Three ROR1-targeted antibody-drug conjugates are in clinical trials: MK-2140, NBE-002, and CS5001. MK-2140, developed by Merck, links MMAE to an anti-ROR1 antibody and has shown an ORR of 30-80% in phase 1/2 trials. NBE-002, developed by Boehringer Ingelheim, uses site-specific conjugation of an anti-ROR1 antibody to a toxin and aims to convert cold tumors to hot tumors. CS5001, developed by CStone Pharmaceuticals, uses a novel linker and prodrug strategy to improve safety, and is in phase 1 trials. ROR1 is highly expressed
Antibody–Oligonucleotide Conjugates (AOCs) in Clinical Trials.pdfDoriaFang
Summary of Antibody–Oligonucleotide Conjugates(AOCs) in Clinical Trials, including products from Avidity Biosciences, Dyne Therapeutics, Tallac Therapeutics and Denali Therapeutics.
Summary of PROTAC Degraders in Clinical Trials.pdfDoriaFang
A major class of molecules that may enable such proteins to be modulated through TPD are known as proteolysis-targeting chimera (PROTAC) protein degraders. Here we talk about the summary of PROTAC degraders in clinical trials.
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Curcumin Based Nanotherapy of Cancer A Reviewijtsrd
Cancer is the most prevalent disease not only in the United States but worldwide. The most representative polyphenol component extracted from the rhizomes of Curcuma long a known as turmeric is curcumin. The therapeutic benefits of curcumin have been demonstrated in multiple chronic diseases inflammation, arthritis, metabolic syndrome, liver disease, obesity, neurodegenerative diseases and, above all, in several cancers. Chemotherapy is a major form of treatment modality for various human diseases and disorders in both developing and developed countries. This intervention has been associated with a number of side effects and poor compliance. Therefore, in recent years, a significant effort has been put forward for finding a better treatment modality that uses natural compounds or extracts. Among many naturally occurring polyphenol compounds, curcumin is a highly safe yellow pigment molecule, widely used as a food coloring agent, and can be used to treat various pathological conditions. Rushikesh Mulay | Rishikesh Bachhav "Curcumin Based Nanotherapy of Cancer - A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-6 , October 2021, URL: https://www.ijtsrd.com/papers/ijtsrd46376.pdf Paper URL : https://www.ijtsrd.com/pharmacy/analytical-chemistry/46376/curcumin-based-nanotherapy-of-cancer--a-review/rushikesh-mulay
Similar to HER2, Trop-2 is a new hot target for research. Trodelvy has been one of the products receiving much attention in recent years, and Dato-DXd from AstraZeneca/Daiichi Sankyo is also advancing rapidly.
Antibody–Oligonucleotide Conjugates (AOCs) in Clinical Trials.pdfDoriaFang
Summary of Antibody–Oligonucleotide Conjugates(AOCs) in Clinical Trials, including products from Avidity Biosciences, Dyne Therapeutics, Tallac Therapeutics and Denali Therapeutics.
Summary of PROTAC Degraders in Clinical Trials.pdfDoriaFang
A major class of molecules that may enable such proteins to be modulated through TPD are known as proteolysis-targeting chimera (PROTAC) protein degraders. Here we talk about the summary of PROTAC degraders in clinical trials.
Summary of PROTAC And Other Targeted Protein Degradation Technologies.pdfDoriaFang
We summarize various targeted degradation strategies and their respective advantages and disadvantages, hoping to provide guidance value for the development of targeted protein degradation drugs.
