Ligand-therapeutic agent conjugates, silicon-based linkers, and methods for making and using them

1. A conjugate compound of formula (I):

wherein

L is a cell-targeting ligand;

T is a therapeutic agent, with the proviso that T is not CAS Registry No. 115834-23-6(SF2446A1) or derivatives or analogues thereof;

J is a linker group;

X is independently selected from the group consisting of:

(1) a bond;

(2) O;

(3)

 which is independently and optionally substituted from 1 to 2 times with R 8 , wherein the wavy lines indicate point of attachment sites and * is the point of attachment to J and ** is the point of attachment to Si; and

(4)

 which is independently and optionally substituted from 1 to 2 times with R 8 , wherein the wavy lines indicate point of attachment sites and * is the point of attachment to J and ** is the point of attachment to Si;

Q is —(CH 2 ) n —, —CH 2 CHR 1 CH 2 —, —CH 2 CR 5 R 6 CH 2 —, —CH 2 CHR 1 CH 2 CH 2 —, —CH 2 CH 2 CHR 1 CH 2 CH 2 —, —CH 2 X 1 CH 2 —, or —CH 2 CH 2 X 1 CH 2 CH 2 —;

R 1 is C 1-6 alkyl, aryl, heteroaryl, OR 5 , NR 5 R 6 , or —N(COR 2 )R 7 , each of which is optionally substituted with R 8 ;

R 2 is H, C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl, each of which is optionally substituted with R 8 ;

R 3 is H, C 1-6 alkyl, C 3-6 cycloalkyl, or —COR 4 , each of which is optionally substituted with R 8 ;

R 4 is H, C 1-6 alkyl, or C 3-6 cycloalkyl, each of which is optionally substituted with R 8 ,

R 5 is H or C 1-6 alkyl optionally substituted with R 8 ;

R 6 is H or C 1-6 alkyl optionally substituted with R 8 ; or

R 5 and R 6 are taken together with the nitrogen to which they are attached to form a five- to seven-membered heterocyclic ring, which may be saturated or unsaturated and comprises from 1 to 5 heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and is optionally substituted from 1 to 4 times with a substituent selected independently at each occurrence thereof from the group consisting of halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, and C 1 -C 4 alkoxy;

R 7 is H, C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl, each of which is optionally substituted with R 8 ;

R 8 is H, NO 2 , CN, halogen, oxo, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 hydroxyalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, aryl, heteroaryl, COOR 9 , COR 9 , C(O)NR 9 R 10 , COONR 9 R 10 , SO 2 R 9 , SO 2 NR 9 R 10 , or OR 9 ;

R 9 is H, C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl, wherein the C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy;

R 10 is H, C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl, wherein the C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy; or

R 9 and R 10 are taken together with the nitrogen to which they are attached to form a five- to seven-membered heterocyclic ring, which may be saturated or unsaturated and comprises from 1 to 5 heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and is optionally substituted from 1 to 4 times with a substituent selected independently at each occurrence thereof from the group consisting of halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, and C 1 -C 4 alkoxy;

X 1 is O, S, SO, SO 2 , or NR 3 ;

n is 1 to 5; and

m is 1 to 8.

2. The conjugate compound according to claim 1 , wherein J is —Z—Y 2 —C(O)—Y 1 —;

Z is

wherein the wavy lines indicate point of attachment sites and * is the point of attachment to L and ** is the point of attachment to Y 2 ;

Y 1 is C 1-6 alkylene or —(X 2 —CH 2 -CH 2 ) 1 —, each of which is optionally substituted with R 8 ;

Y 2 is C 1-6 alkylene or —(CH 2 CH 2 (X 3 )) q —, each of which is optionally substituted with R 8 ;

X 2 is independently selected from the group consisting of:

(1) a bond;

(2) (CH 2 ) k ;

(3) O; and

(4) NR 12 ;

X 3 is independently selected from the group consisting of:

(1) a bond;

(2) (CH 2 ) k ;

(3) O; and

(4) NR 12 ;

R 11 is H, C 1-6 alkyl, C 1-6 hydroxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, aryl, or heteroaryl, each of which is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy;

R 12 is H, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, or C 1-6 hydroxyalkyl;

k is 1 to 3;

l is 1 to 10; and

q is 1 to 10.

