Introduction

Lung cancer is a malignant disease that is a public problem facing the world and is growing at an alarming rate every year (Liu et al. 2023). Globally, there are an estimated 2 million new cases and 1.76 million deaths per year (Thai et al. 2021). When it comes to lung cancer, we usually think it is closely related to smoking. From the data of the studies, we know that without intervention in smoking, the risk of lung cancer in boys will be 9.6%., and the risk of lung cancer in girls would be 4.3% (Villeneuve and Mao 1994). However, lung cancer is much more than smoking, it is also associated with differences in geography, ethnicity, gender, socioeconomic and social class. In addition, environmental factors such as industrial toxins and exhaust pollution are also risk factors for the development of lung cancer (de Sousa and Carvalho 2018; Raman et al. 2022). It is evident that it is extremely urgent to overcome the challenge of lung cancer treatment technology. Like most tumors, lung cancer consists of molecular subtypes and clonal stages with different characteristics and is a heterogeneous disease (de Sousa and Carvalho 2018), which is the reason why lung cancer cannot be well-controlled with a single therapy. Usually, the treatment cycle of lung cancer is long and complex and may involve multiple therapeutic approaches, such as surgery, radiotherapy, chemotherapy, immunotherapy, targeted drugs, etc. (Vinod and Hau 2020). In recent years, the emergence of nanotechnology has greatly improved the therapeutic effect of different treatment modalities for lung cancer patients. Many studies have shown that nanoparticle-based drug delivery systems provide a promising platform for the targeted delivery of traditional chemotherapy drugs and new small molecule therapeutic agents (Doroudian et al. 2021). This is because the traditional delivery mode of immune drugs to tumor cells is oral or intravenous injection, which leads to the spread of drugs throughout the body. More or less, there will be a low concentration of drugs in tumor cells and the accumulation of drugs in normal tissues to destroy normal tissues. The enhanced permeability and retention effect of nanoparticles make nanoparticles accumulate more in tumor tissues, so nanomedicine opens up more possibilities for drug delivery (Suzuki and Cheung 2015). Therefore, with the progress of medical technology and medical level, doctors are no longer obsessed with cytotoxic treatment methods, but adopt personalized treatment plans (Herbst et al. 2018). The application of nanoparticles not only improves the therapeutic index of lung cancer but also reduces the drug dose required. Nanodrug delivery systems also offer the advantages of precise control of drug release, thereby reducing toxic side effects, controlling biodistribution and accelerating effects or reactions.

Background of lung cancer and treatment modalities

Background

According to the traditional classification of lung cancer, it can be divided into non-small cell carcinoma (NSCLC) and small cell carcinoma (SCLC), of which NSCLC accounts for 85%, SCLC accounts for 15% (Zhang et al. 2018). In clinical practice, chemotherapy is the mainstay of first-line treatment for metastatic small cell carcinoma, using a combination of Etoposide or Irinotecan with platinum, and chest radiation therapy should be promptly administered to patients without metastases. Unfortunately, few second-line agents are approved, and although Topotecan is the standard second-line option, it is also not available for all patients due to its mediocre efficacy and severe hematologic toxicity (Yang et al. 2019). Over the years, some progress has been made in immunotherapy for SCLC, and a review by Sen Yang et al. mentioned that Nivolumab, Pembrolizumab, Atezolizumab, and Durvalumab significantly improved the outcome of SCLC. Therefore, the future outlook for SCLC lies in new approaches to the integration of immunotherapy and small molecule TKI (Tyrosine kinase inhibitor) drugs (Yang et al. 2019). Common subtypes of NSCLC include large cell carcinoma, lung squamous carcinoma (LUSC) and lung adenocarcinoma (LUAD). LUAD is a rare and aggressive tumor that occurs in the lung and gastrointestinal tract in most cases, and platinum-based therapy combined with Etoposide or Irinotecan remains the first-line treatment option (Masso-Valles et al. 2020). Although patients with LUSC represent a minority in clinical practice and are rarely talked about in targeted therapies, because LUSC does not produce frequent drug target mutations and has a more durable immune response, LUAD predominates in lung cancer and most lung cancer patients are classified as lung adenocarcinoma (Herbst et al. 2018; Imyanitov et al. 2021). For patients with NSCLS, if N2 lymph node involvement can be detected during surgery, we can define them as early stage, which can be classified as stage I, II and IIIA, and surgical radical treatment is usually recommended in this case (Alexander et al. 2020). For stage III patients, who are candidates for non-surgical patients, the current standard is concurrent radiotherapy followed by immunotherapy (Alexander et al. 2020). In clinical practice, for stage II and IIIA patients, adjuvant platinum-based chemotherapy is recommended, which has been shown to reduce mortality but has a relatively high rate of eventual recurrence and cytotoxicity (Pignon et al. 2008). Therefore, a multifaceted and multidisciplinary reflection and discussion should be carried out before treatment to achieve the best therapeutic outcome. In recent years, targeted therapies have gradually come into the public eye, and their combination with immunotherapy has led to significant improvements in the treatment of some patients with advanced NSCLC (Herbst et al. 2018).

