{"id":12473,"date":"2024-10-11T20:57:33","date_gmt":"2024-10-11T18:57:33","guid":{"rendered":"https:\/\/valintermed.com\/?p=12473"},"modified":"2024-10-11T20:57:33","modified_gmt":"2024-10-11T18:57:33","slug":"leykodistrofiya-svyazannaya-s-pol-3","status":"publish","type":"post","link":"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/","title":{"rendered":"Pol 3-associated leukodystrophy"},"content":{"rendered":"<div class=\"fpm_start\"><\/div>\n<p>Polymerase III (Pol 3)-associated leukodystrophy is a rare genetic disorder that affects the central nervous system and is characterized by progressive damage to the white matter of the brain. The disorder is caused by mutations in genes that code for proteins involved in DNA repair and RNA synthesis. Clinical manifestations include both neurological symptoms and changes in psychomotor development. From an early age, patients may exhibit ataxia, developmental delay, and various forms of intellectual disability. Research has shown that leukodystrophy has a significant impact on the quality of life of patients and their families, highlighting the importance of early diagnosis and treatment of this condition.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-flat ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Content<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 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href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%98%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%8F_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F_%D0%B8_%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B5%D1%81%D0%BD%D1%8B%D0%B5_%D0%B8%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5_%D1%84%D0%B0%D0%BA%D1%82%D1%8B\" >History of the disease and interesting historical facts<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%AD%D0%BF%D0%B8%D0%B4%D0%B5%D0%BC%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F\" >Epidemiology<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%93%D0%B5%D0%BD%D0%B5%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D0%BF%D1%80%D0%B5%D0%B4%D1%80%D0%B0%D1%81%D0%BF%D0%BE%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D1%8C_%D0%BA_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%BC%D1%83_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8E\" >Genetic predisposition to this disease<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%A4%D0%B0%D0%BA%D1%82%D0%BE%D1%80%D1%8B_%D1%80%D0%B8%D1%81%D0%BA%D0%B0_%D0%B2%D0%BE%D0%B7%D0%BD%D0%B8%D0%BA%D0%BD%D0%BE%D0%B2%D0%B5%D0%BD%D0%B8%D1%8F_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\" >Risk factors for the development of this disease<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%94%D0%B8%D0%B0%D0%B3%D0%BD%D0%BE%D1%81%D1%82%D0%B8%D0%BA%D0%B0_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\" >Diagnosis of this disease<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%9B%D0%B5%D1%87%D0%B5%D0%BD%D0%B8%D0%B5\" >Treatment<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%A1%D0%BF%D0%B8%D1%81%D0%BE%D0%BA_%D0%BB%D0%B5%D0%BA%D0%B0%D1%80%D1%81%D1%82%D0%B2_%D0%BF%D1%80%D0%B8%D0%BC%D0%B5%D0%BD%D1%8F%D0%B5%D0%BC%D1%8B%D1%85_%D0%B4%D0%BB%D1%8F_%D0%BB%D0%B5%D1%87%D0%B5%D0%BD%D0%B8%D1%8F_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\" >List of medications used to treat this disease<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%9C%D0%BE%D0%BD%D0%B8%D1%82%D0%BE%D1%80%D0%B8%D0%BD%D0%B3_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\" >Disease monitoring<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%92%D0%BE%D0%B7%D1%80%D0%B0%D1%81%D1%82%D0%BD%D1%8B%D0%B5_%D0%BE%D1%81%D0%BE%D0%B1%D0%B5%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D0%B8_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\" >Age-related features of the disease<\/a><\/li><li class='ez-toc-page-1'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/valintermed.com\/en\/medlibrary\/leukodystrophia-associated-with-pol-3\/#%D0%92%D0%BE%D0%BF%D1%80%D0%BE%D1%81%D1%8B_%D0%B8_%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B\" >Questions and Answers<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D0%98%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%8F_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F_%D0%B8_%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B5%D1%81%D0%BD%D1%8B%D0%B5_%D0%B8%D1%81%D1%82%D0%BE%D1%80%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B5_%D1%84%D0%B0%D0%BA%D1%82%D1%8B\"><\/span>History of the disease and interesting historical facts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pol 3-associated leukodystrophy was first described in the early 2000s when it was established that certain mutations in genes associated with acid synthesis and DNA polymerases lead to the development of this pathology. Interesting aspects of the history of this disease are that it remained poorly understood for a long time due to its rarity and similarity to other neurological diseases. The use of molecular genetic methods in recent decades has allowed significant progress in understanding the mechanisms of pathogenesis of leukodystrophy, as well as identifying its genetic basis, including the identification of the genes involved, which became the basis for further research and clinical diagnostics.