1.Single-cell spatial profiling reveals immune-steroidogenic crosstalk in adrenals of patients with primary aldosteronism
Noorzaileen Eileena Zaidi ; Amnani Aminuddin ; Aina Nadheera Abd Rahman ; Faeezah Abdul Latif ; Emily Goodchild ; Kate Laycock ; Eva Wozniak ; Charles Mein ; Muaatamarulain Mustangin ; Nor Adzimah Johdi ; Nor Haslinda Abd Aziz ; Adli Ali ; Azraai Bahari Nasruddin ; Miroslav Solar ; Troy Puar Hai Kiat ; Norlela Sukor ; William Drake ; Morris Jonathan Brown ; Elena Aisha Azizan
Journal of the ASEAN Federation of Endocrine Societies 2026;41(S1):6-
Introduction:
Primary aldosteronism (PA), most commonly caused by aldosterone-producing adenomas (APAs), represents the leading
form of surgically curable secondary hypertension. While genomic studies have elucidated the mutational landscape
of APAs, the spatial organisation and functional role of immune populations across APAs, aldosterone-producing
micronodules (APMs), and adjacent adrenal cortex remain poorly defined at single-cell resolution.
Methodology:
Single-cell RNA sequencing (scRNA-seq) was integrated with spatial transcriptomics in APAs and paired adjacent adrenal
cortex, complemented by immunohistochemical (IHC) validation. Immune populations were spatially mapped using
canonical markers (CD14, CD68, CD163, HLA-DR, CD8A, and CD4) across defined adrenocortical regions.
Results:
The adrenal microenvironment in PA demonstrates structured immune organisation rather than passive infiltration.
CD14+ monocyte-lineage cells localize intraparenchymally within APAs (n = 10), intercalating between CYP11B2+
aldosterone-producing cells and forming a pattern distinct from perivascular immune niches. scRNA-seq further
identified a transcriptionally distinct CD14+ population within the zona reticularis (zR) that co-expresses steroidogenic
markers (CYB5A, SULT2A1, TSPAN12) while lacking canonical monocyte transcripts. IHC supported this observation,
demonstrating CD14 expression within adrenocortical zR parenchymal cells (n = 5). In parallel, CD4 and HLA-DRA
exhibited diffuse cytoplasmic staining within zR parenchymal cells in the absence of classical macrophage marker coexpression (CD68), suggesting non-canonical or context-dependent expression within steroidogenic compartments.
CD68+ and CD163+ macrophages were sparsely distributed across APA, APM and adjacent cortex, consistent with lowdensity tissue-resident populations, while CD8A+ cytotoxic lymphocytes were enriched in APAs and APMs with diffuse
parenchymal cytoplasmic staining of CD8A additionally observed within the zR.
Conclusion
These findings reveal a previously unrecognized spatially organised immune-steroidogenic interface within the adrenal
cortex. The presence of immune-associated transcriptional and protein signatures within zR cells suggests potential
functional plasticity of steroidogenic cells, possibly extending to antigen presentation-related pathways, warranting
further mechanistic investigation
Hyperaldosteronism
;
Humans
2.Disseminated Histoplasmosis Presenting as Addisonian Crisis: A Diagnostic Mimic of Tuberculosis With Bilateral Adrenal Masses
Aminuddin Baki Amran ; Nur Aini Eddy Warman ; Aimi Fadilah Mohamad ; Nur Haziqah Baharum ; Mohd Hazriq Awang ; Fatimah Zaherah Mohamed Shah ; Rohana Abdul Ghani
Journal of the ASEAN Federation of Endocrine Societies 2026;41(S1):22-23
Introduction:
Disseminated histoplasmosis is a rare but important cause
of adrenal insufficiency (AI), particularly in tuberculosis
(TB)-endemic regions, where it may mimic granulomatous
diseases. Adrenal involvement occurs in up to 80% of
disseminated cases, although overt AI is less common.
Reported cases described bilateral adrenal masses
mimicking malignancy or TB, even in immunocompetent
individuals. Addisonian crisis may be the initial
manifestation, especially when the diagnosis is delayed. In
TB-endemic settings, fungal infections are often overlooked,
leading to delayed diagnosis and inappropriate therapy.
Case:
We reported a case of a 68-year-old male with underlying
diabetes mellitus who presented with fever, cough,
dysphagia, and weight loss for 1 month. He was
empirically treated as smear-negative disseminated TB.
