Why Iron Deficiency is Worse Than We Thought? Parasites Consume Iron!
Iron plays an indispensable role in the survival and growth of nearly all living organisms, even parasites. This trace element is central to various cellular processes such as respiration, photosynthesis, and DNA synthesis. Despite its abundance, iron is not very bioavailable because it has low solubility at physiological pH and has toxicity in oxygen-rich environments. Consequently, iron is typically bound to proteins, which creates the need for a delicate balance in its regulation within organisms.
In host-parasite interactions, a battleground is waged over iron availability. Parasites have evolved sophisticated mechanisms to tap into host iron sources, considering these as virulence determinants. The host, in turn, uses complex iron-withholding strategies to thwart the parasite's attempts. This ongoing struggle forms the backbone of several research investigations that explore how various parasites manipulate iron acquisition to their advantage.
Research Studies on How Parasites Use Iron
Leon-Sicairos et al. provide a minireview on the multifaceted strategies employed by intracellular pathogens to secure iron from their host's intracellular environment. These pathogens exploit iron for replication, often residing within macrophages and other immune cells. The study highlights how these intracellular microorganisms circumvent host defenses, such as phagocytosis and lysosomal disruption, to survive and thrive. The implications of these iron acquisition strategies extend to understanding the host-pathogen relationship, potentially informing future therapeutic interventions.
Iron-Homeostasis and Trypanosoma brucei
The review "Iron-Homeostasis and Trypanosoma brucei Associated Immunopathogenicity Development: A Battle/Quest for Iron," by B. Stijlemans et al., discusses the strategies Trypanosoma brucei employs to modulate iron homeostasis as part of its immune evasion tactics. This parasitic protozoan causes African trypanosomosis, a significant disease in developing countries. The study elaborates on how the parasite triggers an immune response that results in iron deprivation by affecting the host's myeloid phagocytic system. This manipulation contributes to the development of trypanosomosis-associated anemia.
Trichomonas vaginalis and Iron Response
In the review article "Trichomonas vaginalis Cysteine Proteinases: Iron Response in Gene Expression and Proteolytic Activity" by R. Arroyo et al., researchers examined how Trichomonas vaginalis, a protozoan parasite, modulates gene expression and proteolytic activity in response to iron availability. The study highlights how iron influences the regulation and function of cysteine proteinases (CPs), which are associated with the parasite's virulence. Notably, iron regulates CP gene expression at multiple levels—transcriptional, posttranscriptional, and posttranslational—implying a sophisticated control mechanism. The research hints at potential epigenetic and miRNA processes that might further influence this regulation, offering insights into how a limited set of genes from a large family are expressed in response to iron.
Transferrin Endocytosis and Cell Signaling in Parasitic Protozoa
The article "Transferrin: Endocytosis and Cell Signaling in Parasitic Protozoa," by M. Reyes-López et al., explores the mechanisms through which protozoan parasites acquire iron from the host. The study identifies specific transferrin receptors on the parasite's plasma membrane and compares the signal transduction processes initiated upon ligand binding in parasites to those in mammalian cells. The research emphasizes the involvement of several signaling pathways, including those mediated by inositol-1,4,5-triphosphate, diacylglycerol, MAPK, and growth factors in transferrin trafficking. By identifying components of these pathways in parasites, the study provides potential targets for chemotherapeutic interventions aimed at disrupting iron acquisition.
These studies underscore the intricate strategies parasites deploy to acquire iron, a critical element for their survival and pathogenicity. By unraveling these mechanisms, researchers provide valuable insights that could inform the development of targeted therapies to combat parasitic infections. For those interested in the broader implications of iron homeostasis within host-parasite dynamics, these studies offer a robust foundation for understanding and addressing the challenges posed by parasitic diseases.
The Biggest Risk: Multiple Parasite Infections or Polyparasitism
In recent years, epidemiological research has experienced a renaissance in studying polyparasitism, particularly with a focus on multiple helminth species and Plasmodium-helminth co-infections. These studies have shown that polyparasitism is more common than previously thought, occurring at different frequencies than expected under independent assumptions. The interactions between parasites in humans can be synergistic or antagonistic, potentially increasing the intensity of infections and leading to greater morbidity.
This article examines the nutritional and pathological consequences of polyparasitism, focusing on soil-transmitted helminth infections, schistosomiasis, and Plasmodium spp. infections, as these are prevalent in the developing world and significantly impact human health.