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%AD%D0%BF%D0%B8%D0%B4%D0%B5%D0%BC%D0%B8%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F\"><\/span>Epidemiology<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pol 3-associated leukodystrophy is estimated to have a low epidemiological incidence, with an incidence of approximately 1 in 100,000 live births. However, due to the high heterogeneity of clinical manifestations and the different subtypes of the disease, this figure may vary. In addition, the level of diagnosis and awareness of health care workers about this pathology may influence the reported cases. In some areas with high inbreeding rates, the incidence may be as high as 1 in 50,000 live births. Studies show that symptoms may appear in childhood, and many patients have difficulty receiving a correct diagnosis in early life.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%93%D0%B5%D0%BD%D0%B5%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B0%D1%8F_%D0%BF%D1%80%D0%B5%D0%B4%D1%80%D0%B0%D1%81%D0%BF%D0%BE%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D1%8C_%D0%BA_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%BC%D1%83_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8E\"><\/span>Genetic predisposition to this disease<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pol 3-associated leukodystrophy is caused by mutations in several key genes, of which POLR3A and POLR3B are of particular interest. These genes encode subunits of RNA polymerase III, which is responsible for the transcription of small RNAs such as 5S ribosomal RNA. Mutations can be either homozygous or heterozygous, and result in dysfunction of these proteins. Inheritance is autosomal recessive, which poses risks to offspring if there are mutation carriers in the family. Given the various mutations within these genes, the spectrum of phenotypic manifestations can be quite diverse, which complicates diagnosis and requires careful genetic counseling.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%A4%D0%B0%D0%BA%D1%82%D0%BE%D1%80%D1%8B_%D1%80%D0%B8%D1%81%D0%BA%D0%B0_%D0%B2%D0%BE%D0%B7%D0%BD%D0%B8%D0%BA%D0%BD%D0%BE%D0%B2%D0%B5%D0%BD%D0%B8%D1%8F_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\"><\/span>Risk factors for the development of this disease<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The main risk factors for developing Pol 3-associated leukodystrophy are genetic predisposition and family history of the disease. Other risk factors include:<\/p>\n<ul>\n<li>Heredity - the presence of patients in the family can increase the likelihood of passing on the mutation to children;<\/li>\n<li>Ethnic factors - some populations may have a higher predisposition to the disease due to genetic isolation;<\/li>\n<li>Pregnancy - the presence of anomalies as a result of previously suffered infectious diseases or exposure to toxic substances during the formation of the fetus;<\/li>\n<li>Parental age - older maternal age may be associated with an increased risk of genetic abnormalities in offspring.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%D0%94%D0%B8%D0%B0%D0%B3%D0%BD%D0%BE%D1%81%D1%82%D0%B8%D0%BA%D0%B0_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\"><\/span>Diagnosis of this disease<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Diagnosis of Pol 3-associated leukodystrophy is a complex task that requires a comprehensive approach. The main symptoms may include:<\/p>\n<ul>\n<li>Neurological symptoms: ataxia, tremor, hypotension;<\/li>\n<li>Psychomotor retardation and mental retardation;<\/li>\n<li>Problems with speech development;<\/li>\n<li>Epileptic seizures.<\/li>\n<\/ul>\n<p>Laboratory tests may include:<\/p>\n<ul>\n<li>Genetic testing for mutations in the POLR3A and POLR3B genes;<\/li>\n<li>Cerebrospinal fluid analysis and bioanalytes;<\/li>\n<li>Magnetic resonance imaging to assess the condition of the white matter of the brain.<\/li>\n<\/ul>\n<p>Radiological examinations allow visualization and assessment of the extent of damage to the central nervous system. Differential diagnostics should exclude other forms of leukodystrophies and neurological disorders, such as metabolic diseases or infectious processes.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%9B%D0%B5%D1%87%D0%B5%D0%BD%D0%B8%D0%B5\"><\/span>Treatment<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Treatment of Pol 3-associated leukodystrophy currently remains symptomatic, as there is no specific therapy to remove the mutations. General treatment is aimed at improving the quality of life of patients and includes:<\/p><script data-noptimize=\"\" data-wpfc-render=\"false\">\nfpm_start( \"true\" );\n<\/script>\n\n<ul>\n<li>Pharmacological treatment to control neurological symptoms;<\/li>\n<li>Physical therapy to improve motor skills;<\/li>\n<li>Occupational therapy to support daily activities;<\/li>\n<li>Psychological and psychiatric support.