Neuro-immune crosstalk in drug-resistant epilepsy

CNS autoimmune response in the MAM/pilocarpine rat model of epileptogenic cortical malformation

The development of seizures in epilepsy syndromes associated with malformations of cortical development (MCDs) has traditionally been attributed to intrinsic cortical alterations resulting from abnormal network excitability. However, recent analyses at single-cell resolution of human brain samples from MCD patients have indicated the possible involvement of adaptive immunity in the pathogenesis of these disorders. By exploiting the MethylAzoxyMethanol (MAM)/pilocarpine (MP) rat model of drug-resistant epilepsy associated with MCD, we show here that the occurrence of status epilepticus and subsequent spontaneous recurrent seizures in the malformed, but not in the normal brain, are associated with the outbreak of a destructive autoimmune response with encephalitis-like features, involving components of both cell-mediated and humoral immune responses. The MP brain is characterized by blood-brain barrier dysfunction, marked and persisting CD8+ T cell invasion of the brain parenchyma, meningeal B cell accumulation, and complement-dependent cytotoxicity mediated by antineuronal antibodies. Furthermore, the therapeutic treatment of MP rats with the immunomodulatory drug fingolimod promotes both antiepileptogenic and neuroprotective effects. Collectively, these data show that the MP rat could serve as a translational model of epileptogenic cortical malformations associated with a central nervous system autoimmune response. This work indicates that a preexisting brain maldevelopment predisposes to a secondary autoimmune response, which acts as a precipitating factor for epilepsy and suggests immune intervention as a therapeutic option to be further explored in epileptic syndromes associated with MCDs.

Correlates of Caregiving Burden among Bedouin-Muslim Mothers of Children Diagnosed with Epilepsy

A paucity of research exists on caregiving burden (CB) and the factors associated with it among minority groups, such as Bedouin mothers of children diagnosed with epilepsy (CDE). The aim of this study was to explore associations between CB and care-recipients' characteristics, contextual factors, and caregivers' characteristics among those mothers.

METHODS

A total of 50 mothers completed self-report questionnaires while visiting pediatric neurology outpatient clinic centers, using valid and reliable measures.

RESULTS

Bivariate associations were found between social support, number of medications, and CB. General self-efficacy and place of residence emerged as significant predictors of caregiver burden.

CONCLUSIONS

These findings provide health professionals with a better understanding of the factors that should be assessed in order to address caregiver burden among Bedouin mothers of CDE. Understanding the unique characteristics and culture of the Bedouin community can help professionals in targeting caregivers with a lower sense of self-efficacy, and those that reside in Bedouin cities, in order to reduce their caregiving burden.