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Based on anecdotal evidence, the drugs of choice are those used for other idiopathic generalized epilepsies. Valproate alone, or most probably in combination with clonazepam, levetiracetam, lamotrigine or ethosuximide, appears to be the most effective regimen. The choice of the second drug depends on the main seizure type. Clonazepam is highly efficacious in eyelid myoclonia and myoclonic jerks. Of the newer antiepileptic drugs, levetiracetam may be the most effective, because of its anti myoclonic and anti photosensitive properties. Lamotrigine is very effective in absence seizures but may exaggerate myoclonic jerks.
Contra-indicated drugs are: Carbamazepine, gabapentin, oxcarbazepine, phenytoin, pregabalin, tiagabine and vigabatrin.
Lifestyle and avoidance of seizure precipitants are important. Non-pharmacological treatments used for photosensitive patients (such as wearing special glasses or the newly commercially available blue Z1 lenses) should be employed in Jeavons syndrome when photosensitivity persists.
Valproic acid is the first line drug choice for reducing generalised seizures and myoclonus. Levetiracetam is also effective for both generalised seizures and myoclonus. Clonazepam and high-dose piracetam can alleviate myoclonus. Phenytoin can worsen seizures and may speed up neurodegeneration; carbamazepine, oxcarbazepine, tiagabine, vigabatrin, gabapentin and pregabalin may worsen myoclonus and myoclonic seizures. Other common medications to treat ULD include topiramate and zonisamide. If an individual with Unverricht–Lundborg disease is particularly sensitive to a certain type of stimulus, it is also beneficial to reduce the patient's exposure to that stimulus in order to reduce the likelihood of seizures. Since ULD is progressive and may not get better over time, depression has been documented in many cases, so providing a strong support group of friends, family, and even other individuals with ULD is very beneficial.
While there is no current cure to repair the mutated CSTB gene, several antiepileptic drugs are effective in reducing seizures and helping patients with ULD to manage the symptoms. In addition, new research is being performed to examine the effectiveness of other types of treatments.
Patients with ICOE-G need prophylactic treatment mainly with carbamazepine or other antiepileptic drugs licensed for focal seizures. A slow reduction in the dose of medication 2 or 3 years after the last visual or other minor or major seizure should be advised, but if visual seizures reappear, treatment should be restored.
Jeavons syndrome is a lifelong disorder, even if seizures are well controlled with antiepileptic drugs. Men have a better prognosis than women. There is a tendency for photosensitivity to disappear in middle age, but eyelid myoclonia persists. It is highly resistant to treatment and occurs many times a day, often without apparent absences and even without demonstrable photosensitivity.
Because most patients respond to steroids or immunosuppressant treatment, this condition is now also referred to as steroid-responsive encephalopathy.
Initial treatment is usually with oral prednisone (50–150 mg/day) or high-dose IV methylprednisolone (1 g/day) for 3–7 days. Thyroid hormone treatment is also included if required.
Failure of some patients to respond to this first line treatment has produced a variety of alternative treatments including azathioprine, cyclophosphamide, chloroquine, methotrexate, periodic intravenous immunoglobulin and plasma exchange. There have been no controlled trials so the optimal treatment is not known.
Seizures, if present, are controlled with typical antiepileptic agents.
No cure is available for PSE, although the sensitivity of some patients may diminish over time. Medical treatment is available to reduce sensitivity, with sodium valproate being commonly prescribed. Patients can also learn to avoid situations in which they might be exposed to stimuli that trigger seizures and/or take steps to diminish their sensitivity (as by covering one eye) if they are unavoidably exposed. These actions together can reduce the risk of seizures to almost zero for many PSE patients.
Some PSE patients have trigger stimuli that are so specific that they are never likely to encounter them in real life. Their PSE may only be discovered by accident in an unusual situation or during examination for other complaints.
