Choroba niemanna-picka – Zapobieganie i profilaktyka

Choroba niemanna-picka
Zapobieganie i profilaktyka

Choroba Niemanna-Picka jest dziedziczona autosomalnie recesywnie, co oznacza, że ryzyko urodzenia dziecka z chorobą wynosi 25% przy obojgu rodzicach będących nosicielami wadliwego genu. Kluczowym elementem profilaktyki jest poradnictwo genetyczne, które umożliwia ocenę ryzyka, omówienie dostępnych badań diagnostycznych oraz opcji profilaktycznych. Diagnostyka prenatalna, obejmująca biopsję kosmówki, amniocentezę oraz badania DNA płodu, pozwala na wczesne wykrycie choroby. Testy genetyczne są dostępne dla typów A, B oraz częściowo C, co umożliwia identyfikację nosicieli i świadome planowanie potomstwa. Badania przesiewowe noworodków, choć obecnie nieopłacalne ekonomicznie, mają potencjał do poprawy wyników leczenia, zwłaszcza w typach A i B, gdzie wczesne rozpoznanie może spowolnić progresję choroby i ograniczyć powikłania.

Profilaktyka choroby Niemanna-Picka

Dziedziczenie i ryzyko genetyczne
Poradnictwo genetyczne
Badania genetyczne i wykrywanie nosicielstwa
Diagnostyka prenatalna
Badania przesiewowe noworodków
Nowe perspektywy terapeutyczne w profilaktyce wtórnej
Znaczenie wczesnej diagnostyki
Kolejne rozdziały

Profilaktyka choroby Niemanna-Picka

Choroba Niemanna-Picka to schorzenie genetyczne o dziedziczeniu autosomalnym recesywnym, dla którego obecnie nie istnieją specyficzne wytyczne dotyczące zapobiegania. Dostępne działania prewencyjne koncentrują się głównie na poradnictwie genetycznym, badaniach prenatalnych oraz wczesnej diagnostyce.¹² Mimo że choroba ta jest często śmiertelna i trudna w leczeniu, wczesne rozpoznanie daje większe szanse na spowolnienie jej progresji i ograniczenie powikłań.³⁴

Dziedziczenie i ryzyko genetyczne

Choroba Niemanna-Picka jest dziedziczona w sposób autosomalny recesywny, co oznacza, że oboje rodzice muszą być nosicielami wadliwego genu, aby przekazać chorobę potomstwu. Osoby będące nosicielami choroby autosomalnej recesywnej nie wykazują objawów choroby, ale mogą przekazać wadliwy gen następnemu pokoleniu.⁵⁶

Gdy oboje rodzice są nosicielami, przy każdej ciąży istnieje:

25% ryzyko, że dziecko urodzi się z chorobą Niemanna-Picka
50% ryzyko, że dziecko będzie nosicielem wadliwego genu bez objawów choroby
25% szansa, że dziecko nie odziedziczy wadliwego genu

⁷

Poradnictwo genetyczne

Poradnictwo genetyczne stanowi kluczowy element profilaktyki choroby Niemanna-Picka. Osoby, które cierpią na tę chorobę lub mają ją w wywiadzie rodzinnym, powinny skonsultować się z doradcą genetycznym podczas planowania potomstwa.⁸ Profesjonalne poradnictwo genetyczne pomaga rodzinom zrozumieć:

Ryzyko przekazania choroby potomstwu
Możliwości badań diagnostycznych
Dostępne opcje profilaktyczne
Konsekwencje zdrowotne dla przyszłego dziecka

⁹¹⁰

Badania genetyczne i wykrywanie nosicielstwa

Badania w kierunku nosicielstwa są możliwe tylko wtedy, gdy defekt genetyczny został zidentyfikowany. Defekty zaangażowane w typy A i B choroby Niemanna-Picka zostały dokładnie zbadane, a testy DNA dla tych form są dostępne. Również w przypadku typu C zidentyfikowano defekty genetyczne w DNA wielu pacjentów, co może umożliwić rozpoznanie osób będących nosicielami nieprawidłowego genu.¹¹

