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  • In summary,Our candidate is Superior-to-Linezolid against MRSA, VRE, and H. Influenzae, in In vitro and in vivo. Additionally,safety profile was significantly improved than Linezolid.
  • The infectious Diseases Society of America proposed solutions in its 2004 policy report, “ Bad bugs no drugs : as antibiotic R&D stagnates, a public health crisis brews”The infectious Diseases Society of America identified a “hit list” of important pathogens based on two criteria :1. 1 current public health concern due to a high incidence of infection, substantial morbidity, high mortality, unique virvulence or resistance factors, or a combination of two or more of these characteristics.Second, few or no new antimicrobial candidate in the late-stage development pipeline The most important resistant pathogens are MRSA, VRE, PA, A. Baumannii, KP, E species. Treatment option in MRSA and VRE are Linezolid and daptomycin and in GNB sone beta lactam class antibioticsActually MRSA is the most important superbug so its drug is highly important and several pipeline is in clinical development. But in GNB pathogens, there’s no drug at all until now
  • Most compounds currently in development are derivatives of existing drugs with low potential to overcome resistances in the mid- to long term.All currently available drugs and late-stage candidates for MRSA treatment are injectables. With MRSA incidence rising in the community, oral drugs have a large commercial potential.Carbapenems and tigecycline are the only available treatment options for severe gram-negative infections. Upon emergence of resistances, novel drugs are a crucial need.
  • There are two kind of MRSA infections. The one is hospital associated and the other is community associated. Actually hospital associated infection is more important and 100,000 patients are infected and the motality is about 20%. Now it’s number of patients are more than AIDS infection patients.Until now, community associated infection is not so popular but the rate is highly increaed. So in the near future it will be serious problem in worldwide.
  • The adult dose of Linezolid is 600mg twice daily orally or intravenously for a maximum of 14 days.Thrombocytopenia is uncommon in patients who receive Linezolid for 14 days or less (the manufacturer's recommendation), but in patients who receive longer courses, or who have renal failure, the rate is much higher
  • mechanism of action of Linezolid is Inhibition of Mitochondrial Protein Synthesis .It is binding with 50S subunit of ribosome specially peptidyltransferase center. So protein synthesis was inhibited.Until 2007, it was unclear how to act the Linezolid. But now most of mechanism and some resistance mechanism were solved by X-ray crystallography.
  • Currently, only 3 oxazolidinones are in clinic stage. And the only one, torezolid is for MRSA target.This compound was developed by Dong-A pharmaceutical in Korea, but now they licence out to Triuspharmacetical. Torezolid is prodrug of TR-700.This compound showed good potency. Owing to it’s great potency, it can be once-a-day dosing is possible and reducing dose to 200 mg and shortened the treating days to only 5~7 day therapy. (usually Linezolid takes 2 weeks therapy) . According to shortened dosing quantity and period, it could be overcome the toxicity problems.
  • Pharmacia &Upjohn (now part of Pfizer) started its own oxazolidinone research program in the 1990. and most of big pharma has their own antibiotics program and lots compounds were tested in clinical stage but Until now only a few candidates have progressed beyond phase 1.These candidates were all discontinued now.
  • As mentioned before, The only oral MRSA drug is Linezolid, so next generation is urgently needed.The next generation drugs have to solve these problems.The first, improved potency. Linezolid is BID dosing, twice-a-day dosing is needed for it’s low potency, so next generation drug need high potency to enough to once-a-day dosing.The next is solubility, Linezolid is slightly soluble in water about 5 mg/mL, so only IV infusion is possible. If solubility is increased, it has some adventages.The next is expended spectrum. Linezolid acts only in gram-positive pathogen. If some gram negative pathogens such as H. influenzae & M. catarrhalis can be treated, it can be used much more indications. Actually it is very important in next generation drug.The next is covering Linezolid-resistant pathogens. But until now Linezolid resistance is not so serious and only a rare case were reported.The next is, myelosuppressive effects. It’s Bone marrow suppression, characterized particularly by thrombocytopenia (low platelet count ), It’s the most important toxicity in Linezolid. If we reduce the toxicity it can be used in the community.The last point MAO-I. Linezolid is a weak monoamine oxidase inhibitor (MAOI), and should not be used concomitantly with other MAOIs, large amounts of tyramine-rich foods (such as pork, aged cheeses, alcoholic beverages, or smoked and pickled foods), or serotonergic drugs. So it’s use in community is very limited.All these properties have to improved, so it’s really difficult to find a good next generation agent.