Curcumin Based Nanotherapy of Cancer A Reviewijtsrd
Cancer is the most prevalent disease not only in the United States but worldwide. The most representative polyphenol component extracted from the rhizomes of Curcuma long a known as turmeric is curcumin. The therapeutic benefits of curcumin have been demonstrated in multiple chronic diseases inflammation, arthritis, metabolic syndrome, liver disease, obesity, neurodegenerative diseases and, above all, in several cancers. Chemotherapy is a major form of treatment modality for various human diseases and disorders in both developing and developed countries. This intervention has been associated with a number of side effects and poor compliance. Therefore, in recent years, a significant effort has been put forward for finding a better treatment modality that uses natural compounds or extracts. Among many naturally occurring polyphenol compounds, curcumin is a highly safe yellow pigment molecule, widely used as a food coloring agent, and can be used to treat various pathological conditions. Rushikesh Mulay | Rishikesh Bachhav "Curcumin Based Nanotherapy of Cancer - A Review" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-5 | Issue-6 , October 2021, URL: https://www.ijtsrd.com/papers/ijtsrd46376.pdf Paper URL : https://www.ijtsrd.com/pharmacy/analytical-chemistry/46376/curcumin-based-nanotherapy-of-cancer--a-review/rushikesh-mulay
Similar to HER2, Trop-2 is a new hot target for research. Trodelvy has been one of the products receiving much attention in recent years, and Dato-DXd from AstraZeneca/Daiichi Sankyo is also advancing rapidly.
In recent years, the approval of nucleic acid therapeutics for listing has been accelerating. Numerous nucleic acid therapeutics that have the potential to become blockbuster drugs have released clinical data covering cardiovascular and metabolic diseases, liver diseases, and a variety of rare diseases. Especially after the approval of the two mRNA COVID-19 vaccines, nucleic acid therapeutics have received more and more attention from the world.
Several Types of PROTACs Based On Nucleic AcidsDoriaFang
So far, more than 10 nucleic acid drugs have been approved for marketing worldwide, and many nucleic acid drugs are in the stage of clinical trials. Nucleic acid drugs are expected to become the third type of drugs after small molecule drugs and antibody drugs.
Oncodesign aacr 2018 morab-202 a folate receptor alpha-targeted antibody-dr...Florence Fombertasse
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In this study, we report the development of MORAb-202, an anti-FRA antibody-drug conjugate (ADC), consisting of a FRA-binding antibody (MORAb-003, farletuzumab) with a cathepsin-cleavable form of eribulin (eribulin mesylate, marketed as Halaven®), a highly potent anti-mitotic agent that induces cell-cycle arrest and cell death by targeting microtubules.*
We first study expression of FRA on a large panel of tumors patient-derived xenograft (PDX) and Cancer Cell Line-derived Xenograft (CDX). Then, we performed in vitro and in vivo anti-proliferation assays and compare antitumor activity of MORAb-202 with free eribulin accordingly to the FRA expression level. FRA expression was found to be determinant in the sensitivity of tumor cells to the cytotoxic effect of the ADC. Moreover, in case of high expression of FRA, MORAb-202 showed a higher antitumor activity compared with free eribulin.
These results suggest that FRA expression could be used as a response-predictive biomarker for this targeted therapy. The ability to identify and treat patients with an effective therapy based on the known expression of the tumor marker is a key point in predictive medicine progress. These findings support the clinical development of MORAb-202 ADC as a novel targeted therapy for patients with FRA-expressing tumors.
The ADC described in this abstract is investigational, as efficacy and safety have not been established. There is no guarantee that this ADC will be available commercially.
Trophoblast Glycoprotein (TPGB5T4) A New Target For ADC Drugs.pdfDoriaFang
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mRNA rather than DNA may become the nucleotide framework for new classes of drugs and vaccines. Exciting preclinical results in prophylaxis and initial clinical data in oncology suggest that mRNA technology could be translated into improvements in lung cancer and other diseases.
Dr. Ananda Kumar Kondepati, M.D. and
Dr. Shalini D. Pasumarthi, M.D.
Canada, 2015
Clinical Research Program Supervisor:
Pr. Peivand Pirouzi, Ph.D., M.B.A., C.C.P.E.
Keto reductases (AKRs) are overexpressed in a large number of human tumors and mediate
resistance to cancer chemotherapeutics and antihormonal therapies. Existing drugs and new agents in development may surmount this resistance by acting as specific AKR isoforms or AKR
pan-inhibitors to improve clinical outcome.
Keto reductases (AKRs) are overexpressed in a large number of human tumors and mediate
resistance to cancer chemotherapeutics and antihormonal therapies. Existing drugs and new
agents in development may surmount this resistance by acting as specific AKR isoforms or AKR
pan-inhibitors to improve clinical outcome.
