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Chitnis T, Kaskow BJ, Case J, Hanus K, Li Z, Varghese JF, Healy BC, Gauthier C, Saraceno TJ, Saxena S, Lokhande H, Moreira TG, Zurawski J, Roditi RE, Bergmark RW, Giovannoni F, Torti MF, Li Z, Quintana F, Clementi WA, Shailubhai K, Weiner HL, Baecher-Allan CM. Nasal administration of anti-CD3 monoclonal antibody modulates effector CD8+ T cell function and induces a regulatory response in T cells in human subjects. Front Immunol 2022; 13:956907. [PMID: 36505477 PMCID: PMC9727230 DOI: 10.3389/fimmu.2022.956907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 09/29/2022] [Indexed: 11/24/2022] Open
Abstract
Background Parenteral anti-CD3 Mab (OKT3) has been used to treat transplant rejection and parental administration of a humanized anti-CD3 Mab (Teplizumab) showed positive effects in diabetes. Nasal administration of anti-CD3 Mab has not been carried out in humans. Nasal anti-CD3 Mab suppresses autoimmune diseases and central nervous system (CNS) inflammation in animal models. We investigated the safety and immune effects of a fully humanized, previously uncharacterized nasal anti-CD3 Mab (Foralumab) in humans and its in vitro stimulatory properties. Methods In vitro, Foralumab were compared to UCHT1 anti-human CD3 mAb. For human administration, 27 healthy volunteers (9 per group) received nasal Foralumab or placebo at a dose of 10ug, 50ug, or 250ug daily for 5 days. Safety was assessed and immune parameters measured on day 1 (pre-treatment), 7, 14, and 30 by FACS and by scRNAseq. Results In vitro, Foralumab preferentially induced CD8+ T cell stimulation, reduced CD4+ T cell proliferation and lowered expression of IFNg, IL-17 and TNFa. Foralumab induced LAP, TIGIT, and KLRG1 immune checkpoint molecules on CD8+ and CD4+ T cells in a mechanism independent of CD8 T cells. In vivo, nasal Foralumab did not modulate CD3 from the T cell surface at any dose. Immune effects were primarily observed at the 50ug dose and consisted of reduction of CD8+ effector memory cells, an increase in naive CD8+ and CD4+ T cells, and reduced CD8+ T cell granzyme B and perforin expression. Differentially expressed genes observed by scRNAseq in CD8+ and CD4+ populations promoted survival and were anti-inflammatory. In the CD8+ TEMRA population there was induction of TIGIT, TGFB1 and KIR3DL2, indicative of a regulatory phenotype. In the memory CD4+ population, there was induction of CTLA4, KLRG1, and TGFB whereas there was an induction of TGF-B1 in naïve CD4+ T cells. In monocytes, there was induction of genes (HLA-DP, HLA-DQ) that promote a less inflammatory immune response. No side effects were observed, and no subjects developed human anti-mouse antibodies. Conclusion These findings demonstrate that nasal Foralumab is safe and immunologically active in humans and presents a new avenue for the treatment of autoimmune and CNS diseases.
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Affiliation(s)
- Tanuja Chitnis
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States,*Correspondence: Tanuja Chitnis, ; Clare M. Baecher-Allan,
| | - Belinda J. Kaskow
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Junning Case
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Katherine Hanus
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Zhenhua Li
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Johnna F. Varghese
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Brian C. Healy
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Christian Gauthier
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Taylor J. Saraceno
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Shrishti Saxena
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Hrishikesh Lokhande
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Thais G. Moreira
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Jonathan Zurawski
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Rachel E. Roditi
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States,Department of Surgery, Brigham and Women’s Hospital, Boston, MA, United States
| | - Regan W. Bergmark
- Department of Otolaryngology-Head and Neck Surgery, Harvard Medical School, Boston, MA, United States,Department of Surgery, Brigham and Women’s Hospital, Boston, MA, United States
| | - Federico Giovannoni
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Maria F. Torti
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Zhaorong Li
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Francisco Quintana
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | | | | | - Howard L. Weiner
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States
| | - Clare M. Baecher-Allan
- Harvard Medical School, Boston, MA, United States,Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital, Boston, MA, United States,*Correspondence: Tanuja Chitnis, ; Clare M. Baecher-Allan,
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Moreira TG, Matos KTF, De Paula GS, Santana TMM, Da Mata RG, Pansera FC, Cortina AS, Spinola MG, Baecher-Allan CM, Keppeke GD, Jacob J, Palejwala V, Chen K, Izzy S, Healey BC, Rezende RM, Dedivitis RA, Shailubhai K, Weiner HL. Corrigendum: Nasal Administration of Anti-CD3 Monoclonal Antibody (Foralumab) Reduces Lung Inflammation and Blood Inflammatory Biomarkers in Mild to Moderate COVID-19 Patients: A Pilot Study. Front Immunol 2022; 12:815812. [PMID: 35095916 PMCID: PMC8790742 DOI: 10.3389/fimmu.2021.815812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 12/23/2021] [Indexed: 11/25/2022] Open
Affiliation(s)
- Thais G Moreira
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Kimble T F Matos
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | | | | | | | - Marcelle G Spinola
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Clare M Baecher-Allan
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Gerson D Keppeke
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jules Jacob
- Tiziana LifeScience, Doylestown, PA, United States
| | | | - Karen Chen
- Department of Radiology, Boston Children's Hospital, Harvard Medical School, Boston, MA, United States
| | - Saef Izzy
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Brian C Healey
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Rafael M Rezende
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | | | | | - Howard L Weiner
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
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3
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Moreira TG, Matos KTF, De Paula GS, Santana TMM, Da Mata RG, Pansera FC, Cortina AS, Spinola MG, Keppeke GD, Jacob J, Palejwala V, Chen K, Izzy S, Healey BC, Rezende RM, Dedivitis RA, Shailubhai K, Weiner HL. Nasal Administration of Anti-CD3 Monoclonal Antibody (Foralumab) Reduces Lung Inflammation and Blood Inflammatory Biomarkers in Mild to Moderate COVID-19 Patients: A Pilot Study. Front Immunol 2021; 12:709861. [PMID: 34475873 PMCID: PMC8406802 DOI: 10.3389/fimmu.2021.709861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/28/2021] [Indexed: 01/18/2023] Open
Abstract
Background Immune hyperactivity is an important contributing factor to the morbidity and mortality of COVID-19 infection. Nasal administration of anti-CD3 monoclonal antibody downregulates hyperactive immune responses in animal models of autoimmunity through its immunomodulatory properties. We performed a randomized pilot study of fully-human nasal anti-CD3 (Foralumab) in patients with mild to moderate COVID-19 to determine if its immunomodulatory properties had ameliorating effects on disease. Methods Thirty-nine outpatients with mild to moderate COVID-19 were recruited at Santa Casa de Misericordia de Santos in Sao Paulo State, Brazil. Patients were randomized to three cohorts: 1) Control, no Foralumab (n=16); 2) Nasal Foralumab (100ug/day) given for 10 consecutive days with 6 mg dexamethasone given on days 1-3 (n=11); and 3) Nasal Foralumab alone (100ug/day) given for 10 consecutive days (n=12). Patients continued standard of care medication. Results We observed reduction of serum IL-6 and C-reactive protein in Foralumab alone vs. untreated or Foralumab/Dexa treated patients. More rapid clearance of lung infiltrates as measured by chest CT was observed in Foralumab and Foralumab/Dexa treated subjects vs. those that did not receive Foralumab. Foralumab treatment was well-tolerated with no severe adverse events. Conclusions This pilot study suggests that nasal Foralumab is well tolerated and may be of benefit in treatment of immune hyperactivity and lung involvement in COVID-19 disease and that further studies are warranted.