Targeted therapy

There are many proteins on the surface of lung cancer cells, such as the EGFR family, ALK, ROS1, MET, RET, NTRK, etc., and when they are mutated, they are the best targeting sites. Therefore, a series of rapidly develo** drugs are directed against them (Table 1). The epidermal growth factor receptor (EGFR) is a membrane receptor from the tyrosine kinase group (Rodak et al. 2021), which is a key regulator of cell proliferation, differentiation, division, survival, and cancer development (Qin et al. 2019). Therefore, it is recognized as the most potent target site (Dong et al. 2019). ROS1 is closely related to cell differentiation and growth, and when it undergoes rearrangement it is suggested to be associated with cancer development (Rimkunas et al. 2012). Since ROS1 has a similar structure to ALK, Crizotinib was also used in cancers caused by ROS1 mutations, but of course resistance inevitably emerged. The poor intracranial permeability of Crizotinib led to the development of intracranial metastases in a proportion of NSCLC patients in advanced stages, which was a major cause of death (Patil et al. 2018). Then, Entretinib and Lorlatinib were clinically used, although it also has low general efficacy and high side effects including neurological and cardiovascular disease (Rodak et al. 2021). MET plays a driving role in a proportion of patients with lung cancer development (Mitiushkina et al. 2019). Clinical inhibitors targeting MET mutation, such as Capmatinib, Tepotinib, have some therapeutic effect on MET-induced NSCLC but unfortunately do not have a significant response rate. RET protein is a membrane tyrosine kinase receptor whose translocation leads to NSCLC. The drugs targeting RET protein clinically include Cabozantinib, Vandetanib and Sunitinib, which also face some problems, such as low survival. Mutations in the NTRK1 (Neurotrophic Receptor Tyrosine Kinase 1) gene are also involved in tumor transformation, and the immune-targeted drugs such as entrectinib and Larotrectinib are clinically used (Imyanitov et al. 2021; Rodak et al. 2021).

Table 1 Studies on targeted therapy for lung cancer
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Through the above introduction, we can understand that no matter what type of lung cancer is seriously harmful to human life and health, different types of lung cancer treatment methods are not the same, but they are all develo** towards the trend of combined treatment and individualized treatment. From the summary of the treatment modalities available so far, it is evident that immunotherapy, when combined with targeted therapy, solves many clinical problems and greatly improves the survival rate of the disease. However, there are still many problems that need to be solved, such as the maximum efficacy of drugs due to poor permeability, the toxicity of drugs that damage other normal tissues except tumor cells, and the high metabolism of cancer cells, which reduce the efficacy of drugs. To solve these problems, it is necessary to start from the drug delivery system, and to have a deep understanding of the tumor immune tumor microenvironment (Wang et al. 2020). These urgent problems need to be solved due to the emergence of nanotechnology, which brings new benefits to patients with lung cancer. If immune targeted therapy is used based on the advantages of nanoparticles, it will achieve more superior therapeutic effects.

Properties of nanoparticles and their applications in tumors

With the development of nanotechnology and medical technology, nanoparticles can be composed of different components, Below we will introduce several commonly used nanoparticles (Table 2).

