Pharmaceutical compositions comprising selected lactobacillus strains

Abstract

Topical pharmaceutical compositions, suited for the use in gynecology and urology, comprise as active principles selected Lactobacillus strains isolated from vaginal or urologic habitat of asymptomatic patients.

Description

The present invention concerns pharmaceutical compositions suited for the treatment of vaginal and urological diseases, containing selected strains of microorganisms of the "Lactobacillus" genus.

A further object of the invention is provided by said strains.

The use of lactic acid bacteria in gynecology has already been proposed (FR 6838 M and U.S. Pat. No. 4592748).

Their use in urology has been disclosed, for instance, by:

a) Andrew W. BRUCE--Gregor REID: "Intravaginal instillation of lactobacilli for prevention of recurrent urinary tract infections";

b) Gregor REID--Andrew W. BRUCE--Mojtaba BEHESATI: "Effect of antibiotic treatment on receptivity of uroepithelial cells to uropathogens";

c) Gregor REID--Jacqueline A. McGROARTY--Rosanne ANGOTTI and Roger L. COOK: "Lactobacillus inhibitor production against "Escherichia coli" and coaggregation ability with uropathogens".

It has now been found that the use of particular strains of Lactobacillus, isolated from the vaginal habitat, taxonomically characterized and selected by means of "in vitro" activity tests, allow to obtain particularly favourable therapeutic results, thanks to:

(a) their high affinity towards the vaginal epithelium allowing their implant on the vaginal mucosa both in physiological and in pathological conditions, restoring therefore the optimal microflora and pH conditions;

(b) their direct action on the pathogenic microorganism, apparently not due to the production of diffusible inhibitory substances but to a coaggregation with the phatogenic microorganism.

Of course, the validity of the invention should not be considered to be connected with the verification of the above suggested mechanism of action.

The pharmaceutical compositions of the invention are particularly useful for the treatment of vaginal and urological infections of mycotic and bacterial origin.

The strains were deposited at the Collection National de Cultures de Microorganisms (CNCM) of Institut Pasteur--Paris (France) on Jul. 21, 1988;

The identity and deposit numbers of the strains of the invention is hereinbelow reported.

______________________________________LACTOBACILLUS CASEI I-785LACTOBACILLUS GASSERI I-786LACTOBACILLUS FERMENTUM I-789LACTOBACILLUS CASEI I-790SUBSP.PSEUDOPLANTARUMLACTOBACILLUS CRISPATUS I-787LACTOBACILLUS FERMENTUM I-788______________________________________

Some information relevant to the characterisation of the strain of the invention are hereinbelow reported.

Lactobacillus Casei: I-785

Guanine+cytosine content (G+C %): 39.7%

Fermented sugars according to API CHL 5041 test

L-arabinose ribose galactose glucose fructose N-acetylglucosamine maltose melibiose sucrose melicitose raffinose gluconate 5-oxo-gluconate Plasmids: 1 plasmid 30M daltons Surface protein (S-layer): Molecular weight 56-66.000 daltons.

Lactobacillus gasseri: I-786

G+C %: 34.5

Fermented sugars according to API CHL 5041 test

galactose glucose fructose mannose N-acetylglucosamine amygdaline arlutine salicine cellobiose maltose sucrose trehalose gentiliose D tagatose Plasmids: 1 32M daltons Surface protein: two bands with Molecular weight=50.000 Hybridization with Lactobacillus gasseri DSM 20043:78%

Lactobacillus fermentum: I-789

G+C %: 51.2

Fermented sugar according to HPI CHL 5041 test

L-arabinose ribose galactose glucose fructose mannose maltose lactose melibiose sucrose raffinose gluconate 5-oxo-gluconate Hybridization with Lactobacillus fermentum ATCC 14932:100%

Lactobacillus casei supsp.Pseudoplantarum: I-790

G+C %: 46

Hybridization with ATCC 2558:92%

Lactobacillus crispatus: I-787

G+C %: 38

Hybridization with ATCC 33820:80%

Lactobacillus fermentum (LF4): I-788

G+C %: 52.2

Hybridization with ATCC 14931

The compositions of the invention may comprise one or more strains selected in the above defined group.