The prognosis of ICOE-G is unclear, although available data indicate that remission occurs in 50–60% of patients within 2–4 years of onset. Seizures show a dramatically good response to carbamazepine in more than 90% of patients. However, 40–50% of patients may continue to have visual seizures and infrequent secondarily generalized convulsions, particularly if they have not been appropriately treated with antiepileptic drugs.
Hemicrania continua generally responds only to indomethacin 25–300 mg daily, which must be continued long term. Unfortunately, gastrointestinal side effects are a common problem with indomethacin, which may require additional acid-suppression therapy to control.
In patients who are unable to tolerate indomethacin, the use of celecoxib 400–800 mg per day (Celebrex) and rofecoxib 50 mg per day (Vioxx - no longer available) have both been shown to be effective and are likely to be associated with fewer GI side effects. There have also been reports of two patients who were successfully managed with topiramate 100–200 mg per day (Topamax) although side effects with this treatment can also prove problematic.
Greater Occipital Nerve [GON] block comprising 40 mg Depomedrone and 10mls of 1% Lignocaine injected into the affected nerve is effective, up to a period of approximately three months. Changing the 'cocktail' to include [for example] 10mls of .5% Marcaine and changing to 2% Lignocaine, whilst in theory should increase the longevity, renders the injection completely ineffective. See 4.2 Posology and method of administration [flocculation]
Occipital nerve stimulation may be highly effective when other treatments fail to relieve the intractable pain.
The opioid antagonist naloxone allowed a woman with congenital insensitivity to pain to experience it for the first time. Similar effects were observed in Na1.7 null mice treated with naloxone. As such, opioid antagonists like naloxone and naltrexone may be effective in treating the condition.
Attacks are self-limiting, and require analgesia and NSAIDs (such as diclofenac). Colchicine, a drug otherwise mainly used in gout, decreases attack frequency in FMF patients. The exact way in which colchicine suppresses attacks is unclear. While this agent is not without side effects (such as abdominal pain and muscle pains), it may markedly improve quality of life in patients. The dosage is typically 1–2 mg a day. Development of amyloidosis is delayed with colchicine treatment. Interferon is being studied as a therapeutic modality. Some advise discontinuation of colchicine before and during pregnancy, but the data are inconsistent, and others feel it is safe to take colchicine during pregnancy.
Approximately 5–10% of FMF cases are resistant to colchicine therapy alone. In these cases, adding anakinra to the daily colchicine regimen has been successful.
In the past, treatment options were limited to supportive medical therapy. Nowadays neonatal encephalopathy is treated using hypothermia therapy.
Should the viral progression be diagnosed during stage 1 (even during late stage 1 when stage 2 symptoms start to manifest themselves) then treatment to combat the infection can be administered successfully—there is no cure for SSPE but if it is caught early enough then the sufferer can respond to the treatment and prevent symptom recurrence by taking the medication for the rest of their life. The treatment for the SSPE infection is the immunomodulator interferon and specific antiviral medication—ribavirin and inosine pranobex are specifically used to greater effect than antivirals such as amantadine.
For those who have progressed to stage 2 or beyond, the disease is incurable. For patients in the terminal phase of the disease there is a palliative care and treatment scheme—this involves anticonvulsant therapy (to help with the body's progressive loss of control of the nervous system causing gradually more intensive spasms/convulsions) alongside supportive measures to help maintain vital functioning. It is fairly standard as the infection spreads and symptoms intensify that feeding tubes need to be inserted to keep a nutritional balance. As the disease progresses to its most advanced phase, the patient will need constant nursing as normal bodily function declines to the complete collapse of the nervous system.
Combinations of treatment for SSPE include:
- Oral inosine pranobex (oral isoprinosine) combined with intrathecal (injection through a lumbar puncture into the spinal fluid) or intraventricular interferon alpha.
- Oral inosine pranobex (oral isoprinosine) combined with interferon beta.
- Intrathecal interferon alpha combined with intravenous ribavirin.