Table 2 Diverse types of nanoparticles
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Polymer nanoparticles

Polymeric nanoparticles are substances with the sizes between 1 and 1000 nm, which include nanospheres, nanocapsules, and polymeric micelles (Woodman et al. 2021). Nanospheres have a core and an exterior composed of polymeric material, and the drug can be retained inside or adsorbed on the exterior surface; nanocapsules are a core–shell form with aqueous or oily cavities, and usually the drug is confined and surrounded by a polymer shell, which controls the release of the drug from the core at specific locations (Zielinska et al. 2020). Polymeric micelles have a core–shell structure composed of amphiphilic block copolymers which can be self-assembled in an aqueous phase environment. The core of polymeric micelles is hydrophobic, in which water-insoluble drugs can be harbored and show good drug stability. Some water-insoluble drugs had been successfully delivered with it (Majumder et al. 2020). The hydrophobic core can also be adjusted according to the optimal hydrophobic/lipophilic balance, size, stability of body circulation, drug-carrying capacity, etc. Compared to conventional drug delivery methods, nanosized micelles not only can escape renal rejection but also have better endothelial permeability. In addition, micelles can be more accurately localized to tumor tissue (Ghosh and Biswas 2021). In 2005, Abraxane entered the drug market as the first polymeric nanodrug. Similarly, two polymeric micelles named K911 and NK105, respectively, containing Adriamycin and Paclitaxel, were also introduced to the drug market (Aghebati-Maleki et al. 2020). β-Lapachone (β-lap) is a novel anticancer drug biologically activated by NAD(P)H:quinone oxidoreductase 1, which is specifically overexpressed in non-small cell lung cancer. Elvin Blanco et al. reported that the drug stability, bioavailability and targeted delivery of bioactivator β-lap can be achieved using biocompatible nanocarrier polymeric micelles. The small size of the β-lap micelles allows a good release of the drug in the tumor tissue. In mice bearing subcutaneous A549 lung tumors, the micelles-delivered β-lap concentrations were significantly prolonged in tumor tissue, resulting in delayed tumor growth and increased survival (Blanco et al. 2010). Sankha Bhattacharya’s study showed that polymeric nanoparticles conjugated with anti-EGFR monoclonal antibody and 5-fluorouracil (5-FU) had higher cellular uptake and higher cytotoxicity, and thereby have a good therapeutic effect on EGFR-positive colorectal cancer (Bhattacharya 2021). In addition, as a novel therapy polymeric nanoparticles was used to deliver low solubility and low bioavailability polyphenols for the treatment of skin cancers, such as melanoma (Vittala Murthy et al. 2022) (Table 2).