On day 2 of therapy, he developed hypotension (80/50
mmHg), hypoglycemia (3.9 mmol/L), hyponatremia
(Na 129 mmol/L), and hyperkalemia (K 5.1 mmol/L),
suggestive of adrenal crisis, and was started on intravenous
hydrocortisone. Serum cortisol prior to treatment was 61 nmol/L. Computed tomography (CT) imaging revealed
bilateral lipid-poor adrenal lesions (right: 3.6 × 2.2 × 4.9 cm,
Hounsfield Unit (HU) 36 and absolute washout 33%; left:
3.5 × 2.4 × 5.4 cm; HU 35 and absolute washout 17%),
raising suspicion of infectious or malignant etiologies.
Endoscopic ultrasound-guided biopsy demonstrated
necrotizing granulomatous inflammation with budding
fungal yeasts on Pituitary Apoplexy Score and GMS
staining, consistent with Histoplasma capsulatum. TB and
malignancy were excluded. He received amphotericin B for
14 days, followed by oral itraconazole for 1 year, and oral
hydrocortisone replacement. At 1-year follow-up, adrenal
lesions remained stable on CT images, and he continued
to require hydrocortisone replacement.
Conclusion
This case highlights the importance of considering
disseminated histoplasmosis as a differential diagnosis
of bilateral adrenal masses with AI, especially with poor
response to anti-TB therapy. Early tissue diagnosis is
essential, as imaging findings are non-specific. Prompt
recognition is critical to prevent life-threatening adrenal
crisis and improve clinical outcomes.
Histoplasmosis
;
Tuberculosis
3.Not Just Another Case of Type 2 Diabetes in an Adolescent
Aminuddin Ab Rahman ; Nga Xhi Wen Daniel ; Noor Hafis Md Tob ; Yong Siang Ng ; Norhaliza Mohd Ali
Journal of the ASEAN Federation of Endocrine Societies 2026;41(S1):50-51
Introduction:
Cushing’s disease (CD) in adolescents may present with
subtle clinical features, resulting in a significant diagnostic
challenge. We report a case of a young lady whose CD
initially masqueraded as Type 2 diabetes (T2D), highlighting
the difficulties in differentiating early hypercortisolism
from T2D.
Case:
A 12-year-old female was incidentally diagnosed with
diabetes during routine medical screening. Examination
revealed an overweight female without the classical
features of Cushing’s syndrome. Due to the presence of
acanthosis nigricans, a diagnosis of T2D was initially made.
Her diabetes remained well-controlled with a single oral
glucose-lowering drug.
The diagnostic challenge became apparent over time.
She experienced delayed menarche at the age of 17, and
a diagnosis of Cushing’s syndrome was suspected when
she subsequently developed hypertension and reduced
bone mineral density. Biochemical evaluation was
consistent with adrenocorticotropic hormone (ACTH)-
dependent hypercortisolism, evidenced by the failure of
serum cortisol suppression on low dose and overnight
dexamethasone suppression tests. Her 24-hour urinary
cortisol was elevated twofold, and plasma ACTH was
elevated (17.8 pmol/L). MRI demonstrated a right-sided
pituitary microadenoma (0.3 × 0.5 × 0.3 cm), and inferior
petrosal sinus sampling confirmed the diagnosis of CD. She underwent endoscopic transsphenoidal surgery 7 years
later, which was complicated by panhypopituitarism and
cranial diabetes insipidus. Postoperatively, CD was cured,
with the resolution of her metabolic comorbidities.
Conclusion
Despite the increasing prevalence of T2D in adolescents,
clinicians must recognize the diagnostic challenge of CD
in this age group. Atypical manifestations in a presumed
T2D patient should prompt consideration of Cushing’s
syndrome.
Adolescent
;
Humans
;
Diabetes Mellitus, Type 2
4.Pilot Study on Prevalence of Enamel Erosion in PatientsHaving Gastroesophageal Reflux Disease (GERD) Attending IIUM Dental Clinic
Ahmad Nur Hilmi Ahmad Tajudin ; Aiman Za&rsquo ; im Aminuddin ; Hamad Abdulsalam Hamad Alfarisi ; Basma Ezza Mustafa ; Naziyah Shaban Mustafa ; Muhammad Ateeq Md Jalil
Annals of Dentistry 2025;32(No. 1):48-53
Gastroesophageal reflux disease (GERD) is a common digestive disorder that affects millions of people worldwide. Reflux of gastric acid may cause oral acidification that can induce teeth demineralization. Destruction of dental hard tissue by acid reflux necessitates a combine approach involving medical and dental profession. This pilot study aims to assess associationbetween enamel erosion and GERD, and estimate prevalence of enamel erosion among GERD patients. A total of 22 patients (GERD and control) were involved in this case-control study. Dental charting was done using five-point ordinal scales of modified Tooth Wear Evaluation System (TWES 2.0). Cohen’s Kappa Coefficient was used for assessment of intra-rater and inter-rater reliability. Fisher’s Exact Test was used to determine association between enamel erosion and GERD, reflecting prevalence. Out of 11 GERD patients, 63.6% exhibit enamel erosion, whereas only 9.1% ofcontrol patient presented with enamel erosion. Fisher’s Exact Test showed a significant prevalence of enamel erosion in GERD patients (p=0.024).This study showeda clear association between enamelerosion and GERD, and it can be considered as an oral manifestation in patient with GERD. Future study involving large sample size is recommended to show clear statistical evidence ofassociation betweenenamel erosion and GERD.