Keto reductases (AKRs) catalyze the NADPH-dependent reduction of carbonyl groups to
alcohols for conjugation reactions to proceed. They are implicated in resistance to cancer
chemotherapeutic agents either because they are directly involved in their metabolism or help
eradicate the cellular stress created by these agents (e.g., reactive oxygen species and lipid
peroxides). Furthermore, this cellular stress activates the nuclear factor-erythroid 2 p45-related
factor 2 (NRF2)-Kelch-like ECH-associated protein 1 pathway. As many human AKR genes are
upregulated by the NRF2 transcription factor, this leads to a feed-forward mechanism to enhance
drug resistance. Resistance to major classes of chemotherapeutic agents (anthracyclines,
mitomycin, cis-platin, antitubulin agents, vinca alkaloids, and cyclophosphamide) occurs by this
mechanism. Human AKRs also catalyze the synthesis of androgens and estrogens and the
elimination of progestogens and are involved in hormonal-dependent malignancies. They are
upregulated by antihormonal therapy providing a second mechanism for cancer drug resistance.
Inhibitors of the NRF2 system or pan-AKR1C inhibitors offer promise to surmount cancer drug
resistance and/or synergize the effects of existing drugs.
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In recent years, the approval of nucleic acid therapeutics for listing has been accelerating. Numerous nucleic acid therapeutics that have the potential to become blockbuster drugs have released clinical data covering cardiovascular and metabolic diseases, liver diseases, and a variety of rare diseases. Especially after the approval of the two mRNA COVID-19 vaccines, nucleic acid therapeutics have received more and more attention from the world.
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So far, more than 10 nucleic acid drugs have been approved for marketing worldwide, and many nucleic acid drugs are in the stage of clinical trials. Nucleic acid drugs are expected to become the third type of drugs after small molecule drugs and antibody drugs.
Oncodesign aacr 2018 morab-202 a folate receptor alpha-targeted antibody-dr...Florence Fombertasse
Folate receptor alpha (FRA) is a membrane protein with high affinity for binding and transporting folate into cells. Overexpression of FRA may confer a growth advantage to tumors by increasing folate uptake and affecting cell proliferation via alternative cell signaling pathways (1). FRA levels have been found to be elevated in tumors of epithelial origin compared to normal tissue as cancers of the breast (including TNBC (2)), colon, lungs and ovary (3).
In this study, we report the development of MORAb-202, an anti-FRA antibody-drug conjugate (ADC), consisting of a FRA-binding antibody (MORAb-003, farletuzumab) with a cathepsin-cleavable form of eribulin (eribulin mesylate, marketed as Halaven®), a highly potent anti-mitotic agent that induces cell-cycle arrest and cell death by targeting microtubules.*
We first study expression of FRA on a large panel of tumors patient-derived xenograft (PDX) and Cancer Cell Line-derived Xenograft (CDX). Then, we performed in vitro and in vivo anti-proliferation assays and compare antitumor activity of MORAb-202 with free eribulin accordingly to the FRA expression level. FRA expression was found to be determinant in the sensitivity of tumor cells to the cytotoxic effect of the ADC. Moreover, in case of high expression of FRA, MORAb-202 showed a higher antitumor activity compared with free eribulin.
These results suggest that FRA expression could be used as a response-predictive biomarker for this targeted therapy. The ability to identify and treat patients with an effective therapy based on the known expression of the tumor marker is a key point in predictive medicine progress. These findings support the clinical development of MORAb-202 ADC as a novel targeted therapy for patients with FRA-expressing tumors.
The ADC described in this abstract is investigational, as efficacy and safety have not been established. There is no guarantee that this ADC will be available commercially.
Trophoblast Glycoprotein (TPGB5T4) A New Target For ADC Drugs.pdfDoriaFang
The more popular targets in ADC drugs include HER2, TROP2, EGFR, CLDN18.2, c-Met, CD19, PSMA, Muc1, BCMA and PDL1. Here we will introduce a new ADC target trophoblast glycoprotein (TPBG).
mRNA rather than DNA may become the nucleotide framework for new classes of drugs and vaccines. Exciting preclinical results in prophylaxis and initial clinical data in oncology suggest that mRNA technology could be translated into improvements in lung cancer and other diseases.