Liposomes

Ordinary liposomes are bilayer spheres formed by self-assembly of amphiphilic molecules which heads are hydrophilic, and the tails are hydrophobic. In liposome the hydrophilic substances can be encapsulated in the hydrophilic core and the hydrophobic molecules can be encapsulated in the lipid bilayers. This amphiphilic property makes liposomes the choice for delivery of the drugs with different polarities (Large et al. 2021). In 1961, Bangham and Horne first described liposomes at the Babraham Institute in Cambridge, which opened the prelude to the study of liposomes (Sforzi et al. 2020). In fact, liposomes are the simplest biological cell mimics, and their main components include lipids and fatty acids, which are also present in cell membranes, so liposomes are considered to have good biocompatibility and biodegradability. Because of these properties, liposomes have been widely studied as carriers for drug delivery to tumor tissues. The pH value is one of the commonly used factors to stimulate liposomes. Acid-sensitive liposome components, such as fatty acylethanolamine (PE) or its derivatives, when exposed to an acidic environment, will lead to changes in the liposome structure, making the liposome structure change for drug release. The pH of tumor tissue is between 5.7 and 7.0, and the pH of normal human tissue is between 7.4 and 7.5, which provides a good opportunity for liposomes to release drugs in tumor tissue (Sang et al. 2021). Liposomes can be classified based on the size. Small unilamellar vesicles (SUVs) range in size from 20 to 100 nm; large unilamellar vesicles (LUVs) range in size from 100 to 1000 nm; Oligolamellar vesicles (OLVs) are between 100 and 1000 nm in size; multilamellar vesicles (MLVs) are larger than 500 nm in size; giant unilamellar vesicles (GUVs) are larger than 1000 nm in size; The multivesicular size of the bubbles can be from 1000 nm to several thousand nanometers (Sforzi et al. 2020). The use of liposome drug delivery systems in immunotherapy was divided into five categories by Zili Gu et al. First, it can be used for vaccine delivery to improve efficacy; second, it normalizes the tumor microenviroment by overcoming the tumor-driven immunosuppressive signals; Third, it modulates the tumor; fourth, it targets overexpressed surface molecules on tumor; fifth, it is combined with other treatments to form a combination therapy (Gu et al. 2020). It has been shown that the incorporation of up-conversion nanoparticles (UCNPs) and IR-1048 organic dye (NIR-II, 1000–1700 nm) into aptamer-modified lipid nanostructures (UCILA) can be used as computed tomography (CT) contrast agent to monitor the metabolic changes of lung cancer and to feedback the temperature of photothermal therapy (PTT) (Xu et al. 2021). As early as 1995, Doxil, a liposomal preparation of an anticancer drug doxorubicin, was approved by the FDA for the first time in the treatment of ovarian cancer and AIDS-related Kaposi’s sarcoma (Barenholz 2012). Over the years, increased liposome drug delivery systems have been used in clinical practice. Onivyde, a nanoliposomal formulation of Irinotecan, plays a huge role in malignancies, such as pancreatic, esophageal, gastric, and colorectal cancers, and was further recommended for patients with advanced solid tumors through clinical trials (Zhang 2016). Compared with traditional Irinotecan, Onivyde can better protect the drug, increase the concentration of the drug in tumor tissue and reduce the toxicity of host cells. Vyxeos® (CPX-351), a drug approved for the treatment of acute myeloid leukemia, is a liposomal form of Daunorubicin and Cytarabine, and clinical trial patients receiving Vyxeos® have shown a similar increase in survival. Compared with the conventional treatment group, the survival time was improved by about 4 months. The above three liposome-delivered drugs have been approved by the FDA for clinical use since 2015 (Almeida et al. 2020). In addition, Onpattro®, a recently approved liposomal therapy for the treatment of transthyretin-mediated (ATTR) amyloidosis, is a double-stranded siRNA formulated into lipid nanoparticles targeted to primary synthetic Hepatocytes at the site of TTR to inhibit the synthesis of TTR (Urits et al. 2020). The potential of polymeric lipid nanoparticles as drug delivery vehicles was further illustrated in the article by James C Kaczmarek et al. using polymeric lipid nanoparticles to deliver DNA or mRNA to lung endothelial cells (Kaczmarek et al. 2021). In one study, the use of podophyllotoxin-loaded lipid bilayer nanoparticles inhibited the production of death ligand 1 in lung cancer cells, not only reducing systemic toxicity, but also exhibiting immune and antitumor effects (Wang et al. 2022a, b). Liposome formulations of chemotherapeutic drugs are of interest, because liposomes can protect against drug toxicity and reduce the toxicity of encapsulated drugs to normal cells (Table 2).