3. The conjugate compound according to claim 1 , wherein J is —Z—Y 3 —;

Z is

wherein the wavy lines indicate point of attachment sites and * is the point of attachment to L and ** is the point of attachment to Y 3 ;

Y 3 is selected from the group consisting of C 1-6 alkylene, C 3 -C 8 carbocyclyl, O(CH 2 ) r , arylene, O(CH 2 ) r -arylene, -arylene-(CH 2 ) r —, (CH 2 ) r —(C 3-8 carbocyclyl), —(C 3-8 carbocyclyl)-(CH 2 ) r , C 3-8 heterocyclyl, (CH 2 ) r —(C 3-8 heterocyclyl), —(C 3-8 heterocyclyl)-(CH 2 ) r , —((X 4 )(X 5 )(CH 2 ) r (X 6 )(CH 2 ) r ) s —, and —((X 4 )(X 5 )(CH 2 ) r (X 6 )(X 7 )(CH 2 ) r ) s —, each of which is optionally substituted with R 8 ;

X 4 , X 5 , X 6 , and X 7 are each independently selected from the group consisting of a bond, (CH 2 ) k , O, C(O), S, NR 19 , C(O)O, and C(O)NR 19 ;

R 11 is H, C 1-6 alkyl, C 1-6 hydroxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, aryl, or heteroaryl, each of which is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy;

R 19 is H, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, or C 1-6 hydroxyalkyl;

each r is 0 to 16; and

s is 1 to 10.

4. The conjugate compound according to claim 1 , wherein Q is —(CH 2 ) n — and n is 1 to 5.

5. The conjugate compound according to claim 1 , wherein J further comprises a thiol-containing spacer.

6. The conjugate compound according to claim 1 , wherein L is a protein, a peptide, an amino acid, a receptor ligand, a hormone, or a growth factor.

7. The conjugate compound according to claim 6 , wherein L is selected from the group consisting of an antibody, an antibody fragment, scFv-Fc, minibody, diabody, scFv, folic acid, bombesin, EDG, transferrin, gastrin, gastrin-releasing peptide, platelet-derived growth factor, IL-2, IL-6, TFG-alpha, TFG-beta, VGF, insulin, and insulin-like growth factors I and II.

8. The conjugate compound according to claim 6 , wherein L is an antibody which binds to one or more tumor-associated antigens or cell-surface receptors selected from (1)-(35):

(1) BMPR1B (bone morphogenetic protein receptor-type IB, Genbank Accession No. NM 13 001203);

(2) E16 (LAT1, SLC7A5, Genbank Accession No. NM_003486);

(3) STEAP1 (six transmembrane epithelial antigen of prostate, Genbank Accession No. NM_012449);

(4) 0772P (CA125, MUC16, Genbank Accession No. AF361486);

(5) MPF (MPF, MSLN, SMR, megakaryocyte potentiating factor, mesothelin, Genbank Accession No. NM_005823);

(6) Napi3b (NAPI-3B, NPTIIb, SLC34A2, solute carrier family 34 (sodium phosphate), member 2, type II sodium-dependent phosphate transporter 3b, Genbank Accession No. NM_006424);

(7) Sema 5b (FLJ10372, KIAA1445, Mm.42015, SEMA5B, SEMAG, Semaphorin5bHlog, sema domain, seven thrombospondin repeats (type 1 and type 1-like), transmembrane domain (TM) and short cytoplasmic domain, (semaphorin) 5B, Genbank Accession No. AB040878);

(8) PSCA hlg (2700050C12Rik, C530008O16Rik, RIKEN cDNA 2700050C12, RIKEN cDNA 2700050C12 gene, Genbank Accession No. AY358628);