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Affiliation(s)
- Thais G Moreira
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Kimble T F Matos
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | | | | | | | | | | | - Marcelle G Spinola
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Gerson D Keppeke
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jules Jacob
- Tiziana LifeScience, Doylestown, PA, United States
| | | | - Karen Chen
- Department of Radiology, Boston Children's Hospital, Harvard Medical School, Boston, MA, United States
| | - Saef Izzy
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Brian C Healey
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Rafael M Rezende
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | | | | | - Howard L Weiner
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
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4
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Villa E, Piscaglia F, Geva R, Dalecos G, Papatheodoridis G, Ciomei M, Davite C, Crivori P, Palejwala V, Jacob J, Hamzeh F, Shailubhai K, Santoro A, Sangiovanni A. Phase IIa safety and efficacy of milciclib, a pan-cyclin dependent kinase inhibitor, in unresectable, sorafenib-refractory or -intolerant hepatocellular carcinoma patients. J Clin Oncol 2020. [DOI: 10.1200/jco.2020.38.15_suppl.e16711] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e16711 Background: Current hepatocellular carcinoma (HCC) therapeutics, tyrosine kinase inhibitors (TKI) and checkpoint inhibitors (CI), provide limited improvement in overall survival, suggesting the need to identify drugs with broad-spectrum mechanisms of action, used alone or in combination with a TKI or CI. Milciclib, a pan cyclin dependent kinase inhibitor, exhibited anti-cancer activity in refractory solid malignancy patients. The primary objective of this trial was to evaluate safety and tolerability of milciclib in sorafenib-refractory or intolerant advanced HCC patients. Methods: Single arm and multi-center study in advanced HCC patients was conducted in Italy, Greece and Israel. Milciclib was administered orally for up to 6 cycles. Each cycle consisted of 100mg milciclib daily for 4d on/3d off/week for 4 weeks. Safety assessment was the primary endpoint and secondary endpoints included progression free survival (PFS), time to progression (TTP) and clinical benefit rate (CBR). Results: A total of 31 patients were enrolled and 28 were evaluable for efficacy, of which 14 (50%) completed 6-months of treatment. Milciclib was well-tolerated with manageable toxicities. Eighteen of 31 treated patients had drug-related adverse events (AEs) with most frequent (≥5%) occurrence of drug-related diarrhea, nausea, asthenia, fatigue, retinal hemorrhage, rash and myalgia. No drug-related deaths were recorded. Nine of 14 patients (64%) continued treatment under Compassionate Use after study completion. Seven patients received milciclib until 9, 9, 10, 11, 13, 13 and 16 months. The remaining 2 patients are in the 16th month of treatment. Clinical response to treatment, assessed by mRECIST (independent radiological review), is shown in the Table. Both median TTP and PFS were 5.9 months. Conclusions: Milciclib, acting via a new mechanism, was safe, well-tolerated and met primary and secondary endpoints with 61% CBR. These promising clinical data warrant further evaluation of milciclib. Clinical trial information: NCT03109886 . [Table: see text]
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Affiliation(s)
| | | | - Rabit Geva
- Tel Aviv Sourasky Medical Center, Tel Aviv-Yafo, Israel
| | - George Dalecos
- General University Hospital of Larissa, Thessaly, Greece
| | - George Papatheodoridis
- Laiko General Hospital of Athens, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Christina Davite
- Clinical Organization for Strategies and Solutions (CLIOSS), NMS Group, Nerviano, Italy
| | - Patrizia Crivori
- Clinical Organization for Strategies and Solutions (CLIOSS), NMS Group, Nerviano, Italy
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5
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Pivetti A, Di Marco L, Bristot L, Milosa F, Critelli RM, De Maria N, Di Benedetto F, Palejwala V, Jacob J, Shailubhai K, Villa E. Safety and clinical activity of combination treatment with regorafenib and milciclib in liver transplant patients with hepatocellular carcinoma recurrence. J Clin Oncol 2020. [DOI: 10.1200/jco.2020.38.15_suppl.e16634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e16634 Background: Recurrence of hepatocellular carcinoma after liver transplant (LT-HCC), affects ~40% of patients. As LT-HCC drastically limits therapeutic options, combination of drugs with different mechanism of actions might be an attractive approach. Primary objective of this MiHRCO (Milciclib and Half Regorafenib CO-administration) protocol (87/2019/COMP/MiHRCO) is to evaluate safety and clinical activity of combination of Regorafenib (a tyrosine kinase inhibitor with higher clinical activity in aggressive HCC) with Milciclib (a pan cyclin dependent kinase inhibitor with clinical activities in refractory solid malignancy patients and HCC) in LT-HCC patients. Methods: Seven patients with LT-HCC are enrolled to date. Regorafenib administered at half the prescribed dose (80mg/day) for 3 weeks followed by 1 week Off and milciclib at 100 mg daily for 4 day On/3 day Off. Patients were maintained on this combination regimen until disease progression and/or unacceptable side effects. Primary endpoint was safety and secondary endpoints included progression free survival, time to progression, and clinical benefit rate. Results: This single-arm, single-center operative protocol in LT-HCC patients with extra-hepatic metastasis, not eligible to first line therapy with sorafenib (Todesca P. et al. Hepatology; doi: 10.1002/hep.30588), is currently ongoing. The combination treatment is well-tolerated with manageable toxicities (mostly related with regorafenib), i.e. moderate diarrhea, slight increase of hypertension in previously hypertensive patients and moderate hand and foot syndrome. Patients continuing with therapy are currently in 2 to 10 months of treatment period. All patients are exhibiting stable disease with reduced clinical symptoms. The mean AFP (□-fetoprotein) level (1310±200 ng/ml) at enrollment was reduced by 20% with in the first month of therapy. Importantly, AFP levels in 2 patients, treated for longer period, were reduced by 50%. Conclusions: Regorafenib and milciclib combination was well-tolerated. Most patients showed disease stabilization along with reduction in AFP levels within the first month of therapy. The encouraging clinical activity in difficult-to-treat patients with LT-HCC warrants continuation of this protocol and further evaluation in a larger controlled study. Clinical trial information: 87/2019/COMP/MiHRCO .
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Affiliation(s)
- Alessandra Pivetti
- 1University of Modena & Reggio Emilia Via del Pozzo 7141124, Modena, Italy
| | - Lorenza Di Marco
- University of Modena & Reggio Emilia Via del Pozzo 7141124, Modena, Italy
| | - Laura Bristot
- University of Modena & Reggio Emilia Via del Pozzo 7141124, Modena, Italy
| | - Fabiola Milosa
- University of Modena & Reggio Emilia Via del Pozzo 7141124, Modena, Italy
| | | | - Nicola De Maria
- University of Modena & Reggio Emilia Via del Pozzo 7141124, Modena, Italy
| | - Fabrizio Di Benedetto
- Liver Transplant center, AOU and University of Modena and Reggio Emilia, Modena, Italy
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Ilan Y, Shailubhai K, Sanyal A. Immunotherapy with oral administration of humanized anti-CD3 monoclonal antibody: a novel gut-immune system-based therapy for metaflammation and NASH. Clin Exp Immunol 2019; 193:275-283. [PMID: 29920654 DOI: 10.1111/cei.13159] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/14/2018] [Indexed: 02/06/2023] Open
Abstract
The immune system plays a role in the pathogenesis of non-alcoholic steatohepatitis (NASH) underlying hepatocyte injury and fibrosis progression at all disease stages. Oral administration of anti-CD3 monoclonal antibody (mAb) has been shown in preclinical studies to be an effective method for systemic immune modulation and alleviates immune-mediated disorders without T cell depletion. In the present review, we summarize the concept of the oral administration of humanized anti-CD3 mAb in patients with NASH and discuss the potential of this treatment to address the current requirements of treatments for NASH. Recently published preclinical and clinical data on oral administration of anti CD3 are discussed. Human trials have shown that the oral administration of anti-CD3 in healthy volunteers, patients with chronic hepatitis C virus (HCV) infection and patients with NASH and type 2 diabetes is safe and well tolerated, as well as biologically active. Oral anti-CD3 induces regulatory T cells, suppresses the chronic inflammatory state associated with NASH and exerts a beneficial effect on clinically relevant parameters. Foralumab is a fully human anti-CD3 mAb that has recently been shown to exert a potent anti-inflammatory effect in humanized mice. It is being developed for treatment of NASH and primary biliary cholangitis (PBC). Oral administration of anti CD3 may provide an effective therapy for patients with NASH.
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Affiliation(s)
- Y Ilan
- Gastroenterology and Liver Units, Department of Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - K Shailubhai
- Tiziana Life Sciences, R&, D Center, Doylestown, PA, USA
| | - A Sanyal
- Division of Gastroenterology, Hepatology and Nutrition, Department of Internal Medicine, VCU School of Medicine, Richmond, VA, USA
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Abstract
Hepatocellular carcinoma (HCC) is swiftly increasing in prevalence globally with a high mortality rate. The progression of HCC in patients is induced with advanced fibrosis, mainly cirrhosis, and hepatitis. The absence of proper preventive or curative treatment methods encouraged extensive research against HCC to develop new therapeutic strategies. The Food and Drug Administration-approved Nexavar (sorafenib) is used in the treatment of patients with unresectable HCC. In 2017, Stivarga (regorafenib) and Opdivo (nivolumab) got approved for patients with HCC after being treated with sorafenib, and in 2018, Lenvima (lenvatinib) got approved for patients with unresectable HCC. But, owing to the rapid drug resistance development and toxicities, these treatment options are not completely satisfactory. Therefore, there is an urgent need for new systemic combination therapies that target different signaling mechanisms, thereby decreasing the prospect of cancer cells developing resistance to treatment. In this review, HCC etiology and new therapeutic strategies that include currently approved drugs and other potential candidates of HCC such as Milciclib, palbociclib, galunisertib, ipafricept, and ramucirumab are evaluated.
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Key Words
- AMP, adenosine monophosphate
- AMPK, AMP-activated protein kinase
- ATP, adenosine 5′-triphosphate
- BMF, Bcl2 modifying factor
- BMI, body mass index
- CDK, cyclin-dependent kinase
- CTGF, connective tissue growth factor
- CTL, cytotoxic T lymphocyte
- CTLA, cytotoxic T-lymphocyte-associated protein
- ECM, extracellular matrix
- EFGR, endothelial growth factor receptor
- EGFR, epidermal growth factor receptor
- EMT, Epithelial–mesenchymal transition
- ERK, extracellular signal-regulated kinase
- FDA, Food and Drug Administration
- GFG, fibroblast growth factor
- HBV, hepatitis B virus
- HBcAg, hepatitis B core antibody
- HBsAg, HBV surface antigen
- HCC, Hepatocellular carcinoma
- HCV, hepatitis B virus
- HDV, hepatitis D virus
- HIF, hypoxia-inducible factor
- HIV, human immunodeficiency virus
- IGFR, insulin-like growth factor
- JAK, janus kinase
- MAPK, mitogen-activated protein kinase
- MDSC, myeloid-derived suppressor cell
- NASH, nonalcoholic steatohepatitis
- NK, natural killer
- NKT, natural killer T cell
- ORR, objective response rate
- OS, overall survival
- PAPSS1, 3′-phosphoadenosine 5′-phosphosulfate synthase 1
- PD-L1, programmed death ligand1
- PD1, programmed cell death protein 1
- PDGFR, platelet-derived growth factor receptor
- PEDF, pigment epithelium-derived factor
- PFS, progression-free survival
- PI3K, phosphoinositide 3-kinases
- PTEN, phosphatase and tensin homolog
- PUMA, p53 upregulated modulator of apoptosis
- RFA, radiofrequency ablation
- Rb, retinoblastoma protein
- SCF, stem cell factor
- SHP1, src homology 2 domain–containing phosphatase 1
- STAT3, signal transducer and activator of transcription 3
- TACE, transarterial chemoembolization
- TGF 1, transforming growth factor-1
- TK, tyrosine kinase
- TKI, Tyrosine kinase inhibitor
- TRKA, tropomyosin receptor kinase A
- Treg, regulatory T cells
- VEGF, vascular endothelial growth factor
- VEGFR, vascular endothelial growth factor receptor
- bFGF, basic fibroblast growth factor
- combination therapy
- cyclin-dependent kinase inhibitors
- hepatocellular carcinoma
- hepatology
- tyrosine kinase inhibitors
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Affiliation(s)
- Aastha Jindal
- Research and Development Center, Baruch S. Blumberg Institute, Doylestown, PA 18902, USA
- Address for correspondence: Aastha Jindal, Research and Development Center, Baruch S. Blumberg Institute, Doylestown, PA 18902, USA.
