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US20080103157A1 - Methods for treating depression, neurodegeneration, inhibiting amyloid beta deposition, delaying senescence, and extending life spans with heterocyclic compounds - Google Patents

Methods for treating depression, neurodegeneration, inhibiting amyloid beta deposition, delaying senescence, and extending life spans with heterocyclic compounds Download PDF

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Publication number
US20080103157A1
US20080103157A1 US11/872,408 US87240807A US2008103157A1 US 20080103157 A1 US20080103157 A1 US 20080103157A1 US 87240807 A US87240807 A US 87240807A US 2008103157 A1 US2008103157 A1 US 2008103157A1
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group
general formula
pyridin
compound
spiro
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Inventor
Yoshimasa Yamaguchi
Ryogo Yui
Toshiyuki Matsuno
Kenichi Saitoh
Hitoshi Miyashita
Takeshi Nagata
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Zenyaku Kogyo KK
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Zenyaku Kogyo KK
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Assigned to ZENYAKU KOGYO KABUSHIKI KAISHA reassignment ZENYAKU KOGYO KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATSUNO, TOSHIYUKI, MIYASHITA, HITOSHI, NAGATA, TAKESHI, SAITOH, KENICHI, YAMAGUCHI, YOSHIMASA, YUI, RYOGO
Publication of US20080103157A1 publication Critical patent/US20080103157A1/en
Priority to US14/178,425 priority Critical patent/US9089561B2/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
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    • A61K31/33—Heterocyclic compounds
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    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
    • A61K31/4353—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems
    • A61K31/437—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a five-membered ring having nitrogen as a ring hetero atom, e.g. indolizine, beta-carboline
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    • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
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    • A61K31/4427—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems
    • A61K31/444—Non condensed pyridines; Hydrogenated derivatives thereof containing further heterocyclic ring systems containing a six-membered ring with nitrogen as a ring heteroatom, e.g. amrinone
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    • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
    • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
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    • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
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    • C07D513/20—Spiro-condensed systems

Definitions

  • the present invention is in the filed of medicinal chemistry and relates to an antidepressant, neuroprotectant, amyloid ⁇ deposition inhibitor, or age retardant composition comprising containing a heterocyclic compound having a specific structure.
  • SSRI serotonin reuptake inhibitors
  • Antioxidative substances reportedly have antiaging activity.
  • oolong tea containing antioxidants is considered to have antiaging activity ( Biol Pharm Bull Vol 26 No 5 739-742 2003).
  • deprenyl reportedly increases the survival rate and is used as a monoamine oxidase B inhibitor in treatment for Parkinson's disease, this has been confirmed to be due to its antioxidant activity ( Mech Ageing Dev Vol 46 No 1-3 237-262 1988).
  • these substances do not offer antiaging activity and increase in the survival rate of animals at satisfactory levels.
  • Edaravone is a free radical scavenger having antioxidative activity and used as a neuroprotectant. However, it is not highly effective and various side effects including kidney failure have been reported (The Japan Stroke Society: Clinical Guideline for Stroke (2004), 42-43.).
  • Curcumin is a component of Curcuma longa contained in curry in a large amount and has antiinflammatory and antioxidative activity equivalent to prescribed nonsteroidal antiinflammatory drugs (NSAIDs). Studies have shown that curcumin inhibits amyloid-related pathologies ( Pharmacia , Japanese Pharmacology Association, Vol. 38, No. 9, 891-892, 2002.). However, curcumin does not inhibit p amyloid deposition at satisfactory levels.
  • NSAIDs nonsteroidal antiinflammatory drugs
  • the present invention provides an antidepressant, neuroprotectant, amyloid p deposition inhibitor, or age retardant containing a heterocyclic compound having the general Formula (I): or a pharmaceutically acceptable salt or hydrate thereof.
  • the structural unit having the general formula (II) is one or more structural units selected from multiple types of structural units having the general Formula (III).
  • R 1 and R 2 each are one or more functional groups independently selected from the group consisting of a hydrogen atom, halogen atom, hydroxy group, amino group, acetylamino group, benzylamino group, trifluoromethyl group, C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group, and —O—(CH 2 )n-R 5 , wherein R 5 is a vinyl group, C 3 -C 6 cycloalkyl group, or phenyl group, and n is 0 or 1.
