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Head & Neck Cancers, ATR, no-mutation

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Expand Collapse Head & Neck Cancers  - General Description This year about 52,000 people in the U.S. will be told by a doctor that they have cancer of the head and neck. Approximately 70% of these new patients will be men. However, about 265,000 Americans remain alive today after having been diagnosed with head & neck cancer.

Head and neck cancers develop inside the mouth (in the oral cavity), nose (nasal cavity), or the tube (pharynx) that runs from the back of the nose to the top of the windpipe (trachea) and the top of the tube that goes to the stomach (esophagus). Cancers that begins in the lips, salivary glands, throat or voice box (larynx) are also classified as head and neck cancer. However, cancers of the esophagus, eye, brain, and thyroid gland usually aren't regarded as head and neck cancers, and neither are cancers of the skin, muscles, or bones of the head and neck. Head and neck cancers usually begin in squamous cells and therefore are called squamous cell carcinomas. The FDA has approved the targeted therapy cetuximab (Erbitux) for treatment of patients with squamous cell carcinoma of the head and neck.

Head and neck cancer (and other tumors) can spread (metastasize) from the place where it started (the primary tumor) in 3 ways. First, it can invade the normal tissue surrounding it. Second, cancer cells can enter the lymph system and travel through lymph vessels to distant parts of the body. Third, the cancer cells can get into the bloodstream and go to other places in the body. In these distant places, the cancer cells cause secondary tumors to grow. To find out whether the cancer has entered the lymph system, a surgeon removes all or part of a node near the primary tumor and a pathologist looks at it through a microscope to see if cancer cells are present. Several kinds of imaging can also be performed to determine if the cancer has spread. These include MRI and CT scans.

Despite significant improvements in the treatment of head & neck cancers, novel therapies and treatment strategies are needed.

Source: National Cancer Institute, 2012
An estimated 644,000 new cases of head and neck cancer are diagnosed each year worldwide, posing the sixth leading cause of cancer death. The American Cancer Society projected 39,400 new head and neck cancer diagnoses and 7,900 cancer deaths in the U.S. in 2009. In Europe, the projected incidence for 2008 was 132,300 and the mortality was 62,800. The estimated annual incidence of head and neck cancers is 2-4-fold higher among men than women.

More than 95% of head and neck cancers are of squamous cell histology (SCCHN) and originate in the mucosal lining of the upper aerodigestive tract. Anatomic sites include the lip/oral cavity, nasopharynx, oropharynx, hypopharynx and larynx. Common risk factors include tobacco use (smoking and/or chewing) and alcohol consumption, with a suggested synergistic effect. Less common risk factors include chewing of betel nuts (a common practice in some parts of Asia) and occupational exposures. Infection with the oncogenic human papillomavirus (HPV) has been identified as a distinct and rising risk factor, particularly among patients with squamous cell carcinoma of the oropharynx, specifically tonsils and the base of tongue. The incidence of SCCHN has increased steadily during the last several decades, whereas the incidence of tobacco-associated SCCHN has decreased, to the point where the incidence of HPV-associated and non-HPV-associated cancers is nearly equivalent. HPV status has been shown to strongly predict outcomes in patients with locally or regionally advanced oropharynx squamous cell carcinoma, but the prognostic impact of HPV in recurrent/metastatic SCCHN is currently less well understood.

Molecular hallmarks of SCCHN that have been identified as key drivers over the past decade include gene mutations in TP53, CDKN2A, PIK3CA, PTEN and HRAS. Recent investigations using high-throughput gene sequencing also found mutations in other cell differentiation-related genes, such as NOTCH1, NOTCH2, NOTCH3 and TP63, suggesting that deregulation of the terminal differentiation program is critical for squamous cancer development.

The epidermal growth factor receptor (EGFR) and its downstream molecular pathways are of particular importance in SCCHN. EGFR is overexpressed in up to 90% of all SCCHN. High expression levels of EGFR and transforming growth factor (TGF, a ligand of EGFR), as well as EGFR gene amplification, has been associated with increased resistance to treatment and poorer clinical outcome, including decreased disease-free and overall survival.