(9) ETBR (Endothelin type B receptor, Genbank Accession No. AY275463);

(10) MSG783 (RNF124, hypotheticalproteinFLJ20315, Genbank Accession No. NM_017763);

(11) STEAP2 (HGNC_8639, IPCA-1, PCANAP1, STAMP1, STEAP2, STMP, prostate cancer associated gene 1, prostate cancer associated protein 1, six transmembrane epithelial antigen of prostate 2, six transmembrane prostate protein, Genbank Accession No. AF455138);

(12) TrpM4 (BR22450, FLJ20041, TRPM4, TRPM4B, transient receptor potential cation channel, subfamily M, member 4, Genbank Accession No. NM_017636);

(13) CRIPTO (CR, CR1, CRGF, CRIPTO, TDGF1, teratocarcinoma-derived growth factor, Genbank Accession No. NP_003203 or NM_003212);

(14) CD21 (CR2 (Complement receptor 2) or C3DR (C3d/Epstein Barr virus receptor) or Hs.73792 Genbank Accession No. M26004);

(15) CD79b (CD79B, CD79β IGb (immunoglobulin-associated beta), B29, Genbank Accession No. NM_000626);

(16) FcRH2 (IFGP4, IRTA4, SPAP1A (SH2 domain containing phosphatase anchor protein 1a), SPAP1B, SPAP1C, Genbank Accession No. NM_030764);

(17) HER2 (Genbank Accession No. M11730);

(18) NCA (Genbank Accession No. M18728);

(19) MDP (Genbank Accession No. BC017023);

(20) IL20Rα (Genbank Accession No. AF184971);

(21) Brevican (Genbank Accession No. AF229053);

(22) Ephb2R (Genbank Accession No. NM_004442);

(23) ASLG659 (Genbank Accession No. AX092328);

(24) PSCA (Genbank Accession No. AJ297436);

(25) GEDA (Genbank Accession No. AY260763);

(26) BAFF-R (B cell-activating factor receptor, BLyS receptor 3, BR3, Genbank Accession No. NP_443177.1);

(27) CD22 (B-cell receptor CD22-B isoform, Genbank Accession No. NP-001762.1);

(28) CD79a (CD79A, CD79α, immunoglobulin-associated alpha, a B cell-specific protein that covalently interacts with Ig beta (CD79B) and forms a complex on the surface with Ig M molecules, transduces a signal involved in B-cell differentiation, Genbank Accession No. NP_001774.1);

(29) CXCR5 (Burkitt's lymphoma receptor 1, a G protein-coupled receptor that is activated by the CXCL13 chemokine, functions in lymphocyte migration and humoral defense, plays a role in HIV -2 infection and perhaps development of AIDS, lymphoma, myeloma, and leukemia, Genbank Accession No. NP_001707.1);

(30) HLA-DOB (Beta subunit of MHC class II molecule (Ia antigen) that binds peptides and presents them to CD4+ T lymphocytes, Genbank Accession No. NP_002111.1);

(31) P2X5 (Purinergic receptor P2X ligand-gated ion channel 5, an ion channel gated by extracellular ATP, Genbank Accession No. NP_002552.2);

(32) CD72 (B-cell differentiation antigen CD72, Lyb-2, Genbank Accession No. NP_001773.1);

(33) LY64 (Lymphocyte antigen 64 (RP105), type I membrane protein of the leucine rich repeat (LRR) family, regulates B-cell activation and apoptosis, loss of function is associated with increased disease activity in patients with systemic lupus erythematosis, Genbank Accession No. NP_005573.1);

(34) FCRH1 (Fc receptor-like protein 1, a putative receptor for the immunoglobulin Fc domain that contains C2 type Ig-like and ITAM domains, Genbank Accession No. NP_443170.1); and

(35) IRTA2 (Immunoglobulin superfamily receptor translocation associated 2, a putative immunoreceptor with possible roles in B cell development and lymphomagenesis; deregulation of the gene by translocation occurs in some B cell malignancies, Genbank Accession No. NP_112571.1).