  • R 3 and R 4 each are one or more functional groups independently selected from the group consisting of a hydrogen atom, C 1 -C 6 alkyl group, C 3 -C 8 cycloalkyl group, and —CH(R 7 )—R 6 ; alternatively, R 3 and R 4 together form a spiro ring having the general Formula (IV):
  • R 6 is one or more functional groups selected from the group consisting of a vinyl group; ethinyl group; phenyl optionally substituted by a C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group, hydroxy group, 1 or 2 halogen atoms, di C 1 -C 6 alkylamino group, cyano group, nitro group, carboxy group, or phenyl group; phenethyl group; pyridyl group; thienyl group; and furyl group.
  • the above R 7 is a hydrogen atom or C 1 -C 6 alkyl group.
  • the structural unit B is one or more structural units selected from multiple types of structural units having the general Formula (V).
  • the structural unit B binds at a position marked by * in the general Formula (V) to form a spiro ring.
  • R 8 is one or more functional groups selected from the group consisting of a hydrogen atom, halogen atom, hydroxy group, C 1 -C 6 alkoxy group, cyano group, and trifluoromethyl group.
  • the compounds of Formula (I) may be used as an antidepressant, neuroprotectant, amyloid ⁇ deposition inhibitor, delayer of senescence, as an age retardant and extender of life spans of animals.
  • the invention relates in particular to a method of treating or preventing depression, manic depressive psychoses, obsessive-compulsive disorder, panic disorder, or anxiety disorder in a mammal in need thereof, comprising administering to the mammal an effective amount of a heterocyclic compound having the general Formula (I), or a pharmaceutically acceptable salt or hydrate thereof.
  • the invention also relates to a method of reducing or preventing neurodegeneration in a mammal in need thereof, comprising administering to the mammal an effective amount of a compound having the general Formula (I), or a pharmaceutically acceptable salt thereof.
  • the neurodegeneration is the result of one or more cerebrovascular disorders selected from the group consisting of transient ischemic attack, cerebral hemorrhage, subarachnoid hemorrhage, intracranial hemorrhage, cerebral infarct, and/or hypertensive encephalopathy.
  • the invention also relates to a method of inhibiting amyloid deposition in an mammal in need thereof, comprising administering to the mammal an effective amount of a compound having the general Formula (I).
  • the amyloid deposition is the result of or associated with one or more amyloid-related pathologies selected from amyloidosis, cerebral amyloid angiopathy, cataract, glaucoma, the progression of glaucoma, age-related macular degeneration, rheumatism, osteoporosis, metabolic syndrome, wrinkles, and hair loss.
  • the invention also relates to a method of delaying senescence is an animal in need thereof, comprising administering to the animal an effective amount of a heterocyclic compound having the general Formula (I).
  • the invention provides an improvement and/or delay in worstening symptoms of one or more conditions associated with senescence, including reactivity, passivity, glossiness and/or coarseness of hair, hair loss, ulcers, periophthalmic lesions, cataracts, corneal opacity and/or lordokyphosis.
  • the invention also relates to a method of extending the life span of a mammal in need thereof, comprising administering to the mammal an effective amount of a compound having the general Formula (I).
  • FIG. 1 is a graphical representation for explaining the hippocampus CA1 region protective activity of Compound 24 in the gerbil transient forebrain ischemia model.
  • FIG. 2 contains photographs for explaining the neuroprotective activity in delayed neuronal death in the hippocampus CA1 region in the gerbil transient forebrain ischemia model.
  • FIG. 3 contains photographs for explaining the effect of Compound 24 on the number of amyloid ⁇ -immunoreactive cells in senescene accelerated mice (SAMP8).
  • FIG. 4 depicts a graphical representation for explaining the effect of Compound 24 on the number of amyloid ⁇ -immunoreactive cells in senescene accelerated mice (SAMP8).
  • FIG. 5 depicts a graphical representation for explaining the effect of Compound 24 on the grading scores in senescene accelerated mice (SAMP8).
  • FIG. 6 depicts a graphical representation for explaining the effect of Compound 24 on the survival rate of senescene accelerated mice (SAMP8).