Therapeutic options and treatment decisions at first diagnosis are dependent on disease stage. For early-stage and locally advanced disease (the majority of new
cases), therapy is tailored to the primary site of disease, feasibility of organ preservation and prognosis and functional outcomes following therapy. Despite aggressive treatment, only 35% to 55% of patients who present with locally advanced SCCHN remain alive and free of disease 3 years after standard curative treatment. Between 30-40% of patients develop loco-regional recurrences, with distant metastases occurring in 20-30% of cases. The majority of recurrences appear within 2 years of initial treatment. An additional 10-20% of patients have evidence of distant metastases at the time of first diagnosis.

For patients with recurrent/metastatic SCCHN who are considered incurable with surgery or radiotherapy, first-line palliative treatment options include platinum agents, taxanes, methotrexate, 5-fluorouracil and cetuximab. Even with combination regimens, objective radiographic responses are achieved in fewer than 40% of patients in most large studies. Patients with disease progression on platinum-based therapy have limited treatment options and a poor prognosis. In these patients, overall response to second-line cytotoxic therapy has been 3%. Poor survival at this stage is related to the development of metastases and poor local disease control.

Source: National Cancer Institute, 2012
This year about 52,000 people in the U.S. will be told by a doctor that they have cancer of the head and neck. Approximately 70% of these new patients will be men. However, about 265,000 Americans remain alive today after having been diagnosed with head & neck cancer.

Head and neck cancers develop inside the mouth (in the oral cavity), nose (nasal cavity), or the tube (pharynx) that runs from the back of the nose to the top of the windpipe (trachea) and the top of the tube that goes to the stomach (esophagus). Cancers that begins in the lips, salivary glands, throat or voice box (larynx) are also classified as head and neck cancer. However, cancers of the esophagus, eye, brain, and thyroid gland usually aren't regarded as head and neck cancers, and neither are cancers of the skin, muscles, or bones of the head and neck. Head and neck cancers usually begin in squamous cells and therefore are called squamous cell carcinomas. The FDA has approved the targeted therapy cetuximab (Erbitux) for treatment of patients with squamous cell carcinoma of the head and neck.

Head and neck cancer (and other tumors) can spread (metastasize) from the place where it started (the primary tumor) in 3 ways. First, it can invade the normal tissue surrounding it. Second, cancer cells can enter the lymph system and travel through lymph vessels to distant parts of the body. Third, the cancer cells can get into the bloodstream and go to other places in the body. In these distant places, the cancer cells cause secondary tumors to grow. To find out whether the cancer has entered the lymph system, a surgeon removes all or part of a node near the primary tumor and a pathologist looks at it through a microscope to see if cancer cells are present. Several kinds of imaging can also be performed to determine if the cancer has spread. These include MRI and CT scans.

Despite significant improvements in the treatment of head & neck cancers, novel therapies and treatment strategies are needed.

Source: National Cancer Institute, 2012
An estimated 644,000 new cases of head and neck cancer are diagnosed each year worldwide, posing the sixth leading cause of cancer death. The American Cancer Society projected 39,400 new head and neck cancer diagnoses and 7,900 cancer deaths in the U.S. in 2009. In Europe, the projected incidence for 2008 was 132,300 and the mortality was 62,800. The estimated annual incidence of head and neck cancers is 2-4-fold higher among men than women.

More than 95% of head and neck cancers are of squamous cell histology (SCCHN) and originate in the mucosal lining of the upper aerodigestive tract. Anatomic sites include the lip/oral cavity, nasopharynx, oropharynx, hypopharynx and larynx. Common risk factors include tobacco use (smoking and/or chewing) and alcohol consumption, with a suggested synergistic effect. Less common risk factors include chewing of betel nuts (a common practice in some parts of Asia) and occupational exposures. Infection with the oncogenic human papillomavirus (HPV) has been identified as a distinct and rising risk factor, particularly among patients with squamous cell carcinoma of the oropharynx, specifically tonsils and the base of tongue. The incidence of SCCHN has increased steadily during the last several decades, whereas the incidence of tobacco-associated SCCHN has decreased, to the point where the incidence of HPV-associated and non-HPV-associated cancers is nearly equivalent. HPV status has been shown to strongly predict outcomes in patients with locally or regionally advanced oropharynx squamous cell carcinoma, but the prognostic impact of HPV in recurrent/metastatic SCCHN is currently less well understood.