9. The conjugate compound according to claim 6 , wherein L is folic acid.

10. The conjugate compound according to claim 6 , wherein L is epidermal growth factor.

11. The conjugate compound according to claim 1 , wherein T is a hydroxyl-containing drug moiety.

12. The conjugate compound according to claim 1 , wherein T is an anticancer agent selected from the group consisting of N8-acetyl spermidine, actinomycin, 9-amino camptothecin, aminopterin, anguidine, anthracycline, auristatin, bleomycin, calicheamycin, camptothecin, carminomycin, CC-1065, clofaribine, 1-(2-chloroethyl)-1,2-dimethanesulfonyl hydrazide, cyclopropabenzindol-4-one (CBI), cytarabine, cytosine arabinoside, daunorubicin, dichloromethotrexate, n-(5,5-diacetoxy-pentyl) doxorubicin, 1,8-dihydroxy-bicycle[7.3.1] trideca-4-9-diene-2,6-diyne-13-one, difluoronucleosides, doxorubicin, duocarmycin, epirubicin, esperamicin, etoposide, 5-fluorouracil, irinotecan, leurosideine, leurosine, maytansine, melphalan, 6-mercaptopurine, methopterin, methotrexate, mitomycin A, mitomycin C, morpholine-doxorubicin, butyric acid, cisplatin, diacetoxypentyldoxorubicin, maytansinol, capecitabine, leuprolide, bicalutamide, goserelin, 17-AAG, 17-DMAG, des-acetyl vinblastine, nemorubicin, podophyllotoxin, podophyllotoxin derivatives, retinoic acid, saporin, tallysomycin, vinblastine, vincristine, vindesine, taxane, taxol, paclitaxel, taxotere, docetaxel, taxotere retinoic acid, and isomers, salt forms, analogues, and derivatives thereof.

13. The conjugate compound according to claim 1 having the formula:

14. The conjugate compound according to claim 1 having the formula:

15. A pharmaceutical composition comprising:

a pharmaceutically acceptable carrier and the conjugate compound according to claim 1 .

16. A method of therapeutically treating carcinomas of the lung in a subject in need thereof comprising:

selecting a cancer subject in need of therapeutic treatment of carcinoma of the lung, and

administering to the selected subject a therapeutically acceptable amount of a conjugate compound according to claim 1 .

17. A conjugate compound of formula (III):

wherein

L is a cell-targeting ligand;

T is a therapeutic agent, with the proviso that T is not CAS Registry No. 115834-23-6 (SF2446A1) or derivatives or analogues thereof;

J is a linker group, with the proviso that when X is a bond, J cannot directly bond to the silicon atom with an O, NH, N—CH 3 , S, or carboxyl and forms a hydrolytically stable carbon bond with the silicon atom;

X is independently selected from the group consisting of:

(1) a bond;

(2)

 which is independently and optionally substituted from 1 to 2 times with R 15 , wherein the wavy lines indicate point of attachment sites and * is the point of attachment to J and ** is the point of attachment to Si; and

(3)

 which is independently and optionally substituted from 1 to 2 times with R 15 , wherein the wavy lines indicate point of attachment sites and * is the point of attachment to J and ** is the point of attachment to Si;

R 13 and R 14 are each independently selected from the group consisting of C 1-6 alkyl, C 3-6 cycloalkyl, aryl, and heteroaryl, each of which is optionally substituted with R 16 ;

R 15 is H, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 hydroxyalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, CN, halogen, NO 2 , oxo, aryl, heteroaryl, OR 17 , COOR 17 , COR 17 , CONR 17 R 18 , COONR 17 R 18 , SO 2 R 17 , or SO 2 NR 17 R 18 ;

R 16 is H, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, CN, halogen, NO 2 , OR 17 , NR 17 R 18 , COOR 17 , COR 17 , CONR 17 R 18 , SO 2 R 17 , —SO 2 NR 17 R 18 , aryl, or heteroaryl;

R 17 is H, C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl, wherein the C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy;

R 18 is H, C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl, wherein the C 1-6 alkyl, C 3-6 cycloalkyl, aryl, or heteroaryl is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy; or

R 17 and R 18 are taken together with the nitrogen to which they are attached to form a five- to seven-membered heterocyclic ring, which may be saturated or unsaturated and comprises from 1 to 5 heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, and is optionally substituted from 1 to 4 times with a substituent selected independently at each occurrence thereof from the group consisting of halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, and C 1 -C 4 alkoxy; and

v is 1 to 8.

