A new era for monoclonal antibodies with applications in neurology (Review).

Medical research continues to focus on developing specific treatment strategies, including biological products that are effective and have a good safety profile. Due to their novelty, an updated overall view is offered on some neurological diseases which benefit from monoclonal antibodies (mAbs), for better treatment in clinical decisions. An extensive literature review was performed using PubMed with the following search terms: 'monoclonal antibodies' and 'history of monoclonal antibodies' and 'monoclonal antibodies in neurology'. The following information was collected: the era before the discoveries of mAbs, the stage of implementation of biotechnologies for mAbs, and the clinical trials submitted at https://clinicaltrials.gov/ with patients suffering from neurological diseases treated with mAbs. Since 2004, mAbs have been used to treat several neurological diseases, yielding new therapeutic perspectives: natalizumab, alemtuzumab and ocrelizumab for multiple sclerosis, eculizumab for myasthenia gravis, erenumab and frenazumab for migraine, galcanezumab for migraine and cluster headache, eculizumab for neuromyelitis optica spectrum disorder. As in other cases, drug repurposing is applied to monoclonal antibodies, saving time and money. These innovative therapies are more effective and can treat previously untreatable diseases. As better understanding of the pathogenic mechanisms of neurological diseases is gained, additional mAbs are expected to be developed at a lower cost and with better safety profile compared with current treatment options.

SARS-CoV-2, multiple sclerosis, and focal deficit in a postpartum woman: A case report.

SARS-CoV-2 infections raise many practical concerns in a woman with multiple sclerosis (MS) during the perinatal period. On the other hand, the impact of COVID-19 on patients with MS and disease-modifying therapies (DMTs) is unknown. We report on a female patient who was treated with interferon beta 1a (IFNB-1a) for many years for relapsing-remitting multiple sclerosis (RRMS) until December 2018. She developed COVID 19 infection in April 2020, after giving birth to a healthy baby girl, five weeks before. She developed a mild right hemiparesis 2 weeks later, without cold symptoms. On admission, PCR for SARS-CoV-2 was positive, and she received antivirals and corticotherapy. One month later, specific IgG and IgM antibodies were negative. The patient did not develop immunity to COVID-19 infection. This report raises several problems. The focal deficit could be a real relapse or a pseudo-relapse due to SARS-CoV-2 and postpartum patient vulnerability. The treatment options in this particular case raise many challenges. The absence of antibodies after a SARS-CoV-2 infection raises a big question over the acquired immunity, the increased risk of reinfection, and the subsequent evolution of MS. The standard of care for a woman with MS and COVID-19 infection during the postpartum period must be explored and more precise recommendations must be established in the future.

Vaccination in multiple sclerosis - Challenging practices (Review).

Infections are an ever-present problem in the medical community, even more so for patients with multiple sclerosis (MS), for whom these infections have been linked to relapses and neurological disabilities. Even though it was believed that MS can be caused by an infection, research does not support this theory. MS is a chronic inflammatory disease considered to be autoimmune. Vaccination is proven to be one of the most effective means to prevent infections, but still it is surrounded by controversy in the general populations, as well as in the MS group. Vaccines are generally considered safe for MS patients. The exceptions from this, which turn into contraindications, are a medical history of allergic reactions to one of the vaccine components and immunosuppressed patients in the particular case of live vaccines. Given the presumed autoimmunity of the disease, some medication for MS is immunosuppressive and any live vaccine should be administered before starting treatment. Although there is still confusion regarding this subject, the current guidelines have clearer recommendations about vaccinations in MS patients and especially in treated MS patients.

Autonomic dysfunctions in multiple sclerosis: Challenges of clinical practice (Review).

Multiple sclerosis, demyelinating, inflammatory, degenerative, and chronic disease, raises many challenges in terms of disease management. The autonomic nervous system is affected by neuroinflammation but also contributes to its maintenance and the evolution of the disease. Multiple sclerosis interfering with parasympathetic or sympathetic modulation may influence the immune response. Less attention is paid to autonomic dysfunctions, although they produce a serious impact on the quality of life. In addition to motor disabilities, patients also have non-motor dysfunctions. Regardless of its clinical forms, patients with multiple sclerosis may have autonomous disturbances such as bladder, sexual, cardiovascular, thermoregulatory, gastrointestinal dysfunction and fatigue. These must be identified based on medical history, clinical symptoms, and specific paraclinical tests. In addition to the multitude of immunomodulatory therapeutic agents that influence the progression of the disease, the therapy of autonomic dysfunctions remains difficult to address. However, their identification and treatment lead to increased quality of patient management and avoid complications of this disease.

Multiple sclerosis, human herpesvirus 4 and thyroid collision tumor: A case report.

The role of interferon ß-1b (IFNß-1b), used for multiple sclerosis (MS) therapy, in cancer occurrence is uncertain. There is evidence supporting the role of human herpesvirus 4 [Epstein-Barr virus (EBV)] in thyroid cancer and MS. Simultaneous occurrence of papillary and medullary carcinomas is rare, and its association with MS in a young woman raises questions. A 46-year-old female patient was diagnosed with relapsing-remitting multiple sclerosis in 2008. In 2018, cervical MRI detected a thyroid nodule with right cervical adenopathy. Her thyroid function was normal, but increased calcitonin levels were found (70.53 pg/ml; normal value: <9.82 pg/ml). EBV serology tested positive. Paraclinical studies ruled out multiple endocrine neoplasia syndrome. Whole thyroid resection with whole cervical lymph node dissection was performed. To our knowledge, this is the first case that describes an association between MS and thyroid collision tumors. Histological examination ascertained both papillary and medullary thyroid cancer. After surgery, the calcitonin level normalized, and the patient received a therapeutic dose of iodine-131. IFNß-1b therapy was discontinued. The coexistence of thyroid cancers in MS patients could be explained by immune-mediated inflammation. Although EBV is not the only agent responsible for the development of MS or thyroid cancers, it could be considered a contributory factor in our case. Further research on EBV involvement in the occurrence of simultaneous immune pathologies in various organs is needed to confirm these data.