  • The last one is our company compound. It’s the only compound in pre-clinic stage except Pfizer compounds as promising candidate.We presented this at ICAAC meeting last year.Our initial lead was LCB01-0062, it showed great potency but showed bad PK profile and MAO-I profiles.So we cyclized the amidoxime to increase bioavailability.And this cyclic amidrazone moiety retain proper basicity, so it can make a salt and freely soluble in water.So we chose the LCB01-371 as preclinical candidate and it is currently under preclinical evaluations.
  • We improved synthetic scheme like this for process. In this scheme, only 7 steps and No column chromatography is needed and reasonable yields.
  • ADMET profiles are like this.The LCB-0371 showed comparable ADMET profiles with Linezolid. It showed no cytotoxicity, low protein binding, good metabolic stability, and improved MAO inhibition profiles.Plasma protein binding of LCB-0371 is relatively higher in mouse than human, so we expect the clinical efficacy will be improved than in mouse model efficacy.
  • The LCB-0371 showed comparable AUC and bioavailability.
  • The in vivo efficacies are tested four kind of animal model with mice.First animal model is systemic infection model.In systemic infection model, the LCB01-0371 showed 1.5~4 times more potent than Linezolid.Interestingly, it showed similarMIC but more potent in in vivo efficacy against E. faecalisand 2 times more potent in MIC but 4 times more potent inin vivo efficacy against S. pneumoniae.
  • LCB01-0371 was tested in another animal model, soft tissue infection model using air pouch.In this model, colony forming unit (CFU) was recorded after treatment with oral gavage.After 1 day, LCB01-0371 showed 3 times (25 mpk) ~ 20 times (50 mpk) reduction in CFU than Linezolid.
  • The 3rd animal model is lung infection model.After infection, treated 4 times oral gavage and recorded survival rates.LCB01-0371 showed higher survival rates than Linezolid.
  • The last animal model is thigh infection model.After infection, treated 3 times oral gavage and recorded the CFU.After 2 day, LCB01-0371 showed significantly reduced in CFU than Linezolid at all doses.
  • In Linezolid, one of the most serious side effect is bone marrow tox (thrombocytopenia). To evaluate the bone marrow tox, reduction % of reticulocyte was counted.In mice, LCB01-0371 showed less reduction % of reticulocyte, which means more safe than Linezolid and TR-701(Torezolid) compounds.
  • In rats, LCB01-0371 showed less reduction of reticulocytes than Linezolid and TR compound for 7 day study.
  • In TK study, 371 showed dose dependency and no accumulation.
  • Pre-clinical study of 4 weeks repeated tox in dogs, LCB01-0371 showed no accumulations.
  • Pre-clinical study is in progress at MPI (MI, USA) and will be finished within 1 month.
  • The LCB-0371 showed comparable AUC and bioavailability.
  • Currently we are preparing the Phase 1 study.

Project ppt antibiotic Project ppt antibiotic Presentation Transcript

  • Cephalosporins& Oxazolidinones
    Novel Antibiotic Small Molecules
    Prepared on April 2011
    Please contact LCB for
    more recent updated version
    1
  • 2
    Cephalosporin Program
  • 3
    K.pneumoniae
  • 4
    K. pneumoniae(4 ug/ml Tazobactam)
  • 5
    E. coli
  • 6
    E. coli (+ 4 ug/ml Tazobactam)
  • 7
    E. cloacae
  • 8
    E. cloacae (+ 4 ug/ml Tazobactam)
  • 9
    P. aeruginosa CXA-S
  • 10
    P. aeruginosa CXA-S (+ 4 ug/ml Tazobactam)
  • 11
    P. aeruginosa CXA-R
  • 12
    P. aeruginosa CXA-R (+ 4 ug/ml Tazobactam)
  • 13
    S. aureus
  • 14
    various species
  • 15
  • LCB oxazolidinones programS. aureus
    16
    VenatoRx
  • LCB oxazolidinones programVarious species
    17
    VenatoRx
  • Executive Summary
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    SUMMARY
    Opportunity Type: Small Molecule
    Therapeutic Area : Infectious disease, Antibacterials
    Target : Gram+ (MRSA, VRE, S. pneumoniae)
    Stage : Pre-clinical
    Latest Data : Pre-clinical
    Objective : License-out / Co-development
    2
    Novel oxazolidinone analogues were developed and they showed substantiallyimproved potency and safety features thanLinezolid. LCB01-0371 possesses overalladvanced potency, safety, and PK/PD data in vitroand in various in vivo and ex vivo experiments.