| | - Anusha Thadi
- Research and Development Center, Baruch S. Blumberg Institute, Doylestown, PA 18902, USA
| | - Kunwar Shailubhai
- Research and Development Center, Baruch S. Blumberg Institute, Doylestown, PA 18902, USA
- Research & Development, Tiziana Lifesciences, Doylestown, PA 18902, USA
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8
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Boulete IM, Thadi A, Beaufrand C, Patwa V, Joshi A, Foss JA, Eddy EP, Eutamene H, Palejwala VA, Theodorou V, Shailubhai K. Oral treatment with plecanatide or dolcanatide attenuates visceral hypersensitivity via activation of guanylate cyclase-C in rat models. World J Gastroenterol 2018; 24:1888-1900. [PMID: 29740204 PMCID: PMC5937206 DOI: 10.3748/wjg.v24.i17.1888] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/23/2018] [Accepted: 03/18/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the effects of plecanatide and dolcanatide on maintenance of paracellular permeability, integrity of tight junctions and on suppression of visceral hypersensitivity.
METHODS Transport of fluorescein isothiocyanate (FITC)-dextran was measured to assess permeability across cell monolayers and rat colon tissues. Effects of plecanatide and dolcanatide on the integrity of tight junctions in Caco-2 and T84 monolayers and on the expression and localization of occludin and zonula occludens-1 (ZO-1) were examined by immunofluorescence microscopy. Anti-nociceptive activity of these agonists was evaluated in trinitrobenzene sulfonic acid (TNBS)-induced inflammatory as well as in non-inflammatory partial restraint stress (PRS) rat models. Statistical significance between the treatment groups in the permeability studies were evaluated using unpaired t-tests.
RESULTS Treatment of T84 and Caco-2 monolayers with lipopolysaccharide (LPS) rapidly increased permeability, which was effectively suppressed when monolayers were also treated with plecanatide or dolcanatide. Similarly, when T84 and Caco-2 monolayers were treated with LPS, cell surface localization of tight junction proteins occludin and ZO-1 was severely disrupted. When cell monolayers were treated with LPS in the presence of plecanatide or dolcanatide, occludin and ZO-1 were localized at the cell surface of adjoining cells, similar to that observed for vehicle treated cells. Treatment of cell monolayers with plecanatide or dolcanatide without LPS did not alter permeability, integrity of tight junctions and cell surface localization of either of the tight junction proteins. In rat visceral hypersensitivity models, both agonists suppressed the TNBS-induced increase in abdominal contractions in response to colorectal distension without affecting the colonic wall elasticity, and both agonists also reduced colonic hypersensitivity in the PRS model.
CONCLUSION Our results suggest that activation of GC-C signaling might be involved in maintenance of barrier function, possibly through regulating normal localization of tight junction proteins. Consistent with these findings, plecanatide and dolcanatide showed potent anti-nociceptive activity in rat visceral hypersensitivity models. These results imply that activation of GC-C signaling may be an attractive therapeutic approach to treat functional constipation disorders and inflammatory gastrointestinal conditions.
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Affiliation(s)
| | - Anusha Thadi
- Baruch S. Blumberg Institute, Doylestown, PA 18902, United States
| | | | - Viren Patwa
- Baruch S. Blumberg Institute, Doylestown, PA 18902, United States
| | - Apoorva Joshi
- Baruch S. Blumberg Institute, Doylestown, PA 18902, United States
| | - John A Foss
- Synergy Pharmaceuticals Inc., 420 Lexington Avenue, New York, NY 10170, United States
| | - E Priya Eddy
- Synergy Pharmaceuticals Inc., 420 Lexington Avenue, New York, NY 10170, United States
| | | | - Vaseem A Palejwala
- Synergy Pharmaceuticals Inc., 420 Lexington Avenue, New York, NY 10170, United States
| | | | - Kunwar Shailubhai
- Baruch S. Blumberg Institute, Doylestown, PA 18902, United States
- Synergy Pharmaceuticals Inc., 420 Lexington Avenue, New York, NY 10170, United States
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DeMicco M, Barrow L, Hickey B, Shailubhai K, Griffin P. Randomized clinical trial: efficacy and safety of plecanatide in the treatment of chronic idiopathic constipation. Therap Adv Gastroenterol 2017; 10:837-851. [PMID: 29147135 PMCID: PMC5673020 DOI: 10.1177/1756283x17734697] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 09/11/2017] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Plecanatide, with the exception of a single amino acid replacement, is identical to human uroguanylin and is approved in the United States for adults with chronic idiopathic constipation (CIC). This double-blind, placebo-controlled, phase III study evaluated the efficacy and safety of plecanatide versus placebo in CIC. METHODS Adults meeting modified Rome III CIC criteria were randomized to plecanatide 3 mg (n = 443), 6 mg (n = 449), or placebo (n = 445). Patients recorded bowel movement (BM) characteristics [including spontaneous BMs (SBMs) and complete SBMs (CSBMs)] and rated CIC symptoms in daily electronic diaries. The primary endpoint was the percentage of durable overall CSBM responders (weekly responders for ⩾9 of 12 treatment weeks, including ⩾3 of the last 4 weeks). Weekly responders had ⩾3 CSBMs/week and an increase of ⩾1 CSBM from baseline for the same week. RESULTS A significantly greater percentage of durable overall CSBM responders resulted with each plecanatide dose compared with placebo (3 mg = 20.1%; 6 mg = 20.0%; placebo = 12.8%; p = 0.004 each dose). Over the 12 weeks, plecanatide significantly improved stool consistency and stool frequency. Significant increases in mean weekly SBMs and CSBMs began in week 1 and were maintained through week 12 in plecanatide-treated patients. Adverse events were mostly mild/moderate, with diarrhea being the most common (3 mg = 3.2%; 6 mg = 4.5%; placebo = 1.3%). CONCLUSIONS Plecanatide resulted in a significantly greater percentage of durable overall CSBM responders and improved stool frequency and secondary endpoints. Plecanatide was well tolerated; the most common AE, diarrhea, occurred in a small number of patients.[ClinicalTrials.gov identifier: NCT02122471].
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Ogura M, Deng S, Preston-Hurlburt P, Ogura H, Shailubhai K, Kuhn C, Weiner HL, Herold KC. Oral treatment with foralumab, a fully human anti-CD3 monoclonal antibody, prevents skin xenograft rejection in humanized mice. Clin Immunol 2017; 183:240-246. [PMID: 28739191 DOI: 10.1016/j.clim.2017.07.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/14/2017] [Accepted: 07/14/2017] [Indexed: 01/12/2023]
Abstract
Oral administration of biologics may be a feasible approach for immune therapy that improves drug safety and potentiates mechanisms of tolerance at mucosal barriers. We tested the ability of a fully human non-FcR binding anti-CD3 mAb, foralumab, to prevent skin xenograft rejection in mice with human immune systems. At an intragastric dose of 15μg, the drug could transit through the small bowel. Serum absorption and binding of lymphoid cells was seen and proliferative responses of splenic CD8+ T cells to mitogen were reduced. Five consecutive daily doses, then weekly dosing led to indefinite graft acceptance without depletion of peripheral T cells. Proliferative and cytokine responses to activation of splenocytes with PHA were reduced. The serum levels of IL-10 but not TNF were increased 6days after application of the skin graft. Oral treatment with anti-CD3 mAb may represent a feasible approach for immune modulation.
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Affiliation(s)
- Mineko Ogura
- Department of Immunobiology, Yale University, New Haven, CT, United States
| | - Songyan Deng
- Department of Immunobiology, Yale University, New Haven, CT, United States
| | | | - Hideki Ogura
- Department of Immunobiology, Yale University, New Haven, CT, United States
| | - Kunwar Shailubhai
- Tiziana Life Sciences, R&D Center, 3805 Old Easton Road, Doylestown, PA 18902, United States
| | - Chantal Kuhn
- Ann Romney Center for Neurologic Diseases, Brigham & Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Howard L Weiner
- Ann Romney Center for Neurologic Diseases, Brigham & Women's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Kevan C Herold
- Department of Immunobiology, Yale University, New Haven, CT, United States; Department of Internal Medicine, Yale University, New Haven, CT, United States.