Use of intranasal decongestants (such as oxymetazoline) for more than three days leads to tachyphylaxis of response and rebound congestion, caused by alpha-adrenoceptor mediated down-regulation and desensitization of response. Oxymetazoline-induced tachyphylaxis and rebound congestion are reversed by intranasal fluticasone.
Several approaches have been taken to address tumor hypoxia. Some companies tried to develop drugs that are activated in hypoxic environments (Novacea, Inc. Proacta, Inc, and Threshold Pharmaceuticals, Inc), while others are currently seeking to reduce tumor hypoxia (Diffusion Pharmaceuticals, Inc. and NuvOx Pharma, LLC).
Several companies have tried to develop drugs that are activated in hypoxic environments. These drug candidates target levels of hypoxia that are common in tumors but are rare in normal tissues. The hypoxic zones of tumors generally evade traditional chemotherapeutic agents and ultimately contribute to relapse. In the literature, hypoxia has been demonstrated to be associated with a worse prognosis, making it a determinant of cancer progression and therapeutic response. Several review articles summarize the current status of hypoxic cytotoxins (hypoxia activated prodrugs). Companies that have tried drugs that are activated in hypoxic environments included Novacea, Inc. Proacta, and Threshold Pharmaceuticals. Novacea Inc discontinued development of its hypoxia activated drug. Proacta’s drug PR610 failed a Phase I clinical trial due to toxicity. Threshold Pharmaceuticals discontinued the hypxia activated prodrug, TH-302, after Phase III trials failed to show statistically significant overall survival.
Niacinamide, the active form of vitamin B, acts as a chemo- and radio-sensitizing agent by enhancing tumor blood flow, thereby reducing tumor hypoxia. Niacinamide also inhibits poly(ADP-ribose) polymerases (PARP-1), enzymes involved in the rejoining of DNA strand breaks induced by radiation or chemotherapy. As of August 2016, no clinical trials appear to be in progress for this indication.
Another approach to the treatment of tumor hypoxia is the use of an oxygen diffusion-enhancing compound to reoxygenate the hypoxic zones of tumors. The developer of oxygen diffusion-enhancing compounds, Diffusion Pharmaceuticals, tested its lead compound, trans sodium crocetinate (TSC), in a Phase II clinical trial in 59 patients newly diagnosed with glioblastoma multiforme. The results of the Phase II showed that 36% of the full-dose TSC patients were alive at 2 years, compared with historical survival values ranging from 27% to 30% for the standard of care. The main endpoint of the trial was survival at two years, not overall survival.
Another drug in development that is designed to reduce tumor hypoxia is NuvOx Pharma’s NVX-108. NVX-108 is a formulation of the perfluorocarbon, dodecafluoropentane (DDFPe). NVX-108 is injected intravenously, flows through the lungs and picks up oxygen, then flows through the arteries and releases oxygen in the precense of hypoxic tissue. A Phase Ib/II clinical trial is in progress for newly diagnosed glioblastoma multiforme. Early results have shown reversal of tumor hypoxia, and the trial continues to progress.
Several treatments are available, and successful control of the disease is common.
Not everyone needs treatment immediately. Treatment is usually given when the symptoms of the disease interfere with the patient's everyday life, or when white blood cell or platelet counts decline to dangerously low levels, such as an absolute neutrophil count below one thousand cells per microliter (1.0 K/uL). Not all patients need treatment immediately upon diagnosis.
Treatment delays are less important than in solid tumors. Unlike most cancers, treatment success does not depend on treating the disease at an early stage. Because delays do not affect treatment success, there are no standards for how quickly a patient should receive treatment. However, waiting too long can cause its own problems, such as an infection that might have been avoided by proper treatment to restore immune system function. Also, having a higher number of hairy cells at the time of treatment can make certain side effects somewhat worse, as some side effects are primarily caused by the body's natural response to the dying hairy cells. This can result in the hospitalization of a patient whose treatment would otherwise be carried out entirely at the hematologist's office.