Molecular hallmarks of SCCHN that have been identified as key drivers over the past decade include gene mutations in TP53, CDKN2A, PIK3CA, PTEN and HRAS. Recent investigations using high-throughput gene sequencing also found mutations in other cell differentiation-related genes, such as NOTCH1, NOTCH2, NOTCH3 and TP63, suggesting that deregulation of the terminal differentiation program is critical for squamous cancer development.

The epidermal growth factor receptor (EGFR) and its downstream molecular pathways are of particular importance in SCCHN. EGFR is overexpressed in up to 90% of all SCCHN. High expression levels of EGFR and transforming growth factor (TGF, a ligand of EGFR), as well as EGFR gene amplification, has been associated with increased resistance to treatment and poorer clinical outcome, including decreased disease-free and overall survival.

Therapeutic options and treatment decisions at first diagnosis are dependent on disease stage. For early-stage and locally advanced disease (the majority of new
cases), therapy is tailored to the primary site of disease, feasibility of organ preservation and prognosis and functional outcomes following therapy. Despite aggressive treatment, only 35% to 55% of patients who present with locally advanced SCCHN remain alive and free of disease 3 years after standard curative treatment. Between 30-40% of patients develop loco-regional recurrences, with distant metastases occurring in 20-30% of cases. The majority of recurrences appear within 2 years of initial treatment. An additional 10-20% of patients have evidence of distant metastases at the time of first diagnosis.

For patients with recurrent/metastatic SCCHN who are considered incurable with surgery or radiotherapy, first-line palliative treatment options include platinum agents, taxanes, methotrexate, 5-fluorouracil and cetuximab. Even with combination regimens, objective radiographic responses are achieved in fewer than 40% of patients in most large studies. Patients with disease progression on platinum-based therapy have limited treatment options and a poor prognosis. In these patients, overall response to second-line cytotoxic therapy has been 3%. Poor survival at this stage is related to the development of metastases and poor local disease control.

Source: National Cancer Institute, 2012
Expand Collapse ATR  - General Description
CLICK IMAGE FOR MORE INFORMATION
The protein encoded by ATR is a serine/threonine kinase and DNA damage sensor, activating cell cycle checkpoint signaling and causing a pause in the cell cycle following DNA replication stress or damage. The activated protein can phosphorylate and activate several important proteins that are involved in the inhibition of DNA replication and cell division, which are critical for DNA repair.

The maintenance of intact, correctly sequenced DNA is vital to the life of a cell. If there are mistakes made in replicating DNA before cell division, subsequent daughter cells will have inaccurate or damaged DNA, and may either die or carry mutations that can contribute to the development of cancer. For this reason, cells have evolved multiple pathways to repair mistakes in-or damage to- DNA. The specific repair pathway used by the cell depends on the type of DNA damage that has occurred. The types of DNA repair that we are focusing on relate directly to cancer. These involve a break in BOTH strands of DNA, which can be the result of ionizing radiation or other DNA damaging agents. This type of DNA damage is called Double Strand Breaks (DSB's). There are two main pathways used by cells to repair DSB's in DNA, one is Homologous Recombination (HR), the other is Non-Homologous End Joining (NHEJ). This page of our website focuses on the HR pathway (there is a separate web page for NHEJ repair if you select PKcs from the gene list when you sign on to this page).

Many proteins are involved in the complex HR pathway to repair DSB's in DNA. There is a graphic above that depicts the HR pathway (if you click on the graphic, it will enlarge and become a bit easier to follow). While complicated, the DSB at the top right of the graphic is acted upon by a series of proteins in the circle of steps shown that ultimately lead to the complete and accurate repair of the DSB in the DNA.

Some of the proteins involved in the HR DSB repair pathway are MRE11, NBS1, RAD50. These three proteins make up the MRN complex. This complex detects DSB's in the DNA. Once the DSB is found by the MRN complex, the MRN complex functions with BRCA1 and CtIP to resect the DSB’s to form single stranded DNA “tails”. Meanwhile, DSB's also activate the ATM protein, which in turn acts upon CHK2 to activate it, as well as directly activating the tumor suppressor TP53. TP53 can cause cell cycle delay, giving the cell time to repair DNA breaks or mistakes before the cell cycle leading to division resumes. In the next step, RPA binds to the single stranded DNA "tails" that have been created by BRCA1 and CtIP in conjunction with the MRN. The binding of RPA activates another protein called ATR. ATR has many important functions, including activating CHK1, which can cause cell cycle delay giving cells time to repair DNA. ATR also regulates BRCA1 which recruits a bound group of proteins including PALB2/BRCA2/RAD51. In the next step, RAD51 displaces the RPA that is on the single stranded DNA, with the involvement of BRCA2/PALB2 and RAD51c. BRCA1/BARD1 helps RAD51 coated single stranded DNA invade double stranded DNA with homologous sequences to form a DNA repair loop. With the help of DNA polymerases, the repair loop creates the opportunity to use the intact homologous DNA as a template to correctly repair DSB’s. Enzymes called ligases reconnect the ends of the DNA, leading to complete and accurate repair of the DSB in DNA.