Rodzinom, które mogą być nosicielami choroby, należy zaproponować badania genetyczne. Jest to istotny element strategii profilaktycznej, pozwalający na świadome podejmowanie decyzji prokreacyjnych.¹²

Diagnostyka prenatalna

Niektóre ośrodki oferują testy umożliwiające zdiagnozowanie choroby Niemanna-Picka u płodu podczas ciąży.¹³ Diagnostyka prenatalna może obejmować:

Biopsję kosmówki
Amniocentezę
Badania DNA płodu

W niektórych częściach świata strategie zapobiegawcze obejmują badania prenatalne oraz ograniczenia w wydawaniu pozwoleń na zawarcie małżeństwa dwóm osobom z tą samą chorobą. Badania przesiewowe dzieci i kobiet w ciąży podczas wizyt lekarskich są skuteczną strategią ograniczania choroby, choć obecnie nie są jeszcze opłacalne ekonomicznie.¹⁴

Badania przesiewowe noworodków

Dla niektórych niemowląt z chorobą Niemanna-Picka wczesne wykrycie i rozpoczęcie odpowiedniego leczenia może pomóc zapobiec lub opóźnić niektóre poważne konsekwencje zdrowotne związane z tą chorobą. Istnieją dwie formy choroby Niemanna-Picka: typ A (NPD-A) i typ B (NPD-B), które różnią się pod względem ciężkości choroby i wieku wystąpienia objawów.¹⁵

Wczesne wykrycie i odpowiednie leczenie mogą pomóc poprawić jakość życia niemowląt z NPD-A i długoterminowe wyniki leczenia niemowląt z NPD-B. Z tego powodu badania przesiewowe noworodków w kierunku choroby Niemanna-Picka są tak ważne, choć należy zaznaczyć, że obecnie nie ma skutecznego leczenia zapobiegającego poważnym objawom NPD-A.¹⁶

Nowe perspektywy terapeutyczne w profilaktyce wtórnej

Choć dla choroby Niemanna-Picka typu C obecnie nie istnieje znany sposób zapobiegania, a leczenie jest głównie objawowe, pojawiają się nowe metody terapeutyczne, które mogą wpłynąć na profilaktykę wtórną poprzez spowalnianie postępu choroby.¹⁷

W badaniu fazy III wykazano, że pacjenci z chorobą Niemanna-Picka typu C, którzy otrzymywali N-acetylo-L-leucynę (NALL), substancję potencjalnie łagodzącą dysfunkcję lizosomalną i metaboliczną, wykazywali zmniejszenie objawów neurologicznych po 3 miesiącach leczenia. Jeśli neuroznacznie jest łagodzone przez leczenie NALL, poprawa kliniczna może być obserwowana w wielu, a być może wszystkich neurodegeneracyjnych lizosomowych chorobach spichrzeniowych.¹⁸

Pacjenci, u których objawy rozwijają się w późniejszym wieku, mają generalnie lepsze rokowanie, co podkreśla znaczenie wczesnej interwencji i profilaktyki wtórnej.¹⁹

Znaczenie wczesnej diagnostyki

Choroba Niemanna-Picka jest poważnym schorzeniem, które może być śmiertelne i trudne w leczeniu. Jednakże wczesne wykrycie daje lepsze szanse na spowolnienie postępu choroby i ograniczenie dodatkowych powikłań. Wczesna diagnostyka pozwala na:

Szybsze wdrożenie leczenia objawowego
Lepsze zarządzanie powikłaniami
Poprawę jakości życia pacjentów
Zastosowanie potencjalnych nowych terapii w początkowych stadiach choroby

²⁰²¹

Aby zarządzać ryzykiem związanym z chorobą Niemanna-Picka, rodzice powinni uczestniczyć w poradnictwie genetycznym i rozważyć badania genetyczne. Może to pomóc rodzinom, które mogą być nosicielami choroby, zrozumieć i przygotować się na możliwości i implikacje związane z tą genetyczną chorobą.²²

Kolejne rozdziały

Zapraszamy do dalszego czytania naszego leksykonu.