5.ENDOVASCULAR RETRIEVAL OF AN ACCIDENTALLY CUT CHEMOPORT CATHETER FROM THE HEART
Muhammad Aminuddin Ashari ; Nik Farhan Nik Fuad
Journal of University of Malaya Medical Centre 2024;27(1):141-145
ENDOVASCULAR RETRIEVAL OF AN ACCIDENTALLY CUT CHEMOPORT CATHETER FROM THE HEART
A 40-year-old lady with underlying rectal adenocarcinoma presented to the angiography suite for an elective removal of an infected chemoport. The catheter was inadvertently cut during the procedure resulting in the dislodgment of the embolized fragment into the right side of the heart. Retrieval of the catheter using the endovascular approach described in this case was successful without any serious adverse events to the patient.
6.Effect of Probiotic Adjuvant Therapy on Improvement of Clinical Symptoms & Interleukin 6 Levels in Patients With Schizophrenia
Edy Husnul MUJAHID ; Erlyn LIMOA ; Saidah SYAMSUDDIN ; Burhanuddin BAHAR ; Rinvil RENALDI ; Aminuddin AMINUDDIN ; Sonny T. LISAL
Psychiatry Investigation 2022;19(11):898-908
Objective:
This study aims to examine the effect of giving probiotic adjuvant therapy on improving clinical symptoms & IL-6 levels in patients with schizophrenia.
Methods:
This research was a double-blind, placebo-controlled trial conducted at Dadi Psychiatric Hospital, South Sulawesi Province, Indonesia in November–December 2021. The sample of the research was patients with schizophrenia undergoing hospitalization who received therapeutic doses of risperidone with a total of 21 samples in each treatment and control group. Research subjects were measured with Positive and Negative Syndrome Scale (PANSS) at baseline, 2nd, 4th, and 6th weeks. The treatment group received one capsule/12 hours/oral of probiotics for six weeks and the control group received 1 capsule/12 hours/oral placebo for 6 weeks. In addition, two measurements of IL-6 using enzyme-linked immunosorbent assay were performed in both groups, namely at the beginning of week 0 and the end of the 6th week.
Results:
We found the decrease in the PANSS value which described the improvement in clinical symptoms of the schizophrenic group after receiving therapeutic doses of antipsychotics and probiotic capsules or the treatment group as well as the schizophrenia group receiving therapeutic doses of antipsychotics and placebo capsules or the control group.
Conclusion
Improvements in clinical symptoms and decreased levels of IL-6 in the group of patients with schizophrenia who received risperidone with probiotic adjuvant therapy were better than in the group of patients with schizophrenia who received risperidone without probiotics as adjuvant therapy.
7.Case scenario: Management of major depressive disorder in primary care based on the updated Malaysian clinical practice guidelines
Mohd Aminuddin Mohd Yusof ; Uma Visvalingam ; Umi Adzlin Silim ; Muhammad Muhsin Ahmad Zahari ; Firdaus Abdul Gan ; Noormazita Mislan ; Noor Izuana Redzuan ; Peter Kuan Hoe Low ; Sing Yee Tan ; Masseni Abd Aziz ; Aida Syarinaz Ahmad Adlan ; Suzaily Wahab
Malaysian Family Physician 2022;17(1):71-77
Major depressive disorder (MDD) is a common but complex illness that is frequently presented in the primary care setting. Managing this disorder in primary care can be difficult, and many patients are underdiagnosed and/or undertreated. The Malaysian Clinical Practice Guidelines (CPG) on the Management of Major Depressive Disorder (MDD) (2nd ed.), published in 2019, covers screening, diagnosis, treatment and referral (which frequently pose a challenge in the primary care setting) while minimising variation in clinical practice.
