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Low-dose Naltrexone Changes Levels of Inflammatory Proteins in MS, Study Shows

Inhibition of the neuroactiveĀ opioid growth factor (OGF) alters the blood levels of important pro- and anti-inflammatory proteins in mice with multiple sclerosis (MS)-like disease. The recognition of this regulatory response may represent a new way to monitor disease progression and treatment response in MS. These findings were reported in a study published in the journalĀ Experimental Biology and Medicine, titled ā€œModulation of the OGFā€“OGFr pathway alters cytokine profiles in experimental autoimmune encephalomyelitis and multiple sclerosis.ā€ The study was led byĀ researchers at Penn State University. Understanding the underlying mechanisms involved in MS and finding ways to tackle them is crucial for improving early diagnosis, monitoring disease progression, and patient care. For many years, researchersĀ atĀ Penn StateĀ have been focused on understanding the benefits of low-dose naltrexone and its relation with OGF in health and disease, including MS. Naltrexone is marketed with the brand name ReVia, among others. This drug is used routinely off-label to treat MS and other autoimmune diseases, as it has demonstrated toĀ it can reduce fatigue, lessen pain, and confer a general feeling of well-being to patients. Its mode of action is not fully understood, but it is known to block the interaction of the neuroactive OGF with its receptor OGFr. In addition, low-dose naltrexone and OGF were shown to prevent the proliferation of active immune cells in mice with MS-like disease. To further evaluate the role of OGF and low-dose naltrexone in MS, researchers treated mice with naltrexone and analyzed its impact on blood levels of pro- and anti-inflammatory signaling proteins (cytokines). Results showed that after 10 days, MS mice had increased levels in seven out of 10 tested cytokines. Treatment with OGF or low-dose naltrexone was found to specifically increase the levels of the pro-inflammatory IL-6 cytokine, and significantly reduce the levels of anti-inflammatory IL-10 protein. Two other pro-inflammatory proteins, TNF-Ī± and IFN-Ī³, also were found to be increased in MS mice compared to healthy animals. While TNF-Ī± levels were unaltered upon OGF or low-dose naltrexone treatment, IFN-Ī³ was reduced at 10 days, but still present at higher-than-normal levels after 20 days of therapy. To validate its findings, the team analyzed the levels of the identified signaling proteins in blood samples collected from 14 MS patients and eight non-MS volunteers. Six MS patients were undergoing treatment with Copaxone (glatiramer acetate), and four of them had relapsing-remitting MS (RRMS). Four other RRMS patients and one primary progressive MS (PPMS) patient were receiving Copaxone plus low-dose naltrexone; three RRMS patients were receiving low-dose naltrexone alone. The analysis revealed that IL-10 serum values were comparable between non-MS controls and all MS patients on low-dose naltrexone alone, or Copaxone alone. Patients treated with both Copaxone and naltrexone presented a broad range of IL-10 serum values ā€œthat were significantly different from MS subjects receiving LDN [low-dose naltrexone] only,ā€ the researchers wrote. In contrast, IL-6 cytokine was found to be significantly elevated in MS patients treated only with Copaxone compared to patients receiving low-dose naltrexone alone or together with Copaxone. ā€œThese data suggest that IL-6, a pro-inflammatory marker is very responsive to OGF and LDN therapy, and thus may be involved in other mechanistic pathways associated with the OGF-OGFr axis,ā€ the researchers wrote. "Identification of inflammatory cytokines that have expression profiles mediated by OGF or LDN [low-dose naltrexone] therapy increase our panel of potential biomarkers for MS,ā€ Patricia McLaughlin, PhD, said in a press release. McLaughlin is professor of neural and behavioral sciences at Penn State, and senior author of the study. ā€œWe hope that continued research will identify more specific cytokines and allow us to assemble a reliable panel of minimally invasive biomarkers related to the etiology and progression of MS," she added. Additional long-term human and mouse studies are needed to further evaluate if IL-6 and IL-10 are ā€œappropriate markers to monitor progression of MS,ā€ the researchers emphasized. Still, the team believes this study demonstrates that at least IL-6, IL-10, TNF-Ī±, and IFN-Ī³, together with OGF, can be useful biomarkers to monitor MS. "McLaughlin and colleagues have researched OGF signaling for several decades, and this seminal discovery of dysregulation in OGF expression in MS patients, and animal models, is very exciting and could lead to prognostic biomarkers for this autoimmune disorder," concluded Steven R. Goodman, PhD, editor-in-chief of the journal in which the study was published.