18. The conjugate compound according to claim 17 , wherein J is —Z—Y 2 —C(O)—Y 1 —;

Z is

wherein the wavy lines indicate point of attachment sites and * is the point of attachment to L and ** is the point of attachment to Y 2 ;

Y 1 is C 1-6 alkylene or —(X 2 —CH 2 —CH 2 ) 1 —, each of which is optionally substituted with R 8 ;

Y 2 is C 1-6 alkylene or —(CH 2 CH 2 (X 3 )) q —, each of which is optionally substituted with R 8 ;

X 2 is independently selected from the group consisting of:

(1) a bond;

(2) (CH 2 ) k ;

(3) O; and

(4) NR 12 ;

X 3 is independently selected from the group consisting of:

(1) a bond;

(2) (CH 2 ) k ;

(3) O; and

(4) NR 12 ;

R 11 is H, C 1-6 alkyl, C 1-6 hydroxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, aryl, or heteroaryl, each of which is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy;

R 12 is H, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, or C 1-6 hydroxyalkyl;

k is 1 to 3;

l is 1 to 10; and

q is 1 to 10.

19. The conjugate compound according to claim 17 , wherein J is —Z—Y 3 —;

Z is

wherein the wavy lines indicate point of attachment sites and * is the point of attachment to L and ** is the point of attachment to Y 3 ;

Y 3 is selected from the group consisting of C 1-6 alkylene, C 3 -C 8 carbocyclyl, O(CH 2 ) r , arylene, O(CH 2 ) r -arylene, -arylene-(CH 2 ) r -, (CH 2 ) r —(C 3-8 carbocyclyl), —(C 3-8 carbocyclyl)-(CH 2 ) r , C 3-8 heterocyclyl, (CH 2 ) r —(C 3-8 heterocyclyl), —(C 3-8 heterocyclyl)-(CH 2 ) r , —((X 4 )(X 5 )(CH 2 ) r (X 6 )(CH 2 ) r ) s —, and —((X 4 )(X 5 )(CH 2 ) r (X 6 )(X 7 )(CH 2 ) r ) s —, each of which is optionally substituted with R 8 ;

X 4 , X 5 , X 6 , and X 7 are each independently selected from the group consisting of a bond, (CH 2 ) k , O, C(O), S, NR 19 , C(O)O, and C(O)NR 19 ;

R 11 is H, C 1-6 alkyl, C 1-6 hydroxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, aryl, or heteroaryl, each of which is optionally substituted from 1 to 3 times with halogen, hydroxyl, cyano, oxo, C 1 -C 4 alkyl, C 1 -C 4 haloalkyl, or C 1 -C 4 alkoxy;

R 19 is H, C 1-6 alkyl, C 1-6 haloalkyl, C 1-6 alkoxyalkyl, C 3-6 cycloalkyl, C 4-7 cycloalkylalkyl, or C 1-6 hydroxyalkyl;

each r is 0 to 16; and

s is 1 to 10.

20. The conjugate compound according to claim 17 , wherein R 13 and R 14 are each C 1-6 alkyl or phenyl.

21. The conjugate compound according to claim 17 , wherein J further comprises a thiol-containing spacer.

22. The conjugate compound according to claim 17 , wherein L is a protein, a peptide, an amino acid, a receptor ligand, a hormone, or a growth factor.