Dr. Ananda Kumar Kondepati, M.D. and
Dr. Shalini D. Pasumarthi, M.D.
Canada, 2015
Clinical Research Program Supervisor:
Pr. Peivand Pirouzi, Ph.D., M.B.A., C.C.P.E.
Keto reductases (AKRs) are overexpressed in a large number of human tumors and mediate
resistance to cancer chemotherapeutics and antihormonal therapies. Existing drugs and new agents in development may surmount this resistance by acting as specific AKR isoforms or AKR
pan-inhibitors to improve clinical outcome.
Keto reductases (AKRs) are overexpressed in a large number of human tumors and mediate
resistance to cancer chemotherapeutics and antihormonal therapies. Existing drugs and new
agents in development may surmount this resistance by acting as specific AKR isoforms or AKR
pan-inhibitors to improve clinical outcome.
Keto reductases (AKRs) catalyze the NADPH-dependent reduction of carbonyl groups to
alcohols for conjugation reactions to proceed. They are implicated in resistance to cancer
chemotherapeutic agents either because they are directly involved in their metabolism or help
eradicate the cellular stress created by these agents (e.g., reactive oxygen species and lipid
peroxides). Furthermore, this cellular stress activates the nuclear factor-erythroid 2 p45-related
factor 2 (NRF2)-Kelch-like ECH-associated protein 1 pathway. As many human AKR genes are
upregulated by the NRF2 transcription factor, this leads to a feed-forward mechanism to enhance
drug resistance. Resistance to major classes of chemotherapeutic agents (anthracyclines,
mitomycin, cis-platin, antitubulin agents, vinca alkaloids, and cyclophosphamide) occurs by this
mechanism. Human AKRs also catalyze the synthesis of androgens and estrogens and the
elimination of progestogens and are involved in hormonal-dependent malignancies. They are
upregulated by antihormonal therapy providing a second mechanism for cancer drug resistance.
Inhibitors of the NRF2 system or pan-AKR1C inhibitors offer promise to surmount cancer drug
resistance and/or synergize the effects of existing drugs.
IRF5 Promotes the Progression of Hepatocellular Carcinoma and is Regulated by...JohnJulie1
The IRF family of proteins involves in the tumor progression. However, but the functions of IRF5 in the tumorigenesis are largely unknown. Here, IRF5 was found to be up-regulated in hepatocellular carcinoma (HCC). Interfering with IRF5 inhibited the growth and tumorigenic ability of HCC cells.
IRF5 Promotes the Progression of Hepatocellular Carcinoma and is Regulated by...NainaAnon
The IRF family of proteins involves in the tumor progression. However, but the functions of IRF5 in the tumorigenesis are largely unknown. Here, IRF5 was found to be up-regulated in hepatocellular carcinoma (HCC). Interfering with IRF5 inhibited the growth and tumorigenic ability of HCC cells. When studying the molecular mechanism, it was found that TRIM35 interacted with IRF5, promoting the ubiquitination and degradation of IRF5. In the clinical specimens of HCC, TRIM35 was negatively correlated with the expression of IRF5. These observations reveal the oncogenic function of IRF5 in the progression of HCC, suggesting that IRF5 is a promising target for the therapy of HCC.
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ROR1 ADCs in Clinical Trials MK-2140, NBE-002 & CS5001.pdf
1. Biopharma PEG https://www.biochempeg.com
ROR1 ADCs in Clinical Trials: MK-2140, NBE-002
& CS5001
Receptor tyrosine kinase-like orphan receptor 1 (ROR1) has gained increasing attention.
In recent years, Boehringer Ingelheim and Merck both added ROR1-directed
antibody-drug conjugates (ADCs) to their pipeline via acquisition, highlighting the
importance of ROR1 in oncology and its promising potential as an ADC target.
Here, we analyze the structural and functional features of ROR1 and explore the ROR1
ADC pipelines.
ROR1: Structure and Expression
Receptor tyrosine kinase-like orphan receptor 1 (ROR1) is a member of the ROR receptor
family, which contains two closely related type I transmembrane proteins, ROR1 and
ROR2. The ROR family belongs to the Wnt signaling pathway and is closely related to
MuSK (muscle-specific kinase) and Trk (tropomyosin) family receptors.