New Ocrevus Data, Post-FDA Approval, Supports Range of Benefits, Genentech’s Hideki Garren Says

OcrevusĀ (ocrelizumab), Genentechā€™sĀ humanized anti-CD20 monoclonal antibody, continues to show clear evidence that it helps to slow disease progression and enable better function ā€” including in the hands and limbs ā€” ofĀ relapsing multiple sclerosis (MS)Ā and primary progressive multiple sclerosis (PPMS), latest data reveals. TheĀ first FDA-approved therapy ā€” in March…

Deep-brain Stimulation May Offer Way of Treating Fatigue in MS Patients, Pilot Study Finds

Deep-brain stimulation, a non-invasive way of targeting neurons in the cortex, can significantly ease symptoms of fatigue inĀ multiple sclerosis (MS) patients, research drawn from a clinical trial suggests. These results, published in the journalĀ Neurology: Neuroimmunology and Neuroinflammation,Ā are in an article titled ā€œSafety and preliminary efficacy of deep…

#ACTRIMS2018 ā€“ Third Course of Lemtrada Improves Relapse, Disability in MS Patients, CARE-MS II Trial Shows

Multiple sclerosis (MS) patients who experience a relapse after two courses ofĀ Lemtrada (alemtuzumab)Ā treatment showed improvements inĀ relapse rate and disability after aĀ third Lemtrada course, according to results of the CARE-MS II trial extension. The poster reporting the findings, titled ā€œEfficacy of Alemtuzumab Retreatment in Patients Who Experienced Disease Activity after…

#ACTRIMS2018 ā€“ Combo Can Stop Tysabri-related PML Infection from Worsening, Case Study Shows

A combination of an anti-viral therapy and the anti-depressive mirtazapine can stop the worsening of an infection linked to the multiple sclerosis therapyĀ Tysabri (natalizumab), a case study suggests. The infection, John Cunninghan polyomavirus, can cause a potentially fatal brain infection known as Ā progressive multifocal leukoencephalopathy, or PML. Both…

#ACTRIMS2018 – MS Therapy MD1003’s Disability Improvements Hold Over Time, Study Shows

MedDay Pharma’sĀ MD1003Ā leads to long-lasting improvements in progressive multiple sclerosis patients’ disability, a Phase 3 clinical trial follow-up study shows. Researchers presented the results at the thirdĀ Annual Americas Committee for Treatment and Research in Multiple Sclerosis ForumĀ in San Diego, Feb. 1-3. The poster presentation was titledĀ ā€œ…

#ACTRIMS2018 – Clene Nanomedicine Presents Positive Results for MS Remyelinating Therapy

Clene Nanomedicine says its pre-clinical studies demonstrate the remyelination effects of CNM-Au8, supporting its potential to treat multiple sclerosis (MS) and other demyelinating disorders. Clene presented its data in a session,Ā “Nanocrystalline Gold As a Novel Remyelination Therapeutic for Multiple Sclerosis,”Ā thatĀ took place at the third annual Americas…

#ACTRIMS2018 ā€“ Extending Tysabri Treatment Intervals May Reduce PML Risk, TOUCH Registry Data Suggest

Extending the dosing periods of Tysabri (natalizumab) treatment may help reduce the risk of progressive multifocal leukoencephalopathy, or PML, in multiple sclerosis (MS) patients infected with the JC virus, a study suggests. The study, ā€œNatalizumab Extended Interval Dosing Is Associated with a Reduction in Progressive Multifocal Leukoencephalopathy…