Effects of Origanum majorana on Breast Cancer Cells: An Alternative to Chemotherapy?

Recent studies have reported several beneficial effects of natural compounds on cancerous cells, highlighting their use for future treatments. These preliminary findings have encouraged experiments with natural substances, such as plant extracts, to examine both cytotoxic and mitogenic effects and find alternative treatments for diseases such as breast cancer. This study examines the effects of microwave-assisted and ethanol maceration of marjoram (Origanum majorana) on MCF-7 breast cancer cell lines and normal breast tissue cell lines used as controls. Marjoram extracts displayed a cytotoxic effect on the MCF-7 cell lines and a mitogenic effect on the control cell lines at the MTS test. The metabolic profiles of MCF-7 and control cell lines were also assessed using the Biolog Phenotype Mammalian Metabolic (PM-M) platform and revealed statistically significant differences in the utilization of energy sources, metabolic activity in the presence of certain ionic species, and responses to metabolic effectors, such as stimulant/catabolic compounds and steroid hormones. Exposure to marjoram extracts exerted positive effects on the MCF-7 cells on the abnormal utilization of energy sources and the responses to metabolic effectors, while no major effects were detected on control cells. These effects were compared to the metabolic impact of the chemotherapeutic agent doxorubicin, which showed profound cytotoxic effects on both cancerous and normal breast cells. In conclusion, our in vitro evidence indicates that marjoram extracts are a promising alternative to chemotherapy in breast cancer since they can successfully eliminate cancerous cells by affecting their metabolic capacity to proliferate without inducing noticeable adverse effects on normal breast tissue.

Sleep disturbances in Phelan-McDermid syndrome: Clinical and metabolic profiling of 56 individuals

Phelan-McDermid Syndrome (PMS) is caused by deletions at chromosome 22q13.3 or pathogenic/likely pathogenic SHANK3 variants. The clinical presentation is extremely variable and includes global developmental delay/intellectual disability (ID), seizures, neonatal hypotonia, and sleep disturbances, among others. This study investigated the prevalence of sleep disturbances, and the genetic and metabolic features associated with them, in a cohort of 56 individuals with PMS. Sleep data were collected via standardized observer/caregiver questionnaires, while genetic data from array-CGH and sequencing of 9 candidate genes within the 22q13.3 region, and metabolic profiling utilized the Biolog Phenotype Mammalian MicroArray plates. Sleep disturbances were present in 64.3% of individuals with PMS, with the most common problem being waking during the night (39%). Sleep disturbances were more prevalent in individuals with a SHANK3 pathogenic variant (89%) compared to subjects with 22q13.3 deletions of any size (59.6%). Distinct metabolic profiles for individuals with PMS with and without sleep disturbances were also identified. These data are helpful information for recognizing and managing sleep disturbances in individuals with PMS, outlining the main candidate gene for this neurological manifestation, and highlighting potential biomarkers for early identification of at-risk subjects and molecular targets for novel treatment approaches.

Stratification of a Phelan-McDermid Syndrome Population Based on Their Response to Human Growth Hormone and Insulin-like Growth Factor

Phelan-McDermid syndrome (PMS), caused by pathogenic variants in the SHANK3 gene or 22q13 deletions, is characterized by intellectual disability, autistic features, developmental delays, and neonatal hypotonia. Insulin-like growth factor 1 (IGF-1) and human growth hormone (hGH) have been shown to reverse neurobehavioral deficits in PMS. We assessed the metabolic profiling of 48 individuals with PMS and 50 controls and determined subpopulations by taking the top and bottom 25% of responders to hGH and IGF-1. A distinct metabolic profile for individuals with PMS showed a reduced ability to metabolize major energy sources and a higher metabolism of alternative energy sources. The analysis of the metabolic response to hGH or IGF-1 highlighted a major overlap between both high and low responders, validating the model and suggesting that the two growth factors share many target pathways. When we investigated the effect of hGH and IGF-1 on the metabolism of glucose, the correlation between the high-responder subgroups showed less similarity, whereas the low-responders were still relatively similar. Classification of individuals with PMS into subgroups based on responses to a compound can allow an investigation into pathogenic mechanisms, the identification of molecular biomarkers, an exploration of in vitro responses to candidate drugs, and eventually the selection of better candidates for clinical trials.

Sleep and Phelan-McDermid Syndrome: Lessons from the International Registry and the scientific literature

Background

Sleep is essential to maintaining a healthy life. Sleep disturbances among individuals with neurodevelopmental disorders are not well studied, affecting their early detection and treatment. Sleep disturbances in individuals with Phelan–McDermid Syndrome (PMS) are among the primary concerns reported by parents. However, little research has been aimed at addressing their concern.

Methods

The purpose of this investigation was to identify and quantify specific sleep disturbances in people with PMS by analyzing data collected by the PMS Foundation International Registry.

Results

The registry shows that 284 out of 384 (73.4%) individuals with confirmed chromosome 22q13 deletions or SHANK3 pathogenic variants have a sleep disturbance. The prevalence of sleep disturbances increases with age with 56% reporting a sleep disturbance in the 0–3 year age group and 90% reporting these disturbances in those over age 18 years old. The primary sleep disturbances were circadian rhythm sleep disorders that included difficulty falling asleep, frequent nighttime awakenings, difficulty returning to sleep after a nighttime awakening event, and hypersomnia and parasomnias including enuresis, night terrors, sleepwalking, and sleep apnea. Sleep disturbances were similarly frequent among individuals with SHANK3 pathogenic variants (84.8%) and those with deletions (71.9%), supporting the role of haploinsufficiency of SHANK3 in sleep.

Conclusion

Sleep disturbances are a common feature of PMS and should be considered in clinical evaluation and management because of the effect they have on the quality of life of the patients and their families.