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11
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Aspeslagh S, Shailubhai K, Bahleda R, Gazzah A, Varga A, Hollebecque A, Massard C, Spreafico A, Reni M, Soria JC. Phase I dose-escalation study of milciclib in combination with gemcitabine in patients with refractory solid tumors. Cancer Chemother Pharmacol 2017; 79:1257-1265. [PMID: 28424962 DOI: 10.1007/s00280-017-3303-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 03/24/2017] [Indexed: 01/10/2023]
Abstract
BACKGROUND This phase I trial evaluated the safety and tolerability of milciclib, an inhibitor of multiple cyclin-dependent kinases and tropomycin receptor kinase A, in combination with gemcitabine in patients with refractory solid tumors. DESIGN Sixteen patients were enrolled and treated with milciclib at three dose levels (45 mg/m2/day, n = 3; 60 mg/m2/day, n = 3; and 80 mg/m2/day, n = 10) with a fixed dose of gemcitabine (1000 mg/m2/day). Milciclib was administered orally once daily for 7 days on/7 days off in a 4-week cycle, and gemcitabine was administered intravenously on days 1, 8 and 15 in a 4-week cycle. RESULTS All 16 enrolled patients were evaluable for safety and toxicity. Dose-limiting toxicities, which occurred in only one out of nine patients treated at the maximum dose tested (milciclib 80 mg/m2/day and gemcitabine 1000 mg/m2/day), consisted of Grade 4 thrombocytopenia, Grade 3 ataxia and Grade 2 tremors in the same patient. Most frequent treatment-related AEs were neutropenia and thrombocytopenia. Among 14 evaluable patients, one NSCLC patient showed partial response and 4 patients (one each with thyroid, prostatic, pancreatic carcinoma and peritoneal mesothelioma) showed long-term disease stabilization (>6-14 months). Pharmacokinetics of the orally administered milciclib (~t1/2 33 h) was not altered by concomitant treatment with gemcitabine. CONCLUSION The combination treatment was well tolerated with manageable toxicities. The recommended phase II dose was 80 mg/m2/day for milciclib and 1000 mg/m2/day for gemcitabine. This combination treatment regimen showed encouraging clinical benefit in ~36% patients, including gemcitabine refractory patients. These results support further development of combination therapies with milciclib in advanced cancer patients.
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Affiliation(s)
- Sandrine Aspeslagh
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France.
| | | | - Rastilav Bahleda
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France
| | - Anas Gazzah
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France
| | - Andréa Varga
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France
| | - Antoine Hollebecque
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France
| | - Christophe Massard
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France
| | - Anna Spreafico
- Department of Medical Oncology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Michele Reni
- Department of Medical Oncology, IRCCS Ospedale San Raffaele, Milan, Italy
| | - Jean-Charles Soria
- Drug Development Department (DITEP), Gustave Roussy Cancer Centre, Université Paris-Saclay, 114 Rue Eduard Vaillant, 94805, Villejuif, France
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Brancale A, Shailubhai K, Ferla S, Ricci A, Bassetto M, Jacob GS. Therapeutically targeting guanylate cyclase-C: computational modeling of plecanatide, a uroguanylin analog. Pharmacol Res Perspect 2017; 5:e00295. [PMID: 28357122 PMCID: PMC5368960 DOI: 10.1002/prp2.295] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/23/2016] [Accepted: 11/30/2016] [Indexed: 12/20/2022] Open
Abstract
Plecanatide is a recently developed guanylate cyclase-C (GC-C) agonist and the first uroguanylin analog designed to treat chronic idiopathic constipation (CIC) and irritable bowel syndrome with constipation (IBS-C). GC-C receptors are found across the length of the intestines and are thought to play a key role in fluid regulation and electrolyte balance. Ligands of the GC-C receptor include endogenous agonists, uroguanylin and guanylin, as well as diarrheagenic, Escherichia coli heat-stable enterotoxins (ST). Plecanatide mimics uroguanylin in its 2 disulfide-bond structure and in its ability to activate GC-Cs in a pH-dependent manner, a feature associated with the presence of acid-sensing residues (Asp2 and Glu3). Linaclotide, a synthetic analog of STh (a 19 amino acid member of ST family), contains the enterotoxin's key structural elements, including the presence of three disulfide bonds. Linaclotide, like STh, activates GC-Cs in a pH-independent manner due to the absence of pH-sensing residues. In this study, molecular dynamics simulations compared the stability of plecanatide and linaclotide to STh. Three-dimensional structures of plecanatide at various protonation states (pH 2.0, 5.0, and 7.0) were simulated with GROMACS software. Deviations from ideal binding conformations were quantified using root mean square deviation values. Simulations of linaclotide revealed a rigid conformer most similar to STh. Plecanatide simulations retained the flexible, pH-dependent structure of uroguanylin. The most active conformers of plecanatide were found at pH 5.0, which is the pH found in the proximal small intestine. GC-C receptor activation in this region would stimulate intraluminal fluid secretion, potentially relieving symptoms associated with CIC and IBS-C.
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Affiliation(s)
- Andrea Brancale
- School of Pharmacy and Pharmaceutical Sciences Cardiff University Cardiff United Kingdom
| | | | - Salvatore Ferla
- School of Pharmacy and Pharmaceutical Sciences Cardiff University Cardiff United Kingdom
| | - Antonio Ricci
- School of Pharmacy and Pharmaceutical Sciences Cardiff University Cardiff United Kingdom
| | - Marcella Bassetto
- School of Pharmacy and Pharmaceutical Sciences Cardiff University Cardiff United Kingdom
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Chang WCL, Masih S, Thadi A, Patwa V, Joshi A, Cooper HS, Palejwala VA, Clapper ML, Shailubhai K. Plecanatide-mediated activation of guanylate cyclase-C suppresses inflammation-induced colorectal carcinogenesis in Apc +/Min-FCCC mice. World J Gastrointest Pharmacol Ther 2017; 8:47-59. [PMID: 28217374 PMCID: PMC5292606 DOI: 10.4292/wjgpt.v8.i1.47] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/30/2016] [Accepted: 10/27/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To evaluate the effect of orally administered plecanatide on colorectal dysplasia in Apc+/Min-FCCC mice with dextran sodium sulfate (DSS)-induced inflammation.
METHODS Inflammation driven colorectal carcinogenesis was induced in Apc+/Min-FCCC mice by administering DSS in their drinking water. Mice were fed a diet supplemented with plecanatide (0-20 ppm) and its effect on the multiplicity of histopathologically confirmed polypoid, flat and indeterminate dysplasia was evaluated. Plecanatide-mediated activation of guanylate cyclase-C (GC-C) signaling was assessed in colon tissues by measuring cyclic guanosine monophosphate (cGMP) by ELISA, protein kinase G-II and vasodilator stimulated phosphoprotein by immunoblotting. Ki-67, c-myc and cyclin D1 were used as markers of proliferation. Cellular levels and localization of β-catenin in colon tissues were assessed by immunoblotting and immunohistochemistry, respectively. Uroguanylin (UG) and GC-C transcript levels were measured by quantitative reverse transcription polymerase chain reaction (RT-PCR). A mouse cytokine array panel was used to detect cytokines in the supernatant of colon explant cultures.
RESULTS Oral treatment of Apc+/MinFCCC mice with plecanatide produced a statistically significant reduction in the formation of inflammation-driven polypoid, flat and indeterminate dysplasias. This anti-carcinogenic activity of plecanatide was accompanied by activation of cGMP/GC-C signaling mediated inhibition of Wnt/β-catenin signaling and reduced proliferation. Plecanatide also decreased secretion of pro-inflammatory cytokines (IL-6, IL1 TNF), chemokines (MIP-1, IP-10) and growth factors (GCSF and GMCSF) from colon explants derived from mice with acute DSS-induced inflammation. The effect of plecanatide-mediated inhibition of inflammation/dysplasia on endogenous expression of UG and GC-C transcripts was measured in intestinal tissues. Although GC-C expression was not altered appreciably, a statistically significant increase in the level of UG transcripts was detected in the proximal small intestine and colon, potentially due to a reduction in intestinal inflammation and/or neoplasia. Taken together, these results suggest that reductions in endogenous UG, accompanied by dysregulation in GC-C signaling, may be an early event in inflammation-promoted colorectal neoplasia; an event that can potentially be ameliorated by prophylactic intervention with plecanatide.
CONCLUSION This study provides the first evidence that orally administered plecanatide reduces the multiplicity of inflammation-driven colonic dysplasia in mice, demonstrating the utility for developing GC-C agonists as chemopreventive agents.
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Shailubhai K, Palejwala V, Arjunan KP, Saykhedkar S, Nefsky B, Foss JA, Comiskey S, Jacob GS, Plevy SE. Plecanatide and dolcanatide, novel guanylate cyclase-C agonists, ameliorate gastrointestinal inflammation in experimental models of murine colitis. World J Gastrointest Pharmacol Ther 2015; 6:213-222. [PMID: 26558155 PMCID: PMC4635161 DOI: 10.4292/wjgpt.v6.i4.213] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 07/16/2015] [Accepted: 08/14/2015] [Indexed: 02/07/2023] Open
Abstract
AIM: To evaluate the effect of orally administered plecanatide or dolcanatide, analogs of uroguanylin, on amelioration of colitis in murine models.