Wybierz kolejny rozdział z menu poniżej, aby otworzyć nową podstronę kompedium wiedzy i uzyskać szczegółowe informację o leku, substancji lub chorobie.

Materiały źródłowe

#1 Niemann-Pick disease and genetics | EBSCO Research Starters
https://www.ebsco.com/research-starters/consumer-health/niemann-pick-disease-and-genetics
There are no specific guidelines for preventing Niemann-Pick disease. […] Prevention measures are currently available in the areas of genetic testing and prenatal diagnosis. […] Individuals who have Niemann-Pick disease or have a family history of the disorder can talk to a genetic counselor when deciding to have children.
#2 Niemann-Pick Disease Type C: Symptoms, Causes, Treatment
https://www.healthline.com/health/niemann-pick-disease-type-c
NPD type C is a genetic disease, and there’s no known way to prevent it. […] Currently, NPD type C has no cure, and treatment is largely supportive. People with the disease generally have a better outlook when symptoms develop when they’re at an older age.
#3 Niemann-Pick Disease – StatPearls – NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK556129/
Although Niemann-Pick disease is fatal and often untreatable, the sooner it is recognized, the better is the chance to slow down its progression and limit the complications. Niemann-Pick disease is an autosomal recessive (AR) disease, which means both the parents must be affected or carriers of the genes for the disease to pass on to their children. Carrier persons of an AR disease do not show signs and symptoms of the disease, but they can pass the defective gene to the next generation. So if both the parents are carriers, each pregnancy has a 25% chance of producing a child with the disease. Parental counseling should be done, and genetic testing should be offered to families who may be carriers of the disease. […] In some parts of the world, preventive strategies include prenatal screening, restrictions on issuing marriage licenses to two people with the same disease. The screening of children and pregnant women who visit clinicians is an effective strategy to limit the disease but is not cost-effective yet.
#4 Niemann-Pick Disease – MD Searchlight
https://mdsearchlight.com/genetic-disorders/niemann-pick-disease/
Niemann-Pick disease is a serious health condition that can often be fatal and difficult to treat. However, if it is detected early, there are better chances to slow down its damage and reduce any additional complications. This disease is whats known as an autosomal recessive (AR) disease. That means that for a child to have the disease, both parents must either have it or be carriers of the genes responsible for it. […] To manage this risk, parents should take part in counseling and consider genetic testing. This can help families who might be carriers of Niemann-Pick disease to understand and prepare for the possibilities and implications. Its a crucial step in managing this genetic condition.
#5 Niemann-Pick Disease – StatPearls – NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK556129/
Although Niemann-Pick disease is fatal and often untreatable, the sooner it is recognized, the better is the chance to slow down its progression and limit the complications. Niemann-Pick disease is an autosomal recessive (AR) disease, which means both the parents must be affected or carriers of the genes for the disease to pass on to their children. Carrier persons of an AR disease do not show signs and symptoms of the disease, but they can pass the defective gene to the next generation. So if both the parents are carriers, each pregnancy has a 25% chance of producing a child with the disease. Parental counseling should be done, and genetic testing should be offered to families who may be carriers of the disease. […] In some parts of the world, preventive strategies include prenatal screening, restrictions on issuing marriage licenses to two people with the same disease. The screening of children and pregnant women who visit clinicians is an effective strategy to limit the disease but is not cost-effective yet.
#6 Niemann-Pick disease Information | Mount Sinai – New York
https://www.mountsinai.org/health-library/diseases-conditions/niemann-pick-disease