  • Embodiments of the present invention are described hereafter. Embodiments below relate to an antidepressant, neuroprotectant, amyloid ⁇ deposition inhibitor, or age retardant composition containing a heterocyclic compound having the above described specific structure (azaindolizinone derivatives) and pharmaceutically acceptable carriers or diluents.
  • the compounds useful in the present invention all contain a heterocyclic compound having the general Formula (I): or a pharmaceutically acceptable salt or hydrate thereof.
  • the structural unit having the general Formula (II) is one or more structural units selected from multiple types of structural units having the general Formula (III).
  • R 1 and R 2 each are one or more functional groups independently selected from the group consisting of a hydrogen atom, halogen atom, hydroxy group, amino group, acetylamino group, benzylamino group, trifluoromethyl group, C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group, and —O—(CH 2 )n-R 5 , wherein R 5 is a vinyl group, C 3 -C 6 cycloalkyl group, or phenyl group, and n is 0 or 1.
  • R 3 and R 4 each are one or more functional groups independently selected from the group consisting of a hydrogen atom, C 1 -C 6 alkyl group, C 3 -C 8 cycloalkyl group, and —C H(R 7 )—R 8 ; alternatively, R 3 and R 4 together form a spiro ring having the general formula (IV):
  • R 6 is one or more functional groups selected from the group consisting of a vinyl group; ethinyl group; phenyl optionally substituted by a C 1 -C 6 alkyl group, C 1 -C 6 alkoxy group, hydroxy group, 1 or 2 halogen atoms, di C 1 -C 6 alkylamino group, cyano group, nitro group, carboxy group, or phenyl group), phenethyl group, pyridyl group, thienyl group, and furyl group.
  • R 7 is a hydrogen atom or C 1 -C 6 alkyl group.
  • the structural unit B is one or more structural units selected from multiple types of structural units having the general Formula (V).
  • the structural unit B binds at a position marked by * in the general Formula (V) to form a spiro ring.
  • R 8 is one or more functional groups selected from the group consisting of a hydrogen atom, halogen atom, hydroxy group, C 1 -C 6 alkoxy group, cyano group, and trifluoromethyl group.
  • heterocyclic compound having the general Formula (I) has asymmetric carbon atoms in the structure, its isomer from asymmetric carbon atoms and their mixture (racemic modification) is present. In such cases, all of them are included in the heterocyclic compound used in the embodiments described later.
  • the heterocyclic compound has the general Formula (I).
  • the following terms have the meanings specified below along with their examples.
  • C 1 -C 6 refers to 1 to 6 carbon atoms unless otherwise defined.
  • C 3 -C 8 refers to 3 to 8 carbon atoms unless otherwise defined.
  • C 1 -C 6 alkyl includes linear or branched alkyl groups such as methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, sec-butyl, n-pentyl, and n-hexyl.
  • C 1 -C 6 alkoxy includes linear or branched alkoxy groups such as methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, tert-butoxy, sec-butoxy, n-pentyloxy, and n-hexyloxy.
  • C 3 -C 8 cycloalkyl includes cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl.
  • halogen atom includes fluorine, chlorine, bromine, and iodine.
  • heterocyclic compound useful in the practice of the present invention is not particularly restricted as long as it has the above described specific structure.
  • the following compounds can be used.
  • the heterocyclic compound of Formula (I) can be in the form of hydrate or acid addition salts as a pharmaceutically acceptable salt.
  • Possible acid addition salts include inorganic acid salts such as the hydrochloride, sulfate, hydrobromide, nitrate, and phosphate salts and organic acid salts such as acetate, oxalate, propionate, glycolate, lactate, pyruvate, malonate, succinate, maleate, fumarate, malate, tartrate, citrate, benzoate, cinnamate, methanesulfonate, benzenesulfonate, p-toluenesulfonate, and salicylate salts.
  • the administration method, formulation, and dosage of the heterocyclic compound in mammals, particularly in human, are described hereafter.
  • the heterocyclic compound can be administrated orally or parenterally.
  • Formulations for oral administration include tablets, coated tablets, powder, granules, capsules, microcapsules, and syrups.