Single-drug treatment is typical. Unlike most cancers, only one drug is normally given to a patient at a time. While monotherapy is normal, combination therapy—typically using one first-line therapy and one second-line therapy—is being studied in current clinical trials and is used more frequently for refractory cases. Combining rituximab with cladribine or pentostatin may or may not produce any practical benefit to the patient. Combination therapy is almost never used with a new patient. Because the success rates with purine analog monotherapy are already so high, the additional benefit from immediate treatment with a second drug in a treatment-naïve patient is assumed to be very low. For example, one round of either cladribine or pentostatin gives the median first-time patient a decade-long remission; the addition of rituximab, which gives the median patient only three or four years, might provide no additional value for this easily treated patient. In a more difficult case, however, the benefit from the first drug may be substantially reduced and therefore a combination may provide some benefit.
In a patient fully withdrawn from opioids, going back to an intermittent schedule or maintenance dosing protocol, a fraction of the old tolerance level will rapidly develop, usually starting two days after therapy is resumed and, in general, leveling off after day 7. Whether this is caused directly by opioid receptors modified in the past or affecting a change in some metabolic set-point is unclear. Increasing the dose will usually restore efficacy; relatively rapid opioid rotation may also be of use if the increase in tolerance continues.
Cladribine (2CDA) and pentostatin (DCF) are the two most common first-line therapies. They both belong to a class of medications called purine analogs, which have mild side effects compared to traditional chemotherapy regimens.
Cladribine can be administered by injection under the skin, by infusion over a couple of hours into a vein, or by a pump worn by the patient that provides a slow drip into a vein, 24 hours a day for 7 days. Most patients receive cladribine by IV infusion once a day for five to seven days, but more patients are being given the option of taking this drug once a week for six weeks. The different dosing schedules used with cladribine are approximately equally effective and equally safe.
Relatively few patients have significant side effects other than fatigue and a high fever caused by the cancer cells dying, although complications like infection and acute kidney failure have been seen.
Pentostatin is chemically similar to cladribine, and has a similar success rate and side effect profile, but it is always given over a much longer period of time, usually one dose by IV infusion every two weeks for three to six months.
During the weeks following treatment the patient's immune system is severely weakened, but their bone marrow will begin to produce normal blood cells again. Treatment often results in long-term remission. About 85% of patients achieve a complete response from treatment with either cladribine or pentostatin, and another 10% receive some benefit from these drugs, although there is no permanent cure for this disease. If the cancer cells return, the treatment may be repeated and should again result in remission, although the odds of success decline with repeated treatment. Remission lengths vary significantly, from one year to more than twenty years. The median patient can expect a treatment-free interval of about ten years.
It does not seem to matter which drug a patient receives. A patient who is not successfully treated with one of these two drugs has a reduced chance of being successfully treated with the other. However, there are other options.
Duration of treatment is usually between 2 and 25 years. Earlier reports suggested that 90% of cases stay in remission after discontinuation of treatment; however, this is at odds with more recent studies which suggest that relapse commonly occurs after initial high-dose steroid treatment. Left untreated, this condition can result in coma and death.
Medications to treat CPVT include beta blockers and verapamil.
Flecainide inhibits the release of the cardiac ryanodine receptor–mediated Ca, and is therefore believed to medicate the underlying molecular cause of CPVT in both mice and humans.
Diagnosis
Originally NEMO deficiency syndrome was thought to be a combination of Ectodermal Dysplasia (ED) and a lack of immune function, but is now understood to be more complex disease. NEMO Deficiency Syndrome may manifest itself in the form of several different diseases dependent upon mutations of the IKBKG gene such as Incontinentia pigmenti or Ectodermal dysplasia.