All types of Niemann-Pick are autosomal recessive. This means that both parents are carriers. Each parent has one copy of the variant gene without having any signs of the disease themselves. […] When both parents are carriers, there is a 25% chance that their child will have the disease and a 50% chance that their child will be a carrier. […] Carrier detection testing is only possible if the genetic defect is identified. The defects involved in types A and B have been well-studied. DNA tests for these forms of Niemann-Pick are available. […] Genetic defects have been identified in the DNA of many people with type C. It may be possible to diagnose people who carry the abnormal gene. […] A few centers offer tests to diagnose a baby still in the womb.
#7 Niemann-Pick disease Information | Mount Sinai – New York
https://www.mountsinai.org/health-library/diseases-conditions/niemann-pick-disease
All types of Niemann-Pick are autosomal recessive. This means that both parents are carriers. Each parent has one copy of the variant gene without having any signs of the disease themselves. […] When both parents are carriers, there is a 25% chance that their child will have the disease and a 50% chance that their child will be a carrier. […] Carrier detection testing is only possible if the genetic defect is identified. The defects involved in types A and B have been well-studied. DNA tests for these forms of Niemann-Pick are available. […] Genetic defects have been identified in the DNA of many people with type C. It may be possible to diagnose people who carry the abnormal gene. […] A few centers offer tests to diagnose a baby still in the womb.
#8 Niemann-Pick disease and genetics | EBSCO Research Starters
https://www.ebsco.com/research-starters/consumer-health/niemann-pick-disease-and-genetics
There are no specific guidelines for preventing Niemann-Pick disease. […] Prevention measures are currently available in the areas of genetic testing and prenatal diagnosis. […] Individuals who have Niemann-Pick disease or have a family history of the disorder can talk to a genetic counselor when deciding to have children.
#9 Niemann-Pick Disease – MD Searchlight
https://mdsearchlight.com/genetic-disorders/niemann-pick-disease/
Niemann-Pick disease is a serious health condition that can often be fatal and difficult to treat. However, if it is detected early, there are better chances to slow down its damage and reduce any additional complications. This disease is whats known as an autosomal recessive (AR) disease. That means that for a child to have the disease, both parents must either have it or be carriers of the genes responsible for it. […] To manage this risk, parents should take part in counseling and consider genetic testing. This can help families who might be carriers of Niemann-Pick disease to understand and prepare for the possibilities and implications. Its a crucial step in managing this genetic condition.
#10 Niemann-Pick Disease – StatPearls – NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK556129/
Although Niemann-Pick disease is fatal and often untreatable, the sooner it is recognized, the better is the chance to slow down its progression and limit the complications. Niemann-Pick disease is an autosomal recessive (AR) disease, which means both the parents must be affected or carriers of the genes for the disease to pass on to their children. Carrier persons of an AR disease do not show signs and symptoms of the disease, but they can pass the defective gene to the next generation. So if both the parents are carriers, each pregnancy has a 25% chance of producing a child with the disease. Parental counseling should be done, and genetic testing should be offered to families who may be carriers of the disease. […] In some parts of the world, preventive strategies include prenatal screening, restrictions on issuing marriage licenses to two people with the same disease. The screening of children and pregnant women who visit clinicians is an effective strategy to limit the disease but is not cost-effective yet.
#11 Niemann-Pick disease Information | Mount Sinai – New York
https://www.mountsinai.org/health-library/diseases-conditions/niemann-pick-disease
All types of Niemann-Pick are autosomal recessive. This means that both parents are carriers. Each parent has one copy of the variant gene without having any signs of the disease themselves. […] When both parents are carriers, there is a 25% chance that their child will have the disease and a 50% chance that their child will be a carrier. […] Carrier detection testing is only possible if the genetic defect is identified. The defects involved in types A and B have been well-studied. DNA tests for these forms of Niemann-Pick are available. […] Genetic defects have been identified in the DNA of many people with type C. It may be possible to diagnose people who carry the abnormal gene. […] A few centers offer tests to diagnose a baby still in the womb.