  • What is LCB01-0371?
    A novel oxazolidinone analogue.
    Potency
    in vitro: Superior to Linezolid against MRSA, VRE, and H. Influenzae.
    in vivo: 1.5~5 times superior to Linezolid.
    In vitro ADME/T
    Good metabolic profile, low drug-drug interaction, and high plasma stability.
    Safety
    Myelosuppression : Comparable or less bone marrow toxicity than Linezolid.
    MAO inhibition : Significantly better than Linezolid.
    NOAEL : 10~20 mpk (4 weeks, Dog)
    hERG assay & Ames test : Proved to be safe
    Solubility
    Freely soluble in salt form (>25%, Linezolid: 0.3 % in water)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    SUMMARY
    19
  • 2004 IDSA Report
    Most important resistant bacterial pathogens
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    Current treatment
    Current treatment
    Gram-negative
    Gram-positive
    Vancomycin,Linezolid, Daptomycin, Pristinamycin
    MRSA
    MDR-GNB
    Cephalosporins,
    Carbapenems, Aminoglycosides, Tigecycline
    P. aeruginosa,
    Acinetobacter,
    ESBL-producing
    Enterobacteriaceae
    Linezolid, Daptomycin
    VRE
    *IDSA : The Infectious Diseases Society of America
    Datamonitor commercial insight antibacterials 12/2006
    20
  • Unmet Needs in Antibiotics
    1. Most compounds currently in development are derivatives of existing drugs with low potential to overcome resistance in the mid to long term.
    2. All currently available drugs and late-stage candidates for MRSA treatment are injectables. With MRSA incidence rising in the community, oral drugs have a large commercial potential.
    3. Carbapenems and tigecycline are the only available treatment options for severe gram-negative infections. Upon emergence of resistances, novel drugs are a crucial need.
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    1. Compounds
    outside previous
    drug classes
    BACKGROUND
    Unmet needs
    3. Gram-
    negative
    resistance
    2. Oral
    MRSA
    drugs
    21
  • HA-MRSA and CA-MRSA
    Hospital-associated infection
    The burden of invasive (bloodstream) MRSA disease in the U.S. was evaluated using population-based, active case finding (at 9 sites) for the first time.
    The authors estimated there were 94,360 invasive MRSA infections in the U.S. in 2005 with 18,650 of them ending in death.
    Kievens, R. M. et al. JAMA 2007, 298, 1763-1771
    Community-associated infections
    MRSA was the most common cause of kin and soft-tissue infections in patients presented to emergency department in 11 U.S. cities studies.
    Incidence of MRSA infections in patients at 33 U.S. children’s hospitals increased ~300% from 2002 to 2007 while incidence of MSSA was stable
    Gerber, J. S. et al. Clin Infect Dis 2009, 49, 65-71
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    22
  • Market growth of MRSA Drugs
    7
    6
    5
    4
    3
    Global sales (US$ billion)
    2
    1
    0
    2005
    2006
    2007
    2008
    2009
    2010
    2011
    2012
    2013
    2014
    2015
    Pipeline drugs+
    Vancomycin
    Cubicin
    Tygacil
    Zyvox
    Datamonitor forecast* for drugs mainly indicated for treatment of infections caused by MRSA
    Global forecast* until 2015
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    Zyvox(Linezolid)
    • Oxazolidinone marketed by Pfizer
    • Indications include adult treatment of HAP (MRSA), CAP (S. pneumoniae), complicated and uncomplicated skin infections (MRSA), and VRE infections
    • Oral and IV formulations enable smooth transition from hospital to home treatment
    MRSA drugs are a main source of overall antibacterial market growth
    23
  • ZyvoxTM - From nichebuster to blockbuster
    2012-2015
    CAGR: -14.7%
    Sales decline following 7MM patent expiry (US: 2013).
    2002-2007
    CAGR: 43.8%
    Strong growth after launch in 2000 due to increasing incidence of MRSA and lack of competitors.
    2007-2012
    CAGR: 9.8%
    Growth rate diminishes as a consequence of emerging resistances and several competitors entering the market from 2007 onwards.