METHODS: The cyclic guanosine monophosphate (cGMP) stimulatory potency of plecanatide and dolcanatide was measured using a human colon carcinoma T84 cell-based assay. For animal studies all test agents were formulated in phosphate buffered saline. Sulfasalazine or 5-amino salicylic acid (5-ASA) served as positive controls. Effect of oral treatment with test agents on amelioration of acute colitis induced either by dextran sulfate sodium (DSS) in drinking water or by rectal instillation of trinitrobenzene sulfonic (TNBS) acid, was examined in BALB/c and/or BDF1 mice. Additionally, the effect of orally administered plecanatide on the spontaneous colitis in T-cell receptor alpha knockout (TCRα-/-) mice was also examined. Amelioration of colitis was assessed by monitoring severity of colitis, disease activity index and by histopathology. Frozen colon tissues were used to measure myeloperoxidase activity.
RESULTS: Plecanatide and dolcanatide are structurally related analogs of uroguanylin, which is an endogenous ligand of guanylate cyclase-C (GC-C). As expected from the agonists of GC-C, both plecanatide and dolcanatide exhibited potent cGMP-stimulatory activity in T84 cells. Once-daily treatment by oral gavage with either of these analogs (0.05-0.5 mg/kg) ameliorated colitis in both DSS and TNBS-induced models of acute colitis, as assessed by body weight, reduction in colitis severity (P < 0.05) and disease activity index (P < 0.05). Amelioration of colitis by either of the drug candidates was comparable to that achieved by orally administered sulfasalazine or 5-ASA. Plecanatide also effectively ameliorated colitis in TCRα-/- mice, a model of spontaneous colitis. As dolcanatide exhibited higher resistance to proteolysis in simulated gastric and intestinal juices, it was selected for further studies.
CONCLUSION: This is the first-ever study reporting the therapeutic utility of GC-C agonists as a new class of orally delivered and mucosally active drug candidates for the treatment of inflammatory bowel diseases.
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Shailubhai K, Comiskey S, Foss JA, Feng R, Barrow L, Comer GM, Jacob GS. Plecanatide, an oral guanylate cyclase C agonist acting locally in the gastrointestinal tract, is safe and well-tolerated in single doses. Dig Dis Sci 2013; 58:2580-6. [PMID: 23625291 DOI: 10.1007/s10620-013-2684-z] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 04/09/2013] [Indexed: 12/12/2022]
Abstract
PURPOSE Plecanatide, an analogue of uroguanylin, activates the guanylate cyclase C (GC-C) receptor found on the GI mucosal epithelial cells, leading to secretion of fluid, facilitating bowel movements. Plecanatide is being investigated as a potential treatment for constipating GI disorders. The aim of this investigation was to assess the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of single doses of plecanatide in healthy volunteers. METHODS A total of 72 healthy volunteers at a single site were randomized in 9 cohorts to receive oral plecanatide or placebo from 0.1 to 48.6 mg. Plasma PK samples were collected pre-dose and post-dose. PD assessments included time to first stool, stool frequency, and stool consistency using the Bristol Stool Form Scale. All adverse events were documented. RESULTS Plecanatide was safe and well-tolerated at all dose levels. A total of 17 of 71 subjects (23.9%) reported 25 treatment-emergent adverse events (TEAEs) during the study. The number of TEAEs reported by subjects who received plecanatide or placebo was comparable (24.5 vs. 22.2%, respectively). There were no dose-related increases in TEAEs or any SAEs reported. No measurable systemic absorption of oral plecanatide was observed at any of the oral doses studied, utilizing an assay sensitive down to 1 ng/mL. CONCLUSIONS Plecanatide, an oral GC-C agonist, acting locally within the GI tract without measurable systemic exposure, was safe and well-tolerated in single doses up to 48.6 mg. The study was not powered for statistical analyses, but trends in PD parameters supported continued clinical development.
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Affiliation(s)
- Kunwar Shailubhai
- Synergy Pharmaceuticals, Inc., 3805 Old Easton Road, Doylestown, PA 18902, USA.
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16
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Choudhari SR, Khan MA, Harris G, Picker D, Jacob GS, Block T, Shailubhai K. Deactivation of Akt and STAT3 signaling promotes apoptosis, inhibits proliferation, and enhances the sensitivity of hepatocellular carcinoma cells to an anticancer agent, Atiprimod. Mol Cancer Ther 2007; 6:112-21. [PMID: 17237271 DOI: 10.1158/1535-7163.mct-06-0561] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Atiprimod is a novel anticancer and antiangiogenic drug candidate which is currently being evaluated in patients with liver carcinoid and multiple myeloma. In this study, we report that atiprimod selectively inhibited proliferation and induced apoptosis in HCC cells that expressed either hepatitis B virus (HBV) or hepatitis C virus, through deactivation of protein kinase B (Akt) and signal transducers and activators of transcription 3 (STAT3) signaling. In HepG2 AD38 cells, which express HBV genome under the control of a tetracycline-off promoter, both Akt and STAT3 were constitutively activated in response to HBV expression. However, this constitutive activation was not sensitive to lamivudine, a drug that inhibits HBV replication without affecting its gene expression, suggesting that HBV replication per se might not be responsible for the activation. Interestingly, the electrophoretic mobility of p-STAT3 protein bands on immunoblot was slower when AD38 cells were cultured in the absence of tetracycline, suggesting a differential phosphorylation in response to HBV expression. In HCC cells, interleukin 6 stimulates the phosphorylation of STAT3 both at serine 727 and at tyrosine 705 positions. The interleukin 6-stimulated activation of STAT3 and Akt was inhibited not only by atiprimod but also by LY294002, a phosphoinositide-3-kinase-specific inhibitor, and by NS398, a cyclooxygenase-2-selective inhibitor. The combination of these compounds did not produce any additive effect, implying that the mechanisms by which HBV activates Akt and STAT3 might also involve phosphoinositide-3-kinase and cyclooxygenase-2. Collectively, these results suggest that atiprimod could be useful as a multifunctional drug candidate for the treatment of HCC in humans.
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Affiliation(s)
- Sweeta R Choudhari
- Institute of Hepatitis and Virus Research/Drexel Institute of Biotechnology and Virology Research, Pennsylvania Biotechnology Center, 3805 Old Easton Road, Room 254, Doylestown, PA 18902, USA
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Shailubhai K. Atiprimod: A multi-functional drug candidate for myeloid and other malignancies. Leuk Res 2007; 31:9-10. [PMID: 16860863 DOI: 10.1016/j.leukres.2006.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2006] [Revised: 06/08/2006] [Accepted: 06/10/2006] [Indexed: 10/24/2022]
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Shailubhai K, Dheer S, Picker D, Kaur G, Sausville EA, Jacob GS. Atiprimod is an inhibitor of cancer cell proliferation and angiogenesis. J Exp Ther Oncol 2004; 4:267-79. [PMID: 15844657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Atiprimod, a novel compound belonging to the azaspirane class of cationic amphiphilic drugs, exhibits both anti-proliferative and anti-angiogenic activities. Atiprimod inhibited proliferation of all human cancer cell lines included in the National Cancer Institute panel with IC50 values in the low micromolar range. Notably, metastatic cell lines were more sensitive to the compound compared to the non-metastatic cell lines derived from the same tumor tissue types. Atiprimod also induced apoptosis and activated both caspase-9 and caspase-3 in T84 colon carcinoma cells. Hence, the anti-proliferative activity could partly be due to its pro-apoptotic activity. Regarding angiogenesis in vitro, atiprimod inhibited both bFGF and VEGF induced proliferation and migration of human umbilical vein endothelial cells (HUVECs), resulting in disruption of cord formation. In addition, atiprimod also suppressed formation of new blood vessels in a chorioallantoic membrane assay. Previous studies have also shown that atiprimod treatment reduced production of IL-6, VEGF and inhibited activation of Stat3, a constitutively activated protein in majority of human cancers. Together these findings suggest that atiprimod acts on several molecules that are essential for tumor growth, invasion and metastasis.
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Affiliation(s)
- Kunwar Shailubhai
- Callisto Pharmaceuticals, Inc, 420 Lexington Avenue, Suite 1609, New York, NY 10170, USA.
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Shailubhai K. Bioterrorism: a new frontier for drug discovery and development. IDrugs 2003; 6:773-80. [PMID: 12917773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
Only a few years ago bioterrorism was considered a remote concern but today it has reached the forefront of the public imagination following recent terrorist attacks around the world. The disaster of September 11 2001, followed by anthrax letters sent via the US postal system, and now the renewed tension in the Middle East, have all brought the possibility of bioterrorism a little closer to reality. A number of biological agents could be used in a terrorist attack, including anthrax, botulinum, plague, smallpox, staphylococcal and streptococcal toxins, and the list of emerging pathogens is evolving rapidly. The serious diseases that these agents produce could cause considerable morbidity and mortality if used in a terrorist attack. This evolving threat presents the medical, public health and scientific communities with pressing challenges. The present research efforts in academia are primarily focused on the basic research on the pathogens that are considered to be bioweapons for terrorist attack. Thus, collaborative efforts between academic institutes, pharmaceutical industries and governmental agencies are warranted to translate basic research into drugs, vaccines and diagnostic tests. This review provides a brief overview of the threat from biological weapons and the current biodefense strategy to prevent and control outbreaks of diseases caused by intentional release of these bioweapons of mass destruction.
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Affiliation(s)
- Kunwar Shailubhai
- Callisto Pharmaceuticals Inc, 420 Lexington Avenue, Suite 2501, New York, NY 10170, USA.
