Iqra Mumal, MSc,  —

Iqra holds a MSc in Cellular and Molecular Medicine from the University of Ottawa in Ottawa, Canada. She also holds a BSc in Life Sciences from Queenā€™s University in Kingston, Canada. Currently, she is completing a PhD in Laboratory Medicine and Pathobiology from the University of Toronto in Toronto, Canada. Her research has ranged from across various disease areas including Alzheimerā€™s disease, myelodysplastic syndrome, bleeding disorders and rare pediatric brain tumors.

Articles by Iqra Mumal

Switching from Tysabri to Aubagio Can Help Lower Relapse Risk in MS Patients, Phase 4 Trial Shows

Stable patients with multiple sclerosis (MS) who transition from Tysabri (natalizumab) treatment toĀ Aubagio (teriflunomide) have a lower relapse risk, a new study shows. The study, ā€œReducing return of disease activity in patients with relapsing multiple sclerosis transitioned from natalizumab to teriflunomide: 12-month interim results of teriflunomide therapy,ā€…

New Compounds Offer Significant Anti-inflammatory, Neuroprotective Benefits in MS Mouse Study

Two newly identified variants of the known pharmaceutical agent chloroindazole showed significant anti-inflammatory and neuroprotective benefits in a mouse model of multiple sclerosis, a new study shows. Multiple sclerosis is an autoimmune, demyelinating disease of the central nervous system with no known cause or cure. Patients with MS characteristically show loss of the myelin sheath, a protective coat in nerve cells that helps increase cell-to-cell signaling. Several studies have suggested that estrogens ā€” a type of hormone ā€” are beneficial to the functioning of the central nervous system, and help regulate the immune system. Thus, they are attractive candidates for the treatment of MS. However, despite their potential to treat MS, estrogen-based therapies can have several undesirable side effects, such as feminizing male recipients and increasing the risk of developing breast and endometrial cancers in females. Interestingly, estrogens work by binding and activating two different types of receptors: the estrogen receptor (ER)Ī± and ERĪ². The cancer-inducing effects of estrogens are mediated mainly through estrogen receptor ERĪ±. Hence, therapies that specifically target ERĪ² can bypass these deleterious effects. Chloroindazole (IndCl), a pharmaceutical agent, has up to 100-fold relative binding affinity for ERĪ² over ERĪ±. IndCl has been shown previously to have beneficial effects on modulating the immune system and the central nervous system, and inducing myelination of nerve cells in mouse models of MS. Furthermore, IndCl and other ERĪ²-activating agents directly support the growth, differentiation (maturation), and overall myelination activity of oligodendrocytes, which are the nerve cells that produce the myelin sheath. Therefore, in order to optimize the benefits of IndCl, researchers developed and screened seven novel IndCl analogues for their ability to promote oligodendrocyte survival, growth, and differentiation. These analogues have a molecular structure closely similar to that of IndCl, but interact with estrogen receptors in subtly different ways. Among these seven compounds, researchers found two analogues ā€” IndCl-o-chloro and IndCl-o-methyl ā€” that stimulated growth and differentiation similar to the original IndCl. Next, researchers evaluated the benefits of these compounds in a mouse model of MS ā€” the experimental autoimmune encephalomyelitis (EAE) mouse model ā€” to determine whether they could alter the disease course, white matter pathology (level of demyelination), and inflammation. Results indicated that both compounds ā€œameliorated disease severity, increased mature OLs [oligodendrocytes], and improved overall myelination in the corpus callosum and white matter tracts of the spinal cord,ā€ researchers wrote. Corpus callosum is a thick band of nerves that connect the left and right side of the brain. White matter tracts connect the cortex (the largest part of the brain) with other areas in the central nervous system. These beneficial effects were accompanied by a reduced production of the toxic, inflammatory molecules interferon-Ī³ and CXCL10. Additionally, IndCl-o-methyl also reduced the levels of peripheral interleukin (IL)-17, a molecule that strongly induces inflammation. Furthermore, IndCl and both analogues upregulated the expression of a compound called CXCL1, which is associated with increased production of oligodendrocytes. Not only were these two newly identified compounds equivalent to IndCl, but the two analogues performed better in reducing disability and encouraging remyelination than the original compound, and without any obvious side effects. ā€œTheĀ o-Methyl andĀ o-Chloro IndCl analogues represent a class of ERĪ² ligands that offer significant remyelination and neuroprotection, as well as modulation of the immune system; hence, they appear appropriate to consider further for therapeutic development in multiple sclerosis and other demyelinating diseases,ā€ the researchers concluded. ā€œWe believe we created a drug that does two things really well, modulating inflammation and allowing axon remyelination. No other drug on the market can do these two things simultaneously,ā€ Seema K. Tiwari-Woodruff, said in a press releaseĀ written by Stacy Kish. Tiwari-Woodruff is the study's lead author. ā€œThe most amazing part of the study is that these new analogues of a known estrogen modulator, chloroindazole, are superior in treating mouse model of multiple sclerosis,ā€ she added. The team has patented the analogues, and hopes to begin further pharmacological and toxicity studies soon.

Lemtrada Can Lower Number of B-cells Infiltrating Nervous System and Forming Clumps, Animal Study Shows

Treating mice in a model of multiple sclerosis with Lemtrada (alemtuzumab)Ā prevented the formation of B-cell aggregates in the animals’ central nervous system and disrupted already existing ones, researchers report. The treatment alsoĀ reduced disease activity when administered at the peak of disease. The study, ā€œAnti-CD52 antibody treatment depletes B…

Kessler Foundation Scientist Receives NMSS Grant to Study Information Processing Speed in MS Patients

Kessler Foundation scientist Silvana Costa, PhD, was awarded a $477,000 grant from theĀ National Multiple Sclerosis Society (NMSS)Ā to explore the effects of visual, cognitive, and motor deficits on information processing speed in patients with multiple sclerosis (MS). Costa is an associate research scientist in neuropsychology and neuroscience research.

Tysabri Treatment Lessens Sexual Dysfunction in MS Patients, Study Finds

Treatment with Tysabri (natalizumab)Ā can help lessen sexual dysfunction in patients with multiple sclerosis (MS), a new study shows. The study, ā€œPatient perceived changes in sexual dysfunction after initiation of natalizumab for multiple sclerosis,ā€ was published in the Multiple Sclerosis Journal ā€“ Experimental, Translational and Clinical. MS is…

Non-fermentable Fiber Diet Helped Prevent MS in Mice

A diet that incorporates non-fermentable fiber ā€” a common component of a vegetarian diet ā€” during early life can help prevent the onset of autoimmune diseases such as multiple sclerosis (MS), a new study shows. The study, ā€œDietary non-fermentable fiber prevents autoimmune neurological disease by changing gut metabolic and…

Grey Matter Atrophy Common to All with MS and Follows Ordered Sequence, Study Finds

Grey matter atrophy ā€” its loss ā€” Ā follows a sequential pattern that expands to involve more regions of the brain over time in all multiple sclerosis (MS) patients, regardless of their disease type, a new study reports. Atrophy progression is also similar betweenĀ relapsing-remitting multiple sclerosisĀ (RRMS) andĀ primary-progressive multiple sclerosisĀ (PPMS)…