#12 Niemann-Pick Disease – StatPearls – NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK556129/
Although Niemann-Pick disease is fatal and often untreatable, the sooner it is recognized, the better is the chance to slow down its progression and limit the complications. Niemann-Pick disease is an autosomal recessive (AR) disease, which means both the parents must be affected or carriers of the genes for the disease to pass on to their children. Carrier persons of an AR disease do not show signs and symptoms of the disease, but they can pass the defective gene to the next generation. So if both the parents are carriers, each pregnancy has a 25% chance of producing a child with the disease. Parental counseling should be done, and genetic testing should be offered to families who may be carriers of the disease. […] In some parts of the world, preventive strategies include prenatal screening, restrictions on issuing marriage licenses to two people with the same disease. The screening of children and pregnant women who visit clinicians is an effective strategy to limit the disease but is not cost-effective yet.
#13 Niemann-Pick disease Information | Mount Sinai – New York
https://www.mountsinai.org/health-library/diseases-conditions/niemann-pick-disease
All types of Niemann-Pick are autosomal recessive. This means that both parents are carriers. Each parent has one copy of the variant gene without having any signs of the disease themselves. […] When both parents are carriers, there is a 25% chance that their child will have the disease and a 50% chance that their child will be a carrier. […] Carrier detection testing is only possible if the genetic defect is identified. The defects involved in types A and B have been well-studied. DNA tests for these forms of Niemann-Pick are available. […] Genetic defects have been identified in the DNA of many people with type C. It may be possible to diagnose people who carry the abnormal gene. […] A few centers offer tests to diagnose a baby still in the womb.
#14 Niemann-Pick Disease – StatPearls – NCBI Bookshelf
https://www.ncbi.nlm.nih.gov/books/NBK556129/
Although Niemann-Pick disease is fatal and often untreatable, the sooner it is recognized, the better is the chance to slow down its progression and limit the complications. Niemann-Pick disease is an autosomal recessive (AR) disease, which means both the parents must be affected or carriers of the genes for the disease to pass on to their children. Carrier persons of an AR disease do not show signs and symptoms of the disease, but they can pass the defective gene to the next generation. So if both the parents are carriers, each pregnancy has a 25% chance of producing a child with the disease. Parental counseling should be done, and genetic testing should be offered to families who may be carriers of the disease. […] In some parts of the world, preventive strategies include prenatal screening, restrictions on issuing marriage licenses to two people with the same disease. The screening of children and pregnant women who visit clinicians is an effective strategy to limit the disease but is not cost-effective yet.
#15 Niemann-Pick Disease | Baby’s First Test | Newborn Screening | Baby Health
https://www.babysfirsttest.org/newborn-screening/conditions/niemann-pick-disease
There are two forms of NPD, Niemann-Pick disease type A (NPD-A) and Niemann-Pick disease type B (NPD-B), which differ in regards to disease severity and age of onset. […] For some babies with NPD, detecting the condition early and beginning proper treatment may help prevent or delay some of the severe health outcomes associated with the condition. […] Early detection and proper treatment can help improve the quality of life in babies with NPD-A and the long term outcome of babies with NPD-B. This is why newborn screening for NPD is so important. […] At this time, there is no effective treatment to prevent the serious signs and symptoms of Niemann-Pick disease type A (NPD-A).
#16 Niemann-Pick Disease | Baby’s First Test | Newborn Screening | Baby Health
https://www.babysfirsttest.org/newborn-screening/conditions/niemann-pick-disease
