glycylcycline antibiotic, used to treat infection by drug resistant bacteria such as Staphylococcus aureus (Staph aureus) and Acinetobacter baumannii.

Definition

ChEBI: Tetracycline in which the hydroxy group at position 5 and the methyl group at position 6 are replaced by hydrogen, and with a dimethylamino substituent and an (N-tert-butylglycyl)amino substituent at positions 7 and 9, respe tively. A glycylcycline antibiotic, it has activity against a broad range of Gram-positive and Gram-negative bacteria, including tetracycline-resistant organisms. It is used for the intravenous treatment of complicated skin and skin structure infections ca sed by susceptible organisms.

brand name

Tygacil

Antimicrobial activity

It is as potent as, or more potent than, earlier tetracyclines and activity is retained against strains expressing acquired tetracycline resistance determinants. It displays better activity than tetracycline, doxycycline or minocycline against Streptococcus spp. and against Enterococcus faecalis and E. faecium. Among Gram-negative organisms it displays improved activity against Citrobacter freundii, Escherichia coli, Enterobacter cloacae, Klebsiella pneumoniae, Salmonella spp., Serratia marcescens and Shigella spp. The spectrum includes rapidly growing mycobacteria. Ps. aeruginosa, Pr. mirabilis, other Proteus spp. and some strains of Corynebacterium jeikeium are resistant. Activity against strains expressing acquired resistance to earlier tetracyclines is attributed to failure of the MFS efflux pumps to recognize tigecycline, and to a novel mechanism of ribosome binding that permits tigecycline to overcome ribosomal protection mechanisms.
Comparative susceptibility data for some atypical pathogens are not available. However, in common with earlier tetracyclines, it is active against Chlamydophila and Mycoplasma spp. and rapidly growing Mycobacteria spp. It is less active than minocycline or tetracycline against U. urealyticum.

General Description

Tigecycline (Tygacil) is a first-in-class (a glycylcycline) intravenousantibiotic that was designed to circumvent manyimportant bacterial resistance mechanisms. It is not affectedby resistance mechanisms such as ribosomal protection, effluxpumps, target site modifications, β-lactamases, or DNAgyrase mutations. Tigecycline binds to the 30S ribosomalsubunit and blocks peptide synthesis. The glycylcyclinesbind to the ribosome with five times the affinity of commontetracyclines. Tigecycline also possesses a novel mechanismof action, interfering with the mechanism of ribosomal protectionproteins. Tigecycline, unlike common tetracyclines,is not expelled from the bacterial cell by efflux pumpingprocesses.
Tigecycline is recommended for the treatment of complicatedskin and skin structure infections caused by E. coli,E. faecalis (vancomycin-susceptible isolates), S. aureus(methicillin-susceptible and methicillin-resistant isolates),S. pyogenes, and B. fragilis among others. Tigecycline is alsoindicated for complicated intra-abdominal infections causedby strains of Clostridium, Enterobacter, Klebsiella, andBacteroides. To reduce the development of resistance to tigecycline,it is recommended that this antibiotic be used onlyfor those infections caused by proven susceptible bacteria.Glycylcyclines are structurally similar to tetracyclines,and appear to have similar adverse effects. These mayinclude photosensitivity, pancreatitis, and pseudotumorcerebri. Nausea and vomiting have been reported.

Pharmaceutical Applications

9-T-butylglycylamido-minocycline. A compound of the glycylcycline class available as a powder for intravenous infusion.

Pharmacokinetics

C_max 100 mg intravenous infusion (1 h): 0.85–1 mg/L
Plasma half-life: 37–67 h
Volume of distribution: 7–10 L/kg
Plasma protein binding: 68%
Distribution and excretion
It is widely distributed and is concentrated in the gallbladder, colon and lung. The volume of distribution is dose related and variable, but is generally greater than that of older tetracyclines. CSF penetration is poor. Tigecycline is excreted in the feces and urine predominantly as the unchanged molecule. The elimination half-life is long (37–67 h). Tigecycline clearance is decreased by 20% in patients with renal failure. No dosage adjustments are apparently necessary for tigecycline in patients with renal impairment.