23. The conjugate compound according to claim 22 , wherein L is selected from the group consisting of an antibody, an antibody fragment, scFv-Fc, minibody, diabody, scFv, folic acid, bombesin, EDG, transferrin, gastrin, gastrin-releasing peptide, platelet-derived growth factor, IL-2, IL-6, TFG-alpha, TFG-beta, VGF, insulin, and insulin-like growth factors I and II.

24. The conjugate compound according to claim 22 , wherein L is an antibody which binds to one or more tumor-associated antigens or cell-surface receptors selected from (1)-(35):

(1) BMPR1B (bone morphogenetic protein receptor-type IB, Genbank Accession No. NM—001203);

(2) E16 (LAT1, SLC7A5, Genbank Accession No. NM—003486);

(3) STEAP1 (six transmembrane epithelial antigen of prostate, Genbank Accession No. NM—012449);

(4) 0772P (CA125, MUC16, Genbank Accession No. AF361486);

(5) MPF (MPF, MSLN, SMR, megakaryocyte potentiating factor, mesothelin, Genbank Accession No. NM—005823);

(6) Napi3b (NAPI-3B, NPTIIb, SLC34A2, solute carrier family 34 (sodium phosphate), member 2, type II sodium-dependent phosphate transporter 3b, Genbank Accession No. NM—006424);

(7) Sema 5b (FLJ10372, KIAA1445, Mm.42015, SEMA5B, SEMAG, Semaphorin 5bHlog, sema domain, seven thrombospondin repeats (type 1 and type 1-like), transmembrane domain (TM) and short cytoplasmic domain, (semaphorin) 5B, Genbank Accession No. AB040878);

(8) PSCA hlg (2700050C12Rik, C530008O16Rik, RIKEN cDNA 2700050C12, RIKEN cDNA 2700050C12 gene, Genbank Accession No. AY358628);

(9) ETBR (Endothelin type B receptor, Genbank Accession No. AY275463);

(10) MSG783 (RNF124, hypotheticalproteinFLJ20315, Genbank Accession No. NM—017763);

(11) STEAP2 (HGNC_8639, IPCA-1, PCANAP1, STAMP1, STEAP2, STMP, prostate cancer associated gene 1, prostate cancer associated protein 1, six transmembrane epithelial antigen of prostate 2, six transmembrane prostate protein, Genbank Accession No. AF455138);

(12) TrpM4 (BR22450, FLJ20041, TRPM4, TRPM4B, transient receptor potential cation channel, subfamily M, member 4, Genbank Accession No. NM_017636);

(13) CRIPTO (CR, CR1, CRGF, CRIPTO, TDGF1, teratocarcinoma-derived growth factor, Genbank Accession No. NP_003203 or NM_003212);

(14) CD21 (CR2 (Complement receptor 2) or C3DR (C3d/Epstein Barr virus receptor) or Hs.73792 Genbank Accession No. M26004);

(15) CD79b (CD79B, CD79β IGb (immunoglobulin-associated beta), B29, Genbank Accession No. NM_000626);

(16) FcRH2 (IFGP4, IRTA4, SPAP1A (SH2 domain containing phosphatase anchor protein 1a), SPAP1B, SPAP1C, Genbank Accession No. NM_030764);

(17) HER2 (Genbank Accession No. M11730);

(18) NCA (Genbank Accession No. M18728);

(19) MDP (Genbank Accession No. BC017023);

(20) IL20Rα (Genbank Accession No. AF184971);

(21) Brevican (Genbank Accession No. AF229053);

(22) Ephb2R (Genbank Accession No. NM_004442);

(23) ASLG659 (Genbank Accession No. AX092328);

(24) PSCA (Genbank Accession No. AJ297436);

(25) GEDA (Genbank Accession No. AY260763);

(26) BAFF-R (B cell-activating factor receptor, BLyS receptor 3, BR3, GenBank Accession No. NP_443177.1);

(27) CD22 (B-cell receptor CD22-B isoform, GenBank Accession No. NP-001762.1);

(28) CD79a (CD79A, CD79α, immunoglobulin-associated alpha, a B cell-specific protein that covalently interacts with Ig beta (CD79B) and forms a complex on the surface with Ig M molecules, transduces a signal involved in B-cell differentiation, Genbank Accession No. NP_001774.1);