    30
    2,000
    1,800
    25
    1,600
    1,400
    20
    Sales
    1,200
    Volume use
    Sales (US$m)
    15
    1,000
    Volume use (SU m)
    800
    10
    600
    400
    5
    200
    0
    0
    2002
    2003
    2004
    2005
    2006
    2007
    2008
    2009
    2010
    2011
    2012
    2013
    2014
    2015
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    24
  • ZyvoxTM - Adverse Event Reports I
    All cases (305)
    Platelet Count Decreased (44),  Thrombocytopenia (31),  Death (26),  Anaemia (23),  Multi-Organ Failure (14),  Pyrexia (13),  Sepsis (13),  Vomiting (11),  Convulsion (11),  Respiratory Failure (10)
    Cases resulting in a serious event (296)
    Platelet Count Decreased (42),  Thrombocytopenia (30),  Death (26),  Anaemia (23),  Multi-Organ Failure (14),  Pyrexia (13),  Sepsis (13),  Vomiting (11),  Convulsion (11),  Respiratory Failure (10)
    Cases resulting in death (103)
    Platelet Count Decreased (29),  Multi-Organ Failure (13),  Sepsis (12),  Thrombocytopenia (12),  Respiratory Failure (10),  Pneumonia (8),  Septic Shock (7),  Renal Failure Acute (6),  Disseminated Intravascular Coagulation (5)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    25
  • ZyvoxTM - Adverse Event Reports II
    In one case, Linezolid was successfully restarted at a reduced dose after resolution of myelotoxicity. Thrombocytopenia (platelets less than 100,000/mm3) has been reported in 32% of patients (n=19) receiving Linezolid for more than 10 days.
    In another study (n=295), thrombocytopenia (platelets less than150 x 10(9)/L) occurred in 6.4% of patients and severe thrombocytopenia (platelets less than 50 x 10(9)/L) occurred in 0.3% receiving Linezolid for more than 5 days. It has been suggested that the mechanism of Linezolid-associated thrombocytopenia is immune-mediated.
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    26
  • Linezolid : First-in-class Oxazolidinone I
    Effectiveness and safety in the treatment of G-positive bacteria infection (9studies with a total 2498 patients)
    Treatment success : No difference was observed between Lzd and Vancomycin
    Linezolid was more effective than Vancomycin in skin and soft-tissue infections
    No difference in treatment success for patients with bacterimia or pneumonia
    MRSA-cSSTI (Complicatedskin and soft-tissue infection) (5studies with a total 2652 patients (Linezolid : 1361, Vancomycin : 1291))
    Microbiologicaleradication : favored the use of Linezolid over vancomycin.
    Mortality : No difference was observed
    Higher proportions of Linezolid Side-effect Diarrhea(119/1361 vs. 52/1291), nausea (102/1361 vs. 46/1291), thrombocytopenia (54/1121 vs. 8/1071)
    Higher proportions of Vancomycin Side-effect : Renal insufficiency(16/634 vs. 4/703)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    27
  • Linezolid : First-in-class Oxazolidinone II
    Linezolid is as effective as vancomycin in patients with gram-positive infection
    Linezolid is more likely to consistently achieve microbiologic eradication in MRSA
    Apparent risks of thrombocytopenia, nausea, diarrhea, and possibly anemia may limit Linezolid use in treating MRSA cSSTI
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    28
  • Linezolid : First-in-class Oxazolidinone III
    First member of a new class of antibacterial agents to be approved (2000) in over 35 years
    FDA Approved Indications
    Vancomycin-resistant Enterococcusfaecium infections, * including cases with concurrent bacteremia
    Nosocomial pneumonia caused by:
    Staphylococcus aureus (MSSA & MRSA*)
    Streptococcus pneumoniae(penicillin-susceptible & MDRSP)
    Complicated skin and skin-structure infections, including diabetic foot infections, without concomitant osteomyelitis, caused by:
    Staphylococcus aureus (MSSA & MRSA*)
    Streptococcus pyogenes
    Streptococcus agalactiae
    Uncomplicated skin and skin-structure infections
    Community-acquired pneumonia
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    BACKGROUND
    * Only oral medicine approved by FDA for treatment of infections due to these organisms
    29
  • Linezolid : Mechanism of Action
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    Inhibition of Mitochondrial Protein Synthesis
    BACKGROUND
    Leach et al. Molecular Cell 2007, 26, 393-402
    30
  • Clinical Stage: TOREZOLIDTM
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    Trius Therapeutics
    Licensed from Dong-A pharmaceutical in Korea
    Trial data and PK/PD support 200mg QD as lowest effective dose for selection in Phase III pivotal cSSSI studies
    COMPETITION
    31
  • Clinical Stage: RADEZOLIDTM
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    Radezolid is significantly more potent than LZD against S. pneumoniae, the enterococci, and respiratory tract pathogens (including H. influenzae)
    Radezolid is comparable or better than LZD in animal infection models
    Radezolid was well tolerated in Phase I studies
    Phase II trial of Radezolid in CAP recently concluded
    RDZ at 300mg QD was comparable to 450mg QD or BID (Rib-X press release, Aug 4, 2009)
    COMPETITION
    32
  • Clinical Stage: PNU-100480
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    PNU-100480 is Pfizer’s early oxazolidione with efficacy superior to LZD in murine TB models
    Despite similar MICs, LZD is static while PNU-100480 is cidal at human-equivalent doses
    Sulfoxide metabolite comprises 84% of the composite AUC (in mice)
    In mice, PNU-100480 conferred an additional 2-log reduction in lung CFU counts when added to RIF-INH-PZA
    Phase I trial to assess safety, tolerability, and PK began in May 2009
    COMPETITION
    33
  • Pre-Clinical Stage Candidates
    Novel ‘reverse amide’ C-5 side chain analog
    Excellent PK profile in rats and dogs.
