β-lactam

Ertapenem (0-100 μg/mL approximately, 48 hours) is effective against 99.1% of all anaerobes, with MICs for B.fragilis and B.vulgatus species of ≥8 μg/mL and a mode MIC of 0.12 μg/mL and MIC90 of 1 μg/mL, respectively[1].

In a S. aureus thigh tissue infection model, ertapenem (subcutaneous injection, 0–10 mg/kg, 0-120 h after infection) reduces the organism by > 3 log10 CFU at 10 mg/kg and keeps the activity at 3.3 and 4.4 log10 CFU eliminated at 2 mg/kg[2].
In addition to being active against all gram-positive organisms, ertapenem (subcutaneous injection, 4 hours after infection, systemic infection model) is also active against gram-negative organisms with ED50s of less than 0.25 mg/kg/dose[2].

Cell Line: B. fragilis (ATCC 25285), B. thetaiotaomicron (ATCC 29741), and Eubacterium lentum (ATCC 43055)
Concentration: 0-100 μg/mL approximately
Incubation Time: 48 h
Result: 98.8% of the isolates in the B. fragilis group were susceptible, and 99.1% of all isolates were inhibited with a mode MIC of 0.12 μg/mL and MIC90 of 1 μg/mL.

Animal Model: S. aureus thigh tissue infection model (DBA/2 mice)[2]
Dosage: 0.5,1, 2, 5, 10 mg/kg (given at 2, 6, 10, 24, 48, 72, 96, 120 h)
Administration: Subcutaneous injection (0.5 mL after infection)
Result: showed a reduction in organism of > 3 log10 CFU at 10 mg/kg when compared to controls not treated with antibiotics. kept up the activity at 2 mg/kg, eliminating 3.3 and 4.4 log10 CFU.

[1]. Ertapenem (MK-0826), a new carbapenem: comparative in vitro activity against clinically significant anaerobes. Diagn Microbiol Infect Dis. 2002 Oct;44(2):181-6.

[2]. In vivo activity and pharmacokinetic evaluation of a novel long-acting carbapenem antibiotic, MK-826 (L-749,345). Antimicrob Agents Chemother. 1998 Aug;42(8):1996-2001.

[3]. Antimicrob Agents Chemother.2011 Nov;55(11):4943-60.

Ertapenem is meropenem in which the one of the two methyl groups attached to the amide nitrogen is replaced by hydrogen while the other is replaced by a 3-carboxyphenyl group. The sodium salt is used for the treatment of moderate to severe susceptible infections including intra-abdominal and acute gynaecological infections, pneumonia, and infections of the skin and of the urinary tract. It has a role as an antibacterial drug. It is a carbapenemcarboxylic acid and a pyrrolidinecarboxamide. It is a conjugate acid of an ertapenem(1-).

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Ertapenem is a 1-β methyl-carbapenem that is structurally related to beta-lactam antibiotics. It was first authorized for use in the US in November 2001 and in Europe in April 2002. Shown to be effective against a wide range of Gram-positive and Gram-negative aerobic and anaerobic bacteria, ertapenem is used to treat various bacterial infections. Ertapenem is a Penem Antibacterial. Ertapenem is a broad spectrum carbapenem antibiotic used primarily for the treatment of aerobic gram-negative bacterial infections. Ertapenem, like other carbapenems, is associated with transient and asymptomatic elevations in serum enzymes. The carbapenems have also been linked to rare instances of clinically apparent, acute cholestatic liver injury.

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Ertapenem is a 1-beta-methyl carbapenem and broad-spectrum beta-lactam antibiotic with bactericidal property. Ertapenem binds to penicillin binding proteins (PBPs) located on the bacterial cell wall, in particular PBPs 2 and 3, thereby inhibiting the final transpeptidation step in the synthesis of peptidoglycan, an essential component of the bacterial cell wall. Inhibition results in a weakening and subsequent lysis of the cell wall leading to cell death of Gram-positive and Gram-negative aerobic and anaerobic pathogens. This agent is stable against hydrolysis by a variety of beta-lactamases, including penicillinases, cephalosporinases and extended-spectrum beta-lactamases. A carbapenem derivative antibacterial agent that is more stable to renal dehydropeptidase I than IMIPENEM, but does not need to be given with an enzyme inhibitor such as CILASTATIN. It is used in the treatment of Gram-positive and Gram-negative bacterial infections including intra-abdominal infections, acute gynecological infections, complicated urinary tract infections, skin infections, and respiratory tract infections. It is also used to prevent infection in colorectal surgery.

C22H25N3O7S

475.5

475.14

C, 55.57; H, 5.30; N, 8.84; O, 23.55; S, 6.74

153832-46-3

Ertapenem sodium;153773-82-1;Ertapenem disodium;153832-38-3

150610

Solid powder

1.6±0.1 g/cm3

813.9±65.0 °C at 760 mmHg

446.0±34.3 °C

0.0±3.1 mmHg at 25°C

1.7

-1.07

181.57

O=C(C(N12)=C(S[C@@H]3CN[C@H](C(NC4=CC=CC(C(O)=O)=C4)=O)C3)[C@H](C)[C@]2([H])[C@@H]([C@H](O)C)C1=O)O

JUZNIMUFDBIJCM-ANEDZVCMSA-N

InChI=1S/C22H25N3O7S/c1-9-16-15(10(2)26)20(28)25(16)17(22(31)32)18(9)33-13-7-14(23-8-13)19(27)24-12-5-3-4-11(6-12)21(29)30/h3-6,9-10,13-16,23,26H,7-8H2,1-2H3,(H,24,27)(H,29,30)(H,31,32)/t9-,10-,13+,14+,15-,16-/m1/s1

(4R,5S,6S)-3-[(3S,5S)-5-[(3-Carboxyphenyl)carbamoyl]pyrrolidin-3-yl]sulfanyl-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid

MK 826; L-749345; MK-826; L749345; MK826; L 749345; MK-0826; MK 0826; MK0826; Ertapenem Sodium; Trade Name: Invanoz; Invanz

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

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Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).

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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)]
*Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline)

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Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).

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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders

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Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

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 (Please use freshly prepared in vivo formulations for optimal results.)