In recent decades, research innovations and technological advances have merged to give rise to a new field of research known as nanotechnology, in which system components are engineered and designed at the nanoscale, a measurement requiring extreme accuracy and measured in billionths of meters
[13][14]. This field can transcend conventional boundaries, allowing scientists to manipulate matter fundamentally
[15]. The advent of nanotechnology promises to revolutionize medicine in the next few decades by opening up a whole new world of possibilities that could drastically change treatment methods
[16][17]. The potential of nanotechnology to improve chemotherapy is one of the most promising aspects of its influence in the medical field
[18][19]. The traditional method of chemotherapy involves administering therapeutic agents indifferently to both diseased and healthy tissues, resulting in harmful adverse effects during treatment
[20][21]. The advent of nanotechnology promises to transcend this limitation by enabling these therapeutic agents to be controlled with unprecedented precision
[22][23][24]. Through nanoparticles, chemotherapy drugs can be delivered to the target area with high accuracy to avoid collateral tissue injuries
[25][26][27]. With a targeted delivery method, it is expected that the performance of the chemotherapy will be increased
[28][29][30]. The side effects of conventional chemotherapy will be reduced, which often cause significant health problems
[31][32][33]. Nanotechnology offers a promising avenue of innovation for treating hydatid cyst disease, which poses a formidable challenge to medical professionals
[34][35][36]. Researchers have been capable of using nanoparticles to design treatment strategies that target cysts precisely with unique properties while minimizing adverse effects on healthy tissues due to their use
[37][38][39]. With the potential to change the therapeutic landscape, this precise and efficient drug delivery system may become a saving grace for those suffering from this parasitic condition
[40][41][42][43]. Hydatid cyst disease and nanotechnology synergize to create a compelling story of hope in the face of adversity
[44][45][46][47].
2. Detection of Hydatid Cysts: Current Approaches and Limitations
To treat hydatid cysts effectively, it is crucial to detect them as soon as possible
[57][58]. Unfortunately, it is still difficult to detect this condition promptly and reliably, given its deceptive nature and existing diagnostic limitations. However, imaging techniques, such as ultrasound, are useful for providing initial insights, but can often be misinterpreted because hydatid cysts can often be confused with other cystic lesions
[59][60]. High-resolution imaging can be obtained with Computerized Tomography (CT) scans and Magnetic Resonance Imaging (MRI), though these methods are expensive and are not suitable for distinguishing cyst types
[61][62][63].
Specific antibodies against
E. granulosus antigens can be screened via serological tests, such as ELISA and Western Blotting, but these tests are also limited
[64]. Unlike ELISA, the Western Blot is more specific
[65][66]. However, it requires specialized equipment and proficiency, increasing the chance of false positives. The resemblance between hydatid cysts and other cystic lesions can complicate the diagnosis
[67]. In addition, the current screening system often detects cysts after they have already grown considerably, thus preventing early intervention that might result in better outcomes
[68].
Performing an aspiration and biopsy is often necessary to reach a definitive diagnosis
[69]. However, these procedures are not without risk, including the possibility of rupture and cyst spreading. Sometimes, even serological tests can fail, especially when dealing with inactive cysts or cysts that have calcified over the years
[70][71]. Further complicating cancer detection is the lack of advanced imaging and diagnostic technologies in areas with a low level of technology
[72]. More research is needed on hydatid cysts, and more accurate and accessible diagnostic methods are required (
Figure 1).
Figure 1. Traditional Diagnosis vs. Nanobiosensor Novelty in Hydatid Cyst Detection. A comparative representation highlights the contrast between traditional diagnostic methods and the innovative use of nanobiosensors in detecting hydatid cysts. Traditional techniques, such as imaging and serological tests, are depicted alongside the emerging nanobiosensor technology, which offers enhanced sensitivity and specificity for accurate and rapid diagnosis. This illustration underscores the potential revolution in hydatid cyst detection by nanobiosensors, promising improved early diagnosis and patient care.
3. Nanotechnology and Nanoparticle Applications
Regarding biomedical progress, nanotechnology is one of the most influential breakthroughs when it is seamlessly integrated with the multifaceted scope of veterinary medicine, particularly in the specialized and complex discipline of parasitology
[73]. It is no wonder that the medical field has experienced groundbreaking advances due to nanotechnology in recent years since it measures in nanometers, on a very small scale
[74]. Nanotechnology offers a spectacular array of possibilities to veterinary medicine, where parasitic infections still pose significant challenges
[75]. Various materials have the ability to handle the pervasive challenges of parasitic infections, each possessing distinct characteristics that contribute to their effectiveness when it comes to combating parasitic infections
[76].
Metal nanoparticles, such as gold and silver nanoparticles, are well known for their outstanding stability and ability to be easily functionalized
[77][78]. Parasitology organizations are becoming more adept at delivering targeted drugs to parasites
[79][80]. They can attach ligands that target specific parasites or host cell receptors in addition to their surface properties. Therefore, the absorption of medications and the effectiveness of treatment is enhanced
[81].