  • Formulations for parenteral administration include injectable solutions (including those freeze-dried and dissolved for use), adhesive skin patches, and suppositories.
  • formulations can be prepared using pharmaceutically acceptable fillers, binders, lubricants, disintegrators, suspending agents, emulsifiers, antiseptic agents, stabilizing agents, and dispersing agents such as lactoses, saccharoses, starches, dextrines, crystalline celluloses, kaolins, calcium carbonate, talc, magnesium stearate, and distilled water or saline.
  • Particular pharmaceutically acceptable components include mannitol, microcrystalline cellulose, hydroxypropyl cellulose, and magnesium stearate.
  • the dosage varies according to the symptom, age, and body weight of patients. An adult can take 0.1 to 100 mg per day in one to three doses.
  • the invention provides an antidepressant composition comprising a compound of the general Formula (I).
  • heterocyclic compounds having Formula I exhibit antidepressant activity in forced swimming test and tail suspension test as described later in examples. Screening of the compounds for antidepressant activity showed thatazaindolizinone derivatives in which a dibenzyl group or an indan ring forms a spiro ring have potent antidepressant activity. These compounds exhibit antidepressant activity based on a novel mechanism that does not involve the inhibition of serotonin reuptake.
  • the compound spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan] has also been shown to be highly safe in a preclinical study.
  • the antidepressant of this embodiment exhibits excellent antidepressant effect. More specifically, the antidepressant of this embodiment inhibits one or more mood disorders selected from the group consisting of depression, manic depressive psychoses, obsessive-compulsive disorder, panic disorder, and anxiety disorder in mammals.
  • the heterocyclic compound contained in the antidepressant composition of this embodiment is preferably among the compounds below because these compounds have been shown to have excellent antidepressive activity in the mouse tail suspension test, which is a typical test for antidepressive activity of a compound in a mouse model.
  • the antidepressant compound may be administered by a means which acheives reduction or alleviation of depression in a mammal.
  • the antidepressant compound is orally administered.
  • the antidepressant is administered as part of an adhesive skin patch.
  • the antidepressant compound is formulated into tablets, coated tablets, powder, granules, capsules, microcapsules, and syrups. The antidepressant in the form of oral formulations is easily administered to mammals, including human beings.
  • the antidepressant compound may be administered at an effective oral dosage of 0.0005 mg per kilogram of body weight or higher, more preferably 0.005 mg per kilogram of body weight or higher, and particularly preferably 0.05 mg per kilogram of body weight or higher.
  • the compound is administered as part of a unitary pharmaceutical dosage form containing 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 mg.
  • the antidepressant compound is administered at an effective oral dosage of these lower limits or higher, the antidepressive activity in mammals including human beings is improved compared to when lower doses are administered.
  • the invention provides a neuroprotectant composition comprising a compound of Formula (I)
  • spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan] within Formula (I) exhibits neuroprotective activity in a study on reduction in delayed neuronal death in the hippocampus CA1 field in the gerbil transient forebrain ischemia model as described later in examples.
  • Screening of derivatives of the above compound for neuroprotective activity showed that azaindolizinone derivatives in which an indan ring forms a spiro ring have potent neuroprotective activity.
  • the above compound exhibits neuroprotective activity based on a novel mechanism different from antioxidization.
  • spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan] has also been shown to be highly safe in the preclinical study.
  • the neuroprotectant composition containing the compound of Formula (I), in particular, spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan], is effective at lower dosages based on a mechanism different from that of Edaravone, which is a neuroprotectant having antioxidative activity. Therefore, the neuroprotectant composition is expected to avoid various side effects such as kidney failure as reported for Edaravone.
  • the neuroprotectant composition of this embodiment exhibits excellent neuroprotective activity.
  • the composition inhibit one or more cerebrovascular disorders selected from the group consisting of transient ischemic attack, cerebral hemorrhage, subarachnoid hemorrhage, intracranial hemorrhage, cerebral infarct, and hypertensive encephalopathy in mammals.
  • the neuroprotectant compound of this embodiment is preferably spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan]. This compound was shown to have an excellent neuroprotective activity in a study on reduction in delayed neuronal death in the hippocampus CA1 region in the gerbil transient forebrain ischemia model, which is a typical animal model for neuroprotection, as described later in the examples.