ROR1 consists of an extracellular region with one immunoglobulin (Ig), one frizzled (Fz)
and one kringle (Kr) domain and an intracellular region harboring a pseudokinase domain.
Figure 1. Schematic domain structure of ROR1. Source: Reference [1]
2. Biopharma PEG https://www.biochempeg.com
ROR1 can play an important role in a variety of physiological processes, including the
regulation of cell division, proliferation, migration, and chemotaxis, by mediating the
signaling of non-canonical Wnt pathways, especially Wnt5a. Wnt5a is a typical activator of
non-canonical Wnt signaling pathway, which is involved in the phosphorylation of NF-κB
subunit p65, activates NF-κB pathway in tumor cells, and promotes cell migration and
invasion, EMT, and cancer metastasis.
As a receptor for Wnt5a, ROR1 is involved in the activation of the tumor cell NF-κB
pathway, which is responsible for the inflammatory response and immune regulation, and
is constitutively activated in a wide range of tumor types. As shown in Figure 2, Wnt5a
activates the receptors ROR1 or FZD5, leading to activation of Dvl2/3 and
phosphorylation of Akt, which in turn promotes the phosphorylation of IKKα to activate the
IKK complex, an entity responsible for the degradation of IκBα and the phosphorylation of
the NF-κB subunit p65. Phosphorylated p65 is transferred to the nucleus to promote the
transcription and expression of target genes, including Wnt5a, whose secretion promotes
a new round of autonomic feedback loop. Activation of the ROR1/Akt/p65 pathway in the
autonomic feedback loop further promotes the secretion of pro-inflammatory factors (e.g.,
IL-6) and chemokines (e.g., CCL2).
Figure 2. The Wnt5a/NF-κB signaling pathway. Source: reference [3]
3. Biopharma PEG https://www.biochempeg.com
Role of ROR1 in Malignant Tumors
ROR1 is highly expressed during early embryonic development and is involved in the
regulation of cell division, proliferation and migration, and in the generation of organs such
as nerves, bones and blood vessels. Along with the process of fetal development, the
expression of ROR1 gradually decreases. In childhood and adult stages, ROR1
expression is low or absent in almost all normal tissues.
In contrast to normal tissues, ROR1 is highly expressed in a variety of cancers, including
hematological cancers such as chronic lymphocytic leukemia (CLL), mantle cell
lymphoma (MCL), and solid tumors (ovarian, breast, prostate, lung, melanoma, and
colorectal cancers, etc.).
Immunohistochemical staining showed high expression of ROR1 in pancreatic cancer
specimens, with positive staining localized in the cytoplasm as well as in the nucleus of
the cancer cells (Figures C and D); in normal pancreatic tissue samples, ROR1 was
expressed exclusively in pancreatic islet cells; ROR1 expression was also observed in the
stomach region (Figure J); and ROR1 was not detected in normal tissue samples from the
heart (Figure E), liver (Figure F), brain (Figure G), kidneys (Figure H) or lungs (Figure I).
Figure 3. Immunohistochemistry staining of human tissues. Source: reference [4]
4. Biopharma PEG https://www.biochempeg.com
In lung cancer, ROR1 is involved in the activation of c-Src and MET, leading to the
inhibition of apoptosis in tumor cells, and ROR1 has also been found to be a scaffolding
protein for cavin-1 and caveolin-1, which activate AKT in lung adenocarcinoma.
In breast cancer, ROR1 promotes activation of the PI3K/AKT pathway, and high ROR1
expression is associated with more severe disease progression. In conclusion, the
aberrant expression of ROR1 and associated pro-growth signaling events observed in
many types of malignant tumors make ROR1 an attractive therapeutic target for
anti-cancer drug development.
Advances in ROR1-targeted ADCs
Several companies are currently developing anti-cancer therapies targeting ROR1,
including monoclonal antibodies, antibody-drug conjugates (ADCs), bispecific antibodies,
and CAR-T therapies, as well as other therapeutic modalities. Among them, ADC drugs
are progressing faster and show good application prospects.