    Reduced potential for MAO-A inhibition (Ki=546uM vs. 56uM for Linezolid)
    NOAEL of 200mg/kg/day in 2 week rat study
    Vicuron-Pfizer collaboration
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    COMPETITION
    34
  • Discontinued Oxazolidinones
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    COMPETITION
    35
  • Next-Generation Opportunities
    Improved potency to enable lower dose; Once-daily dosing
    Better water solubility to reduce volume for IV administration
    Expanded spectrum to encompass more indications
    E.g. coverage of H. influenzae& M. catarrhalis
    Coverage of Linezolid-resistant organisms
    Reduced or eliminate reversible myelosuppressive effects
    For use in the community and for longer-term therapy (e.g., osteomyelitis, etc.)
    Need a better understanding of binding vs. mitichondrialribosomes
    Improved MAOi profile desirable for broad community use
    36
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    COMPETITION
  • Novel Scaffold
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    DEVELOPMENT
    37
  • Chemical properties
    Among oxazolidinone analogs, LCB01-0371 has the lowest Molecular Weight of (C14H17FN4O3) 308.3 (Linezolid : 337)
    Chemical Stability (stressed condition) : Stable up to 3 months in 60℃, 75% humidity condition (>98% remaining)
    Aqueous Solubility : HCl salt form is freely soluble in water
    Hygroscopicity of LCB01-0371 : Weight change was < 0.3% for a week
    pKa estimation of LCB01-0371-HCl salt : Estimated pKa ~ 4.3 (Calculated value : pKa = 5.0). Acetic acid: pKa = 4.76
    Synthesis : 7 steps overall yield was 39% (without column chromatography)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    DEVELOPMENT
    38
  • Synthetic Scheme Process
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    DEVELOPMENT
    39
  • In vitro ADME-T and PK profiles
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    Mouse PPB is relatively higher than human PPB
    IN VITRO
    Clinical efficacy will be improved than mouse model efficacy
    40
  • MICs of Clinical Isolates
    l
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    IN VITRO
    41
  • Pharmacokinetic Profiles
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    42
    LCB01-0371
    LCB01-0371
    LCB01-0371
    Linezolid
    Linezolid
    (mg*h/L)
    (mg*h/L)
    (mg/L)
    (kg/L)
    (h)
    IN VIVO
    (h)
    (%)
  • In vivo : 1. Systemic Infection Model in Mice
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    43
    2
    1
    (2.69~7.22)
    (4.93~10.1)
    (PO)
    (PO)
    0
    (PO)
    IN VIVO
    LCB01-0371 showed 1.5~4 times more potent than Linezolid
    E. faecalis : similar MIC but more potent in in vivo
    S. pneumoniae : 2 times more potent in MIC but 4 times more potent in in vivo
    Considering PPB, efficacy could be more improved in clinical study than in mouse study
  • In Vivo : 2. Soft Tissue Infection Model (air pouch)
    • Infection : S. aureusgiorgio (MSSA)
    • Oral treatment(once) and then CFU counted after 1 day
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    IN VIVO
    LCB01-0371 showed 3 times (25 mpk) ~ 20 times (50 mpk) reduction in CFU thanLinezolid
    44
  • In Vivo : 3. Lung Infection Model
    • Infection pathogen: S. pneumoniae ATCC6305 (1X107)
    • Treatment : PO, 4 times (1 hr, 4 hr, 24 hr, 48 hr)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    IN VIVO
    45
  • In Vivo : 4. Thigh Infection Model
    • Infection : S. aureusgiorgio (MSSA)
    • Treatment : PO, 3 times (1 hr, 4 hr, 24 hr)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    Linezolid(12.5 mpk)
    Linezolid(25 mpk)
    LCB01-0371
    (12.5 mpk, 25 mpk)
    Treatment: 1, 4, 24 hr post infection
    IN VIVO
    LCB01-0371 showed significant reduction in CFU thanLinezolid
    46
  • Toxicology: 1. Mice (4-days)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    IN VIVO
    Linezolid
    TR-700
    LCB01-0371
    TR-701
    • Compounds were orally administered for 4 days (QD) to female C3H mice.