  • the neuroprotectant compound may be administered by a means which provides neuroprotection in a mammal.
  • the neuroprotectant compound of this embodiment is orally administered.
  • the neuroprotectant compound can be administered as part of an adhesive skin patch.
  • the neuroprotectant compound may be formulated into tablets, coated tablets, powder, granules, capsules, microcapsules, and syrups. The neuroprotectant in the form of oral formulations is easily administered in mammals, including human beings.
  • the neuroprotectant compound may be administered at an effective oral dosage of 0.005 mg per kilogram body weight or higher, more preferably 0.05 mg per kilogram of body weight or higher, and particularly preferably 0.5 mg per kilogram of body weight or higher.
  • an effective oral dosage of these lower limits or higher the neuroprotective activity in mammals including human beings is improved compared to when lower doses are administered.
  • the invention provides an amyloid ⁇ deposition inhibitor composition comprising a compound having Formula (I).
  • a compound of Formula (I) in particular, spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan], exhibits inhibitory activity of amyloid ⁇ deposition in the hippocampus by amyloid ⁇ immunohistochemistry as described later in the examples.
  • Screening of derivatives of the compound for amyloid ⁇ deposition inhibitory activity showed that azaindolizinone derivatives in which an indan ring forms a spiro ring have potent amyloid ⁇ deposition inhibitory activity.
  • the above compound exhibits amyloid ⁇ deposition inhibitory activity based on a novel mechanism different from antioxidative activity.
  • the compound has also been shown to be highly safe in the preclinical study.
  • amyloid ⁇ deposition inhibitor of Formula (I) in particular, spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan], is effective at lower dosages based on a mechanism which is different from curcumin, a component of Curcuma longa contained in curry in a large amount and which has antioxidative activity. Therefore, it is a new amyloid ⁇ deposition inhibitor having a mechanism of action different from curcumin.
  • amyloid ⁇ deposition inhibitor of Formula (I) in particular, spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan], exhibits excellent inhibitory activity of amyloid ⁇ deposition. More specifically, the amyloid ⁇ deposition inhibitor of Formula (I) inhibits one or more amyloid-related pathologies selected from the group consisting of amyloidosis, cerebral amyloid angiopathy, cataract, glaucoma, the progression of glaucoma, age-related macular degeneration, rheumatism, osteoporosis, metabolic syndrome, wrinkles, and hair loss in mammals.
  • amyloid ⁇ deposition inhibitor of this embodiment is preferably spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan] as this compound was shown to have excellent inhibitory activity of amyloid ⁇ deposition in the hippocampus amyloid ⁇ immunohistochemistry, which is a typical animal model test for inhibitory activity of amyloid ⁇ deposition, as described later in the examples.
  • the amyloid ⁇ deposition inhibitor compound may be administered by any means which acheives reduction in amyloid ⁇ deposition in a mammal.
  • the amyloid ⁇ deposition inhibitor compound of this embodiment is orally administered.
  • the amyloid ⁇ deposition inhibitor compound may be administered as part of an adhesive skin patch.
  • the amyloid ⁇ deposition inhibitor compound may be formulated into tablets, coated tablets, powder, granules, capsules, microcapsules, and syrups, as the amyloid ⁇ deposition inhibitor in the form of oral formulations is easily administered in mammals, including human beings.
  • the amyloid ⁇ deposition inhibitor compound of this embodiment is preferably administered at an effective oral dosage of 0.0005 mg per kilogram of body weight or higher.
  • the compound is administered as part of a unitary pharmaceutical dosage form containing 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 mg.
  • the amyloid ⁇ deposition inhibitor is administered at an effective oral dosage of this lower limit or higher, the amyloid ⁇ deposition inhibitory activity in mammals including human beings is improved compared to when lower doses are administered.
  • the invention provides an age retardant composition comprising a compound of general Formula (I).
  • the invention also provides a composition comprising a compound of general Formula (I) for delaying senescence in an animal in need thereof, comprising administering to the animal an effective amount of a heterocyclic compound having the general Formula (I).