<\/li>\n<\/ul>\n<p>Surgery may be indicated if serious complications such as epilepsy develop. Other approaches include alternative therapies such as art therapy and support from a dedicated team of health professionals.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%A1%D0%BF%D0%B8%D1%81%D0%BE%D0%BA_%D0%BB%D0%B5%D0%BA%D0%B0%D1%80%D1%81%D1%82%D0%B2_%D0%BF%D1%80%D0%B8%D0%BC%D0%B5%D0%BD%D1%8F%D0%B5%D0%BC%D1%8B%D1%85_%D0%B4%D0%BB%D1%8F_%D0%BB%D0%B5%D1%87%D0%B5%D0%BD%D0%B8%D1%8F_%D0%B4%D0%B0%D0%BD%D0%BD%D0%BE%D0%B3%D0%BE_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\"><\/span>List of medications used to treat this disease<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>There are currently no specific drugs for the treatment of Pol 3-associated leukodystrophy. However, the following may be used to improve the condition of patients:<\/p>\n<ul>\n<li>Anticonvulsants to control epileptic seizures;<\/li>\n<li>Neurological drugs such as midzolam;<\/li>\n<li>Drugs to improve cerebral circulation;<\/li>\n<li>Symptomatic agents - analgesics, agents for correcting muscle tone.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"%D0%9C%D0%BE%D0%BD%D0%B8%D1%82%D0%BE%D1%80%D0%B8%D0%BD%D0%B3_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\"><\/span>Disease monitoring<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Monitoring the course of leukodystrophy includes regular clinical examinations and necessary laboratory tests. Control stages usually include:<\/p>\n<ul>\n<li>Scheduled visits to a neurologist;<\/li>\n<li>Assessment of psychomotor development;<\/li>\n<li>Regular MRIs to monitor changes in brain structure;<\/li>\n<li>Monitoring side effects from prescribed medications.<\/li>\n<\/ul>\n<p>The prognosis for this leukodystrophy depends on the severity of the disease and the time of treatment. There is a risk of complications, such as dysfunction of organs and systems, which requires a comprehensive approach to treatment.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%92%D0%BE%D0%B7%D1%80%D0%B0%D1%81%D1%82%D0%BD%D1%8B%D0%B5_%D0%BE%D1%81%D0%BE%D0%B1%D0%B5%D0%BD%D0%BD%D0%BE%D1%81%D1%82%D0%B8_%D0%B7%D0%B0%D0%B1%D0%BE%D0%BB%D0%B5%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F\"><\/span>Age-related features of the disease<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Pol 3-associated leukodystrophy can manifest in various age groups, with the highest probability in childhood. In newborns, symptoms may not be obvious, while young children may show developmental delays and neurological impairment. In adolescents and adults, gradual but progressive signs of the disease are observed. This emphasizes the need for early diagnosis and timely initiation of rehabilitation measures.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%D0%92%D0%BE%D0%BF%D1%80%D0%BE%D1%81%D1%8B_%D0%B8_%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B\"><\/span>Questions and Answers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li><strong>What is Pol 3-associated leukodystrophy?<\/strong><br \/>\nIt is a genetic disorder that causes progressive damage to the white matter of the brain, resulting in neurological impairment and developmental delays.<\/li>\n<li><strong>What are the main symptoms of the disease?<\/strong><br \/>\nThe main symptoms include ataxia, psychomotor delay, seizures and speech problems.<\/li>\n<li><strong>How is Pol 3 associated leukodystrophy diagnosed?<\/strong><br \/>\nDiagnosis includes genetic testing, laboratory tests, and imaging of the central nervous system using MRI.<\/li>\n<li><strong>What treatment is available for patients with this condition?<\/strong><br \/>\nTreatment is symptomatic and mainly aimed at improving quality of life, including drug therapy, rehabilitation and specialist support.<\/li>\n<li><strong>What is the prognosis for patients with Pol 3-associated leukodystrophy?<\/strong><br \/>\nThe prognosis depends on the severity of the disease and the time of initiation of treatment, but without appropriate therapy, serious complications may develop.<\/li>\n<\/ul>\n<div class=\"fpm_end\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Polymerase III (Pol 3)-associated leukodystrophy is a rare genetic disorder that affects the central nervous system and is characterized by progressive<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[298],"tags":[],"class_list":["post-12473","post","type-post","status-publish","format-standard","hentry","category-medlibrary"],"_links":{"self":[{"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/posts\/12473","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/comments?post=12473"}],"version-history":[{"count":1,"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/posts\/12473\/revisions"}],"predecessor-version":[{"id":14606,"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/posts\/12473\/revisions\/14606"}],"wp:attachment":[{"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/media?parent=12473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/categories?post=12473"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/valintermed.com\/en\/wp-json\/wp\/v2\/tags?post=12473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}