After studying familial cancer syndromes, germline or inherited BRCA1 and BRCA2 were identified a while ago as proteins that when altered by mutation, cause certain cancers. Some BRCA1 and BRCA2 genes become mutated somatically, meaning in a non-inherited way. When either gene is mutated, the resulting protein cannot perform its role in DNA repair correctly. This turns out to be true for other proteins in the HR pathway as well. Recently, scientists have found mutations in many of the other genes that encode the proteins involved in the HR pathway. Mutations in HR pathway members include MRE11, NBS1, RAD50, ATM, CHK2, BRCA1, PALB2, RAD51, BRCA2, BARD1, and RAD51c (these are depicted in red in the above graphic). This remarkable number of mutations in proteins involved in the DNA repair pathway found in cancer highlights how important the HR DSB DNA repair pathway is in cells. The mutations in HR pathway proteins result in proteins that do not function properly in their role in DNA repair. Without proper function of the proteins involved in DNA repair, DNA mistakes or breaks are not properly repaired, and the damaged DNA contributes to the development of cancer.

ATR is only rarely mutated in cancer, however, the frequent mutations in ATM result in cells that are completely reliant on the ATR pathway to repair DSB's in the DNA. This has therapeutic implications for treatment of tumors that have mutations in the HR DNA repair pathway.

Testing for mutations in the many genes/proteins involved in DNA repair discussed above is available in the MGH genetics lab. Treatment as well as clinical trials studying new drugs that target defects in these proteins-including ATR- are available at the MGH Cancer Center.

The protein encoded by ATR is a serine/threonine kinase and DNA damage sensor, activating cell cycle checkpoint signaling and causing a pause in the cell cycle following DNA replication stress or damage. The activated protein can phosphorylate and activate several important proteins that are involved in the inhibition of DNA replication and cell division, which are critical for DNA repair.

The maintenance of intact, correctly sequenced DNA is vital to the life of a cell. If there are mistakes made in replicating DNA before cell division, subsequent daughter cells will have inaccurate or damaged DNA, and may either die or carry mutations that can contribute to the development of cancer. For this reason, cells have evolved multiple pathways to repair mistakes in-or damage to- DNA. The specific repair pathway used by the cell depends on the type of DNA damage that has occurred. The types of DNA repair that we are focusing on relate directly to cancer. These involve a break in BOTH strands of DNA, which can be the result of ionizing radiation or other DNA damaging agents. This type of DNA damage is called Double Strand Breaks (DSB's). There are two main pathways used by cells to repair DSB's in DNA, one is Homologous Recombination (HR), the other is Non-Homologous End Joining (NHEJ). This page of our website focuses on the HR pathway (there is a separate web page for NHEJ repair if you select PKcs from the gene list when you sign on to this page).

Many proteins are involved in the complex HR pathway to repair DSB's in DNA. There is a graphic above that depicts the HR pathway (if you click on the graphic, it will enlarge and become a bit easier to follow). While complicated, the DSB at the top right of the graphic is acted upon by a series of proteins in the circle of steps shown that ultimately lead to the complete and accurate repair of the DSB in the DNA.