  • the composition comprising a compound of general Formula (I) improves and/or delays in worstening symptoms of one or more conditions associated with senescence, including reactivity, passivity, glossiness and/or coarseness of hair, hair loss, ulcers, periophthalmic lesions, cataracts, corneal opacity and lordokyphosis.
  • the invention provides the composition comprising a compound of general Formula (I) for extending the life span of a mammal in need thereof, comprising administering to the mammal an effective amount of a compound having the general Formula (I).
  • the compound of Formula (I) in particular, spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan], exhibits age retardant activity in measurement of grading scores in senescene accelerated mice as described later in the examples.
  • Screening of compounds for age retardant activity showed that azaindolizinone derivatives in which an indan ring forms a spiro ring have potent age retardant activity.
  • the above compound exhibits age retardant activity based on a novel mechanism which is different from an antioxidative activity.
  • Spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan] has also been shown to be highly safe in a preclinical study.
  • the age retardant compound of this embodiment is effective at lower dosages based on a mechanism which is different from oolong tea and deprenyl, both having antioxidative activity. Therefore, it is a new age retardant having a mechanism different from oolong tea and deprenyl.
  • the compound of Formula (I) can be used as an antiaging drug having a novel mechanism which is different from those drugs having antioxidative activity. It is expected that the compound of Formula (I) will have an age retardant activity with improved efficacy at lower dosages compared to oolong tea and deprenyl.
  • the age retardant compound of this embodiment exhibits excellent age retardant activity.
  • the age retardant compound of this embodiment slows down the aging process in mice and is expected to slow the aging process in other mammals including human beings.
  • the age retardant compound also extends the average life span in mice and is expected to extend the average life span in other mammals including human beings.
  • the age retardant compound of this embodiment is preferably spiro[imidazo[1,2-a]pyridin-2(3H)-one-3,2′-indan] as this compound was shown to have excellent age retardant activity in measurement of grading scores in senescene accelerated mice, which is an animal model for age retardant activity, as described later in examples. Furthermore, this compound was shown to extend the average life span in senescene accelerated mice as described later in examples.
  • the age retardant compound may be administered by any means which acheives delaying of scenescence in a mammal.
  • the age retardant compound of this embodiment is orally administered.
  • the age retardant compound can be administered as part of an adhesive skin patch.
  • the age retardant compound may be formulated into tablets, coated tablets, powder, granules, capsules, microcapsules, and syrups, as the age retardant compound in the form of oral formulations is easily administered to mammals, including human beings.
  • the age retardant compound of this embodiment is preferably administered at an effective oral dosage of 0.0005 mg per kilogram of body weight or higher, more preferably 0.005 mg per kilogram of body weight or higher, and particularly preferably 0.05 mg per kilogram of body weight or higher.
  • the compound is administered as part of a unitary pharmaceutical dosage form containing 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 mg.
  • the age retardant is administered at an effective oral dosage of these lower limits or higher, the age retardant activity in mammals including human beings is improved compared to when lower doses are administered.
  • the age retardant compound is preferably administered at an effective oral dosage of 0.005 mg per kilogram of body weight or higher for extended average life span.
  • the average life span is extended in mammals including human beings.
  • some preferable ranges of effective oral dosages are defined in the above embodiments. However, other ranges of effective dosages can be determined for other administration forms. For example, a preferable range of effective dosages for administration by injection can be determined as appropriate. Furthermore, preferable ranges of administration intervals can be determined for particular administration forms in addition to the effective dosages with no more than routine experimentation.
  • Gerbils male, weighing approximately 55 to 80 g were pinched with an exposured bilateral common carotid artery by microclip to cause the cerebral ischemia under 2% halothane inhalation anesthesia. After four minutes of ischemia, the microclip was removed to reperfuse the cerebral ischemia and the anesthesia was stopped. Four days after the reperfusion, the brain was removed and formalin-fixed. Sections of 4 ⁇ m in thickness were prepared and stained with hematoxylin-eosin. Surviving cells in the entire hippocampus CA1 field on both sides of each specimen were counted using a micrometer under the microscope. The number of surviving cells per 0.5 mm was obtained.