(29) CXCR5 (Burkitt's lymphoma receptor 1, a G protein-coupled receptor that is activated by the CXCL13 chemokine, functions in lymphocyte migration and humoral defense, plays a role in HIV -2 infection and perhaps development of AIDS, lymphoma, myeloma, and leukemia, Genbank Accession No. NP_001707.1);

(30) HLA-DOB (Beta subunit of MHC class II molecule (Ia antigen) that binds peptides and presents them to CD4+T lymphocytes, Genbank Accession No. NP_002111.1);

(31) P2X5 (Purinergic receptor P2X ligand-gated ion channel 5, an ion channel gated by extracellular ATP, Genbank Accession No. NP_002552.2);

(32) CD72 (B-cell differentiation antigen CD72, Lyb-2, Genbank Accession No. NP_001773.1);

(33) LY64 (Lymphocyte antigen 64 (RP105), type I membrane protein of the leucine rich repeat (LRR) family, regulates B-cell activation and apoptosis, loss of function is associated with increased disease activity in patients with systemic lupus erythematosis, Genbank Accession No. NP_005573.1);

(34) FCRH1 (Fc receptor-like protein 1, a putative receptor for the immunoglobulin Fc domain that contains C2 type Ig-like and ITAM domains, Genbank Accession No. NP_443170.1); and

(35) IRTA2 (Immunoglobulin superfamily receptor translocation associated 2, a putative immunoreceptor with possible roles in B cell development and lymphomagenesis; deregulation of the gene by translocation occurs in some B cell malignancies, Genbank Accession No. NP_112571.1).

25. The conjugate compound according to claim 22 , wherein L is folic acid.

26. The conjugate compound according to claim 22 , wherein L is epidermal growth factor.

27. The conjugate compound according to claim 17 , wherein T is a hydroxyl-containing drug moiety.

28. The conjugate compound according to claim 17 , wherein T is an anticancer agent selected from the group consisting of N8-acetyl spermidine, actinomycin, 9-amino camptothecin, aminopterin, anguidine, anthracycline, auristatin, bleomycin, calicheamycin, camptothecin, carminomycin, CC-1065, clofaribine, 1-(2-chloroethyl)-1,2-dimethanesulfonyl hydrazide, cyclopropabenzindol-4-one (CBI), cytarabine, cytosine arabinoside, daunorubicin, dichloromethotrexate, n-(5,5-diacetoxy-pentyl) doxorubicin, 1,8-dihydroxy-bicycle[7.3.1] trideca-4-9-diene-2,6-diyne-13-one, difluoronucleosides, doxorubicin, duocarmycin, epirubicin, esperamicin, etoposide, 5-fluorouracil, irinotecan, leurosideine, leurosine, maytansine, melphalan, 6-mercaptopurine, methopterin, methotrexate, mitomycin A, mitomycin C, morpholine-doxorubicin, butyric acid, cisplatin, diacetoxypentyldoxorubicin, maytansinol, capecitabine, leuprolide, bicalutamide, goserelin, 17-AAG, 17-DMAG, des-acetyl vinblastine, nemorubicin, podophyllotoxin, podophyllotoxin derivatives, retinoic acid, saporin, tallysomycin, vinblastine, vincristine, vindesine, taxane, taxol, paclitaxel, taxotere, docetaxel, taxotere retinoic acid, and isomers, salt forms, analogues, and derivatives thereof.

29. The conjugate compound according to claim 17 having the formula:

30. The conjugate compound according to claim 17 having the formula:

31. A pharmaceutical composition comprising:

a pharmaceutically acceptable carrier and the conjugate compound according to claim 17 .

32. A method of therapeutically treating carcinomas of the lung in a subject in need thereof comprising:

selecting a cancer subject in need of therapeutic treatment of carcinoma of the lung, and

administering to the selected subject a therapeutically acceptable amount of a conjugate compound according to claim 17 .