f Cell migration is a fundamental biological function, critical during development and regeneration, whereas deregulated migration underlies neurological birth defects and cancer metastasis. MARCKS-like protein 1 (MARCKSL1) is widely expressed in nervous tissue, where, like Jun N-terminal protein kinase (JNK), it is required for neural tube formation, though the mechanism is unknown. Here we show that MARCKSL1 is directly phosphorylated by JNK on C-terminal residues (S120, T148, and T183). This phosphorylation enables MARCKSL1 to bundle and stabilize F-actin, increase filopodium numbers and dynamics, and retard migration in neurons. Conversely, when MARCKSL1 phosphorylation is inhibited, actin mobility increases and filopodium formation is compromised whereas lamellipodium formation is enhanced, as is cell migration. We find that MARCKSL1 mRNA is upregulated in a broad range of cancer types and that MARCKSL1 protein is strongly induced in primary prostate carcinomas. Gene knockdown in prostate cancer cells or in neurons reveals a critical role for MARCKSL1 in migration that is dependent on the phosphorylation state; phosphomimetic MARCKSL1 (MARCKSL1 S120D,T148D,T183D ) inhibits whereas dephospho-MARCKSL1 S120A,T148A,T183A induces migration. In summary, these data show that JNK phosphorylation of MARCKSL1 regulates actin homeostasis, filopodium and lamellipodium formation, and neuronal migration under physiological conditions and that, when ectopically expressed in prostate cancer cells, MARCKSL1 again determines cell movement. M ARCKS-like protein 1 (MARCKSL1) is an actin binding protein that is predominantly expressed in immature brain (1, 27). The MARCKSL1 homologue MARCKS has been more extensively studied and has been shown to bind actin with a stoichiometry of 1:2, thereby facilitating cross-linking (56; reviewed in reference 39). Binding to actin occurs via an effector domain (ED) that is 87% identical to the corresponding domain of MARCKSL1. Surprisingly, however, full-length MARCKSL1 does not cross-link F-actin (49; reviewed in reference 39), although the MARCKSL1 effector domain alone interacts with actin. This indicates that in a physiological context, another level of regulation is required for MARCKSL1 to regulate actin bundling. The only known critical function of MARCKSL1 is in early development of the nervous system, as genetic disruption of MARCKSL1 results in neural tube closure defects (5, 51), events that depend on coordinated control of actin functions, cell shape, and cell migration. MARCKSL1 is also associated with cell spreading (23); however, the mechanism whereby MARCKSL1 regulates F-actin in a cellular context has remained obscure.c-Jun N-terminal kinase 1 (JNK1) and JNK2, like MARCKSL1, are required for neural tube closure (20,36). However, the identity of the JNK effectors mediating this event remains unresolved. JNK activity is highly elevated in neuronal cells (8,42), and although initially unexpected (7,8,53), it is now accepted that a number of important physiological substrates fo...

The neuronal ceroid lipofuscinoses (NCLs or Batten disease) are a group of inherited, fatal neurodegenerative disorders of childhood. In these disorders, glial (microglial and astrocyte) activation typically occurs early in disease progression and predicts where neuron loss subsequently occurs. We have found that in the most common juvenile form of NCL (CLN3 disease or JNCL) this glial response is less pronounced in both mouse models and human autopsy material, with the morphological transformation of both astrocytes and microglia severely attenuated or delayed. To investigate their properties, we isolated glia and neurons from Cln3-deficient mice and studied their basic biology in culture. Upon stimulation, both Cln3-deficient astrocytes and microglia also showed an attenuated ability to transform morphologically, and an altered protein secretion profile. These defects were more pronounced in astrocytes, including the reduced secretion of a range of neuroprotective factors, mitogens, chemokines and cytokines, in addition to impaired calcium signalling and glutamate clearance. Cln3-deficient neurons also displayed an abnormal organization of their neurites. Most importantly, using a co-culture system, Cln3-deficient astrocytes and microglia had a negative impact on the survival and morphology of both Cln3-deficient and wildtype neurons, but these effects were largely reversed by growing mutant neurons with healthy glia. These data provide evidence that CLN3 disease astrocytes are functionally compromised. Together with microglia, they may play an active role in neuron loss in this disorder and can be considered as potential targets for therapeutic interventions.Electronic supplementary materialThe online version of this article (10.1186/s40478-017-0476-y) contains supplementary material, which is available to authorized users.

This first analysis of CAH in routine UK healthcare suggests that patients with CAH have increased mortality, depression and healthcare utilisation and low treatment adherence.

Objectives: Congenital adrenal hyperplasia (CAH) is a group of rare autosomal-recessive disorders that arise from genetic deficiencies in key enzymes involved in cortisol synthesis. The burden of CAH has never been comprehensively reviewed; this literature review was conducted to summarise the existing burden of illness evidence available for these patients. Methods: A structured, comprehensive literature review was conducted to identify articles describing the burden and treatment landscape of CAH. Literature databases (MEDLINE, Embase, the Cochrane Library and EconLit), websites and conference proceedings were searched. Searches were performed in 2016 and updated in June 2020; eligible articles presented evidence for patients with CAH or paediatric patients with adrenal insufficiency (AI), for ≥1 topic of interest (epidemiology; natural history; clinical characteristics; humanistic, caregiver and economic burden; treatment options; or clinical guidelines). The evidence presented here focusses on the humanistic and economic burden of CAH in adults. Results: A total of 3,711 citations were identified and 336 were included; 84 references reported humanistic or economic burden data relevant to adult patients with CAH. 51 publications were identified reporting patient symptoms, comorbidities and cardiometabolic risk factors; 38 reporting on the impact of CAH on health-related quality of life (HRQL); 5 reporting patient views and 2 reporting economic burden associated with CAH. Compared to the general population, adult patients with CAH were found to be significantly shorter, have poorer bone health, increased levels of obesity, impaired male and female fertility, higher blood pressure and cholesterol levels, have more psychiatric and neurological disorders and have poorer cognitive performance. Adult patients with CAH were also found to have greater insulin resistance and higher levels of type 2 diabetes (T2D). CAH patients are also at risk of adrenal crisis, which contributes to excess mortality. The reported HRQL in adults with CAH varies, with increased impairment observed in more severe forms of CAH, and challenges due to living with a chronic disease impacting HRQL varying according to sex. “Sick day rules” where patients need to double or triple treatment doses, have a significant impact on patients’ HRQL and also have an impact on patients’ resource use, with a UK study reporting that CAH patients will implement these rules 171 times over their lifetime, and be hospitalised for adrenal crises on 11 occasions. CAH was also found to have a significant economic impact, with significantly higher annual healthcare costs compared to matched controls (p=0.007 for patients aged 18–40 years; p<0.001 for patients aged ≥40 years). Conclusions: This comprehensive review highlights that CAH in adults is associated with a significant humanistic and economic burden.