  • Compound 24 was suspended in 1% HPC and orally given one hour before the cerebral ischemia and 5 hours after the reperfusion. Then, two doses per day were given from the following day to the third day since the perfusion. The surviving cell count in the hippocampus CA1 field was expressed by the average ⁇ standard error. The Mann-Whitney's U test was used to obtain significant differences. The effective oral dosage of Compound 24 was plotted as abscissa and the surviving cell count/0.5 mm was plotted as ordinate.
  • FIG. 1 is a graphical representation for explaining the hippocampus CA1 field protection activity of Compound 24 in the gerbil transient forebrain ischemia model.
  • ** indicates p ⁇ 0.01 vs the control.
  • FIG. 2 is photographs for explaining the neuroprotective activity in delayed neuronal death in the hippocampus CA1 region in the gerbil transient forbrain ischemia model. The left photograph shows the case no Compound 24 was given and the right photograph shows the case Compound 24 was given.
  • Compound 24 was shown to reduce neuronal death and be an effective neuroprotectant.
  • Compound 24 is expected to be effective as a neuroprotectant for cerebrovascular disorders such as transient ischemic attack, cerebral hemorrhage, subarachnoid hemorrhage, intracranial hemorrhage with cerebral arteriovenous malformation, cerebral infarct, and hypertensive encephalopathy.
  • a compound having Formula (I) was shown to have neuroprotective activity in a study on reduction in delayed neuronal death in the hippocampus CA1 field in the gerbil transient forebrain ischemia model.
  • the sections were immunostained with streptavidin-biotin using a VECTASTATIN ABC kit. After one hour of incubation in 10% normal goat serum, the anti-amyloid ⁇ (A ⁇ ) antibody was diluted with PBS to ten fold and incubated at 4° C. overnight. The following day, PBS rinsing, 1.5 hours of incubation with biotinylated anti-rabbit secondary antibody, PBS rinsing, and 1.5 hours of incubation with peroxidase-labeled streptavidin were conducted. The immunoreaction was visualized with DAB and specimens were prepared.
  • Immunoreactive A ⁇ -like granules in the hippocampus were counted under the microscope. The A ⁇ -like immunoreactive granule was observed as brown deposits in the hippocampus. The count was made for one section per individual.
  • FIG. 3 contains photographs showing the influence of Compound 24 on the number of amyloid ⁇ -immunoreactive cells in senescene accelerated mice (SAMP8).
  • the photographs at the top show stained images of amyloid ⁇ -like granules in the hippocampus of senescene accelerated mice (SAMP8) given tap water as drinking water for 2 months from age of 8 months.
  • the photographs at the bottom show stained images of amyloid ⁇ -like immunoreactivity in the hippocampus of senescene accelerated mice (SAMP8) given Compound 24 in drinking water at an effective oral dosage of 0.1 mg per kilogram of body weight for 2 months.
  • FIG. 4 is a graphical representation showing the influence of Compound 24 on the number of amyloid ⁇ -immunoreactive cells in senescene accelerated mice (SAMP8).
  • the effective oral dosage of Compound 24 is plotted as abscissa and the number of amyloid ⁇ -immunoreactive granules is plotted as ordinate.
  • SAMP8 Nine senescene accelerated mice (SAMP8) were given no Compound 24.
  • Five, eight and seven senescene accelerated mice (SAMP8) were given Compound 24 at oral dosage of 0.002 mg, 0.01 mg and 0.1 mg per kilogram of body weight respectively.
  • an amyloid ⁇ -like immunoreactivity in the hippocampus was observed in senescene accelerated mice (SAMP8) given tap water as drinking water for 2 months from age of 8 months.
  • the amyloid ⁇ -like immunoreactivity was reduced in senescene accelerated mice (SAMP8) given Compound 24 in drinking water at oral dosage of 0.002 mg/kg/day, 0.01 mg/kg/day and 0.1 mg/kg/day for 2 months.
  • the number of amyloid ⁇ -immunoreactive granules was significantly (*) decreased as a result of dosing of Compound 24.
  • Compound 24 inhibits amyloid ⁇ deposition.
  • Amyloid-related pathologies for which Compound 24 may be used include cataract, glaucoma, the progression of glaucoma, age-related macular degeneration, rheumatism, osteoporosis, metabolic profiling syndrome, wrinkles, and hair loss, in which amyloid ⁇ is considered to be a factor of the disorder.