    • Blood samples weredrawn at day 5 and analyzed.
    • % reticulocyte was determined.
    • Reference - Therapy, 2006, 3(4), 521-526
    47
  • Toxicology: 2. Rats (7-days)
    • Compounds were orally administered for 7 days to male SD rats.
    • Blood samples weredrawn at day 8 and analyzed.
    • % reticulocyte was determined.
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    IN VIVO
    Linezolid(bid)
    TR-701 (qd)
    LCB01-0371 (bid)
    48
  • Toxicology: 3. Rats (14-day)
    No toxic sign was seen in 2 weeks repeated dose.
    Compared to linezolid, 0371 showed reduced myelosuppression as measured by reticulocyte counts.
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
    Patents
    Company
    100mpk
    200mpk
    100mpk
    200mpk
    vehicle
    Linezolid
    LCB01-0371
    IN VIVO
    100mpk
    200mpk
    100mpk
    200mpk
    vehicle
    Linezolid
    LCB01-0371
    49
  • Toxicology: 4. TK in Rats (7-day)
    Summary
    Background
    Competition
    Development
    In Vitro
    In vivo
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    Dose dependency without accumulation was observed
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  • Toxicology: 5. TK in Dogs (4-weeks)
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    Lower AUC
    higher Cmax
    thanLinezolid
    (lower NOAEL)
    No accumulation was observed
    IN VIVO
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  • Pre-clinical Study Summary
    MTD in Rat : 2000 mpk
    Two-weeks DRF in Rats : MTD 100 mpk
    Four-weeks repeated dose toxicity in Dogs
    Male : NOAEL 20 mpk
    Female : NOAEL 10 mpk
    Four-weeks repeated dose toxicity in Rats : will be completed in July 2010 (GLP)
    NOAEL (Non-GLP) : 50 mpk (male, female)
    hERG binding assay : low inhibition at 0.1~100 uM
    Ames test : Negative
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  • Head-to-Head Comparison Pharmacokinetic Profiles
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  • In Progress and Future Plan
    Pre-clinical study
    4-weeks repeated dose toxicity in dogs : Completed in March 2010 and waiting for the report
    4-weeks repeated dose toxicity in rats : started in June 2010
    Safety pharmacology : will be finished in August 2010
    IND filing and preparing Phase I
    Back-up program
    Discovering more potent and more safe candidates
    Application to MDR-TB
    In vivo study with lead compounds
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  • Patents
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  • Claimed Chemical Structures
    Each independent claim is followed by dependent Markush claim.
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  • Company Profile
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    Established in May 2006 (Daeduk Science Town, Daejeon, Korea).
    Raised 10 million US$ since inception.
    Retains 20+ novel scaffolds thus called “Lego blocks” and able to design novel drugs.
    Has built sustainable pipelines in the therapeutic areas of antibiotics, anticoagulants, oncology.
    Experienced and seasoned executive and scientific management team mostly from LG Life Science.
    COMPANY
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  • Contact
    COMPANY: LegoChem Biosciences, Inc.
    Daejeon Bio Venture Town
    461-8 Jeonmin-dong, Yuseong-gu
    Daejeon, 305-811, South Korea
    http://www.legochembio.com/
    CONTACT: Sung-Ho Woo, Ph.D.
    Biology Director & Senior VP
    [Tel] +82-42-861-0688
    [Fax] +82-42-861-0689
    E-mail: sungwoo@legochembio.com
    Request for More Materials
    ONE PAGE: One page snapshot of proposal.
    5MIN VIDEO: Easy to view & understand video proposal.
    COMPANY DOC: A comprehensive overview of company information in written format.
    COMPANY PPT: A comprehensive overview of company information in presentation format.
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    Summary
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    COMPANY