The clinical presentation of NEMO deficiency is determined by three main symptoms:
1. Susceptibility to pyogenic infections in the form of severe local inflammation
2. Susceptibility to mycobacterial infection
3. Symptoms of Ectodermal Dysplasia
To determine whether or not patient has NEMO deficiency, an immunologic screen to test immune system response to antigen may be used although a genetic test is the only way to be certain as many individuals respond differently to the immunological tests.
Commonly Associated Diseases
NEMO deficiency syndrome may present itself as Incontinentia pigmenti or Ectodermal dysplasia depending on the type of genetic mutation present, such as if the mutation results in the complete loss of gene function or a point mutation.
Amorphic genetic mutations in the IKBKG gene, which result in the loss of gene function, typically present themselves as Incontinetia Pigmenti (IP). Because loss of NEMO function is lethal, only heterozygous females or males with XXY karyotype or mosaicism for this gene survive and exhibit symptoms of Incontinetia Pigmenti, such as skin lesions and abnormalities in hair, teeth, and nails. There are a variety of mutations that may cause the symptoms of IP, however, they all involve the deletion of exons on the IKBKG gene.
Hypomorphic genetic mutations in the IKBKG gene, resulting in a partial loss of gene function, cause the onset of Anhidrotic ectodermal dysplasia with Immunodeficiency (EDA-IP). The lack of NEMO results in a decreased levels of NF-κB transcription factor translocation and gene transcription, which in turn leads to a low level of immunoglobulin production. Because NF-κB translocation is unable to occur without proper NEMO function, the cell signaling response to immune mediators such as IL-1β, IL-18, and LPS are ineffective thus leading to a compromised immune response to various forms of bacterial infections.
Treatment
The aim of treatment is to prevent infections so children will usually be started on immunoglobulin treatment. Immunoglobulin is also known as IgG or antibody. It is a blood product and is given as replacement for people who are unable to make their own antibodies. It is the mainstay of treatment for patients affected by primary antibody deficiency. In addition to immunoglobulin treatment, children may need to take antibiotics or antifungal medicines to prevent infections or treat them promptly when they occur. Regular monitoring and check-ups will help to catch infections early. If an autoimmune response occurs, this can be treated with steroid and/or biologic medicines to damp down the immune system so relieving the symptoms.
In some severely affected patients, NEMO deficiency syndrome is treated using a bone marrow or blood stem cell transplant. The aim is to replace the faulty immune system with an immune system from a healthy donor.
Corticosteroids are the mainstay of therapy with a 90% response rate in some studies. Appropriate duration of steroid treatment is unknown and relapse often necessitates long term treatment. Various steroid sparing agents e.g. sodium cromoglycate (a stabilizer of mast cell membranes), ketotifen (an antihistamine), and montelukast (a selective, competitive leukotriene receptor antagonist) have been proposed, centering on an allergic hypothesis, with mixed results. An elimination diet may be successful if a limited number of food allergies are identified.
In recent reports, left cardiac sympathetic denervation and bilateral thoracoscopic sympathectomy have shown promising results in individuals whose symptoms cannot be controlled by beta blockers.
Bioreductive prodrugs play a significant part in dealing with these kinds of cells: they can kill the oxygen-deficient tumor cells selectively as hypoxia-activated prodrugs. Example drugs include Tirapazamine and Evofosfamide. The study of tumors in such conditions was pioneered by Dr L. H. Gray.
When functioning correctly, mains-powered fluorescent lighting has a flicker rate sufficiently high (twice the mains frequency, typically 100 Hz or 120 Hz) to reduce the occurrence of problems. However, a faulty fluorescent lamp can flicker at a much lower rate and trigger seizures. Newer high-efficiency compact fluorescent lamps (CFL) with electronic ballast circuits operate at much higher frequencies (10–20 kHz) not normally perceivable by the human eye, though defective lights can still cause problems.
The Job Accommodation Network lists reduction or elimination of fluorescent lighting as an appropriate accommodation for many conditions including epilepsy. The Canadian Department of Labour states that the newer lights are problematic for fewer people.