Gold nanoparticles

Consistent with the properties of gold, gold nanomaterials are also one of the most stable materials, and in the study of Mehak **dal et al., gold nanoparticles therapy was noted to have the remarkable feature of the convenience of targeted drug delivery. Gold nanoparticles are very promising in cancer therapy and can be used as contrast agents, carriers of pharmaceutical products, radiosensitizers and photothermal agents, etc. (**dal et al. 2020). The optical properties of gold and the quantum size of gold nanoparticles were reported by Michael Faraday as early as 1857. The size of gold nanomaterials ranges from 3 to 200 nm (Woodman et al. 2021). Metal or metal oxide nanoparticles are easily synthesized by physical, chemical or biological methods. Depending on the application of gold nanoparticles, they are made into various shapes and sizes, including gold nanospheres, nanocages, nanostars, nanoshells and nanorods, etc. Gold nanoparticles have high-sensitivity optical and electronic properties (Guo et al. 2017). Gold nanoparticles are considered as ideal radiosensitizers for radiotherapy due to high X-ray absorption and unique physicochemical properties. Multidisciplinary research was conducted to improve the design of gold nanoparticles to achieve better treatment effect (Chen et al. 2020). In the experiment of Romy Mueller et al., human lung cancer cell A549 was irradiated with gold nanoparticles, and by monitoring the expression of carcinoembryonic antigen (CEA) on the surface of lung cancer cells, it was found that the expression of CEA increased with the increase of radiation dose and time. This experiment shows that gold nanoparticles can significantly increase the expression of CEA (Mueller et al. 2020). Zhidong Teng et al. selected gold nanoparticles as an adjuvant in virus-like particle (VLP) vaccine because of the minimal toxicity of gold nanoparticles in vivo and in vitro, and the enhanced immune response (Teng et al. 2021). Functionalized gold nanoparticles can be used as biosensors to detect the content of human insulin. During the outbreak of the novel coronavirus, nanoparticles can also be used as nanoprobes to detect the nucleic acid (Fan et al. 2020). In 2004, the use of colloidal gold nanoparticles for targeted drug delivery to tumor tissue was first described by Giulio F Paciotti et al. This drug delivery system consists of thiol-derived PEG (PT) molecules, gold nanoparticles and recombinant human TNF (tumor necrosis factor), abbreviated as PT-cAu-TNF. After intravenous injection, PT-cAu-TNF rapidly accumulated in animal MC-38 colon cancer tumors, while in other normal tissues, such as liver and spleen, there was almost no aggregation. Compared with TNF alone, PT-cAu-TNF showed reduced toxicity to normal tissues and the enhanced antitumor effect at low doses (Paciotti et al. 2004). In the article by Jacob D. Gibson et al., they first described the synthesis of the drug functionalized nanoparticles by covalent attachment of the chemotherapeutic drug Paclitaxel to the surface of 2 nm gold nanoparticles (Gibson et al. 2007). Colloidal gold has been reported to treat rheumatoid arthritis, and radioactive gold nanoparticles were reported to treat liver cancer (Kumar et al. 2013). Gold nanoparticles have a great role in the treatment and diagnosis of various cancers, including but not limited to lung cancer, breast cancer, liver cancer, cervical cancer, rectal cancer, etc. (Liu et al. 2021). Related studies have also demonstrated that GNS@CaCO3/Ce6-NK has a significant targeting effect and superior therapeutic effect on lung cancer A549 tumor-bearing mice (Liu et al. 2019) (Table 2).

Quantum dots

Quantum dots (QDs) are nanoscale semiconductor crystals, which are alloyed nanocrystal colloids or core shells composed of II–VI or III–V elements in the periodic table. QDs were first discovered by Russian physicist Alexei in the 1980s. After that, QDs have been gradually developed in different medical fields, such as biomarkers, medical imaging, disease detection, cancer treatment, drug delivery, etc. There are many types of QDs, such as carbon QDs, graphene QDs, silicon QDs, gold QDs, etc. (Kargozar et al. 2020). QDs have many characteristics that other nanoparticles do not have. First, their sizes, ranging from 4 to 12 nm, are smaller than most nanoparticles. The smaller QDs make them more permeable through tight junction, such as blood–brain barrier (Gour et al. 2021). Second, QDs exhibit special photostability, photoluminescent and fluorescent activity due to their unique photophysical properties (Gour et al. 2021). In 1998, QDs were first applied to the fluorescent labeling of biological species (Wang and Chen 2011; Xu et al. 2021). Finally, QDs has larger specific surface area for more drugs loading (Henna and Pramod 2020). QDs have been used in nanomedicine. Doxorubicin (DOX) and methotrexate (MTX) are commonly used drugs for the treatment of cancer. Due to their poor solubility, they cannot be delivered to the desired tissues in free form. When combined with graphene QDs, they were well-entered into the desired tissues (Chung et al. 2021). In 2006, Noriyoshi Manabe conjugated QDs with the antihypertensive drug Captopril (QD-cap) to study the effect of QD-cap in vivo and in vitro. With QDs fluorescence properties the kinetics and dynamics of QD-cap were analyzed in blood and organs (Manabe et al. 2006). In addition, the peptides conjugated to QDs resulted in their selective accumulation in tumor tissues and blood vessels. Coupling of QDs with monoclonal antibodies against prostate-specific membrane antigens was used to detect the prostate cancer in mice. In addition, coupling of QDs with anti-fetoprotein antibodies was used to diagnose liver cancer (Pleskova et al. 2018). The above studies can all prove that QDs can increase the therapeutic effect of anticancer drugs, proving the possibility of quantum dot drug delivery system (Table 2).