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Shailubhai K. Therapeutic applications of guanylate cyclase-C receptor agonists. Curr Opin Drug Discov Devel 2002; 5:261-8. [PMID: 11926132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Uroguanylin, guanylin, lymphoguanylin and bacterial enterotoxin ST are structurally related peptides that activate common guanylate cyclase signaling molecules and, via cyclic GMP (cGMP), regulate water and ion homeostasis in a variety of tissues and organs, including the gastrointestinal (GI) tract, kidneys, lung, prostate, etc. Any disruptions in water and ionic homeostasis due to reduced production of one or more of the guanylin family of peptides can potentially lead to carcinogenic and inflammatory stimuli. Recent findings that expression of uroguanylin and guanylin is dramatically reduced in polyps and colon carcinoma tissues further support the notion that these peptide hormones are important modulators or mediators of signaling pathways leading to the processes involved in carcinogenesis and inflammatory disorders. This review briefly discusses recent research findings suggesting the novel therapeutic applications of agonist peptides of guanylate cyclase-C receptor.
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Affiliation(s)
- Kunwar Shailubhai
- Synergy Pharmaceuticals Inc, 705 General Washington Avenue, Suite 500 A, Norristown, PA 19403, USA.
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Shailubhai K, Yu HH, Karunanandaa K, Wang JY, Eber SL, Wang Y, Joo NS, Kim HD, Miedema BW, Abbas SZ, Boddupalli SS, Currie MG, Forte LR. Uroguanylin treatment suppresses polyp formation in the Apc(Min/+) mouse and induces apoptosis in human colon adenocarcinoma cells via cyclic GMP. Cancer Res 2000; 60:5151-7. [PMID: 11016642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
The enteric peptides, guanylin and uroguanylin, are local regulators of intestinal secretion by activation of receptor-guanylate cyclase (R-GC) signaling molecules that produce cyclic GMP (cGMP) and stimulate the cystic fibrosis transmembrane conductance regulator-dependent secretion of Cl- and HCO3-. Our experiments demonstrate that mRNA transcripts for guanylin and uroguanylin are markedly reduced in colon polyps and adenocarcinomas. In contrast, a specific uroguanylin-R-GC, R-GCC, is expressed in polyps and adenocarcinomas at levels comparable with normal colon mucosa. Activation of R-GCC by uroguanylin in vitro inhibits the proliferation of T84 colon cells and elicits profound apoptosis in human colon cancer cells, T84. Therefore, down-regulation of gene expression and loss of the peptides may interfere with renewal and/or removal of the epithelial cells resulting in the formation of polyps, which can progress to malignant cancers of the colon and rectum. Oral replacement therapy with human uroguanylin was used to evaluate its effects on the formation of intestinal polyps in the Min/+ mouse model for colorectal cancer. Uroguanylin significantly reduces the number of polyps found in the intestine of Min/+ mice by approximately 50% of control. Our findings suggest that uroguanylin and guanylin regulate the turnover of epithelial cells within the intestinal mucosa via activation of a cGMP signaling mechanism that elicits apoptosis of target enterocytes. The intestinal R-GC signaling molecules for guanylin regulatory peptides are promising targets for prevention and/or therapeutic treatment of intestinal polyps and cancers by oral administration of human uroguanylin.
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Affiliation(s)
- K Shailubhai
- Cancer Chemoprevention Group Nutrition Sector, Monsanto Life Sciences Company, St. Louis, Missouri 63167, USA
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22
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Huynh QK, Shailubhai K, Boddupalli H, Yu HH, Broschat KO, Jacob GS. Isolation and characterization from porcine serum of a soluble sulfotransferase responsible for 6-O-sulfation of the galactose residue in 2'-fucosyllactose: implications in the synthesis of the ligand for L-selectin. Glycoconj J 1999; 16:357-63. [PMID: 10619708 DOI: 10.1023/a:1007052228230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A soluble sulfotransferase from porcine serum which catalyzes the transfer of sulfate from adenosine 3'-phosphate 5'-phosphosulphate (PAPS) to 2'-fucosyllactose (2'-FL) was purified 36,333-fold using a combination of conventional and affinity chromatographic steps. The purified enzyme preparation after non-denaturing discontinuous-PAGE exhibited a molecular mass of about 80 kDa by reducing SDS-PAGE. However, when a partially purified enzyme preparation was subjected to gel filtration on Sephacryl S-300, the enzyme activity eluted in the void volume, which indicated that the native enzyme existed as an oligomer. The purified enzyme showed Km values of 9.15 microM for PAPS and 15.38 mM for 2'-FL at the optimum pH value of 7.4. The substrate specificity of the purified enzyme was evaluated with various sugars that are structurally similar to sialyl LewisX (sLeX). Results indicated that 3'-sialyllactose and lactose were efficient acceptors of sulfation, whereas 6'-sialyllactose and 6'-sialyllactosamine were poor substrates for this sulfotransferase. Further, the reaction product analysis revealed that the sulfate substitution, when using 2'-FL as the substrate, was at the C-6 position of the galactose residue. Coincidentally, a similar enzyme activity was also found in porcine lymphoid tissues such as, lymph nodes (peripheral and mesenteric) and spleen. Collectively, these findings suggest that this enzyme might be involved in the synthesis of the ligand for L-selectin.
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Affiliation(s)
- Q K Huynh
- Discovery Research, G. D. Searle and Company, Monsanto Company, St. Louis, MO 63167, USA.
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23
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Shailubhai K, Khai Huynh Q, Boddupalli H, Yu HH, Jacob GS. Purification and characterization of a lymph node sulfotransferase responsible for 6-O-sulfation of the galactose residues in 2'-fucosyllactose and other sialyl LewisX-related sugars. Biochem Biophys Res Commun 1999; 256:170-6. [PMID: 10066442 DOI: 10.1006/bbrc.1999.0258] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A microsomal galactose-6-O-sulfotransferase (Gal-6-O-Stase) from porcine lymph nodes, able to transfer the sulfate group from adenosine 3'-phosphate 5'-phosphosulphate (PAPS) onto 2'-fucosyllactose (2'-FL) and other sialyl LewisX (sLex)-related sugars, has been purified and characterized. The enzyme was purified to about 35,000-fold by a combination of conventional and affinity chromatographic steps. The purified enzyme preparation exhibited two protein bands at around 80-90 and 170 kDa on 7.5% SDS-PAGE under reducing conditions. Both of these protein bands always comigrated in the gel when peak fractions containing Gal-6-O-Stase activity from the 3',5'-ADP-agarose column were subjected to 6% SDS-PAGE under reducing conditions. These protein bands also showed similar binding patterns to WGA (wheat germ agglutinin), Con A (concanvalin A), and EBA (elderberry agglutinin). Similarly, when the enzyme preparation after the hydroxylapatite step was photolabeled with 8-azido-[32P]-PAPS, both 80-90 and 170 kDa protein bands were labeled in a specific manner. These results suggest a possible association of these two protein bands with the enzyme activity. The carbohydrate substrate specificity of this enzyme suggests that it is well suited to catalyze the sulphonation at the C-6 position of the galactose residues of oligosaccharides that are structurally similar to sLex. Furthermore, a survey of several porcine organs revealed that this enzyme was selectively expressed in lymphoid tissues such as lymph nodes (peripheral and mesenteric) and spleen. These findings suggest that this enzyme may be involved in the assembly of 3'-sialyl-6'-sulfo Lewisx, the major capping group of HEV-ligands for L-selectin.
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Affiliation(s)
- K Shailubhai
- Searle Discovery Research, Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri, 63167, USA.
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24
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Shailubhai K, Streeter PR, Smith CE, Jacob GS. Sulfation and sialylation requirements for a glycoform of CD34, a major endothelial ligand for L-selectin in porcine peripheral lymph nodes. Glycobiology 1997; 7:305-14. [PMID: 9134437 DOI: 10.1093/glycob/7.2.305] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Leukocyte recruitment from blood into peripheral lymph nodes is controlled in part by a specific interaction of lymphocyte-associated L-selectin with endothelial cell receptors known as peripheral addressins. In murine lymph nodes, two peripheral addressins have been identified, Gly-CAM-1, a 50 kDa molecule that also appears as a secreted form in plasma, and CD34, a 90 kDa membrane-associated sialomucin. A predominant 105 kDa CD34 mucin-like protein has also been identified in human tonsil as peripheral addressin. We have identified a 120 kDa sialomucin as the predominant peripheral addressin in porcine lymph nodes. Validation of the 120 kDa porcine molecule as a peripheral addressins was based on its ability to bind MECA-79, a monoclonal antibody previously used to isolate peripheral addressins from mouse and human tissues, and to bind an L-selectin-Fc chimera (LS-Fc). The binding with LS-Fc was abolished in the presence of fucoidin, a sulfated polysaccharide known to inhibit L-selectin-receptor interactions. To address the possibility that the 120 kDa ligand may contain common recognition determinants for MECA-79 and L-selectin, the requirements for sialylation and sulfation were compared. Whereas desialylation of 120 kDa ligand drastically reduced its binding to LS-Fc, this treatment appeared to enhance the binding of 120 kDa ligand to MECA-79. In contrast, the binding of both MECA-79 and LS-Fc to 120 kDa ligand was drastically reduced when de novo sulfation of this ligand was reduced by including chlorate, a metabolic inhibitor of sulfation, in the culture media. N-Terminal amino acid sequences of the porcine 120 kDa protein revealed homology with human CD34. Taken together, these findings suggest that the porcine 120 kDa peripheral addressin is an L-selectin-binding glycoform of CD34.