This polymeric nanoparticle made of Poly(Lactic-co-Glycolic Acid) (PLGA) and chitosan is an excellent example of a biocompatible and controlled delivery of drugs that can be used in countless applications
[82][83]. Their unique contribution involves the ability to house anthelmintic drugs and release them in a controlled manner, which ensures that medicinal agents remain compelling long enough in the body to maximize therapeutic effects
[84]. This sophisticated process results in a reduction in the dosing frequency and reduced side effects, achieving superior clinical outcomes
[85].
Liposomes are lipid-based nanoparticles that possess malleability and biocompatibility among their most notable properties
[86][87]. A versatile platform for the delivery of parasitology drugs can be developed by using these lipid ensembles
[88]. Hydrophilic and hydrophobic therapeutic compounds can be encapsulated in various ways, allowing for the development of comprehensive and efficient methods for managing parasitic diseases
[88].
Nanocapsules are one of several nanocarriers among the wide variety of nanocarriers that serve various functions. There is a protective layer surrounding lipid or polymer capsules that contain therapeutic agents
[88][89]. Utilizing this type of clever design guarantees the stability of encapsulated drugs, as well as targeted drug release, resulting in exact drug distribution right to the site of the parasite infection, providing maximum effectiveness
[90]. A delicate balance must be struck to increase treatment efficacy while reducing side effects. A powerful composition for parasitic disease management is the result. Diagnostics and treatment for veterinary parasites are set to undergo a revolution as nanotechnology and veterinary parasitology merge
[91][92]. Soon, as a result of recent developments in these fields, veterinary science and nanotechnology are predicted to continue to flourish, innovate, and, ultimately, redefine our approach to treating parasitic infections in companion animals (
Figure 2).
Figure 2. This figure shows the diverse applications of nanocarriers in the realm of parasitology. Three distinct categories of nanocarriers are featured, including metallic, polymeric, and lipid-based nanoparticles. Metallic nanoparticles, vividly exemplified by gold and silver nanoparticles, demonstrate their proficiency in targeted drug delivery, elevating treatment effectiveness by facilitating drug uptake. Polymeric nanoparticles, constructed from biocompatible materials like PLGA and chitosan, excel in controlled and sustained drug release, ultimately reducing dosing frequency and minimizing side effects. Meanwhile, lipid-based nanoparticles emerge as adaptable drug delivery platforms, adept at encapsulating hydrophilic drugs for comprehensive therapeutic approaches.
4. Revolutionizing Chemotherapy through Nanotechnology
In the past, conventional chemotherapy has been controversial because it is non-specific, often causing adverse effects on healthy tissues and resulting in limited therapeutic effectiveness
[93][94]. A new era is now underway with the advent of nanotechnology and targeted drug delivery, promising many great treatment options
[95][96]. It is possible to deliver therapeutic agents precisely at disease sites through nanoparticles, which are meticulously engineered with precise dimensions and functional groups
[97]. Regarding hydatid cysts, nanoparticles can be tailored to target cysts while bypassing healthy tissues
[98]. A nanoparticle can harmlessly pass through the intricate barriers within the host’s body
[99].
4.1. Metallic Nanoparticles
Various nanomaterials are used to encapsulate praziquantel, such as gold, silver, zinc, copper, and zinc oxide, all composed of a combination of metals, to deliver the drug through nano-based delivery systems
[100][101][102]. Materials like these function as carriers and offer intrinsic antimicrobial properties that contribute to the therapeutic effect.
According to Napooni et al. (2019), AuNPs display noteworthy protoscolicidal abilities
[103]. These gold nanoparticles can be used as an alternative treatment for cystic echinococcosis because they eliminate the side effects of chemical drugs commonly used to treat this disease. These drugs are also effective when combined with solid lipid nanoparticles that contain albendazole and praziquantel. Based on a mouse model, Jelowdar et al. (2017) found that CE’s chemoprophylaxis outperformed free albendazole and Praziquantel
[104]. It is, therefore, possible to conduct further studies by conducting clinical trials with this substance.
By synthesizing silver nanoparticles derived from
Penicillium aculeatum, Rahimi et al. (2015) displayed protoscolicidal effects against
E. granulosus [105]. The findings showed that Ag nanoparticles at all concentrations were remarkable protoscolicidal agents. Considering their biodegradability and harmless nature, these investigators believe AgNPs could be used as protoscolicidal agents.
Ag nanoparticles may help reduce the toxic effects of albendazole, the most commonly prescribed drug for treating hydatid disease. Aside from necrosis, degeneration, and steatosis, albendazole causes elevated serum hepatic enzyme levels. Nassef et al. (2019) found that encapsulating ABZ within Ag NPs makes it more potent at eliminating cystic echinococcosis
[20].