  • Compound 24 inhibits amyloid ⁇ deposition and, therefore, may also be used for to treat amyloidosis or cerebral amyloid angiopathy, which are characterized by amyloid fibrillates and deposits.
  • Senescene accelerated mice Male, 8 months old at the beginning of the study were used in the study.
  • Compound 24 dissolved in tap water was given to the senescene accelerated mice at a dosage of 0.001, 0.01, or 0.1 mg/kg/day as drinking water.
  • Tap water was given to the control mice as drinking water.
  • grading scores As an aging indicator of senescene accelerated mice, grading scores (Takeda et al., 1981) were measured after 0, 4, 8, 12, and 16 weeks of drinking water dosing in a short term study and after 12, 16, 20, 24, 28, and 32 weeks of drinking water dosing in a long term study.
  • FIG. 5 is a graphical representation showing the influence of Compound 24 on the grading scores in senescene accelerated mice (SAMP8).
  • FIG. 5 (A) shows the results of the short term study and
  • FIG. 5 (B) shows the results of the long term study. In both figures, the number of weeks of dosing is plotted as abscissa and the grading score is plotted as ordinate.
  • the grading score as an aging indicator started increasing after Week 12 of the drinking water dosing in senescene accelerated mice (SAMP8) given water while the grading score did not increase in senescene accelerated mice (SAMP8) given Compound 24 in drinking water.
  • Significant differences (*) in this activity were observed in Week 16 in the groups given Compound 24 in drinking water at effective oral dosages of 0.001, 0.01, and 0.1 mg/kg/day. The difference was notable in the group given Compound 24 in drinking water at effective oral dosage of 0.1 mg/kg/day.
  • the group given Compound 24 in drinking water at an effective oral dosage of 0.01 mg/kg/day exhibited significant differences (*, **) in Weeks 20 to 32.
  • the group given Compound 24 in drinking water at an effective oral dosage of 0.1 mg/kg/day exhibited significant differences (*, **) in Weeks 16 to 32.
  • the results show that Compound 24 significantly prevented the aging in senescene accelerated mice (SAMP8).
  • FIG. 6 is a graphical representation showing the influence of Compound 24 on the survival rate of senescene accelerated mice (SAMP8). The age in months of mice is plotted as abscissa and the survival rate (%) is plotted as ordinate.
  • a compound of Formula (I) was shown to have age retardant activity and extend the average life expectancy in a study of Compound 24 on prevention of fur deterioration and extension of the average life span in senescene accelerated mice (SAM).
  • heterocyclic compound having the general Formula (I) and prepared by the method in examples of Booklet of International Publication No. 01/09131 are described hereafter by way of example. More specifically, they were synthesized with reference to Booklet of International Publication No. 01/09131 and Booklet of International Publication No. 2002/060907 Brochure.
  • Compounds 2 to 40 of Formulae (I) were each prepared from the respective starting materials in the same manner as in Exemplary Preparation 1. Results of analysis of the obtained compounds are given for each compound. The results show that the obtained compounds were the targeted Compounds 2 to 40.
  • Results of analysis of the obtained compounds are given below for each compound. The results show that the obtained compounds were the targeted Compounds 72 to 77.
  • mice used mice as a mammal.
  • other mammals including human can be used.
  • the above Compounds 1 to 83 exhibit antidepressant, neuroprotection, amyloid ⁇ deposition inhibitory, or age retardant activity in other mammals including human.

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US20100168135A1 (en) * 2008-12-15 2010-07-01 Kim Nicholas Green Method of Inducing Cleavage of Amyloid Precursor Protein to Form a Novel Fragment
US20100256173A1 (en) * 2009-04-02 2010-10-07 Eckard Weber Method of Treating Cognitive Impairment
US20100267763A1 (en) * 2009-04-14 2010-10-21 Kim Nicholas Green Method of Decreasing Pro-ADAM10 Secretase and/or Beta Secretase Levels
US20100292344A1 (en) * 2007-03-09 2010-11-18 New York University Methods and Compositions for Treating Thalamocortical Dysrhythmia
US20100298348A1 (en) * 2009-05-11 2010-11-25 Kim Nicholas Green Method of Decreasing Ubiquitylated Protein Levels

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