There are two forms of NPD, Niemann-Pick disease type A (NPD-A) and Niemann-Pick disease type B (NPD-B), which differ in regards to disease severity and age of onset. […] For some babies with NPD, detecting the condition early and beginning proper treatment may help prevent or delay some of the severe health outcomes associated with the condition. […] Early detection and proper treatment can help improve the quality of life in babies with NPD-A and the long term outcome of babies with NPD-B. This is why newborn screening for NPD is so important. […] At this time, there is no effective treatment to prevent the serious signs and symptoms of Niemann-Pick disease type A (NPD-A).
#17 Niemann-Pick Disease Type C: Symptoms, Causes, Treatment
https://www.healthline.com/health/niemann-pick-disease-type-c
NPD type C is a genetic disease, and there’s no known way to prevent it. […] Currently, NPD type C has no cure, and treatment is largely supportive. People with the disease generally have a better outlook when symptoms develop when they’re at an older age.
#18 Potentially Protective Agent Shows Benefit in Niemann-Pick Type C | MedPage Today
https://www.medpagetoday.com/neurology/generalneurology/108518
Patients with Niemann-Pick disease type C who received N-acetyl-L-leucine (NALL), an agent that potentially ameliorates lysosomal and metabolic dysfunction, showed reduced neurologic signs and symptoms after 3 months, a phase III crossover trial found. […] „In this trial, patients with Niemann-Pick type C had a significant reduction in neurologic signs and symptoms during the period they were receiving NALL, as compared with the period they were receiving placebo,” Bremova-Ertl and co-authors wrote. […] „If neuroinflammation is attenuated by treatment with NALL, clinical improvement may be seen in many and perhaps all neurodegenerative lysosomal storage disorders,” observed Cynthia Tifft, MD, PhD, of the National Human Genome Research Institute in Bethesda, Maryland, in an accompanying essay.
#19 Niemann-Pick Disease Type C: Symptoms, Causes, Treatment
https://www.healthline.com/health/niemann-pick-disease-type-c
NPD type C is a genetic disease, and there’s no known way to prevent it. […] Currently, NPD type C has no cure, and treatment is largely supportive. People with the disease generally have a better outlook when symptoms develop when they’re at an older age.
#20 Niemann-Pick Disease – MD Searchlight
https://mdsearchlight.com/genetic-disorders/niemann-pick-disease/
Niemann-Pick disease is a serious health condition that can often be fatal and difficult to treat. However, if it is detected early, there are better chances to slow down its damage and reduce any additional complications. This disease is whats known as an autosomal recessive (AR) disease. That means that for a child to have the disease, both parents must either have it or be carriers of the genes responsible for it. […] To manage this risk, parents should take part in counseling and consider genetic testing. This can help families who might be carriers of Niemann-Pick disease to understand and prepare for the possibilities and implications. Its a crucial step in managing this genetic condition.
#21 Niemann-Pick Disease | Baby’s First Test | Newborn Screening | Baby Health
https://www.babysfirsttest.org/newborn-screening/conditions/niemann-pick-disease
There are two forms of NPD, Niemann-Pick disease type A (NPD-A) and Niemann-Pick disease type B (NPD-B), which differ in regards to disease severity and age of onset. […] For some babies with NPD, detecting the condition early and beginning proper treatment may help prevent or delay some of the severe health outcomes associated with the condition. […] Early detection and proper treatment can help improve the quality of life in babies with NPD-A and the long term outcome of babies with NPD-B. This is why newborn screening for NPD is so important. […] At this time, there is no effective treatment to prevent the serious signs and symptoms of Niemann-Pick disease type A (NPD-A).
#22 Niemann-Pick Disease – MD Searchlight
https://mdsearchlight.com/genetic-disorders/niemann-pick-disease/
Niemann-Pick disease is a serious health condition that can often be fatal and difficult to treat. However, if it is detected early, there are better chances to slow down its damage and reduce any additional complications. This disease is whats known as an autosomal recessive (AR) disease. That means that for a child to have the disease, both parents must either have it or be carriers of the genes responsible for it. […] To manage this risk, parents should take part in counseling and consider genetic testing. This can help families who might be carriers of Niemann-Pick disease to understand and prepare for the possibilities and implications. Its a crucial step in managing this genetic condition.