Name Company Indications Status
Zilovertamab vedotin
(MK2104, VLS-101)
Merck & Co (VelosBio)
B-cell lymphoma, DLBCL, breast
cancer, Chronic Lymphocytic
Leukemia, Mantle Cell Lymphoma,
Follicular Lymphoma,NSCLC, etc
Phase II/III
NBE-002
Boehringer Ingelheim
(NBE-Therapeutics AG)
Advanced Solid Tumor,Triple
Negative Breast Cancer
Phase II
LCB-71 (CS5001)
CStone Pharmaceuticals
Co. Ltd.
Advanced Solid Tumor, Advanced
Lymphoma
Phase I
huXBR1-402-G5-PNU
Boehringer Ingelheim
(NBE-Therapeutics AG)
Leukemia Preclinical
huXBR1-402-G5-PNU
NBE-Therapeutics AG, The
Scripps Research Institute,
The Ohio State University
Acute lymphoblastic leukemia,
chronic lymphocytic leukemia,
mantle
cell lymphoma
Preclinical
cirmtuzumab-ADC-7 VelosBio, Inc. Tumor Preclinical
ELN-11 Elasmogen Ltd. Tumor Preclinical
Table. ROP1 ADC under investigation
Zilovertamab vedotin (MK-2140,VLS-101)
MK-2140 is one of the fastest progressing ROR1 ADCs and was previously developed by
VelosBio, which was acquired by Merck in November 2020 for $2.75 billion in cash.
5. Biopharma PEG https://www.biochempeg.com
MK-2140 conjugates UC-961, a monoclonal antibody targeting ROR1, to Monomethyl
auristatin E (MMAE), a microtubule-targeting agent , via proteolytically cleavable linker mc
vc PAB. UC-961 is a humanized antibody that binds to the intradomain epitope of ROR1
with high affinity (Kd=2nM) and has direct cytotoxic activity against ROR1-positive tumor
cells by blocking the binding of Wnt5a to ROR1.
Due to the unique epitope recognized by UC-961, this antibody triggers significant
internalization of ROR1 upon binding, facilitating the delivery of a toxic payload
specifically to ROR1-positive tumor cells. MK-2140 has been shown to be effective at
inducing cell cycle arrest and apoptosis in an in vitro model, and effective at blocking
tumor growth in vivo in a xenograft model.
Figure 4. MK-2140 mechanism, source: Vaisitti Tiziana. Blood, 2021
An open-label, single-arm Phase II clinical trial (waveLINE-004, NCT05144841) enrolling
40 patients who had received at least second-line therapy (as of 2022.11.16) was
designed to evaluate the efficacy and safety of MK-2140 (2.5 mg/kg) monotherapy for the
treatment of patients with relapsed or refractory diffuse large B-cell lymphoma (R/R
6. Biopharma PEG https://www.biochempeg.com
DLBCL). The results showed that after treatment with MK-2140, patients had an ORR of
30% (6/20), including 2 CRs and 4 PRs.
In a phase I study of hematologic malignancies (NCT03833180), MK-2140 was well
tolerated and effective in patients with advanced mantle cell lymphoma (MCL) or diffuse
large B-cell lymphoma (DLBCL), with an ORR of 47% (7/15) in the MCL group, including 3
CRs and 4 PRs, and an ORR of 80% (4/5) in the DLBCL group, including 2 CRs and 2
PRs.
A Phase 2 study (NCT04504916) in patients with solid tumors, including breast and lung
cancer, is also currently underway.
NBE-002
On December 11, 2020, Boehringer Ingelheim announced the acquisition of all shares of
NBE-Therapeutics for €1.18 billion ($1.43 billion, including clinical and regulatory
milestone payments), taking the company's unique iADC technology platform and
corresponding pipeline.
NBE-002, NBE-Therapeutics' fastest progressing ADC drug targeting ROR1, is produced
by enzymatic conjugation of a humanized antibody (huXBR1-402) to the anthracycline
PNU-159682 via sortasea A-mediated site-specific transpeptidation reaction at a
predefined drug-antibody ratio (DAR), resulting in a purer and more homogenous product
with more stable biophysical and pharmacokinetic profiles. NBE-002 not only has direct
anti-tumor activity, but also increases T-cell infiltration into tumors and converts "cold"
tumors into "hot" tumors, causing them to respond to checkpoint inhibitors against PD-1
and CTLA-4.