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Affiliation(s)
- K Shailubhai
- Department of Immunology, G. D. Searle Co., a subsidiary of Monsanto Co., St. Louis, MO 63167, USA
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25
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Shailubhai K, Abbas SZ, Jacob GS. Polysulfated derivatives of beta-cyclodextrin and myo-inositol as potent inhibitors of the interaction between L-selectin and peripheral addressin: implying a requirement for highly clustered sulfate groups. Biochem Biophys Res Commun 1996; 229:488-93. [PMID: 8954925 DOI: 10.1006/bbrc.1996.1831] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We have utilized an in vitro assay that measures the binding of an L-selectin-human Fc chimera (LS-Fc) to [35S]sulfate labelled peripheral addressin (PNAd), a 120 kDa glycoprotein ligand for L-selectin in porcine lymph nodes, to evaluate inhibitory properties of a small group of sulfated derivatives of beta-cyclodextrin (beta-CD), sLe(x) and myo-inositol to their non-sulfated counterparts were studied. We found that hepta-sulfated beta-CD (IC50 = 0.2 mM) strongly inhibited the binding of L-selectin to PNAd. In contrast, the monosulfated beta-CD was a poor inhibitor, displaying < 10% inhibition at 0.5 mM and beta-CD was not active as an inhibitor. Similarly, inositol hexakissulfate, a compound containing six sulfate groups on the inositol ring displayed an inhibition of about 61% at 0.5 mM concentration, whereas the non-sulfated myoinositol was not inhibitory. These findings provide evidence that clustering of sulfate groups enhances affinity of molecules for binding to L-selectin.
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Affiliation(s)
- K Shailubhai
- Department of Immunology, G.D. Searle Co., St. Louis, Missouri 63167, USA.
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26
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Shailubhai K, Singh RK, Schmuke JJ, Jacob GS. An enzymatic procedure for the preparation and purification of 3'-phosphoadenosine 5'-phospho-[35S]sulfate ([35S]PAPS): applications in syntheses of 8-azido and 8-bromo derivatives of [35S]PAPS. Anal Biochem 1996; 243:165-70. [PMID: 8954540 DOI: 10.1006/abio.1996.0496] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This paper describes a rapid and an efficient procedure for the enzymatic synthesis of 3'-phosphoadenosine 5'-phospho[35S]sulfate ([35S]PAPS). [35S]PAPS was synthesized by incubating ATP and a carrier-free [35S]-Na2(35)SO4 with ATP sulfurylase, a recombinant APS kinase and inorganic pyrophosphatase. The transfer of 35SO4 group from [35S]Na2SO4 to [35S]PAPS proceeded more efficiently in the presence of an ATP-regenerating system composed of pyruvate kinase and phosphoenol pyruvate. About 90% of the radioactivity present in the starting material [35S]Na2SO4 was transferred to [35S]PAPS within a 2-h reaction incubation. The reaction products were applied to a Mono Q column, and [35S]PAPS was eluted by a step-wise gradient of triethylamine bicarbonate buffer (pH 7.5). Under these conditions, [35S]PAPS eluted as a sharp peak at 0.7 M triethylammonium bicarbonate and it was very well separated from other contaminants. The purified [35S]PAPS (yield 85%, purity > 95%) was functional in donating sulfate to an oligosaccharide acceptor in a standard sulfotransferase reaction. The enzymatic procedure described above was particularly useful for the synthesis of [35S]PAPS at a wide range of concentrations and specific activities (up to 1500 Ci/mmol). This generally useful approach was also found to be successful in the syntheses of 8-azido and 8-bromo derivatives of [35S]PAPS. Applications of these two derivatives of PAPS, for purification and identification of sulfotransferases, have also been discussed.
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Affiliation(s)
- K Shailubhai
- Department of Immunology, G. D. Searle Company (a subsidiary of Monsanto Company), St. Louis, Missouri 63167, USA,
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27
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Scudder PR, Shailubhai K, Duffin KL, Streeter PR, Jacob GS. Enzymatic synthesis of a 6'-sulphated sialyl-Lewisx which is an inhibitor of L-selectin binding to peripheral addressin. Glycobiology 1994; 4:929-32. [PMID: 7537558 DOI: 10.1093/glycob/4.6.929] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
A sulphated form of sialyl-Lewisx, NeuAc alpha 2-3Gal beta 1-4(Fuc alpha 1-3)GlcNAc6OSO3 beta 1-3Gal, was synthesized enzymatically from a precursor disaccharide, GlcNAc6OSO3 beta 1-3Gal, using sequential steps involving beta 1,4-galactosyltransferase, alpha 2,3-trans-sialidase and recombinant alpha 1,3-fucosyltransferase, respectively. Successful enzymatic fucosylation at the 3 position of the GlcNAc6OSO3 residue demonstrated that fucosyltransferase are capable of generating, in situ, sulphated sialyl Lewisx structures containing sulphate at the 6 position of GlcNAc. The sulphated sialyl-Lewisx pentasaccharide produced by this procedure inhibited binding of a soluble form of L-selectin to 35SO4-labelled peripheral addressin with an IC50 of 0.8 mM, whereas sialyl-Lewisx tetrasaccharide was a weaker inhibitor, displaying an IC50 of 3.2 mM. Hemmerich and Rosen (Biochemistry, 33, 4820-4829, 1994) recently reported the presence of Gal beta 1-4GlcNAcO6SO3 structures on murine peripheral addressin Sgp50, in addition to sialyl Lewisx structures sulphated at the 6-O-galactose position. Based on our data, we suggest that sialyl Lewisx sulphated at the 6-O-GlcNAc position may also exist on receptors and function as a ligand for L-selectin.
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Affiliation(s)
- P R Scudder
- Department of Immunology, G.D. Searle Co., Monsanto Co., St Louis, MO 63167, USA
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28
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Shailubhai K, Pukazhenthi BS, Saxena ES, Varma GM, Vijay IK. Glucosidase I, a transmembrane endoplasmic reticular glycoprotein with a luminal catalytic domain. J Biol Chem 1991; 266:16587-93. [PMID: 1885588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We have analyzed the functional domain structure of rat mammary glucosidase I, an enzyme involved in N-linked glycoprotein processing, using biochemical and immunological approaches. The enzyme contains a high mannose type sugar chain that can be cleaved by endo-beta-N-acetyl-D-glucosaminidase H without significantly affecting the catalytic activity. Based on trypsin digestion pattern and the data on membrane topography, glucosidase I constitutes a single polypeptide chain of 85 kDa with two contiguous domains: a membrane-bound domain that anchors the protein to the endoplasmic reticulum and a luminal domain. A catalytically active 39-kDa domain could be released from membranes by limited proteolysis of saponin-permeabilized membranes with trypsin. This domain appeared to contain the active site of the enzyme and had the ability to bind to glucosidase I-specific affinity gel. Phase partitioning with Triton X-114 indicated the amphiphilic nature of the native enzyme, consistent with its location as an integral membrane protein, whereas the 39-kDa fragment partitioned in the aqueous phase, a characteristic of soluble polypeptide. These results indicate that glucosidase I is a transmembrane protein with a luminally oriented catalytic domain. Such an orientation of the catalytic domain may facilitate the sequential processing of asparagine-linked oligosaccharide, soon after its transfer en bloc by the oligosaccharyl transferase complex in the lumen of endoplasmic reticulum.
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Affiliation(s)
- K Shailubhai
- Department of Animal Sciences, University of Maryland, College Park 20742
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29
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Shailubhai K, Pukazhenthi B, Saxena E, Varma G, Vijay I. Glucosidase I, a transmembrane endoplasmic reticular glycoprotein with a luminal catalytic domain. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(18)55341-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Shailubhai K, Saxena ES, Balapure AK, Vijay IK. Studies on hormonal modulation of asparagine-linked glycoprotein biosynthesis in explant cultures of rat mammary gland. Indian J Biochem Biophys 1990; 27:425-9. [PMID: 2102486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Glucosidase I has been purified to homogeneity and polyclonal antibodies against the enzyme have been prepared. The anti-glucosidase I antibodies recognized a single band of 85 kDa on western blot at a dilution as high as 1:2000 and also inhibited the enzyme activity, suggesting the specificity of the antibodies. Con A-Sepharose binding experiment indicates that this enzyme itself is a high mannose type N-linked glycoprotein. The increase in the electrophoretic mobility of 85 kDa band following digestion with endoglycosidase H and F strengthened this observation. The presence of any O-linked sugar attached covalently to glucosidase I could not be detected by binding assays with O-linkage specific biotinylated lectins. The studies on developmental regulation suggest that the synthesis of glucosidase I is modulated with the ontogeny of the gland. Lactogenic hormones, viz. insulin, hydrocortisone and prolactin, appeared to regulate the synthesis of glucosidase I. The possible role of these hormones in the overall regulation of protein N-glycosylation has been discussed.
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Affiliation(s)
- K Shailubhai
- Department of Animal Sciences, University of Maryland, College Park 20742
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31
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Shailubhai K, Illeperuma C, Tayal M, Vijay IK. Photoaffinity labeling of glucosyltransferase of the dolichol cycle from rat mammary gland. J Biol Chem 1990; 265:14105-8. [PMID: 2143759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
UDP-Glc:dolichol phosphate glucosyltransferase from lactating rat mammary gland has been partially purified by a combination of (NH4)2SO4 fractionation, gel filtration, ion-exchange chromatography on DEAE-TSK, and affinity chromatography. The partially purified enzyme exhibited several protein bands when examined by 10% sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions; among these, a 35-kDa polypeptide was quite prominent and appeared to be enriched during purification. Photoaffinity labeling of the partially purified enzyme preparation with 5-azido-[beta-32P]UDP-Glc identified a 35-kDa polypeptide. Labeling of a solubilized enzyme preparation from crude and stripped microsomes also revealed a 35-kDa band on 10% sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Photoinsertion of the probe in this polypeptide is enhanced by the presence of dolichol phosphate and Mg2+. Competition studies with UDP-Glc, UDP-glucuronic acid, other sugar nucleotides, and Glc-1-phosphate provide evidence to validate the specificity of photoaffinity labeling. These studies indicate that this 35-kDa polypeptide is involved in the synthesis of dolichol-P-Glc in rat mammary tissue. The possibility that this polypeptide may represent glucosyltransferase has been discussed.
