Introduction: Plant growth regulators (PGRs), especially gibberellic acid (GA3), are used to increase the production and the availability of the plants all the year. Silymarin has recently been reported to be a neuroprotective agent against much neurologic diseases. Aim: To investigate the effects of GA3 treatment during late pregnancy and early postnatal periods on the rat's cerebellar cortex of lactating mothers and their pups. Besides, to detect the possible protective-role of silymarin. Materials and Methods: Thirty (30) pregnant rats were randomly divided equally into three groups; control group (received distilled water orally daily from 14th day of the pregnancy until day 14 after delivery), GA3-treated group (received GA3 orally daily in a dose of 55 mg/Kg body weight from 14th day of the pregnancy until day 14 after delivery) and GA3/ silymarin-treated group (received GA3 orally daily in a dose of 55mg/ Kg body weight for the same periodconcomitantly with silymarin at a dose of 100 mg/kg body weight). At the end of experimental period, lactating mothers and their pups (two weeks old) were anesthetized, sacrificed, their cerebella were processed for histological and immunohistochemical evaluation. Morphometric studies and statistical analyses were conducted. Results: GA3 induced cerebellar cortex histological and immunohistochemical insults in the form of disturbed architecture, degenerative changes, vacuolization, blood vascular dilatation and strong positive GFAP immunoreactive cells with longer and thicker processes. These insults were markedly ameliorated in GA3/silymarin-treated rats. Conclusion: Administration of silymarin might protect against GA3 induced cerebellar neurotoxicity.

Epilepsy is one of the most common neurological disorders, its prevalence approximately from 0.5% to 2% of the general population. Generalized seizures could lead to several morphological changes in the brain. This study aimed to investigate the morphological effects of a single convulsive dose of pentylenetetrazol (PTZ) on rat dentate gyrus at different postnatal ages. Thirty-six male Wistar rats were used at the following postnatal ages: P10, P21, and P90 (12 rats per each age). The animals in each age were equally divided into two groups: group I, control and group II, treated with a single intraperitoneal injection of PTZ (55 mg/kg). After confirmation of generalized tonic-clonic seizures, specimens from the right dentate gyrus were processed for light and electron microscopy. In PTZ-treated groups, the number of granule cells significantly decreased. Dark granule cells appeared in the deep layers of the granule cells in P10 and with the progress of age, they significantly increased in number and extended into the superficial layers of the granule cells. The dendritic spines diminished. Glial fibrillary acidic protein and caspase-3 expression increased. Ultrastructurally, granule cells showed irregular shaped nucleus, dilated rough endoplasmic reticulum (RER) cisternae, mitochondria with damaged cristae, large vacuoles, lysosomes, and lipofuscin granules. Dark granule cells characterized by electron-dense nucleus and cytoplasm containing disorganized Golgi bodies, swollen mitochondria with damaged cristae, numerous free ribosomes and few long strands of RER. Astrocytes had hypertrophied cell body. Acute treatment with PTZ-induced epileptic seizures caused toxic effect on the structure of rat dentate gyrus at different postnatal ages.

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To our knowledge, this is the first study which investigates the induction of neuroinflammation in rats using an acidic-saline model of fibromyalgia. It is well known that the hippocampus has a fundamental role in pain perception, and astrocytes play a crucial role in pain signaling. Our aim is to evaluate the ability of dexmedetomidine to attenuate the inflammatory responses induced in astrocytes. In a group of healthy rats, induction of chronic muscle pain by intramuscular injection of 100 µL of acidic saline on days 0 and 5 resulted in peripheral sensitization (measured using the von Frey test) and significant (p < 0.05) increases in IL-1β (160.2 ± 1.1 to 335.2 ± 1.8), IL-6 (100.1 ± 1.4 to 202.4 ± 1.1), and TNF-α (60.0 ± 0.7 to 115.5 ± 1). Light and electron microscopy revealed degenerative changes in the hippocampus and reactive astrogliosis. Immunohistochemistry showed increased expression of glial fibrillary acid protein and inducible nitric oxide synthase. Surprisingly, treatment with a single dose of an α₂-adrenergic agonist, dexmedetomidine (5 µg/kg i.p.), attenuated these changes. This trial suggests that dexmedetomidine possibly directly acts on astrocytes, and a peripheral action is also suggested.

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Background Worldwide research anticipates that a current shortage of rheumatologists will exacerbate over the next decade, whereas the need for arthritis specialists will continue to escalate. Saudi Arabia (SA) also encounters a limited geographical distribution of rheumatologists and rheumatology fellowship training centres. Objective Reporting the Saudi rheumatologists’ advisory meeting conducted in Makkah, SA in January 2020 with the aim to discuss the “Saudi Vision 2030” for rheumatology training programs. Materials and Methods A meeting of Saudi rheumatology experts and consultants was conducted to address the future directions, challenges, and recommendations of rheumatology training. The 10th Rheumatology Practice Symposium was organised by Alzaidi Chair of Research in Rheumatic Diseases (ZCRD), and conducted in Makkah Commerce Chamber, Makkah, SA on January 28, 2020. More than 30 consultants and rheumatology fellows with five Saudi experts in the field of rheumatology assembled to form 10 recommendations that tackle rheumatology training challenges in SA. Results The meeting recommendations shed light on the clinical practice of rheumatology training in SA; challenges and opportunities in rheumatology fellowship programs; efforts of the Saudi Commission for Health Specialties (SCFHS) to design and implement a competent postgraduate rheumatology training; and challenges with trainers, trainee, and within training centres. Conclusion To address rheumatology challenges in SA, rheumatology consultants and fellows assembled to form 10 recommendations. The recommendations tackled the challenges of rheumatology fellowship programs and the efforts to implement a competent postgraduate rheumatology training. These recommendations are expected to lead us successfully to fulfil our ambition in the “Saudi Vision of 2030”.

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