Figure 5. NBE-002 pipeline, source: https://nbe-therapeutics.com/
7. Biopharma PEG https://www.biochempeg.com
NBE-002 is currently in a Phase 1/2 clinical trial (NCT04441099) to evaluate safety and
tolerability in patients with advanced solid tumors, particularly triple-negative breast
cancer.
LCB71 (CS5001)
LCB71 is being developed by two South Korean biopharmaceutical companies,
LegoChem Biosciences and ABL Bio. In October 2020, CStone Pharmaceuticals
introduced LCB71 for an upfront payment of $10 million and milestone payments of up to
$353 million and additional tiered royalties. Under the agreement, CStone obtains the
exclusive global right to lead development and commercialization of LCB71 outside the
Republic of Korea.
LCB71 (CS5001) is an ADC consisting of a human monoclonal antibody targeting ROR1.
This ADC drug is uniquely designed to incorporate a unique β-glucuronide linker and
a pyrrolobenzodiazepine (PBD) prodrug through site-specific conjugation technology
known as ConjuALL™. Only after reaching the tumor, the linker and prodrug are cleaved
to release the PBD toxin, resulting in lethal DNA cross-links in cancer cells. The use of the
linker plus PBD prodrug effectively helps addressing the toxicity problem associated with
traditional PBD payloads, leading to a better safety profile.
Figure 6. CS5001, source: https://www.cstonepharma.com/en/
8. Biopharma PEG https://www.biochempeg.com
CS5001 is currently in Phase I clinical trial in the United States, Australia, and
mainland China, with preliminary data anticipated before the end of 2023. CS5001
demonstrated significant anti-tumor activity in both Jeko-1 (mantle cell lymphoma) and
MDA-MB-231 (breast cancer) xenograft tumor models in a dose-dependent manner. It is
a promising drug candidate with precision therapeutic potential in both hematological
tumors and malignant solid tumors with high ROR1 expression.
Conclusion
ROR1 is widely expressed in various solid and hematological tumor cells, making it an
attractive and important target for ADC drug development. Due to the unique site-specific
conjugation strategy, both NBE-002 and LCB71 are homogeneous ADCs with a defined
DAR, which facilitates manufacturing. In addition, the stable linkers in both ADCs provide
a better pharmacokinetic profile. Although the product of VLS-101 is not homogeneous, a
phase 1 study has demonstrated safety and clinical efficacy in patients with MCL and
DLBCL, and it is the leading anti-ROR1 ADC currently in a phase 2 clinical trial.
Regardless, all 3 anti-ROR1 ADCs look very promising, and the 3 recent major
commercial deals may facilitate the rapid development of multiple therapeutic modalities
targeting ROR1.
References:
[1] Zhao Y, Zhang D, Guo Y, Lu B, Zhao ZJ, Xu X, Chen Y. Tyrosine Kinase ROR1 as a
Target for Anti-Cancer Therapies. Front Oncol. 2021 May 28;11:680834. doi:
10.3389/fonc.2021.680834. PMID: 34123850; PMCID: PMC8193947.
[2] Peng H. Perspectives on the development of antibody-drug conjugates targeting
ROR1 for hematological and solid cancers. Antib Ther. 2021;4(4):222-227. Published
2021 Oct 15. doi:10.1093/abt/tbab023
[3] Lopez-Bergami, P., Barbero, G. The emerging role of Wnt5a in the promotion of a
pro-inflammatory and immunosuppressive tumor microenvironment. Cancer Metastasis
Rev 39, 933–952 (2020). https://doi.org/10.1007/s10555-020-09878-7
[4] Gohil SH, Paredes-Moscosso SR, Harrasser M, Vezzalini M, Scarpa A, Morris E,
9. Biopharma PEG https://www.biochempeg.com
Davidoff AM, Sorio C, Nathwani AC, Della Peruta M. An ROR1 bi-specific T-cell engager
provides effective targeting and cytotoxicity against a range of solid tumors.
Oncoimmunology. 2017 May 17;6(7):e1326437. doi: 10.1080/2162402X.2017.1326437.
PMID: 28811962; PMCID: PMC5543882.
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