Clinical Use

Complicated skin and skin structure infections
Complicated intra-abdominal infections
Community-acquired bacterial pneumonia
Recommended principally for the treatment of infections with multiresistant organisms.

Side effects

Side effects typical of the group, including nausea, vomiting, diarrhea and headache, occur. Occasional cases of pancreatitis, hypoproteinemia, antibiotic-associated colitis and thrombocytopenia have also been reported.

Synthesis

It does not require dosage adjustment in patients with impaired renal function and is conveniently dosed every 12 hours. Synthesis of tigecycline started with nitration of 138 with potassium nitrate and concentrated sulfuric acid to give 9-nitro derivative 139 in 93 % yield as disulfate salt, which was hydrogenated over Pd/C in 2-methoxyethanol/ 2N sulfuric acid at 40 psi to provide 9-aminominocycline (140). Finally, 9-aminominocycline (140) is acylated directly with N-tert-butylglycyl chloride in a 1:5 mixture of acetonitrile and N, N-dimethylpropyleneurea (DMPU) with anhydrous sodium carbonate to give tigecycline (XX).

in vitro

tigecycline exihibited good in vitro activities. the range of mic90s was 0.12-0.5 μg/ml for vancomycin-susceptible and -resistant strains of enterococcus faecalis and enterococcus faecium [2]. tigecyclinewas concentrated in cells and eliminated primarily via biliary excretion. diminished renal function didn’t significantly alter its systemic clearance. tigecycline didn’t interfere with common cytochrome p450 enzymes, making pharmacokinetic drug interactions uncommon [3].the tissue penetration of tigecycline was excellent and the compound showed equivalence to imipenem/cilastatin in intra-abdominal infection and to vancomycin plus aztreonam in skin and skin structure infection [4].

in vivo

in an intraperitoneal systemic murine infection model, tigecycline exihibited in vivo activities against gisa, methicillin-susceptible s. aureus and methicillin-resistant s. aureus strains [2]. tigecycline and daptomycin showed similar in vivo efficacies against infections caused by the mssa strain (strain gc 4543) with the ed50s of 0.12 and 0.24 mg/kg, respectively. the ed50s of tigecycline was 0.72 mg/kg [2].

Drug interactions

Potentially hazardous interactions with other drugs
Anticoagulants: possibly enhanced anticoagulant effect of coumarins.
Oestrogens: possibly reduced contraceptive effects of oestrogens (risk probably small).

Metabolism

Tigecycline is not thought to be extensively metabolised, although some trace metabolites have been identified including a glucuronide, an N-acetyl metabolite, and a tigecycline epimer. Tigecycline is primarily eliminated (about 60
%) via biliary excretion of unchanged drug and some metabolites.

References

1) Greer (2006)?Tigecycline (Tygacil): the first in the glycylcycline class of antibiotics; Proc. (Bayl. Univ. Med. Cent.)?19?155 2) Peterson (2008)?A review of tigecycline – the first glycylcycline; Int. J. Antimicrob. Agents?32 Suppl 4?S215 3) Skrtic?et al.?(2011)?Inhibition of mitochondrial translation as a therapeutic strategy for human acute myeloid leukemia; Cancer Cell?20?674 4) Jia?et al.?(2016)?Tigecyclin targets nonsmall cell lung cancer through inhibition of mitochondrial function; Fundam. Clin. Pharmacol.?30?297 5) Hu?et al.?(2016)?Antibiotic drug tigecycline inhibits melanoma progression and metastasis in a p21CIP1/Waf1-dependent manner; Oncotarget?7?3171 6) D’Andrea?et al.?(2016)?The mitochondrial translational machinery as a therapeutic target in Myc-driven lymphomas.; Oncotarget?7?72415 7) Chen?et al.?(2019)?Inhibition of mitochondrial translation selectively targets osteosarcoma; Biochem. Biophys. Res. Commun. 515 9