Dendrimers

Dendrimers were first discovered by Donald Tomalia in 1985. They are composed of three parts: the core, the inner layer of repeating molecular units called dendrites, and the surface end groups. Because of this special structure, it has diverse ways of carrying drugs. Drugs can be loaded into the inner core or attached to the surface for delivery to the tissue (Dias et al. 2020). The size of dendrimer is between 2 nm and 10 nm. Dendrimer is used in nanomedicine in two types. One is a low molecular weight form, which is composed of a single dispersed symmetrical branch, and the other is the high molecular weight form, which is composed of dendrimers, hyperbranched and brush polymers (Woodman et al. 2021). The atom or group of atoms in the middle of a dendrimer surrounded by symmetrical branches is called dendrites, which grow from the inside out. The unique properties of dendrimers make them used in different biomedical fields, such as diagnostic reagents, delivery of drugs and proteins, and the development of vaccines, etc. In particular, the three-dimensional structure of dendrimer can combine multiple drugs to form active complexes, which are more effective than free drugs alone (Mittal et al. 2021). There are many functional groups on the surface of dendrimers, and the inner cavity also has a high loading capacity for drugs, which can improve the availability of drugs through covalent or non-covalent connection. Some dendrimers also have their own medicinal value and can be used for antifungal, antibacterial, etc. (Chis et al. 2020). The dendrimers were found to be toxic to some cell lines and the dendrimers with higher generation and increased positive surface charges were more toxic. Interestingly, the toxicity can be significantly reduced by different chemical modifications on its periphery, such as polyethylene glycol (PEG), acetyl group, carbohydrates, etc., while the activity of the dendrimer is not affected. By modification, the dendrimers can be toxic to cancer cells without affecting normal cells. Therefore, dendrimers have great potential for drug delivery (Janaszewska et al. 2019). In 2007, Vivagel® as the first dendrimer nanoparticle was introduced to the pharmaceutical market. The drug combined with the dendrimer prevents the virus from attaching to host cells for the prevention of human immunodeficiency virus and herpes virus spread (Aghebati-Maleki et al. 2020). Dendrimers are often combined with various antitumor drug molecules. The conjugation of doxorubicin (DOX) with dendrimers through acylhydrazone bonds can improve lung tumorigenesis. The conjugation of paclitaxel (PTX) with dendrimers increases specificity and cytotoxicity in breast cancer. The active cisplatin molecules coupled with dendrimers can be specifically targeted to ovarian tumor cells. Angiotensin conjugated with dendrimers forms stable complexes to inhibit cardiovascular diseases, etc. (Chis et al. 2020; Sandoval-Yanez and Castro Rodriguez 2020). In conclusion, in the drug delivery system, dendrimers not only have high drug-loading capacity but also can improve the selection of biological targets and specificity to tumor tissue (Table 2).