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Affiliation(s)
- K Shailubhai
- Department of Animal Sciences, University of Maryland, College Park 20742
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32
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Shailubhai K, Illeperuma C, Tayal M, Vijay I. Photoaffinity labeling of glucosyltransferase of the dolichol cycle from rat mammary gland. J Biol Chem 1990. [DOI: 10.1016/s0021-9258(18)77274-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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33
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Shailubhai K, Saxena ES, Balapure AK, Vijay IK. Developmental regulation of glucosidase I, an enzyme involved in the processing of asparagine-linked glycoproteins in rat mammary gland. J Biol Chem 1990; 265:9701-6. [PMID: 2190984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Glucosidase I involved in the processing of N-linked glycoproteins was purified to homogeneity from the lactating rat mammary gland. The purified enzyme exhibited a single band at 85 kDa on 10% sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions. Polyclonal antibodies raised against the enzyme recognized a similar band on Western blots and also inhibited the enzyme activity. The enzyme levels gradually increased until the midlactation stage and thereafter declined sharply during the period of postlactation. A similar profile of the levels of immunoreactive glucosidase I was observed. These findings suggest that the accumulation of glucosidase I is modulated as a function of gland ontogeny. The results on hormonal regulation of glucosidase I indicate that the synthesis of the enzyme is stimulated by a combination of insulin, hydrocortisone, and prolactin; additionally, epidermal growth factor may play a role in this regulation. The above observation was substantiated by immunoprecipitation of [35S]methionine-labeled microsomal extracts with anti-glucosidase I antibodies. The immunoprecipitation of soluble extracts from [35S]methionine-labeled tissue with anti-rat alpha-lactalbumin antibodies indicates that these hormones not only stimulate the synthesis of alpha-lactalbumin but also play an important role in its glycosylation.
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Affiliation(s)
- K Shailubhai
- Department of Animal Sciences, University of Maryland, College Park 20742
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Shailubhai K, Dong-Yu B, Saxena ES, Vijay IK. Purification and characterization of UDP-N-acetyl-D-glucosamine:dolichol phosphate N-acetyl-D-glucosamine-1-phosphate transferase involved in the biosynthesis of asparagine-linked glycoproteins in the mammary gland. J Biol Chem 1988; 263:15964-72. [PMID: 2846531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The GlcNAc-1-P-transferase that initiates the dolichol cycle for the biosynthesis of asparagine-linked glycoproteins has been purified from the lactating bovine mammary gland. After solubilization from microsomes with 0.25% Nonidet P-40, the enzyme activity was stabilized with 20% glycerol, 20 micrograms/ml phosphatidylglycerol, 5 microM dolichol phosphate, and 2.5 microM UDP-GlcNAc. The purification protocol involved (NH4)2SO4 precipitation, gel filtration on Sephacryl S-300, DEAE-TSK, and hydroxylapatite chromatography. The purified enzyme was devoid of several readily detectable glycosyltransferases of the dolichol cycle. It showed two bands (A, 50 kDa and B, 46 kDa) on sodium dodecyl sulfate-polyacrylamide gel electrophoresis after either Coomassie Blue or silver staining. Antisera (anti-A and anti-B) raised against individual bands A and B inhibited the enzyme activity in solubilized microsomes. Each of the partially purified antibodies recognizes both bands A and B on Western blots of the enzyme; with the solubilized microsomes, the antibodies also recognize an additional polypeptide of approximately 70 kDa. When radioiodinated microsomes were immunoprecipitated with anti-B and subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis, again bands of 46, 50, and 70 kDa were observed. The peptide mapping of 50 and 46 kDa bands of the purified enzyme by chemical cleavage with N-chlorosuccinimide gave similar fragmentation patterns. The results indicate that either 70 kDa band is a precursor form of the enzyme or this polypeptide, representing the native enzyme or its subunit, is proteolyzed to smaller, enzymatically active peptide(s) of 50 and 46 kDa during purification despite the inclusion of several inhibitors against serine-proteases in all buffers used for tissue homogenization and enzyme purification. A number of properties of the purified enzyme, including its specific activation by Man-P-Dol were also characterized.
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Affiliation(s)
- K Shailubhai
- Department of Animal Sciences, University of Maryland College Park 20742
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35
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Shailubhai K, Dong-Yu B, Saxena ES, Vijay IK. Purification and characterization of UDP-N-acetyl-D-glucosamine:dolichol phosphate N-acetyl-D-glucosamine-1-phosphate transferase involved in the biosynthesis of asparagine-linked glycoproteins in the mammary gland. J Biol Chem 1988. [DOI: 10.1016/s0021-9258(18)37543-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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36
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Vijay IK, Shailubhai K, Dong-Yu B, Pratta MA, Saxena S. Studies on the biosynthesis and regulation of asparagine-linked glycoproteins in the lactating mammary gland. Indian J Biochem Biophys 1988; 25:127-32. [PMID: 2846425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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37
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Saxena S, Shailubhai K, Dong-Yu B, Vijay IK. Purification and characterization of glucosidase II involved in N-linked glycoprotein processing in bovine mammary gland. Biochem J 1987; 247:563-70. [PMID: 3122729 PMCID: PMC1148450 DOI: 10.1042/bj2470563] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Glucosidase II is an endoplasmic-reticulum-localized enzyme that cleaves the two internally alpha-1,3-linked glucosyl residues of the oligosaccharide Glc alpha 1----2Glc alpha 1----3Glc alpha 1----3Man5-9GlcNAc2 during the biosynthesis of asparagine-linked glycoproteins. We have purified this enzyme to homogeneity from the lactating bovine mammary gland. The enzyme is a high-mannose-type asparagine-linked glycoprotein with a molecular mass of approx. 290 kDa. Upon SDS/polyacrylamide-gel electrophoresis under reducing conditions, the purified enzyme shows two subunits of 62 and 64 kDa, both of which are glycosylated. The pH optimum is between 6.6 and 7.0. Specific polyclonal antibodies raised against the bovine mammary enzyme also recognize a similar antigen in heart, liver and the mammary gland of bovine, guinea pig, rat and mouse. These antibodies were used to develop a sensitive enzyme-linked immunosorbent assay for glucosidase II.
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Affiliation(s)
- S Saxena
- Department of Animal Sciences, University of Maryland, College Park 20742
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38
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Shailubhai K, Pratta MA, Vijay IK. Purification and characterization of glucosidase I involved in N-linked glycoprotein processing in bovine mammary gland. Biochem J 1987; 247:555-62. [PMID: 3322267 PMCID: PMC1148449 DOI: 10.1042/bj2470555] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Glucosidase I, the first enzyme involved in the post-translational processing of N-linked glycoproteins, was purified to homogeneity from the lactating bovine mammary tissue. The enzyme was extracted by differential treatment of the microsomal fraction with Triton X-100 and Lubrol PX. The solubilized enzyme was subjected to affinity chromatography on Affi-Gel 102 with N-5-carboxypentyldeoxynojirimycin as ligand and DEAE-Sepharose CL-6B chromatography. Purified glucosidase I shows a molecular mass of 320-330 kDa by gel filtration on Sephacryl S-300. SDS/polyacrylamide-gel electrophoresis under reducing conditions indicates a single band of approx. 85 kDa, indicating that the native enzyme is probably a tetrameric protein. Several criteria, including pH optimum of 6.6-7.0, specific hydrolytic action towards Glc3Man9GlcNAc2, to release the terminally alpha-1,2-linked glucosyl residue, and total lack of activity towards Glc1Man9GlcNAc2 and Glc2Man9GlcNAc2 saccharides, which are the biological substrates for processing glucosidase II, and 4-methylumbelliferyl alpha-D-glucopyranoside show the non-lysosomal origin and the processing-specific role of the purified enzyme. The enzyme does not require any metal ions for its activity. Hg2+, Ag+ and Cu2+ are potent inhibitors of the enzyme; this inhibition can be reversed by adding an excess of dithiothreitol. Among the saccharides tested, kojibiose (Glc alpha 1----2Glc) was inhibitory to the enzyme. Polyclonal antibodies raised against the enzyme in rabbit were found to be specific for glucosidase I, as revealed by Western-blot analysis and by immunoadsorption with Protein A-Sepharose. Anti-(glucosidase I) antibodies were cross-reactive towards a similar antigen in solubilized microsomal preparations from liver, mammary gland and heart from the bovine, guinea pig, rat and mouse.
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Affiliation(s)
- K Shailubhai
- Department of Animal Sciences, University of Maryland, College Park 20742
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Shailubhai K, Sahasrabudhe S, Vora K, Modi V. Degradation of chlorinated derivatives of phenoxyacetic acid and benzoic acid byAspergillus niger. FEMS Microbiol Lett 1983. [DOI: 10.1111/j.1574-6968.1983.tb00492.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Shailubhai K, Rao NN, Modi VV. Degradation of benzoate & salicylate by Aspergillus niger. Indian J Exp Biol 1982; 20:166-8. [PMID: 7106859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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