Depression
;
Depressive Disorder, Major
;
Primary Health Care
;
Therapeutics
8.Malaysian clinical practice guidelines for management of diabetic foot: A synopsis for the primary care physician
Tharumaraja Thiruselvam ; Aminudin Che Ahmad ; Wong Ping Foo ; Afiza Hanun Ahmad@Hamid ; Mohd Idham Hasan ; Mohd Yazid Bajuri ; Gurmeet Singh s/o Sewa Singh ; Vijiya Mala Valayatham ; Siti Norzalilah Abdul Majid ; Hafizan Mohd Tajri ; Masfiza Abdul Hamid ; Ainol Haniza Kherul Anuwar ; Mohd Aminuddin Mohd Yusof
Malaysian Family Physician 2021;16(1):103-113
Diabetic foot requires careful attention and coordinated management by a dedicated team. Screening, prevention, adequate assessment, and appropriate referral are crucial to prevent complications. Multimodal treatment and rehabilitation are recommended to ensure a better quality of life and reduction of amputation rate in people with diabetic foot.
9.Evaluation of beak and feather disease virus, avian polyomavirus and avian papillomavirus of captives psittacine birds in Seri Kembangan, Selangor, Malaysia
Muhammad Faiz Mohd Padzil ; Nur Syafiqah Ab Halim ; Nurulhuda Najihah ; Aminuddin Baki Nurul Najian ; Jalila Abu ; Nurulfiza Mat Isa ; Han Yih Lau ; Abdul Razak Mariatulqabtiah
Malaysian Journal of Microbiology 2021;17(3):338-344
Aims:
Psittacine birds such as parrots, macaws, cockatoos, lovebirds and parakeets, are widely reared as household
pets or at aviary due to their attractive features. However, the status of virus-causing diseases of psittacine species in
Malaysia is fairly under-documented. Therefore, this study was aimed to detect the presence of three common avian
viruses that infect psittacine birds, i.e. beak and feather disease virus (BFDV), avian polyomavirus and avian
papillomavirus.
Methodology and results:
Faecal samples from twelve asymptomatic captive psittacine birds of different species were
collected from an undisclosed animal garden in Serdang, Selangor, Malaysia. Briefly, the sample was homogenised and
resuspended with SM buffer with the ratio 1:1 (weight of sample/g: volume of SM buffer/mL) before centrifugation at
1,000 × g for 20 min. The supernatant was collected and filtered before subjected to genomic DNA extraction using a
commercialised kit. Polymerase chain reaction (PCR) technique was used to screen the V1, VP1 and L1 genes of beak
and feather disease virus (BFDV), avian polyomavirus and avian papillomavirus, respectively. Findings revealed that the
samples were negative for BFDV and avian polyomavirus. However, positive results of 1.5 kbp PCR amplicon were
detected for avian papillomavirus in four out of the 12 samples (33.33%), which was from the white-crested cockatoo,
African grey parrot, yellow-collared macaw and Senegal parrot. Sequence analysis of the L1 gene from the Senegal
parrot Poicephalus senegalus revealed 93% identity to a reference Psittacus erithacus timneh avian papillomavirus.
Conclusion, significance and impact of study
This study added to the limited prevalence data of three important
avian viruses which infect captive psittacines in Seri Kembangan, Selangor, Malaysia. Avian papillomavirus, but not
BFDV and avian polyomavirus, was detected in the collected captive psittacine birds. Therefore, a routine screening can
be performed to monitor the health status of birds despite their asymptomatic manifestation, in order to prevent possible
virus transmission.
Virus Diseases
;
Birds
10.Review on the In Vitro Cytotoxicity Assessment in Accordance to the International Organization for Standardization (ISO)
Muhammad Aminuddin Mohd Shafiee ; Mohd Ashraf Muhamad Asri ; Sharifah Sakinah Syed Alwi
Malaysian Journal of Medicine and Health Sciences 2021;17(No.2):261-269
Cytotoxicity is a predominant biological evaluation applied to search for a suitable and non-toxic bioactive compound and to determine the biocompatibility of medical devices-related human body. The broad usage of cytotoxicity tests leads to a robust establishment of cytotoxicity assays with high sensitivity and prompt results. In vitro assays
are always prioritized over in vivo due to the reproducible data, reduce numbers of animal used and easily accessible
material. Compounds concentration that execute 50% of cell population is determined by calculating the IC50. According to ISO10993, cytotoxicity tests must be performed to determine the biocompatibility of medical devices that
has contact with human body. This is crucial to ensure the safety of research and its clinical use. Under the recommendation of ISO10995-Part 5, three categories of tests have been documented; extract elution, direct contact and
indirect contact test. Each category plays significant role depending on the nature of experiment and sample used.


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