Carbon nanotubes

In 1976, Oberlin et al. first reported the composition of carbon nanotubes. Until 1991, the interest on it was aroused by the research by Iijima et al. and further promotes the development of the related nanotechnology (Saito et al. 2009). There are two types of carbon nanotubes. One is single-walled carbon nanotube (SWCNT), which is a tubular structure made of a layer of graphene rolled into a cylinder. Its diameter ranges from 0.4 nm to 40 nm. Because of good stability and flexibility it was paid much attention on. The other is multi-walled carbon nanotubes (MWCNTs), which are composed of multiple sheets forming concentric cylinders with diameters ranging from 2 to 100 nm (Negri et al. 2020). Carbon nanoparticles have the characteristics, such as high surface area, high loading capacity, stability, easy functionalization, cell membrane penetration and good cellular uptake, which makes it one of the preferred carriers for drug delivery systems (Chadar et al. 2021). Carbon nanoparticles suspension drip combined with parathyroid vascular preservation can effectively reduce the injury of parathyroid gland after thyroidectomy (Yin et al. 2020). Small molecules can be easily functionalized on or inside the carbon nanoparticle walls. Some studies showed that drugs delivered through carbon nanoparticles can be more efficiently absorbed by cells and trigger effective antifungal activity. To achieve a more significant effect in cancer treatment, carbon nanotubes can be easily combined with different bioactive molecules, functionalized, by covalent bond or non-covalent supramolecular assemblies for targeting (Chadar et al. 2021). Carbon nanotubes are of great significance in the treatment of diseases, such as malaria, Alzheimer’s disease, infectious diseases and asthma, and increased responsiveness in cardiovascular and pulmonary disease (Khan et al. 2021). In 2004, Shi Kam et al. first showed that carbon nanoparticles can be derivatized and be adhered to small molecules and proteins. Then, in 2005, Venkatesan et al. demonstrated that the bioavailability of EPO in rats can be improved by carbon nanoparticles as a drug delivery system. There was also a report that DNA plasmids was immobilized on carbon nanoparticles and introduced into target cells, which provided strong support for gene transfer (Saito et al. 2009). It has been reported that a drug delivery system of CNT:1,2-distearoylphosphatidylethanolamine-methyl PEG conjugates can not only release the drug in tumor tissue but also reduce the toxicity of gemcitabine hydrochloride (Deshmukh et al. 2020). The cardiotoxic anticancer agent Doxorubicin (Dox), an anthracycline anticancer drug, can be easily adsorbed on the surface of carbon nanotubes through π–π stacking interactions, and loaded onto the modified CNTs structure, which can not only adjust the dose but also increase its uptake by tumor cells, thereby reducing toxicity and achieving high efficiency (Chadar et al. 2021) (Table 2).

The formation of tumors is promoted by numerous factors, such as physical, chemical, biological, genetic, etc. This process is closely related to the structure and function of the tumor microenvironment (TME), which includes blood vessels, immune cells, and fibroblasts, signaling molecules and extracellular matrix, etc. The traditional therapeutic effect is always limited by the limited retention time in the TME (Kim et al. 2022). ** rapidly, especially the use of nano-drug delivery systems to improve the stability of drugs and successfully target drugs to tumor tissues, due to the adjustability, enhancement and retention effects of nanoparticles, the treatment effect is greatly improved, and the damage to the surrounding tissue is reduced. Nanoparticles such as polymers, liposomes, QDs, dendrimers, gold nanoparticles, etc. have now been studied, not only in lung cancer, but in a variety of tumors to accurately deliver drugs with minimal side effects. A series of preclinical studies have combined conventional drugs for the treatment of lung cancer with nanoparticles and used this drug delivery method to solve problems, such as drug solubility and toxicity. Compared with the use of free drugs alone, it can more effectively inhibit the growth of tumors and significantly improve the survival period of experimental animals. Paclitaxel is a commonly used anti-tumor drug. In clinical trials based on nanoparticles for the treatment of lung cancer, most of them combine paclitaxel with nanoparticles to target lung cancer. It has unique advantages in anti-lung cancer. Based on these characteristics of nanoparticles, their status in the medical field is gradually rising. To make nanoparticles more widely used in medicine, it is necessary to pay more attention to the use of materials that make up nanoparticles, and to control the toxicity of nanomaterials to achieve no harm to the human body, rational design of nanomaterials to increase cellular uptake, reduce cellular efflux, and achieve biocompatibility, etc. Solving these problems requires cooperation between bioengineering and biomedicine and even more disciplines. The development of better nanoparticles will bring a new dawn to the treatment of lung cancer.