Some of the proteins involved in the HR DSB repair pathway are MRE11, NBS1, RAD50. These three proteins make up the MRN complex. This complex detects DSB's in the DNA. Once the DSB is found by the MRN complex, the MRN complex functions with BRCA1 and CtIP to resect the DSB’s to form single stranded DNA “tails”. Meanwhile, DSB's also activate the ATM protein, which in turn acts upon CHK2 to activate it, as well as directly activating the tumor suppressor TP53. TP53 can cause cell cycle delay, giving the cell time to repair DNA breaks or mistakes before the cell cycle leading to division resumes. In the next step, RPA binds to the single stranded DNA "tails" that have been created by BRCA1 and CtIP in conjunction with the MRN. The binding of RPA activates another protein called ATR. ATR has many important functions, including activating CHK1, which can cause cell cycle delay giving cells time to repair DNA. ATR also regulates BRCA1 which recruits a bound group of proteins including PALB2/BRCA2/RAD51. In the next step, RAD51 displaces the RPA that is on the single stranded DNA, with the involvement of BRCA2/PALB2 and RAD51c. BRCA1/BARD1 helps RAD51 coated single stranded DNA invade double stranded DNA with homologous sequences to form a DNA repair loop. With the help of DNA polymerases, the repair loop creates the opportunity to use the intact homologous DNA as a template to correctly repair DSB’s. Enzymes called ligases reconnect the ends of the DNA, leading to complete and accurate repair of the DSB in DNA.

After studying familial cancer syndromes, germline or inherited BRCA1 and BRCA2 were identified a while ago as proteins that when altered by mutation, cause certain cancers. Some BRCA1 and BRCA2 genes become mutated somatically, meaning in a non-inherited way. When either gene is mutated, the resulting protein cannot perform its role in DNA repair correctly. This turns out to be true for other proteins in the HR pathway as well. Recently, scientists have found mutations in many of the other genes that encode the proteins involved in the HR pathway. Mutations in HR pathway members include MRE11, NBS1, RAD50, ATM, CHK2, BRCA1, PALB2, RAD51, BRCA2, BARD1, and RAD51c (these are depicted in red in the above graphic). This remarkable number of mutations in proteins involved in the DNA repair pathway found in cancer highlights how important the HR DSB DNA repair pathway is in cells. The mutations in HR pathway proteins result in proteins that do not function properly in their role in DNA repair. Without proper function of the proteins involved in DNA repair, DNA mistakes or breaks are not properly repaired, and the damaged DNA contributes to the development of cancer.

ATR is only rarely mutated in cancer, however, the frequent mutations in ATM result in cells that are completely reliant on the ATR pathway to repair DSB's in the DNA. This has therapeutic implications for treatment of tumors that have mutations in the HR DNA repair pathway.

Testing for mutations in the many genes/proteins involved in DNA repair discussed above is available in the MGH genetics lab. Treatment as well as clinical trials studying new drugs that target defects in these proteins-including ATR- are available at the MGH Cancer Center.



PubMed ID's
27617969, 24003211, PMC2988877
Expand Collapse no-mutation  in ATR
Mutations in the ATR gene are extremely rare in cancers. In fact, the ATR protein and its role in causing cell cycle delay through activating the protein CHK1 is a key pathway. Cell cycle delay induced by CHK1 gives the cell time to repair DSB's in the DNA, thereby acting as a tumor suppressor. When other proteins in the HR DNA pathway are mutated (see red proteins in the graphic above), ATR is the only option for DNA repair left to cells. This is why ATR inhibitors and other therapies can be effective treatments inducing death to tumor-cells.
Mutations in the ATR gene are extremely rare in cancers. In fact, the ATR protein and its role in causing cell cycle delay through activating the protein CHK1 is a key pathway. Cell cycle delay induced by CHK1 gives the cell time to repair DSB's in the DNA, thereby acting as a tumor suppressor. When other proteins in the HR DNA pathway are mutated (see red proteins in the graphic above), ATR is the only option for DNA repair left to cells. This is why ATR inhibitors and other therapies can be effective treatments inducing death to tumor-cells.

Alterations in the gene encoding ATR are not found in cancers of the head and neck. ATR is an important protein in the DNA repair pathway. ATR controls a signaling pathway in the cell by activating CHK1, which causes a delay in the cell cycle (see graphic above). Without this delay, cells would not have time to repair broken or damaged DNA. The accumulation of damaged DNA in the cell can lead to cancer.

ATR has become an important protein to inhibit with drugs in cancer. Cancer cells often have genetic alterations in other proteins in the DNA repair pathway (see red proteins in graphic above). If the ATM protein is mutated and unable to cause cell cycle arrest for DNA repair, then ATR is the only option for cancer cells to use to delay the cell cycle and repair DNA. Drugs targeting ATR block this pathway, leaving cancer cells no way to pause the cell cycle to achieve DNA repair. The tumor cells die as the result of accumulated damaged or broken DNA.