It is well documented that Ag nanoparticles, amphotericin B, hypertonic saline, and
Foeniculum vulgare essential oil have all been demonstrated to have protoscolicidal activity by Lashkarizadeh et al. (2015)
[106]. The antiparasitic activity of AgNPs has been confirmed. Protoscoleces had a maximum activity level of 4 mg/mL, and 71.6% of them had died after an hour of exposure to it.
4.2. Antiparasitic-Loaded Nanodrugs
Nanostructured delivery methods are becoming increasingly popular to enhance the therapeutic effect of pharmaceutical agents and improve their bioavailability
[107]. There is potential for a significant improvement in clinical efficacy and bioavailability due to a revolution in medical technology
[108]. Nano-based formulations of albendazole and mebendazole, two widely used anthelmintic drugs, have been found to have promising results in treating hydatid cyst disease
[109][110][111].
By applying ABZ sulfoxide-loaded chitosan-PGLA NPs produced by nanoprecipitation, Darvishi et al. (2020) demonstrated their utility in vivo
[35]. A comparison was conducted between hemodialysis-treated cysts and sham surgery-treated cysts, and it was found that hemodialysis showed impressive therapeutic effects. As a result, the authors concluded that the mixture of ABZ sulfoxide-loaded chitosan-PGLA nanoparticles can assist in managing hydatid cyst disease in mice. The effects of ZrO
2 nanoparticles on
E. granulosus protoscoleces have been examined in a similar setting by Ibrahim (2020)
[112]. Upon 60 min of incubation, ZrO
2 NPs at 1000, 2000, and 4000 g/mL exhibited a notable contribution to the death of parasites in vivo. The specific delivery of the medication at the cyst site makes it both more efficient and minimizes collateral damage, which is one of the main downsides of conventional chemotherapy. Conventional chemotherapy is less discomforting by targeting the drug directly at the cyst. A closer look at the obstacles that hinder nanotechnology’s implementation, particularly in managing hydatid cysts, is necessary to understand its promise as a therapeutic technique
[113].
With nanotechnology available to assist with manufacturing drug carriers, researchers can accomplish several benefits, including controlled drug release, precisely directed drug delivery, and more excellent solubility, all of which circumvent the weaknesses of traditional drug administration methods
[114][115][116]. Using albendazoles and mebendazoles nanoencapsulated is a promising method of benzimidazole anthelmintics
[117]. The encapsulation of these drugs has been achieved using various nanostructured carriers, including liposomes, polymeric nanoparticles, and lipid nanoparticles
[118]. This significantly improves drug stability, circulation, and sustained release. It is possible to protect albendazole and mebendazole from rapid degradation by nanoencapsulation. In addition, nanoencapsulation makes it more likely for albendazole and mebendazole to accumulate selectively at the site of action. Further, praziquantel can also be implemented into nanoformulations to combat hydatid cysts, which play a crucial role in treating helminthic infections.
There are several mechanisms by which NPs are associated with antiparasitic activity, including the induction of apoptosis
[119][120][121]. In an in vitro study, Naseri et al. (2016) evaluated albendazole sulfoxide and albendazole sulfoxide-loaded poly (lactic-co-glycolic acid)-PEG against protoscoleces
[122]. In terms of apoptosis, they showed that ABZs and ABZs-loaded PLGA-PEG induced the cell death of protocoleces with oligonucleosomal DNA fragmentation. As a method for assessing whether these ABZs induce apoptosis in protoscoleces, caspase-3 mRNA synthesis by the genome of
E. granulosus was tested.
Soltani et al. (2017) have reported that solid lipid nanoparticles loaded with albendazole and albendazole sulfoxide showed superior physicochemical and controlled release properties, indicating that these particles can act as highly efficient drug delivery particles
[19]. These findings suggest that such materials might be beneficial for treating cystic echinococcosis. The synergistic administration of praziquantel-loaded nanocarriers with albendazole and mebendazole nanoformulations may improve treatment outcomes and compromise the emergence of drug resistance in hydatid cysts (
Figure 3 and
Figure 4).
Figure 3. Direct Nanoparticle-Mediated Destruction of Hydatid Cyst Protoscoleces. A visual representation illustrates nanoparticles’ direct application for the targeted destruction of protoscoleces within hydatid cysts. Nanoparticles are shown interacting with protoscoleces, leading to their effective neutralization and elimination. This approach represents a promising avenue for the selective and efficient eradication of hydatid cysts.
Figure 4. Enhanced Hydatid Cyst Treatment through Nano-Coatings. A schematic depiction showcases nano-coatings as a delivery platform for anthelmintic drugs such as albendazole, mebendazole, and praziquantel. These nano-coatings enable controlled and sustained release of the therapeutic agents, enhancing their action against hydatid cysts while minimizing systemic side effects. This innovative strategy can potentially optimize chemotherapy’s efficacy in managing hydatid cyst infections.