Particularly favourable therapeutic results were obtained with the following mixtures:

MIXTURE A 1

______________________________________Lactobacillus Casei I-785Lactobacillus Gasseri I-786Lactobacillus Fermentum I-789______________________________________

MIXTURE A 2

______________________________________Lactobacillus Casei subsp.Pseudoplantarum I-790Lactobacillus Crispatus I-787Lactobacillus Fermentum I-788______________________________________

Of course, other mixtures or single strains may be advantageously used in the compositions, comprised within the invention's scope.

A particularly preferred strain is Lactobacillus fermentum I-789, which proved to be endowed with a direct inhibitory action on some species of pathogenic fungi, particularly on Candida strains, as it has been shown by means of in vitro tests on agar plates whereupon Candida strain was contacted with Lactobacillus fermentum I-789. An inhibitory halo of Candida was noticed and a test carried out using the sterile surnatant of the I-789 culture instead of the whole cells shows that said inhibitory action is not due to inhibitory substances released in the culture medium.

For the practical use, the microorganisms of the invention are formulated in suitable administration forms such as ovules, creams, vaginal capsules, solutions for lavages, sachets and the like. Unit doses may comprise from 10.sup.3 to 10.sup.10 cells of each single strain, the preferred dosage being about 10.sup.6 cells per unit dose.

The bacterial cultures are preferably in lyophilized forms and may be prepared according to conventional methods.

For the preparation of aqueous formulations for lavages and irrigations small bottles are used, provided with resevoirs containing the lyophilized microorganisms, to be dissolved before use in a suitable liquid carrier contained in the bottles.

The compositions of the invention are practically devoid of any toxicity and show no systemic absorptions so as to allow the administration also to pregnant patients and in cases of intolerability to antimycotic or antibacterial drugs.

The compositions of the invention are therefore particularly useful, inter alia, for the prophylaxis of fungal infections due to antibiotic treatments and corresponding complications (formation of resistant strains, relapses etc.). The clinical experience up to now acquired shows as particularly convenient and effective a treatment schedule comprising the administration of the composition of the invention in form of capsules, creams or ovules to be administered before sleeping followed by a lavage on the subsequent morning.

The following non limitative examples further illustrate the compositions of the invention.

EXAMPLE 1

______________________________________OVULES______________________________________Active principle 1 .times. 10.sup.6 cells of each strainMixture A 1Excipient 2800 mgSemi-syntheticglycerides______________________________________

EXAMPLE 2

______________________________________VAGINAL CREAM (30 g tube)______________________________________Active principle 1 .times. 10.sup.6 cells of each strainLactobacillus fermentumI-789ExcipientHydrogenated lanoline 5 gVaseline oil 5 gDimethylpolysiloxane 10 gSiO.sub.2 (Aerosil 200 .RTM.) 15 gDodecylglycol 1,5 gpolyethylenglycol1000 copolymer 6 g______________________________________

EXAMPLE 3

______________________________________VAGINAL CAPSULES______________________________________Active principle 1 .times. 10.sup.6 cells of each strainMixture A 1ExcipientTriglycerides with C.sub.8 -C.sub.12 1500 mgfatty acids (Migliol .RTM.)Glycerine 2500 mgTitanium dioxide 10 mg______________________________________

EXAMPLE 4

______________________________________BOTTLES WITH RESERVOIREach bottle contains:______________________________________a) RESERVOIR 1 .times. 10.sup.6 cells of each strain Lyophilized mixture A 1b) BOTTLE (10 ml) Glycerine 4,0 g Water q.s. to 10 ml______________________________________

EXAMPLE 5

______________________________________SOLUTION FOR LAVAGESEach bottle with reservoir contains:______________________________________a) RESERVOIR 1 .times. 10.sup.3 cells of each strain Lyophilized mixture A 2b) BOTTLE (150 ml) Glycerine 60 g Water q.s. to 150 ml______________________________________

Claims

1. A strain of Lactobacillus, deposited at C.N.C.M. of Institute Pasteur and having the identity and deposit number of Lactobacillus fermentum I-789.

2. A pharmaceutical composition containing the Lactobacillus strain of claim 1.

3. A pharmaceutical composition according to claim 2 containing from 10.sup.3 to 10.sup.10 cells of the strain per unit dose.

4. A pharmaceutical composition according to claim 4 containing about 10.sup.6 cells of each strain per unit dose.

5. A pharmaceutical composition according to claim 2 in the form of creams, ovules, vaginal capsules, or solutions for lavages.