Alterations in the gene encoding ATR are not found in cancers of the head and neck. ATR is an important protein in the DNA repair pathway. ATR controls a signaling pathway in the cell by activating CHK1, which causes a delay in the cell cycle (see graphic above). Without this delay, cells would not have time to repair broken or damaged DNA. The accumulation of damaged DNA in the cell can lead to cancer.

ATR has become an important protein to inhibit with drugs in cancer. Cancer cells often have genetic alterations in other proteins in the DNA repair pathway (see red proteins in graphic above). If the ATM protein is mutated and unable to cause cell cycle arrest for DNA repair, then ATR is the only option for cancer cells to use to delay the cell cycle and repair DNA. Drugs targeting ATR block this pathway, leaving cancer cells no way to pause the cell cycle to achieve DNA repair. The tumor cells die as the result of accumulated damaged or broken DNA.

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Your Matched Clinical Trials

Trial Matches: (D) - Disease, (G) - Gene, (M) - Mutation
Trial Status: Showing Results: 1-10 of 40 Per Page:
1234Next »
Protocol # Title Location Status Match
NCT02099058 A Phase 1/1b Study With ABBV-399, an Antibody Drug Conjugate, in Subjects With Advanced Solid Cancer Tumors A Phase 1/1b Study With ABBV-399, an Antibody Drug Conjugate, in Subjects With Advanced Solid Cancer Tumors MGH Open D
NCT03019003 A Phase IB/II Study With Azacitidine, Durvalumab, and Tremelimumab in Recurrent and/or Metastatic Head and Neck Cancer Patients A Phase IB/II Study With Azacitidine, Durvalumab, and Tremelimumab in Recurrent and/or Metastatic Head and Neck Cancer Patients MGH Open D
NCT02578641 A Phase III Trial Evaluating Chemotherapy and Immunotherapy for Advanced Nasopharyngeal Carcinoma (NPC) Patients A Phase III Trial Evaluating Chemotherapy and Immunotherapy for Advanced Nasopharyngeal Carcinoma (NPC) Patients MGH Open D
NCT02988960 A Study of ABBV-927, an Immunotherapy, in Participants With Advanced Solid Tumors A Study of ABBV-927, an Immunotherapy, in Participants With Advanced Solid Tumors MGH Open D
NCT01714739 A Study of an Anti-KIR Antibody Lirilumab in Combination With an Anti-PD1 Antibody Nivolumab and Nivolumab Plus an Anti-CTLA-4 Ipilimumab Antibody in Patients With Advanced Solid Tumors A Study of an Anti-KIR Antibody Lirilumab in Combination With an Anti-PD1 Antibody Nivolumab and Nivolumab Plus an Anti-CTLA-4 Ipilimumab Antibody in Patients With Advanced Solid Tumors MGH Open D
NCT02880371 A Study of ARRY-382 in Combination With Pembrolizumab for the Treatment of Patients With Advanced Solid Tumors A Study of ARRY-382 in Combination With Pembrolizumab for the Treatment of Patients With Advanced Solid Tumors MGH Open D
NCT02467361 A Study of BBI608 Administered in Combination With Immune Checkpoint Inhibitors in Adult Patients With Advanced Cancers A Study of BBI608 Administered in Combination With Immune Checkpoint Inhibitors in Adult Patients With Advanced Cancers MGH Open D
NCT00585195 A Study Of Oral PF-02341066, A C-Met/Hepatocyte Growth Factor Tyrosine Kinase Inhibitor, In Patients With Advanced Cancer A Study Of Oral PF-02341066, A C-Met/Hepatocyte Growth Factor Tyrosine Kinase Inhibitor, In Patients With Advanced Cancer MGH Open D
NCT02834247 A Study of TAK-659 in Combination With Nivolumab in Participants With Advanced Solid Tumors A Study of TAK-659 in Combination With Nivolumab in Participants With Advanced Solid Tumors MGH Open D
NCT02253992 An Investigational Immuno-therapy Study to Determine the Safety of Urelumab Given in Combination With Nivolumab in Solid Tumors and B-cell Non-Hodgkin's Lymphoma An Investigational Immuno-therapy Study to Determine the Safety of Urelumab Given in Combination With Nivolumab in Solid Tumors and B-cell Non-Hodgkin's Lymphoma MGH Open D
Trial Status: Showing Results: 1-10 of 40 Per Page:
1234Next »
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