Understanding Polyparasitism and Its Impacts
Polyparasitism refers to concurrent infections with multiple parasite species within a single host. Epidemiological studies have revealed that this is often the norm rather than an exception. Individuals infected with multiple helminth species tend to experience the most intense infections. Such co-infections can lead to increased susceptibility to other infections and exacerbate morbidity. The health impacts of these combined infections remain insufficiently studied despite their potential significance for public health.
Nutritional Consequences of Polyparasitism
Parasitic infections pose a significant threat to nutrition, particularly in developing regions. Helminth and malaria infections affect host nutrition through various mechanisms, including:
- Chronic Blood Loss: Intestinal parasites, such as hookworms, can cause significant blood loss, leading to anemia.
- Malabsorption: Parasites like Ascaris lumbricoides can induce physiological abnormalities in the intestine, impairing nutrient absorption.
- Inflammatory Responses: Increased inflammatory cytokines from infections like malaria can induce catabolic responses and contribute to protein-energy malnutrition (PEM).
Impact on Growth and Development
One of the most concerning aspects of polyparasitism is its impact on growth and development, particularly in children. Growth stunting affects a significant portion of children under five in developing countries. Soil-transmitted helminths and schistosome infections contribute to impaired growth due to malnutrition. Malaria also plays a role, with its inflammatory responses leading to anorexia and nutrient deficiencies.
Nutritional Deficiencies Caused by Polyparasitism
Polyparasitism can lead to various nutritional deficiencies, including:
- Iron Deficiency Anemia: Chronic blood loss from intestinal parasites results in iron deficiency, reducing hemoglobin levels and impairing oxygen transport in the body.
- Protein-Energy Malnutrition (PEM): Parasitic infections can induce anorexia and catabolic responses, leading to insufficient protein intake and energy production.
- Vitamin and Mineral Deficiencies: Malabsorption and reduced food intake can result in deficiencies of essential vitamins and minerals, affecting overall health and development.
Who is Most at Risk?
Age-infection profiles highlight those most at risk of polyparasitism. School-aged children are particularly vulnerable to co-infections, while pregnant women are also at risk. Adults can harbor multiple parasitic species, albeit at reduced intensity. Understanding these age-specific susceptibilities can aid in targeted interventions.
Polyparasitism presents a significant challenge to global health, particularly in regions where parasitic infections are endemic. The nutritional consequences of concurrent infections are profound, leading to growth impairments and deficiencies that impact physical and cognitive development. Addressing polyparasitism requires a comprehensive approach that includes improved sanitation, access to healthcare, and targeted nutritional interventions.
Further studies are needed to fully understand the complex relationships between multiple parasite infections and nutrition.
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Sources
Pullan R, Brooker S. The health impact of polyparasitism in humans: are we under-estimating the burden of parasitic diseases? Parasitology. 2008 Jun;135(7):783-94. doi: 10.1017/S0031182008000346. Epub 2008 Mar 27. PMID: 18371242; PMCID: PMC2645487.
Natalie, there is no such thing as bi-polar. that is a label! NO human should be on drugs. There are natural ways to help your son. Get him to a natural nutritionist, see what Dr. Berg says as well. Check out (very important) https://www.cchr.org/ There are many ways to get rid of parasites & things like depression. Drugs & psychs are not a great choice. Forget insurance. Your son is too important for that…
Is it ok to take supplements with a lot of plant iron if one has parasites?
hi Natalie,
have you heard of dr. Dietrich klinghaardt? he’s an amazing doctor…I believe you can find him at Sophia institute in the northwest…he recommends ozonated myrrh oil available through ki science in germany as the best thing for toxoplasmosis and he may have many other ways to treat your son…good luck with it…love
I suspect my son may have toxoplasmosis from playing (in childhood – he’s now 36 years old) in a filthy old barn where feral cats, bats, skunks, raccoons, possums, etc. hung out and dropped their feces. He has bipolar disorder. Several times, I have tried giving him the parasite cleanse, and each time within a week of starting the program he ended up spiraling into a serious manic episode and was hospitalized. He is under supervision of a psychiatrist and a primary care physician who doesn’t consider parasite testing warranted. Lab tests for t.gondii are not covered by insurance. Is there a treatment that works for killing off t. gondii or any other parasites associated with bipolar?
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