This study plans to select 100 AV patients and randomly divide them into two groups in a 1:1 ratio: the experimental group will be treated with MRF combined with oral isotretinoic acid for 8 consecutive weeks, with a total of 3 MRF treatments at weeks 1, 4, and 8. The control group received oral administration of isotretinoic acid alone for 8 weeks. The main observation indicators are the percentage of effective skin injury clearance achieved by subjects at week 20, as well as the change in ECCA acne scar score compared to baseline at week 20. I hope this study can clarify that the combination therapy of the two can achieve the effects of improving efficacy, shortening treatment course, reducing recurrence, not increasing adverse reactions, and reducing the risk of scar formation.

Acne vulgaris (AV) is a chronic inflammatory skin disease that is prone to damage during adolescence. Based on the damage to appearance, it has a negative impact on the psychological and daily life of AV patients, increasing their economic burden. Isoretinoic acid is currently an oral medication targeting the four key pathological and physiological stages of AV, but adverse reactions are common, safe and effective, and the treatment or drug letter that can prevent scar formation remains unclear. Our preliminary research has confirmed that microneedle radiofrequency therapy (MRF) can effectively treat AV and improve post AV pigmentation and scar formation. To further confirm the efficacy and safety of MRF combined with oral isotretinoic acid in the treatment of moderate to severe AV, we plan to conduct a randomized, oral controlled prospective clinical study. This study plans to select 100 AV patients and randomly assign them to two groups in a 1:1 ratio: the experimental group was treated with MRF combined with oral isotretinoin for 8 weeks of continuous oral medication, and a total of 3 MRF sessions were conducted at weeks 1, 4, and 8. The control group was treated with oral isotretinoin alone for 8 weeks. The main observation indicators are the percentage of effective skin lesion clearance rate achieved by subjects at week 20, as well as the change in ECCA acne scar score from baseline at week 20. It is hoped that this study can clarify that the combination therapy of the two can achieve the effects of improving efficacy, shortening treatment course, reducing recurrence, not increasing adverse reactions, and reducing the risk of scar formation.

Inclusion Criteria:

1. Provide a signed and dated informed consent form before conducting any research related processes
2. Male and female aged 14-65
3. Patients clinically diagnosed with moderate to severe acne vulgaris (according to the Chinese Acne Treatment Guidelines, revised in 2019) must meet the Pillsbury International Modified Classification (see Appendix 5), which belongs to level II-III, and the IGA (Investigator Global Assessment) assessed by the study physician as moderate (3) or severe (4)
4. Type III-IV skin according to Fitzpatrick scale
5. Adhere to all lifestyle precautions throughout the entire study period and refrain from using other acne treatment drugs, etc.

Exclusion Criteria:

1. Pregnant women or women planning to conceive during the study period, pregnant or lactating women, and fertile female subjects who are unable to use or do not plan to use medically acceptable contraceptive measures. Male subjects who do not plan to use medically acceptable contraceptive measures.
2. For women with fertility: did not use medically approved contraceptive measures for at least one month prior to screening, and did not agree to use medically approved contraceptive measures during the study period or within 30 days after the end of study drug use.
3. Individuals who currently meet any of the following conditions in clinical practice: aggregate acne, fulminant acne, secondary acne (drug-induced acne), or any facial skin condition or facial hair that may interfere with clinical evaluation (such as sideburns, sideburns, beard). The following types of skin diseases that can interfere with the evaluation of acne vulgaris include folliculitis, rosacea, demodex, pustular vasculitis, mechanical acne, occupational acne including oily or tar acne, as well as chloroacne, facial disseminated lupus lesions, etc.
4. Facial sunburn
5. Researchers believe that laboratory values or electrocardiogram examinations with clinically significant abnormalities should be screened, including but not limited to the following situations (if the screening period test results are difficult to explain, according to the researcher's judgment, a repeated measurement is allowed): 1) Fasting blood glucose is greater than the upper limit of normal values; 2) Creatine kinase is greater than or equal to twice the upper limit of normal value; 3) Liver function (AST or ALT) greater than 1.5 times the upper limit of normal value; 4) Creatinine is higher than the upper limit of normal value; 5) Female pregnancy test positive; 6) Abnormal ECG examination has clinical significance.
6. Participated in clinical studies of other drugs and devices within the first three months of screening;
7. Select subjects who have undergone major surgery (i.e. require general anesthesia) within the first 12 weeks, have not fully recovered from surgery, or are expected to undergo surgery during the study period.
8. Subjects with any of the following medical histories should be excluded: 1) those who are allergic to isotretinoids or any component of the investigational drug, or have a history of multiple drug allergies; 2) known or suspected precancerous lesions or malignant diseases, including a history of malignant tumors within the previous 5 years of screening (such as evidence of any tumor activity within the past 5 years, or diagnosed with malignant tumors within that period, excludingSkin cancer treated with Gong therapy.
9. Subjects who have used any of the following drugs before enrollment in the study, or who are currently using these drugs and have not completed the washout period as required below: Note: The washout period should be calculated from the expected randomization date (day 0). The random allocation date can be adjusted to ensure that the subjects complete the washout period.1) Within one week before randomization: all medical skincare products with acne relieving effects; 2) Within 2 weeks before randomization: topical acne treatment drugs, including but not limited to: topical corticosteroids; External use of retinoic acid drugs; Topical application of benzoyl peroxide; Topical antibiotics (clindamycin; erythromycin; lincomycin, etc.); External use of azelaic acid drugs; 3) Within the first 4 weeks of randomization: laser and photodynamic therapy; Antibiotics used throughout the body (tetracyclines, macrolides, etc.); Finasteride; Systemic use of sex hormones (estrogen, progesterone, and progesterone); Chinese medicine or traditional Chinese patent medicines and simple preparations for acne treatment; Immunosuppressants (cyclosporine/Tripterygium wilfordii/Methotrexate, etc.); Immunomodulators (glycyrrhizic acid glycoside/tanshinone/berberine, etc.) 4) Within the first 12 weeks of randomization: systemic administration of isotretinoids; Use corticosteroids throughout the body; Biological agents with immunomodulatory effects, such as omalizumab.
10. Subjects with severe liver, kidney, cardiovascular, respiratory, endocrine, hematological, urinary, metabolic, central nervous system, or autoimmune diseases.
11. Screening shows a history of drug abuse and alcohol abuse within the first 2 years.
12. The research center personnel and/or their immediate family members who directly participated in this study. Immediate relatives refer to spouses, parents, children or siblings (who are related by blood or legally adopted).
13. Other situations that the researcher deems unsuitable for participation in the study.